Circuit-Breakers > Stud-Mount-Circuit-Breakers

12V Auto Reset Metal Circuit Breakers with Mounting Bracket

12V circuit breaker

Durable 12V Automotive Circuit Breakers – Reliable Overcurrent Protection for DC Applications

Automotive circuit breakers are critical for providing continuous overcurrent protection in DC applications, automatically resetting to safeguard vehicle and equipment systems. Specifically engineered for 12V DC circuits, these auto-reset breakers cycle until the overcurrent issue is detected and resolved, ensuring reliable performance. Del City offers an extensive range of 12V canned circuit breakers, with options from 5 to 50 amps, ideal for diverse uses. Available in both metal and plastic housings and with or without brackets, these circuit breakers feature stud mounts and a single pole design, qualifying as type 1 circuit breakers. Their versatility makes them perfect for a variety of applications, including installation in trucks, buses, welding tools, power outlets, portable generators, and trolling motors. Constructed with a durable internal composite alloy, these breakers are designed to separate contacts upon overcurrent and return to operation as the system cools. They operate in temperatures from -10°F to 150°F and store safely between -20°F and 200°F, proving their durability in extreme environments. Each breaker comes with nuts and washers for straightforward installation. Additionally, Del City’s 12V circuit breakers are fully compatible with EATON/Bussmann models like 121A05-B2M-KA through 121A50-B2M-KA, providing reliable and interchangeable solutions for your DC electrical needs. Note: some products may incur tariff charges at checkout.

Products on this page may be affected by tariff charges at checkout.


  • Operating temperature: -10° F to 150° F.
  • Storage temperature: -20° F to 200° F.
  • Engineered for durability.
  • Breakers include nuts and washers.
  • Constructed with internal composite alloy material to deflect and separate the contacts when an overcurrent situation occurs and return to the run mode as it cools.
  • Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Metal, is comparable with EATON/Bussmann parts: 121A05-A2M-KA, 121A06-A2M-KA, 121A10-A2M-KA, 121A15-A2M-KA, 121A20-A2M-KA, 121A25-A2M-KA, 121A30-A2M-KA, 121A35-A2M-KA, 121A40-A2M-KA, 121A50-A2M-KA
  • Click here for the circuit breaker insulator.

Item Description Price
1+ I Ext. Price I 25+ Ext. Price I I 200+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
72101 Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Metal, 5 Amp (1 MIN) drawing
3.28100 3.28 I 2.71200 2.71 I 2.03900 2.04
1 EA ✓
72102 Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Metal, 6 Amp (1 MIN) drawing
3.28100 3.28 I 2.71200 2.71 I 2.03900 2.04
1 EA ✓
72105 Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Metal, 10 Amp (1 MIN) drawing
3.37400 3.37 I 2.71200 2.71 I 2.03900 2.04
1 EA ✓
72115 Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Metal, 15 Amp (1 MIN) drawing
3.37400 3.37 I 2.71200 2.71 I 2.03900 2.04
1 EA ✓
72125 Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Metal, 20 Amp (1 MIN) drawing
3.37400 3.37 I 2.71200 2.71 I 2.03900 2.04
1 EA ✓
72075 Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Metal, 25 Amp (1 MIN) drawing
3.28100 3.28 I 2.71200 2.71 I 2.03900 2.04
1 EA ✓
72135 Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Metal, 30 Amp (1 MIN) drawing
3.37400 3.37 I 2.71200 2.71 I 2.03900 2.04
1 EA ✓
72145 Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Metal, 35 Amp (1 MIN) drawing
3.37400 3.37 I 2.71200 2.71 I 2.03900 2.04
1 EA ✓
72165 Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Metal, 40 Amp (1 MIN) drawing
3.37400 3.37 I 2.71200 2.71 I 2.03900 2.04
1 EA ✓
72175 Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Metal, 50 Amp (1 MIN) drawing
3.80900 3.81 I 3.07400 3.07 I 2.31800 2.32
1 EA ✓

