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STMicroelectronics Z0405MB
- Part No.:
- Z0405MB
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
Z0405MB.pdf
- Description:
- TRIAC 600V 4A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:4,990
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Product details
Overview
Z0405MB from STMicroelectronics is a 4 A, 600 V repetitive peak off-state voltage (VDRM/VRRM), 4-quadrant triac in DPAK package, with 5 mA gate trigger current (IGT) and 125 °C maximum junction temperature, designed for AC load switching in heating elements, motor drives, and inrush current limiting circuits.
For engineers reviewing the Z0405MB datasheet, Z0405MB pinout, Z0405MB application, or Z0405MB equivalent, key selection criteria include RMS on-state current rating (4 A), non-repetitive surge capability (15 A at 20 ms), critical dV/dt immunity (20 V/µs), thermal resistance (3 °C/W junction-to-case), and halogen-free ECOPACK2 compliance.
Technical Context
This triac operates across all four quadrants (I, II, III, IV) without requiring external polarity control, enabling simplified gate drive circuitry in bidirectional AC switching applications. Its 5 mA IGT and 1.3 V VGT ensure reliable triggering with low-power microcontroller GPIOs or optocouplers.
With 750 V non-repetitive peak off-state voltage (VDSM/VRSM), 50 A/µs critical rate of rise of on-state current (dl/dt), and 20 V/µs static dV/dt immunity at 110 °C, it supports robust operation in noisy industrial environments and high-surge mains-connected systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 4 A - Sustained AC load current handling at Tc = 107 °C, suitable for continuous heater or actuator control |
| VDRM / VRRM | 600 V - Maximum repetitive blocking voltage per half-cycle, compatible with 230 VAC mains with safety margin |
| VDSM / VRSM | 750 V - Non-repetitive peak blocking voltage for surge events (e.g., lightning, switching transients) |
| IGT | 5 mA max - Low gate current requirement enables direct drive from MCU pins or low-current optocouplers |
| Tj max | 125 °C - Maximum operating junction temperature, supporting compact heatsink designs in enclosed appliances |
| Rth(j-c) | 3 °C/W - Junction-to-case thermal resistance enables efficient heat transfer to PCB copper or external heatsink |
| dV/dt immunity | 20 V/µs min - Immunity to false triggering from fast-rising line noise or commutation transients |
Pinout & Package
The Z0405MB is housed in a surface-mount DPAK (TO-252) package with three terminals: A1 (MT1), A2 (MT2), and G (Gate). The exposed tab is electrically connected to A2 and serves as the primary thermal path.
| 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; electrically tied to exposed thermal tab for heatsinking |
| G | Gate | Control input for bidirectional conduction initiation; triggers in all four quadrants with ≤5 mA |
Key Features
| Feature | Design Value |
|---|---|
| 4-quadrant operation | Enables gate-triggered conduction regardless of A2–A1 voltage polarity or current direction, eliminating need for external polarity detection |
| ECOPACK2 compliance | Halogen-free molding compound and lead-free plating meet RoHS and JEDEC J-STD-020 reflow requirements |
| Low IGT and VGT | 5 mA / 1.3 V max gate thresholds reduce driver complexity and power loss in isolated control stages |
| High dV/dt immunity | 20 V/µs minimum ensures stable operation under fast transient conditions common in motor and transformer loads |
Applications
| Heating Control in Ovens | Power Tool Motor Speed Control |
|---|---|
Use Scenario: Phase-angle controlled AC power delivery to resistive heating elements in domestic ovens and cooktops. IC Role / Device Role / Timing Role: Bidirectional AC switch regulating RMS power via gate timing relative to zero-crossing. Use Value: Enables precise thermal regulation with 4 A continuous current handling and 750 V surge tolerance for mains transients. | Use Scenario: Variable-speed AC motor drive in corded drills and angle grinders using leading-edge phase control. IC Role / Device Role / Timing Role: Main power switch triggered by microcontroller-generated gate pulses synchronized to line voltage. Use Value: Supports high inrush currents (15 A surge) during motor startup while maintaining 125 °C junction limit under sustained load. |
| Inrush Current Limiting | Industrial Actuator Interface |
Use Scenario: Soft-start circuit for large capacitive or transformer-coupled loads to suppress turn-on surge. IC Role / Device Role / Timing Role: Delayed-conduction triac bypassing NTC thermistor after warm-up, controlled by timing circuit. Use Value: 50 A/µs dl/dt rating prevents commutation failure during rapid current rise; 3 °C/W Rth(j-c) ensures thermal stability. | Use Scenario: Solid-state replacement for electromechanical relays driving solenoids, valves, and pneumatic actuators. IC Role / Device Role / Timing Role: Zero-voltage-switched AC load switch interfacing PLC outputs to 230 VAC field devices. Use Value: 600 V VDRM provides 2× safety margin over 230 VAC RMS; 4-quadrant operation eliminates need for snubber diodes. |
