YongNeng builds this high voltage dc relay as a 250 A contactor for DC power paths, with a rated load voltage window of 12 VDC to 1,000 VDC. The contact chamber is sealed and filled with high-purity nitrogen, and a neodymium-iron-boron permanent magnet drives the arc away from the contact faces — that combination is what lets a compact body switch heavy DC loads without a bulky arc chute. Small overall size with high switching power means the unit can sit on the busbar assembly instead of in its own enclosure, which matters when vertical space above a battery pack or inside a charger is tight.
The coil comes in 12, 24 and 48 VDC versions, so the same dc contactor relay can be driven from a low-voltage control rail without adding an interface stage. A built-in energy-saving board cuts the hold current once the contacts have closed, which lowers heat inside the enclosure and lets a smaller control supply feed the coil. Built-in directional voltage control keeps pick-up behaviour consistent across the rated window, so switching does not drift between a partly discharged and a fully charged supply. Coil leads are supplied at 300 mm as standard; tell us the cable length and connector you need and we will build the coil end to suit.
YongNeng is a relay manufacturer supplying signal relays, latching relays and high-power relays, together with a high-voltage DC contactor line that runs from 16A up to 400A. Because our range covers everything from light switching duty to heavy DC loads, buyers can consolidate several switching positions with one supplier instead of sourcing each rating separately. Power relays are offered in sealed and open construction, and contact wiring is arranged for straightforward installation. Tell us the current rating, switching duty and mounting space your project needs, and we will help you match the right relay or contactor to your build.
| CONTACT DATA | |
| Model |
YV250 |
| Contact Arrangement |
1A |
| Contact Resistance |
<=0.5 mΩ |
| Current Withstand | 300A/120min，400A/20min ，600A30S，1000A/10S，1500A/0.6S |
| Contact Rating ( Res.Load ) | 250A |
| Max. Switching Current | 2500A/320VDC |
| Rated load Voltage | 12-1000VDC |
| Max. Switching Power | 800KW |
| Mechanical endurance | 2x105次 OPS |
| Electrical endurance | 1x104次 OPS(250A 450VDC), 3x103次OPS(250A 750VDC), 1x103次OPS(150A 1000VDC) |
| Auxiliary Contact Data | |
|
Max.Current |
2A/30VDC |
|
Min.Current |
100mA/8VDC |
|
Contact Resistance |
<=100mΩ |
| CHARACTERISTICS | |
|
Rated Voltage(VDC) |
12/24/48 |
|
Action Time (ms) |
<=30 |
| Release Time (ms) | <=10 |
| Rebound Time(ms) | <=5 |
| Insulation Resistance | Between Open Contacts:1,000MΩ(1000VDC) Between Coil& Contacts:1,000MΩ(1000VDC) |
| Dielectric Strength | Between Open Contacts : 2,500VAC, 50/60Hz 1 min. |
| Between Coil & Contacts: 2,500VAC, 50/60Hz 1 min | |
| Coil End Lead Out Form | Leading 300mm / customized. |
| Ambient Temperature | -40℃~+85℃ ( No condensation) |
| Unit Weight | without auxiliary contact: Approx. 330g with auxiliary contact: Approx. 380g |
| Impact Stability | 196 m/s2 |
| Impact Strength | 490 m/s2 |
For this high voltage dc relay, 250 A is the contact rating for a resistive load at the rated load voltage, so it is the number to design steady-state current around. The higher figures in the specification are short-duration withstand values — useful margin for surges rather than a working rating. Loads that pull a heavy inrush, such as motor or capacitive loads, should be checked against the switching capability rather than the continuous figure alone.
The 250 A rating is quoted for a resistive load. Motor, capacitive and lamp loads draw a much higher inrush for a short time, so a high current relay on those duties is usually chosen with headroom against the peak rather than the running current. Tell us the load type and the worst-case surge and we will confirm whether this model has enough margin or whether a higher rating in the range is the safer step.
1A means a single contact set that is normally open: the DC path stays open when the coil is not energised and closes when the coil is powered. That is the usual arrangement for a dc contactor relay used as a pre-charge or main switch, because the safe state with no control power is an open circuit. If your design needs a normally closed or changeover function, this model is not the right one — talk to us about the alternatives.
Order it when a controller, PLC or status lamp needs to know that the main contacts have actually closed. The auxiliary contact switches up to 2 A at 30 VDC and has a minimum load of 100 mA at 8 VDC, so check that your signal load sits inside that window. If you only need the power path switched, the version without the auxiliary contact is lighter and simpler to wire.
A contactor of this type is built for higher-current DC power switching, while a standard relay usually handles lower-power control or signal duty. The difference shows up in the contact chamber and arc handling rather than in the coil. If you are unsure which side of that line your application sits on, send us the load details — as a relay supplier we can tell you whether a power relay or a contactor is the better fit.
Compare your continuous current against the 250 A rating at your working voltage. If normal operation stays at or below it and the peaks fit inside the switching figures, this model is the right step. If the continuous current runs higher, move up to the 300 A or 400 A version — as a relay manufacturer we build the range from 30 A to 400 A, so the change is a step in rating rather than a change of source.
