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Home > Products > Discrete Semiconductor Products > Thyristors > TRIACs

NXP Semiconductors ACT108-600D,126

Name: ACT108-600D,126
Brand: NXP Semiconductors
SKU: ACT108-600D,126
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ACT108-600D,126

Manufacturer:: NXP Semiconductors

Category:: TRIACs

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

Datasheet:: ACT108-600D,126.pdf

Description:: TRIAC SENS GATE 600V 0.8A TO92-3

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Product details

Overview

ACT108-600D from NXP Semiconductors is an AC thyristor power switch in SOT54 (TO-92) package, designed for low-to-medium power AC load control with self-protective transient suppression. It delivers 600 V repetitive peak off-state voltage, 0.8 A RMS on-state current, and features exclusive negative gate triggering, full-cycle AC conduction, and clamping at 650 V during 1 ms transients - ideal for fan and pump motor circuits.

For engineers reviewing the ACT108-600D datasheet, ACT108-600D pinout, ACT108-600D application, or ACT108-600D equivalent, this device serves as a robust, gate-isolated AC switching solution for inductive/resistive loads where noise immunity, low gate trigger current (0.5–5 mA), and built-in overvoltage protection are critical selection criteria.

Technical Context

The ACT108-600D operates as a bidirectional thyristor with remote gate architecture that electrically isolates the gate driver from load current effects. Its negative gate triggering enables reliable turn-on under noisy conditions, while its self-protective behavior includes safe clamping of low-energy transients and automatic turn-on during high-energy surges to prevent destructive voltage buildup.

It supports full-cycle AC conduction without commutation circuitry and maintains stable latching (≤25 mA) and holding (≤20 mA) currents across −50 °C to 125 °C. The device sustains dVD/dt up to 300 V/µs at 125 °C and withstands non-repetitive peak pulse voltage up to 2 kV per IEC 61000-4-5 test conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DRM	600 V - Maximum repetitive AC blocking voltage before conduction; ensures safe operation on 230 VAC mains with margin.
I_T(RMS)	0.8 A - Continuous RMS load current capability at T_lead ≤ 71 °C; suitable for sub-100 W resistive/inductive loads.
I_GT	0.5–5 mA - Gate trigger current range at 12 V drive; enables direct microcontroller GPIO driving without buffer.
V_CL	650 V - Clamping voltage at 100 µA, 1 ms pulse; limits transient energy dissipation and protects downstream components.
dV/dt	300 V/µs - Minimum off-state voltage rise rate immunity at 125 °C; prevents false triggering in noisy industrial environments.
V_T	1.3 V - On-state voltage at 1.1 A; determines conduction loss (≈1.4 W max at rated current) and thermal design requirements.
V_PP	2 kV - Non-repetitive peak pulse voltage rating; meets IEC 61000-4-5 Level 3 surge immunity requirements.

Pinout & Package

SOT54 (TO-92) plastic single-ended leaded through-hole package with 3 leads; compact 5.2 × 4.8 × 14.5 mm outline, optimized for PCB mounting with 4 mm lead length and R_th(j-a) = 150 K/W.

Pin/Terminal	Circuit Role	Design Meaning
1	CM (Common)	Reference terminal shared between gate and load paths; forms return path for gate drive and load current.
2	G (Gate)	Negative-trigger input; isolated from load current path to ensure noise-immune triggering independent of load polarity or phase.
3	LD (Load)	Main AC load connection; conducts bidirectional current when triggered; rated for 0.8 A RMS and 600 V blocking.

Key Features

Feature	Design Value
Exclusive negative gate triggering	Enables robust turn-on using standard logic-level signals without polarity-sensitive external circuitry or level-shifting.
Self-protective turn-on during high-energy transients	Automatically triggers conduction above ~650 V to shunt surge energy, eliminating need for external crowbar or TVS coordination.
Remote gate isolation	Physically separates gate drive node from load current path, preventing ground bounce and EMI coupling into control circuitry.
Very sensitive gate (I_GT ≤ 5 mA)	Permits direct drive from low-power MCUs or optocouplers without gate driver ICs, reducing BOM count and layout complexity.
Safe clamping of low-energy over-voltage transients	Maintains V_CL ≤ 650 V at 100 µA for 1 ms, limiting stress on connected components without sacrificing response time.

