SA72CB0 Equivalent & Substitute Parts

Part Overview

The SA72CB0 is a thermal cutoff (TCO) breaker manufactured by Bourns Inc., designed for AC/DC applications with a functioning temperature of 72°C (162°F) and a reset temperature of 40°C (104°F). This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design and procurement requirements. The SA72CB0 operates at 12 A current rating with a 28 V DC voltage rating and carries approvals from cUL, TUV, and UL standards bodies.

Substiute Parts

SA72CB0

Bourns Inc.In Stock: 1013SA72CB0 Datasheet

Current PartRFQ

SA72SB0

Bourns Inc.In Stock: 6871SA72SB0 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SA72CB0 is determined by the following critical parameters that must remain constant across equivalent parts:

• Rated functioning temperature: 72°C (162°F)
• Reset temperature: 40°C (104°F)
• Voltage rating: 28 V DC
• Type: SPST-NC breaker configuration
• Approval certifications: cUL, TUV, UL
• Compliance standards: ROHS3, REACH Unaffected

The SA72SB0 qualifies as a substitute based on matching all thermal, electrical, and regulatory parameters. The primary difference is an increased current rating (25 A versus 12 A), which represents a higher capacity variant within the same functional specification set. This higher current rating does not preclude substitution in applications designed for the 12 A rating, as the component will operate within its specified parameters.

Parameter Comparison

Engineering Selection Recommendations

The SA72SB0 is the designated substitute for the obsolete SA72CB0. Both components maintain identical thermal trip points (72°C functioning, 40°C reset) and voltage specifications (28 V DC), ensuring functional equivalence in thermal management applications. The SA72SB0 carries active product status with full availability, whereas the SA72CB0 is obsolete. Both parts maintain equivalent regulatory compliance across cUL, TUV, and UL certifications, as well as ROHS3 and REACH compliance requirements.

The increased current rating of the SA72SB0 (25 A versus 12 A) does not create incompatibility with designs specified for 12 A operation. The substitute will function identically within the thermal and electrical parameters of the original specification.

Frequently Asked Questions (FAQ)

Q: Can the SA72SB0 directly replace the SA72CB0 in existing designs?

A: Yes. Both components share identical thermal trip temperatures (72°C/40°C), voltage ratings (28 V DC), and regulatory certifications (cUL, TUV, UL). The SA72SB0's higher current rating (25 A) does not affect compatibility with 12 A circuit designs.

Q: What is the primary reason for substitution?

A: The SA72CB0 is obsolete. The SA72SB0 is an active product from the same manufacturer and series with equivalent thermal and electrical specifications.

Q: Are there packaging differences between these parts?

A: Yes. The SA72CB0 uses nonstandard packaging, while the SA72SB0 is supplied in Tape & Reel (TR) format. Verify packaging compatibility with your assembly process requirements.

Q: Do both parts carry the same regulatory approvals?

A: Yes. Both the SA72CB0 and SA72SB0 are certified by cUL, TUV, and UL, and both comply with ROHS3 and REACH requirements.

Q: What determines whether a part can substitute for the SA72CB0?

A: Substitution is determined by matching the rated functioning temperature (72°C), reset temperature (40°C), voltage rating (28 V DC), SPST-NC configuration, and regulatory certifications (cUL, TUV, UL). Current rating may exceed the original specification without creating incompatibility.