SR20 ~ SR110 is a series of switch power supplies, with an output voltage range of 2V to 48V and a maximum output current of 7A.
The SR series from Lambda comprises a range of single‑output power supplies (20 W ~ 660 W) covering output voltages from 2 V to 48 V. The leaflet lists the available models (SR20, SR35, SR60, SR110, SR230, SR330, SR660) and their nominal output currents and powers.
Key features include a wide input voltage range (85‑132 VAC or 170‑265 VAC), tight line and load regulation (0.4 %), low ripple, various cooling methods, and compliance with UL1950, CSA950 and EN60950 safety standards. Mechanical drawings show mounting hole patterns and dimensions for each model.
| Input voltage range | 85 ~ 132 VAC / 170 ~ 265 VAC |
|---|---|
| Line regulation | 0.4 % |
| Load regulation | 0.4 % |
| Maximum ripple (2 V‑6 V output) | 50 mV |
| Cooling method | Convection for SR20‑SR110; forced‑air with internal fan for SR230‑SR660 |
| Operating ambient temperature | -20 °C ~ +71 °C |
| Withstand voltage (input‑output) | 3.75 kVAC |
| Safety certifications | UL1950, CSA950, EN60950 |
| EMI compliance | VCCl‑class 1 and FCC class A |
The SR series accepts an input voltage of 85 ~ 132 VAC or 170 ~ 265 VAC.
The units operate from –20 °C up to +71 °C, with forced‑air cooling for the higher‑power models.
It is approved to UL1950, CSA950 and EN60950 safety standards.
SR20‑SR110 use convection cooling, while SR230‑SR330‑SR660 use forced‑air cooling with an internal fan.