Sensata-Crydom D4850 Solid State Relay SPST-NO 50A

Part Overview

The Sensata-Crydom D4850 is an active solid state relay (SSR) with SPST-NO (1 Form A) configuration, rated for 50A load current and 80–530V AC output voltage. This hockey puck-style chassis mount relay operates with 3–32VDC input and features zero-cross switching for AC loads. The part is ROHS3 compliant and REACH affected. Equivalent and substitute parts are identified when inventory constraints, regional availability, or specific compliance requirements necessitate alternative sourcing while maintaining functional compatibility.

Substiute Parts

D4850

Sensata-CrydomIn Stock: 987D4850 Datasheet

Current PartRFQ

84134120

Sensata-CrydomIn Stock: 97584134120 Datasheet

DirectRFQ

84137460N

CrouzetIn Stock: 99884137460N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the D4850 is determined by the following critical parameters:

• Circuit Configuration: SPST-NO (1 Form A) — must be identical
• Output Type: AC with zero-cross switching — must be identical
• Load Current: 50 A — must be identical
• Package / Case: Hockey Puck — must be identical
• Mounting Type: Chassis Mount — must be identical
• Termination Style: Screw Terminal — must be identical
• Input Voltage Range: 3–32 VDC — substitute must accommodate this range
• Load Voltage Range: Substitute must support the D4850 operating range of 80–530 V or a range that fully encompasses it

Two substitute parts meet these criteria: Sensata-Crydom 84134120 and Crouzet 84137460N. Both maintain identical circuit configuration, output type, load current, package style, and termination. Both accept 4–32 VDC input (compatible with the D4850's 3–32 VDC requirement) and support 48–660 V load voltage (which encompasses the D4850's 80–530 V range).

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are active products with current manufacturing status. The Sensata-Crydom 84134120 maintains the same manufacturer as the primary part and carries ROHS3 compliance. The Crouzet 84137460N is manufacturer-recommended and carries RoHS compliance; however, it is REACH unaffected, whereas the D4850 is REACH affected. Selection between the D4850 and its substitutes should account for compliance requirements specific to the end application and regional regulations. All three parts are functionally equivalent within their specified operating parameters.

Frequently Asked Questions (FAQ)

Q: Can the 84134120 directly replace the D4850?

A: Yes. Both parts share identical circuit configuration (SPST-NO), output type (AC, zero-cross), load current (50 A), package (hockey puck), mounting type (chassis mount), and termination style (screw terminal). The 84134120 input voltage range (4–32 VDC) is compatible with D4850 applications using 4–32 VDC input. The 84134120 load voltage range (48–660 V) encompasses the D4850 range (80–530 V). Applications requiring input voltages below 4 VDC must use the D4850.

Q: Can the 84137460N directly replace the D4850?

A: Yes. The 84137460N meets all functional requirements: identical circuit configuration, output type, load current, package, mounting type, and termination. Input and load voltage ranges are compatible. The part is manufacturer-recommended. Verify REACH compliance requirements for your application, as the 84137460N is REACH unaffected while the D4850 is REACH affected.

Q: What is the difference between bulk and box packaging?

A: The D4850 and 84134120 are supplied in bulk packaging; the 84137460N is supplied in box packaging. Packaging does not affect electrical or mechanical compatibility. Selection may depend on procurement quantity requirements and storage considerations.

Q: Are all three parts RoHS compliant?

A: The D4850 and 84134120 are ROHS3 compliant. The 84137460N is RoHS compliant. Both compliance levels meet RoHS requirements; ROHS3 represents a more recent standard revision. Verify compliance requirements for your specific application and region.

Q: What does "zero-cross" switching mean?

A: Zero-cross switching synchronizes relay activation to the zero-voltage point of the AC waveform, reducing electromagnetic interference and extending load life. All three parts feature this capability.