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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

NXP Semiconductors BT131-800E,412

Name: BT131-800E,412
Brand: NXP Semiconductors
SKU: BT131-800E,412
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BT131-800E,412

Manufacturer:: NXP Semiconductors

Category:: TRIACs

Package:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Datasheet:: BT131-800E,412.pdf

Description:: TRIAC SENS GATE 800V 1A TO92-3

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Product details

Overview

BT131-800E,412 from NXP Semiconductors is a planar passivated 4-quadrant triac in TO-92 (SOT54) package, designed for direct interfacing with microcontrollers and low-power gate drivers. It delivers 800 V repetitive peak off-state voltage, 1 A RMS on-state current, and ≤10 mA gate trigger current across all four quadrants - enabling compact, logic-compatible AC phase control in fan and motor circuits.

For engineers reviewing the BT131-800E,412 datasheet, BT131-800E,412 pinout, BT131-800E,412 application, or BT131-800E,412 equivalent, this part supports sensitive-gate triggering without external amplification, operates reliably up to 125 °C junction temperature, and maintains robust dV/dt immunity (50 V/µs) under high-temperature commutation conditions.

Technical Context

The BT131-800E,412 implements a planar passivated silicon structure optimized for voltage ruggedness and stable four-quadrant triggering. Its gate accepts logic-level drive (≤10 mA IGT) in T2+/G+, T2+/G−, T2−/G−, and T2−/G+ configurations, eliminating quadrant-specific biasing circuitry.

It sustains 800 V blocking capability while limiting on-state voltage to 1.5 V at 1.4 A, and features thermal resistance of 60 K/W (junction-to-lead, full cycle) for through-hole PCB mounting with 4 mm lead length - supporting continuous operation at ≤51 °C lead temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DRM	800 V - blocks full-wave 230 VAC mains with 2.7× safety margin
I_T(RMS)	1 A - supports continuous load switching up to ~230 W resistive or low-inductance motor loads
I_GT	≤10 mA max (all quadrants) - directly drivable by GPIO pins or open-collector logic outputs
dV/dt	50 V/µs - prevents false triggering during fast transients in noisy AC environments
T_j max	125 °C - enables operation in enclosed fan housings or thermally constrained enclosures
R_th(j-lead)	60 K/W (full cycle) - defines thermal derating curve for lead-temperature-limited design
V_T	1.5 V max at 1.4 A - limits conduction loss to ≤2.1 W, reducing heatsink requirements

Pinout & Package

Package: TO-92 (SOT54), plastic single-ended leaded through-hole package with 3 leads; body dimensions per IEC JEDEC outline SC-43A (L = 14.5 mm, D = 4.8 mm, E = 4.2 mm).

Pin/Terminal	Circuit Role	Design Meaning
1	T2	Main terminal 2 - connects to AC line (hot) side; carries full load current and defines reference for gate triggering polarity
2	G	Gate - receives low-current trigger signal; quadrant behavior determined by simultaneous polarity of T2 and G relative to T1
3	T1	Main terminal 1 - connects to load return (neutral) side; serves as common reference for gate drive and current path completion

Key Features

Feature	Design Value
Four-quadrant triggering	Enables gate control regardless of instantaneous AC polarity - eliminates need for external diodes or H-bridge gate drivers
Sensitive gate (≤10 mA I_GT)	Direct interface with 3.3 V/5 V microcontroller GPIOs without buffer transistors or level shifters
Planar passivation	Ensures long-term reliability under humidity, thermal cycling, and voltage stress in consumer-grade indoor environments
800 V V_DRM	Supports global 230 VAC mains (Europe, Asia, Africa) and 120 VAC with margin for surge events
125 °C maximum junction temperature	Permits use in sealed enclosures with ambient temperatures up to 70 °C when mounted per Fig. 1 derating curve

