Equivalent & Substitute Parts for AA85AB0

Part Overview

The AA85AB0 is a thermal cutoff (TCO) breaker manufactured by Bourns Inc. from the Komatsulite™ AA series. This component functions as a nonstandard strap solder thermal cutoff rated for 35 A at 85°C (185°F) with a reset temperature of 40°C (104°F). The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain the same electrical and mechanical specifications for continued system integration.

Substiute Parts

AA85AB0

Bourns Inc.In Stock: 1080AA85AB0 Datasheet

Current PartRFQ

HC85AY-1

Bourns Inc.In Stock: 1842HC85AY-1 Datasheet

DirectRFQ

AC85ABD

Bourns Inc.In Stock: 1079AC85ABD Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AA85AB0 is determined by the following critical parameters: rated functioning temperature (85°C), reset temperature (40°C), voltage rating (28 V DC), current rating, package type (nonstandard strap solder), and regulatory compliance (cUL, TUV, UL). Two substitute parts are identified:

AC85ABD — Direct functional equivalent with identical current rating (35 A), temperature specifications, voltage rating, and all regulatory certifications. Active product status with current manufacturing availability.

HC85AY-1 — Partial equivalent with matching temperature and voltage specifications but reduced current rating (25 A versus 35 A). Active product status. This substitute is applicable only in applications where the 25 A current rating is sufficient.

Parameter Comparison

Engineering Selection Recommendations

AC85ABD is the primary substitute for AA85AB0. This part maintains full electrical and mechanical compatibility with identical current rating (35 A), temperature thresholds, voltage specification, and regulatory certifications. The AC85ABD holds active product status with current manufacturing availability, ensuring supply chain continuity.

HC85AY-1 serves as a secondary substitute only in applications where circuit current requirements do not exceed 25 A. While this part shares all temperature, voltage, and regulatory specifications with the main part, the reduced current rating limits its applicability to lower-amperage designs.

Both substitutes carry identical regulatory approvals (cUL, TUV, UL), RoHS3 compliance, and moisture sensitivity ratings, ensuring compliance with existing design certifications and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can AC85ABD directly replace AA85AB0 in all applications? A: Yes. AC85ABD matches all critical electrical parameters (35 A current rating, 85°C functioning temperature, 28 V DC rating) and mechanical specifications (nonstandard strap solder package). Both parts carry identical regulatory certifications.

Q: What is the primary difference between AC85ABD and HC85AY-1? A: The current rating differs. AC85ABD is rated for 35 A, matching the original AA85AB0. HC85AY-1 is rated for 25 A. Both share identical temperature specifications (85°C functioning, 40°C reset) and voltage rating (28 V DC).

Q: Is HC85AY-1 suitable as a substitute if my circuit operates below 25 A? A: HC85AY-1 is suitable only if the maximum circuit current does not exceed 25 A. All other electrical and thermal specifications align with AA85AB0.

Q: Do the substitute parts maintain the same regulatory certifications? A: Yes. Both AC85ABD and HC85AY-1 carry cUL, TUV, and UL approvals, matching the certifications of AA85AB0. Both are ROHS3 compliant and REACH unaffected.

Q: What is the package difference between these parts? A: All three parts (AA85AB0, AC85ABD, and HC85AY-1) use nonstandard strap solder packaging. No package conversion is required for substitution.