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STMicroelectronics T435-600H
- Part No.:
- T435-600H
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Datasheet:
-
T435-600H.pdf
- Description:
- TRIAC ALTERNISTOR 600V 4A TO251
- Quantity:
- Payment:
- Shipping:
Inventory:2,744
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Product details
Overview
T435-600H from STMicroelectronics is a 4 A, 600 V snubberless three-quadrant triac in IPAK package, designed for AC inductive load switching with high commutation robustness. It features 35 mA maximum gate trigger current (IGT), 400 V/µs dV/dt immunity at 125 °C, and 50 A/µs critical dI/dt rating - enabling reliable operation in universal motor control and kitchen appliance power stages.
For engineers reviewing the T435-600H datasheet, T435-600H pinout, T435-600H application, or T435-600H equivalent, key selection criteria include snubberless commutation capability, junction temperature derating up to +125 °C, thermal resistance Rth(j-c) = 2.6 °C/W, and compatibility with logic-level gate drive circuits.
Technical Context
The T435-600H employs ST's Snubberless™ logic-level triac architecture optimized for inductive loads without external snubbers. Its three-quadrant operation excludes quadrant I triggering, reducing false turn-on risk while maintaining full AC cycle control.
It delivers 30 A non-repetitive surge current (t = 20 ms, 50 Hz), 5.1 A²s I²t fusing value, and holds 1 mA max off-state leakage (IDRM/IRRM) at 125 °C - ensuring stable blocking under elevated ambient conditions in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(rms) | 4 A - continuous RMS on-state current rating at Tc = 110 °C, defining maximum steady-state load handling capacity |
| VDRM / VRRM | 600 V - peak repetitive off-state voltage, specifying maximum AC line voltage it can block safely |
| IGT (max) | 35 mA - maximum gate trigger current required for turn-on, confirming compatibility with low-power microcontroller GPIOs |
| dV/dt (min) | 400 V/µs - minimum critical rate of rise of off-state voltage at Tj = 125 °C, enabling snubberless operation on noisy inductive lines |
| Rth(j-c) | 2.6 °C/W - junction-to-case thermal resistance, enabling direct heatsink mounting for thermal management in space-constrained designs |
| ITSM (50 Hz) | 30 A - non-repetitive surge current for one full sine wave (20 ms), supporting motor startup inrush current absorption |
| VTM (max) | 1.56 V - maximum on-state voltage drop at ITM = 5.5 A, determining conduction loss and self-heating at rated load |
Pinout & Package
Package: IPAK (TO-251AA), insulated leadframe, halogen-free epoxy, lead-free, recommended torque 0.4–0.6 N·m for heatsink mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main Terminal 1 | Reference terminal for gate trigger; connected to neutral or low-side AC path in standard phase-control configurations |
| A2 (MT2) | Main Terminal 2 | High-side AC line connection; carries full load current and defines polarity reference for gate triggering |
| G | Gate | Control input requiring ≥5 mA pulse (typ.) to initiate conduction; referenced to A1; sensitive to negative pulses in quadrants II/III |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless operation | Validated at 400 V/µs dV/dt and 50 A/µs dI/dt - eliminates need for RC snubber networks in motor and solenoid drive applications |
| Three-quadrant triggering | Supports gate triggering only in quadrants II and III - suppresses false turn-on from dv/dt noise during quadrant I voltage transitions |
| Logic-level gate sensitivity | Max 35 mA IGT enables direct drive from 3.3 V/5 V MCUs without external buffer transistors |
| High junction temperature rating | Rated for continuous operation up to Tj = +125 °C - supports sealed enclosure designs with limited airflow |
| Low thermal resistance | Rth(j-c) = 2.6 °C/W allows efficient heat transfer to heatsink - critical for sustained 4 A RMS conduction in IPAK footprint |
Applications
| Universal Motor Control | Kitchen Appliance Power Switching |
|---|---|
|
Use Scenario: Speed and direction control of brushed universal motors in power tools and vacuum cleaners. IC Role / Device Role / Timing Role: Main AC power switch in phase-angle control topology, triggered by zero-crossing synchronized gate pulses. Use Value: Snubberless dV/dt immunity prevents false triggering during rapid motor back-EMF transients, improving reliability over 10,000+ duty cycles. |
Use Scenario: On/off and power-level control of heating elements and motors in dishwashers and blenders. IC Role / Device Role / Timing Role: Solid-state relay replacement for AC mains switching, driven by optocoupled MCU outputs. Use Value: 4 A RMS rating and 30 A surge support handle resistive + inductive combined loads without thermal runaway in confined chassis. |
| Electrovalve Actuation | Small Home Appliance Motor Drive |
|
Use Scenario: Fast-acting AC solenoid control in washing machine water inlet valves and HVAC dampers. IC Role / Device Role / Timing Role: High-speed AC switching device with fast turn-off and low holding current (IH = 35 mA). Use Value: Low 35 mA IH ensures clean turn-off even under low-current inductive decay, preventing valve chatter or residual hold-on. |
Use Scenario: Fan and pump motor control in air purifiers, dehumidifiers, and coffee makers. IC Role / Device Role / Timing Role: Compact, heatsink-mountable AC switch replacing bulkier mechanical relays. Use Value: IPAK package provides 2.6 °C/W thermal path and 0.4 g weight - enabling fan-coil integration without mechanical stress on PCB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triac-based AC switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST T435-600T | Same electrical specs but TO-220AB package; Rth(j-c) = 2.6 °C/W identical, but larger footprint and higher mass (2.3 g) | Better suited for through-hole assembly and legacy heatsink mounts; less suitable for surface-mount density-critical boards | Select when mechanical robustness and manual assembly compatibility outweigh SMT layout efficiency |
| Littelfuse Q4004L4 | 4 A/400 V triac; lower VDRM (400 V vs. 600 V); 50 mA IGT (vs. 35 mA); no snubberless rating specified | Limited to 120 VAC systems; requires external snubber for inductive loads; not suitable for 230 VAC motor control | Only viable for low-voltage (<150 VAC), low-dV/dt applications where cost is primary constraint |
Compared with T435-600T, the T435-600H offers identical thermal and electrical performance in a lighter, surface-mount IPAK package - ideal for automated assembly and space-constrained consumer electronics. Versus Q4004L4, it provides 50% higher blocking voltage, 30% lower gate drive requirement, and verified snubberless operation essential for 230 VAC inductive switching.
