CMRA2455 Equivalent & Substitute Parts

Part Overview

The CMRA2455 is a Solid State Relay (SSR) manufactured by Sensata-Crydom, configured as a SPST-NO (1 Form A) relay with integrated heat sink and DIN rail mounting. This component is rated for 55A load current with input voltage range of 90–140VAC and load voltage range of 24–280V. The CMRA2455 operates with AC output type and zero-cross switching characteristics.

The CMRA2455 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain system functionality and ensure continued availability for applications currently utilizing this component.

Substiute Parts

CMRA2455

Sensata-CrydomIn Stock: 1031CMRA2455 Datasheet

Current PartRFQ

DR4560A60

Sensata-CrydomIn Stock: 1010DR4560A60 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CMRA2455 is determined by the following critical parameters:

• Circuit Configuration: Must remain SPST-NO (1 Form A)
• Output Type: Must support AC output with zero-cross switching
• Mounting Interface: Must support DIN rail mounting
• Termination: Must use screw terminal configuration
• Package: Must include integrated heat sink
• Load Current Capability: Substitute must meet or exceed 55A rating
• Voltage Compatibility: Substitute input and load voltage ranges must encompass or exceed the original specification ranges
• Compliance: Must maintain RoHS compliance status

The DR4560A60 satisfies all substitution criteria as a direct equivalent from the same manufacturer.

Parameter Comparison

Engineering Selection Recommendations

The DR4560A60 is the qualified substitute for the CMRA2455. Both components are manufactured by Sensata-Crydom and maintain identical circuit configuration, output type, mounting interface, and termination style. The DR4560A60 provides enhanced specifications across all critical parameters: input voltage range extends to 280VAC/DC (compared to 140VAC maximum for the CMRA2455), load voltage range extends to 600V (compared to 280V maximum), and load current rating increases to 60A (compared to 55A). Both components maintain RoHS compliance. The DR4560A60 carries active product status, ensuring continued availability and manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can the DR4560A60 directly replace the CMRA2455 in existing applications?

A: The DR4560A60 is a direct functional equivalent. Both components share identical circuit configuration (SPST-NO), output type (AC, zero-cross), mounting type (DIN rail), and termination style (screw terminal). The DR4560A60 provides equal or superior performance across all electrical parameters. Physical form factor and heat sink integration are identical.

Q: What are the key differences between these two SSR relays?

A: The primary differences are product status and enhanced electrical ratings. The CMRA2455 is obsolete; the DR4560A60 is active. The DR4560A60 supports higher input voltage (up to 280VAC/DC versus 140VAC), higher load voltage (up to 600V versus 280V), and higher load current (60A versus 55A). These enhancements provide greater application flexibility without compromising compatibility.

Q: Are there any packaging or mounting considerations when substituting?

A: Both components use identical DIN rail mounting and screw terminal termination. Both include integrated heat sinks. No mechanical or electrical interface modifications are required for substitution.

Q: Do both components meet the same compliance standards?

A: Both the CMRA2455 and DR4560A60 are RoHS compliant. Both carry identical ECCN (EAR99) and HTSUS (8536.49.0080) classifications.

Q: Why should I select the DR4560A60 over the CMRA2455?

A: The CMRA2455 is obsolete and subject to availability constraints. The DR4560A60 is an active product with confirmed inventory and manufacturer support. The DR4560A60 provides superior electrical specifications, making it suitable for a broader range of applications while maintaining full compatibility with existing CMRA2455 installations.