P3100SCMC Equivalent & Substitute Parts

Part Overview

The P3100SCMC is a 275V 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 equivalent and substitute parts for ongoing design support and procurement continuity. Active alternatives with comparable electrical characteristics and identical packaging are available from both the original manufacturer and qualified cross-reference suppliers.

Substiute Parts

P3100SCMC

Littelfuse Inc.In Stock: 1013P3100SCMC Datasheet

Current PartRFQ

P3100SCMCLRP

Littelfuse Inc.In Stock: 8257P3100SCMCLRP Datasheet

DirectRFQ

SMP100MC-270

STMicroelectronicsIn Stock: 15529SMP100MC-270 Datasheet

MFR RecommendedRFQ

TISP4350T3BJR-S

Bourns Inc.In Stock: 6161TISP4350T3BJR-S Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for TVS thyristors is determined by electrical parameter compatibility within defined tolerance bands and identical or functionally equivalent packaging. The following criteria establish valid substitution:

Primary Substitution Criteria:

• Voltage - Off State: Must match the main part specification (275V)
• Voltage - Breakover: Must match the main part specification (350V)
• Current - Peak Pulse (8/20µs): Must meet or exceed the main part requirement (400A minimum)
• Current - Hold (Ih): Must match the main part specification (150 mA)
• Package / Case: Must be DO-214AA (SMB) surface mount
• Number of Elements: Must be 1

Secondary Compatibility Factors:

• Voltage - On State: Minor variations acceptable within typical device operation
• Capacitance: Variations within ±15% acceptable for most applications
• Moisture Sensitivity Level: MSL 1 (Unlimited) required

The P3100SCMC has two qualified substitutes: P3100SCMCLRP (direct Littelfuse equivalent) and two cross-manufacturer alternatives with parameter deviations noted below.

Parameter Comparison

Engineering Selection Recommendations

P3100SCMCLRP (Littelfuse Inc.) is the primary direct equivalent. This part maintains identical electrical specifications to the obsolete P3100SCMC while offering active product status and ROHS3 compliance. Packaging is tape and reel (TR), suitable for automated assembly. This substitute requires no circuit redesign and provides the highest compatibility assurance.

SMP100MC-270 (STMicroelectronics) is a qualified cross-manufacturer alternative with the following parameter deviations: off-state voltage is 270V (5V lower than specification), breakover voltage is 335V (15V lower), and peak pulse current (8/20µs) is 300A (100A lower than the main part). This part is ROHS3 compliant and REACH unaffected. Selection of this substitute is contingent upon circuit tolerance for reduced current handling capacity.

TISP4350T3BJR-S (Bourns Inc.) maintains matching off-state voltage (275V) and breakover voltage (350V) specifications. Peak pulse current (8/20µs) is 250A (150A lower than the main part), and peak pulse current (10/1000µs) is 80A (20A lower). On-state voltage is 3V versus 5V. Capacitance is 52pF (7pF higher). This part is ROHS3 compliant with REACH affected status. Selection requires verification that reduced current ratings are acceptable for the application.

All three substitutes share identical package specifications (DO-214AA, SMB) and mounting type (surface mount), ensuring PCB layout compatibility without modification.

Frequently Asked Questions (FAQ)

Q: Can P3100SCMCLRP be used as a direct replacement for P3100SCMC?

A: Yes. P3100SCMCLRP is the direct Littelfuse equivalent with identical electrical specifications (275V off-state, 350V breakover, 400A peak pulse current, 150 mA hold current) and identical packaging (DO-214AA, SMB). The primary difference is product status (active versus obsolete) and packaging format (tape and reel versus bulk). No circuit modifications are required.

Q: What are the limitations of using SMP100MC-270 as a substitute?

A: SMP100MC-270 has three parameter deviations: off-state voltage is 270V (5V lower), breakover voltage is 335V (15V lower), and peak pulse current (8/20µs) is 300A (100A lower than P3100SCMC). These deviations may affect circuit performance in applications requiring the full 400A current rating or precise voltage thresholds. Compatibility must be verified against circuit requirements.

Q: What are the limitations of using TISP4350T3BJR-S as a substitute?

A: TISP4350T3BJR-S has reduced current ratings: peak pulse current (8/20µs) is 250A (150A lower) and peak pulse current (10/1000µs) is 80A (20A lower). On-state voltage is 3V versus 5V, and capacitance is 52pF versus 45pF. Applications requiring the full 400A current capacity cannot use this substitute without circuit redesign. REACH affected status may require additional compliance documentation.

Q: Are all substitutes compatible with the same PCB layout?

A: Yes. All three substitutes use identical packaging (DO-214AA, SMB) and surface mount mounting type. PCB footprints and assembly processes require no modification. Solder reflow profiles and handling procedures remain unchanged.

Q: Which substitute offers the best compliance profile?

A: P3100SCMCLRP and SMP100MC-270 both offer ROHS3 compliance and REACH unaffected status. TISP4350T3BJR-S is ROHS3 compliant but REACH affected. For applications with strict regulatory requirements, P3100SCMCLRP is the preferred choice due to identical specifications and unrestricted compliance status.

Q: Can multiple substitutes be used interchangeably in the same design?

A: No. Each substitute has distinct electrical characteristics. Once a substitute is selected and validated for a specific circuit, that part number must be maintained. Switching between substitutes requires re-evaluation of circuit performance and compliance documentation.