Wholesale Custom MK5-9525 Pluggable Terminal Block-Plugs, Spring Plug-in, Test Hole, Anti-Misplacement, High Temp Resistance

Basically it's a pluggable terminal block with a spring-clamp mechanism and a test hole built in — the MK5-9525 handles up to 24 connections (02 to 24 poles depending on how you order), and the insulating material is PA with a V0 flammability rating per UL 94.

Mostly you'll see these on PCBs in industiral control cabinets or automotive application where you don't want to screw around with loose wires. parallel incoming line design plus the test hole means you can check connections without yanking teh whole plug out, but it's not for high-vibration environments — the spring connection can fatigue over time if you're cycling it daily.

Stripping length is 10mm, max flexible conductor it takes is 1.5mm², and the screw-and-spring connection means it's a tight hold rather than a purely spring-loaded one. We've had buyers who prefer the 02-12 pole configurations for smaller builds since they're easier to handle on the bench (the 24-pole version gets a bit unwieldy without a fixture).

Injection molded construction gives decent high-temp resistnce, but don't expect it to survive soldering iron abuse right at the contacts — we usually have stock on most pole counts, but confirm lead time if you need 500+ units or so.

What it does well is prevent misconnection — the plug and socket are keyed so you really have to try to jam it in wrong. Most buyers we deal with just want the COA and reliable batch-to-batch consistency.

You'll get them in standdard anti-static trays if you're ordering under 1000 pieces, bulk bagged above that, and the UL certifcation is active — our company can provide the cert numbers on request but honestly nobody bothers checking for the smaller orders.