Equivalent & Substitute Parts for Q2006R4 TRIAC

Part Overview

The Q2006R4 is a standard TRIAC manufactured by Littelfuse Inc., rated for 200V off-state voltage and 6A on-state current in a TO-220 through-hole package. This component is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing system maintenance and new design implementations where legacy component replacement is required.

Substiute Parts

Q2006R4

Littelfuse Inc.In Stock: 782Q2006R4 Datasheet

Current PartRFQ

BT137-600E,127

WeEn SemiconductorsIn Stock: 39327BT137-600E,127 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Q2006R4 is determined by the following critical parameters:

• Package Compatibility: TO-220-3 through-hole mounting ensures mechanical and thermal interface compatibility
• Voltage Rating: The off-state voltage must equal or exceed 200V to maintain circuit protection margins
• Current Rating: The on-state current (It RMS) must equal or exceed 6A to handle the design load
• Gate Trigger Characteristics: Vgt and Igt parameters must be compatible with existing gate drive circuitry
• Temperature Range: Operating temperature capability must support the application environment
• Regulatory Compliance: RoHS3 compliance ensures material restriction adherence

The BT137-600E,127 qualifies as a substitute based on these parameters, with enhanced voltage and current ratings that provide design margin while maintaining compatible gate trigger characteristics and package form factor.

Parameter Comparison

Engineering Selection Recommendations

The BT137-600E,127 is an active product from WeEn Semiconductors and serves as a functional substitute for the obsolete Q2006R4. Selection is based on:

• Product Availability: BT137-600E,127 maintains active production status with substantial inventory availability (39,300 pcs), ensuring supply chain continuity
• Regulatory Compliance: Both components maintain ROHS3 compliance, satisfying material restriction requirements
• Electrical Margin: The BT137-600E,127 provides enhanced voltage (600V vs 200V) and current (8A vs 6A) ratings, establishing design safety margins
• Package Compatibility: Identical TO-220-3 package enables direct mechanical and thermal interface compatibility without PCB redesign
• Gate Drive Efficiency: The BT137-600E,127 exhibits lower gate trigger current (10mA vs 25mA) and hold current (20mA vs 50mA), reducing gate drive circuit loading

Frequently Asked Questions (FAQ)

Q: Can the BT137-600E,127 be used as a direct replacement for Q2006R4 without circuit modification?

A: The BT137-600E,127 is mechanically and electrically compatible for direct substitution in TO-220-3 socket applications. The identical package form factor and compatible gate trigger voltage range (1.5V vs 1.3V maximum) support direct replacement. The lower gate trigger current requirement (10mA vs 25mA) may reduce gate drive circuit loading, which is beneficial for circuit performance.

Q: What are the key differences between these two TRIACs?

A: The primary differences are voltage rating (600V vs 200V), current rating (8A vs 6A), gate trigger type (Logic - Sensitive Gate vs Standard), and gate drive requirements (10mA vs 25mA gate trigger current). The BT137-600E,127 provides higher electrical ratings and more efficient gate drive characteristics.

Q: Is the BT137-600E,127 suitable for applications originally designed for 200V operation?

A: Yes. The BT137-600E,127 is rated for 600V off-state voltage, which exceeds the 200V requirement of the original design. This higher rating provides design margin and does not compromise functionality in 200V applications.

Q: Are there any thermal or mounting considerations when substituting these components?

A: Both components use identical TO-220-3 packages with equivalent thermal characteristics. Mounting hardware, heatsink interfaces, and thermal management approaches remain unchanged. Operating temperature range is identical (-40°C to 125°C).

Q: What is the impact of the BT137-600E,127's lower gate trigger current on existing gate drive circuits?

A: The BT137-600E,127 requires 10mA maximum gate trigger current compared to 25mA for the Q2006R4. Existing gate drive circuits designed for 25mA operation will function correctly with the lower requirement, potentially improving circuit efficiency and reducing power dissipation in the gate drive stage.