P1200SCLRP Equivalent & Substitute Parts

Part Overview

The P1200SCLRP is a Transient Voltage Suppressor (TVS) thyristor manufactured by Littelfuse Inc., part of the SIDACtor® series. This surface-mount component operates at 100V off-state voltage with a peak pulse current rating of 400A (8/20µs). The device is actively produced and widely used in transient protection applications requiring high current suppression in compact form factors.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges for this product category.

Substiute Parts

P1200SCLRP

Littelfuse Inc.In Stock: 10316P1200SCLRP Datasheet

Current PartRFQ

SMTPA100

STMicroelectronicsIn Stock: 2380SMTPA100 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Voltage Rating (Off-State & Breakover): Must match or remain within acceptable tolerance to ensure proper trigger voltage and protection threshold
• Current Handling (Peak Pulse 8/20µs): Determines suppression capability; substitute must meet or exceed application requirements
• Package / Case (DO-214AA, SMB): Physical and electrical compatibility with PCB layout and thermal management
• Capacitance: Affects circuit performance in high-frequency applications
• Hold Current (Ih): Determines latching behavior and circuit stability

The SMTPA100 from STMicroelectronics meets the voltage and package requirements but operates at a reduced peak pulse current rating of 150A (8/20µs) compared to the P1200SCLRP's 400A specification. This substitution is valid only for applications where the lower current rating is acceptable.

Parameter Comparison

Engineering Selection Recommendations

Both the P1200SCLRP and SMTPA100 are active products with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and use.

The P1200SCLRP is the primary choice for applications requiring the full 400A peak pulse current specification. The SMTPA100 serves as a substitute only in designs where peak pulse current requirements do not exceed 150A and where the slightly higher breakover voltage (133V vs. 130V) is acceptable. Both devices share identical package geometry, capacitance, and mounting characteristics, enabling direct PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can SMTPA100 directly replace P1200SCLRP in all applications?

A: No. The SMTPA100 has a reduced peak pulse current rating of 150A compared to P1200SCLRP's 400A. Substitution is valid only when application requirements do not exceed 150A peak pulse current.

Q: Are the package dimensions identical between these parts?

A: Yes. Both devices use the DO-214AA (SMB) package, ensuring identical PCB footprint and mounting compatibility.

Q: What is the significance of the breakover voltage difference (130V vs. 133V)?

A: The 3V difference falls within typical manufacturing tolerance for TVS thyristors. Both devices trigger protection at approximately 100V off-state voltage, with breakover occurring in the 130–133V range. This difference is not significant for most circuit applications.

Q: How does the hold current difference affect circuit performance?

A: The SMTPA100 has a higher hold current (150mA vs. 120mA). This affects latching behavior and may impact circuit stability in designs with limited holding current availability. Verify circuit design compatibility before substitution.

Q: Are both parts available in the same packaging formats?

A: P1200SCLRP is supplied in Tape & Reel (TR) format. SMTPA100 is available in Cut Tape (CT) and Digi-Reel® formats. Confirm packaging availability with your supplier for production requirements.