P0720SARP Equivalent & Substitute Parts

Part Overview

The P0720SARP is a 65V off-state, 150A peak pulse TVS thyristor manufactured by Littelfuse in the SIDACtor® series, housed in a 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 part's primary function is transient voltage suppression in electronic circuits requiring bidirectional overvoltage protection.

Substiute Parts

P0720SARP

LittelfuseIn Stock: 5407P0720SARP Datasheet

Current PartRFQ

P0720SALRP

Littelfuse Inc.In Stock: 7687P0720SALRP Datasheet

DirectRFQ

SMP100LC-65

STMicroelectronicsIn Stock: 55194SMP100LC-65 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P0720SARP is determined by strict alignment of electrical and mechanical parameters. The critical substitution criteria are:

• Voltage rating: Off-state voltage must be 65V
• Package compatibility: DO-214AA (SMB) surface mount form factor
• Current handling: Peak pulse current capability (8/20µs and 10/1000µs ratings)
• On-state voltage and hold current characteristics
• Capacitance specifications

Two substitute parts meet these criteria:

1. P0720SALRP (Littelfuse) — Direct equivalent with identical electrical specifications and packaging, differentiated only by tape & reel packaging and active product status.

2. SMP100LC-65 (STMicroelectronics) — Functional substitute with enhanced current handling (400A vs. 150A peak pulse at 8/20µs) while maintaining the same voltage ratings, package form factor, and hold current specification.

Parameter Comparison

Engineering Selection Recommendations

P0720SALRP is the direct functional equivalent for P0720SARP replacement. Both parts share identical electrical specifications and package form factor. P0720SALRP carries active product status and ROHS3 compliance, addressing the obsolescence and regulatory limitations of the original part. This substitute is suitable for direct board-level replacement without circuit modification.

SMP100LC-65 is a functional substitute with enhanced current handling capability. The increased peak pulse current ratings (400A at 8/20µs versus 150A) provide additional transient suppression margin while maintaining voltage regulation within acceptable parameters. The slightly higher breakover voltage (85V versus 88V) and increased capacitance (90pF versus 60pF) represent minor deviations that remain within typical circuit tolerance bands for TVS thyristor applications. SMP100LC-65 is suitable for applications requiring higher transient energy absorption or where design margin enhancement is beneficial.

Both substitute parts maintain the same package footprint, mounting type, and hold current specification, ensuring mechanical and thermal compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can P0720SALRP be used as a direct replacement for P0720SARP?

A: Yes. P0720SALRP is electrically and mechanically identical to P0720SARP. The only differences are packaging format (tape & reel versus bulk) and product status (active versus obsolete). No circuit modifications are required.

Q: What are the key differences between P0720SARP and SMP100LC-65?

A: Both parts maintain 65V off-state voltage and DO-214AA package compatibility. SMP100LC-65 provides higher peak pulse current handling (400A versus 150A at 8/20µs) and slightly higher capacitance (90pF versus 60pF). The breakover voltage is marginally lower (85V versus 88V). These differences make SMP100LC-65 suitable for applications requiring enhanced transient suppression capability.

Q: Are there package compatibility concerns when substituting these parts?

A: No. All three parts use the DO-214AA (SMB) surface mount package with identical footprints and mounting requirements. PCB layout modifications are not necessary.

Q: Which substitute should be selected for new designs?

A: For direct replacement of existing P0720SARP designs, use P0720SALRP. For new designs or applications requiring enhanced transient energy absorption, SMP100LC-65 is suitable. Both parts are active products with current manufacturing support and regulatory compliance.

Q: How do RoHS compliance differences affect part selection?

A: P0720SARP is RoHS non-compliant. Both P0720SALRP and SMP100LC-65 are ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, either substitute part satisfies compliance requirements.