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STMicroelectronics TS420-600H
- Part No.:
- TS420-600H
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Datasheet:
-
TS420-600H.pdf
- Description:
- SCR 600V 4A IPAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,151
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Product details
Overview
TS420-600H from STMicroelectronics is a sensitive-gate 4 A, 600 V RMS silicon-controlled rectifier (SCR) in IPAK package. It features ultra-low 200 µA max gate trigger current (IGT), 0.8 V max gate trigger voltage (VGT), and 5 V/µs min dV/dt immunity at 125 °C - enabling reliable triggering with minimal drive circuitry in space-constrained motor control and crowbar protection applications.
For engineers reviewing the TS420-600H datasheet, TS420-600H pinout, TS420-600H application, or TS420-600H equivalent, key selection criteria include gate sensitivity (≤200 µA), thermal resistance (Rth(j-c) = 3.0 °C/W), peak surge rating (30 A @ 10 ms), holding current (≤5 mA), and IPAK mechanical compatibility with TO-220 footprint constraints.
Technical Context
The TS420-600H operates as a unidirectional thyristor with gate-controlled turn-on and natural commutation. Its low IGT (200 µA max) and high dV/dt immunity (5 V/µs min at Tj = 125 °C) allow direct drive from microcontroller GPIOs or optocouplers without external amplification.
It supports 180° conduction-angle operation up to 4 A RMS at TC = 115 °C, with critical design parameters including on-state voltage (1.6 V max at 8 A), dynamic resistance (90 mΩ max), and junction-to-case thermal resistance (3.0 °C/W), making it suitable for thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 4 A RMS on-state current at TC = 115 °C - defines continuous power-handling capability in heatsink-limited designs |
| VDRM / VRRM | 600 V repetitive peak off-state voltage - sets maximum AC line or DC bus blocking rating |
| IGT (max) | 200 µA at VD = 12 V - enables direct MCU/optocoupler gate drive without buffer transistors |
| dV/dt (min) | 5 V/µs at Tj = 125 °C - ensures noise immunity against fast transients in motor or SMPS environments |
| Rth(j-c) | 3.0 °C/W - allows precise junction temperature estimation when mounted on heatsink or copper plane |
| VTM (max) | 1.6 V at ITM = 8 A - determines conduction loss and thermal dissipation under load |
| IL (max) | 6 mA latching current - defines minimum anode current required to sustain conduction after gate pulse |
Pinout & Package
TS420-600H uses the IPAK (TO-251AA) package: 3-terminal, single-ended leadframe, isolated tab (anode-connected), with 0.4 g mass and recommended torque of 0.4–0.6 N·m.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Tab) | Main current path input | Electrically connected to metal tab; requires insulated mounting if not referenced to system ground |
| Cathode | Main current path output | Low-impedance return path; carries full load current; PCB trace must handle ≥4 A RMS |
| Gate | Trigger control terminal | Sensitive input requiring ≤200 µA; must be protected from ESD and dv/dt-induced false turn-on |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low gate trigger current | 200 µA max - eliminates need for gate driver stages in battery-powered or low-power control circuits |
| High dV/dt immunity | 5 V/µs min at 125 °C - prevents spurious turn-on during switching transients in inductive loads |
| Optimized thermal performance | Rth(j-c) = 3.0 °C/W - enables compact thermal design with minimal heatsinking in IPAK form factor |
| Robust surge capability | 30 A non-repetitive surge (10 ms) - withstands motor startup currents and short-circuit events |
| ECOPACK® compliance | Lead-free, RoHS-compliant, UL 94 V0 epoxy - meets industrial and consumer environmental requirements |
Applications
| Power Tool Motor Control | Kitchen Appliance Speed Regulation |
|---|---|
Use Scenario: Variable-speed universal motor control in cordless drills and sanders using phase-angle AC triggering. IC Role / Device Role / Timing Role: Main power switch triggered by zero-crossing synchronized gate pulses to regulate average motor torque. Use Value: 200 µA IGT enables direct drive from low-current MCU timers or optocouplers, reducing BOM count and board area. | Use Scenario: Fan speed and heating element duty control in blenders, coffee makers, and food processors. IC Role / Device Role / Timing Role: Line-synchronized SCR switch controlling RMS power delivered to resistive or inductive loads. Use Value: 5 V/µs dV/dt immunity prevents false triggering from EMI generated by brushed motors and relay coils. |
| Low-Power Supply Crowbar Protection | Industrial Lighting Dimming |
Use Scenario: Overvoltage shutdown circuit clamping DC output of 24 V SMPS or linear regulators during fault conditions. IC Role / Device Role / Timing Role: Fast-acting crowbar device triggered by comparator-driven gate pulse to short output to ground. Use Value: 0.5 µs typical gate turn-on time ensures sub-microsecond response to overvoltage events. | Use Scenario: Phase-cut dimming control for LED drivers or magnetic low-voltage transformers in commercial lighting. IC Role / Device Role / Timing Role: Leading-edge AC switch synchronizing conduction angle with line voltage zero-crossing. Use Value: 6 mA max latching current ensures stable hold-on even with low-load leakage paths in transformer-coupled outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SCR switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BT169G-650R | 4 A RMS, 650 V VDRM, IGT = 500 µA max, Rth(j-c) = 5.0 °C/W | Higher gate drive requirement; lower thermal efficiency | Select when higher blocking voltage margin is needed and gate drive >500 µA is available |
| TYN612 | 12 A RMS, 600 V VDRM, IGT = 50 mA max, Rth(j-c) = 1.5 °C/W | Higher current rating but 250× higher IGT; requires gate buffer | Select for higher-power systems where gate drive capability supports discrete transistor buffering |
Compared with BT169G-650R and TYN612, the TS420-600H uniquely balances ultra-low gate sensitivity (200 µA), 600 V blocking, and IPAK thermal performance (3.0 °C/W), making it optimal for compact, low-drive, medium-power AC switching where gate drive resources are constrained.
