ENMG / AC POWER CONTROLLERS
SO
Analog phase-angle AC power controllers
Optically isolated phase-angle controllers for continuously adjusting resistive AC heating loads using a 4–20 mA signal.
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Specifications & selection.
- 35, 50, 75, 95 and 125 A selection classes.
- 90–265 VAC and 200–480 VAC load-voltage versions.
- No external auxiliary supply; green status LED.
| Load-current class | 90–265 VAC | 200–480 VAC |
|---|---|---|
| 35 A | SO443420 | SO463420 |
| 50 A | SO445420 | SO465420 |
| 75 A | SO447420 | SO467420 |
| 95 A | SO448420 | SO468420 |
| 125 A | SO449420 | SO469420 |
| Item | Value |
|---|---|
| Control input | 4–20 mA |
| Adaptive supply frequency | 40–70 Hz |
| Input-output isolation | 2500 Vrms stated as typical; test duration not given |
| On-state drop | ≤1.6 Vrms described as typical |
| Ambient / humidity | −40 to +70 °C / 5–85% RH; no condensation or icing |
| Protection | IP20 with terminal cover |
| Minimum load / outline / mass | Exact model-specific data required |
| Marking | Function |
|---|---|
| 1 / L1 | AC supply side |
| 2 / T1 | Load side |
| 3 / A1+ | Positive 4–20 mA signal |
| 4 / A2− | Negative signal |
Selection & installation notes
- The catalogue title mentions 0–10 V as well as 4–20 mA, but the actual selection chart only supplies 420 current-input codes. Do not apply a voltage input without confirmation of the ordered variant.
- Phase-angle control requires coordinated heatsinking, derating and protection. Current classes do not guarantee full rated current without specified cooling.
- The source calls output voltage linear with input without a transfer curve; confirm the transfer function and control accuracy for the actual load.
- AC voltage ranges are RMS operating ranges; do not compare their numerical upper limits directly with waveform peaks. Confirm surge withstand separately.
- Use the supplied diagram and thermal design for resistive heating loads. Motor or transformer suitability is not established. OFF state does not provide electrical isolation.
Based on the official Chinese product page and selection charts ↗. Checked 2026-09-15. Confirm the current specification for the exact model when ordering.
TECHNICAL RESOURCES
Plan your integration.
ENMG relays — English product-family brochure.
This is a product-family brochure. Request a model-specific datasheet and installation drawing with your inquiry.