| MODEL DETAIL SPEC. | YSDR20-12 | YSDR20-24 | YSDR20-48 | 
| INPUT | NUMBER OF INPUT: | 2 Channels | 
| DC NORMAL VOLTAGE: | 12Vdc | 24Vdc | 48Vdc | 
| DC VOLTAGE RANGE: | 9~14Vdc | 19~29Vdc | 36~60Vdc | 
| RATED CURRENT: | 0~20A per input Continuous | 
| VOLTAGE DROP (Vin-Vout) (max.): | 0.25V | 
| PEAK CURRENT: | 0~30A per input  5Sec | 
| EFFICIENCY (Typ.): | 98% | 
| INPUT REVERSE CURRENT (max.): | 1mA | 
| INPUT REVERSE VOLTAGE (max.): | 40Vdc | 40Vdc | 65Vdc | 
| OUTPUT | RATED CURRENT: | 0~20A,Continuous | 
| PEAK CURRENT (max.): | 30A,5Sec | 
| CAPACITANCE(Typ.): | 320uF | 
| STANDBY POWER LOSSES(Typ.) : | 1.5W | 
| PROTECTION | OVERLOAD: | <30A,5Sec. No damage | 
| SHORT CIRCUIT: | <30A,5Sec. No damage | 
| FUNCTION | REDUNDANCY: | For 1+1 redundancy ,and support N+1 redundancy | 
| BOTH INPUTS VOLTAGE ALARM: | <8.5V or >14.7V (± 5% ) | <18V or >31V (± 5% ) | <34.2V or >63V (± 5% ) | 
| RELAY: | 30Vdc/1A resistive load | 
| LED STATUS DISPLAY: | Green LED OK | 
| ENVIRONMENT | COOLING: | Free air convection | 
| WORKING TEMP.: | -40 ~ +80 (Refer to “Derating Curve”) | 
| WORKING HUMIDITY: | 5 ~ 95% RH non-condensing | 
| STORAGE TEMP: | -40 ~ +85℃ | 
| TEMP. COEFFICIENT: | ±0.03%/ ℃(0 ~ 60℃   ) | 
| VIBRATION: | Component:10 ~ 500Hz, 5G 10min./1cycle, 60min. each along X, Y, Z axes; Mounting: Compliance to IEC61373 | 
| OPERATING ALTITUDE: | 5000 meters/OVC II | 
| SAFETY &EM | SAFETY STANDARDS: | IEC62368-1, UL62368-1, approved | 
| WITHSTAND VOLTAGE: | IP/OP – Chassis : 0.5KVac IP/OP- Relay : 0.5KVac Relay – Chassis : 0.5KVac | 
| ISOLATION RESISTANCE: | IP/OP – Chassis, IP/OP- Relay, Relay – Chassis:>100M Ohms / 500Vdc / 25 / 70% RH | 
| EMC EMISSION: | BS EN/EN55032(CISPR32)Test Level / Note | 
| EMC IMMUNITY: | BS EN/EN61000-4-2,3,4,5,6,8 | 
| COTHERS | MTBF: | 611.82K hrs min.    Telcordia SR-332 (Bellcore) ;     353.67K hrs min.   MIL-HDBK-217F (25 ℃ ) | 
| DIMENSION: | 32*125*100mm (W*H*D) | 
| PACKING: | 0.35Kg;28psc/10.8Kg/1.24CUFT |