Thomas & Betts RB14-250F Disconnects, 100 Pack

The RB14-250F is sized for 16-14 AWG wire, which is what the blue insulation color signals on a nylon-insulated terminal. The nylon sleeve accepts conductor insulation up to 0.162 inch outside diameter, so heavier-jacketed 14 AWG still seats in the barrel.

Rated 600V with a 105 degree C temperature rating, so it covers standard line-voltage control circuits, HVAC fan and blower connections, and panel wiring. It carries both UL and CSA, and the nylon insulation is UL 94 V-2 for flammability.

ERG4001 is the recommended tool. The RB14-250F also crimps correctly with the WT145C, WT2000, WT112M and ERG4003. The barrel is a brazed-seam serrated design, so it needs a proper insulated-terminal crimp die to develop full tensile strength, not pliers.

The RB14-250F is the female half only, so it slides onto an existing blade. To make a disconnect pair in a harness you need a mating male terminal, such as the 3M Scotchlok MVU10-250DMX male disconnect, which is vinyl insulated and also comes 100 to a pack.

The Thomas & Betts RB14-250F is a female 250 series disconnect sized for a .250 x .032 tab, so it mates to a male tab or a male disconnect terminal. Where the mating wire needs its own crimped terminal rather than a spade on a device, the 3M MVU10-250DMX Scotchlok male disconnect terminal is the matching half; it is vinyl insulated and supplied 100 to a pack. The RB14-250F itself is insulated nylon rather than vinyl, so the two differ in insulation material even though they pair mechanically.

They are not interchangeable. The Thomas & Betts RB14-250F is a crimp-on female 250 series disconnect for 16-14 AWG wire, with the conductor stripped and crimped into a barrel. The 3M Scotchlok 951X is a female T-tap disconnect for 22-18 AWG, designed to tap onto a run of wire rather than terminate a cut end, and its wire range is smaller. Use the 951X only where you intend to branch off an existing conductor in 22-18 AWG; use the RB14-250F to terminate a 16-14 AWG lead onto a .250 tab.

They ship 100 to a bag, and 100 is the order multiple, so quantities go up in hundreds rather than singles. Case quantity is 500. For MRO stock, 1000 pieces run about 3.13 lbs, so a few hundred adds almost nothing to a truck or a van.

The terminal body is brass with an electro tin-plated finish, which keeps contact resistance low and resists the surface corrosion that bare steel terminals develop in humid equipment rooms. Stock thickness is 0.03 inch. They are RoHS compliant under exemption 06.

No. The RB14-250F is a crimp-on female disconnect that terminates the end of a cut conductor. If you need to branch off a run without severing it, use a T-tap style connector instead, such as the 3M Scotchlok 951X female T-tap disconnect, which handles 22-18 AWG.

Nylon insulation is the tougher of the two for equipment work: it resists abrasion and nicking when terminals are pulled on and off blades repeatedly, and the RB14-250F carries a 105 degree C rating for use near motors and heating elements. Vinyl-insulated terminals, like the 3M Scotchlok male disconnects, are generally used where that abuse and heat exposure is lower.

Overall it measures 0.91 inch on the A dimension and 0.29 inch on the B dimension, which is a compact footprint for a 16-14 AWG quick disconnect. That matters when you are stacking several onto a fan switch or thermostat subbase with little depth behind it.

Yes. The Thomas & Betts RB14-250F uses insulated nylon over a brass barrel with an electro tin-plated finish, rated 600V at 105 degrees C with a UL 94 V-2 flammability rating. The 3M MVU10-250DMX male disconnect is vinyl insulated. Nylon and vinyl sleeves differ in how they behave under heat and abrasion, so match the insulation material to the ambient conditions of the enclosure or appliance you are wiring.