518APH-12 Magnetic Switch For Marine Engines And Heavy Duty Diesel Generators And Distributor Ignition Systems, Swichgage Or NC Contacts Closed Loop Wiring, 10 Amp Coil, Rugged Electrical Switch For Industrial Marine Applications

518APH-12 Magnetic Switch for Marine Engines and Generators
✔️ 12V coil, 10A rating, closed-loop wiring for Swichgage/NC

The 518APH-12 is a rugged magnetic switch designed for marine engines and heavy-duty diesel generators. It supports Swichgage and NC contacts wired in a closed loop, triggering shutdowns when a circuit opens or Swichgage closes. Typical use includes distributor ignition systems and engine protection circuits aboard ships and offshore generators.

✅ Contact Rating: 10 A, Coil Resistance: 339 Ω (12 V) / 678 Ω (24 V)
✅ Closed-loop wiring for Swichgage and NC contacts in series
✅ NCH/NOH outputs; latched when energized
✅ Operating temperature -40 to 176 °F (-40 to 80 °C)
✅ Includes 14 A fuse; 12 V model uses manual reset and energize-to-latch

💡 What is a closed-loop magnetic switch used for in marine engines and heavy-duty generators?

This handy device lets Swichgage and NC contacts be wired in series for automatic shutdowns when a fault is detected.

- closed-loop wiring enhances engine protection by triggering on fault conditions
- supports distributor ignition systems and diesel engines aboard ships or generators
- 10 A rating and 12 V coil provide clear fault signaling
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