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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

NXP Semiconductors BT138-600G,127

Name: BT138-600G,127
Brand: NXP Semiconductors
SKU: BT138-600G,127
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BT138-600G,127

Manufacturer:: NXP Semiconductors

Category:: TRIACs

Package:: TO-220-3

Datasheet:: BT138-600G,127.pdf

Description:: TRIAC 600V 12A TO220AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BT138-600G,127 from NXP Semiconductors is a planar passivated 4-quadrant triac in TO-220AB (SOT78) package, rated for 600 V repetitive peak off-state voltage, 12 A RMS on-state current, and 95 A non-repetitive peak on-state current at 20 ms. It operates up to 125 °C junction temperature and is designed for bidirectional AC switching in motor control, lighting, heating, and static switching circuits.

For engineers reviewing the BT138-600G,127 datasheet, BT138-600G,127 pinout, BT138-600G,127 application, or BT138-600G,127 equivalent, key selection criteria include gate trigger current across all four quadrants (5–100 mA), dVD/dt immunity (250 V/µs), thermal resistance to mounting base (1.5 K/W), on-state voltage (1.65 V max at 15 A), and latching/holding current behavior under temperature variation.

Technical Context

The BT138-600G,127 uses planar passivation for enhanced voltage ruggedness and reliability in high-transient environments. Its four-quadrant triggering enables gate control regardless of main terminal polarity combinations - T2+/G+, T2+/G−, T2−/G−, and T2−/G+ - with quadrant-specific IGT ranging from 5 mA (T2+/G+) to 22 mA (T2−/G+).

It features a low thermal resistance from junction to mounting base (1.5 K/W full cycle), enabling efficient heat transfer when heatsink-mounted. The device supports high dVD/dt (250 V/µs) and dIT/dt (10 A/µs in T2−/G+), making it suitable for noisy industrial AC line environments without false triggering.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DRM	600 V - maximum repetitive peak off-state voltage; ensures reliable blocking during AC half-cycles up to 230 V RMS mains with safety margin
I_T(RMS)	12 A - continuous RMS on-state current at T_mb ≤ 99 °C; defines steady-state power handling with standard heatsinking
I_TSM	95 A - non-repetitive peak on-state current for 20 ms; supports motor startup surges and lamp inrush currents
I_GT	5–100 mA - gate trigger current range across four quadrants; lowest value (5 mA) in T2+/G+ enables noise-immune triggering
dV/dt	250 V/µs - minimum rate of rise of off-state voltage; prevents spurious turn-on in high dv/dt transients (e.g., inductive load switching)
R_th(j-mb)	1.5 K/W - thermal resistance junction-to-mounting base (full cycle); determines required heatsink size for thermal management
V_T	1.65 V - maximum on-state voltage at 15 A and 25 °C; directly impacts conduction loss and thermal design

Pinout & Package

Package: TO-220AB (SOT78), plastic single-ended package with heatsink mounting base; 3 leads; 1 mounting hole; lead material: tin-plated copper.

Pin/Terminal	Circuit Role	Design Meaning
1	T1	Main terminal 1 - one AC current path; connected to load or line depending on circuit topology
2	T2	Main terminal 2 - second AC current path; also serves as mounting base (electrically connected)
3	G	Gate - control input for bidirectional conduction initiation; requires quadrant-specific trigger current

Key Features

Feature	Design Value
Four-quadrant triggering	Enables gate control with any polarity combination of T1/T2 and gate, eliminating need for external polarity conditioning circuitry
Planar passivation	Provides stable voltage blocking and long-term reliability under thermal cycling and humidity stress
Lowest I_GT in QI (T2+/G+)	5 mA typical gate trigger current improves noise immunity and reduces driver circuit power requirements
High dV/dt immunity	250 V/µs rating prevents false turn-on in electrically noisy industrial environments with fast-switching loads
Mounting base as T2	Electrically active heatsink interface simplifies mechanical layout but requires isolation when T2 is not referenced to chassis ground

