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STMicroelectronics T405-600H
- Part No.:
- T405-600H
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Datasheet:
-
T405-600H.pdf
- Description:
- TRIAC SENS GATE 600V 4A TO251
- Quantity:
- Payment:
- Shipping:
Inventory:871
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Product details
Overview
T405-600H from STMicroelectronics is a 4 A, 600 V three-quadrant logic-level triac in IPAK package, designed for zero-crossing–free AC phase control of inductive loads. It features 5 mA max gate trigger current (IGT), 1.56 V max on-state voltage (VTM) at 5.5 A, and 20 V/µs minimum critical dV/dt at 125 °C - enabling direct microcontroller drive without buffer stages in universal motor and solenoid applications.
For engineers reviewing the T405-600H datasheet, T405-600H pinout, T405-600H application, or T405-600H equivalent, key selection criteria include commutation robustness under inductive switching, gate sensitivity for low-power drive, thermal resistance (Rth(j-c) = 2.6 °C/W), and snubberless operation in compact home appliance PCB layouts.
Technical Context
The T405-600H implements ST's Snubberless logic-level triac architecture with optimized emitter geometry and gate metallization to sustain high dI/dt (50 A/µs) and dV/dt (20 V/µs) without external snubbers. Its three-quadrant operation excludes quadrant IV triggering, reducing false turn-on risk in noisy AC environments.
It operates across -40 to +125 °C junction temperature with 4 A RMS on-state current rating at TC = 110 °C, supported by low dynamic resistance (120 mΩ) and 0.89 V threshold voltage (Vt0) at 125 °C - ensuring stable conduction under thermal stress in enclosed power tool enclosures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(rms) | 4 A - Sustains continuous 4 A RMS load current at TC = 110 °C without derating in IPAK heatsinked layouts |
| VDRM / VRRM | 600 V - Blocks 600 V peak reverse/forward voltage, suitable for 230 VAC mains with safety margin |
| IGT (max) | 5 mA - Enables direct drive from 3.3 V/5 V GPIOs without gate driver ICs |
| dV/dt (min) | 20 V/µs at 125 °C - Resists false triggering during fast voltage transients in motor commutation |
| Rth(j-c) | 2.6 °C/W - Delivers 1.5 W max power dissipation at ΔT = 4°C rise from case to junction |
| VTM (max) | 1.56 V at 5.5 A - Limits conduction loss to < 8.6 W at full load, reducing thermal design burden |
| I²t (fusing) | 5.1 A²s - Withstands single half-cycle surge up to 30 A (50 Hz) without destruction |
Pinout & Package
IPAK package (TO-251AA equivalent): insulated plastic body with integral heatsink tab, lead-free, UL94 V0 epoxy, 0.4 g mass, 75 pcs/tube. Thermal pad electrically connected to MT2 terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MT1 (Main Terminal 1) | Anode 1 / Load return path | Reference terminal for gate trigger; polarity-sensitive connection in phase-control circuits |
| MT2 (Main Terminal 2) | Anode 2 / Line input or load feed | Electrically tied to heatsink tab; must be isolated from chassis ground unless designed as common reference |
| G (Gate) | Trigger control input | Low-current (≤5 mA) logic-level input; requires no series resistor when driven by 3.3 V MCU with 200 Ω output impedance |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless operation | Eliminates need for RC snubber networks in 230 VAC inductive loads, reducing BOM count and PCB area by ≥3 components |
| Three-quadrant triggering | Blocks quadrant IV conduction, preventing unintended turn-on during negative gate pulses in noisy industrial environments |
| Logic-level gate sensitivity | 5 mA IGT max enables direct interface with STM32 GPIOs, avoiding discrete transistor buffers and associated layout complexity |
| High commutation performance | 20 V/µs dV/dt and 50 A/µs dI/dt ratings ensure reliable turn-off in universal motor brush arcing and solenoid coil collapse |
| ECOPACK® compliant | Halogen-free, RoHS-compliant molding compound meets IEC 61249-2-21 and JEDEC J-STD-020 reflow profiles |
Applications
| Universal Motor Control | Electrovalve Actuation |
|---|---|
Use Scenario: Speed regulation of vacuum cleaner or power drill motors using phase-angle control. IC Role / Device Role / Timing Role: Main AC power switch triggered synchronously with zero-crossing detection to modulate RMS voltage. Use Value: 4 A rating supports 500–800 W tools; 5 mA IGT allows direct STM32F0 GPIO drive without level-shifting. |
Use Scenario: On/off control of washing machine water inlet valves rated ≤120 VA. IC Role / Device Role / Timing Role: Solid-state replacement for mechanical relays, switched via optocoupler-isolated MCU output. Use Value: Snubberless operation eliminates 10 kΩ/100 nF network; 2.6 °C/W Rth(j-c) enables natural convection cooling on FR4 board. |
| Kitchen Appliance Heating | Small Dishwasher Pump |
Use Scenario: Power modulation for toaster or coffee maker heating elements (resistive + minor inductance). IC Role / Device Role / Timing Role: Half-wave or full-wave AC switching element in microcontroller-based thermal management loop. Use Value: 600 V VDRM provides 2.6× safety margin over 230 VAC peak (325 V); 1.56 V VTM limits self-heating to ≤6.2 W at 4 A. |
