My Inquiry
My Account
STMicroelectronics BTA25-600B
- Part No.:
- BTA25-600B
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- RD91-3 (Insulated)
- Datasheet:
-
BTA25-600B.pdf
- Description:
- TRIAC 600V 25A RD91
- Quantity:
- Payment:
- Shipping:
Inventory:21
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BTA25-600B from STMicroelectronics is a 25 A RMS, 600 V repetitive peak off-state voltage (VDRM), standard 4-quadrant triac in TO-220AB insulated package, designed for phase-controlled AC switching in motor speed controllers and light dimmers with gate trigger current of 50 mA and critical dV/dt rating of 500 V/µs.
For engineers reviewing the BTA25-600B datasheet, BTA25-600B pinout, BTA25-600B application, or BTA25-600B equivalent, this device supports robust snubberless operation in high-noise industrial environments, delivers 250 A non-repetitive surge current at 50 Hz, and maintains stable latching current (IL ≤ 70 mA) across -40 °C to +125 °C junction temperature range.
Technical Context
This triac operates in all four quadrants with symmetrical triggering characteristics, enabling bidirectional conduction control without external polarity management. Its gate structure supports reliable turn-on under low-dV/dt conditions while sustaining 500 V/µs critical off-state voltage rise rate at 125 °C junction temperature.
The device features low on-state voltage (VTM ≤ 1.55 V at 35 A, 25 °C) and dynamic resistance (RD ≤ 16 mΩ), minimizing conduction losses in continuous-duty heating regulation and static relay applications. Thermal resistance from junction-to-case is 1.7 °C/W, optimized for heatsink-mounted TO-220AB insulated mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RMS On-State Current | 25 A - Sustains full sine-wave load current at Tc = 75 °C without derating in heatsinked configurations |
| VDRM / VRRM | 600 V - Blocks 600 V peak AC line voltage in both directions, suitable for 230 VAC mains systems |
| IGT (Max) | 50 mA - Gate trigger current threshold enabling direct drive from microcontroller GPIO or optocoupler outputs |
| dV/dt (Min) | 500 V/µs - Resists false triggering from fast transient noise on AC lines without snubber network |
| ITSM (50 Hz) | 250 A - Withstands 20 ms half-cycle surge, supporting motor inrush and heater cold-start currents |
| VTM (Max) | 1.55 V - Low conduction drop reduces power dissipation to ≤39 W at 25 A, easing thermal design |
| Rth(j-c) | 1.7 °C/W - Enables efficient heat transfer to heatsink, limiting junction rise to ≤42.5 °C at 25 W dissipation |
Pinout & Package
TO-220AB insulated package with creepage/clearance enhanced for reinforced insulation per UL1557 (file #81734); tab electrically isolated from A2 terminal; 2.5 kV RMS insulation withstand voltage for 1 minute.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main Terminal 1 | Reference terminal for gate triggering; connects to load return path in phase-control circuits |
| A2 (MT2) | Main Terminal 2 | High-side AC line connection; electrically isolated from tab in insulated variant |
| G | Gate | Control input accepting 50 mA pulse to initiate conduction in any quadrant; referenced to A1 |
Key Features
| Feature | Design Value |
|---|---|
| UL1557 Recognition | File #81734 certified - meets reinforced insulation requirements for safety-critical AC mains interfaces |
| Snubberless 4-Quadrant Operation | Guaranteed dV/dt immunity ≥500 V/µs without external RC network, reducing BOM count and board space |
| RoHS & ECOPACK2 Compliance | Halogen-free molding compound, lead-free terminations, UL94 V0 flammability - compliant with EU environmental directives |
| High Surge Robustness | 250 A non-repetitive surge (50 Hz, 20 ms) supports repeated motor starting and resistive load cycling |
Applications
| Light Dimming Systems | Induction Motor Starters |
|---|---|
|
Use Scenario: Phase-angle controlled 230 VAC incandescent/halogen lamp dimming in residential and commercial lighting. IC Role / Device Role / Timing Role: Main AC power switch triggered by zero-crossing synchronized PWM signal to adjust conduction angle. Use Value: Eliminates need for snubber components while maintaining EMI compliance and flicker-free dimming down to 5% brightness. |
Use Scenario: Single-phase induction motor soft-start in HVAC blowers and pump controllers. IC Role / Device Role / Timing Role: Bidirectional AC switch enabling gradual voltage ramp-up during startup to limit inrush current. Use Value: Withstands 250 A surge for 20 ms, preventing contact welding and extending mechanical relay lifetime. |
| Static Relays | Heating Element Regulators |
|
Use Scenario: Solid-state replacement for electromechanical relays in PLC output modules and industrial I/O cards. IC Role / Device Role / Timing Role: Isolated AC load switch controlled via optocoupled gate driver for galvanic separation. Use Value: 2.5 kV insulation rating enables safe interface between 24 VDC logic and 230 VAC loads without additional isolation barriers. |
Use Scenario: Proportional on/off control of resistive heating elements in ovens, soldering stations, and process heaters. IC Role / Device Role / Timing Role: High-current AC switch modulated via time-proportioned control (e.g., 2 s on / 8 s off). Use Value: 25 A RMS rating supports up to 5.75 kW at 230 VAC, eliminating need for parallel devices in mid-power heating systems. |
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 |
|---|---|---|---|
| BTB24-600B | TO-220AB uninsulated package; Rth(j-c) = 0.8 °C/W vs. 1.7 °C/W; no isolation between tab and A2 | Requires conductive heatsink isolation; preferred where thermal performance outweighs safety insulation needs | Select when mounting to grounded metal chassis with insulating pad; avoid in double-insulated end equipment |
| T2535-600G | D²PAK surface-mount package; 35 mA IGT (snubberless 3Q); lower IT(RMS) derating above 75 °C ambient | Suitable for compact PCB layouts but requires larger copper pour for thermal management | Choose for automated assembly and space-constrained designs; verify PCB thermal relief per Figure 11 (DS2112) |
Compared with BTB24-600B and T2535-600G, BTA25-600B uniquely combines reinforced insulation, 25 A RMS capability at 75 °C case temperature, and 4-quadrant compatibility-making it optimal for safety-certified, manually wired, medium-power AC control where creepage distance and user-accessible isolation are mandatory.
