EYP-2BN143 Thermal Cutoff (TCO) Equivalent & Substitute Parts

Part Overview

The EYP-2BN143 is a Thermal Cutoff (TCO) device manufactured by Panasonic Electronic Components, rated for 250VAC/50VDC at 2A with a functioning temperature of 145°C (293°F). This component is classified as Obsolete, making substitute parts necessary for new designs and ongoing production requirements. The axial package configuration and BEAB, CCC, CSA, PSE, UL, and VDE certifications define its application scope in thermal protection circuits.

Substiute Parts

EYP-2BN143

Panasonic Electronic ComponentsIn Stock: 739EYP-2BN143 Datasheet

Current PartRFQ

SDF DF144S

CanthermIn Stock: 4038SDF DF144S Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the EYP-2BN143 is determined by the following critical parameters:

• Voltage Rating (AC/DC): Must meet or exceed 250VAC and 50VDC
• Package Type: Axial configuration required for mechanical compatibility
• Functioning Temperature: Must operate at or near 145°C (293°F)
• Holding Temperature: Must maintain 120°C (248°F) threshold
• Approval Certifications: Must include UL, VDE, and PSE certifications for regulatory compliance

The SDF DF144S from Cantherm meets these substitution criteria with equivalent voltage ratings, axial packaging, and comparable thermal characteristics. The functioning temperature of 144°C (291°F) is within acceptable tolerance of the original 145°C specification. Current rating differences (10A vs. 2A) do not preclude substitution when the application circuit design accommodates the higher current capacity.

Parameter Comparison

Engineering Selection Recommendations

The SDF DF144S is suitable as a substitute for the EYP-2BN143 based on the following factors:

• Both components maintain identical AC voltage ratings (250VAC) and equivalent functioning temperatures (144°C vs. 145°C)
• Both components share identical holding temperatures (120°C)
• Both components are packaged in axial configuration, ensuring mechanical compatibility
• Both components hold UL, VDE, and PSE certifications, meeting primary regulatory requirements
• The SDF DF144S is Active product status, ensuring continued availability and supply chain stability
• The SDF DF144S carries ROHS3 compliance, meeting current environmental standards

The higher current rating of the SDF DF144S (10A vs. 2A) requires circuit design verification to ensure the application does not exceed the original 2A specification unintentionally.

Frequently Asked Questions (FAQ)

Q: Can the SDF DF144S directly replace the EYP-2BN143 in existing designs?

A: Direct mechanical and electrical substitution is possible due to identical axial packaging, matching voltage ratings, and equivalent thermal characteristics. However, circuit design review is necessary to confirm the higher current rating (10A) does not introduce unintended operational changes.

Q: What is the significance of the 1°C difference in functioning temperature (145°C vs. 144°C)?

A: The 1°C difference is within normal manufacturing tolerance for thermal cutoff devices and does not affect functional equivalence in thermal protection applications.

Q: Are the approval certifications equivalent between the two parts?

A: Both parts hold UL, VDE, and PSE certifications. The EYP-2BN143 includes additional BEAB and CSA certifications, while the SDF DF144S includes cUL certification. Application requirements determine whether these differences are material.

Q: Does the ROHS3 compliance of the SDF DF144S affect compatibility?

A: ROHS3 compliance of the substitute part does not negatively affect compatibility. It indicates the part meets current environmental standards and may be required for new designs subject to RoHS regulations.

Q: What should be verified before implementing the SDF DF144S as a substitute?

A: Verify that the circuit design accommodates the 10A current rating without altering the intended thermal protection behavior. Confirm that all required approval certifications for the application are present in both the original and substitute specifications.