Applications

AC Motor Speed Control	Dimmable LED/Halogen Lighting
Use Scenario: Phase-angle controlled speed regulation of universal or shaded-pole AC motors in fans, pumps, and appliances. IC Role / Device Role / Timing Role: Bidirectional AC switch controlling conduction angle per half-cycle to adjust average motor power. Use Value: Enables smooth, low-noise speed control without complex PWM drivers; leverages inherent zero-crossing commutation for EMI reduction.	Use Scenario: Leading-edge dimming of mains-powered LED drivers and halogen lamps in residential/commercial lighting. IC Role / Device Role / Timing Role: Main AC switching element triggered by phase-cut dimmer signals to regulate RMS voltage delivered to load. Use Value: Supports high-voltage AC dimming with minimal external components; 600 V V_DRM accommodates 230 V mains with surge margin.
Industrial Heating Control	Static AC Power Switching
Use Scenario: On/off or phase-controlled power delivery to resistive heating elements in ovens, dryers, and process equipment. IC Role / Device Role / Timing Role: High-current AC switch replacing electromechanical contactors for silent, wear-free operation. Use Value: 12 A RMS rating and 95 A surge capability handle thermal mass heating cycles; planar passivation ensures longevity under repeated thermal stress.	Use Scenario: Solid-state replacement of relays in HVAC, power distribution, and test equipment requiring fast, bounce-free AC switching. IC Role / Device Role / Timing Role: Bidirectional AC switch activated by logic-level gate signal to isolate or connect AC loads. Use Value: Eliminates contact arcing and mechanical wear; 250 V/µs dV/dt immunity prevents false triggering during load transients.

AC Motor Speed Control

Dimmable LED/Halogen Lighting

Use Scenario: Phase-angle controlled speed regulation of universal or shaded-pole AC motors in fans, pumps, and appliances.

IC Role / Device Role / Timing Role: Bidirectional AC switch controlling conduction angle per half-cycle to adjust average motor power.

Use Value: Enables smooth, low-noise speed control without complex PWM drivers; leverages inherent zero-crossing commutation for EMI reduction.

Use Scenario: Leading-edge dimming of mains-powered LED drivers and halogen lamps in residential/commercial lighting.

IC Role / Device Role / Timing Role: Main AC switching element triggered by phase-cut dimmer signals to regulate RMS voltage delivered to load.

Use Value: Supports high-voltage AC dimming with minimal external components; 600 V V_DRM accommodates 230 V mains with surge margin.

Industrial Heating Control

Static AC Power Switching

Use Scenario: On/off or phase-controlled power delivery to resistive heating elements in ovens, dryers, and process equipment.

IC Role / Device Role / Timing Role: High-current AC switch replacing electromechanical contactors for silent, wear-free operation.

Use Value: 12 A RMS rating and 95 A surge capability handle thermal mass heating cycles; planar passivation ensures longevity under repeated thermal stress.

Use Scenario: Solid-state replacement of relays in HVAC, power distribution, and test equipment requiring fast, bounce-free AC switching.

IC Role / Device Role / Timing Role: Bidirectional AC switch activated by logic-level gate signal to isolate or connect AC loads.

Use Value: Eliminates contact arcing and mechanical wear; 250 V/µs dV/dt immunity prevents false triggering during load transients.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STMicroelectronics BT138-600E	Same V_DRM (600 V), lower I_T(RMS) (8 A), higher I_GT in QIV (T2−/G+) - 50 mA max vs. 100 mA for BT138-600G,127	Less suitable for high-current heating or motor loads requiring >10 A RMS; better for low-power lighting where gate drive margin is critical	Select BT138-600E only if gate drive circuit provides ≥50 mA and load current stays ≤8 A RMS
ON Semiconductor 2N6071A	Lower V_DRM (400 V), same I_T(RMS) (12 A), higher I_GT across all quadrants (up to 150 mA), TO-220AB package	Not suitable for 230 V mains with surge margin; acceptable only in 120 V regions or isolated low-voltage AC systems	Choose 2N6071A only in 120 V AC applications with verified transient protection; verify dV/dt rating (100 V/µs) against system noise

Compared with BT138-600E and 2N6071A, the BT138-600G,127 delivers superior 600 V blocking margin and balanced quadrant sensitivity - especially its 5 mA I_GT in QI - enabling robust operation in global 230 V markets with minimal gate drive overhead.

