P0300SC Equivalent & Substitute Parts

Part Overview

The P0300SC is a 25V off-state, 400A 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, which necessitates identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical performance within the specified parameter ranges while offering improved availability and compliance status.

Substiute Parts

P0300SC

Littelfuse Inc.In Stock: 10357P0300SC Datasheet

Current PartRFQ

P0300SCLRP

Littelfuse Inc.In Stock: 19844P0300SCLRP Datasheet

DirectRFQ

SMP100LC-25

STMicroelectronicsIn Stock: 17976SMP100LC-25 Datasheet

MFR RecommendedRFQ

SMP100LC-35

STMicroelectronicsIn Stock: 45354SMP100LC-35 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for TVS thyristors is determined by matching the following critical parameters:

• Voltage - Off State: Must be 25V to maintain circuit protection threshold
• Current - Peak Pulse (8/20µs): Must be 400A to handle transient energy
• Package / Case: Must be DO-214AA (SMB) for PCB compatibility
• Mounting Type: Must be Surface Mount
• Number of Elements: Must be 1

The P0300SC has two qualified substitutes:

1. P0300SCLRP (Littelfuse Inc.): Direct manufacturer equivalent with identical electrical specifications, differentiated by tape & reel packaging and active product status.

2. SMP100LC-25 (STMicroelectronics): Cross-manufacturer substitute with matching 25V off-state voltage and 400A peak pulse current, from the SMP TRISIL™ series.

3. SMP100LC-35 (STMicroelectronics): Higher voltage variant (35V off-state) suitable for applications requiring increased voltage margin, with identical 400A peak pulse current rating.

Parameter Comparison

Engineering Selection Recommendations

P0300SCLRP is the primary substitute for direct replacement. It maintains identical electrical specifications to the P0300SC while offering active product status and ROHS3 compliance. The only differences are packaging format (tape & reel versus bulk) and minor variations in on-state voltage (4V versus 5V) and capacitance (250pF versus 110pF), which do not affect functional equivalence in standard TVS applications.

SMP100LC-25 (STMicroelectronics) provides an alternative from a different manufacturer with matching 25V off-state and 400A peak pulse ratings. This substitute is suitable for applications where cross-manufacturer qualification is acceptable. The higher hold current (150mA versus 50mA) and lower capacitance (65pF versus 110pF) should be evaluated against specific circuit requirements.

SMP100LC-35 is applicable only for circuits designed to operate at 35V off-state voltage. This higher voltage variant is not a direct substitute for the P0300SC but may be considered for new designs requiring increased transient voltage protection margin. The 55V breakover voltage represents a significant shift in protection threshold and requires circuit re-evaluation.

All substitute parts maintain the DO-214AA (SMB) package format, surface mount configuration, and unlimited moisture sensitivity rating, ensuring PCB compatibility and assembly process compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can P0300SCLRP be used as a direct replacement for P0300SC?

A: Yes. P0300SCLRP is electrically equivalent to P0300SC with identical voltage and current ratings. The primary difference is product status (active versus obsolete) and packaging format (tape & reel). Both components are suitable for the same circuit applications.

Q: What is the difference between SMP100LC-25 and SMP100LC-35?

A: The primary difference is the off-state voltage rating: SMP100LC-25 is rated at 25V, while SMP100LC-35 is rated at 35V. Both maintain 400A peak pulse current. SMP100LC-35 provides higher voltage protection margin but requires circuit verification before substitution.

Q: Are the STMicroelectronics SMP100LC series parts compatible with the P0300SC footprint?

A: Yes. Both SMP100LC-25 and SMP100LC-35 use the DO-214AA (SMB) package, which is mechanically and electrically compatible with P0300SC PCB layouts.

Q: Does the higher hold current (Ih) of SMP100LC series affect compatibility?

A: The SMP100LC series specifies 150mA hold current compared to 50mA for P0300SC. This parameter affects the minimum current required to maintain the thyristor in the on-state. Circuit-level evaluation is necessary to confirm compatibility with specific load conditions.

Q: What is the impact of capacitance differences between substitute parts?

A: Capacitance variations (P0300SC: 110pF, P0300SCLRP: 250pF, SMP100LC-25: 65pF, SMP100LC-35: 55pF) may affect high-frequency transient response. For applications with strict frequency-dependent performance requirements, capacitance specifications should be verified against circuit design parameters.

Q: Are all substitute parts RoHS compliant?

A: P0300SCLRP, SMP100LC-25, and SMP100LC-35 are all ROHS3 compliant. The original P0300SC is RoHS non-compliant. Compliance status should be confirmed for applications subject to RoHS regulations.

Q: What packaging options are available for these TVS thyristors?

A: P0300SCLRP is supplied in tape & reel (TR) format. SMP100LC-25 and SMP100LC-35 are supplied in cut tape (CT) and Digi-Reel® formats. Packaging selection depends on assembly process requirements and order quantities.