H12WD4850G Solid State Relay - Equivalent & Substitute Parts

Part Overview

The H12WD4850G is a Solid State Relay (SSR) manufactured by Sensata-Crydom, designed for SPST-NO (Single Pole Single Throw - Normally Open) switching applications. This hockey puck-style relay operates with AC output featuring zero-cross switching capability, rated for 50A load current across 48V to 660V operating range. The device is currently in active production status with 1197 units available in inventory.

Substitute parts become necessary when the primary manufacturer part is unavailable, when supply chain constraints exist, or when alternative sourcing is required while maintaining identical electrical and mechanical specifications.

Substiute Parts

H12WD4850G

Sensata-CrydomIn Stock: 1216H12WD4850G Datasheet

Current PartRFQ

84137120N

CrouzetIn Stock: 84984137120N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The H12WD4850G has one qualified substitute part: 84137120N (Crouzet, GN series). This substitution is valid based on the following critical parameters that must remain identical:

• Circuit configuration: SPST-NO (1 Form A)
• Output type: AC with zero-cross switching
• Input voltage range: 4 ~ 32VDC
• Load voltage range: 48 V ~ 660 V
• Load current rating: 50 A
• Package type: Hockey Puck
• Termination style: Screw Terminal
• Mounting type: Chassis Mount

Both parts maintain these specifications, ensuring functional and mechanical compatibility in applications requiring SPST-NO solid state relay switching with identical electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both the H12WD4850G and 84137120N are active production components with identical electrical and mechanical specifications. Selection between these parts should be based on the following factors:

H12WD4850G (Sensata-Crydom): Primary choice when ROHS3 compliance is explicitly required and REACH-affected material sourcing is acceptable. Current inventory availability is 1197 units.

84137120N (Crouzet): Suitable alternative when REACH-unaffected sourcing is preferred or when supply constraints on the primary part exist. Current inventory availability is 791 units. RoHS compliance is maintained, though at the standard level rather than ROHS3.

Both parts are suitable for direct substitution in applications where the specified electrical parameters (50A at 48-660V AC with 4-32VDC control input) and mechanical form factor (hockey puck, screw terminal, chassis mount) are required.

Frequently Asked Questions (FAQ)

Q: Can the 84137120N (Crouzet) be used as a direct replacement for the H12WD4850G (Sensata-Crydom)?

A: Yes. Both parts share identical circuit configuration (SPST-NO), output type (AC zero-cross), voltage ratings (4-32VDC input, 48-660V load), current rating (50A), package type (hockey puck), and termination style (screw terminal). They are mechanically and electrically interchangeable.

Q: What are the key parameters that determine substitution compatibility?

A: The critical parameters are: SPST-NO circuit configuration, AC zero-cross output type, 4-32VDC input voltage range, 48-660V load voltage range, 50A load current rating, hockey puck package type, screw terminal termination, and chassis mount configuration. Any deviation in these parameters disqualifies a part as a substitute.

Q: Are there differences in compliance certifications between these parts?

A: Yes. The H12WD4850G is ROHS3 compliant and REACH-affected. The 84137120N is RoHS compliant (standard level) and REACH-unaffected. Both meet their respective regulatory requirements. Selection should consider your specific compliance requirements.

Q: Does packaging format affect substitution?

A: Packaging format (bulk versus box) does not affect electrical or mechanical compatibility. It is a logistics consideration only and does not impact functional substitution.

Q: What is the significance of the hockey puck package type?

A: The hockey puck package is a specific mechanical form factor for solid state relays designed for chassis mounting with screw terminal connections. This form factor is identical between both parts, ensuring mechanical fit and mounting compatibility.