Littelfuse P1300SC TVS Thyristor Equivalent & Substitute Parts

Part Overview

The Littelfuse P1300SC is a 120V off-state, 400A peak pulse TVS thyristor in DO-214AA (SMB) surface mount package, part of the SIDACtor® series. This component is classified as obsolete, making identification of suitable alternatives necessary for ongoing design support and procurement continuity. The P1300SC provides transient voltage suppression with a 160V breakover voltage and 4V on-state voltage, designed for protection applications requiring high peak pulse current handling.

Substiute Parts

P1300SC

LittelfuseIn Stock: 10292P1300SC Datasheet

Current PartRFQ

P1300SCLRP

Littelfuse Inc.In Stock: 17137P1300SCLRP Datasheet

DirectRFQ

SMTPA120

STMicroelectronicsIn Stock: 10386SMTPA120 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P1300SC is determined by matching the following critical electrical and mechanical parameters:

• Voltage - Breakover: 160V
• Voltage - Off State: 120V
• Current - Peak Pulse (8/20µs): 400A minimum
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Number of Elements: 1

Two substitute options are identified based on these criteria:

Direct Manufacturer Substitute (Littelfuse P1300SCLRP): Identical electrical specifications with tape & reel packaging. Differs only in product status (active vs. obsolete) and RoHS compliance level.

Cross-Manufacturer Substitute (STMicroelectronics SMTPA120): Maintains voltage parameters and package compatibility but with reduced peak pulse current rating (150A vs. 400A at 8/20µs pulse).

Parameter Comparison

Engineering Selection Recommendations

P1300SCLRP (Littelfuse): This is the primary substitute for P1300SC. It maintains identical electrical specifications and package configuration while offering active product status and ROHS3 compliance. The only distinction is packaging format (tape & reel vs. bulk), which does not affect electrical performance or mechanical compatibility.

SMTPA120 (STMicroelectronics): This cross-manufacturer option is suitable only for applications where peak pulse current requirements do not exceed 150A at 8/20µs pulse duration. The reduced current rating and capacitance (30pF vs. 105pF) represent functional differences that must be evaluated against specific circuit protection requirements. This part maintains voltage compatibility and package form factor.

Frequently Asked Questions (FAQ)

Q: Can P1300SCLRP be used as a direct replacement for P1300SC? A: Yes. P1300SCLRP is electrically and mechanically identical to P1300SC. The difference in product status (active vs. obsolete) and RoHS compliance does not affect functional substitution. Packaging format (tape & reel) is a procurement consideration only.

Q: What are the limitations of SMTPA120 as a substitute? A: SMTPA120 has reduced peak pulse current ratings: 150A at 8/20µs (vs. 400A) and 50A at 10/1000µs (vs. 100A). It also has lower capacitance (30pF vs. 105pF). These differences require circuit-level evaluation to confirm suitability for the intended protection application.

Q: Are all three parts in the same package? A: Yes. P1300SC, P1300SCLRP, and SMTPA120 all use DO-214AA (SMB) surface mount package with identical mechanical footprints and mounting requirements.

Q: What is the significance of the voltage parameters? A: Breakover voltage (160V) and off-state voltage (120V) determine the transient suppression threshold. All three parts share these values, ensuring equivalent protection triggering characteristics. On-state voltage (4V) affects clamping performance during transient events.

Q: Does RoHS compliance affect electrical performance? A: No. RoHS compliance is a material composition and environmental standard. It does not alter electrical specifications or functional performance of the TVS thyristor.