12V Auto Reset Metal Circuit Breakers with Parallel Mounting Bracket

12V Circuit Breaker- Auto Reset

Durable 12V Automotive Circuit Breakers – Reliable Overcurrent Protection for DC Applications

Automotive circuit breakers are critical for providing continuous overcurrent protection in DC applications, automatically resetting to safeguard vehicle and equipment systems. Specifically engineered for 12V DC circuits, these auto-reset breakers cycle until the overcurrent issue is detected and resolved, ensuring reliable performance. Del City offers an extensive range of 12V canned circuit breakers, with options from 5 to 50 amps, ideal for diverse uses. Available in both metal and plastic housings and with or without brackets, these circuit breakers feature stud mounts and a single pole design, qualifying as type 1 circuit breakers. Their versatility makes them perfect for a variety of applications, including installation in trucks, buses, welding tools, power outlets, portable generators, and trolling motors. Constructed with a durable internal composite alloy, these breakers are designed to separate contacts upon overcurrent and return to operation as the system cools. They operate in temperatures from -10°F to 150°F and store safely between -20°F and 200°F, proving their durability in extreme environments. Each breaker comes with nuts and washers for straightforward installation. Additionally, Del City’s 12V circuit breakers are fully compatible with EATON/Bussmann models like 121A05-B2M-KA through 121A50-B2M-KA, providing reliable and interchangeable solutions for your DC electrical needs. Note: some products may incur tariff charges at checkout.

Products on this page may be affected by tariff charges at checkout.


  • Operating temperature: -10° F to 150° F.
  • Storage temperature: -20° F to 200° F.
  • Engineered for durability.
  • Breakers include nuts and washers.
  • Constructed with internal composite alloy material to deflect and separate the contacts when an overcurrent situation occurs and return to the run mode as it cools.
  • Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Metal, is comparable with EATON/Bussmann parts: 121A05-A2M-KA, 121A06-A2M-KA, 121A10-A2M-KA, 121A15-A2M-KA, 121A20-A2M-KA, 121A25-A2M-KA, 121A30-A2M-KA, 121A35-A2M-KA, 121A40-A2M-KA, 121A50-A2M-KA
  • Click here for the circuit breaker insulator.

Item Description Price
1+ I Ext. Price I 25+ Ext. Price I I 200+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
71100 Auto Reset Stud Mount Circuit Breaker with Parallel Mounting Bracket, Metal, 5 Amp (1 MIN) drawing
3.28100 3.28 I 2.71200 2.71 I 2.03900 2.04
1 EA ✓
71106 Auto Reset Stud Mount Circuit Breaker with Parallel Mounting Bracket, Metal, 10 Amp (1 MIN) drawing
3.28100 3.28 I 2.71200 2.71 I 2.03900 2.04
1 EA ✓
71108 Auto Reset Stud Mount Circuit Breaker with Parallel Mounting Bracket, Metal, 15 Amp (1 MIN) drawing
3.28100 3.28 I 2.71200 2.71 I 2.03900 2.04
1 EA ✓
71110DL Auto Reset Stud Mount Circuit Breaker with Parallel Mounting Bracket, Metal, 20 Amp (1 MIN) drawing
3.28100 3.28 I 2.71200 2.71 I 2.03900 2.04
1 PC ✓
71112DL Auto Reset Stud Mount Circuit Breaker with Parallel Mounting Bracket, Metal, 25 Amp (1 MIN) drawing
3.28100 3.28 I 2.71200 2.71 I 2.03900 2.04
1 EA Call
71114 Auto Reset Stud Mount Circuit Breaker with Parallel Mounting Bracket, Metal, 30 Amp (1 MIN) drawing
3.28100 3.28 I 2.71200 2.71 I 2.03900 2.04
1 EA ✓
71116 Auto Reset Stud Mount Circuit Breaker with Parallel Mounting Bracket, Metal, 35 Amp (1 MIN) drawing
3.28100 3.28 I 2.71200 2.71 I 2.03900 2.04
1 EA ✓
71118 Auto Reset Stud Mount Circuit Breaker with Parallel Mounting Bracket, Metal, 40 Amp (1 MIN) drawing
3.28100 3.28 I 2.71200 2.71 I 2.03900 2.04
1 EA ✓
71120 Auto Reset Stud Mount Circuit Breaker with Parallel Mounting Bracket, Metal, 50 Amp (1 MIN) drawing
3.80900 3.81 I 3.07400 3.07 I 2.31800 2.32
1 EA ✓

