Q6004V3 TRIAC Equivalent & Substitute Parts

Part Overview

The Q6004V3 is a logic-sensitive gate TRIAC rated for 600V off-state voltage and 4A on-state current in a TO-251 through-hole package, manufactured by Littelfuse Inc. This component is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The part is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Key Parameters

Parameter	Value
Triac Type	Logic - Sensitive Gate
Voltage - Off State	600 V
Current - On State (It (RMS)) (Max)	4 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V
Current - Gate Trigger (Igt) (Max)	10 mA
Current - Hold (Ih) (Max)	20 mA
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the Q6004V3 is determined by the following critical parameters:

Triac Type: Logic - Sensitive Gate configuration
Voltage - Off State: 600 V minimum
Current - On State: 4 A minimum rating
Gate Trigger Voltage (Vgt): Maximum 1.3 V
Gate Trigger Current (Igt): Maximum 10 mA
Current - Hold (Ih): Maximum 20 mA
Mounting Type: Through Hole
Package compatibility: TO-251 or equivalent footprint

Two substitute parts meet these criteria with variations in non-critical parameters such as surge current ratings and hold current specifications.

Parameter Comparison

Parameter	Q6004V3 (Littelfuse)	BT134-600E,127 (WeEn)	T410-600H (STMicroelectronics)
Triac Type	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate
Voltage - Off State	600 V	600 V	600 V
Current - On State (It (RMS)) (Max)	4 A	4 A	4 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.5 V	1.3 V
Current - Gate Trigger (Igt) (Max)	10 mA	10 mA	10 mA
Current - Hold (Ih) (Max)	20 mA	15 mA	15 mA
Operating Temperature	-40°C ~ 125°C	125°C	-40°C ~ 125°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-251-3	SOT-82	TO-251-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

T410-600H (STMicroelectronics) is the primary substitute for direct replacement. It maintains identical gate trigger voltage (1.3 V maximum), matching operating temperature range (-40°C ~ 125°C), and identical TO-251 package configuration. Product status is Active with full ROHS3 compliance and REACH unaffected designation.

BT134-600E,127 (WeEn Semiconductors) is a functional equivalent with the following considerations: Gate trigger voltage is 1.5 V maximum (0.2 V higher than the original), operating temperature maximum is 125°C without lower temperature specification, and package is SOT-82 (different footprint from TO-251). Product status is Active with ROHS3 compliance and REACH affected designation. This substitute requires PCB layout modification due to package difference.

Frequently Asked Questions (FAQ)

Q: Can T410-600H replace Q6004V3 without circuit modification? A: Yes. T410-600H shares identical voltage ratings, current ratings, gate trigger voltage, and TO-251 package configuration. No circuit modification is required.

Q: What is the key difference between BT134-600E,127 and the original Q6004V3? A: BT134-600E,127 has a higher gate trigger voltage (1.5 V vs. 1.3 V), lacks lower temperature specification, and uses SOT-82 package instead of TO-251. PCB layout modification is necessary.

Q: Are all three parts ROHS3 compliant? A: Yes. Q6004V3, BT134-600E,127, and T410-600H are all ROHS3 compliant.

Q: Why is the Q6004V3 discontinued? A: Product discontinuation at DiGi Electronics indicates end-of-life status. Active substitutes are available from alternative manufacturers.

Q: Does operating temperature range affect substitution? A: For applications requiring operation below 0°C, T410-600H is required. BT134-600E,127 specifies only 125°C maximum without lower temperature rating.

Q: What is the impact of different surge current ratings? A: Surge current ratings (Itsm) vary between parts but do not affect substitution eligibility. These represent non-repetitive surge capability and are application-dependent.

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