TE Connectivity Potter & Brumfield Relay 5-1904012-1 Equivalent & Substitute Parts

Part Overview

The TE Connectivity Potter & Brumfield 5-1904012-1 is a general purpose relay with SPST-NO (1 Form A) contact configuration, rated for 30A at 12VDC coil voltage. This relay is designed for chassis mount applications with quick connect termination. The part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing system support, maintenance, and new design implementations where similar functionality is required.

Substiute Parts

5-1904012-1

TE Connectivity Potter & Brumfield RelaysIn Stock: 10435-1904012-1 Datasheet

Current PartRFQ

4-1393303-7

TE Connectivity AMP ConnectorsIn Stock: 10734-1393303-7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5-1904012-1 is determined by the following critical parameters:

Contact Configuration & Electrical Function: Both the main part and substitute maintain SPST-NO (1 Form A) contact form, ensuring identical switching logic and circuit integration.

Coil Voltage: The 12VDC coil voltage is preserved across the substitute, maintaining compatibility with existing power supply circuits.

Mounting & Termination: Chassis mount configuration is maintained. Termination style differs between the main part (Quick Connect - 0.187"/0.250") and the substitute (Plug In, Quick Connect - 0.110"/2.8mm), requiring mechanical interface verification during implementation.

Contact Current Rating: The substitute part (40A) exceeds the main part specification (30A), providing enhanced current handling capability while remaining backward compatible for applications requiring 30A operation.

Coil Current & Resistance: Coil current decreases from 141.2 mA to 133.3 mA, with coil resistance increasing from 85 Ohms to 90 Ohms, indicating improved efficiency in the substitute design.

Operating Temperature: The substitute extends the upper temperature limit from 105°C to 125°C, providing broader environmental compatibility.

Compliance & Status: The substitute is active product status with RoHS compliance, whereas the main part is obsolete with ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

For Obsolete Part Replacement: The 4-1393303-7 substitute is the manufacturer-recommended replacement for the obsolete 5-1904012-1. Both parts are manufactured by TE Connectivity, ensuring design continuity and quality standards.

Compliance Considerations: The substitute part carries active RoHS compliance status, whereas the main part is ROHS3 compliant. Both parts meet current regulatory requirements for electronic component manufacturing and environmental standards.

Current Capacity Enhancement: The substitute provides 40A contact rating compared to the main part's 30A rating. This increased capacity supports applications with higher current demands while maintaining full backward compatibility for existing 30A circuit designs.

Temperature Operating Range: The substitute extends maximum operating temperature to 125°C, providing enhanced thermal margin for applications operating in elevated ambient conditions compared to the main part's 105°C limit.

Termination Interface: Mechanical interface differences exist between the main part (0.187"/0.250" quick connect) and substitute (0.110"/2.8mm quick connect). Physical connector compatibility must be evaluated during implementation to ensure proper mating with existing socket or terminal configurations.

Electrical Performance: Coil current reduction from 141.2 mA to 133.3 mA in the substitute indicates improved power efficiency. Operate and release times remain identical at 7 ms and 2 ms respectively, ensuring equivalent switching performance.

Frequently Asked Questions (FAQ)

Q: Can the 4-1393303-7 directly replace the 5-1904012-1 in existing applications?

A: Electrical substitution is valid for applications requiring 30A or less. The substitute's 40A rating provides additional capacity. However, termination connector compatibility must be verified, as the main part uses 0.187"/0.250" quick connect terminals while the substitute uses 0.110" (2.8mm) quick connect terminals. Physical socket or terminal modifications may be required.

Q: What are the key electrical differences between these two relays?

A: Both relays maintain identical SPST-NO contact form, 12VDC coil voltage, 7 ms operate time, and 2 ms release time. The substitute provides higher contact current rating (40A vs. 30A), lower coil current (133.3 mA vs. 141.2 mA), and extended operating temperature range (-40°C to 125°C vs. -40°C to 105°C).

Q: Why is the main part classified as obsolete?

A: The 5-1904012-1 is obsolete and no longer in active production. The 4-1393303-7 is the active replacement part from TE Connectivity, offering improved specifications and current manufacturing support.

Q: Are there any compliance or certification differences?

A: The main part carries ROHS3 compliance while the substitute carries RoHS compliance. Both meet current environmental and regulatory standards. Both parts share identical ECCN (EAR99) and HTSUS (8536.41.0050) classifications.

Q: What is the impact of the different switching voltages (12VDC vs. 14VDC nominal)?

A: The nominal switching voltage difference reflects the voltage at which the relay contacts are rated to switch. Both relays operate with 12VDC coil voltage. The substitute's 14VDC nominal switching voltage indicates enhanced contact capability for higher voltage switching applications while maintaining full compatibility with 12VDC coil circuits.

Q: How do the coil resistance values affect circuit design?

A: The main part has 85 Ohm coil resistance while the substitute has 90 Ohms. This 5 Ohm increase results in the lower coil current (133.3 mA vs. 141.2 mA) observed in the substitute. Existing 12VDC power supply circuits designed for the main part will operate the substitute with slightly reduced current draw, improving overall system efficiency.

Q: What considerations apply to the termination style difference?

A: The main part uses Quick Connect - 0.187"/0.250" terminals while the substitute uses Plug In, Quick Connect - 0.110" (2.8mm) terminals. These are physically incompatible connector types. Existing socket or terminal configurations must be evaluated for compatibility. Adapter solutions or terminal replacement may be necessary for direct substitution.

Q: Is the extended temperature range of the substitute beneficial for all applications?

A: The substitute's extended operating range (-40°C to 125°C vs. -40°C to 105°C) provides additional thermal margin. For applications operating within the original part's temperature range, this extension offers no functional advantage but does provide design flexibility for future thermal requirement changes.