Omron D4B-3A71N Equivalent & Substitute Parts

Part Overview

The Omron D4B-3A71N is a snap-action switch with DPST-NC (Double Pole Single Throw - Normally Closed) configuration, rated for 10A AC at 120V and 6A DC at 30V. This component features a roller plunger actuator, chassis mount design, and screw terminal connections with IP67 ingress protection. The D4B-3A71N is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and component sourcing in legacy equipment applications.

Substiute Parts

D4B-3A71N

Omron Automation and SafetyIn Stock: 920D4B-3A71N Datasheet

Current PartRFQ

D4B-2A71N

Omron Automation and SafetyIn Stock: 990D4B-2A71N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The Omron D4B-2A71N qualifies as a direct functional substitute for the D4B-3A71N based on the following critical parameters:

Electrical Equivalence: Both parts maintain identical circuit configuration (DPST-NC), switch function (On-Momentary), current ratings (10A AC / 6A DC), and voltage ratings (120V AC / 30V DC).

Mechanical Compatibility: Both switches feature the same actuator type (roller plunger), mounting configuration (chassis mount), and termination method (screw terminal), ensuring physical and electrical interface compatibility.

Environmental Performance: Both parts share identical ingress protection rating (IP67), operating temperature range (-40°C to 80°C), electrical life (500,000 cycles), and mechanical life (10,000,000 cycles).

Regulatory Compliance: Both parts meet RoHS requirements and carry identical ECCN and HTSUS classifications, confirming regulatory interchangeability.

The primary distinction is product status: D4B-3A71N is obsolete while D4B-2A71N is active, making the latter the recommended sourcing option for new applications and replacements.

Parameter Comparison

Engineering Selection Recommendations

The D4B-2A71N is the appropriate selection for applications currently using or requiring replacement of the D4B-3A71N. The substitute part maintains full electrical and mechanical compatibility across all specified parameters while offering the advantage of active product status and current manufacturing support.

The D4B-2A71N carries ROHS3 compliance, representing current regulatory standards, whereas the D4B-3A71N carries RoHS Compliant designation. Both parts share identical ECCN (EAR99) and HTSUS (8536.50.7000) classifications, confirming export and tariff equivalence.

For legacy equipment maintenance, the D4B-2A71N provides direct functional replacement without circuit redesign or mechanical modification. For new designs, the D4B-2A71N is the specified component from the active D4B-N series.

Frequently Asked Questions (FAQ)

Q: Can the D4B-2A71N directly replace the D4B-3A71N in existing equipment?

A: Yes. Both switches share identical electrical ratings (10A AC at 120V, 6A DC at 30V), circuit configuration (DPST-NC), actuator type (roller plunger), mounting method (chassis mount), and termination style (screw terminal). No circuit modification or mechanical adaptation is required.

Q: What is the significance of the product status difference?

A: The D4B-3A71N is classified as obsolete, indicating discontinued manufacturing and limited availability. The D4B-2A71N is active, ensuring current production, technical support, and reliable long-term sourcing.

Q: Are there packaging differences between these parts?

A: The D4B-3A71N is listed with standard packaging, while the D4B-2A71N is supplied in bulk packaging. Both configurations contain identical electrical and mechanical components.

Q: Do both parts meet current environmental and regulatory standards?

A: Both parts are RoHS compliant. The D4B-2A71N carries ROHS3 designation, representing current regulatory standards. Both share identical ECCN and HTSUS classifications, confirming regulatory interchangeability for export and tariff purposes.

Q: What operational parameters determine substitution eligibility?

A: Substitution is based on matching circuit configuration (DPST-NC), current and voltage ratings (10A AC / 120V AC, 6A DC / 30V DC), actuator type (roller plunger), mounting configuration (chassis mount), termination method (screw terminal), and environmental specifications (IP67, -40°C to 80°C operating range, 500,000 electrical cycles, 10,000,000 mechanical cycles).