3M MH10BCX Heat Shrink Butt Connector 12-10 Awg Yellow

Product Description

The 3M MH10BCX is a heat shrink insulated butt connector designed for making reliable, weather-resistant wire splices in electrical wiring applications. Built with an electrolytic tough pitch (ETP) copper barrel and tin plating, this connector delivers solid conductivity and long-term corrosion resistance. The adhesive-lined polyolefin heat shrink tubing creates a sealed connection that resists water and salt intrusion once crimped and shrunk. It is rated at 600 volts for building wiring and 1000 volts for signs, fixtures, and luminaires, with a maximum temperature rating of 221 degrees F. Electricians and electrical contractors install this connector where a sealed, durable splice is required.

This connector is suited for residential and commercial electrical work, sign wiring, fixture and luminaire installations, and any application where moisture or salt exposure is a concern. It accepts 12 to 10 AWG conductors and is sold in a 25-piece carton, making it appropriate for both service calls and new construction work. The yellow color coding corresponds to the 12-10 AWG wire size range, allowing fast identification during installation.

Key Features

• Seamless ETP copper barrel with tin plating for corrosion resistance
• Adhesive-lined polyolefin heat shrink insulation seals against water and salt
• Built-in wire stop ensures correct conductor positioning before crimping
• Dual voltage rating: 600V for building wiring, 1000V for signs and fixtures
• Yellow color coding identifies 12-10 AWG conductor range at a glance
• UL 486-C and CSA 22.2 listed for code-compliant installations

Compatibility

Designed as a standard heat shrink butt splice connector for 12 to 10 AWG copper conductors in building wiring, sign, fixture, and luminaire applications.

Installation Notes

Installation should be performed by a qualified electrician in accordance with the NEC and applicable local codes. De-energize and lock out the circuit before making any wire connections. Use a calibrated ratchet crimping tool appropriate for the connector size, then apply controlled heat evenly around the barrel until the heat shrink tubing fully contracts and adhesive flows from both ends to confirm a complete seal. Do not use an open flame to shrink the tubing.

Technical Specifications

• Type: Butt Connector
• Conductor Size: 12 to 10 AWG
• Voltage Rating: 600V (Building Wiring), 1000V (Signs/Fixtures/Luminaires)
• Temperature Rating: 221 degrees F (105 degrees C)
• Insulation Type: Heat Shrink, Adhesive-Lined Polyolefin
• Barrel Material: ETP Copper, Tin Plated
• Barrel Style: Seamless
• Barrel Length: 0.38 inches
• Barrel Inner Diameter: 0.142 inches
• Overall Length: 1.5 inches
• Thickness: 0.031 inches
• Color: Yellow
• Package Quantity: 25 per Carton, 125 per Case
• Package Weight: 1.1 pounds
• Approvals: UL 486-C, CSA 22.2
• Country of Origin: US

Standard Information

• Brand: 3M
• Manufacturer Part Number: MH10BCX