L2004F61 Equivalent & Substitute Parts

Part Overview

The L2004F61 is a Logic - Sensitive Gate TRIAC manufactured by Littelfuse Inc., rated for 200 V off-state voltage and 4 A on-state current in a Through Hole TO-202 package. This component is classified as Obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The sensitive gate configuration enables reliable triggering at low gate currents, suitable for applications requiring precise gate control in AC switching circuits.

Substiute Parts

L2004F61

Littelfuse Inc.In Stock: 938L2004F61 Datasheet

Current PartRFQ

BT136-600D,127

WeEn SemiconductorsIn Stock: 18546BT136-600D,127 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L2004F61 is determined by the following critical parameters:

• Triac Type: Must be Logic - Sensitive Gate configuration to maintain gate control characteristics
• Current Rating: On-state current (It RMS) must be equal to or greater than 4 A
• Gate Trigger Characteristics: Voltage (Vgt) and current (Igt) parameters must support reliable triggering within the application's gate drive circuit
• Hold Current (Ih): Must not exceed the application's minimum holding current requirements
• Mounting and Package Compatibility: Through Hole mounting is required; package form factor affects PCB layout and thermal management
• Operating Temperature Range: Must accommodate the application's thermal environment
• Compliance: RoHS3 compliance ensures regulatory alignment

The BT136-600D,127 qualifies as a substitute based on matching Triac Type (Logic - Sensitive Gate), equal on-state current rating (4 A), compatible gate trigger parameters, and equivalent hold current specification. The higher off-state voltage rating (600 V vs. 200 V) provides design margin and does not prevent substitution in applications originally specified for 200 V operation.

Parameter Comparison

Engineering Selection Recommendations

The BT136-600D,127 is a qualified substitute for the obsolete L2004F61 based on the following factors:

• Functional Equivalence: Both devices are Logic - Sensitive Gate TRIACs with identical on-state current ratings (4 A) and gate trigger current specifications (5 mA maximum). The BT136-600D,127 exhibits a lower maximum gate trigger voltage (1.5 V vs. 2 V), indicating enhanced gate sensitivity that is compatible with the original application's gate drive circuit.

• Voltage Margin: The BT136-600D,127 off-state voltage rating of 600 V exceeds the original 200 V specification, providing additional design margin without compromising performance in 200 V applications.

• Temperature Performance: The BT136-600D,127 supports an extended operating temperature range (-40°C to 125°C) compared to the L2004F61 (-40°C to 110°C), offering improved thermal headroom.

• Active Production Status: The BT136-600D,127 is in active production with substantial inventory availability (18,511 pieces), ensuring long-term procurement reliability.

• Regulatory Compliance: Both devices maintain ROHS3 compliance, satisfying environmental and regulatory requirements.

• Package Consideration: The BT136-600D,127 uses a TO-220-3 package instead of the TO-202 Long Tab. This requires PCB layout modification to accommodate the different pin configuration and thermal characteristics. The TO-220 package typically offers improved thermal dissipation due to its larger form factor and direct mounting capability.

Frequently Asked Questions (FAQ)

Q: Can the BT136-600D,127 directly replace the L2004F61 without circuit modifications?

A: The BT136-600D,127 is electrically compatible with the L2004F61 for gate control and current handling. However, the different package form factor (TO-220-3 vs. TO-202 Long Tab) requires PCB layout modification. Pin spacing, mounting hole positions, and thermal management approaches differ between these packages.

Q: Why does the BT136-600D,127 have a higher voltage rating (600 V vs. 200 V)?

A: Higher voltage ratings do not prevent substitution in lower-voltage applications. The 600 V rating provides additional design margin and does not affect performance in 200 V circuits. The device will operate safely within the original 200 V specification.

Q: What is the significance of the lower gate trigger voltage (1.5 V vs. 2 V) in the BT136-600D,127?

A: The lower maximum gate trigger voltage indicates enhanced gate sensitivity. This characteristic is compatible with the original application and may reduce gate drive circuit power requirements. No circuit redesign is necessary based on this parameter difference.

Q: Are there any thermal management differences between the TO-202 and TO-220 packages?

A: The TO-220 package (BT136-600D,127) typically provides superior thermal dissipation compared to TO-202 due to its larger form factor and direct mounting surface. This may improve thermal performance in the application, though thermal design must be evaluated for the specific PCB layout.

Q: Is the BT136-600D,127 available for immediate procurement?

A: Yes, the BT136-600D,127 is in active production status with 18,511 pieces in stock, ensuring availability for design transitions from the obsolete L2004F61.

Q: Do both devices meet the same regulatory and compliance standards?

A: Yes, both the L2004F61 and BT136-600D,127 are ROHS3 compliant and carry the same ECCN (EAR99) and HTSUS classifications, ensuring equivalent regulatory standing.