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 | Same 4 A IT(RMS), 600 V VDRM, but TO-220 package; higher Rth(j-a) (65 °C/W vs. 70 °C/W typ.) | Requires through-hole mounting and larger heatsink; less suitable for high-density SMD boards | Prefer Z0405MB for space-constrained SMD designs; BT134-600D where mechanical robustness or legacy footprint required |
| MAC4DCM | 4 A IT(RMS), 600 V VDRM, DPAK, but 10 mA IGT and lower dV/dt immunity (10 V/µs) | Needs stronger gate drive; more susceptible to false triggering in EMI-heavy environments | Choose Z0405MB when low IGT and high noise immunity are critical; MAC4DCM only if cost sensitivity outweighs performance trade-offs |
Compared with BT134-600D and MAC4DCM, Z0405MB uniquely combines SMD DPAK packaging, 5 mA IGT, and 20 V/µs dV/dt immunity-making it optimal for compact, noise-resilient, microcontroller-driven AC switching in consumer and industrial equipment.
Availability
Z0405MB is available at Aetrix Electronics and suitable for heating control, motor speed regulation, inrush limiting, and actuator interface applications requiring stable component supply and long-term industrial availability.
Supply support for Z0405MB 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, specializing in power discrete devices, microcontrollers, sensors, and automotive ICs.
The Z0405MB belongs to ST's high-reliability triac product line, engineered specifically for robust AC power control in home appliances, power tools, and industrial automation systems.
FAQ
What is the maximum allowable case temperature for continuous 4 A operation?
The datasheet specifies IT(RMS) = 4 A at Tc = 107 °C. Exceeding this case temperature reduces safe RMS current capacity; derating curves in Figure 2 show 3.2 A at Tc = 125 °C. Thermal design must maintain case temperature ≤107 °C under full load using ≥1 cm² copper pour or external heatsink.
Can Z0405MB be driven directly from a 3.3 V microcontroller GPIO?
Yes - with appropriate series resistance. At VGT ≤1.3 V and IGT ≤5 mA, a 390 Ω resistor limits gate current to ~5.4 mA when driven from 3.3 V, satisfying trigger requirements. Ensure gate pulse width exceeds 10 µs and avoid floating gate states with pull-down resistors.
Is a snubber circuit required for inductive loads?
A snubber is recommended for inductive loads (e.g., motors, solenoids) to suppress voltage spikes during turn-off. The Z0405MB's 20 V/µs dV/dt immunity helps, but RL snubbers (e.g., 100 Ω + 100 nF) improve reliability by limiting dv/dt across MT2–MT1 during commutation.
Does the DPAK tab require electrical isolation from the heatsink?
Yes - the exposed tab is internally connected to A2 (MT2). If A2 is at live AC potential, the heatsink must be insulated using mica washers or silicone pads rated for ≥750 V isolation. Direct metal-to-metal contact risks shock hazard and short circuits.
Z0405MB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ECOPACK2
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- 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):
- 5 mA
- Current - Hold (Ih) (Max):
- 5 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
Z0405MB FAQ
1.How can I place an order for Z0405MB through Aetrix?
Please submit a Request for Quotation (RFQ) for Z0405MB 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 Z0405MB reliable?
The price and inventory of Z0405MB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for Z0405MB is usually 5 days.
3.What payment methods are accepted for Z0405MB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for Z0405MB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for Z0405MB?
Z0405MB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your Z0405MB 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 Z0405MB?
For technical support, including Z0405MB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your Z0405MB requirements.
6.How does Aetrix verify that Z0405MB is sourced from the original manufacturer or authorized distributors?
All Z0405MB 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 Z0405MB meets industry standards.
7.What is the process for return or replacement of Z0405MB?
All Z0405MB units undergo pre-shipment inspection (PSI). If there is an issue with Z0405MB, 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 Z0405MB part is unused and in its original packaging.
Return procedure for Z0405MB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
Z0405MB Tags
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Z0103NN5AA4
STMicroelectronics
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Z0103MNT1G
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2N6075BG
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BTA08-600CWRG
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T835H-6G-TR
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