CR1500SC Equivalent & Substitute Parts

Part Overview

The CR1500SC is a Transient Voltage Suppressor (TVS) thyristor manufactured by Littelfuse Inc., designed for overvoltage protection in surface-mount applications. This component features a 140V off-state voltage rating with 250A peak pulse current capability in a DO-214AA (SMB) package. The CR1500SC is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement.

Substiute Parts

CR1500SC

Littelfuse Inc.In Stock: 924CR1500SC Datasheet

Current PartRFQ

P1500SCLRP

Littelfuse Inc.In Stock: 1337P1500SCLRP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CR1500SC is determined by the following critical electrical and mechanical parameters:

• Voltage - Breakover: 180V (fixed threshold)
• Voltage - Off State: 140V (fixed threshold)
• Current - Peak Pulse (8/20µs): minimum 250A required
• Current - Hold (Ih): 150mA (fixed threshold)
• Package / Case: DO-214AA, SMB (mechanical compatibility)
• Mounting Type: Surface Mount (assembly compatibility)

The P1500SCLRP qualifies as a direct substitute because it maintains identical voltage thresholds (180V breakover, 140V off-state), meets or exceeds the peak pulse current requirement (400A vs. 250A), maintains the same hold current (150mA), and uses the identical DO-214AA package with surface-mount compatibility.

Parameter Comparison

Engineering Selection Recommendations

The P1500SCLRP is the qualified substitute for the obsolete CR1500SC based on the following factors:

• Electrical equivalence: Identical voltage thresholds and hold current specifications ensure functional compatibility in existing circuit designs.
• Current capability: The 400A peak pulse rating exceeds the original 250A requirement, providing enhanced transient protection margin.
• Package compatibility: Identical DO-214AA surface-mount package enables direct PCB footprint replacement without layout modification.
• Product status: Active manufacturing status ensures long-term availability and supply chain continuity.
• Compliance: ROHS3 compliance of the P1500SCLRP meets current regulatory requirements, whereas the CR1500SC does not.

Frequently Asked Questions (FAQ)

Q: Can the P1500SCLRP be used as a direct replacement for CR1500SC in existing designs?

A: Yes. The P1500SCLRP maintains identical voltage thresholds (180V breakover, 140V off-state) and hold current (150mA), with superior peak pulse current capability (400A vs. 250A). The identical DO-214AA package permits direct PCB substitution.

Q: What is the difference in on-state voltage between these parts?

A: The CR1500SC specifies 5V on-state voltage, while the P1500SCLRP specifies 4V. This 1V difference is compatible with typical circuit designs and represents improved performance characteristics.

Q: Does the higher capacitance of the P1500SCLRP (95pF vs. 80pF) affect circuit performance?

A: The 15pF difference is minimal and does not introduce compatibility issues in standard TVS thyristor applications. Both values fall within acceptable ranges for transient suppression circuits.

Q: What is the significance of the RoHS compliance difference?

A: The CR1500SC is RoHS non-compliant, while the P1500SCLRP is ROHS3 compliant. For new designs or procurement requiring regulatory compliance, the P1500SCLRP is the appropriate selection.

Q: Are there packaging differences between CR1500SC and P1500SCLRP?

A: Both components use identical DO-214AA (SMB) surface-mount packages. The P1500SCLRP is supplied in Tape & Reel (TR) format, which is standard for high-volume manufacturing and does not affect component functionality or PCB assembly compatibility.