Applications

Fan Motor Control	Pump Motor Control
Use Scenario: Speed-controlled AC cooling fans in HVAC systems and appliance enclosures. IC Role / Device Role / Timing Role: AC power switch controlling full-wave mains voltage to induction motor windings. Use Value: Negative gate triggering ensures reliable start-up under variable load inertia and line voltage sags; self-clamping protects against back-EMF spikes during abrupt shutdown.	Use Scenario: Intermittent-duty water circulation pumps in residential appliances and small industrial equipment. IC Role / Device Role / Timing Role: Bidirectional AC switch enabling zero-crossing–free phase-angle or burst-fire control. Use Value: Full-cycle conduction avoids harmonic injection into shared AC lines; 0.8 A RMS rating matches typical 60–90 W pump loads without heatsinking.
Inductive Load Protection	Safety-Critical Resistive Load Switching
Use Scenario: Solenoid actuators and electromagnetic valves subject to frequent switching and inductive kickback. IC Role / Device Role / Timing Role: Transient-tolerant AC power switch absorbing stored magnetic energy via controlled conduction. Use Value: dVD/dt ≥ 300 V/µs and self-protective turn-on prevent false triggering and catastrophic failure during rapid load de-energization.	Use Scenario: Heating element control in medical devices and laboratory instruments requiring fail-safe thermal cutoff. IC Role / Device Role / Timing Role: Mains-isolated AC power switch with intrinsic overvoltage clamping for enhanced functional safety. Use Value: 650 V clamping voltage and 2 kV peak pulse rating provide margin beyond IEC 61000-4-5 surge requirements, supporting Class I/II safety certification.

Fan Motor Control

Pump Motor Control

Use Scenario: Speed-controlled AC cooling fans in HVAC systems and appliance enclosures.

IC Role / Device Role / Timing Role: AC power switch controlling full-wave mains voltage to induction motor windings.

Use Value: Negative gate triggering ensures reliable start-up under variable load inertia and line voltage sags; self-clamping protects against back-EMF spikes during abrupt shutdown.

Use Scenario: Intermittent-duty water circulation pumps in residential appliances and small industrial equipment.

IC Role / Device Role / Timing Role: Bidirectional AC switch enabling zero-crossing–free phase-angle or burst-fire control.

Use Value: Full-cycle conduction avoids harmonic injection into shared AC lines; 0.8 A RMS rating matches typical 60–90 W pump loads without heatsinking.

Inductive Load Protection

Safety-Critical Resistive Load Switching

Use Scenario: Solenoid actuators and electromagnetic valves subject to frequent switching and inductive kickback.

IC Role / Device Role / Timing Role: Transient-tolerant AC power switch absorbing stored magnetic energy via controlled conduction.

Use Value: dVD/dt ≥ 300 V/µs and self-protective turn-on prevent false triggering and catastrophic failure during rapid load de-energization.

Use Scenario: Heating element control in medical devices and laboratory instruments requiring fail-safe thermal cutoff.

IC Role / Device Role / Timing Role: Mains-isolated AC power switch with intrinsic overvoltage clamping for enhanced functional safety.

Use Value: 650 V clamping voltage and 2 kV peak pulse rating provide margin beyond IEC 61000-4-5 surge requirements, supporting Class I/II safety certification.

Equivalent & Alternatives

The following parts are listed as comparable options for similar AC thyristor switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BT134-600D	Same TO-92 package, 4 A I_T(RMS), higher I_GT (5–15 mA), no integrated clamping; requires external snubber.	Higher current capacity but lacks self-protective transient response; suited for fixed-load, low-surge environments.	Select BT134-600D only when load current exceeds 0.8 A and system-level surge protection is already implemented.
MAC97A6	TO-92 package, 0.8 A rating, but positive gate triggering only; V_DRM = 600 V, no specified V_CL or self-protective behavior.	No negative gate support or transient clamping; requires careful gate drive design and external protection for noisy loads.	Choose MAC97A6 only if existing gate driver is unidirectional and board space prohibits adding external clamping components.