Availability

BT138-600G,127 is available at Aetrix Electronics and suitable for motor control, lighting dimming, industrial heating, and static AC switching applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for BT138-600G,127 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 global semiconductor company headquartered in Eindhoven, Netherlands, specializing in high-performance analog, logic, and power devices for industrial, automotive, and consumer applications.

The BT138-600G,127 belongs to NXP's general-purpose power triac product line, engineered for reliability in mains-connected AC control systems where voltage ruggedness, thermal stability, and four-quadrant flexibility are essential.

FAQ

What is the maximum junction temperature specification for BT138-600G,127?

The BT138-600G,127 has a maximum junction temperature (T_j) of 125 °C, as defined in its limiting values table. This rating must be maintained via proper heatsinking - with R_th(j-mb) = 1.5 K/W - to ensure long-term reliability under continuous 12 A RMS operation. Exceeding 125 °C risks permanent degradation of the planar passivation layer and increased leakage current.

Does BT138-600G,127 support triggering in all four quadrants?

Yes, the BT138-600G,127 is explicitly specified as a 4Q triac and supports gate-triggered conduction in all four quadrants: T2+/G+, T2+/G−, T2−/G−, and T2−/G+. Gate trigger current (I_GT) varies by quadrant - from 5 mA (T2+/G+) to 22 mA (T2−/G+) - and must be verified per application circuit polarity configuration.

What is the thermal resistance from junction to mounting base for BT138-600G,127?

The BT138-600G,127 has a thermal resistance from junction to mounting base (R_th(j-mb)) of 1.5 K/W for full-cycle operation, as stated in Table 5. This value assumes proper mechanical mounting with thermal interface material and defines the baseline for calculating heatsink requirements when operating at 12 A RMS with T_mb ≤ 99 °C.

Can BT138-600G,127 replace BT138-600D in existing designs?

The BT138-600G,127 and BT138-600D share identical TO-220AB packaging and core ratings (600 V V_DRM, 12 A I_T(RMS)), but differ in gate sensitivity: BT138-600G,127 specifies lower I_GT in QI (5 mA typ) versus BT138-600D (10 mA typ). Replacement is generally safe, but verify gate drive strength and noise environment to avoid unintended triggering.

What is the on-state voltage of BT138-600G,127 at rated current?

The BT138-600G,127 exhibits a maximum on-state voltage (V_T) of 1.65 V at 15 A and 25 °C, per Table 6. At its rated 12 A RMS, V_T typically falls between 1.4 V and 1.6 V, directly influencing conduction losses (P_cond ≈ I_RMS × V_T) and thermal design margins.

BT138-600G,127 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

Package/Case:: TO-220-3

Packaging:: Bulk

Product Status:: Active

Triac Type:: Standard

Voltage - Off State:: 600 V

Current - On State (It (RMS)) (Max):: 12 A

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

Current - Non Rep. Surge 50, 60Hz (Itsm):: 95A, 105A

Current - Gate Trigger (Igt) (Max):: 50 mA

Current - Hold (Ih) (Max):: 60 mA

Configuration:: Single

Operating Temperature:: 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AB

BT138-600G,127 FAQ

1.How can I place an order for BT138-600G,127 through Aetrix?

Please submit a Request for Quotation (RFQ) for BT138-600G,127 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 BT138-600G,127 reliable?

The price and inventory of BT138-600G,127 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BT138-600G,127 is usually 5 days.

3.What payment methods are accepted for BT138-600G,127?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BT138-600G,127 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BT138-600G,127?

BT138-600G,127 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BT138-600G,127 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 BT138-600G,127?

For technical support, including BT138-600G,127 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BT138-600G,127 requirements.

6.How does Aetrix verify that BT138-600G,127 is sourced from the original manufacturer or authorized distributors?

All BT138-600G,127 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 BT138-600G,127 meets industry standards.

7.What is the process for return or replacement of BT138-600G,127?

All BT138-600G,127 units undergo pre-shipment inspection (PSI). If there is an issue with BT138-600G,127, 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 BT138-600G,127 part is unused and in its original packaging.

Return procedure for BT138-600G,127:

1.Submit a request within 90 days.

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

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