CMRD2445 Solid State Relay - Equivalent & Substitute Parts

Part Overview

The CMRD2445 is a Solid State SPST-NO (1 Form A) relay manufactured by Sensata-Crydom, designed for AC load switching applications with integrated heat sink and DIN Rail mounting. This component operates with 3-32VDC input control and handles loads up to 45A at 24-280V AC with zero-cross switching capability. The product is currently Active and maintains 1159 units in stock inventory.

Substitute parts become necessary when the CMRD2445 reaches end-of-life status, when load voltage requirements exceed the 24-280V range, or when alternative packaging configurations are required for specific application constraints.

Substiute Parts

CMRD2445

Sensata-CrydomIn Stock: 1239CMRD2445 Datasheet

Current PartRFQ

GNR45DHZ

Sensata-CrydomIn Stock: 1278GNR45DHZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The GNR45DHZ qualifies as a substitute for the CMRD2445 based on the following critical parameters:

Matching Parameters:

• Circuit configuration: Both are SPST-NO (1 Form A) relays
• Output type: Both feature AC switching with zero-cross capability
• Load current rating: Both rated for 45A
• Input voltage range: Both accept 3-32VDC control input (GNR45DHZ: 4-32VDC)
• Mounting type: Both mount on DIN Rail
• Termination style: Both use Screw Terminal connections
• Manufacturer: Both manufactured by Sensata-Crydom

Differing Parameters:

• Load voltage range: CMRD2445 handles 24-280V; GNR45DHZ handles 48-600V (extended range)
• Package type: CMRD2445 uses integrated heat sink; GNR45DHZ uses module configuration
• Product status: CMRD2445 is Active; GNR45DHZ is Not For New Designs

The GNR45DHZ provides extended load voltage capability, making it suitable for applications requiring higher voltage switching while maintaining identical current handling and control characteristics.

Parameter Comparison

Engineering Selection Recommendations

CMRD2445 Selection Criteria:

• Applications requiring load voltages between 24-280V AC
• New designs requiring active product status and ROHS3 compliance
• Systems where integrated heat sink packaging is preferred
• Control input voltage range 3-32VDC

GNR45DHZ Selection Criteria:

• Applications requiring extended load voltage range up to 600V AC
• Existing systems already utilizing GNR series components
• Minimum input voltage requirement of 4VDC is acceptable
• Module-based packaging meets mechanical constraints

The GNR45DHZ is designated "Not For New Designs," indicating it is suitable only for replacement, repair, or continuation of existing applications. For new product development, the CMRD2445 is the appropriate selection due to its Active status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can GNR45DHZ directly replace CMRD2445 in existing applications?

A: Direct replacement is possible only if the application load voltage does not exceed 280V AC. The GNR45DHZ's extended voltage range (48-600V) makes it compatible with CMRD2445 applications operating within the 24-280V window. Verify that the minimum input voltage of 4VDC meets your control circuit requirements.

Q: What is the primary difference between these two relays?

A: The primary difference is load voltage handling capability. CMRD2445 operates at 24-280V AC, while GNR45DHZ operates at 48-600V AC. Both maintain identical 45A current rating, SPST-NO configuration, and zero-cross AC switching characteristics.

Q: Why is GNR45DHZ marked "Not For New Designs"?

A: This designation indicates the product is in end-of-life status. It remains available for replacement and repair of existing systems but should not be selected for new product development. Use CMRD2445 for new applications.

Q: Are the package types interchangeable?

A: Package types differ: CMRD2445 features integrated heat sink design, while GNR45DHZ uses module configuration. Physical mounting dimensions and thermal characteristics may differ. Verify mechanical fit and thermal requirements before substitution.

Q: Do both relays meet the same compliance standards?

A: CMRD2445 is ROHS3 Compliant. GNR45DHZ is RoHS Compliant. Both are REACH Affected and carry EAR99 ECCN classification. Verify compliance requirements for your specific application and regulatory jurisdiction.