My Inquiry
My Account
STMicroelectronics TS420-600B-TR
;;2.jpg)
- Part No.:
- TS420-600B-TR
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
TS420-600B-TR.pdf
- Description:
- SCR 600V 4A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:18,788
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TS420-600B-TR from STMicroelectronics is a sensitive-gate 4 A, 600 V RMS silicon-controlled rectifier (SCR) in DPAK surface-mount 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 AC control applications.
For engineers reviewing the TS420-600B-TR datasheet, TS420-600B-TR pinout, TS420-600B-TR application, or TS420-600B-TR equivalent, key selection criteria include gate sensitivity under low-current drive, thermal resistance (Rth(j-c) = 3.0 °C/W), surge robustness (30 A non-repetitive peak on-state current), and DPAK footprint compatibility for automated SMT assembly.
Technical Context
This SCR operates as a latching unidirectional AC switch with gate-controlled turn-on and natural commutation. Its 0.2 mA nominal IGT and 5 mA max holding current (IH) support direct microcontroller GPIO driving without external amplification. The device sustains 600 V repetitive peak off-state voltage (VDRM/VRRM) and exhibits 50 A/µs critical rate of rise of on-state current (dl/dt) at 125 °C.
Thermal design is enabled by its 3.0 °C/W junction-to-case thermal resistance and DPAK package's copper tab for heatsinking. Electrical timing includes 0.5 µs typical gate-controlled turn-on time (tGT) and 60 µs typical circuit-controlled turn-off time (tQ) under defined load and voltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 4 A RMS on-state current at TC = 115 °C - supports continuous 50/60 Hz AC loads up to ~550 W resistive. |
| VDRM / VRRM | 600 V repetitive peak off-state voltage - suitable for 230 VAC mains applications with safety margin. |
| IGT (max) | 200 µA at VD = 12 V, RL = 33 Ω - enables direct drive from low-power logic or MCU pins without buffer stages. |
| dV/dt (min) | 5 V/µs at Tj = 125 °C, RGK = 220 Ω - ensures noise immunity against false triggering during high dv/dt transients. |
| Rth(j-c) | 3.0 °C/W - allows efficient heat transfer to PCB copper or external heatsink via DPAK tab. |
| tGT (typ) | 0.5 µs at ITM = 10 A, VD = VDRM(max), IGT = 10 mA - supports precise phase-angle control in fast-switching dimmers. |
| VTM (max) | 1.6 V at ITM = 8 A, tP = 380 µs - defines conduction loss and power dissipation under full-load conditions. |
Pinout & Package
The TS420-600B-TR uses a 3-pin DPAK (TO-252) surface-mount package with exposed cathode tab for thermal and electrical connection. Pin 1 (Anode), Pin 2 (Cathode), Pin 3 (Gate) are arranged linearly; the metal tab is electrically connected to the Cathode and serves as primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Main current entry terminal during forward conduction | Connected to AC line or load side; must withstand full VDRM and IT(RMS) stress. |
| Cathode (Pin 2 + Tab) | Main current exit terminal and reference node for gate drive | Tab provides low-inductance, low-resistance return path and thermal interface to PCB copper. |
| Gate (Pin 3) | Control input for triggering conduction | Requires only 200 µA to initiate latching; polarity-sensitive (positive w.r.t. cathode). |
Key Features
| Feature | Design Value |
|---|---|
| Sensitive gate triggering | 200 µA max IGT enables direct MCU GPIO control without driver ICs or discrete transistors. |
| DPAK surface-mount package | Compact 6.2 mm × 6.7 mm footprint with thermal tab - optimized for automated assembly and board-level heat spreading. |
| High dV/dt immunity | 5 V/µs minimum at 125 °C ensures stable operation in noisy industrial AC environments with EMI or switching transients. |
| Robust surge capability | 30 A non-repetitive surge current (tp = 10 ms) supports motor startup and transient overload protection. |
| Lead-free & RoHS-compliant | ECOPACK®-qualified DPAK meets UL 94 V0 flammability and environmental compliance requirements. |
Applications
| Handheld Power Tools | Kitchen Appliance Motor Control |
|---|---|
Use Scenario: Variable-speed trigger control in corded drills and sanders using phase-cut AC supply. IC Role / Device Role / Timing Role: Main AC power switch triggered by zero-crossing synchronized PWM gate pulses. Use Value: Ultra-low 200 µA IGT eliminates need for gate driver ICs, reducing BOM count and PCB area by >30% vs. standard SCRs. |
Use Scenario: Speed and power regulation in blender, mixer, and food processor universal motors. IC Role / Device Role / Timing Role: Bidirectional phase-control switch in TRIAC-like configuration (with external diode). Use Value: 600 V VDRM supports 230 VAC mains with 2× safety margin; DPAK thermal performance sustains 4 A RMS in sealed enclosures. |
| Low-Power Crowbar Protection | Industrial AC Solid-State Relays |
Use Scenario: Overvoltage shutdown in 12–24 VDC regulated supplies using transformer-coupled detection. IC Role / Device Role / Timing Role: Fast-acting crowbar element triggered by comparator output into gate. Use Value: 0.5 µs tGT ensures sub-microsecond response to overvoltage events, limiting energy delivered to downstream circuits. |
Use Scenario: Compact SSR modules for PLC output stages and HVAC zone control. IC Role / Device Role / Timing Role: Primary switching element in opto-isolated back-to-back SCR topology. Use Value: 3.0 °C/W Rth(j-c) allows 4 A RMS operation with minimal heatsink - enabling <10 cm² module footprints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SCR switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BT169G-TR | Lower VDRM (400 V), higher IGT (500 µA max), TO-92 package | Limited to 115 VAC systems; unsuitable for 230 VAC mains or high-surge environments | Select only for low-voltage, low-power signal-level switching where DPAK thermal performance is unnecessary. |
| TYN612RG | Same 600 V VDRM but higher IGT (10 mA max), TO-220 package, 12 A IT(RMS) | Requires gate driver stage; larger footprint and higher thermal mass limit switching speed | Prefer when higher current rating and ruggedness outweigh gate drive simplicity and size constraints. |
Compared with BT169G-TR and TYN612RG, TS420-600B-TR uniquely balances 600 V rating, 200 µA gate sensitivity, and DPAK thermal efficiency - making it optimal for compact, low-drive AC controllers where space, power, and reliability intersect.