Availability
BTA25-600B is available at Aetrix Electronics and suitable for light dimming systems, induction motor starters, static relays, and heating element regulators requiring stable component supply across industrial OEM production cycles.
Supply support for BTA25-600B 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, delivering intelligent power, analog, MEMS, and microcontroller solutions for industrial, automotive, and consumer markets.
BTA25-600B belongs to ST's high-power discrete triac family engineered specifically for robust, snubberless AC mains switching in safety-critical industrial controls and home appliances.
FAQ
What is the maximum junction temperature for continuous operation?
The BTA25-600B has an operating junction temperature range of -40 °C to +125 °C. Continuous operation must ensure Tj does not exceed +125 °C under worst-case conduction and ambient conditions, verified using Rth(j-c) = 1.7 °C/W and measured case temperature.
Is a heatsink required for 25 A RMS operation?
Yes - at 25 A RMS, power dissipation reaches ~39 W (VTM × IT). With Rth(j-c) = 1.7 °C/W, even a modest 20 °C rise above ambient requires active or substantial passive heatsinking to maintain Tj ≤ 125 °C; derating applies above Tc = 75 °C.
Can BTA25-600B replace BTA16-600B in existing designs?
No - although both share TO-220AB insulated packaging, BTA25-600B has higher IT(RMS) (25 A vs. 16 A), higher ITSM (250 A vs. 160 A), and different gate sensitivity (50 mA vs. 35 mA), requiring verification of drive circuit compatibility and thermal margin in the target layout.
Does this part meet IEC 60747-6 for triacs?
Yes - BTA25-600B complies with IEC 60747-6 Edition 3.0 (2020) for semiconductor devices - discrete devices - thyristors, as confirmed by ST's qualification reports and UL1557 recognition (file #81734) covering insulation, surge, and safety testing.
BTA25-600B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- RD91-3 (Insulated)
- Packaging:
- Bulk
- Product Status:
- Active
- Triac Type:
- Standard
- Voltage - Off State:
- 600 V
- Current - On State (It (RMS)) (Max):
- 25 A
- Voltage - Gate Trigger (Vgt) (Max):
- 1.3 V
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 250A, 260A
- Current - Gate Trigger (Igt) (Max):
- 50 mA
- Current - Hold (Ih) (Max):
- 80 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- RD91
BTA25-600B FAQ
1.How can I place an order for BTA25-600B through Aetrix?
Please submit a Request for Quotation (RFQ) for BTA25-600B 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 BTA25-600B reliable?
The price and inventory of BTA25-600B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTA25-600B is usually 5 days.
3.What payment methods are accepted for BTA25-600B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTA25-600B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTA25-600B?
BTA25-600B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTA25-600B 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 BTA25-600B?
For technical support, including BTA25-600B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTA25-600B requirements.
6.How does Aetrix verify that BTA25-600B is sourced from the original manufacturer or authorized distributors?
All BTA25-600B 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 BTA25-600B meets industry standards.
7.What is the process for return or replacement of BTA25-600B?
All BTA25-600B units undergo pre-shipment inspection (PSI). If there is an issue with BTA25-600B, 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 BTA25-600B part is unused and in its original packaging.
Return procedure for BTA25-600B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BTA25-600B Tags
-
Z0103NN5AA4
STMicroelectronics
-
Z0107MNT1G
Littelfuse Inc.
-
Z0103MNT1G
Littelfuse Inc.
;;2.jpg)
-
T405-800B-TR
STMicroelectronics
-
T835-600B-TR
STMicroelectronics
.JPG)
-
2N6073BG
Littelfuse Inc.
-
2N6075BG
Littelfuse Inc.
-
BTA08-600CWRG
STMicroelectronics
-
T835H-6G-TR
STMicroelectronics
-
BTA16-800BRG
STMicroelectronics
-
T1210-800G-TR
STMicroelectronics
-
MAC4DHMT4G
Littelfuse Inc.
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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…
