ENMG / SOLID-STATE RELAYS
MZ
High-current ceramic-substrate solid-state relays
Zero-cross AC solid-state relays using inverse-parallel thyristors and a DBC ceramic/copper substrate for high-current switching assemblies.
Request a quote ↗TECHNICAL DATA / MZ
Specifications & selection.
- 150, 200 and 300 A nominal device selections.
- 48–690 VAC load range in the source.
- 4–32 VDC control input.
| Model | Nominal current | Surge at10ms | Junction/case Rjc | I²t at10ms |
|---|---|---|---|---|
| MZ69150D | 150 A | 2000 A | 0.085 °C/W | 20000 A²s |
| MZ69200D | 200 A | 2500 A | 0.063 °C/W | 31250 A²s |
| MZ69300D | 300 A | 4000 A | 0.045 °C/W | 80000 A²s |
| Parameter | Value |
|---|---|
| Load voltage | 48–690 VAC |
| Repetitive blocking voltage | 1600 V peak |
| On-state voltage | ≤1.8 V at nominal current |
| Off-state leakage | ≤10 mA at690 VAC |
| Switching | Zero-cross; maximum on/off delay half a cycle |
| Control input | 4–32 VDC, nominal24 V;24 mA at30 V |
| Input thresholds | Pickup≤3.5 V; off<2.5 V, source values |
| Control terminals | 3/A1+ and4/A2− |
| Power terminals | 1/L1 supply;2/T1 load |
| Dielectric / insulation | 4 kVrms, source test classification /100 MΩ at500 VDC |
| Case temperature | −30 to +80 °C; not a full-current ambient rating |
| Storage | −40 to +100 °C |
| Outline / mass | Not confirmed in the current source record |
Selection & installation notes
- Rated current requires an engineered heat sink, thermal interface and temperature derating. The source also quotes generic substrate thermal resistance1–3 °C/W; do not substitute it for the model-specific Rjc values.
- No verified pulse repetition or complete thermal curve is provided here. Obtain the exact datasheet for fuse coordination, surge waveform and allowable case/junction temperature.
- A dry contact must switch a suitable DC control supply; it cannot energize the LED input by itself. Confirm current capacity and polarity of the PLC drive.
- The source’s generic neutral-return drawing is not valid for every690 V installation. Use the approved circuit for the actual phase/line voltage and load.
- Zero-cross switching is not a universal motor-start or transformer-inrush solution. Confirm the specific inductive load and switching duty; no motor-controller rating is inferred.
- Use suitable semiconductor protection and a separate isolator. Verify terminal-size-specific torque instead of applying the source’s generic8–10 N·m to every terminal.
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.