Terminals > Butt-Connectors > Heat-Shrink-Butt-Connectors

Thermal Indicator Lead-Free, Heat Shrink & Solder

Thermal Indicator Lead-Free, Heat Shrink & Solder

Thermal Indicator Lead-Free, Heat Shrink & Solder Thermal Indicator Lead-Free, Heat Shrink & Solder Thermal Indicator Lead-Free, Heat Shrink & Solder

Heat Shrink Thermal Indicator Lead-Free Solder Butt Connectors: Reliable, Visual Solder Termination at Del City

Heat Shrink Thermal Indicator Lead-Free Solder Butt Connectors are the perfect solution for securely mating, connecting, or terminating single wires in a wide range of automotive, industrial, and general electrical applications. These innovative connectors feature a red thermal indicator, providing an additional visual cue to ensure proper heating during installation. The red indicator is designed to disappear once the solder sleeve has fully transformed and flowed into the wire strands, signaling a complete and strong solder joint. This feature helps prevent the most common mistake in soldering—underheating—which can lead to a cold solder joint and inferior connection.

The lead-free solder used in these connectors not only enhances safety but also provides superior tensile strength and conductivity. The no-clean flux on the solder sleeve helps clean metals during the process, ensuring a high-quality solder termination. These connectors are ideal for use in harsh environments, as they are designed to resist corrosion and other environmental debris.

The heat shrink insulation is adhesive-lined for an additional layer of protection and is translucent, allowing for easy visual inspection of the connection. Additionally, each connector is printed with gauge sizes to simplify the installation process. The heat shrink provides significantly greater pull strength compared to vinyl or nylon alternatives, making these connectors a reliable choice for applications requiring durability and stability.

These connectors are RoHS Compliant and feature an ElektraLink Lead-Free Red Thermal Indicator with a flux coating and thermochromic dye that changes from red to clear upon proper soldering. The shrink temperature is 212°F (100°C), while the melting temperature is 138°C, with a continuous operating range from -67°F (-55°C) to 257°F (125°C).


  • ElektraLink-Lead Free Red Thermal Indicator: Flux Coating with Thermochromic Dye; Red to Clear. 42SN / 58BI ALLOY. RoHS Compliant.
  • Red thermal indicator provides an additional visual cue when solder has transformed and flowed into wire strands.
  • “No-clean” flux on solder sleeve cleans metals & provides quality solder termination
  • Translucent heat shrink is adhesive-lined and printed with gauge sizes.
  • Shrink Temperature: 212°F (100°C). Melting Temperature: 138°C
  • Continuous Operating Temperature: -67°F (-55°C) TO 257°F (125°C)
  • Click here for heating tools.
  • Click here for Heat Shrink & Solder Butt Connector Data Sheet

Item Description Price
1+ I Ext. Price I 100+ Ext. Price I I 1000+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
966605TI NSPA ETI5-20, Lead-Free Thermal Indicator Heat Shrink & Solder Butt Connector, Clear, 24-22 Ga (10 MIN) drawing
0.80700 8.07 I 0.67200 6.72 I 0.57600 5.76
10 EA ✓
966615TI NSPA ETI5-16, Lead-Free Thermal Indicator Heat Shrink & Solder Butt Connector, Red, 22-18 Ga (10 MIN) drawing
0.92900 9.29 I 0.77400 7.74 I 0.66300 6.63
10 EA ✓
966625TI NSPA ETI5-14, Lead-Free Thermal Indicator Heat Shrink & Solder Butt Connector, Blue, 16-14 Ga (10 MIN) drawing
0.92900 9.29 I 0.77400 7.74 I 0.66300 6.63
10 EA ✓
966635TI NSPA ETI5-10, Lead-Free Thermal Indicator Heat Shrink & Solder Butt Connector, Yellow, 12-10 Ga (10 MIN) drawing
1.06400 10.64 I 0.88700 8.87 I 0.76 7.60
10 EA ✓

Lead-Free Heat Shrink & Solder Butt Connectors

Lead-Free Heat Shrink Connectors

Lead-Free Heat Shrink Connectors Lead-Free Butt Connectors Lead-Free Butt Connectors Lead-Free Heat Shrink

Heat Shrink Lead-Free Solder Butt Connectors: Reliable, Strong, and RoHS Compliant at Del City

Heat shrink lead-free solder butt connectors are versatile terminals designed to mate, connect, or terminate single wires in various automotive, industrial, and other electrical applications. These connectors offer the added advantage of soldering the wire to the terminal, significantly improving the reliability of the connection and ensuring long-lasting conductivity. The lead-free solder used in these butt splices is specially formulated with greater surface tension, providing extra strength and durability compared to traditional solders.

The translucent heat shrink insulation is adhesive-lined, creating a secure, waterproof seal while allowing easy visual inspection of the connection. Each connector is also printed with gauge sizes, making installation simple and ensuring the right fit for your application. The heat shrink insulation offers superior pull strength, outperforming vinyl or nylon alternatives in demanding environments.

These lead-free solder butt connectors are also RoHS compliant, making them an environmentally friendly option that complies with global safety standards. They are ideal for use in applications that require corrosion-resistant, high-strength connections and are designed to perform reliably in challenging conditions.


  • New LEAD-FREE Solder has greater surface tension for added strength.
  • Translucent heat shrink is adhesive-lined and printed with gauge sizes.
  • Heat shrink insulated terminals have a greater pull strength than vinyl or nylon.
  • Click here for heating tools.
  • RoHS Compliant.

Item Description Price
1+ I Ext. Price I 100+ Ext. Price I I 1000+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
966605LF NSPA ELF5-20, Lead-Free Heat Shrink & Solder Butt Connector, Clear, 24-22 Ga (10 MIN)
0.73500 7.35 I 0.59 5.90 I 0.50300 5.03
10 EA ✓
966615LF NSPA ELF5-16, Lead-Free Heat Shrink & Solder Butt Connector, Red, 22-18 Ga (10 MIN)
0.83800 8.38 I 0.68 6.80 I 0.57900 5.79
10 EA ✓
966625LF NSPA ELF5-14, Lead-Free Heat Shrink & Solder Butt Connector, Blue, 16-14 Ga (10 MIN)
0.83800 8.38 I 0.68 6.80 I 0.57900 5.79
10 EA ✓
966635LF NSPA ELF5-10, Lead-Free Heat Shrink & Solder Butt Connector, Yellow, 12-10 Ga (10 MIN)
0.97300 9.73 I 0.78700 7.87 I 0.66300 6.63
10 EA ✓
966645LF NSPA ELF5-08, Lead-Free Heat Shrink & Solder Butt Connector, Red, 8 Ga (10 MIN)
1.89400 18.94 I 1.50100 15.01 I 1.47 14.70
10 EA ✓
Prop65 Warning