CR0640SA Equivalent & Substitute Parts

Part Overview

The CR0640SA is a 58V off-state thyristor-based transient voltage suppressor (TVS) in DO-214AA surface mount packaging, manufactured by Littelfuse Inc. This component is designed for transient overvoltage protection in electronic circuits with a peak pulse current rating of 37A (10/1000µs). The CR0640SA is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Substiute Parts

CR0640SA

Littelfuse Inc.In Stock: 1032CR0640SA Datasheet

Current PartRFQ

P0640SALRP

Littelfuse Inc.In Stock: 2196P0640SALRP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The P0640SALRP qualifies as a direct substitute for the CR0640SA based on the following critical electrical and mechanical parameters:

Matching Parameters:

• Voltage - Off State: 58V (identical)
• Voltage - Breakover: 77V (identical)
• Current - Hold (Ih): 150mA (identical)
• Package / Case: DO-214AA, SMB (identical)
• Mounting Type: Surface Mount (identical)
• Capacitance: 60pF (identical)
• Number of Elements: 1 (identical)

Enhanced Performance:

• Current - Peak Pulse (10/1000µs): 45A (exceeds CR0640SA requirement of 37A)
• Voltage - On State: 4V (improved from 5V)

The P0640SALRP maintains all critical electrical specifications while providing higher peak pulse current capability, making it a direct functional replacement.

Parameter Comparison

Engineering Selection Recommendations

The P0640SALRP is the direct equivalent for CR0640SA replacement. Selection should be based on the following factors:

Product Status: The CR0640SA is obsolete, while P0640SALRP is active and in production. For new designs or ongoing procurement, P0640SALRP is the appropriate choice.

Compliance: P0640SALRP is ROHS3 compliant and REACH unaffected, whereas CR0640SA is RoHS non-compliant. Applications requiring regulatory compliance mandate the use of P0640SALRP.

Performance: P0640SALRP provides enhanced peak pulse current capability (45A vs. 37A at 10/1000µs) and improved on-state voltage (4V vs. 5V), making it suitable for applications with higher transient energy requirements.

Packaging: Both components use identical DO-214AA surface mount packaging, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can P0640SALRP be used as a direct replacement for CR0640SA in existing designs?

A: Yes. P0640SALRP is electrically and mechanically compatible with CR0640SA. All critical parameters—off-state voltage, breakover voltage, hold current, and package type—are identical. The higher peak pulse current rating of P0640SALRP provides additional design margin.

Q: What is the difference in peak pulse current between these parts?

A: CR0640SA is rated for 37A peak pulse current (10/1000µs), while P0640SALRP is rated for 45A. This difference reflects improved transient handling capability in the newer part. Both are suitable for applications designed around the CR0640SA specification.

Q: Are there packaging differences between CR0640SA and P0640SALRP?

A: No. Both components use DO-214AA (SMB) surface mount packaging. PCB footprints and assembly processes are identical.

Q: Why is CR0640SA obsolete?

A: CR0640SA has been discontinued by Littelfuse Inc. P0640SALRP represents the current production equivalent within the SIDACtor® thyristor product line.

Q: Does P0640SALRP meet RoHS requirements?

A: Yes. P0640SALRP is ROHS3 compliant, whereas CR0640SA is RoHS non-compliant. Applications subject to RoHS regulations require P0640SALRP.

Q: What is the moisture sensitivity level for these components?

A: Both CR0640SA and P0640SALRP have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.