E3X-SD21 Equivalent & Substitute Parts

Part Overview

The E3X-SD21 is a standard sensor amplifier manufactured by Omron Automation and Safety, designed for fiber optic sensor applications with DIN Rail mounting. This component operates across a 12V to 24V supply range with NPN output configuration and is classified as obsolete. Due to its obsolete status, identifying functionally equivalent active alternatives is essential for system continuity and procurement planning.

Substiute Parts

E3X-SD21

Omron Automation and SafetyIn Stock: 998E3X-SD21 Datasheet

Current PartRFQ

E3NX-FA41 2M

Omron Automation and SafetyIn Stock: 330474E3NX-FA41 2M Datasheet

SimilarRFQ

E3X-HD41 2M

Omron Automation and SafetyIn Stock: 1921E3X-HD41 2M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the E3X-SD21 are identified based on the following critical parameters that determine functional equivalence:

Primary Compatibility Criteria:

• Amplifier Type: Standard
• Operating Temperature Range: -25°C ~ 55°C (TA)
• Manufacturer: Omron Automation and Safety
• Supply Voltage Compatibility: Overlapping or compatible voltage ranges
• Output Type: NPN or equivalent switching output

Substitute Parts Identified:

E3X-HD41 2M — Active product with matching voltage range (12V ~ 24V), standard amplifier type, and compatible operating temperature. Output type is PNP - Open Collector with higher current supply (60 mA). DIN Rail mounting maintained. Product status is Active with ROHS3 compliance.

E3NX-FA41 2M — Active product with extended voltage range (10V ~ 30V), standard amplifier type, and matching operating temperature. Broader supply voltage compatibility accommodates the E3X-SD21 specification. Product status is Active with ROHS3 compliance and REACH Affected designation.

Parameter Comparison

Engineering Selection Recommendations

E3X-HD41 2M is the primary substitute for direct replacement applications. It maintains identical supply voltage range (12V ~ 24V), matching operating temperature specifications, and DIN Rail mounting configuration. The product is Active with ROHS3 compliance. The output type differs from NPN to PNP - Open Collector, and current supply increases from 40 mA to 60 mA. These differences require circuit-level verification for compatibility with existing control logic.

E3NX-FA41 2M provides an alternative with extended supply voltage range (10V ~ 30V), accommodating broader system configurations. The product is Active with ROHS3 compliance and REACH Affected status. This option is suitable for applications where voltage flexibility is advantageous. Output type and mounting specifications are not provided in available documentation.

Both substitutes are manufactured by Omron Automation and Safety, maintaining supply chain consistency and technical support continuity.

Frequently Asked Questions (FAQ)

Q: Why is the E3X-SD21 being discontinued? A: The E3X-SD21 is classified as obsolete. Omron has transitioned to active product lines including the E3X-HD and E3NX series for fiber sensor amplifier applications.

Q: Can E3X-HD41 2M directly replace E3X-SD21 in existing installations? A: E3X-HD41 2M shares the same supply voltage range (12V ~ 24V), operating temperature (-25°C ~ 55°C), and DIN Rail mounting. However, the output type differs (PNP - Open Collector vs. NPN), requiring verification of downstream control circuit compatibility before substitution.

Q: What is the advantage of E3NX-FA41 2M over E3X-HD41 2M? A: E3NX-FA41 2M provides extended supply voltage range (10V ~ 30V) compared to E3X-HD41 2M (12V ~ 24V). This broader range accommodates systems with variable or lower voltage supplies. Selection depends on specific system voltage requirements.

Q: Are both substitutes RoHS compliant? A: Yes, both E3X-HD41 2M and E3NX-FA41 2M are ROHS3 compliant, meeting current environmental and regulatory standards.

Q: What packaging options are available for the substitute parts? A: E3X-HD41 2M is supplied in Box packaging. E3NX-FA41 2M is supplied in Bulk packaging. Packaging selection may affect procurement quantities and logistics considerations.

Q: Does E3NX-FA41 2M have REACH compliance information? A: E3NX-FA41 2M is designated as REACH Affected. E3X-HD41 2M is designated as REACH Unaffected. Regulatory requirements for your application region should determine which substitute is appropriate.