CMRD4855P Solid State Relay - Equivalent & Substitute Parts

Part Overview

The CMRD4855P is a Solid State SPST-NO (1 Form A) relay manufactured by Sensata-Crydom, designed for AC load switching applications with zero-cross detection. This component features an integrated heat sink and DIN rail mounting capability, rated for 55A load current across a 48V to 530V operating range with 4-32VDC input control voltage. The CMRD4855P is designated as Last Time Buy, indicating discontinued production status. Identification of equivalent substitute parts is necessary to ensure continued availability and support for applications currently utilizing this component.

Substiute Parts

CMRD4855P

Sensata-CrydomIn Stock: 922CMRD4855P Datasheet

Current PartRFQ

DR4560D60P

Sensata-CrydomIn Stock: 772DR4560D60P Datasheet

MFR RecommendedRFQ

DR4560D60P

Sensata-CrydomIn Stock: 772DR4560D60P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CMRD4855P is based on functional equivalence across the following critical parameters: circuit configuration (SPST-NO), output type (AC with zero-cross detection), input voltage range (4-32VDC), load voltage range compatibility, load current capacity, mounting type (DIN Rail), termination style (Screw Terminal), and package form (SSR with integrated heat sink).

The DR4560D60P qualifies as a substitute based on matching all core functional parameters. The substitute part maintains identical input voltage specification (4-32VDC), circuit topology (SPST-NO), output switching type (AC, zero-cross), mounting configuration (DIN Rail), termination method (Screw Terminal), and physical package form (SSR with integrated heat sink). The load voltage range of the substitute (48V-600V) encompasses the original specification (48V-530V). The load current rating of the substitute (60A) exceeds the original specification (55A), providing operational margin within the same thermal and mechanical envelope.

Parameter Comparison

Engineering Selection Recommendations

The DR4560D60P is the designated manufacturer-recommended substitute for the CMRD4855P. Selection of the DR4560D60P is supported by the following factors: the substitute maintains Active product status, ensuring long-term availability and manufacturing support, whereas the original part is designated Last Time Buy. Both components carry equivalent export classification (EAR99) and tariff coding (HTSUS 8536.49.0080). The substitute meets RoHS compliance requirements. The DR4560D60P provides enhanced load current capacity (60A versus 55A) and extended load voltage range (600V versus 530V maximum), delivering improved operational margins within an identical mechanical and thermal form factor.

Frequently Asked Questions (FAQ)

Q: Can the DR4560D60P directly replace the CMRD4855P in existing applications?

A: The DR4560D60P is functionally equivalent across all critical parameters: input voltage range, circuit configuration, output switching type, mounting method, and termination style. The substitute accommodates the original load voltage and current specifications while providing additional operational margin.

Q: What are the key differences between these parts?

A: The primary differences are product status (Last Time Buy versus Active), load current rating (55A versus 60A), and maximum load voltage (530V versus 600V). The DR4560D60P offers higher current capacity and voltage range within the same package.

Q: Are there any compliance or certification differences?

A: Both parts carry identical export classification (EAR99) and tariff coding. The CMRD4855P is ROHS3 Compliant; the DR4560D60P is RoHS Compliant. Both meet regulatory requirements for their respective product statuses.

Q: Does the higher current rating of the substitute affect thermal performance?

A: Both components utilize identical package forms with integrated heat sinks and DIN rail mounting. The substitute's higher current rating is engineered within the same thermal envelope.

Q: Are the screw terminal connections identical?

A: Both parts utilize Screw Terminal termination style, maintaining identical connection methodology and installation procedures.