Product Features
- Ceramic brazing sealing technology; sealed chamber meets IP67 protection rating.
- Hydrogen-filled chamber effectively prevents oxidation of internal metallic components.
- 350A continuous current carrying capacity
- 1 set of bridge-type normally open (SPST-NO) contacts; non-polarized main contacts.
- Widely applicable to construction machinery, energy storage systems (ESS), EV charging stations, and other electrical sectors.
Model Description
Main Technical Specifications
| Parameters | Specifications |
| Contact Form | 1H (SPST-NO) |
| Rated Load Current | 350A |
| Min. Load (Resistive) | 1A 12VDC |
| Max. Breaking Current | 2000A (1000V DC; 50ms; 1 op) 1000A (1500V DC; 50ms; 1 op) |
| Max. Switching Voltage | 1500VDC |
| Contact Resistance (Initial) | ≤0.3mΩ@350A (Initial) |
| Overload Current Capability (Conductor size XX mm²; 85°C) | 350A cont. 400A 7000s 1200A 40s 2400A 12s |
General Electrical Characteristics
| Parameters | Specifications |
| Insulation Resistance (Between Open Main Contacts) | ≥1000MΩ(@1000VDC) |
| Insulation Resistance (Between Main Contacts and Coil) | ≥1000MΩ(@1000VDC) |
| Insulation Resistance (Between Main and Auxiliary Contacts) | ≥1000MΩ(@1000VDC) |
| Dielectric Withstanding Voltage (Between Open Main Contacts) | ≥4000V AC (1min; leakage current ≤1mA) |
| Dielectric Withstanding Voltage (Between Main Contacts and Coil) | ≥4000V AC (1min; leakage current ≤1mA) |
| Dielectric Withstanding Voltage (Between Main and Aux Contacts) | ≥4000V AC (1min; leakage current ≤1mA) |
| Operate Time (At rated coil voltage, 23°C) | ≤30ms |
| Release Time (At rated coil voltage, 23°C) | ≤10ms |
| Bounce Time (At rated coil voltage, 23°C) | ≤5ms |
Auxiliary Contact Specifications
| Parameters | Specifications |
| Contact Form | 1H(SPST-NO) |
| Rated Load | 100mA 6V DC |
| Min. Load | 3mA 6V DC |
| Contact Resistance | ≤150mΩ@1A |
Shock & Vibration Resistance
| Parameters | Specifications |
| Shock – Stability (Disconnected) | 1/2 sine，11ms，20G |
| Shock – Stability (Closed state) | 1/2 sine，11ms，20G |
| Shock – withstand | 1/2 sine，6ms，50G |
| Random vibration | 10Hz~2000Hz，57.9m/s² |
Operating Conditions
| Parameters | Specifications |
| Ambient Temp | -40℃~+85℃ |
| Humidity | 5%~85%RH |
Endurance
| Parameters | Specifications |
| Electrical Endurance (Resistive) | Switching |
| 100A/1500V DC 6000 (ops) | |
| 350A/1000V DC 1000 (ops) | |
| Breaking | |
| 250A/1000V DC 2000 (ops) | |
| 150A/1500V DC 3000 (ops) | |
| 350A/1500V DC 500 (ops) | |
| Mechanical Endurance | 20W ops |
Coil Characteristics (@23°C)
| Rated Voltage V DC | Max. Operating Voltage V DC | Pick-up Voltage V DC | Drop-out Voltage V DC | Power Consumption W |
| 12 | 16 | ≤9 | ≥1 | Inrush：50 |
| Holding：5 | ||||
| 24 | 32 | ≤18 | ≥2 | Inrush：50 |
| Holding：5 |
Overload Capability Curve
Note:
1. Ambient temperature: 85°C; Conductor cross-section ≥120 mm².
2. Maximum curve temperature limit is 130°C, representing the maximum capacity for long-term continuous cycles.
3. Under short-time operation at current ≥2500 A, contact welding may occur, but without fire or explosion hazards.
4. Curve data is for design reference only; final component sizing and short-circuit fuse coordination must be verified through actual testing.
Wiring diagram
External dimensions (mm)
ASFEP350/口-口HA-ACA
Note: Undimensioned tolerances for product outline dimensions:
| Size (mm) | ＜10 | 10~50 | ＞50 |
| Tolerance (mm) | ±0.3 | ±0.5 | ±0.8 |
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