P1102SARP Equivalent & Substitute Parts

Part Overview

The P1102SARP is a TwinChip™ TVS thyristor manufactured by Littelfuse Inc., designed for transient voltage suppression applications. This device features a 90V off-state voltage rating with 150A peak pulse current capability in a DO-214AA (SMB) surface mount package. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

P1102SARP

Littelfuse Inc.In Stock: 1098P1102SARP Datasheet

Current PartRFQ

SMP100LC-90

STMicroelectronicsIn Stock: 1946SMP100LC-90 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P1102SARP is determined by the following critical parameters:

• Voltage Rating Match: Off-state voltage must be 90V to maintain circuit protection thresholds
• Package Compatibility: DO-214AA (SMB) surface mount package required for PCB layout compatibility
• Current Handling: Peak pulse current capability must meet or exceed application requirements
• Breakover Voltage: Must fall within acceptable operating range for the protected circuit
• Element Configuration: Single or multiple element designs acceptable if electrical performance criteria are met

The SMP100LC-90 meets these substitution criteria through matching off-state voltage (90V), identical package format (DO-214AA, SMB), and enhanced current handling capability (400A peak pulse vs. 150A).

Parameter Comparison

Engineering Selection Recommendations

The SMP100LC-90 is the manufacturer-recommended substitute for the obsolete P1102SARP. Selection of this substitute is supported by the following factors:

• Product Availability: The SMP100LC-90 is in active production status, ensuring long-term supply continuity
• Regulatory Compliance: The substitute meets ROHS3 compliance requirements, whereas the original part is non-compliant
• Electrical Performance: Enhanced current ratings (400A vs. 150A peak pulse) provide improved transient suppression capability
• Package Compatibility: Identical DO-214AA (SMB) package enables direct PCB layout compatibility without redesign
• Voltage Matching: 90V off-state voltage rating maintains circuit protection thresholds

Frequently Asked Questions (FAQ)

Q: Can the SMP100LC-90 be used as a direct replacement for the P1102SARP?

A: Yes. Both devices share the same 90V off-state voltage rating and DO-214AA (SMB) package format. The substitute provides enhanced current handling and is in active production.

Q: What is the significance of the different breakover voltages (130V vs. 125V)?

A: The SMP100LC-90 breakover voltage is 5V lower than the P1102SARP. This difference must be evaluated against circuit protection requirements to ensure adequate transient suppression without nuisance triggering.

Q: Why does the SMP100LC-90 have higher capacitance (80pF vs. 35pF)?

A: The increased capacitance is a characteristic of the SMP100LC-90 design. Circuit designers must verify that this parameter does not negatively impact high-frequency performance or signal integrity in the target application.

Q: Does the difference in element count (2 vs. 1) affect substitution?

A: The P1102SARP uses a dual-element configuration while the SMP100LC-90 uses a single element. Both designs meet the 90V off-state voltage and DO-214AA package requirements. Application-specific testing may be warranted to confirm functional equivalence.

Q: Is RoHS compliance a factor in selecting the SMP100LC-90?

A: Yes. The SMP100LC-90 meets ROHS3 compliance standards, whereas the P1102SARP is non-compliant. For applications subject to RoHS regulations, the substitute is the appropriate choice.

Q: What is the impact of the higher hold current (150mA vs. 120mA) in the SMP100LC-90?

A: The 30mA increase in hold current may affect circuit behavior during transient events. Circuit validation is recommended to confirm that the higher hold current does not compromise system performance.