Q6008RH4TP TRIAC Alternistor 600V 8A Equivalent & Substitute Parts

Part Overview

The Q6008RH4TP is a Littelfuse TRIAC Alternistor rated for 600V off-state voltage and 8A on-state current in a Through Hole TO-220AB package. This snubberless design operates across -40°C to 125°C and is ROHS3 compliant with unlimited moisture sensitivity level. The part is currently active in production with 3170 units in stock. Equivalent and substitute parts are identified when component availability changes, supply chain constraints occur, or design flexibility is required while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Voltage - Off State	600 V
Current - On State (It (RMS)) (Max)	8 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V
Current - Gate Trigger (Igt) (Max)	35 mA
Current - Hold (Ih) (Max)	35 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	83A, 100A
Operating Temperature Range	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3
Triac Type	Alternistor - Snubberless
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the Q6008RH4TP is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - Off State: 600 V
Package / Case: TO-220-3 (Through Hole)
Configuration: Single
Mounting Type: Through Hole
RoHS Status: ROHS3 Compliant

Allowable Parameter Ranges for Substitution:

Current - On State (It (RMS)) (Max): 8 A or higher
Voltage - Gate Trigger (Vgt) (Max): 1.3 V or lower
Current - Gate Trigger (Igt) (Max): 35 mA or lower
Current - Hold (Ih) (Max): 35 mA or lower
Operating Temperature: Must include the -40°C to 125°C range or extend it
Triac Type: Alternistor - Snubberless preferred; Logic - Sensitive Gate acceptable with verification of gate drive requirements

Substitute parts are categorized as MFR Recommended (direct manufacturer recommendations) or Parametric Equivalent (meeting all electrical and mechanical criteria).

Parameter Comparison

Parameter	Q6008RH4TP (Littelfuse)	BT138-600E,127 (WeEn)	BTA10-600CWRG (STMicroelectronics)	T835H-6T (STMicroelectronics)	BTA08-600CWRG (STMicroelectronics)	BTB08-600CWRG (STMicroelectronics)
Voltage - Off State	600 V	600 V	600 V	600 V	600 V	600 V
Current - On State (It (RMS)) (Max)	8 A	12 A	10 A	8 A	8 A	8 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.5 V	1.3 V	1 V	1.3 V	1.3 V
Current - Gate Trigger (Igt) (Max)	35 mA	10 mA	35 mA	35 mA	35 mA	35 mA
Current - Hold (Ih) (Max)	35 mA	30 mA	35 mA	35 mA	35 mA	35 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	83A, 100A	95A, 105A	100A, 105A	80A, 84A	80A, 84A	80A, 84A
Operating Temperature Range	-40°C ~ 125°C	125°C (TJ)	-40°C ~ 125°C	-40°C ~ 150°C	-40°C ~ 125°C	-40°C ~ 125°C
Triac Type	Alternistor - Snubberless	Logic - Sensitive Gate	Alternistor - Snubberless	Alternistor - Snubberless	Alternistor - Snubberless	Alternistor - Snubberless
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MFR Recommended Substitutes:

BT138-600E,127 (WeEn Semiconductors) is designated as MFR recommended with 1088 units in stock. This part features a Logic - Sensitive Gate design with 12A on-state current rating and reduced gate trigger current of 10 mA. The gate trigger voltage maximum of 1.5 V is slightly higher than the Q6008RH4TP. This part is ROHS3 compliant and active in production. Gate drive circuit compatibility must be evaluated due to the different Triac type classification.

BTA10-600CWRG (STMicroelectronics) is designated as MFR recommended with 1840 units in stock. This Alternistor - Snubberless part matches the triac type of the Q6008RH4TP with 10A on-state current, identical gate trigger voltage of 1.3 V, and full operating temperature range of -40°C to 125°C. All electrical parameters remain within acceptable substitution limits. ROHS3 compliant and active in production.

T835H-6T (STMicroelectronics) is designated as MFR recommended with 1654 units in stock. This Alternistor - Snubberless part matches the 8A on-state current of the Q6008RH4TP with improved gate trigger voltage of 1 V. Operating temperature extends to 150°C, exceeding the Q6008RH4TP range. All electrical parameters are within acceptable limits. ROHS3 compliant and active in production.

Parametric Equivalent Substitutes:

BTA08-600CWRG (STMicroelectronics) is designated as parametric equivalent with 16750 units in stock. This Alternistor - Snubberless part provides identical on-state current of 8A and gate trigger voltage of 1.3 V. All electrical parameters match or exceed the Q6008RH4TP specifications. Operating temperature range is -40°C to 125°C. ROHS3 compliant and active in production with highest inventory availability.

BTB08-600CWRG (STMicroelectronics) is designated as parametric equivalent with 1488 units in stock. This Alternistor - Snubberless part provides identical on-state current of 8A and gate trigger voltage of 1.3 V. All electrical parameters match or exceed the Q6008RH4TP specifications. Operating temperature range is -40°C to 125°C. ROHS3 compliant and active in production.

Frequently Asked Questions (FAQ)

Q: Can BT138-600E,127 be used as a direct replacement for Q6008RH4TP?

A: BT138-600E,127 meets the mandatory package, voltage, and compliance requirements. However, it is classified as Logic - Sensitive Gate rather than Alternistor - Snubberless. The gate trigger current is significantly lower at 10 mA versus 35 mA. Gate drive circuit compatibility must be evaluated before substitution.

Q: What is the difference between Alternistor - Snubberless and Logic - Sensitive Gate triac types?

A: Both are TRIAC devices rated for 600V. Alternistor - Snubberless types are optimized for snubberless operation with standard gate drive requirements. Logic - Sensitive Gate types feature reduced gate trigger current requirements, suitable for logic-level gate drive circuits. The choice depends on the gate drive circuit design in the application.

Q: Are all substitute parts pin-compatible with Q6008RH4TP?

A: All substitute parts use the TO-220-3 package with identical pin configuration. Physical mounting and PCB layout compatibility is maintained across all listed substitutes.

Q: Which substitute part has the highest current rating?

A: BT138-600E,127 has the highest on-state current rating at 12A, followed by BTA10-600CWRG at 10A. The remaining substitutes match the Q6008RH4TP at 8A.

Q: Can I use T835H-6T in applications requiring operation above 125°C?

A: T835H-6T is rated to 150°C junction temperature, extending the upper operating limit by 25°C. This part is suitable for higher temperature applications within its specified range.

Q: Which substitute offers the best inventory availability?

A: BTA08-600CWRG offers the highest inventory with 16750 units in stock, providing supply chain flexibility for high-volume applications.

Q: Are all substitutes REACH compliant?

A: All listed substitute parts have REACH Unaffected status, matching the Q6008RH4TP compliance profile.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message