P0300SA Equivalent & Substitute Parts

Part Overview

The P0300SA is a 25V off-state, 150A peak pulse (8/20µs) TVS thyristor manufactured by Littelfuse Inc. in the SIDACtor® series, packaged in DO-214AA (SMB). This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design support and procurement.

Substiute Parts

P0300SA

Littelfuse Inc.In Stock: 37863P0300SA Datasheet

Current PartRFQ

P0300SALRP

Littelfuse Inc.In Stock: 5990P0300SALRP Datasheet

DirectRFQ

SMP100LC-25

STMicroelectronicsIn Stock: 17976SMP100LC-25 Datasheet

MFR RecommendedRFQ

SMP100LC-35

STMicroelectronicsIn Stock: 45354SMP100LC-35 Datasheet

MFR RecommendedRFQ

TISP4040H1BJR-S

Bourns Inc.In Stock: 29309TISP4040H1BJR-S Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P0300SA is determined by the following critical parameters:

• Voltage - Off State: Must be 25V to maintain circuit protection threshold
• Package / Case: Must be DO-214AA (SMB) for mechanical and electrical compatibility
• Mounting Type: Must be Surface Mount
• Current Rating: Peak pulse current capability determines suitability for the application

Substitute parts are grouped into two categories:

Direct Equivalent (Same Electrical Specifications): P0300SALRP maintains identical electrical characteristics and is the direct active replacement from the same manufacturer.

Functional Equivalents (Enhanced Current Capability): TISP4040H1BJR-S, SMP100LC-25, and SMP100LC-35 provide higher peak pulse current ratings (400A) while maintaining the same off-state voltage and package format. These parts offer improved transient suppression capability within the same form factor.

Parameter Comparison

Engineering Selection Recommendations

P0300SALRP is the primary replacement for P0300SA. It is manufactured by Littelfuse Inc., maintains identical electrical specifications, and is ROHS3 compliant with active product status. This part is suitable for direct substitution in existing designs without circuit modification.

TISP4040H1BJR-S (Bourns Inc.) provides a functional equivalent with 400A peak pulse capability, matching the P0300SA breakover voltage and on-state voltage. It is ROHS3 compliant and active. The higher current rating provides enhanced transient suppression margin. REACH status is affected.

SMP100LC-25 (STMicroelectronics) offers 400A peak pulse capability with identical 25V off-state voltage and 35V breakover voltage. It is ROHS3 compliant and active. Lower capacitance (65pF) compared to the original part may affect circuit behavior in high-frequency applications.

SMP100LC-35 (STMicroelectronics) provides 400A peak pulse capability with 35V off-state voltage and 55V breakover voltage. This part is suitable only for circuits designed for higher voltage thresholds. It is ROHS3 compliant and active.

All substitute parts maintain DO-214AA (SMB) packaging and surface mount compatibility.

Frequently Asked Questions (FAQ)

Q: Can P0300SALRP be used as a direct replacement for P0300SA?

A: Yes. P0300SALRP is the direct equivalent from Littelfuse Inc., maintaining identical electrical specifications including 25V off-state voltage, 40V breakover voltage, 150A peak pulse current (8/20µs), and 50mA hold current. It is ROHS3 compliant and active.

Q: What is the difference between the P0300SA and TISP4040H1BJR-S?

A: Both parts share the same 25V off-state voltage, 40V breakover voltage, and DO-214AA package. The TISP4040H1BJR-S provides higher peak pulse current (400A vs. 150A at 8/20µs) and lower on-state voltage (3V vs. 4V). The higher current rating provides greater transient suppression capability.

Q: Can SMP100LC-25 and SMP100LC-35 be used interchangeably?

A: No. SMP100LC-25 has 25V off-state voltage and 35V breakover voltage, while SMP100LC-35 has 35V off-state voltage and 55V breakover voltage. Selection depends on the circuit protection threshold requirement. SMP100LC-35 is suitable only for circuits designed for higher voltage operation.

Q: Are all substitute parts RoHS compliant?

A: Yes. P0300SALRP, TISP4040H1BJR-S, SMP100LC-25, and SMP100LC-35 are all ROHS3 compliant. The original P0300SA is RoHS non-compliant.

Q: Do the substitute parts have the same package dimensions?

A: Yes. All substitute parts use DO-214AA (SMB) packaging, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: What is the impact of lower capacitance in substitute parts?

A: The original P0300SA has 140pF capacitance. Substitute parts have lower capacitance: TISP4040H1BJR-S (61pF), SMP100LC-25 (65pF), and SMP100LC-35 (55pF). Lower capacitance may affect high-frequency circuit behavior and should be evaluated in applications with fast transient events or high-frequency noise coupling.