ENMG / SOLID-STATE RELAYS
m-SDR
Integrated-heat-sink solid-state relays
DIN-rail or surface-mounted solid-state relays with a narrow aluminum heat sink, providing SCR AC and optional MOSFET DC output configurations.
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Specifications & selection.
- 25 A and40 A nominal selections, subject to thermal design.
- Zero-cross and random-trigger AC options.
- Voltage-input and4–20 mA variants by confirmed model.
| Model | Output range | Trigger | Control |
|---|---|---|---|
| m-SDR25A3032 | 25 A,48–480 VAC | Zero-cross | 5–24 VDC |
| m-SDR40A3032 | 40 A,48–480 VAC | Zero-cross | 5–24 VDC |
| m-SDR40A3132 | 40 A,48–480 VAC | Random | 5–24 VDC |
| m-SDR40A30L4 | 40 A,48–480 VAC | Zero-cross | 4–20 mA |
| m-SDR40A31L4 | 40 A,48–480 VAC | Random | 4–20 mA |
| m-SDR25A2032 /40A2032 | 25 /40 A,24–280 VAC,custom | Zero-cross | 5–24 VDC |
| m-SDR25D6132 /40D6132 | 25 /40 A,0–60 VDC,custom | MOSFET | 5–24 VDC |
| m-SDR40D61L4 | 40 A,0–60 VDC,custom | MOSFET | 4–20 mA |
| Parameter | 25 A | 40 A |
|---|---|---|
| Junction/case thermal resistance | ≤0.35 °C/W | ≤0.2 °C/W |
| I²t at10ms in original table | 1600 A²s | 3250 A²s |
| On-state drop in prose | ≤1.5 V at nominal current | ≤1.5 V at nominal current |
| Off-state leakage in prose | <10 mA | <10 mA |
| Switching delay in prose | ≤half cycle+1 ms | ≤half cycle+1 ms |
| Parameter | Value |
|---|---|
| Voltage control code32 | 5–24 VDC;≤10 mA in prose; off<1 V |
| Current control L4 | 4–20 mA; transfer function and burden not specified |
| DC variants | 0–60 VDC reference;Ron not supplied; require order datasheet |
| Ambient | −30 to +80 °C;≤90% RH, non-condensing; derating required |
| Mounting | 35 mm DIN rail or surface screws |
| Original outline | 104 ×23 ×101.5 mm;94 mm mounting-center spacing |
| Prose outline /mass | 104 ×22.5 ×101 mm /approximately350 g |
| Terminals | M3 input /M4 output; obtain terminal-specific torque |
| Item | Details |
|---|---|
| AC voltage chart | Original chart is25A2032/40A2032,24–280 VAC; current prose emphasizes3032,48–480 VAC |
| 25 A blocking voltage | Prose says≥600 V peak; original2032 table1600 V.600 V alone does not establish480 VAC capability |
| Surge row | Original image has voltage units in a surge-current row; prose gives180/850 A at10ms. Obtain corrected ratings |
| L4 behavior | Prose says on at≥4 mA but does not define proportional transfer, burst or phase-angle behavior |
Selection & installation notes
- Do not combine specifications from the2032 chart with a3032 ordered variant. Confirm blocking voltage, surge waveform and correctedI²t data before fuse selection, especially for480 VAC service.
- A random-trigger relay needs a suitable synchronized controller for phase-angle control; a generic DC input alone is not an analog voltage regulator. Confirm what the L4 variant actually implements.
- The heat sink does not eliminate derating. Obtain the exact curve, airflow and junction-temperature limits; generic80% or10%-per10°C rules are not guaranteed ratings.
- Protect inductive loads against transients using a load-specific circuit. Verify inrush and the intended application before motor, transformer or capacitor switching.
- Output-off is not isolation. Provide a suitable upstream disconnect and semiconductor protection; isolate both circuits before service.
- The naming explanation omits a field that appears in the listed DC codes. Order by a confirmed complete part number, not by combining naming fragments.
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.