BTB24-600CW STMicroelectronics Triac A (Transistor Outline, Vertical) In Stock
BTB24-600CW is a 25 A, 600 V Snubberless triac in a TO-220AB package with 250 V/µs off-state dV/dt rating, designed for AC power control without external RC snubber networks. Available from stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- OBSOLETE
- Datasheet
- BTB24-600CW Datasheet PDF
- Category
- Triac A
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 25 A RMS on-state current and 600 V blocking voltage with Snubberless 250 V/µs dV/dt rating, eliminating the need for external RC snubber components in inductive load switching
- Low gate trigger current of 35 mA maximum and 1.5 V gate trigger voltage, allowing direct drive from optocouplers and low-power microcontroller gate driver circuits
- TO-220AB package with isolated tab option enabling direct heatsink mounting without electrical insulation pads, simplifying thermal management in motor control and dimmer designs
Applications
BTB24-600CW is used in AC motor soft-starters, industrial heater controllers, and lighting dimmer systems operating on 230 V AC mains where a 25 A triac capable of handling inductive loads without a snubber circuit reduces BOM cost and board complexity. Its 600 V blocking voltage provides a 2.6x safety margin over the 230 V peak mains voltage, meeting IEC 61010 clearance requirements for industrial control equipment. The TO-220AB package mounts directly to a chassis heatsink, making it suitable for panel-mount solid-state relay designs in HVAC and pump control applications.
Specifications
| YTEOL | 0 |
| Case Connection | MAIN TERMINAL 2 |
| Configuration | SINGLE |
| Critical Rate of Rise of Off-State Voltage-Min | 250V/us |
| DC Gate Trigger Current-Max | 35mA |
| DC Gate Trigger Voltage-Max | 1.5V |
| Holding Current-Max | 50mA |
| JEDEC-95 Code | TO-220AB |
| JESD-30 Code | R-PSFM-T3 |
| JESD-609 Code | e3 |
| Number of Elements | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Qualification Status | Not Qualified |
| RMS On-state Current-Max | 25A |
| Repetitive Peak Off-state Leakage Current-Max | 10 µA |
| Repetitive Peak Off-state Voltage | 600V |
| Surface Mount | NO |
| Terminal Finish | MATTE TIN |
| Terminal Form | THROUGH-HOLE |
| Terminal Position | SINGLE |
| Trigger Device Type | SNUBBERLESS TRIAC |
| Package | Transistor Outline, Vertical |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8541.30.00.80 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for BTB24-600CW:
STMicroelectronics Snubberless TRIAC, 600V V(DRM), 25A I(T)RMS, TO-220AB
Frequently Asked Questions
What makes BTB24-600CW a Snubberless triac and why does that matter for inductive load control?
BTB24-600CW carries the Snubberless designation because its 250 V/µs critical dV/dt rating is high enough to block the steep voltage transients generated by inductive loads such as motor windings and transformer primaries without false triggering. Standard triacs with dV/dt ratings below 100 V/µs require an external RC snubber network of typically 100 Ω and 10 nF to avoid nuisance triggering, adding two components per AC switch. The Snubberless BTB24-600CW eliminates this network, saving PCB space and reducing standby power loss.
How much gate current does BTB24-600CW require, and can a MOC3041 optocoupler drive it directly?
BTB24-600CW requires a maximum gate trigger current of 35 mA and a gate trigger voltage of 1.5 V. The MOC3041 Snubberless optocoupler triac driver outputs up to 1 A peak and includes a built-in zero-crossing detector, making it fully capable of driving BTB24-600CW's 35 mA gate directly from a 5 V or 3.3 V MCU signal with a series resistor of approximately 180 Ω to limit gate current to the required 35 mA threshold.
What continuous load current and voltage can BTB24-600CW handle for a 230 V single-phase motor starter?
BTB24-600CW is rated for 25 A RMS continuous on-state current and 600 V repetitive peak off-state voltage, supporting a 230 V AC motor with continuous shaft loads up to approximately 5.75 kW (25 A at 230 V). For soft-start applications with surge currents up to 3x rated load at startup, the device's non-repetitive surge current rating of typically 250 A for one half-cycle provides adequate margin without nuisance tripping.
How should thermal management be planned for BTB24-600CW in a 10 A continuous heater control application?
At 10 A continuous load, BTB24-600CW dissipates approximately 10 W based on a 1 V on-state voltage drop. With a junction-to-case thermal resistance of about 1 °C/W for the TO-220AB package, a heatsink with 5 °C/W thermal resistance keeps the junction at approximately 60 °C above ambient, well within the 125 °C maximum junction temperature rating. Mounting the tab directly to an aluminum chassis plate with thermal compound eliminates the need for an insulating pad in circuits where the heatsink is isolated from mains potential.
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