ENMG / SOLID-STATE RELAYS
SN
Single-phase AC solid-state relays
Panel-mounted solid-state relays with optical control isolation and selectable AC voltage, input and triggering configurations.
Request a quote ↗TECHNICAL DATA / SN
Specifications & selection.
- 10, 15, 25, 40, 80, 100 and 120 A current codes.
- 24 voltage code: 12–280 VAC; 48: 24–480 VAC.
- Default zero-cross triggering; random and overvoltage-protected options.
| Code | Meaning |
|---|---|
| D | 3–32 VDC |
| A | 90–280 VAC |
| E | 18–36 VAC |
| U | 20–265 VAC/DC |
| R | 470 kΩ, 2 W resistance input |
| L | 4–20 mA input |
| No trigger suffix / -1 | Zero-cross / random |
| No protection suffix / M | RC snubber / internal overvoltage protection |
| Item | SN4840D |
|---|---|
| Output | 40 A at 24–480 VAC, with heatsink |
| Input | 3–32 VDC |
| Trigger | Zero-cross |
| Terminals | 1/L1, 2/T1 output; 3/A1+, 4/A2− control |
| Parameter | Published value |
|---|---|
| Load frequency | 40–70 Hz |
| Input-output isolation | ≥2500 Vrms described as typical; test duration unspecified |
| ON drop / OFF leakage | ≤1.6 Vrms / ≤5 mA, described as typical |
| Ambient / humidity | −40 to +70 °C / 5–85% RH; no condensation or icing |
| Ingress | IP20 |
| Outline / mass / surge / minimum load | Exact model-specific data required |
Selection & installation notes
- This is an AC-output family. The prose also inserts a 5–60 VDC / 25 A load statement, which is not present on the verified SN4840D label and is inconsistent with its AC switching function; do not use it as a DC load rating.
- The label says the current rating requires a heatsink; this does not establish that a heatsink is included. Confirm the supplied assembly and thermal design.
- Code options are not freely interchangeable. Confirm availability and the control transfer function for R/L input variants.
- Compare RMS supply voltage with the RMS operating range and verify surge voltage separately. Do not infer motor or transformer capacity from resistive current classes.
- Confirm protective-device coordination and terminal torque; isolate the upstream supply before maintenance.
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.