Equivalent & Substitute Parts for L6N3 TRIAC

Part Overview

The L6N3 is a logic-sensitive gate TRIAC rated for 600V off-state voltage and 1A on-state current in a surface mount DO-214 package. Manufactured by Littelfuse Inc., this component is classified as obsolete. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity and procurement planning. Substitute parts must maintain identical electrical performance characteristics and compatible package specifications to ensure direct replacement capability.

Substiute Parts

L6N3

Littelfuse Inc.In Stock: 1169L6N3 Datasheet

Current PartRFQ

L6N3RP

LittelfuseIn Stock: 4159L6N3RP Datasheet

DirectRFQ

BT131W-600,135

WeEn SemiconductorsIn Stock: 748BT131W-600,135 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the L6N3 are qualified based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

• Voltage - Off State: 600 V (exact match required)
• Current - On State (It (RMS)) (Max): 1 A (exact match required)
• Voltage - Gate Trigger (Vgt) (Max): ≤ 1.3 V (equal or lower acceptable)
• Current - Gate Trigger (Igt) (Max): 3 mA (exact match required)
• Current - Hold (Ih) (Max): 5 mA (exact match required)
• Triac Type: Logic - Sensitive Gate (exact match required)
• Configuration: Single (exact match required)
• Mounting Type: Surface Mount (exact match required)

Package Compatibility:

• Primary package: DO-214AA, SMB (3 Leads)
• Alternative packages: SC-73 (TO-261-4, TO-261AA) acceptable with PCB layout verification

Two substitute parts meet these criteria with varying degrees of direct compatibility.

Parameter Comparison

Engineering Selection Recommendations

L6N3RP (Littelfuse) - Recommended Direct Substitute

L6N3RP is the primary substitute for L6N3. Both parts are manufactured by Littelfuse and share identical electrical specifications across all critical parameters. The L6N3RP maintains the same voltage ratings (600V off-state), current ratings (1A on-state), gate trigger characteristics (1.3V max, 3mA max), and operating temperature range (-40°C to 125°C). Package specifications are identical (DO-214AA, SMB 3-lead). L6N3RP is currently in active production status with higher inventory availability (4080 pcs vs. 1091 pcs for L6N3). Both parts carry ROHS3 compliance and MSL Level 1 rating. The only difference is packaging format: L6N3RP is supplied in Tape & Reel format, whereas L6N3 is supplied in bulk. This substitute requires no design modifications and provides direct pin-for-pin compatibility.

BT131W-600,135 (WeEn Semiconductors) - Alternative Substitute

BT131W-600,135 is a functionally equivalent alternative manufactured by WeEn Semiconductors. It maintains the same 600V off-state voltage, 1A on-state current, 3mA gate trigger current, and 5mA hold current specifications. However, three parameter differences exist: (1) Gate trigger voltage is 1.5V maximum versus 1.3V for L6N3, representing a 15% relaxation in this specification; (2) Non-repetitive surge current ratings are lower (12.5A/13.8A versus 16.7A/20A), indicating reduced transient capability; (3) Operating temperature range is specified as 125°C maximum versus -40°C to 125°C for L6N3, indicating no low-temperature specification. The package is SC-73 (TO-261-4, TO-261AA) rather than DO-214AA, requiring PCB layout modification. BT131W-600,135 carries RoHS compliance and MSL Level 1 rating. This substitute is suitable only when the relaxed gate trigger voltage, reduced surge current capability, and package change are acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can L6N3RP be used as a direct replacement for L6N3?

A: Yes. L6N3RP is a direct substitute with identical electrical specifications and package configuration. Both are Littelfuse logic-sensitive gate TRIACs rated 600V/1A with matching gate trigger characteristics. The only difference is packaging format (Tape & Reel versus bulk). No design modifications are required.

Q: What are the limitations of BT131W-600,135 as a substitute?

A: BT131W-600,135 has three limitations: (1) Gate trigger voltage is specified at 1.5V maximum instead of 1.3V, which may affect gate drive circuit design; (2) Non-repetitive surge current is lower (12.5A/13.8A versus 16.7A/20A), reducing transient protection margin; (3) Operating temperature range is limited to 125°C maximum with no low-temperature specification, versus -40°C to 125°C for L6N3. Additionally, the package is SC-73 instead of DO-214AA, requiring PCB layout changes.

Q: Are there package compatibility issues between DO-214AA and SC-73?

A: Yes. DO-214AA (SMB) and SC-73 (TO-261-4) are different package outlines with different pin configurations and footprints. Direct PCB substitution is not possible without layout modification. Pin assignment must be verified before implementation.

Q: What compliance certifications apply to these substitute parts?

A: L6N3RP carries ROHS3 compliance. BT131W-600,135 carries RoHS compliance. Both parts have Moisture Sensitivity Level 1 (unlimited shelf life). All three parts (L6N3, L6N3RP, BT131W-600,135) are classified under ECCN EAR99 and HTSUS 8541.30.0080.

Q: Which substitute should be selected for new designs?

A: L6N3RP is the recommended choice for new designs due to identical specifications, same package, and active production status. BT131W-600,135 should be considered only when the relaxed gate trigger voltage, reduced surge current capability, and package change are explicitly acceptable for the application requirements.