Availability
TS420-600B-TR is available at Aetrix Electronics and suitable for handheld power tools, kitchen appliance motor control, and low-power crowbar protection requiring stable component supply and long-term manufacturability.
Supply support for TS420-600B-TR 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, MCU, and sensor solutions for industrial, automotive, and consumer markets.
The TS420 belongs to ST's high-sensitivity SCR product line, engineered specifically for AC phase-control applications where minimal gate drive capability and compact packaging are critical - such as battery-charger feedback loops, small-appliance speed controls, and solid-state relay modules.
FAQ
Is TS420-600B-TR compatible with standard DPAK reflow profiles?
Yes. TS420-600B-TR is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260 °C and 60-second duration above 217 °C. Its ECOPACK®-compliant epoxy meets UL 94 V0 flammability and passes MSL-1 moisture sensitivity classification.
Can TS420-600B-TR replace a TRIAC in AC dimming circuits?
No - it is a unidirectional SCR and conducts only during positive half-cycles. For full-wave AC control, two TS420 devices in inverse-parallel configuration or a dedicated TRIAC (e.g., BTA16) is required. Its gate sensitivity remains advantageous in half-wave or DC-biased AC topologies.
What is the maximum recommended gate-cathode resistance (RGK) for reliable triggering?
Per Figure 6 and Table 4, RGK ≤ 1 kΩ ensures IH remains ≤ 5 mA across -40 to 125 °C. At RGK = 220 Ω (datasheet test condition), dV/dt immunity reaches 5 V/µs minimum. Higher RGK values degrade noise immunity and may cause false triggering at elevated temperature.
Does TS420-600B-TR require snubber circuitry in inductive load applications?
Yes - for inductive loads (e.g., motors, solenoids), a series RC snubber across anode-cathode is recommended to suppress dV/dt transients exceeding 5 V/µs. Typical values are 100 Ω + 100 nF, selected per load L/R ratio and operating frequency to limit voltage overshoot below 600 V.
TS420-600B-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- DPAK
TS420-600B-TR FAQ
1.How can I place an order for TS420-600B-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for TS420-600B-TR 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 TS420-600B-TR reliable?
The price and inventory of TS420-600B-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS420-600B-TR is usually 5 days.
3.What payment methods are accepted for TS420-600B-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS420-600B-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS420-600B-TR?
TS420-600B-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS420-600B-TR 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 TS420-600B-TR?
For technical support, including TS420-600B-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS420-600B-TR requirements.
6.How does Aetrix verify that TS420-600B-TR is sourced from the original manufacturer or authorized distributors?
All TS420-600B-TR 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 TS420-600B-TR meets industry standards.
7.What is the process for return or replacement of TS420-600B-TR?
All TS420-600B-TR units undergo pre-shipment inspection (PSI). If there is an issue with TS420-600B-TR, 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 TS420-600B-TR part is unused and in its original packaging.
Return procedure for TS420-600B-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS420-600B-TR Tags
-
MCR12DSNT4G
Littelfuse Inc.
-
2N6404G
Littelfuse Inc.
-
S4015LTP
Littelfuse Inc.
-
VS-25TTS12HM3
Vishay General Semiconductor - Diodes Division
-
S4020LTP
Littelfuse Inc.
-
MCR12MG
Littelfuse Inc.
-
MCR69-3G
Littelfuse Inc.
-
S8025LTP
Littelfuse Inc.
-
CMA30E1600PN
IXYS
-
S8016RATP
Littelfuse Inc.
-
TXN625RG
STMicroelectronics
.jpg)
-
SK055RTP
Littelfuse Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
