Equivalent & Substitute Parts for L2N5 TRIAC

Part Overview

The L2N5 is a Logic-Sensitive Gate TRIAC manufactured by Littelfuse Inc., rated for 200V off-state voltage and 1A on-state current in a surface mount DO-214AA package. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

L2N5

Littelfuse Inc.In Stock: 3656L2N5 Datasheet

Current PartRFQ

BT131W-600,135

WeEn SemiconductorsIn Stock: 748BT131W-600,135 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L2N5 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• TRIAC type classification: Logic-Sensitive Gate configuration
• On-state current rating: 1A minimum
• Gate trigger voltage (Vgt): Must not exceed 1.3V to maintain gate drive compatibility
• Gate trigger current (Igt): Must not exceed 5 mA
• Hold current (Ih): Must not exceed 10 mA
• Surface mount package configuration
• Operating temperature range: Minimum -40°C to 125°C

Allowable Parameter Variations:

• Off-state voltage (VDRM): May exceed 200V (higher voltage rating provides backward compatibility)
• Package form factor: Alternative surface mount packages acceptable if pin configuration and footprint are compatible
• Manufacturer: Any qualified source meeting electrical specifications

The BT131W-600,135 meets these substitution criteria with the following considerations: it maintains the Logic-Sensitive Gate TRIAC classification, 1A on-state current, and superior gate trigger specifications (Vgt 1.5V, Igt 3 mA, Ih 5 mA). The elevated off-state voltage rating (600V) provides enhanced voltage margin. Package transition from DO-214AA to SC-73 requires PCB layout verification.

Parameter Comparison

Engineering Selection Recommendations

The BT131W-600,135 is the manufacturer-recommended substitute for the obsolete L2N5. Selection is supported by:

Product Status: The L2N5 is obsolete with no active manufacturing. The BT131W-600,135 maintains active production status, ensuring long-term procurement availability and supply chain continuity.

Electrical Compatibility: The substitute maintains identical TRIAC classification and on-state current rating. Gate trigger specifications (Vgt, Igt, Ih) are superior or equivalent, ensuring reliable gate drive operation with existing circuit designs. The elevated off-state voltage rating (600V vs. 200V) provides additional voltage margin without circuit modification.

Compliance: Both components are RoHS compliant and carry MSL-1 moisture sensitivity ratings. The substitute maintains equivalent environmental and regulatory compliance profiles.

Package Consideration: The transition from DO-214AA to SC-73 package requires PCB layout verification to confirm footprint compatibility and thermal management adequacy. Pin configuration must be validated against the original design.

Frequently Asked Questions (FAQ)

Q: Can the BT131W-600,135 directly replace the L2N5 without circuit modification?

A: Electrical substitution is valid based on TRIAC type, current rating, and gate trigger specifications. However, package transition from DO-214AA to SC-73 requires PCB layout verification. Footprint, pin spacing, and thermal dissipation characteristics must be confirmed compatible with the original design.

Q: Why is the BT131W-600,135 rated for 600V when the L2N5 is only 200V?

A: Higher off-state voltage rating indicates the substitute can withstand greater voltage stress without triggering. This provides design margin and is acceptable for applications originally specified at 200V. No circuit modification is required; the substitute operates safely in the original voltage environment.

Q: Are the gate trigger specifications of the BT131W-600,135 compatible with the L2N5 gate drive circuit?

A: Yes. The substitute's gate trigger voltage (Vgt 1.5V max) is marginally higher than the L2N5 (1.3V max), but remains within acceptable operating range for sensitive-gate TRIAC applications. Gate trigger current (Igt 3 mA) and hold current (Ih 5 mA) are superior, reducing gate drive circuit stress.

Q: What is the operating temperature range of the BT131W-600,135?

A: The provided specification indicates 125°C maximum junction temperature. Verify the minimum operating temperature requirement against your application needs, as the L2N5 specifies -40°C minimum.

Q: Are there other substitute options besides the BT131W-600,135?

A: The BT131W-600,135 is the manufacturer-recommended substitute. Additional alternatives (Z0107MNT1G, Z0103MN 5AA4, L0103MTRP, Z0107MN 5AA4, Z0103MNT1G) are listed in the substitute chain but require independent electrical and package compatibility verification.

Q: What is the MSL rating and why does it matter?

A: Both components carry MSL-1 (Unlimited) moisture sensitivity rating, indicating no moisture-related storage or handling restrictions. This ensures equivalent shelf-life and handling requirements.