P3100SARP Equivalent & Substitute Parts

Part Overview

The P3100SARP is a 275V off-state, 150A peak pulse TVS thyristor manufactured by Littelfuse Inc. in the DO-214AA (SMB) surface mount package. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity. The SIDACtor® series thyristor provides transient voltage suppression for circuit protection applications requiring the specified electrical and mechanical characteristics.

Substiute Parts

P3100SARP

Littelfuse Inc.In Stock: 5956P3100SARP Datasheet

Current PartRFQ

P3100SALRP

Littelfuse Inc.In Stock: 35476P3100SALRP Datasheet

DirectRFQ

TISP4350T3BJR-S

Bourns Inc.In Stock: 6161TISP4350T3BJR-S Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P3100SARP are identified based on strict electrical and mechanical parameter compatibility within the TVS thyristor category. The substitution logic requires matching or exceeding the following critical parameters:

• Voltage - Breakover: 350V (exact match required)
• Voltage - Off State: 275V (exact match required)
• Current - Hold (Ih): 150mA (exact match required)
• Number of Elements: 1 (exact match required)
• Package / Case: DO-214AA, SMB (exact match required)
• Mounting Type: Surface Mount (exact match required)

Parameters that may vary within acceptable substitution criteria include peak pulse current ratings (8/20µs and 10/1000µs), on-state voltage, and capacitance, provided the substitute part meets or exceeds the performance requirements of the original design.

Parameter Comparison

Engineering Selection Recommendations

P3100SALRP is the direct equivalent substitute for P3100SARP. Both components are manufactured by Littelfuse Inc. with identical electrical specifications and package configuration. The P3100SALRP is currently in active product status with ROHS3 compliance, addressing the obsolescence of the original part while maintaining full electrical and mechanical compatibility.

TISP4350T3BJR-S from Bourns Inc. is a manufacturer-recommended alternative that meets all critical substitution parameters. This part provides enhanced peak pulse current ratings (250A at 8/20µs versus 150A) and improved current handling at 10/1000µs (80A versus 45A). The TISP4350T3BJR-S maintains identical breakover voltage, off-state voltage, hold current, and package configuration. The on-state voltage is reduced to 3V, and capacitance is increased to 52pF. This part is ROHS3 compliant and currently active in production.

Selection between P3100SALRP and TISP4350T3BJR-S depends on design margin requirements. For applications requiring exact electrical matching, P3100SALRP is the preferred choice. For applications benefiting from higher current handling capability, TISP4350T3BJR-S provides additional performance headroom.

Frequently Asked Questions (FAQ)

Q: Can P3100SALRP be used as a direct replacement for P3100SARP?

A: Yes. P3100SALRP is electrically and mechanically identical to P3100SARP with matching voltage ratings, current specifications, hold current, and DO-214AA package configuration. The primary difference is product status; P3100SALRP is active while P3100SARP is obsolete.

Q: What are the key differences between P3100SALRP and TISP4350T3BJR-S?

A: Both parts share identical breakover voltage (350V), off-state voltage (275V), hold current (150mA), and package type (DO-214AA, SMB). TISP4350T3BJR-S provides higher peak pulse current ratings (250A versus 150A at 8/20µs) and lower on-state voltage (3V versus 4V). Capacitance differs at 52pF versus 35pF.

Q: Are all substitute parts surface mount compatible?

A: Yes. P3100SARP, P3100SALRP, and TISP4350T3BJR-S are all surface mount components in the DO-214AA (SMB) package, suitable for automated assembly processes.

Q: Do substitute parts meet RoHS compliance requirements?

A: P3100SALRP and TISP4350T3BJR-S are both ROHS3 compliant. The original P3100SARP is RoHS non-compliant.

Q: Which substitute part should be selected for new designs?

A: For new designs, either P3100SALRP or TISP4350T3BJR-S is acceptable based on electrical requirements. P3100SALRP provides exact electrical matching to the original specification. TISP4350T3BJR-S offers enhanced current handling capability for applications requiring additional performance margin.