| Parameter | Value |
|---|---|
| Product Name | NDZ3X-50 |
| Brand Name | LAZZEN |
| Model Series | NDZ3X Series |
| Number of Pole | 2 |
| Load Polarity | Heteropolarity |
| Operating Voltage Range | DC12 – 750V |
| Rated Operating Current | 50A |
| Breaking Capacity | 1000A at DC320V |
| Contact Resistance | ≤0.5mΩ (at 50A) |
| Control Coil Voltage | DC12V / DC24V / DC48V |
| Auxiliary Contacts | Without / 1NO / 1NC / 1NC+1NO |
| Mechanical Life | 1,000,000 cycles, 1200 cycles/hour |
| Electrical Life | 50A: 3,000 cycles / 100A: 10 cycles |
| Weight | ≈210g |
| Application | Electric vehicle |
| Warranty | 1 Year |
| Certifications | CCC, CB, CE, TUV, UL |
The NDZ3X family covers 50A – 300A high voltage DC contactors for electric vehicles, battery systems and DC power distribution. NDZ3X-50 is the 50A entry model.
| Model Parameter | NDZ3X-50 | NDZ3X-50B | NDZ3X-100 | NDZ3X-100B | NDZ3X-150 | NDZ3X-150J | NDZ3X-200 | NDZ3X-250 | NDZ3X-300 | |
|---|---|---|---|---|---|---|---|---|---|---|
| High voltage DC contactor · Epoxy package · Heteropolarity · DC circuit | ||||||||||
| Rated current | 50A | 100A | 150A | 200A | 250A | 300A | ||||
| Agree thermal current of the free air | 150A | 300A | 500A | |||||||
| Rated voltage | DC450V / DC500V / DC750V / DC1000V | |||||||||
| Insulation voltage | ≥ 1000MΩ (DC1000V) | |||||||||
| Number of poles | Single pole | |||||||||
| Type of circuit | DC | |||||||||
| Mechanical life | 1,000,000 times · 1200 times/h | |||||||||
| Coil voltage | DC12V, DC24V, DC48V | DC12V, DC24V | ||||||||
| Maximum breaking current | DC320V 1000A, 1 time/once | DC320V 2000A, 1 time/once | ||||||||
| Short-circuit withstand current | 750A 30ms | 1500A 30ms | 2250A 30ms | 3000A 30ms | 3750A 30ms | 3750A 30ms | ||||
| Insulation resistance | ≥ 100MΩ (DC500V) | |||||||||
| Withstand voltage | AC2500V 60s | AC3500V 60s | ||||||||
| Rated control voltage Uc | DC12V/24V/48V; Pick-up 75%~110%Uc; Drop-out 10%~60%Uc | DC12V/24V; Pick-up DC9V~36V; Drop-out DC1.2V~7.2V (Cold state ≥ -40°C) | ||||||||
| Maximum pull-in current (20°C) | ≤ 0.5A | ≤ 3.5A | ||||||||
| Retention power consumption (20°C, rated voltage) | ≤ 6W | Keep 4.5W, Start 45W | ≤ 6W | ≤ 3.6W/3.6VA | ||||||
| Pull-in/discharge time (rated voltage) | ≤ 35ms / 15ms | ≤ 35ms / 20ms | ||||||||
| Auxiliary contact type | Without auxiliary contact, 1NO, 1NC, 1NC+1NO Note 2: NDZ3X-50/100 do not have auxiliary contact | |||||||||
| Auxiliary contact current | 2A/DC30V, 3A/AC125V | |||||||||
| Minimum capacity of the auxiliary contact connecting | 8V 100mA | |||||||||
Certified to CCC, CB, CE, TUV and UL standards — ready for export projects in Europe, North America and beyond.
| Advantage | Benefit for Your Application |
|---|---|
| ✅ Compact 2-Pole Design | Two-pole heteropolarity contact arrangement in a lightweight 210g package — saves space in EV battery compartments. |
| ✅ 750V High Voltage Rating | Operates up to DC750V — suitable for modern 400V and 800V EV battery architectures. |
| ✅ 1kA Breaking Capacity | Safely interrupts fault currents up to 1000A at DC320V, protecting battery packs and drive inverters. |
| ✅ Multi-Voltage Coil Options | Available in DC12V, DC24V and DC48V coil versions — drop-in fit for 12V/24V/48V vehicle electrical systems. |
| ✅ 1M Mechanical Cycles | 1,000,000-cycle mechanical life at 1200 cycles/hour — built for years of high-frequency switching duty. |
| ✅ Global Certifications | CCC, CB, CE, TUV and UL — supports export projects worldwide with 1-year warranty. |
Main contactor · Pre-charge circuit · Auxiliary disconnect for EVs and hybrid vehicles
Battery pack switching · BMS protection · ESS rack disconnect for residential and commercial storage
DC switchgear · Solar combiner boxes · DC microgrid isolation and protection
EV charging stations · DC fast charger isolation · UPS bypass circuits
