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Manufacturer Resources
Product Specs
- Country Of Origin:
- United States (US)
- Insulation Material:
- Vinyl
- Product Subgroup:
- Disconnects
- Product Type:
- Vinyl Insulated Female Disconnect
- Standards:
- UL E66716
- Department:
- Electrical
- Product Group:
- Wire Termination
- Product Color:
- Blue
- Product Material:
- Brass
Sta-Kon RB257M – Frequently Asked Questions
1) What wire size does the Sta-Kon RB257M female disconnect take?
The RB257M is sized for 16-14 AWG stranded or solid wire, which is what the "No16-14" in the part description refers to. The blue insulation is the standard color code for that gauge range, so if you are sorting a bin of terminals by color, blue is your 16-14 barrel. For 22-18 AWG you need a red-insulated disconnect instead, and for 12-10 AWG a yellow one.
2) What is the RB257M disconnect made of, and will the insulation hold up to heat?
The contact body is brass with vinyl insulation over it. Brass gives you the spring tension that keeps the receptacle tight on the tab; vinyl is a general-purpose insulation good for ordinary control and appliance wiring, not for high-temperature engine-compartment or furnace-plenum work. Where heat is a factor, step up to a nylon-insulated or a fully uninsulated disconnect with separate high-temp sleeving.
3) Female versus male disconnect: which one goes on the wire I am running to a switch?
The RB257M is the female (receptacle) half, so it goes on the wire and slips over the male blade already on the switch, relay, or component. You only need the male disconnect if you are building both ends of a connection in a harness, in which case you pair a 250 male with this 250 female. Device terminals are almost always male tabs, which is why the female is the one tradespeople buy by the bagful.
4) Is the Sta-Kon RB257M made in the USA for a Buy American job?
Country of origin on the RB257M is the United States. That is the data point a government, school district, or federally funded procurement officer needs when a domestic-content clause is on the purchase order.
How fast can I get the Sta-Kon RB257M delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Sta-Kon RB257M come with a warranty?
Absolutely. The Sta-Kon RB257M is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Sta-Kon RB257M?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Sta-Kon RB257M from ZenSupply?
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and
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Our team is always ready to help you choose the right product for your project.