Q4006R4TP TRIAC Equivalent & Substitute Parts

Part Overview

The Q4006R4TP is a standard TRIAC manufactured by Littelfuse, rated for 400V off-state voltage and 6A on-state current in a TO-220AB through-hole package. This component is actively produced and fully compliant with RoHS3 and REACH regulations. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required for circuit applications, inventory management, or supply chain continuity.

Substiute Parts

Q4006R4TP

LittelfuseIn Stock: 1090Q4006R4TP Datasheet

Current PartRFQ

BTA08-400BRG

STMicroelectronicsIn Stock: 3733BTA08-400BRG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Q4006R4TP are identified based on the following criteria:

• Off-state voltage rating of 400V or higher
• On-state current rating equal to or greater than 6A
• Gate trigger voltage (Vgt) of 1.3V or lower
• Gate trigger current (Igt) of 25mA or lower
• Hold current (Ih) of 50mA or lower
• TO-220-3 package configuration for mechanical compatibility
• Through-hole mounting type
• Operating temperature range of -40°C to 125°C or wider
• Active product status with current manufacturing availability
• RoHS3 compliance and REACH unaffected status

The BTA08-400BRG meets these substitution criteria with equivalent or superior electrical ratings and identical mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The BTA08-400BRG is a direct substitute for the Q4006R4TP based on the following factors:

• Both components maintain identical 400V off-state voltage ratings, ensuring equivalent circuit protection levels
• The BTA08-400BRG provides 8A on-state current capacity, exceeding the 6A requirement of the Q4006R4TP
• Gate trigger parameters are compatible, with the BTA08-400BRG operating within acceptable thresholds for circuit control
• Both components are housed in TO-220-3 packages with through-hole mounting, providing identical mechanical fit and thermal management characteristics
• Both parts maintain active product status with current manufacturing availability
• Both components satisfy RoHS3 compliance and REACH unaffected requirements for regulated applications

Frequently Asked Questions (FAQ)

Q: Can the BTA08-400BRG replace the Q4006R4TP in existing circuit designs?

A: Yes. The BTA08-400BRG meets all substitution criteria with equivalent voltage ratings, compatible gate trigger characteristics, and identical package configuration. The higher current rating provides additional design margin.

Q: What is the significance of the higher 8A current rating in the BTA08-400BRG?

A: The BTA08-400BRG is rated for 8A on-state current compared to the Q4006R4TP's 6A rating. This higher rating does not prevent substitution; it indicates the component can handle greater load current without exceeding thermal limits, providing additional operational headroom in the circuit.

Q: Are the gate trigger parameters compatible between these two TRIACs?

A: Yes. Both components specify a maximum gate trigger voltage (Vgt) of 1.3V. The BTA08-400BRG specifies a maximum gate trigger current (Igt) of 50mA compared to the Q4006R4TP's 25mA. This difference does not affect substitution compatibility, as the circuit control requirements remain within acceptable operating parameters.

Q: Do both components fit the same PCB footprint?

A: Yes. Both the Q4006R4TP and BTA08-400BRG use the TO-220-3 package with through-hole mounting configuration, providing identical mechanical compatibility and thermal interface characteristics.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both components are RoHS3 compliant and REACH unaffected, meeting identical regulatory requirements for industrial and consumer applications.