Compared with BT134-600D and MAC97A6, the ACT108-600D uniquely integrates negative gate triggering, 650 V clamping, and automatic high-energy transient turn-on - reducing external component count and improving reliability in fan, pump, and safety-critical AC load applications without increasing PCB area.

Availability

ACT108-600D is available at Aetrix Electronics and suitable for fan motor circuits, pump motor circuits, and lower-power inductive/resistive load switching requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for ACT108-600D 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 secure connectivity solutions for automotive, industrial, and consumer markets.

The ACT108-600D belongs to NXP's AC thyristor power switch product line, engineered specifically for robust, self-protected AC load control in cost-sensitive, space-constrained applications such as white goods and building automation systems.

FAQ

What is the maximum RMS load current supported by the ACT108-600D?

The ACT108-600D supports a maximum RMS on-state current of 0.8 A under full sine wave conditions with lead temperature ≤ 71 °C. This rating assumes proper PCB copper area and ambient conditions per Figure 2 in the datasheet; exceeding this value risks thermal runaway and permanent junction damage.

Does the ACT108-600D require an external snubber circuit?

No, the ACT108-600D does not require an external snubber due to its integrated self-protective clamping function. At 650 V (ICL = 100 µA, tp = 1 ms), it safely limits transient overvoltage without external components - though a small RC snubber may still be used for EMI reduction in highly noisy environments.

Can the ACT108-600D be directly driven by a microcontroller GPIO pin?

Yes, the ACT108-600D can be directly driven by a standard 3.3 V or 5 V microcontroller GPIO pin because its gate trigger current is as low as 0.5 mA (typical) and gate trigger voltage is ≤ 0.9 V at 25 °C. A series current-limiting resistor (e.g., 1 kΩ) is recommended to limit peak gate current within 1 A absolute maximum.

What is the significance of negative gate triggering in the ACT108-600D?

Negative gate triggering in the ACT108-600D means the device turns on when a negative voltage is applied between gate (pin 2) and common (pin 1). This architecture provides superior noise immunity in AC environments and eliminates the need for polarity-reversal circuitry when interfacing with optocouplers or transformer-isolated drivers.

Is the ACT108-600D suitable for automotive applications?

No, the ACT108-600D is not automotive-qualified. Per NXP's legal disclaimers, it is not tested or warranted for automotive use, lacks AEC-Q101 qualification, and has no guaranteed operation beyond 125 °C junction temperature - making it appropriate only for industrial, consumer, and commercial equipment.

ACT108-600D,126 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:: 600 V

Current - On State (It (RMS)) (Max):: 800 mA

Voltage - Gate Trigger (Vgt) (Max):: 900 mV

Current - Non Rep. Surge 50, 60Hz (Itsm):: 8A, 8.8A

Current - Gate Trigger (Igt) (Max):: 5 mA

Current - Hold (Ih) (Max):: 20 mA

Configuration:: Single

Operating Temperature:: 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

ACT108-600D,126 FAQ

1.How can I place an order for ACT108-600D,126 through Aetrix?

Please submit a Request for Quotation (RFQ) for ACT108-600D,126 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 ACT108-600D,126 reliable?

The price and inventory of ACT108-600D,126 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ACT108-600D,126 is usually 5 days.

3.What payment methods are accepted for ACT108-600D,126?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ACT108-600D,126 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ACT108-600D,126?

ACT108-600D,126 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ACT108-600D,126 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 ACT108-600D,126?

For technical support, including ACT108-600D,126 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ACT108-600D,126 requirements.

6.How does Aetrix verify that ACT108-600D,126 is sourced from the original manufacturer or authorized distributors?

All ACT108-600D,126 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 ACT108-600D,126 meets industry standards.

7.What is the process for return or replacement of ACT108-600D,126?

All ACT108-600D,126 units undergo pre-shipment inspection (PSI). If there is an issue with ACT108-600D,126, 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 ACT108-600D,126 part is unused and in its original packaging.

Return procedure for ACT108-600D,126:

1.Submit a request within 90 days.

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

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