L2004V8 Equivalent & Substitute Parts

Part Overview

The L2004V8 is a TRIAC Logic - Sensitive Gate thyristor rated for 200 V off-state voltage and 4 A on-state current, manufactured by Littelfuse Inc. in a TO-251-3 through-hole package. This component is discontinued at DiGi Electronics, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

L2004V8

Littelfuse Inc.In Stock: 850L2004V8 Datasheet

Current PartRFQ

BT134-600E,127

WeEn SemiconductorsIn Stock: 12575BT134-600E,127 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L2004V8 is determined by the following critical parameters:

• Triac Type: Logic - Sensitive Gate configuration must be maintained
• Current Rating: On-state current must be 4 A or greater
• Gate Trigger Characteristics: Vgt and Igt parameters must support the original circuit design
• Hold Current: Ih must not exceed the original specification
• Voltage Rating: Off-state voltage must meet or exceed 200 V
• Mounting Type: Through-hole configuration required for PCB compatibility
• Compliance: ROHS3 compliance required for regulatory alignment

The BT134-600E,127 meets these substitution criteria with compatible gate trigger and hold current specifications, while providing higher voltage rating and active product status.

Parameter Comparison

Engineering Selection Recommendations

The BT134-600E,127 is the manufacturer-recommended substitute for the discontinued L2004V8. Selection is supported by:

• Active product status with 12,526 units in stock, ensuring procurement availability
• Identical gate trigger and hold current specifications, maintaining circuit compatibility
• Higher voltage rating (600 V vs. 200 V) provides design margin for 200 V applications
• ROHS3 compliance and REACH affected status align with regulatory requirements
• Higher maximum junction temperature (125°C) extends thermal operating range

Package transition from TO-251-3 to SOT-82 requires PCB layout modification but does not affect electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the BT134-600E,127 directly replace the L2004V8 without circuit modification?

A: Electrical substitution is valid. Gate trigger voltage (Vgt) increases from 1.3 V to 1.5 V maximum, which is within acceptable tolerance for most logic-level gate drive circuits. Package change from TO-251-3 to SOT-82 requires PCB layout modification.

Q: Why is the voltage rating higher on the substitute part?

A: The BT134-600E,127 is rated for 600 V off-state voltage compared to the L2004V8's 200 V rating. This higher rating is acceptable for 200 V applications and provides additional design margin without affecting circuit operation.

Q: Are the gate trigger current specifications compatible?

A: Yes. Both parts specify 10 mA maximum gate trigger current (Igt) and 15 mA maximum hold current (Ih), ensuring compatible gate drive requirements.

Q: What is the impact of the package change from TO-251-3 to SOT-82?

A: SOT-82 is a through-hole package with different lead spacing and orientation. PCB footprint modification is required, but electrical performance and thermal characteristics remain compatible.

Q: Is the BT134-600E,127 compliant with current regulatory standards?

A: Yes. The substitute part is ROHS3 compliant and REACH affected, meeting current regulatory requirements for electronic component procurement.