P1502SALRP Equivalent & Substitute Parts

Part Overview

The P1502SALRP is a Transient Voltage Suppressor (TVS) thyristor manufactured by Littelfuse Inc., designed for overvoltage protection in surface mount applications. This component operates at 140V off-state voltage with a peak pulse current rating of 150A (8/20µs). The device is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts may be required due to inventory constraints, application-specific current requirements, or design optimization needs while maintaining equivalent voltage protection characteristics.

Substiute Parts

P1502SALRP

Littelfuse Inc.In Stock: 944P1502SALRP Datasheet

Current PartRFQ

SMP100LC-140

STMicroelectronicsIn Stock: 4249SMP100LC-140 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P1502SALRP is determined by the following critical parameters that must remain equivalent or superior:

Mandatory Equivalence Parameters:

• Voltage - Off State: 140V (exact match required)
• Voltage - Breakover: within acceptable tolerance range
• Package / Case: DO-214AA, SMB (physical and electrical compatibility)
• RoHS3 Compliance: required for regulatory alignment
• Moisture Sensitivity Level: MSL 1 (Unlimited)

Performance Flexibility Parameters:

• Current - Peak Pulse (8/20µs): may exceed 150A for higher surge capacity
• Current - Peak Pulse (10/1000µs): may exceed 45A for extended pulse handling
• Current - Hold (Ih): may exceed 120mA for improved holding characteristics
• Capacitance: may vary within application tolerance

The substitute part SMP100LC-140 meets all mandatory equivalence criteria while providing enhanced current handling capabilities, making it suitable for applications requiring higher transient energy dissipation.

Parameter Comparison

Engineering Selection Recommendations

Both the P1502SALRP and SMP100LC-140 are Active product status components with full RoHS3 compliance and REACH unaffected status, meeting current regulatory requirements for industrial and commercial applications.

The P1502SALRP features a dual-element configuration (2 elements) with lower capacitance (30pF), suitable for applications where minimal parasitic capacitance is critical or where dual-channel protection is required.

The SMP100LC-140 provides a single-element design with significantly higher current handling capacity (400A peak pulse vs. 150A) and enhanced holding current (150mA vs. 120mA), making it appropriate for applications requiring greater transient energy absorption or where higher surge events are anticipated. The increased capacitance (65pF) must be evaluated against circuit timing requirements.

Selection between these parts should be based on specific application requirements regarding element count, capacitance tolerance, and peak current handling needs, with both options providing equivalent voltage protection at 140V off-state operation.

Frequently Asked Questions (FAQ)

Q: Can SMP100LC-140 directly replace P1502SALRP in all applications?

A: Direct replacement is possible for voltage protection function, as both devices maintain 140V off-state voltage and compatible DO-214AA, SMB packaging. However, the single-element design and higher capacitance of SMP100LC-140 require verification against circuit-specific timing and channel requirements.

Q: What is the significance of the different element count (2 vs. 1)?

A: The P1502SALRP dual-element configuration provides two independent protection channels within a single package, while SMP100LC-140 provides single-channel protection. Application architecture must determine whether dual or single channel protection is required.

Q: How does the capacitance difference affect circuit performance?

A: The P1502SALRP operates at 30pF while SMP100LC-140 operates at 65pF. Higher capacitance may impact high-frequency circuit behavior and signal integrity. Circuit simulation or testing is necessary to confirm compatibility with specific frequency requirements.

Q: Are both parts suitable for the same environmental conditions?

A: Yes. Both components carry MSL 1 (Unlimited) moisture sensitivity rating and RoHS3 compliance, indicating equivalent environmental performance across standard industrial and commercial operating conditions.

Q: What is the practical difference in current handling between these parts?

A: The SMP100LC-140 handles 400A peak pulse (8/20µs) compared to P1502SALRP at 150A, representing a 2.67x increase in transient current capacity. This enhanced capability accommodates higher-energy surge events without component degradation.

Q: Do packaging differences exist between these parts?

A: Both parts use DO-214AA, SMB surface mount packaging with identical footprints and land patterns, enabling direct PCB layout compatibility.