SSM1A445BD Equivalent & Substitute Parts

Part Overview

The SSM1A445BD is a Solid State Relay (SSR) manufactured by Schneider Electric, part of the Harmony series. This SPST-NO (1 Form A) relay features an integrated heat sink and is rated for 45 A load current with input voltage range of 4–32 VDC and load voltage range of 48–600 V AC. The device is classified as obsolete, making identification of equivalent and substitute parts necessary for system maintenance, repair, and component sourcing in applications where this relay is currently deployed.

Substiute Parts

SSM1A445BD

Schneider ElectricIn Stock: 728SSM1A445BD Datasheet

Current PartRFQ

SSD1A345BDC2

Schneider ElectricIn Stock: 1106SSD1A345BDC2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SSM1A445BD is based on electrical and mechanical parameter equivalence within the Schneider Electric Harmony series. The substitute part must satisfy the following criteria:

Electrical Parameters (Must Match):

• Circuit configuration: SPST-NO (1 Form A)
• Output type: AC, Zero Cross
• Input voltage range: 4–32 VDC
• Load voltage range: 48–600 V
• Load current rating: 45 A

Mechanical Parameters (Must Match):

• Mounting type: DIN Rail
• Termination style: Screw Terminal
• Series: Harmony

Compliance Parameters:

• RoHS3 compliance
• ECCN classification: EAR99

The substitute part SSD1A345BDC2 meets all electrical and mechanical requirements. The primary difference is the package configuration: the SSM1A445BD features an integrated heat sink, while the SSD1A345BDC2 is supplied as a module. Both are active or available alternatives within the Harmony series.

Parameter Comparison

Engineering Selection Recommendations

The SSD1A345BDC2 is the manufacturer-recommended substitute for the obsolete SSM1A445BD. Both components are manufactured by Schneider Electric within the Harmony series and maintain identical electrical specifications across input voltage, load voltage, load current, circuit configuration, and output switching characteristics.

Product Status Consideration: The SSM1A445BD is classified as obsolete, while the SSD1A345BDC2 is active. For new designs and ongoing system support, the SSD1A345BDC2 is the appropriate selection.

Compliance Alignment: Both parts maintain ROHS3 compliance and EAR99 ECCN classification, ensuring regulatory consistency in applications requiring these certifications.

Package Difference: The primary distinction is packaging. The SSM1A445BD includes an integrated heat sink, whereas the SSD1A345BDC2 is supplied as a module. System thermal management design must account for this difference. If integrated heat sink functionality is critical to the application, external thermal management provisions may be required when implementing the SSD1A345BDC2.

Frequently Asked Questions (FAQ)

Q: Can the SSD1A345BDC2 directly replace the SSM1A445BD in existing installations?

A: The SSD1A345BDC2 is electrically and mechanically equivalent to the SSM1A445BD. Both support identical input voltage (4–32 VDC), load voltage (48–600 V), load current (45 A), and mounting configuration (DIN Rail with screw terminals). The primary consideration is thermal management: the SSM1A445BD includes an integrated heat sink, while the SSD1A345BDC2 does not. Verify that the application's thermal environment and cooling provisions are adequate for the module-only configuration.

Q: What is the significance of the package difference between SSM1A445BD and SSD1A345BDC2?

A: The SSM1A445BD is supplied with an integrated heat sink as part of the complete assembly. The SSD1A345BDC2 is a module without integrated heat sink. Both are DIN Rail mounted with screw terminals. The integrated heat sink on the SSM1A445BD provides passive thermal dissipation; the SSD1A345BDC2 relies on the mounting surface and ambient conditions for heat dissipation. System design must ensure adequate thermal pathways when using the SSD1A345BDC2.

Q: Are there any compliance or certification differences between these parts?

A: Both the SSM1A445BD and SSD1A345BDC2 are ROHS3 compliant and classified under ECCN EAR99. No compliance or certification differences exist between the two parts.

Q: Why is the SSM1A445BD classified as obsolete?

A: The SSM1A445BD is listed as obsolete by Schneider Electric. The SSD1A345BDC2 is the active equivalent within the Harmony series. For new procurements and system designs, the SSD1A345BDC2 is the recommended selection.

Q: Are the electrical switching characteristics identical between these relays?

A: Yes. Both the SSM1A445BD and SSD1A345BDC2 feature SPST-NO (1 Form A) circuit configuration with AC output type and zero-cross switching. Input voltage range (4–32 VDC), load voltage range (48–600 V), and load current rating (45 A) are identical.