H12WD4850P Equivalent & Substitute Parts

Part Overview

The H12WD4850P is a solid-state relay (SSR) manufactured by Sensata-Crydom, classified as a SPST-NO (1 Form A) hockey puck configuration. This component functions as an electronic switch for AC load control with zero-cross detection capability. The part is currently in active production status with 605 units available in inventory.

Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when system design requires alternative sourcing options while maintaining equivalent electrical and mechanical performance.

Substiute Parts

H12WD4850P

Sensata-CrydomIn Stock: 660H12WD4850P Datasheet

Current PartRFQ

84138120N

CrouzetIn Stock: 95584138120N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the H12WD4850P is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A) to maintain identical switching topology
• Output Type: Must support AC with zero-cross detection for synchronized load switching
• Input Voltage Range: Must accommodate 4 – 32 VDC control signal
• Load Current Rating: Must be rated for 50 A continuous operation
• Package Type: Must be hockey puck configuration for mechanical compatibility
• Termination Style: Must use screw terminal connections
• Mounting Type: Must support chassis mount installation

The substitute part 84138120N (Crouzet GN+ series) meets all mandatory circuit and mechanical requirements. The load voltage range differs (24 V – 500 V versus 48 V – 660 V), which represents a functional constraint that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the H12WD4850P and 84138120N are active production components with RoHS compliance and unlimited moisture sensitivity ratings, indicating equivalent environmental qualification levels.

Selection between these parts depends on load voltage requirements. The H12WD4850P supports loads up to 660 V, while the 84138120N is rated to 500 V maximum. Applications requiring voltages above 500 V necessitate the H12WD4850P. Applications operating within the 24 V – 500 V range are compatible with either part.

Both components share identical input voltage control ranges (4 – 32 VDC), current ratings (50 A), circuit topology (SPST-NO), and mechanical form factors (hockey puck, screw terminal, chassis mount), ensuring functional interchangeability within voltage constraints.

Frequently Asked Questions (FAQ)

Q: Can the 84138120N replace the H12WD4850P in all applications?

A: The 84138120N is functionally equivalent for applications where the load voltage does not exceed 500 V. Applications requiring load voltages between 500 V and 660 V require the H12WD4850P.

Q: Are the input control voltage requirements identical?

A: Yes. Both parts accept 4 – 32 VDC input signals and share identical control logic.

Q: Do both parts support the same current rating?

A: Yes. Both are rated for 50 A continuous load current.

Q: Are the physical packages interchangeable?

A: Yes. Both use hockey puck configuration with screw terminal connections and chassis mount installation, ensuring mechanical compatibility.

Q: What is the significance of zero-cross detection?

A: Zero-cross detection synchronizes relay switching to the AC voltage zero-crossing point, reducing electromagnetic interference and extending load component life. Both parts incorporate this feature.

Q: Are there compliance differences between these parts?

A: Both parts are RoHS compliant and carry MSL 1 (unlimited) moisture sensitivity ratings. The 84138120N additionally carries REACH Unaffected status.