CMRA6045 Equivalent & Substitute Parts

Part Overview

The CMRA6045 is a Solid State SPST-NO (1 Form A) SSR relay manufactured by Sensata-Crydom, designed for AC load switching applications with 45A capacity across 48V to 660V load voltage ranges. The unit features an integrated heat sink and DIN Rail mounting configuration with screw terminal connections.

The CMRA6045 is classified as Obsolete. Locating equivalent substitute parts is necessary to maintain system functionality and ensure continued availability for replacement or new installations where this component is specified.

Substiute Parts

CMRA6045

Sensata-CrydomIn Stock: 1166CMRA6045 Datasheet

Current PartRFQ

GNR45BHZ

Sensata-CrydomIn Stock: 877GNR45BHZ Datasheet

DirectRFQ

DR4560A45

Sensata-CrydomIn Stock: 876DR4560A45 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CMRA6045 is determined by the following critical parameters:

• Circuit configuration: SPST-NO (1 Form A) topology
• Output switching type: AC with Zero Cross capability
• Load current rating: 45 A minimum
• Load voltage range: Minimum 48V to maximum 660V (or compatible subset)
• Input voltage: 90 ~ 140VAC or broader range
• Mounting: DIN Rail configuration
• Termination: Screw Terminal connections
• RoHS compliance status

The substitute parts GNR45BHZ and DR4560A45 maintain the core SPST-NO circuit topology, 45A load current, and DIN Rail mounting. Both are manufactured by Sensata-Crydom and feature RoHS compliance. Load voltage ranges differ slightly between candidates, requiring verification against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

DR4560A45 is the manufacturer-recommended substitute for CMRA6045. This part maintains Active product status, ensuring long-term availability and continued manufacturing support. The DR4560A45 provides expanded input voltage range (90 ~ 280VAC/DC) compared to the CMRA6045 (90 ~ 140VAC), offering greater flexibility in control circuit design. Load voltage range is reduced to 48V ~ 600V; applications requiring operation above 600V load voltage cannot use this substitute.

GNR45BHZ is an alternative substitute with identical input voltage range to CMRA6045 (90 ~ 140VAC) and matching load current (45A). However, GNR45BHZ is classified as Obsolete and features a Module package configuration rather than integrated heat sink. This part is suitable only where existing inventory exists and package form factor is compatible with mechanical installation constraints.

Both substitutes maintain RoHS compliance and zero-cross AC switching capability. Selection between DR4560A45 and GNR45BHZ depends on load voltage requirements and product availability constraints.

Frequently Asked Questions (FAQ)

Q: Can DR4560A45 replace CMRA6045 in all applications?

A: DR4560A45 is compatible with CMRA6045 for applications where load voltage does not exceed 600V. The CMRA6045 supports load voltages up to 660V; applications requiring operation in the 601V to 660V range require GNR45BHZ or continued use of CMRA6045 inventory.

Q: What is the difference between the Module package (GNR45BHZ) and SSR with Integrated Heat Sink (CMRA6045, DR4560A45)?

A: Package configuration affects mechanical mounting and thermal management. The integrated heat sink design of CMRA6045 and DR4560A45 provides direct thermal dissipation to the DIN Rail. The Module package of GNR45BHZ requires separate heat sink provision or relies on ambient convection cooling. Verify mechanical compatibility with existing mounting infrastructure before selection.

Q: Is GNR45BHZ a viable long-term substitute?

A: GNR45BHZ is classified as Obsolete. While current inventory exists (789 Pcs), this part is not recommended for new designs or long-term production planning. DR4560A45 (Active status) is the preferred substitute for sustained availability.

Q: What input voltage range should I verify for my control circuit?

A: CMRA6045 and GNR45BHZ both require 90 ~ 140VAC input. DR4560A45 accepts 90 ~ 280VAC/DC input. Verify your control circuit voltage falls within the selected part's input specification. DR4560A45 provides broader compatibility with both AC and DC control sources.

Q: Are all three parts RoHS compliant?

A: Yes. CMRA6045, GNR45BHZ, and DR4560A45 are all RoHS Compliant, meeting environmental and regulatory requirements for restricted substance use.