Q4004R3TP TRIAC Equivalent & Substitute Parts

Part Overview

The Q4004R3TP is a standard TRIAC manufactured by Littelfuse Inc., rated for 400V off-state voltage and 4A on-state current in a TO-220AB through-hole package. This component is currently in active product status with 1086 units in stock. Finding equivalent and substitute parts becomes necessary when addressing supply chain requirements, design flexibility, or application-specific performance needs within the allowed electrical and mechanical parameter ranges.

Key Parameters

Parameter	Value
Voltage - Off State	400 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 Range	-40°C to 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the Q4004R3TP is determined by the following critical parameters:

Voltage Rating (Off State): Must be 400V or higher to maintain voltage margin
Current Rating (On State): Must be equal to or greater than 4A to support the application load
Gate Trigger Parameters: Vgt and Igt must be compatible with existing gate drive circuitry
Hold Current (Ih): Must not exceed circuit requirements
Package Type: TO-220-3 through-hole configuration for mechanical compatibility
Temperature Range: Must support -40°C to 125°C operating conditions
Compliance: RoHS3 compliance required for regulatory alignment

The BTA06-400CRG from STMicroelectronics meets these substitution criteria with a higher current rating (6A vs 4A), maintaining voltage compatibility and thermal operating range.

Parameter Comparison

Parameter	Q4004R3TP (Littelfuse)	BTA06-400CRG (STMicroelectronics)
Voltage - Off State	400 V	400 V
Current - On State (It (RMS)) (Max)	4 A	6 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.3 V
Current - Gate Trigger (Igt) (Max)	10 mA	25 mA
Current - Hold (Ih) (Max)	20 mA	25 mA
Current - Non Rep. Surge 50Hz	46 A	60 A
Current - Non Rep. Surge 60Hz	55 A	63 A
Operating Temperature Range	-40°C to 125°C (TJ)	-40°C to 125°C (TJ)
Package / Case	TO-220-3	TO-220-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The BTA06-400CRG is a valid substitute for the Q4004R3TP based on the following engineering criteria:

Voltage Compatibility: Both parts are rated at 400V off-state voltage, ensuring equivalent voltage margin in the application
Current Capability: The BTA06-400CRG provides 6A on-state current, exceeding the 4A requirement of the Q4004R3TP, offering design margin
Gate Drive Compatibility: Gate trigger voltage (Vgt) is identical at 1.3V maximum, ensuring compatibility with existing gate drive circuits
Thermal Performance: Both parts operate across the identical temperature range of -40°C to 125°C
Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status
Package Compatibility: Both use TO-220-3 through-hole packaging for direct mechanical substitution

The BTA06-400CRG is currently in obsolete product status, whereas the Q4004R3TP maintains active status. Selection should account for long-term availability requirements.

Frequently Asked Questions (FAQ)

Q: Can the BTA06-400CRG directly replace the Q4004R3TP in my circuit?

A: Yes, the BTA06-400CRG meets all critical substitution parameters. The identical 400V voltage rating, matching gate trigger voltage (1.3V), and compatible TO-220-3 package enable direct substitution. The higher 6A current rating provides additional design margin.

Q: What is the impact of the higher gate trigger current (Igt) specification on the BTA06-400CRG?

A: The BTA06-400CRG specifies a maximum Igt of 25mA compared to 10mA for the Q4004R3TP. Gate drive circuits must supply sufficient current to meet this requirement. Existing gate drive circuits designed for 10mA must be evaluated for compatibility with the 25mA specification.

Q: Are there package differences between these parts?

A: Both the Q4004R3TP and BTA06-400CRG use the TO-220-3 through-hole package. No mechanical modifications are required for substitution.

Q: What is the significance of the product status difference?

A: The Q4004R3TP is in active product status with current manufacturing and supply availability. The BTA06-400CRG is obsolete, indicating discontinued production. For new designs or long-term applications, the active status of the Q4004R3TP provides superior supply chain continuity.

Q: Do both parts meet the same regulatory requirements?

A: Yes, both the Q4004R3TP and BTA06-400CRG are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory standards for industrial and commercial applications.

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