CR0720SC Equivalent & Substitute Parts

Part Overview

The CR0720SC is a Transient Voltage Suppressor (TVS) thyristor manufactured by Littelfuse Inc., designed for transient overvoltage protection in surface-mount applications. This device operates at 65V off-state voltage with a peak pulse current rating of 250A (8/20µs). The part is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

CR0720SC

Littelfuse Inc.In Stock: 1086CR0720SC Datasheet

Current PartRFQ

P0720SCLRP

Littelfuse Inc.In Stock: 145226P0720SCLRP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CR0720SC is determined by strict equivalence across the following critical parameters:

• Voltage - Breakover: 88V
• Voltage - Off State: 65V
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Number of Elements: 1
• Current - Hold (Ih): 150 mA

The substitute part P0720SCLRP maintains identical voltage ratings, breakover characteristics, and mechanical compatibility. While the peak pulse current (8/20µs) is rated higher at 400A compared to the original 250A, this represents an enhanced capability within the same voltage class and package footprint. The hold current remains constant at 150 mA, ensuring consistent thyristor triggering behavior.

Parameter Comparison

Engineering Selection Recommendations

The P0720SCLRP is the direct substitute for the obsolete CR0720SC. Both devices share identical voltage ratings (88V breakover, 65V off-state) and mechanical compatibility (DO-214AA, SMB package). The substitute offers the following advantages:

• Active product status ensures long-term availability and supply chain continuity
• ROHS3 compliance meets current environmental and regulatory requirements
• Higher peak pulse current rating (400A vs. 250A at 8/20µs) provides enhanced transient protection margin
• Identical hold current (150 mA) maintains circuit triggering characteristics
• Same package and mounting type eliminate PCB redesign requirements

The P0720SCLRP is suitable for direct replacement in applications currently using the CR0720SC, with no circuit modifications required.

Frequently Asked Questions (FAQ)

Q: Can P0720SCLRP replace CR0720SC in existing designs?

A: Yes. Both devices share identical voltage ratings, hold current, and package specifications. Direct substitution is possible without circuit modifications.

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

A: The CR0720SC is rated at 250A (8/20µs), while the P0720SCLRP is rated at 400A (8/20µs). The substitute provides higher transient current handling capability within the same voltage class.

Q: Are there packaging differences?

A: No. Both parts use the DO-214AA, SMB surface-mount package with identical mechanical footprints.

Q: Why is RoHS compliance important for this substitution?

A: The CR0720SC is RoHS non-compliant, while P0720SCLRP is ROHS3 compliant. For new designs and systems subject to environmental regulations, the compliant substitute is required.

Q: Is the on-state voltage difference significant?

A: The CR0720SC has an on-state voltage of 5V, while P0720SCLRP is rated at 4V. This 1V difference is within typical thyristor operating margins and does not affect substitution suitability.

Q: What is the capacitance difference?

A: The CR0720SC has 120pF capacitance, while P0720SCLRP has 150pF. Both values are within the same order of magnitude and do not impact functional compatibility for transient suppression applications.