Q8010R4 TRIAC 800V 10A TO-220 Equivalent & Substitute Parts

Part Overview

The Q8010R4 is a standard TRIAC manufactured by Littelfuse, rated for 800V off-state voltage and 10A on-state current in a TO-220-3 through-hole package. This component is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement. The part operates across the industrial temperature range of -40°C to 125°C and is RoHS3 compliant.

Key Parameters

Parameter	Q8010R4 Specification
Voltage - Off State	800 V
Current - On State (It RMS Max)	10 A
Voltage - Gate Trigger (Vgt Max)	1.3 V
Current - Gate Trigger (Igt Max)	25 mA
Current - Hold (Ih Max)	35 mA
Current - Non Rep. Surge (Itsm)	100A, 120A
Operating Temperature Range	-40°C to 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3
Triac Type	Standard

Substitute Part Grouping Explanation

Substitution for the Q8010R4 is determined by the following critical parameters:

Voltage Rating: All substitutes must maintain 800V off-state voltage to ensure circuit protection and reliability
Current Rating: Substitutes rated at 10A or higher are acceptable; higher ratings provide design margin
Gate Trigger Characteristics: Vgt and Igt parameters must be compatible with existing gate drive circuitry
Package and Mounting: TO-220-3 through-hole configuration is required for mechanical and thermal compatibility
Triac Type: Standard TRIACs are directly interchangeable; Logic-Sensitive Gate and Alternistor variants have different gate characteristics and are listed separately
Temperature Range: Operating temperature must support -40°C to 125°C minimum

Substitute parts are grouped into three categories based on current rating and triac type: Standard TRIACs at 12A and 16A ratings, Logic-Sensitive Gate variants, and Alternistor-Snubberless types.

Parameter Comparison

Part Number	Manufacturer	Voltage (V)	Current (A)	Vgt Max (V)	Igt Max (mA)	Ih Max (mA)	Triac Type	Temp Range (°C)	Status
Q8010R4	Littelfuse	800	10	1.3	25	35	Standard	-40 to 125	Discontinued
BTB12-800BW3G	onsemi	800	12	1.1	50	50	Standard	-40 to 125	Active
BTB12-800CW3G	onsemi	800	12	1.1	35	45	Standard	-40 to 125	Active
ACST610-8T	STMicroelectronics	800	6	1.0	10	25	Logic - Sensitive Gate	-40 to 125	Active
ACTT12-800CTNQ	WeEn Semiconductors	800	12	1.0	35	30	Standard	-40 to 150	Active
ACTT16-800CTNQ	WeEn Semiconductors	800	16	1.0	35	30	Standard	-40 to 150	Active
BT138-800E,127	WeEn Semiconductors	800	12	1.5	10	30	Logic - Sensitive Gate	-40 to 125	Active
BTA12-800CWRG	STMicroelectronics	800	12	1.3	35	35	Alternistor - Snubberless	-40 to 125	Active
BTA316-800C,127	WeEn Semiconductors	800	16	1.5	35	50	Standard	-40 to 125	Active
BTA316-800C/DGQ	WeEn Semiconductors	800	16	1.5	35	50	Standard	-40 to 125	Active
BTA316-800C/L05Q	WeEn Semiconductors	800	16	1.0	35	35	Standard	-40 to 125	Active

Engineering Selection Recommendations

Primary Substitutes (Standard TRIAC, 12A Rating)

BTB12-800BW3G and BTB12-800CW3G from onsemi are direct functional replacements. Both maintain 800V rating, exceed the 10A current requirement at 12A, and operate across the full -40°C to 125°C temperature range. Gate trigger voltage is lower (1.1V vs. 1.3V), which may reduce gate drive power requirements. Both parts are active and in stock.

Alternative Substitutes (Standard TRIAC, 16A Rating)

ACTT16-800CTNQ, BTA316-800C,127, BTA316-800C/DGQ, and BTA316-800C/L05Q provide higher current capacity at 16A. ACTT16-800CTNQ and BTA316-800C/L05Q feature lower gate trigger voltage (1.0V), improving gate drive efficiency. All maintain 800V rating and -40°C to 125°C operation. These are suitable where additional current margin is required.

Logic-Sensitive Gate Variants

ACST610-8T and BT138-800E,127 are Logic-Sensitive Gate TRIACs with reduced gate trigger current (10mA vs. 25mA). ACST610-8T is rated at 6A and is suitable only for applications where 10A current is not required. BT138-800E,127 is rated at 12A and features lower gate trigger current, making it appropriate for low-power gate drive circuits.

Alternistor-Snubberless Variant

BTA12-800CWRG is an Alternistor-Snubberless TRIAC rated at 12A with gate characteristics matching the original part (Vgt 1.3V, Igt 35mA). This variant is designed for applications requiring reduced EMI and snubber circuit complexity.

All recommended substitutes are RoHS3 compliant and carry ECCN EAR99 classification matching the original part.

Frequently Asked Questions (FAQ)

Q: Can I use a 12A or 16A rated TRIAC as a direct replacement for the 10A Q8010R4?

A: Yes. Higher current ratings are acceptable substitutes provided all other parameters—voltage, gate characteristics, temperature range, and package—are compatible. The circuit will operate safely with the higher current capacity.

Q: What is the difference between Standard, Logic-Sensitive Gate, and Alternistor TRIAC types?

A: Standard TRIACs have conventional gate trigger characteristics. Logic-Sensitive Gate variants require lower gate trigger current (10mA vs. 25-35mA), making them suitable for microcontroller-based gate drive circuits. Alternistor-Snubberless types are optimized for reduced EMI and may eliminate the need for external snubber networks.

Q: Are all substitute parts available in the same TO-220-3 package?

A: Yes. All listed substitutes use TO-220-3 through-hole packaging. Some variants specify TO-220AB or TO-220 Non-Isolated Tab, which are mechanically and thermally equivalent for this application.

Q: Does gate trigger voltage affect circuit compatibility?

A: Gate trigger voltage (Vgt) affects the gate drive circuit design. Lower Vgt values (1.0V vs. 1.3V) reduce gate drive power requirements. Higher Vgt values (1.5V) may require increased gate drive voltage. Verify that your gate drive circuit can supply the required voltage and current for the selected substitute.

Q: What is the significance of operating temperature range differences?

A: The Q8010R4 operates to 125°C. ACTT12-800CTNQ and ACTT16-800CTNQ extend to 150°C, providing additional thermal margin in high-temperature applications. For standard -40°C to 125°C operation, all substitutes are equivalent.

Q: Can I substitute a Logic-Sensitive Gate TRIAC if my circuit uses standard gate drive?

A: Logic-Sensitive Gate TRIACs require lower gate trigger current. If your circuit supplies 25-35mA gate current, a Logic-Sensitive Gate part will trigger reliably but may draw less power than designed. Verify gate drive circuit compatibility before substitution.

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