My Inquiry
My Account
STMicroelectronics BTA24-800CWRG
- Part No.:
- BTA24-800CWRG
- Manufacturer:
- STMicroelectronics
- Category:
- TRIACs
- Package:
- TO-220-3
- Datasheet:
-
BTA24-800CWRG.pdf
- Description:
- TRIAC ALTERNISTOR 800V 25A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:5,697
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BTA24-800CWRG from STMicroelectronics is a snubberless 3-quadrant triac in TO-220AB insulated package, rated for 25 A RMS on-state current and 800 V repetitive peak off-state voltage, with 35 mA maximum gate trigger current (IGT) and 500 V/µs minimum critical dV/dt at 125 °C - used in AC phase control for motor speed controllers and heating regulation circuits.
For engineers reviewing the BTA24-800CWRG datasheet, BTA24-800CWRG pinout, BTA24-800CWRG application, or BTA24-800CWRG equivalent, key selection criteria include snubberless 3Q operation, insulated TO-220AB thermal performance (Rth(j-c) = 1.7 °C/W), low IGT (35 mA), high commutation robustness (dI/dt ≥ 13 A/ms), and UL1557 recognition for static relay designs.
Technical Context
This triac operates in three quadrants (I, II, III) without requiring external snubber networks due to its enhanced dV/dt immunity (≥500 V/µs at Tj = 125 °C) and high commutation capability (dI/dt ≥ 13 A/ms). Its insulated TO-220AB package enables direct mounting to grounded heatsinks while maintaining 2.5 kV RMS insulation voltage for safety-critical AC mains interfaces.
Designed for zero-crossing or phase-angle control, it delivers stable latching (IL ≤ 70 mA) and holding (IH ≤ 50 mA) across –40 to +125 °C junction temperature, with on-state voltage as low as 0.85 V at 125 °C and dynamic resistance of 16 mΩ - enabling efficient power switching in 50/60 Hz AC loads up to 25 A RMS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 25 A - supports continuous AC load current up to 25 A RMS in full-sine-wave operation at Tc = 75 °C |
| VDRM / VRRM | 800 V - blocks 800 V repetitive peak off-state voltage, suitable for 230 VAC + margin applications |
| IGT (max) | 35 mA - low gate drive requirement enables direct interface with microcontrollers or optocouplers |
| dV/dt (min) | 500 V/µs - snubberless operation in noisy AC environments without false triggering |
| Rth(j-c) | 1.7 °C/W - insulated TO-220AB package allows safe thermal coupling to grounded heatsinks |
| VINS | 2.5 kV RMS - 1-minute insulation withstand voltage meets reinforced isolation requirements |
| ITSM (tp=20 ms) | 250 A - handles short-duration inrush currents during motor startup or cold-resistor energization |
Pinout & Package
TO-220AB insulated package with creepage/clearance optimized for 2.5 kV RMS isolation; tab is electrically isolated from A2 terminal and rated for direct mounting on grounded metal heatsinks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (MT1) | Main Terminal 1 | Reference terminal for gate trigger; connected to load return path in standard triac configurations |
| A2 (MT2) | Main Terminal 2 | High-side AC line connection; carries full load current and defines polarity reference for gate drive |
| G | Gate | Control input accepting 35 mA max trigger pulse; triggers conduction between A1 and A2 in quadrants I, II, III |
Key Features
| Feature | Design Value |
|---|---|
| Snubberless 3-quadrant operation | Enables elimination of RC snubber networks in phase-control dimmers and motor controllers, reducing BOM count and board space |
| UL1557 recognition | Validated insulation system (file #81734) supports safety-certified static relay and industrial control designs |
| Low thermal resistance (insulated) | Rth(j-c) = 1.7 °C/W allows 25 A RMS operation with modest heatsinking at Tc = 75 °C |
| High dI/dt capability | ≥13 A/ms critical rate of decrease ensures reliable turn-off under inductive load conditions without commutation failure |
| RoHS & ECOPACK2 compliant | Halogen-free molding compound (UL94 V0) and lead-free terminations meet global environmental compliance mandates |
Applications
| Heating Regulation | Light Dimming |
|---|---|
|
Use Scenario: Precise temperature control in electric ovens, soldering irons, and HVAC duct heaters using phase-angle modulation. IC Role / Device Role / Timing Role: Main AC power switch executing phase-controlled conduction per microcontroller PWM timing signal. Use Value: Snubberless operation eliminates capacitor stress and EMI filtering overhead while maintaining stable zero-crossing synchronization. |
Use Scenario: Residential and commercial incandescent/halogen lamp dimming with smooth brightness adjustment. IC Role / Device Role / Timing Role: Bidirectional AC switch triggered at variable phase angles relative to AC zero-crossing point. Use Value: 35 mA IGT enables direct drive from low-power optocouplers (e.g., MOC3021), reducing gate driver complexity. |
| Induction Motor Starting | Static Relay Replacement |
|
Use Scenario: Soft-start control for single-phase induction motors in pumps, fans, and compressors. IC Role / Device Role / Timing Role: High-current AC switch managing inrush-limited startup via ramped conduction angle. Use Value: 250 A non-repetitive surge rating (tp = 20 ms) accommodates locked-rotor currents without device failure. |
