KJD17D Emergency Stop Push Button (rated 250V 16A) is a heavy-duty electromagnetic pushbutton switch, commonly used as a No-Volt Release (NVR) or safety/emergency stop switch in industrial and power tool applications.
Key Features and Purpose
- Electromagnetic design — It includes a no-volt-release (NVR) mechanism. This means the switch automatically disconnects (trips to OFF) if power is lost or voltage drops significantly, preventing unexpected restarts when power returns — a critical safety feature to avoid accidents on machines like bench grinders, drill presses, belt sanders, lathes, woodworking tools, or other electric machine tools.
- Emergency stop function — Typically features a prominent red mushroom-head push button for quick activation (press to stop/emergency off). Many versions include a twist-to-release or pull-to-reset mechanism, and some have a lock-on stop button for added security.
- Rated specifications — 250V AC, 16A current rating (suitable for single-phase tools/motors up to roughly 2-3 HP depending on exact model and voltage; often listed around 2HP at 220-240V in related series).
- Contact configuration — Usually DPST (double pole, single throw) or similar, with normally open/normally closed contacts for reliable cut-off of both live and neutral lines.
- Other common traits — Often waterproof/dust-resistant (e.g., IP54 equivalent in similar models), robust ABS housing, silver contacts for durability, and panel or surface mount with fixing holes.
This switch is manufactured by companies like KEDU (a common brand for these Chinese-made industrial switches), and similar variants appear under KJD17 series (e.g., KJD17D-2, KJD17B). It's widely sold on platforms like Amazon, eBay, AliExpress, and Walmart as a replacement part for tools and equipment.
Typical Applications
- Power tools and stationary machines requiring fail-safe power interruption.
- Workshops, garages, or industrial setups where safety compliance (e.g., preventing auto-start after blackout) is important.
If you're looking to purchase, install, wire, troubleshoot, or find a datasheet for a specific variant (e.g., exact pinout or dimensions), provide more details — such as the full model suffix (like KJD17D-2), what machine it's for, or if you need help with alternatives!
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