SP720ABT Equivalent & Substitute Parts

Part Overview

The SP720ABT is a Transient Voltage Suppressor (TVS) device manufactured by Littelfuse Inc., designed for circuit protection applications. This mixed-technology component integrates 14 circuits in a 16-SOIC surface mount package. The SP720ABT is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

SP720ABT

Littelfuse Inc.In Stock: 4455SP720ABT Datasheet

Current PartRFQ

SP720ABTG

Littelfuse Inc.In Stock: 19134SP720ABTG Datasheet

DirectRFQ

SP721ABTG

Littelfuse Inc.In Stock: 5309SP721ABTG Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SP720ABT is determined by the following critical parameters:

• Manufacturer: Littelfuse Inc. (same manufacturer ensures design compatibility)
• Technology: Mixed Technology (functional equivalence)
• Mounting Type: Surface Mount (PCB assembly compatibility)
• Applications: General Purpose (functional scope)
• Moisture Sensitivity Level: MSL 1 (storage and handling compatibility)

Two substitute parts meet these criteria:

SP720ABTG — Direct functional equivalent with identical circuit count (14 circuits) and package configuration (16-SOIC). Product status is Active with ROHS3 compliance.

SP721ABTG — Alternative configuration with reduced circuit count (6 circuits) and smaller package (8-SOIC). Product status is Active with ROHS3 compliance. This part is suitable only for applications requiring fewer protection circuits.

Parameter Comparison

Engineering Selection Recommendations

SP720ABTG is the primary substitute for SP720ABT. Both parts maintain identical circuit count (14) and package footprint (16-SOIC), ensuring direct PCB compatibility without layout modifications. SP720ABTG carries Active product status and ROHS3 compliance, providing regulatory alignment for new designs and procurement continuity for existing applications.

SP721ABTG is a secondary alternative applicable only to designs requiring fewer protection circuits (6 circuits). The 8-SOIC package requires PCB layout changes and is suitable only when circuit count reduction aligns with application requirements. SP721ABTG also provides Active status and ROHS3 compliance.

Both substitute parts maintain identical Moisture Sensitivity Level (MSL 1) and export classification (EAR99), ensuring compatibility with existing supply chain and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can SP720ABTG be used as a direct replacement for SP720ABT without PCB modifications?

A: Yes. SP720ABTG maintains identical package footprint (16-SOIC), circuit count (14), and mounting type (Surface Mount), enabling direct PCB substitution without layout changes.

Q: What is the primary difference between SP720ABTG and SP721ABTG?

A: SP720ABTG retains the original 14-circuit configuration in a 16-SOIC package. SP721ABTG reduces circuit count to 6 and uses an 8-SOIC package. Selection depends on application protection requirements and available PCB space.

Q: Why is SP720ABT classified as obsolete?

A: SP720ABT is no longer in active production. SP720ABTG provides functional continuity with improved regulatory compliance (ROHS3).

Q: Are there compliance differences between the substitute parts and the original?

A: SP720ABT is RoHS non-compliant. Both SP720ABTG and SP721ABTG are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

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

A: Yes. All three parts maintain MSL 1 (Unlimited), requiring identical storage and handling protocols.

Q: Which substitute part should be selected for new designs?

A: SP720ABTG is recommended for new designs requiring 14-circuit protection in a 16-SOIC package. SP721ABTG is suitable only if application requirements support reduced circuit count and smaller package dimensions.