QJ6008DH4TP TRIAC Alternistor 600V 8A Equivalent & Substitute Parts

Part Overview

The QJ6008DH4TP is a snubberless TRIAC Alternistor manufactured by Littelfuse Inc., rated for 600V off-state voltage and 8A on-state current in a surface mount TO-252 (DPAK) package. This component is designed for AC switching applications requiring gate-controlled bidirectional thyristor functionality. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts become necessary when addressing supply chain constraints, packaging format requirements, or inventory availability while maintaining equivalent electrical and mechanical performance within specified operating parameters.

Key Parameters

Parameter	Value	Unit
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
Operating Temperature Range	-40 to 150	°C (TJ)
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	—
Mounting Type	Surface Mount	—
Configuration	Single	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the QJ6008DH4TP is determined by strict equivalence across the following critical parameters:

Voltage Rating: Off-state voltage must equal 600V
Current Rating: On-state RMS current must equal 8A maximum
Gate Trigger Characteristics: Vgt (Max) 1.3V and Igt (Max) 35mA
Hold Current: Ih (Max) 35mA
Package Type: TO-252-3 DPAK surface mount configuration
Triac Type: Snubberless Alternistor topology
Compliance: RoHS3 compliant, MSL 1 rating

The STMicroelectronics T835-600B and T835-600B-TR meet all substitution criteria. Both variants maintain identical electrical specifications and package configuration. The primary distinction is packaging format: T835-600B is supplied in Tube packaging, while T835-600B-TR is supplied in Cut Tape (CT) and Digi-Reel® format.

Parameter Comparison

Parameter	QJ6008DH4TP (Littelfuse)	T835-600B (STMicroelectronics)	T835-600B-TR (STMicroelectronics)
Voltage - Off State	600V	600V	600V
Current - On State (It (RMS)) (Max)	8A	8A	8A
Voltage - Gate Trigger (Vgt) (Max)	1.3V	1.3V	1.3V
Current - Gate Trigger (Igt) (Max)	35mA	35mA	35mA
Current - Hold (Ih) (Max)	35mA	35mA	35mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	70A, 84A	80A, 84A	80A, 84A
Operating Temperature Range	-40 to 150°C (TJ)	-40 to 125°C (TJ)	-40 to 125°C (TJ)
Package / Case	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Configuration	Single	Single	Single
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99	EAR99
HTSUS	8541.30.0080	8541.30.0080	8541.30.0080

Engineering Selection Recommendations

Both T835-600B and T835-600B-TR are qualified substitutes for the QJ6008DH4TP based on electrical equivalence and compliance alignment. Selection between these options depends on procurement and assembly requirements:

T835-600B (Tube Packaging): Suitable for applications where component handling and storage follow tube-based logistics. Inventory availability is 1,280 pieces.

T835-600B-TR (Cut Tape & Digi-Reel® Packaging): Optimized for automated pick-and-place assembly processes. Significantly higher inventory availability at 20,200 pieces supports high-volume production schedules.

All three parts maintain Active product status, full RoHS3 compliance, and REACH unaffected designation. The STMicroelectronics variants operate within a reduced maximum junction temperature range (-40 to 125°C versus -40 to 150°C), which is acceptable for applications not requiring the extended upper temperature limit of the Littelfuse part.

Frequently Asked Questions (FAQ)

Q: Can T835-600B and T835-600B-TR be used interchangeably with QJ6008DH4TP?

A: Yes. Both STMicroelectronics parts meet all electrical and mechanical substitution criteria. The difference is packaging format only: Tube versus Cut Tape/Digi-Reel. PCB footprint and electrical performance are identical.

Q: What is the difference between T835-600B and T835-600B-TR?

A: Both parts are electrically identical. T835-600B is supplied in Tube packaging for manual or semi-automated assembly. T835-600B-TR is supplied in Cut Tape and Digi-Reel format for fully automated pick-and-place assembly lines.

Q: Does the reduced operating temperature range of the STMicroelectronics parts affect compatibility?

A: The STMicroelectronics variants operate to 125°C maximum junction temperature, compared to 150°C for the Littelfuse QJ6008DH4TP. This is acceptable for applications with maximum junction temperatures at or below 125°C. Applications requiring operation above 125°C must use the QJ6008DH4TP.

Q: Are all three parts RoHS3 compliant?

A: Yes. QJ6008DH4TP, T835-600B, and T835-600B-TR are all RoHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating.

Q: What are the non-repetitive surge current differences?

A: QJ6008DH4TP is rated 70A/84A (50Hz/60Hz). T835-600B and T835-600B-TR are rated 80A/84A (50Hz/60Hz). Both exceed the primary current rating of 8A and are suitable for transient surge protection in equivalent applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message