P3500SARP Equivalent & Substitute Parts

Part Overview

The P3500SARP is a 320V off-state, 150A peak pulse TVS thyristor manufactured by Littelfuse Inc. in the SIDACtor® series, housed in a DO-214AA (SMB) surface mount package. This component is classified as obsolete, making identification of suitable substitutes necessary for ongoing design support and procurement planning. The part provides transient voltage suppression through thyristor-based protection in compact surface mount form factor.

Substiute Parts

P3500SARP

Littelfuse Inc.In Stock: 8612P3500SARP Datasheet

Current PartRFQ

P3500SALRP

Littelfuse Inc.In Stock: 10202P3500SALRP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P3500SARP is determined by equivalence across the following critical parameters:

Voltage ratings (breakover, off-state, and on-state) must remain identical to maintain circuit protection thresholds. Peak pulse current ratings at both 8/20µs and 10/1000µs pulse widths must match to ensure the component can handle the same transient energy. Hold current (Ih) must be equivalent to preserve latching behavior. The single-element configuration and capacitance value (35pF) are fixed requirements. Package and mounting type (DO-214AA, SMB, surface mount) must be identical for PCB compatibility.

The P3500SALRP meets all these criteria as a direct electrical and mechanical equivalent, with identical voltage and current specifications, element count, and package configuration.

Parameter Comparison

Engineering Selection Recommendations

The P3500SALRP is the direct substitute for the P3500SARP. Both components are manufactured by Littelfuse Inc. and share identical electrical and mechanical specifications across all critical parameters. The primary distinction is product status: the P3500SARP is obsolete while the P3500SALRP is active, ensuring continued availability and supply chain support.

The P3500SALRP additionally carries ROHS3 compliance, whereas the P3500SARP is non-compliant. For applications subject to RoHS regulations or environmental compliance requirements, the P3500SALRP is the appropriate selection. For legacy systems or applications without compliance mandates, both parts are electrically interchangeable.

Frequently Asked Questions (FAQ)

Q: Can the P3500SALRP replace the P3500SARP in existing designs?

A: Yes. The P3500SALRP is electrically and mechanically identical to the P3500SARP. All voltage ratings, current ratings, capacitance, and package specifications are equivalent. Direct substitution is possible without circuit modification.

Q: What is the difference between these two part numbers?

A: The primary differences are product status and RoHS compliance. The P3500SARP is obsolete and RoHS non-compliant. The P3500SALRP is active and ROHS3 compliant. Electrical performance is identical.

Q: Are there packaging differences between P3500SARP and P3500SALRP?

A: No. Both parts use the DO-214AA (SMB) surface mount package. PCB footprint and mounting requirements are identical.

Q: Why should I use P3500SALRP instead of P3500SARP?

A: The P3500SALRP is the active product with ongoing manufacturer support and availability. The P3500SARP is obsolete and subject to supply discontinuation. For new designs or component replenishment, P3500SALRP is the recommended selection.

Q: Do these parts have the same hold current specification?

A: Yes. Both the P3500SARP and P3500SALRP have a hold current (Ih) of 150mA, ensuring identical latching behavior in circuit operation.