P1500SCRP Equivalent & Substitute Parts

Part Overview

The P1500SCRP is a 140V off-state, 400A peak pulse TVS thyristor manufactured by Littelfuse Inc. in the SIDACtor® series, housed in a DO-214AA (SMB) surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part delivers transient voltage suppression with a 180V breakover voltage and 4V on-state voltage, suitable for protecting sensitive circuits from overvoltage transients.

Substiute Parts

P1500SCRP

Littelfuse Inc.In Stock: 9089P1500SCRP Datasheet

Current PartRFQ

P1500SCLRP

Littelfuse Inc.In Stock: 1337P1500SCLRP Datasheet

DirectRFQ

SMP100LC-140

STMicroelectronicsIn Stock: 4249SMP100LC-140 Datasheet

MFR RecommendedRFQ

SMP100MC-140

STMicroelectronicsIn Stock: 2372SMP100MC-140 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P1500SCRP is determined by the following critical parameters:

• Voltage - Off State: Must be 140V (exact match required)
• Voltage - Breakover: Acceptable range 175V–180V
• Current - Peak Pulse (8/20µs): Minimum 300A (original part rated 400A)
• Current - Hold (Ih): Must be 150mA (exact match required)
• Package / Case: Must be DO-214AA, SMB (surface mount compatibility)
• Mounting Type: Surface Mount (PCB footprint compatibility)
• Number of Elements: Must be 1 (single element configuration)

Substitute parts are grouped into two categories:

Direct Substitutes (Identical Electrical Performance):

• P1500SCLRP (Littelfuse Inc.) – Identical specifications, active product status, RoHS3 compliant, tape & reel packaging

Functional Equivalents (Acceptable Performance Variation):

• SMP100LC-140 (STMicroelectronics) – Meets all critical parameters; breakover voltage 175V (within tolerance), capacitance 65pF (lower than original)
• SMP100MC-140 (STMicroelectronics) – Meets all critical parameters; peak pulse current 300A (lower than original 400A), breakover voltage 175V, capacitance 60pF

Parameter Comparison

Engineering Selection Recommendations

P1500SCLRP is the primary substitute for P1500SCRP. It maintains identical electrical specifications, active product status, and RoHS3 compliance. The transition from bulk to tape & reel packaging aligns with modern manufacturing standards.

SMP100LC-140 (STMicroelectronics) is a functional equivalent suitable for applications where the 5V reduction in breakover voltage (175V vs. 180V) and 30pF reduction in capacitance are acceptable. Peak pulse current rating remains at 400A, matching the original specification.

SMP100MC-140 (STMicroelectronics) is applicable only in designs where peak pulse current requirements do not exceed 300A. The 100A reduction from the original 400A specification represents a material performance difference and requires circuit-level validation.

All substitute parts are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements that the obsolete P1500SCRP does not satisfy.

Frequently Asked Questions (FAQ)

Q: Can P1500SCLRP directly replace P1500SCRP without circuit modification?

A: Yes. P1500SCLRP is electrically and mechanically identical to P1500SCRP. The only difference is packaging format (tape & reel vs. bulk) and active product status. No circuit modification is required.

Q: What is the key difference between SMP100LC-140 and SMP100MC-140?

A: SMP100LC-140 maintains the 400A peak pulse current rating of the original P1500SCRP. SMP100MC-140 has a reduced peak pulse current rating of 300A. Selection depends on circuit transient current requirements.

Q: Are the STMicroelectronics parts (SMP100LC-140, SMP100MC-140) pin-compatible with P1500SCRP?

A: Yes. Both parts use the DO-214AA (SMB) package with identical pinout and footprint. Surface mount placement and reflow parameters remain unchanged.

Q: Why does capacitance differ between substitute parts?

A: Capacitance variation (95pF, 65pF, 60pF) reflects different semiconductor die designs across manufacturers. For transient suppression applications, this parameter affects high-frequency response but does not impact the core voltage clamping function at the specified current levels.

Q: Which substitute part should be selected for new designs?

A: P1500SCLRP is recommended for direct replacement scenarios. For new designs, evaluate SMP100LC-140 or SMP100MC-140 based on peak pulse current requirements and supply chain availability. All three active parts are RoHS3 compliant.

Q: Is the 5V difference in breakover voltage (180V vs. 175V) significant?

A: The 5V difference represents 2.8% variation from the original specification. Circuit-level analysis is required to determine if this variation affects protection thresholds in the target application.