Use Scenario: Intermittent 230 VAC drive for recirculation pump in compact dishwashers. IC Role / Device Role / Timing Role: High-reliability AC switch replacing electromechanical relays subject to contact wear. Use Value: 30 A non-repetitive surge rating handles pump startup inrush; IPAK package fits 12 mm × 12 mm board space. |
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, but 15 mA IGT max and TO-92 package - requires gate buffer stage | Limited to low-power resistive loads; unsuitable for direct MCU drive or high-dI/dt inductive switching | Select only if cost is primary constraint and gate drive capability exceeds 15 mA |
| T410-600H | 10 mA IGT max, same IPAK package and 600 V rating, but higher latching current (IL = 25 mA vs. 10 mA) | Better noise immunity in EMI-heavy environments; slightly slower turn-on in low-current phase control | Prefer when system uses 5 V logic with higher output impedance or requires enhanced false-trigger margin |
Compared with BT134-600D, T405-600H reduces gate drive complexity and improves inductive load commutation; versus T410-600H, it offers faster turn-on at light loads but demands tighter gate signal integrity.
Availability
T405-600H is available at Aetrix Electronics and suitable for universal motor control, electrovalve actuation, kitchen appliance heating, and small dishwasher pump designs requiring stable component supply across multi-year production cycles.
Supply support for T405-600H 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, Switzerland, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
The T4 series triacs were developed specifically for snubberless AC phase control in cost-sensitive, space-constrained white goods and power tools - prioritizing gate sensitivity, thermal efficiency, and commutation reliability over legacy triac architectures.
FAQ
What is the maximum junction temperature for continuous operation of T405-600H?
The T405-600H has an operating junction temperature range of -40 to +125 °C. Continuous operation at 125 °C is permitted only when case temperature (TC) is maintained at ≤110 °C per Table 3, and thermal design ensures Rth(j-c) ≤ 2.6 °C/W with adequate heatsinking.
Can T405-600H replace a standard 4 A triac like BT136 in existing designs?
Yes, but only if the existing design uses logic-level gate drive (≤5 mA) and does not rely on quadrant IV triggering. T405-600H's three-quadrant operation excludes QIV, so circuits dependent on negative gate pulses during MT2-negative half-cycles may fail to trigger reliably.
Is a heatsink required for T405-600H at 4 A RMS load current?
A heatsink is mandatory at 4 A RMS. With Rth(j-c) = 2.6 °C/W and VTM ≈ 1.5 V, power dissipation reaches ~6 W, causing >15 °C junction-to-case rise. Without heatsinking, junction temperature would exceed 125 °C even at ambient 25 °C - violating absolute maximum ratings.
Does T405-600H require a snubber circuit for driving universal motors?
No snubber is required. The device's 20 V/µs dV/dt rating at 125 °C and optimized internal structure enable snubberless operation with universal motors up to 800 W, as validated in ST's application note AN4312 for vacuum cleaner motor control.
T405-600H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Packaging:
- Tube
- Product Status:
- Active
- Triac Type:
- Logic - Sensitive Gate
- 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):
- 30A, 31A
- Current - Gate Trigger (Igt) (Max):
- 5 mA
- Current - Hold (Ih) (Max):
- 10 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-251 (IPAK)
T405-600H FAQ
1.How can I place an order for T405-600H through Aetrix?
Please submit a Request for Quotation (RFQ) for T405-600H 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 T405-600H reliable?
The price and inventory of T405-600H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T405-600H is usually 5 days.
3.What payment methods are accepted for T405-600H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T405-600H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T405-600H?
T405-600H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T405-600H 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 T405-600H?
For technical support, including T405-600H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T405-600H requirements.
6.How does Aetrix verify that T405-600H is sourced from the original manufacturer or authorized distributors?
All T405-600H 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 T405-600H meets industry standards.
7.What is the process for return or replacement of T405-600H?
All T405-600H units undergo pre-shipment inspection (PSI). If there is an issue with T405-600H, 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 T405-600H part is unused and in its original packaging.
Return procedure for T405-600H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T405-600H Tags
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Z0103NN5AA4
STMicroelectronics
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