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STMicroelectronics Z0402MH
- Part No.:
- Z0402MH
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Datasheet:
-
Z0402MH.pdf
- Description:
- TRIAC 600V 4A IPAK
- Quantity:
- Payment:
- Shipping:
Inventory:2,963
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Product details
Overview
Z0402MH from STMicroelectronics is a 4 A, 600 V repetitive peak off-state voltage (VDRM/VRRM), 4-quadrant triac in IPAK through-hole package, with 3 mA gate trigger current (IGT) and 125 °C maximum junction temperature, designed for AC load switching in heating elements and motor-driven power tools.
For engineers reviewing the Z0402MH datasheet, Z0402MH pinout, Z0402MH application, or Z0402MH equivalent, key selection criteria include RMS on-state current rating (4 A), non-repetitive surge capability (16 A @ 16.7 ms), critical dV/dt immunity (20 V/µs min), thermal resistance (3 °C/W junction-to-case), and gate sensitivity (3 mA IGT).
Technical Context
The Z0402MH operates as a bidirectional AC switch with full 4-quadrant triggering capability, enabling gate control regardless of polarity between MT2 and MT1 terminals. Its 3 mA IGT and 1.3 V VGT ensure reliable turn-on under low-power gate drive conditions typical in microcontroller-based appliance controls.
It features 750 V non-repetitive peak off-state voltage (VDSM/VRSM), 50 A/µs critical rate of rise of on-state current (dl/dt), and 0.95 V threshold voltage at 125 °C - supporting stable conduction in thermally demanding industrial environments up to Tj = 125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 4 A - supports continuous resistive or inductive AC loads up to 4 A RMS without heatsink at Tc = 107 °C |
| VDRM / VRRM | 600 V - blocks 600 V peak AC line voltage in both directions during off-state, suitable for 230 VAC mains |
| IGT | 3 mA max - enables direct drive from low-current GPIOs or optocouplers without external amplification |
| Tj max | 125 °C - allows operation in enclosed enclosures or high-ambient industrial settings with derated current |
| Rth(j-c) | 3 °C/W max - permits efficient heat transfer to PCB copper or small heatsinks for thermal management |
| dV/dt immunity | 20 V/µs min - resists false triggering from fast transients in noisy motor or heater circuits |
| ITSM (16.7 ms) | 16 A - withstands inrush surges from cold filament lamps or transformer primaries |
Pinout & Package
IPAK package: compact through-hole outline with three leads (A1, A2, G), 0.3 g mass, UL94 V0 halogen-free molding, lead-free plating, ECOPACK2 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main Terminal 1 | Reference terminal for gate triggering; connected to load return or neutral side in AC switching |
| A2 (MT2) | Main Terminal 2 | High-side AC line connection; carries full load current in either direction during conduction |
| G | Gate | Controls turn-on in all four quadrants; requires ≥3 mA pulse for reliable triggering at 25–125 °C |
Key Features
| Feature | Design Value |
|---|---|
| 4-quadrant triggering | Enables gate control with any polarity of A2 relative to A1 - eliminates need for external diodes in zero-crossing or phase-control circuits |
| Low IGT (3 mA) | Reduces gate driver component count and power consumption in battery-powered or energy-efficient controllers |
| 750 V VRSM | Provides margin against transient overvoltages (e.g., lightning-induced spikes) on 230 VAC lines |
| ECOPACK2 compliance | Meets RoHS, REACH, and halogen-free requirements for global appliance and industrial certifications |
Applications
| Heating Element Control | Power Tool Motor Control |
|---|---|
Use Scenario: Phase-angle dimming of resistive heating coils in electric ovens or water heaters. IC Role / Device Role / Timing Role: Bidirectional AC switch regulating power delivery via gate-triggered conduction angle adjustment. Use Value: Enables precise thermal regulation with 4 A RMS current handling and 20 V/µs dV/dt immunity to suppress false triggering from coil back-EMF. | Use Scenario: On/off and speed control of universal motors in corded drills and sanders. IC Role / Device Role / Timing Role: Main AC power switch activated by microcontroller-generated gate pulses synchronized to zero-crossing detection. Use Value: Supports 16 A surge current for motor startup while maintaining 3 mA gate sensitivity for low-power MCU interface. |
| Inrush Current Limiting | Industrial Actuator Switching |
Use Scenario: Soft-start circuit for transformers or large capacitive loads in PLC I/O modules. IC Role / Device Role / Timing Role: Controlled turn-on device limiting initial current surge using delayed gate firing. Use Value: Leverages 1.5 A²s I²t rating and 750 V VRSM to absorb energy from inrush events without failure. | Use Scenario: Driving solenoid valves or electromagnetic clutches in factory automation systems. IC Role / Device Role / Timing Role: High-reliability AC load switch interfaced with isolated gate drivers in 24–230 VAC control panels. Use Value: Delivers 125 °C junction rating and 3 °C/W Rth(j-c) for stable operation in unventilated control cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triac switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BT134-600D | 4 A IT(RMS), 600 V VDRM, TO-220 package, IGT = 5 mA | Larger footprint, higher gate drive requirement, lower thermal efficiency (Rth(j-c) ≈ 5 °C/W) | Preferred where board space allows TO-220 mounting and gate drive margin exceeds 5 mA |