Use Scenario: Solid-state replacement of electromechanical relays in programmable logic controllers and building automation panels. IC Role / Device Role / Timing Role: Isolated AC load switch providing contactless, bounce-free, and maintenance-free operation. Use Value: 2.5 kV RMS insulation and UL1557 recognition ensure compliance with IEC 61810-1 relay safety standards. |
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 |
|---|---|---|---|
| BTB24-800CWRG | Same 25 A / 800 V / 35 mA snubberless spec, but TO-220AB uninsulated package (Rth(j-c) = 0.8 °C/W) | Requires insulated mounting hardware when heatsink is grounded; higher thermal efficiency but lower isolation safety margin | Select when thermal performance is prioritized over reinforced insulation and board-level grounding constraints allow |
| T2535-800G | D²PAK surface-mount package, same 25 A / 800 V / 35 mA snubberless rating, Rth(j-c) = 0.8 °C/W, no insulation | Suitable for automated SMT assembly and compact PCB layouts; lacks 2.5 kV isolation and requires external isolation barriers | Select for high-volume, space-constrained designs where manual heatsink isolation is impractical and safety certification permits |
Compared with BTB24-800CWRG and T2535-800G, BTA24-800CWRG uniquely combines snubberless 3Q operation with certified 2.5 kV insulation in a through-hole package - making it the only choice for safety-critical, grounded-heatsink static relay implementations requiring UL1557 compliance.
Availability
BTA24-800CWRG is available at Aetrix Electronics and suitable for heating regulation, light dimming, induction motor starting, and static relay replacement requiring stable component supply, long lifecycle support, and traceable sourcing for industrial control systems.
Supply support for BTA24-800CWRG 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.
BTA24 belongs to ST's high-power discrete triac product line, engineered specifically for robust, snubberless AC power control in safety-certified industrial and appliance applications.
FAQ
What is the difference between BTA24-800CWRG and BTA24-800BWRG?
BTA24-800CWRG is a snubberless 3-quadrant triac with 35 mA maximum gate trigger current (IGT), whereas BTA24-800BWRG is a standard 4-quadrant device with 50 mA IGT. The 'C' suffix denotes lower gate sensitivity and enhanced dV/dt immunity (500 V/µs vs. same value but different test conditions), enabling snubberless operation in noisy AC environments.
Can BTA24-800CWRG be used in 4-quadrant triggering applications?
No - BTA24-800CWRG is specified and characterized only for 3-quadrant operation (quadrants I, II, III). It is not guaranteed to trigger reliably in quadrant IV (A2 negative, gate positive), unlike standard 4Q variants such as BTA24-800BWRG. Using it in QIV may result in inconsistent turn-on or premature failure.
What is the maximum recommended case temperature for continuous 25 A RMS operation?
The datasheet specifies IT(RMS) = 25 A at Tc = 75 °C for the insulated TO-220AB package. Exceeding 75 °C case temperature reduces allowable RMS current linearly per Figure 2; sustained operation above 75 °C without derating violates absolute maximum ratings and risks thermal runaway or bond-wire failure.
Does BTA24-800CWRG require a heat sink in all applications?
Yes - even at 25 A RMS, junction-to-case thermal resistance is 1.7 °C/W, and power dissipation exceeds 2 W at typical on-state voltage. Without a heatsink, ambient temperature rise would exceed safe limits. ST recommends a minimum 10 cm² copper pour or dedicated aluminum heatsink for reliable long-term operation.
BTA24-800CWRG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- Snubberless™
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Triac Type:
- Alternistor - Snubberless
- Voltage - Off State:
- 800 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):
- 35 mA
- Current - Hold (Ih) (Max):
- 50 mA
- Configuration:
- Single
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
BTA24-800CWRG FAQ
1.How can I place an order for BTA24-800CWRG through Aetrix?
Please submit a Request for Quotation (RFQ) for BTA24-800CWRG 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 BTA24-800CWRG reliable?
The price and inventory of BTA24-800CWRG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BTA24-800CWRG is usually 5 days.
3.What payment methods are accepted for BTA24-800CWRG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BTA24-800CWRG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BTA24-800CWRG?
BTA24-800CWRG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BTA24-800CWRG 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 BTA24-800CWRG?
For technical support, including BTA24-800CWRG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BTA24-800CWRG requirements.
6.How does Aetrix verify that BTA24-800CWRG is sourced from the original manufacturer or authorized distributors?
All BTA24-800CWRG 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 BTA24-800CWRG meets industry standards.
7.What is the process for return or replacement of BTA24-800CWRG?
All BTA24-800CWRG units undergo pre-shipment inspection (PSI). If there is an issue with BTA24-800CWRG, 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 BTA24-800CWRG part is unused and in its original packaging.
Return procedure for BTA24-800CWRG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BTA24-800CWRG 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
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…
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…