12V Auto Reset Metal Circuit Breakers without Bracket

12V Auto Reset Circuit Breakers

Reliable 12V Auto Reset Automotive Circuit Breakers for Safe DC Overcurrent Protection

An auto reset automotive circuit breaker ensures continuous operation in DC applications by automatically recycling during an overcurrent condition, maintaining protection until the issue is resolved. Del City provides a wide selection of 12V auto reset circuit breakers, with ratings ranging from 5 to 50 amps to meet diverse application requirements. These single-pole, stud-mount breakers are available in metal or plastic housings and can be purchased with or without brackets for added installation flexibility. Classified as type 1 breakers, they are suitable for numerous applications, including automotive systems in trucks and buses, as well as portable generators, welding equipment, trolling motors, and multi-outlet power strips. Use with compatible circuit breaker mounting brackets for streamlined installation. Constructed from a durable internal composite alloy, these breakers deflect and separate contacts during overcurrent events, then reset as the device cools. Engineered to perform in challenging conditions, they operate between -10°F and 150°F and are safely stored from -20°F to 200°F. Each breaker includes nuts and washers for easy setup and offers compatibility with popular EATON/Bussmann models, such as 121A06-00M-KA through 121A50-00M-KA, providing reliable interchangeability and quality assurance. Please note that products may be subject to tariff charges at checkout.

Products on this page may be affected by tariff charges at checkout.


  • Operating temperature: -10° F to 150° F.
  • Storage temperature: -20° F to 200° F.
  • Engineered for durability.
  • Breakers include nuts and washers.
  • Constructed with internal composite alloy material to deflect and separate the contacts when an overcurrent situation occurs and return to the run mode as it cools.
  • Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Metal, is comparable with EATON/Bussmann parts: 121A05-A2M-KA, 121A06-A2M-KA, 121A10-A2M-KA, 121A15-A2M-KA, 121A20-A2M-KA, 121A25-A2M-KA, 121A30-A2M-KA, 121A35-A2M-KA, 121A40-A2M-KA, 121A50-A2M-KA
  • Click here for the circuit breaker insulator.

Item Description Price
1+ I Ext. Price I 25+ Ext. Price I I 200+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
72302 Auto Reset Stud Mount Circuit Breaker w/o Mounting Bracket, Metal, 6 Amp (1 MIN) drawing
2.82600 2.83 I 2.37 2.37 I 1.69700 1.70
1 EA ✓
72305 Auto Reset Stud Mount Circuit Breaker w/o Mounting Bracket, Metal, 10 Amp (1 MIN) drawing
3.04300 3.04 I 2.37 2.37 I 1.69700 1.70
1 EA Call
72312 Auto Reset Stud Mount Circuit Breaker w/o Mounting Bracket, Metal, 12 Amp (1 MIN)
3.04300 3.04 I 2.37 2.37 I 1.69700 1.70
1 EA ✓
72315 Auto Reset Stud Mount Circuit Breaker w/o Mounting Bracket, Metal, 15 Amp (1 MIN) drawing
3.04300 3.04 I 2.37 2.37 I 1.69700 1.70
1 EA ✓
72325 Auto Reset Stud Mount Circuit Breaker w/o Mounting Bracket, Metal, 20 Amp (1 MIN) drawing
3.04300 3.04 I 2.37 2.37 I 1.69700 1.70
1 EA Call
72365 Auto Reset Stud Mount Circuit Breaker w/o Mounting Bracket, Metal, 25 Amp (1 MIN) drawing
2.82600 2.83 I 2.37 2.37 I 1.69700 1.70
1 EA ✓
72335 Auto Reset Stud Mount Circuit Breaker w/o Mounting Bracket, Metal, 30 Amp (1 MIN) drawing
3.04300 3.04 I 2.37 2.37 I 1.69700 1.70
1 EA ✓
72345 Auto Reset Stud Mount Circuit Breaker w/o Mounting Bracket, Metal, 40 Amp (1 MIN) drawing
3.04300 3.04 I 2.37 2.37 I 1.69700 1.70
1 EA ✓
72385 Auto Reset Stud Mount Circuit Breaker w/o Mounting Bracket, Metal, 50 Amp (1 MIN) drawing
3.16700 3.17 I 2.57700 2.58 I 1.97700 1.98
1 EA ✓