Availability
T435-600H is available at Aetrix Electronics and suitable for universal motor control, kitchen appliance power switching, electrovalve actuation, and small home appliance motor drive requiring stable component supply across industrial and consumer production programs.
Supply support for T435-600H 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, power, microcontroller, and sensor solutions for automotive, industrial, and consumer markets.
The T4 series belongs to ST's high-reliability AC power switching product line, engineered specifically for snubberless, logic-level triac operation in demanding inductive load environments - targeting cost-sensitive yet thermally rigorous appliance and tool applications.
FAQ
Is T435-600H compatible with zero-crossing SSR drivers?
No - T435-600H is a phase-control triac, not a zero-crossing device. It conducts immediately upon gate trigger and remains on until current falls below holding level (IH = 35 mA). Zero-crossing operation requires external timing circuitry or dedicated zero-crossing ICs driving its gate synchronously with AC line zero crossings.
What is the minimum gate pulse width required for reliable turn-on?
The datasheet specifies gate pulse width tp ≥ 20 µs for peak gate current IGM = 4 A. For logic-level drive (e.g., MCU GPIO), a 100 µs pulse at ≥10 mA ensures robust triggering across temperature and manufacturing variation, especially under worst-case IGT = 35 mA and low VDD conditions.
Can T435-600H be used without a heatsink?
Yes - at ≤1 A RMS load current and ambient temperature ≤40 °C with ≥10 cm² copper pour (35 µm), thermal simulation shows junction temperature stays below 100 °C. At full 4 A RMS, a heatsink is mandatory: Rth(j-a) = 100 °C/W (IPAK on FR4) exceeds safe limits without forced convection or metal-core PCB.
Does T435-600H support bidirectional current sensing?
No - T435-600H is a passive switching device with no integrated current sensing. Bidirectional AC current measurement requires external components: a current transformer, Hall-effect sensor, or shunt resistor with isolated amplifier - placed upstream or downstream of the triac, not within the device itself.
T435-600H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- Snubberless™
- Package/Case:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Packaging:
- Tube
- Product Status:
- Active
- Triac Type:
- Alternistor - Snubberless
- 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):
- 35 mA
- Current - Hold (Ih) (Max):
- 35 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-251 (IPAK)
T435-600H FAQ
1.How can I place an order for T435-600H through Aetrix?
Please submit a Request for Quotation (RFQ) for T435-600H 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 T435-600H reliable?
The price and inventory of T435-600H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T435-600H is usually 5 days.
3.What payment methods are accepted for T435-600H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T435-600H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T435-600H?
T435-600H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T435-600H 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 T435-600H?
For technical support, including T435-600H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T435-600H requirements.
6.How does Aetrix verify that T435-600H is sourced from the original manufacturer or authorized distributors?
All T435-600H 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 T435-600H meets industry standards.
7.What is the process for return or replacement of T435-600H?
All T435-600H units undergo pre-shipment inspection (PSI). If there is an issue with T435-600H, 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 T435-600H part is unused and in its original packaging.
Return procedure for T435-600H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
T435-600H Tags
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Z0103NN5AA4
STMicroelectronics
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Z0107MNT1G
Littelfuse Inc.
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Z0103MNT1G
Littelfuse Inc.
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T835-600B-TR
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2N6073BG
Littelfuse Inc.
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2N6075BG
Littelfuse Inc.
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BTA08-600CWRG
STMicroelectronics
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T835H-6G-TR
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BTA16-800BRG
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MAC4DHMT4G
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