SA85CB0 Thermal Cutoff Thermostat - Equivalent & Substitute Parts

Part Overview

The SA85CB0 is a thermal cutoff (TCO) device manufactured by Bourns Inc., designed for AC/DC applications with a functioning temperature of 85°C (185°F) and a reset temperature of 40°C (104°F). This SPST-NC (Single Pole Single Throw - Normally Closed) component is rated for 12 A at 28 VDC and features nonstandard packaging with surface-mount design (4SMD).

The SA85CB0 is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications. The SA85SB0 serves as a direct functional equivalent with enhanced current rating capability.

Substiute Parts

SA85CB0

Bourns Inc.In Stock: 5481SA85CB0 Datasheet

Current PartRFQ

SA85SB0

Bourns Inc.In Stock: 44923SA85SB0 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The SA85SB0 qualifies as a direct substitute for the SA85CB0 based on the following critical parameters:

• Identical manufacturer (Bourns Inc.) and series (SA)
• Identical functioning temperature (85°C) and reset temperature (40°C)
• Identical voltage rating (28 VDC)
• Identical switch type (SPST-NC)
• Identical package classification (Nonstandard)
• Identical approval certifications (cUL, TUV, UL)
• Identical RoHS and REACH compliance status

The primary difference is the current rating: SA85SB0 is rated for 25 A compared to the SA85CB0's 12 A rating. This higher current capacity makes the SA85SB0 suitable for applications requiring the same thermal protection characteristics but with greater current-handling capability.

Parameter Comparison

Engineering Selection Recommendations

The SA85SB0 is the recommended substitute for the obsolete SA85CB0. Both components maintain identical thermal protection characteristics (85°C functioning temperature, 40°C reset temperature) and voltage specifications (28 VDC). The SA85SB0 carries active product status with established supply availability, whereas the SA85CB0 is obsolete.

The SA85SB0's increased current rating (25 A versus 12 A) provides design flexibility for applications requiring higher current capacity while maintaining the same thermal cutoff protection. Both parts carry equivalent regulatory certifications (cUL, TUV, UL) and comply with ROHS3 and REACH requirements, ensuring regulatory compliance continuity.

Frequently Asked Questions (FAQ)

Q: Can the SA85SB0 replace the SA85CB0 in existing designs?

A: Yes. The SA85SB0 is functionally equivalent with identical thermal characteristics, voltage rating, and regulatory certifications. The higher current rating (25 A) is a superset capability that does not compromise compatibility with applications designed for 12 A operation.

Q: What is the primary difference between these two parts?

A: The current rating differs: SA85CB0 is rated for 12 A, while SA85SB0 is rated for 25 A. All other electrical and thermal parameters are identical.

Q: Are there packaging differences between SA85CB0 and SA85SB0?

A: Both parts use nonstandard packaging. The SA85SB0 is supplied in Tape & Reel (TR) format, which is standard for production environments. Packaging format should be verified against specific assembly requirements.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both SA85CB0 and SA85SB0 carry identical approvals from cUL, TUV, and UL. Both are ROHS3 compliant and REACH unaffected.

Q: Why is the SA85CB0 listed as obsolete?

A: The SA85CB0 has been discontinued by the manufacturer. The SA85SB0 represents the active equivalent in the Bourns SA series thermal cutoff product line.