Emergency Stop Switches / E-Stop Switches E-STOP SWITCH MAINT PUSH/PULL
Research Notes
1. What this is
1301940172 ("Molex 1301940172") is catalogued as a emergency-stop device from Molex.
2. What we know
- Manufacturer: Molex
- Category: emergency-stop device
- Part number / name: 1301940172 — Molex 1301940172
- Molex — electronic connectors and interconnect (a Molex part is usually a connector)
3. How to identify / order the exact part
The full specifications for this part are not machine-decodable from the data we hold. To confirm the exact configuration (contacts, rating, colour, mounting, protocol), search the Molex catalog for this part number on the manufacturer site or a distributor (DigiKey / Mouser / RS).
4. Data-quality note
This page is generated from the catalogued manufacturer, category, and product name. Per our keep-and-document policy we publish a page for every part we hold and state plainly what is known versus what needs verification, rather than deleting the row or inventing specs. Flagged needs-verification.
5. Sources
- Molex product catalog — search "1301940172" / "Molex 1301940172"
1 source
- Molex 1301940172 — distributor/catalog
Specifications
|
Device class
|
emergency-stop
|
|
Enriched by
|
generic-fallback-2026-08-12
|
|
Lead time
|
0 Days
|
|
Mouser part number
|
538-1301940172
|
|
Pn status
|
needs-verification
|
|
Rohs status
|
RoHS Compliant
|
Installation Quick Reference
Panel cutout: 22mm. Mount with the yellow backing plate visible (required by EN/ISO 13850).
Wiring: Wire NC contacts in series with the safety relay input channels. Use dual-channel wiring for SIL 3 / PLe applications. Never wire directly to a motor contactor.
Testing: Press the e-stop and verify the machine stops within the required time. Test the reset mechanism. Repeat monthly per EN/ISO 13850.
Dimensions
Troubleshooting
E-stop won't reset (twist/pull doesn't release)
Check for debris in the mechanism. For twist-release: turn clockwise 45-90 degrees. For push-pull: pull straight out firmly. If the mechanism is stuck, the internal latch may be damaged — replace the entire head assembly.
Machine doesn't stop when e-stop is pressed
Critical safety issue. Immediately lock out the machine. Check wiring — NC contacts must be in series with the safety relay. Verify the safety relay is functioning. A broken wire in an NC circuit should cause a stop, so check for a wiring bypass.
Safety relay faults after e-stop reset
The safety relay detects a cross-fault between the two monitoring channels. Check that both NC contacts on the e-stop are switching simultaneously. One contact may be welded closed — replace the contact block.
Where to Buy
Price range
$210.79 — $210.79
across 1 distributors
Quick Specs
- Device class
- emergency-stop
- Enriched by
- generic-fallback-2026-08-12
- Lead time
- 0 Days
- Mouser part number
- 538-1301940172
- Pn status
- needs-verification
