P0721SCRP Equivalent & Substitute Parts

Part Overview

The P0721SCRP is a Transient Voltage Suppressor (TVS) device manufactured by Littelfuse Inc., designed for SLIC applications in mixed technology configuration. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations. The DO-214AA (SMB) package format and 88V clamping voltage specification define the functional requirements for equivalent alternatives.

Substiute Parts

P0721SCRP

Littelfuse Inc.In Stock: 3734P0721SCRP Datasheet

Current PartRFQ

SMP100LC-65

STMicroelectronicsIn Stock: 55194SMP100LC-65 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P0721SCRP is determined by the following critical parameters:

• Package Compatibility: DO-214AA (SMB) surface mount package is mandatory for direct board-level replacement
• Voltage Rating: Clamping or breakover voltage must align with the 88V specification to maintain circuit protection integrity
• Number of Circuits: Single-circuit configuration required
• Mounting Type: Surface mount technology for compatibility with existing PCB layouts
• Application Class: TVS device classification for transient voltage suppression

The SMP100LC-65 qualifies as a substitute based on matching package format (DO-214AA, SMB), single-element configuration, and surface mount compatibility. The voltage parameters (85V breakover, 65V off-state) fall within the operational envelope for SLIC circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

The SMP100LC-65 is the designated substitute for the obsolete P0721SCRP based on the following factors:

• Product Status Alignment: The SMP100LC-65 maintains active production status, ensuring long-term availability and supply chain continuity
• Package Equivalence: Both devices utilize the DO-214AA (SMB) package, enabling direct PCB footprint compatibility without layout modifications
• Regulatory Compliance: The SMP100LC-65 achieves ROHS3 compliance, meeting current environmental and regulatory standards, whereas the P0721SCRP is RoHS non-compliant
• Voltage Specification: The 85V breakover voltage of the SMP100LC-65 provides functional equivalence within the 88V clamping specification of the original part
• Electrical Characteristics: Single-element configuration and identical MSL rating (1 - Unlimited) ensure consistent handling and storage requirements

Selection of the SMP100LC-65 is appropriate for applications requiring SLIC circuit protection with modern compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can the SMP100LC-65 be used as a direct replacement for the P0721SCRP without PCB modifications?

A: Yes. Both devices share the DO-214AA (SMB) package format and identical pin configuration, allowing direct substitution without PCB layout changes.

Q: What is the significance of the voltage difference between the P0721SCRP (88V clamping) and SMP100LC-65 (85V breakover)?

A: The 85V breakover voltage of the SMP100LC-65 operates within the functional envelope of the original 88V specification. The 65V off-state voltage provides the suppression threshold for transient events in SLIC applications.

Q: Are there any compliance considerations when transitioning from P0721SCRP to SMP100LC-65?

A: The SMP100LC-65 is ROHS3 compliant, whereas the P0721SCRP is RoHS non-compliant. This represents an improvement in regulatory alignment for new designs and systems subject to environmental compliance requirements.

Q: Do both parts have the same moisture sensitivity requirements?

A: Yes. Both the P0721SCRP and SMP100LC-65 are rated MSL 1 (Unlimited), indicating no moisture sensitivity limitations and identical handling protocols.

Q: Is the SMP100LC-65 suitable for existing inventory of P0721SCRP applications?

A: The SMP100LC-65 is suitable for applications where the original P0721SCRP was specified, provided the voltage and current characteristics align with circuit protection requirements. The active production status of the SMP100LC-65 ensures availability for both replacement and new production scenarios.