Equivalent & Substitute Parts for AA72AB0

Part Overview

The AA72AB0 is a thermal cutoff (TCO) device manufactured by Bourns Inc. in the Komatsulite™ AA series. This nonstandard package breaker operates at 72°C (162°F) with a reset temperature of 40°C (104°F), rated for 35 A at 28 V DC. The part is classified as obsolete, making identification of active equivalent components essential for ongoing system support and procurement.

Substiute Parts

AA72AB0

Bourns Inc.In Stock: 895AA72AB0 Datasheet

Current PartRFQ

AC72ABD

Bourns Inc.In Stock: 3756AC72ABD Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The AC72ABD qualifies as a manufacturer-recommended substitute for the AA72AB0 based on the following critical parameters:

• Rated Functioning Temperature: Both parts operate at 72°C (162°F)
• Reset Temperature: Both parts reset at 40°C (104°F)
• Current Rating: Both parts are rated for 35 A
• Voltage Rating - DC: Both parts are rated for 28 V
• Approval Agencies: Both parts carry cUL, TUV, and UL certifications
• RoHS Status: Both parts are ROHS3 Compliant
• REACH Status: Both parts are REACH Unaffected

The AC72ABD is an active product from Bourns Inc., providing continuity for applications currently using the obsolete AA72AB0.

Parameter Comparison

Engineering Selection Recommendations

The AC72ABD is the appropriate selection for applications currently specified with AA72AB0. Both parts maintain identical electrical and thermal specifications, with full alignment on regulatory certifications (cUL, TUV, UL) and compliance standards (ROHS3, REACH Unaffected). The AC72ABD carries active product status, ensuring availability and ongoing manufacturer support. No functional or performance degradation occurs with this substitution.

Frequently Asked Questions (FAQ)

Q: Can AC72ABD directly replace AA72AB0 in existing designs? A: Yes. Both parts share identical rated functioning temperature (72°C), reset temperature (40°C), current rating (35 A), and voltage rating (28 V DC). All regulatory certifications and compliance standards are equivalent.

Q: What is the primary reason for substitution? A: AA72AB0 is classified as obsolete. AC72ABD is the manufacturer-recommended active equivalent, ensuring continued procurement and supply chain stability.

Q: Are there packaging differences between these parts? A: Both parts use nonstandard packaging. Mechanical fit and mounting considerations should be verified against your specific application requirements.

Q: Do both parts carry the same regulatory approvals? A: Yes. Both AA72AB0 and AC72ABD are certified by cUL, TUV, and UL, with ROHS3 compliance and REACH Unaffected status.

Q: Is thermal performance identical between the two parts? A: Yes. Both parts function at 72°C (162°F) and reset at 40°C (104°F), providing identical thermal protection characteristics.