| MAC4DCM | 4 A IT(RMS), 600 V VDRM, DPAK package, IGT = 10 mA, Tj max = 110 °C | Surface-mount only, reduced thermal robustness, higher gate current demand | Used when SMT assembly is mandatory and ambient temperature remains below 85 °C |
Compared with BT134-600D and MAC4DCM, the Z0402MH offers superior thermal performance (3 °C/W vs. ≥5 °C/W), lower gate sensitivity (3 mA vs. ≥5 mA), and through-hole reliability for high-vibration environments - making it optimal for cost-sensitive, thermally constrained home appliance designs.
Availability
Z0402MH is available at Aetrix Electronics and suitable for heating element control, power tool motor drives, inrush current limiting circuits, and industrial actuator switching requiring stable component supply across production lifecycles.
Supply support for Z0402MH includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.
The Z0402MH belongs to ST's high-reliability triac portfolio targeting cost-effective, thermally robust AC power control in white goods and professional power tools - emphasizing low gate drive, surge resilience, and environmental compliance.
FAQ
What is the maximum allowable case temperature for continuous 4 A RMS operation?
The Z0402MH supports 4 A RMS on-state current at case temperature (Tc) ≤ 107 °C, per absolute maximum ratings. Exceeding this requires current derating per Figure 2 in DS14064; at Tc = 80 °C, full 4 A remains permissible, but at Tc = 125 °C, RMS current must be reduced to ~2.5 A to maintain Tj ≤ 125 °C.
Can Z0402MH be used in zero-crossing switch applications?
Yes - its 4-quadrant triggering and 3 mA IGT allow reliable gate activation at or near AC zero-crossing points. However, zero-crossing operation requires external timing circuitry or MCU synchronization; the device itself does not integrate zero-crossing detection logic.
Is Z0402MH compatible with lead-free reflow soldering processes?
No - Z0402MH uses an IPAK through-hole package intended for wave or hand soldering. Its maximum lead temperature is rated at 260 °C for 10 seconds; reflow profiles exceed this thermal limit and may damage internal bonds or molding compound.
How does the 750 V VRSM rating impact system-level surge protection design?
The 750 V non-repetitive peak off-state voltage provides headroom above standard 600 V VDRM, allowing the device to survive short-duration line transients (e.g., 1 kV/1.2–50 µs surge) without conduction - reducing dependency on external MOVs or TVS diodes in Class II appliance designs.
Z0402MH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ECOPACK2
- Package/Case:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Packaging:
- Tube
- Product Status:
- Active
- Triac Type:
- Standard
- Voltage - Off State:
- 600 V
- Current - On State (It (RMS)) (Max):
- 4 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1.3 V
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 15A, 16A
- Current - Gate Trigger (Igt) (Max):
- 3 mA
- Current - Hold (Ih) (Max):
- 5 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- IPAK
Z0402MH FAQ
1.How can I place an order for Z0402MH through Aetrix?
Please submit a Request for Quotation (RFQ) for Z0402MH on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for Z0402MH reliable?
The price and inventory of Z0402MH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for Z0402MH is usually 5 days.
3.What payment methods are accepted for Z0402MH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for Z0402MH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for Z0402MH?
Z0402MH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your Z0402MH order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for Z0402MH?
For technical support, including Z0402MH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your Z0402MH requirements.
6.How does Aetrix verify that Z0402MH is sourced from the original manufacturer or authorized distributors?
All Z0402MH products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that Z0402MH meets industry standards.
7.What is the process for return or replacement of Z0402MH?
All Z0402MH units undergo pre-shipment inspection (PSI). If there is an issue with Z0402MH, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The Z0402MH part is unused and in its original packaging.
Return procedure for Z0402MH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
Z0402MH Tags
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Z0103NN5AA4
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