Applications

Air Conditioner Indoor Fan Control	Low-Power Motor Speed Regulation
Use Scenario: Variable-speed control of shaded-pole or PSC motors in residential air conditioner indoor units using phase-angle dimming. IC Role / Device Role / Timing Role: Main AC power switch triggered synchronously with zero-crossing detection to modulate RMS voltage delivered to motor windings. Use Value: Enables energy-efficient airflow adjustment with <10 mA gate drive compatibility - reducing BOM count versus buffered triac solutions.	Use Scenario: Speed control of small induction or universal motors in appliances such as humidifiers, exhaust fans, and blenders. IC Role / Device Role / Timing Role: Bidirectional AC switching element in phase-control topology, triggered in any quadrant to avoid dead-time insertion. Use Value: Eliminates need for dual SCR configuration or quadrant-selecting logic - simplifying driver design and PCB layout.
Compact Appliance Power Switching	Phase-Controlled Lighting Dimmers
Use Scenario: On/off and soft-start switching of heating elements or solenoids in coffee makers, rice cookers, and smart plugs. IC Role / Device Role / Timing Role: High-voltage AC switch activated by MCU via optocoupler-isolated gate drive, leveraging sensitive triggering for low-power isolation design. Use Value: Reduces optocoupler output stage complexity - allowing use of low-current-output devices like PC817 or VO615A without Darlington buffers.	Use Scenario: Leading-edge dimming of incandescent or halogen lamps in residential wall dimmers and smart lighting modules. IC Role / Device Role / Timing Role: Main triac conducting AC half-cycles after programmable delay from zero-crossing; gate triggered in Q1/Q3 for standard dimmer operation. Use Value: Maintains stable firing angle down to 5% brightness due to consistent ≤10 mA I_GT across temperature and quadrants.

Air Conditioner Indoor Fan Control

Low-Power Motor Speed Regulation

Use Scenario: Variable-speed control of shaded-pole or PSC motors in residential air conditioner indoor units using phase-angle dimming.

IC Role / Device Role / Timing Role: Main AC power switch triggered synchronously with zero-crossing detection to modulate RMS voltage delivered to motor windings.

Use Value: Enables energy-efficient airflow adjustment with <10 mA gate drive compatibility - reducing BOM count versus buffered triac solutions.

Use Scenario: Speed control of small induction or universal motors in appliances such as humidifiers, exhaust fans, and blenders.

IC Role / Device Role / Timing Role: Bidirectional AC switching element in phase-control topology, triggered in any quadrant to avoid dead-time insertion.

Use Value: Eliminates need for dual SCR configuration or quadrant-selecting logic - simplifying driver design and PCB layout.

Compact Appliance Power Switching

Phase-Controlled Lighting Dimmers

Use Scenario: On/off and soft-start switching of heating elements or solenoids in coffee makers, rice cookers, and smart plugs.

IC Role / Device Role / Timing Role: High-voltage AC switch activated by MCU via optocoupler-isolated gate drive, leveraging sensitive triggering for low-power isolation design.

Use Value: Reduces optocoupler output stage complexity - allowing use of low-current-output devices like PC817 or VO615A without Darlington buffers.

Use Scenario: Leading-edge dimming of incandescent or halogen lamps in residential wall dimmers and smart lighting modules.

IC Role / Device Role / Timing Role: Main triac conducting AC half-cycles after programmable delay from zero-crossing; gate triggered in Q1/Q3 for standard dimmer operation.

Use Value: Maintains stable firing angle down to 5% brightness due to consistent ≤10 mA I_GT across temperature and quadrants.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4Q triac applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STMicroelectronics BT131-600E	600 V V_DRM, identical pinout, same I_T(RMS)/I_GT specs	Limited to 230 VAC systems with lower surge margin; unsuitable for 277 VAC or high-line industrial use	Select only where mains voltage is strictly ≤240 VAC and transient immunity requirements are relaxed
ON Semiconductor 2N6071A	600 V V_DRM, TO-92, but 35 mA max I_GT; requires gate buffer for MCU drive	Not logic-compatible; adds transistor buffer, PCB area, and component count versus BT131-800E,412	Choose only if legacy design reuse mandates 2N6071A footprint and gate drive capability is available

Compared with BT131-600E and 2N6071A, the BT131-800E,412 provides higher blocking voltage headroom and true logic-level gate compatibility - delivering simpler, more robust, and globally deployable AC control without redesigning drive circuitry or compromising surge resilience.

