P1302SBLRP Equivalent & Substitute Parts

Part Overview

The P1302SBLRP is a 120V off-state transient voltage suppressor (TVS) thyristor manufactured by Littelfuse Inc., designed for surface mount applications in the DO-214AA (SMB) package. This component operates as a TwinChip™ series device with a peak pulse current rating of 250 A at 8/20µs pulse width. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges for this TVS thyristor category.

Substiute Parts

P1302SBLRP

Littelfuse Inc.In Stock: 800P1302SBLRP Datasheet

Current PartRFQ

SMTPA120

STMicroelectronicsIn Stock: 10386SMTPA120 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P1302SBLRP are identified based on the following critical electrical and mechanical parameters:

• Voltage Rating Match: Off-state voltage of 120V and breakover voltage of 160V must be maintained
• Package Compatibility: DO-214AA (SMB) surface mount package required for mechanical fit
• Current Handling: Peak pulse current capability determines functional equivalence; the SMTPA120 operates at 150 A (8/20µs), which is lower than the primary part's 250 A rating but remains within acceptable substitution criteria for applications with reduced current demands
• Compliance Requirements: RoHS3 compliance and MSL 1 rating must be preserved
• Element Configuration: Number of elements and capacitance values are documented for circuit design consideration

The SMTPA120 from STMicroelectronics meets the voltage and package requirements while providing reduced peak pulse current capability, making it suitable for circuits where the full 250 A rating is not required.

Parameter Comparison

Engineering Selection Recommendations

Both the P1302SBLRP and SMTPA120 maintain identical off-state and breakover voltage specifications, ensuring voltage protection performance equivalence. Both components are RoHS3 compliant with MSL 1 ratings, meeting environmental and reliability standards for industrial and commercial applications.

The primary distinction is peak pulse current capacity. The P1302SBLRP provides 250 A (8/20µs) while the SMTPA120 provides 150 A (8/20µs). Selection between these parts depends on the transient current magnitude expected in the application circuit. The SMTPA120 is suitable for applications where peak transient currents do not exceed 150 A. Both parts are active products with established supply availability.

Frequently Asked Questions (FAQ)

Q: Can the SMTPA120 directly replace the P1302SBLRP in all applications?

A: Direct replacement is possible only in applications where the peak transient current does not exceed 150 A (8/20µs). The voltage protection characteristics remain identical. Circuit analysis must confirm that transient current demands fall within the SMTPA120 specification.

Q: Are the DO-214AA and SMB package designations interchangeable?

A: Yes. DO-214AA and SMB refer to the same surface mount package. Both the P1302SBLRP and SMTPA120 use this identical package, ensuring mechanical and electrical compatibility on the PCB.

Q: What is the significance of the different hold current (Ih) values?

A: The P1302SBLRP specifies 120 mA hold current while the SMTPA120 specifies 150 mA. This parameter defines the minimum current required to maintain thyristor conduction. The higher hold current of the SMTPA120 may affect circuit behavior in low-current transient scenarios; circuit validation is necessary.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the P1302SBLRP and SMTPA120 are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings. Both are classified under ECCN EAR99 and HTSUS 8541.30.0080.

Q: What is the difference in capacitance between these parts?

A: The P1302SBLRP has 35 pF capacitance while the SMTPA120 has 30 pF. This 5 pF difference may affect high-frequency circuit behavior. For applications sensitive to input capacitance, circuit simulation or testing is recommended to confirm performance equivalence.