P1300SARP Equivalent & Substitute Parts

Part Overview

The P1300SARP is a 120V off-state, 150A peak pulse TVS thyristor manufactured by Littelfuse Inc. in the SIDACtor® series, housed in a DO-214AA SMB package. This component is classified as obsolete, making identification of suitable substitutes necessary for ongoing design support and procurement planning. The part delivers transient voltage suppression through a thyristor topology with a 160V breakover voltage and 4V on-state voltage characteristic.

Substiute Parts

P1300SARP

Littelfuse Inc.In Stock: 27684P1300SARP Datasheet

Current PartRFQ

P1300SALRP

Littelfuse Inc.In Stock: 2963P1300SALRP Datasheet

DirectRFQ

SMTPA120

STMicroelectronicsIn Stock: 10386SMTPA120 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P1300SARP is determined by matching the following critical parameters: voltage ratings (breakover and off-state), peak pulse current capability (8/20µs and 10/1000µs), hold current, package type (DO-214AA SMB), and mounting configuration (surface mount). Parts meeting these electrical and mechanical specifications are functionally equivalent for direct replacement.

Two substitute parts have been identified:

P1300SALRP (Littelfuse Inc.) — Direct manufacturer equivalent with identical electrical specifications and active product status. Packaging differs only in format (Tape & Reel vs. bulk).

SMTPA120 (STMicroelectronics) — Cross-manufacturer substitute from the TRISIL™ series meeting all critical voltage and current parameters within the allowed tolerance band.

Parameter Comparison

Engineering Selection Recommendations

P1300SALRP is the primary substitute for P1300SARP. Both parts are manufactured by Littelfuse Inc. with identical electrical specifications and the same package footprint. P1300SALRP carries active product status and ROHS3 compliance, addressing the obsolescence and regulatory limitations of the original part. This substitute requires no circuit redesign.

SMTPA120 is a secondary cross-manufacturer option from STMicroelectronics. It maintains all critical voltage and current parameters, with a 5A increase in the 10/1000µs peak pulse current rating (50A vs. 45A) and a 15pF reduction in capacitance (30pF vs. 45pF). SMTPA120 is ROHS3 compliant and actively produced. The capacitance difference may affect circuit behavior in applications with tight timing or filtering requirements; verification is necessary in such cases.

Frequently Asked Questions (FAQ)

Q: Can P1300SALRP be used as a direct drop-in replacement for P1300SARP?

A: Yes. P1300SALRP is electrically and mechanically identical to P1300SARP. Both share the same voltage ratings, current ratings, hold current, and DO-214AA SMB package. The only difference is packaging format (Tape & Reel vs. bulk) and product status (Active vs. Obsolete).

Q: What are the key differences between SMTPA120 and P1300SARP?

A: SMTPA120 matches the critical voltage and current specifications. The 10/1000µs peak pulse current is 5A higher (50A vs. 45A), and capacitance is 15pF lower (30pF vs. 45pF). Both use the same DO-214AA SMB package and surface mount configuration. SMTPA120 is manufactured by STMicroelectronics rather than Littelfuse Inc.

Q: Does the capacitance difference between SMTPA120 and P1300SARP affect substitution?

A: Capacitance differences may impact circuit performance in applications where transient response timing or filtering characteristics are critical. The 15pF reduction in SMTPA120 represents a 33% decrease from the original 45pF specification. Circuit validation is required for applications sensitive to capacitive loading.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both P1300SALRP and SMTPA120 are ROHS3 compliant. The original P1300SARP is RoHS non-compliant, making either substitute suitable for designs requiring regulatory compliance.

Q: Can SMTPA120 be used in all applications where P1300SARP was specified?

A: SMTPA120 is electrically compatible for voltage and current suppression functions. However, the capacitance difference and cross-manufacturer sourcing require circuit validation, particularly in timing-sensitive or high-frequency transient applications.