D4BS-3AFS Equivalent & Substitute Parts

Part Overview

The D4BS-3AFS is an Omron Automation and Safety interlock non-locking switch with DPST-NC circuit configuration. This panel disconnect switch is rated for 10A AC at 120VAC and features IP67 ingress protection with screw terminal connections. The product is currently obsolete, making identification of compatible substitute parts essential for system maintenance and component replacement in existing installations.

Substiute Parts

D4BS-3AFS

Omron Automation and SafetyIn Stock: 1225D4BS-3AFS Datasheet

Current PartRFQ

D4BS-4AFSNPT

Omron Automation and SafetyIn Stock: 1107D4BS-4AFSNPT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The D4BS-3AFS can be substituted with the D4BS-4AFSNPT based on the following electrical and mechanical compatibility criteria:

Matching Parameters (Substitution Basis):

• Same manufacturer series (D4BS)
• Identical circuit configuration (DPST-NC)
• Identical current rating (10A AC)
• Identical voltage rating (120VAC)
• Identical holding force (2kgf)
• Identical actuator type (Panel Disconnect)
• Identical termination style (Screw Terminal)
• Identical operating temperature range (-40°C ~ 80°C)
• Identical ingress protection rating (IP67)
• Identical approval agencies (CE, CSA, UL)
• Identical moisture sensitivity level (1 - Unlimited)

Differing Parameter:

• Conduit thread size: D4BS-3AFS uses 1/2" NPT; D4BS-4AFSNPT uses M20

The D4BS-4AFSNPT is an active product variant within the same D4BS series, providing functional equivalence with updated thread specification.

Parameter Comparison

Engineering Selection Recommendations

The D4BS-4AFSNPT is the direct substitute for the obsolete D4BS-3AFS. Both components maintain identical electrical specifications, mechanical performance characteristics, and regulatory compliance across CE, CSA, and UL certifications. The primary distinction is the conduit thread specification: the substitute uses M20 metric threading instead of the 1/2" NPT specification of the original part.

Selection of the D4BS-4AFSNPT is appropriate when the installation environment accommodates M20 conduit connections. The active product status of the D4BS-4AFSNPT ensures ongoing availability and supply chain continuity compared to the obsolete D4BS-3AFS.

Frequently Asked Questions (FAQ)

Q: What makes the D4BS-4AFSNPT a valid substitute for the D4BS-3AFS?

A: Both parts share identical electrical ratings (10A AC, 120VAC), circuit configuration (DPST-NC), mechanical specifications (2kgf holding force, panel disconnect actuator), environmental protection (IP67), and regulatory approvals (CE, CSA, UL). The D4BS-4AFSNPT is an active product variant within the same D4BS series.

Q: What is the key difference between these two parts?

A: The conduit thread size differs. The D4BS-3AFS uses 1/2" NPT threading, while the D4BS-4AFSNPT uses M20 metric threading. This difference affects only the conduit connection interface and does not impact electrical or switching performance.

Q: Can I use the D4BS-4AFSNPT if my installation requires 1/2" NPT connections?

A: Direct installation is not possible without an adapter. The M20 metric thread of the D4BS-4AFSNPT is not compatible with 1/2" NPT conduit fittings. An appropriate thread adapter would be required for mechanical integration.

Q: Why is the D4BS-3AFS listed as obsolete?

A: The D4BS-3AFS is no longer in active production. The D4BS-4AFSNPT represents the current active variant within the D4BS interlock switch series.

Q: Are there any differences in packaging between these parts?

A: The D4BS-3AFS is packaged individually, while the D4BS-4AFSNPT is supplied in bulk packaging. Both maintain identical component specifications and performance characteristics.