P0720SA Equivalent & Substitute Parts

Part Overview

The P0720SA is a 65V off-state, 150A peak pulse TVS thyristor manufactured by Littelfuse Inc. in the DO-214AA (SMB) package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The part operates within the SIDACtor® series and provides transient voltage suppression for circuit protection applications.

Substiute Parts

P0720SA

Littelfuse Inc.In Stock: 10203P0720SA Datasheet

Current PartRFQ

P0720SALRP

Littelfuse Inc.In Stock: 7687P0720SALRP Datasheet

DirectRFQ

SMP100LC-65

STMicroelectronicsIn Stock: 55194SMP100LC-65 Datasheet

MFR RecommendedRFQ

SMTPA68

STMicroelectronicsIn Stock: 25363SMTPA68 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P0720SA is determined by the following critical parameters: off-state voltage (65V), peak pulse current capability (8/20µs rating), on-state voltage, hold current, and package compatibility (DO-214AA/SMB). The substitute parts are grouped into two categories:

Direct Equivalent: P0720SALRP maintains identical electrical specifications and differs only in packaging format (Tape & Reel) and product status (Active vs. Obsolete).

Functional Equivalents: SMP100LC-65 and SMTPA68 provide alternative solutions with comparable voltage ratings and current handling, though with variations in peak pulse current and capacitance characteristics.

Parameter Comparison

Engineering Selection Recommendations

P0720SALRP is the direct equivalent for P0720SA applications. It provides identical electrical performance with the advantage of active product status and ROHS3 compliance. This part is recommended as the primary replacement for obsolete P0720SA inventory.

SMP100LC-65 (STMicroelectronics) offers enhanced current handling capability at 400A peak pulse (8/20µs) compared to the 150A rating of P0720SA. This part is suitable for applications requiring higher transient current suppression within the same 65V off-state voltage class. The increased capacitance (90pF) and higher 10/1000µs pulse current (100A) should be evaluated for circuit compatibility.

SMTPA68 (STMicroelectronics) maintains the 150A peak pulse current rating of P0720SA with a 68V off-state voltage and 90V breakover voltage. This part is applicable where the 3V off-state voltage differential is acceptable. The lower capacitance (40pF) may be advantageous in applications sensitive to parasitic capacitance effects.

All substitute parts are ROHS3 compliant and available in active production status, ensuring long-term supply continuity.

Frequently Asked Questions (FAQ)

Q: Can P0720SALRP directly replace P0720SA in existing designs? A: Yes. P0720SALRP is electrically and mechanically identical to P0720SA, differing only in packaging format (Tape & Reel) and product status. No circuit modifications are required.

Q: What is the primary difference between P0720SA and SMP100LC-65? A: SMP100LC-65 provides 400A peak pulse current (8/20µs) versus 150A for P0720SA, while maintaining the same 65V off-state voltage. The increased current rating and capacitance (90pF vs. 60pF) must be verified for circuit compatibility.

Q: Is SMTPA68 compatible with P0720SA applications? A: SMTPA68 is compatible where the 68V off-state voltage (versus 65V) and 90V breakover voltage (versus 88V) fall within circuit design tolerances. The 150A peak pulse current rating matches P0720SA. The lower capacitance (40pF) should be evaluated for specific circuit requirements.

Q: Why is P0720SA listed as obsolete? A: P0720SA has been discontinued by Littelfuse Inc. P0720SALRP (active status) provides the direct replacement path for ongoing production and new designs.

Q: Are all substitute parts available in DO-214AA/SMB packaging? A: Yes. All listed substitute parts use the DO-214AA (SMB) surface mount package, ensuring mechanical compatibility with existing PCB layouts.

Q: What compliance certifications apply to substitute parts? A: P0720SALRP, SMP100LC-65, and SMTPA68 are all ROHS3 compliant. SMP100LC-65 is REACH unaffected; P0720SALRP and SMTPA68 status varies by region.