NewTrend · DC emergency power-off switch
Product overview
The NewTrend JK300A is a manually operated emergency power-off switch rated 300A at a maximum of 80V DC. Its bridge-contact mechanism, red operating handle and M8 power terminals provide emergency battery isolation for electric forklifts, industrial electric vehicles and battery-powered machinery.
Technical selection summary
| Model | JK300A |
|---|---|
| Rated current | 300A |
| Maximum DC voltage | 80V DC |
| Operation | Manual |
| Contact construction | One bridge-contact pair |
| Ingress protection | IP50 |
Electrical and mechanical performance
| Instantaneous maxi (closing) current | 1200A, ≤1s |
|---|---|
| Insulation resistance(MΩ) | DC500V, ≥100 |
| Dielectric withstand voltage | 1500V,p.f. 1min, no breakdown |
| Voltage drop on contacts(mV) | ≤80 (at 100A) |
| Electric cycles (104) | ≥1 |
| Mechanical cycles (104) | ≥2 |
| Disconnect thrust F1(N) | 20.0≤F1≤50.0 |
| Temperature rise on outgoing terminal | ≤65 |
| Closed pull force F2(N) | 20.0≤F2≤100 |
| Material of contact | AgCuO(10)/Cu |
| Normal closing time (ms) | ≤100 |
| Working duty | Continuous operating duty |
| Normal disconnection time (ms) | ≤50 |
| Torque of outgoing terminal on contact M8(N.m) | 8.5 N.m maximum |
| Mounting methods | Freely |
| Working temperature | (-25~+55)°C |
| Vibration | Sine shock: 2.5g, (5~50) Hz |
| Mounting altitude | ≤2Km |
| Impact | 50g,11ms(Half sine) |
Typical applications
- Emergency DC power isolation in electric forklifts
- Emergency power-off in battery-powered industrial vehicles
- Manual isolation of DC power circuits in industrial machinery
Download complete NewTrend JK300A catalogue (PDF)
Product reference images and drawings
JK300A catalogue – Product, applications, model selection and wiring
JK300A catalogue – Full technical parameters and mounting dimensions
