L4N5RP TRIAC Equivalent & Substitute Parts

Part Overview

The L4N5RP is a Logic-Sensitive Gate TRIAC manufactured by Littelfuse Inc., rated for 400V off-state voltage and 1A on-state current in a surface mount DO-214 package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when electrical parameters and mechanical compatibility remain within acceptable tolerances for the application, ensuring functional equivalence in circuit operation.

Substiute Parts

L4N5RP

Littelfuse Inc.In Stock: 710L4N5RP Datasheet

Current PartRFQ

Q4N3RP

Littelfuse Inc.In Stock: 20084Q4N3RP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Q4N3RP qualifies as a direct substitute for the L4N5RP based on the following criteria:

Matching Parameters:

• Voltage - Off State: 400V (identical)
• Current - On State (It (RMS)) (Max): 1A (identical)
• Voltage - Gate Trigger (Vgt) (Max): 1.3V (identical)
• Current - Non Rep. Surge (50/60Hz): 16.7A / 20A (identical)
• Operating Temperature Range: -40°C to 125°C (identical)
• Package / Case: DO-214AA, SMB (3 Leads), Compak (mechanically compatible)
• Mounting Type: Surface Mount (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)

Allowable Parameter Variations:

• Current - Gate Trigger (Igt) (Max): Q4N3RP rated at 10mA vs. L4N5RP at 5mA (higher rating acceptable for substitution)
• Current - Hold (Ih) (Max): Q4N3RP rated at 15mA vs. L4N5RP at 10mA (higher rating acceptable for substitution)

These variations represent relaxed specifications in the substitute part, which do not compromise circuit functionality or safety margins.

Parameter Comparison

Engineering Selection Recommendations

Both L4N5RP and Q4N3RP are Active product status components manufactured by Littelfuse Inc. with identical RoHS3 and REACH compliance certifications. The Q4N3RP is suitable for direct substitution in applications where the L4N5RP is specified, provided that the higher gate trigger current (Igt) and hold current (Ih) ratings do not conflict with circuit design constraints. Both components maintain the same thermal operating range and package footprint, ensuring mechanical and thermal compatibility in surface mount applications. Selection between these parts should be based on availability and inventory considerations rather than electrical performance differences.

Frequently Asked Questions (FAQ)

Q: Can Q4N3RP replace L4N5RP in existing designs? A: Yes. Both parts share identical voltage ratings, on-state current, gate trigger voltage, and surge current specifications. The Q4N3RP has higher gate trigger current and hold current ratings, which represent relaxed specifications and do not prevent substitution.

Q: Are the packages mechanically identical? A: Yes. Both components use the DO-214AA SMB (3 Leads) Compak package for surface mount applications. PCB footprints and reflow soldering profiles are compatible.

Q: Do compliance certifications differ between these parts? A: No. Both L4N5RP and Q4N3RP carry identical RoHS3 compliance, REACH Unaffected status, and Moisture Sensitivity Level 1 (Unlimited) ratings.

Q: What is the significance of the higher Igt and Ih ratings in Q4N3RP? A: The Q4N3RP specifies maximum gate trigger current of 10mA and hold current of 15mA, compared to 5mA and 10mA in the L4N5RP. These higher values indicate relaxed specifications and do not degrade circuit performance. The substitute part will function identically in gate-triggering and holding operations.

Q: Are there thermal performance differences? A: No. Both components operate across the identical temperature range of -40°C to 125°C (TJ) and share the same thermal characteristics for the DO-214 package.