Description
A working 24 V supply sold as the complete mains-to-rail chain it was actually tested as - mains inlet, correct-rated fuse and PSU together - not a loose board of unknown provenance.
Bench report
- Functional
- Tested working as the bundled assembly you see in the photographs. The 2026-09-15 pump test ran mains through the IEC entry module, through this supply, to its 24 V output, and produced strong suction from the degasser pump. A sagging or dead rail would have shown up there as a weak pump. It did not. Headroom is ample: 650 mA available against the 210 mA the pump draws.
- Cosmetic
- Clean, open-frame board. No burnt or discoloured components, no bulging or leaking capacitors, no corrosion, no prior repair or rework. The rating label is crisp and fully legible in the photographs. The IEC inlet module and its fuse drawer are intact, with normal light handling marks.
- Tested
- Ran mains to IEC inlet to PSU to 24 V rail and drove a vacuum pump to strong suction (2026-09-15). · Rating label read and photographed: ZWS15-24/J, INPUT 100-240VAC ~0.45A 50/60Hz, OUTPUT 24V 0.65A (0.78A peak), TDK-Lambda, Made in China. · PSU on-board input fuse F1 (AC250V T2AH) present. · Module mains fuse in the IEC inlet drawer is present and its T500mA 250V rating was checked on the bench against the source module's own chassis ID plate - no over-rated substitute had been fitted.
- Not tested
- No meter was put on the output. Rail voltage, regulation, ripple and hold-up are NOT measured. · Not load-tested beyond the roughly 210 mA the pump drew - the full 0.65 A rating is the manufacturer's, not a figure verified here. · Mains fuse filaments are VISUALLY intact only. They were NOT continuity tested. · Efficiency, thermal behaviour and long-run stability were not assessed. · No hipot, leakage or safety-compliance testing of any kind.
Specifications
- Manufacturer
- TDK-Lambda
- Full model designation
- ZWS15-24/J
- Type
- Open-frame switching AC-DC power supply, 15 W
- Input (label)
- 100-240 VAC ~0.45 A, 50/60 Hz
- Output (label)
- 24 V DC 0.65 A, 0.78 A peak
- PSU input fuse
- F1, AC250V T2AH, present
- Module mains fuse
- Present in the IEC inlet drawer, T500mA 250V rating checked against the source chassis ID plate, filaments visually intact - not continuity tested
- Transformer marking
- A15405C / MZ0818
- Bare PCB marking
- PWB-654D, Densei-Lambda (TDK-Lambda's pre-2008 name), CEM-3 94V-0
- Pulled from
- Agilent 1200 Series G1379B Micro Vacuum Degasser, S/N JP82010382
- Condition
- Used - tested working as the bundled assembly; output not metered