D4NS-3AF Equivalent & Substitute Parts

Part Overview

The D4NS-3AF is an Omron Automation and Safety interlock non-locking switch designed for panel disconnect applications. This DPST-NO/NC switch operates at 3A AC with a 240VAC rating and provides IP67 ingress protection suitable for dust-tight and waterproof environments. The part is currently listed as obsolete, making identification of compatible substitute components essential for system maintenance and replacement planning. The D4NS series remains actively supported through current production variants that maintain functional equivalence while offering improved availability.

Substiute Parts

D4NS-3AF

Omron Automation and SafetyIn Stock: 1131D4NS-3AF Datasheet

Current PartRFQ

D4NS-4AF-NPT

Omron Automation and SafetyIn Stock: 1219D4NS-4AF-NPT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The D4NS-4AF-NPT qualifies as a direct substitute for the D4NS-3AF based on the following electrical and mechanical equivalence criteria:

Electrical Parameters (Identical):

• Circuit configuration: DPST-NO/NC
• Current rating: 3A (AC)
• Voltage rating: 240VAC
• Holding force: 6kgf
• Operating temperature range: -30°C ~ 70°C
• Ingress protection: IP67 - Dust Tight, Waterproof
• Approval agencies: CCC, CE, cULus, TUV
• Moisture sensitivity level: 1 (Unlimited)

Mechanical Parameters (Identical):

• Actuator type: Panel Disconnect
• Termination style: Screw Terminal
• Series: D4NS
• Type: Non-Locking

Distinguishing Characteristics:

• Conduit thread size: D4NS-3AF uses 1/2" NPT; D4NS-4AF-NPT uses M20
• Product status: D4NS-3AF is obsolete; D4NS-4AF-NPT is active production
• Packaging: D4NS-3AF uses standard packaging; D4NS-4AF-NPT is supplied in bulk

The substitution is valid where the M20 conduit thread specification is compatible with the installation environment.

Parameter Comparison

Engineering Selection Recommendations

The D4NS-4AF-NPT is the designated substitute for the obsolete D4NS-3AF. Both components maintain identical electrical and mechanical specifications across all critical parameters: circuit configuration, current and voltage ratings, holding force, operating temperature range, ingress protection rating, and regulatory approvals.

Selection of the D4NS-4AF-NPT is appropriate when:

• The installation environment accommodates M20 conduit thread specification
• Active production availability is required
• RoHS compliance is mandated by system requirements
• Bulk packaging aligns with procurement strategy

The primary consideration for substitution is the conduit thread specification change from 1/2" NPT to M20. This difference requires verification against the installation mounting interface to ensure mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the D4NS-4AF-NPT directly replace the D4NS-3AF in existing installations?

A: Electrical and functional replacement is direct. The conduit thread specification differs (1/2" NPT versus M20), requiring assessment of the mounting interface compatibility before installation.

Q: What are the key electrical parameters that define substitution eligibility?

A: Circuit configuration (DPST-NO/NC), current rating (3A AC), voltage rating (240VAC), holding force (6kgf), operating temperature range (-30°C ~ 70°C), and ingress protection (IP67) must remain identical. Both parts meet these criteria.

Q: Does the D4NS-4AF-NPT meet the same regulatory approvals as the D4NS-3AF?

A: Yes. Both components carry identical approval certifications: CCC, CE, cULus, and TUV. The D4NS-4AF-NPT additionally provides RoHS compliance.

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

A: The D4NS-3AF is obsolete, indicating discontinued production. The D4NS-4AF-NPT is in active production, ensuring long-term availability and supply chain reliability for new installations and replacements.

Q: Are there packaging differences between these parts?

A: The D4NS-3AF uses standard packaging, while the D4NS-4AF-NPT is supplied in bulk packaging. Packaging selection should align with procurement volume and inventory management requirements.

Q: What is the moisture sensitivity level, and does it affect substitution?

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity constraints during storage or handling. This parameter is identical and does not impact substitution decisions.