P1200SALRP Equivalent & Substitute Parts

Part Overview

The P1200SALRP is a 100V off-state transient voltage suppressor (TVS) thyristor manufactured by Littelfuse Inc. in the SIDACtor® series. This surface-mount component in DO-214AA (SMB) packaging is designed for transient overvoltage protection applications requiring 150 A peak pulse current capability. The part maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, design flexibility, or manufacturing preferences.

Substiute Parts

P1200SALRP

Littelfuse Inc.In Stock: 7925P1200SALRP Datasheet

Current PartRFQ

SMTPA100

STMicroelectronicsIn Stock: 2380SMTPA100 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P1200SALRP is determined by the following critical parameters:

• Off-State Voltage: 100V (exact match required)
• Peak Pulse Current (8/20µs): 150A (exact match required)
• Package / Case: DO-214AA, SMB (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Regulatory Compliance: RoHS3 Compliant (minimum requirement)

The SMTPA100 from STMicroelectronics meets all substitution criteria. Variations in breakover voltage (130V vs. 133V), on-state voltage, hold current, capacitance, and peak pulse current at different pulse widths (10/1000µs) fall within acceptable engineering tolerances for TVS thyristor applications and do not preclude functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Both the P1200SALRP and SMTPA100 maintain active product status and satisfy RoHS3 and REACH compliance requirements. Selection between these parts should be based on:

• Availability: P1200SALRP has 7900 units in stock; SMTPA100 has 2300 units in stock
• Packaging Options: SMTPA100 is available in both Cut Tape (CT) and Digi-Reel® formats, providing additional supply chain flexibility
• Manufacturer Preference: Design specifications may mandate a particular manufacturer series (SIDACtor® vs. TRISIL™)

Both parts are suitable for direct substitution in 100V, 150A TVS thyristor applications with DO-214AA surface-mount packaging.

Frequently Asked Questions (FAQ)

Q: Can SMTPA100 replace P1200SALRP in my circuit? A: Yes. Both parts share identical off-state voltage (100V), peak pulse current (150A at 8/20µs), and DO-214AA SMB package specifications. Breakover voltage tolerance (130V vs. 133V) is within acceptable engineering margins for TVS thyristor applications.

Q: What is the difference in capacitance between these parts? A: P1200SALRP has 45pF capacitance; SMTPA100 has 35pF. This 10pF difference may affect high-frequency circuit behavior. Verify capacitance requirements in your specific application before substitution.

Q: Are there packaging differences? A: Both parts use DO-214AA (SMB) surface-mount packaging. SMTPA100 offers additional supply flexibility through Digi-Reel® packaging in addition to standard Cut Tape.

Q: Do both parts meet compliance requirements? A: Yes. Both P1200SALRP and SMTPA100 are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings.

Q: What is the hold current difference? A: P1200SALRP specifies 120mA hold current; SMTPA100 specifies 150mA. This 30mA difference may affect circuit latching behavior in specific applications. Evaluate hold current requirements for your protection circuit design.