Availability

BT131-800E,412 is available at Aetrix Electronics and suitable for air conditioner fan control, low-power motor regulation, and compact appliance switching requiring stable component supply, long-life reliability, and consistent four-quadrant triggering performance.

Supply support for BT131-800E,412 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

NXP Semiconductors is a Dutch semiconductor company specializing in secure connectivity solutions, automotive ICs, and power management components - with broad portfolio coverage across industrial, consumer, and communication markets.

The BT131-800E,412 belongs to NXP's "Series E" sensitive-gate triac family, engineered specifically for direct microcontroller interfacing in cost-sensitive, space-constrained AC control applications - prioritizing low gate drive, quadrant flexibility, and thermal ruggedness.

FAQ

What is the maximum RMS load current supported by the BT131-800E,412?

The BT131-800E,412 supports 1 A RMS on-state current under specified thermal conditions: full sine wave, lead temperature ≤51 °C, and proper PCB copper pour per Figure 1. Exceeding this limit risks thermal runaway due to its 60 K/W junction-to-lead thermal resistance. Derating is required above 51 °C lead temperature - e.g., ~0.7 A at 70 °C lead temp.

Can the BT131-800E,412 be triggered directly by a 3.3 V microcontroller GPIO?

Yes - the BT131-800E,412 has a maximum gate trigger current of 10 mA across all four quadrants at 25 °C, and typical values remain well within 3.3 V MCU drive capability. With appropriate series gate resistor (e.g., 220 Ω), it draws ~10–12 mA peak, staying within safe GPIO limits for most ARM Cortex-M or ESP32 outputs.

Does the BT131-800E,412 require a snubber circuit in standard fan control applications?

A snubber is not mandatory for resistive or lightly inductive loads like shaded-pole fan motors when operating below 50 Hz switching frequency and with dV/dt <50 V/µs. However, NXP recommends RC snubbers (e.g., 100 Ω + 100 nF) for highly inductive loads or environments with fast AC transients to ensure reliable commutation and prevent false turn-on.

What is the minimum holding current specification for the BT131-800E,412?

The BT131-800E,412 has a maximum holding current (I_H) of 10 mA at 25 °C, with typical value of 1.3 mA. This ensures reliable latching even with low-load currents - critical for maintaining conduction during low-speed motor operation or dimmed lighting states where current dips near zero-crossing.

Is the BT131-800E,412 compliant with RoHS and REACH regulations?

Yes - the BT131-800E,412 is manufactured by NXP Semiconductors in compliance with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Its TO-92 (SOT54) package uses lead-free terminations and halogen-free molding compound, as confirmed in NXP's official product change notices and material declarations.

BT131-800E,412 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Packaging:: Bulk

Product Status:: Active

Triac Type:: Logic - Sensitive Gate

Voltage - Off State:: 800 V

Current - On State (It (RMS)) (Max):: 1 A

Voltage - Gate Trigger (Vgt) (Max):: 1.5 V

Current - Non Rep. Surge 50, 60Hz (Itsm):: 12.5A, 13.7A

Current - Gate Trigger (Igt) (Max):: 10 mA

Current - Hold (Ih) (Max):: 10 mA

Configuration:: Single

Operating Temperature:: 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

BT131-800E,412 FAQ

1.How can I place an order for BT131-800E,412 through Aetrix?

Please submit a Request for Quotation (RFQ) for BT131-800E,412 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 BT131-800E,412 reliable?

The price and inventory of BT131-800E,412 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BT131-800E,412 is usually 5 days.

3.What payment methods are accepted for BT131-800E,412?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BT131-800E,412 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BT131-800E,412?

BT131-800E,412 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BT131-800E,412 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 BT131-800E,412?

For technical support, including BT131-800E,412 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BT131-800E,412 requirements.

6.How does Aetrix verify that BT131-800E,412 is sourced from the original manufacturer or authorized distributors?

All BT131-800E,412 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 BT131-800E,412 meets industry standards.

7.What is the process for return or replacement of BT131-800E,412?

All BT131-800E,412 units undergo pre-shipment inspection (PSI). If there is an issue with BT131-800E,412, 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 BT131-800E,412 part is unused and in its original packaging.

Return procedure for BT131-800E,412:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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