12V Auto Reset Plastic Circuit Breakers with Mounting Bracket

12V Auto Reset Circuit Breakers

12V Auto-Reset Automotive Circuit Breakers – Reliable Overcurrent Protection for DC Applications

Automotive circuit breakers are essential for maintaining safety in DC applications by providing continuous overcurrent protection. These auto-reset circuit breakers are specifically designed to cycle repeatedly until the overcurrent source is found and corrected, delivering dependable performance. Del City offers a broad range of 12V circuit breakers in amperages from 5 to 50 amps to suit a variety of needs. These 12V canned breakers come in both metal and plastic housings, with options for brackets or without, making them versatile for different installations. Featuring a single pole and stud mount design, these type 1 circuit breakers are ideal for automotive use in trucks, buses, and additional applications like welding tools, power outlet strips, portable generators, and trolling motors. Engineered for durability, each circuit breaker includes nuts and washers for easy installation. Constructed with an internal composite alloy material, these breakers efficiently separate contacts in an overcurrent event and reset automatically once cooled. They operate within a temperature range of -10°F to 150°F and can be stored from -20°F to 200°F, proving reliability across diverse environments. Compatible with EATON/Bussmann models like 121A10-A2P-KA through 121A40-A2P-KA, these Del City circuit breakers provide trusted quality and interchangeable options for your electrical needs. Be aware that some products may incur tariff charges at checkout.

Products on this page may be affected by tariff charges at checkout.


  • Operating temperature: -10° F to 150° F.
  • Storage temperature: -20° F to 200° F.
  • Engineered for durability.
  • Breakers include nuts and washers.
  • Constructed with internal composite alloy material to deflect and separate the contacts when an overcurrent situation occurs and return to the run mode as it cools.
  • Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Metal, is comparable with EATON/Bussmann parts: 121A05-A2M-KA, 121A06-A2M-KA, 121A10-A2M-KA, 121A15-A2M-KA, 121A20-A2M-KA, 121A25-A2M-KA, 121A30-A2M-KA, 121A35-A2M-KA, 121A40-A2M-KA, 121A50-A2M-KA
  • Click here for the circuit breaker insulator.

Item Description Price
1+ I Ext. Price I 25+ Ext. Price I I 200+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
72215 Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Plastic, 10 Amp (1 MIN) drawing
3.03300 3.03 I 2.55600 2.56 I 1.69700 1.70
1 EA ✓
72225 Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Plastic, 15 Amp (1 MIN) drawing
3.03300 3.03 I 2.55600 2.56 I 1.69700 1.70
1 EA Call
72235 Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Plastic, 20 Amp (1 MIN) drawing
3.03300 3.03 I 2.55600 2.56 I 1.69700 1.70
1 EA ✓
72245 Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Plastic, 25 Amp (1 MIN) drawing
3.03300 3.03 I 2.55600 2.56 I 1.69700 1.70
1 EA ✓
72255 Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Plastic, 30 Amp (1 MIN) drawing
3.03300 3.03 I 2.55600 2.56 I 1.69700 1.70
1 EA Call
72275 Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Plastic, 40 Amp (1 MIN) drawing
3.03300 3.03 I 2.55600 2.56 I 1.69700 1.70
1 EA Call