Availability
TS420-600H is available at Aetrix Electronics and suitable for motor control in power tools, crowbar protection in low-power supplies, and phase-angle dimming in lighting systems requiring stable component supply and long-term manufacturability.
Supply support for TS420-600H 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, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.
The TS420 belongs to ST's high-sensitivity SCR product line, engineered specifically for applications where gate drive current is severely limited - such as battery-operated tools, energy-efficient appliances, and compact power protection circuits.
FAQ
What is the maximum junction temperature for continuous operation?
The TS420-600H has a maximum operating junction temperature of +125 °C. Continuous operation at this limit requires maintaining case temperature ≤115 °C per the IT(RMS) derating curve, with thermal design ensuring Rth(j-c) × Pdiss + TC ≤ 125 °C. Exceeding this risks irreversible parametric shift or latch-up failure.
Can TS420-600H be used in DC switching applications?
No - the TS420-600H is a half-wave SCR requiring natural current zero-crossing to commutate. In pure DC circuits, it will remain latched after triggering unless externally forced off via series switch or current interruption. It is designed exclusively for AC or pulsating unidirectional waveforms.
Is the IPAK tab electrically isolated?
No - the metal tab of the TS420-600H IPAK package is internally connected to the anode terminal. Electrical isolation from the heatsink or PCB ground plane must be achieved using insulating washers or thermal pads rated for ≥600 V working voltage and appropriate creepage/clearance.
What gate resistor value is recommended for reliable triggering?
A 1 kΩ gate resistor is specified in the datasheet for timing measurements (e.g., tGT = 0.5 µs). For robust operation, use 470 Ω to 1 kΩ in series with the gate to limit peak IGM (1.2 A) while maintaining sufficient dIg/dt for fast turn-on; values >2.2 kΩ risk marginal triggering at high temperature or low VDD.
TS420-600H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Packaging:
- Tube
- Product Status:
- Active
- Voltage - Off State:
- 600 V
- Voltage - Gate Trigger (Vgt) (Max):
- 800 mV
- Current - Gate Trigger (Igt) (Max):
- 200 µA
- Voltage - On State (Vtm) (Max):
- 1.6 V
- Current - On State (It (AV)) (Max):
- 2.5 A
- Current - On State (It (RMS)) (Max):
- 4 A
- Current - Hold (Ih) (Max):
- 5 mA
- Current - Off State (Max):
- 5 µA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 30A, 33A
- SCR Type:
- Sensitive Gate
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-251 (IPAK)
TS420-600H FAQ
1.How can I place an order for TS420-600H through Aetrix?
Please submit a Request for Quotation (RFQ) for TS420-600H 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 TS420-600H reliable?
The price and inventory of TS420-600H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS420-600H is usually 5 days.
3.What payment methods are accepted for TS420-600H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS420-600H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS420-600H?
TS420-600H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS420-600H 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 TS420-600H?
For technical support, including TS420-600H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS420-600H requirements.
6.How does Aetrix verify that TS420-600H is sourced from the original manufacturer or authorized distributors?
All TS420-600H 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 TS420-600H meets industry standards.
7.What is the process for return or replacement of TS420-600H?
All TS420-600H units undergo pre-shipment inspection (PSI). If there is an issue with TS420-600H, 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 TS420-600H part is unused and in its original packaging.
Return procedure for TS420-600H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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