SP721AP Equivalent & Substitute Parts

Part Overview

The SP721AP is a Transient Voltage Suppressors (TVS) device manufactured by Littelfuse Inc., designed for circuit protection applications. This mixed-technology TVS device features 6 circuits in an 8-DIP through-hole package and is classified as obsolete. Due to its obsolete status, identifying equivalent and substitute parts is essential for ongoing system maintenance, repairs, and new designs requiring compatible protection solutions.

Substiute Parts

SP721AP

Littelfuse Inc.In Stock: 2216SP721AP Datasheet

Current PartRFQ

SP721APP

Littelfuse Inc.In Stock: 2115SP721APP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SP721AP is determined by the following critical parameters:

• Package Compatibility: 8-DIP (0.300", 7.62mm) through-hole configuration
• Circuit Count: 6 circuits for functional equivalence
• Technology Type: Mixed Technology TVS architecture
• Mounting Method: Through-hole mounting requirement
• Application Class: General Purpose circuit protection

The SP721AP has one direct substitute part: SP721APP. This substitute maintains identical electrical and mechanical specifications while differing in product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The SP721APP is the direct substitute for the SP721AP. Both parts share identical electrical and mechanical specifications, including package type, circuit count, technology, and application class.

Key differentiators between the two parts:

• Product Status: SP721AP is obsolete; SP721APP is active and currently manufactured
• RoHS Compliance: SP721AP is RoHS non-compliant; SP721APP is ROHS3 compliant
• Packaging Format: SP721APP is supplied in tube packaging

For new designs and ongoing procurement, SP721APP is the appropriate selection due to its active product status and ROHS3 compliance certification. For legacy system repairs requiring exact form-factor matching, SP721APP maintains full pin-to-pin and functional compatibility with SP721AP.

Frequently Asked Questions (FAQ)

Q: Can SP721APP be used as a direct replacement for SP721AP?

A: Yes. SP721APP is a direct substitute with identical package type (8-DIP), circuit count (6), technology (Mixed Technology), and mounting method (Through Hole). Both parts are functionally equivalent for general-purpose circuit protection applications.

Q: What is the difference between SP721AP and SP721APP?

A: The primary differences are product status and compliance. SP721AP is obsolete and RoHS non-compliant, while SP721APP is an active product with ROHS3 compliance. SP721APP is supplied in tube packaging. Electrical and mechanical specifications are identical.

Q: Is SP721APP available in the same package as SP721AP?

A: Yes. Both parts use the 8-DIP (0.300", 7.62mm) through-hole package with 8-PDIP supplier device package designation. Pin configuration and board layout compatibility are maintained.

Q: Why should I use SP721APP instead of SP721AP?

A: SP721AP is obsolete and no longer manufactured. SP721APP is the active equivalent part, ensuring long-term availability and supply chain continuity. Additionally, SP721APP meets ROHS3 compliance requirements, which may be necessary for regulatory or customer specifications.

Q: Are there any application limitations when substituting SP721APP for SP721AP?

A: No. Both parts are rated for general-purpose circuit protection applications with identical electrical and mechanical parameters. Substitution does not introduce application limitations.