12V Auto Reset Plastic Circuit Breaker with Parallel Mounting Bracket

12V Circuit Breaker- Auto Reset

12V Auto-Reset Automotive Circuit Breakers – Reliable Overcurrent Protection for DC Applications

Automotive circuit breakers are essential for maintaining safety in DC applications by providing continuous overcurrent protection. These auto-reset circuit breakers are specifically designed to cycle repeatedly until the overcurrent source is found and corrected, delivering dependable performance. Del City offers a broad range of 12V circuit breakers in amperages from 5 to 50 amps to suit a variety of needs. These 12V canned breakers come in both metal and plastic housings, with options for brackets or without, making them versatile for different installations. Featuring a single pole and stud mount design, these type 1 circuit breakers are ideal for automotive use in trucks, buses, and additional applications like welding tools, power outlet strips, portable generators, and trolling motors. Engineered for durability, each circuit breaker includes nuts and washers for easy installation. Constructed with an internal composite alloy material, these breakers efficiently separate contacts in an overcurrent event and reset automatically once cooled. They operate within a temperature range of -10°F to 150°F and can be stored from -20°F to 200°F, proving reliability across diverse environments. Compatible with EATON/Bussmann models like 121A10-A2P-KA through 121A40-A2P-KA, these Del City circuit breakers provide trusted quality and interchangeable options for your electrical needs. Be aware that some products may incur tariff charges at checkout.

Products on this page may be affected by tariff charges at checkout.


  • Operating temperature: -10° F to 150° F.
  • Storage temperature: -20° F to 200° F.
  • Engineered for durability.
  • Breakers include nuts and washers.
  • Constructed with internal composite alloy material to deflect and separate the contacts when an overcurrent situation occurs and return to the run mode as it cools.
  • Auto Reset Stud Mount Circuit Breaker with Mounting Bracket, Metal, is comparable with EATON/Bussmann parts: 121A05-A2M-KA, 121A06-A2M-KA, 121A10-A2M-KA, 121A15-A2M-KA, 121A20-A2M-KA, 121A25-A2M-KA, 121A30-A2M-KA, 121A35-A2M-KA, 121A40-A2M-KA, 121A50-A2M-KA
  • Click here for the circuit breaker insulator.

Item Description Price
1+ I Ext. Price I 25+ Ext. Price I I 200+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
71122 Auto Reset Stud Mount Circuit Breaker with Parallel Bracket, Plastic, 10 Amp (1 MIN) drawing
3.03300 3.03 I 2.55600 2.56 I 1.69700 1.70
1 EA ✓
71124 Auto Reset Stud Mount Circuit Breaker with Parallel Bracket, Plastic, 15 Amp (1 MIN) drawing
3.03300 3.03 I 2.55600 2.56 I 1.69700 1.70
1 EA ✓
71126 Auto Reset Stud Mount Circuit Breaker with Parallel Bracket, Plastic, 20 Amp (1 MIN) drawing
3.03300 3.03 I 2.55600 2.56 I 1.69700 1.70
1 EA ✓
71128 Auto Reset Stud Mount Circuit Breaker with Parallel Bracket, Plastic, 25 Amp (1 MIN) drawing
3.03300 3.03 I 2.55600 2.56 I 1.69700 1.70
1 EA ✓
71130 Auto Reset Stud Mount Circuit Breaker with Parallel Bracket, Plastic, 30 Amp (1 MIN) drawing
3.03300 3.03 I 2.55600 2.56 I 1.69700 1.70
1 EA ✓
71132 Auto Reset Stud Mount Circuit Breaker with Parallel Bracket, Plastic, 40 Amp (1 MIN) drawing
3.03300 3.03 I 2.55600 2.56 I 1.69700 1.70
1 EA ✓
Prop65 Warning