P3100SD Equivalent & Substitute Parts

Part Overview

The P3100SD is a 275V off-state, 1 kA peak pulse (8/20µs) TVS thyristor manufactured by Littelfuse in the DO-214AA (SMB) surface mount package. This component is classified as obsolete, which necessitates identification of active equivalent alternatives for ongoing design and procurement requirements. The SIDACtor® series thyristor provides transient voltage suppression functionality across the specified electrical parameters.

Substiute Parts

P3100SD

LittelfuseIn Stock: 1011P3100SD Datasheet

Current PartRFQ

P3100SDLRP

Littelfuse Inc.In Stock: 4661P3100SDLRP Datasheet

DirectRFQ

P3100SALRP

Littelfuse Inc.In Stock: 35476P3100SALRP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P3100SD is determined by equivalence across the following critical parameters: breakover voltage (350V), off-state voltage (275V), on-state voltage (4V), package type (DO-214AA, SMB), and mounting configuration (surface mount). The substitute parts are grouped into two categories based on current handling specifications:

Direct Equivalent (P3100SDLRP): Maintains identical electrical specifications including 1 kA peak pulse current (8/20µs) and 200 A peak pulse current (10/1000µs). Differs only in packaging format (Tape & Reel vs. standard packaging) and product status (Active vs. Obsolete).

Manufacturer-Recommended Alternative (P3100SALRP): Maintains voltage specifications and package type but operates at reduced current ratings: 150 A peak pulse (8/20µs) and 45 A peak pulse (10/1000µs). This part is suitable for applications where peak pulse current requirements do not exceed these lower thresholds.

Parameter Comparison

Engineering Selection Recommendations

P3100SDLRP is the direct functional equivalent for applications requiring the full 1 kA peak pulse current specification. This part maintains all electrical parameters of the P3100SD while offering active product status and ROHS3 compliance. Selection of P3100SDLRP is appropriate for designs where current handling capacity is a critical requirement and regulatory compliance is necessary.

P3100SALRP is suitable for applications where peak pulse current requirements do not exceed 150 A (8/20µs) or 45 A (10/1000µs). This part offers active status and ROHS3 compliance but operates at reduced current ratings and exhibits different capacitance (35pF vs. 70pF) and hold current (150 mA vs. 50 mA) characteristics. Selection requires verification that application transient current levels remain within the specified lower thresholds.

Both substitute parts are manufactured by Littelfuse Inc., maintain the DO-214AA package configuration, and are classified as active products with current inventory availability.

Frequently Asked Questions (FAQ)

Q: Can P3100SDLRP be used as a direct replacement for P3100SD?

A: Yes. P3100SDLRP maintains identical electrical specifications (350V breakover, 275V off-state, 1 kA peak pulse current at 8/20µs, 200 A peak pulse current at 10/1000µs) and package configuration (DO-214AA, SMB surface mount). The primary difference is packaging format (Tape & Reel) and active product status.

Q: What are the limitations of P3100SALRP as a substitute?

A: P3100SALRP operates at reduced peak pulse current ratings: 150 A (8/20µs) versus 1 kA for the P3100SD, and 45 A (10/1000µs) versus 200 A. Capacitance is also reduced to 35pF from 70pF, and hold current increases to 150 mA from 50 mA. This part is suitable only for applications where transient current levels remain within these lower specifications.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both P3100SDLRP and P3100SALRP are ROHS3 compliant, whereas the original P3100SD is RoHS non-compliant. This compliance status may be a requirement for new designs or procurement in regulated markets.

Q: Do the substitute parts use the same package and mounting configuration?

A: Yes. All three parts (P3100SD, P3100SDLRP, and P3100SALRP) use the DO-214AA (SMB) package with surface mount configuration, ensuring mechanical and footprint compatibility on PCB assemblies.

Q: What is the difference between P3100SDLRP and P3100SALRP packaging?

A: P3100SDLRP is supplied in Tape & Reel (TR) format, while P3100SALRP is supplied in Cut Tape (CT) and Digi-Reel® format. Both are standard automated assembly packaging options with no impact on component electrical performance.