TFCGV3VT185BC Equivalent & Substitute Parts

Part Overview

The TFCGV3VT185BC is a snap action switch manufactured by C&K, configured as SPDT (Single Pole Double Throw) with chassis mount termination. This component is rated for 11A AC at 277V and 500mA DC at 125V, featuring a straight lever actuator with quick connect terminals. The product is currently obsolete, making identification of functionally compatible alternatives essential for system maintenance and component sourcing.

Substiute Parts

TFCGV3VT185BC

C&KIn Stock: 685TFCGV3VT185BC Datasheet

Current PartRFQ

TMCJG6VT1640Y

C&KIn Stock: 1232TMCJG6VT1640Y Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TFCGV3VT185BC requires evaluation based on the following critical parameters:

Circuit Configuration & Switch Function: The main part operates as SPDT On-Mom. The substitute TMCJG6VT1640Y is configured as SPST-NO Off-Mom, representing a different circuit topology and operational behavior. This fundamental difference in circuit configuration and switch function means the substitute operates under different electrical logic.

Current & Voltage Ratings: The main part is rated 11A AC at 277V and 500mA DC at 125V. The substitute is rated 15A AC at 125V and 500mA DC at 125V. The substitute cannot support the 277V AC requirement of the original part.

Mechanical Characteristics: Both parts share identical actuator type (Lever, Straight), mounting type (Chassis Mount), and termination style (Quick Connect - 0.187"). Operating position is 0.600" for both parts. These mechanical parameters allow physical interchangeability in the mounting location.

Product Status & Compliance: The main part is obsolete; the substitute is active. Both are RoHS compliant and REACH unaffected, meeting current regulatory requirements.

Parameter Comparison

Engineering Selection Recommendations

The TMCJG6VT1640Y is listed as a substitute for the TFCGV3VT185BC based on mechanical compatibility and shared manufacturer origin. However, critical electrical differences exist that must be evaluated against application requirements:

Voltage Limitation: The substitute operates at maximum 125V AC, whereas the original part supports 277V AC. Applications requiring 277V AC operation cannot use this substitute without circuit redesign.

Circuit & Function Differences: The original SPDT On-Mom configuration differs fundamentally from the substitute SPST-NO Off-Mom configuration. These represent different electrical switching logic and cannot be directly interchanged without circuit modification.

Current Capacity: The substitute provides higher AC current capacity (15A versus 11A), which is acceptable for applications within the original 11A requirement.

Product Status & Compliance: The substitute is active and ROHS3 compliant, meeting current regulatory standards. The original part is obsolete, making the substitute the preferred choice for new sourcing when electrical requirements align.

Temperature Range: The substitute supports an extended operating temperature range (-55°C to 150°C versus -40°C to 85°C), providing greater thermal flexibility.

Frequently Asked Questions (FAQ)

Q: Can the TMCJG6VT1640Y directly replace the TFCGV3VT185BC in all applications?

A: No. While both parts share mechanical compatibility (chassis mount, straight lever actuator, quick connect terminals), the substitute cannot support 277V AC applications. Additionally, the circuit configurations differ (SPDT versus SPST-NO), requiring evaluation of switching logic requirements.

Q: What is the primary limitation of using TMCJG6VT1640Y as a substitute?

A: The substitute is rated for 125V AC maximum, whereas the original part operates at 277V AC. Applications requiring 277V AC operation require alternative sourcing or circuit redesign.

Q: Are both parts mechanically interchangeable?

A: Yes, regarding physical mounting. Both parts feature chassis mount configuration, straight lever actuators, identical operating position (0.600"), and matching quick connect terminal style (0.187"). Mechanical installation is compatible.

Q: What compliance certifications apply to the substitute?

A: The TMCJG6VT1640Y is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: Does the substitute provide better performance characteristics?

A: The substitute offers higher AC current capacity (15A versus 11A) and extended operating temperature range (-55°C to 150°C versus -40°C to 85°C). However, these advantages are only applicable in systems where the 125V AC voltage limitation is acceptable.