Omron D4GL-4DFG-A-NPT Interlock Solenoid Locking Switch - Equivalent & Substitute Parts

Part Overview

The Omron D4GL-4DFG-A-NPT is an interlock solenoid locking switch designed for panel disconnect applications with dual-pole, single-throw normally closed (DPST-NC x 2) circuit configuration. This component operates at 24VDC supply voltage with 240VAC switching capability and provides 102kgf holding force. The product is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility for ongoing system support and new installations.

Substiute Parts

D4GL-4DFG-A-NPT

Omron Automation and SafetyIn Stock: 805D4GL-4DFG-A-NPT Datasheet

Current PartRFQ

D4SL-N3DFG

Omron Automation and SafetyIn Stock: 1109D4SL-N3DFG Datasheet

SimilarRFQ

D4SL-N3DFG-N

Omron Automation and SafetyIn Stock: 747D4SL-N3DFG-N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete D4GL-4DFG-A-NPT is determined by equivalence across the following critical parameters:

Functional Equivalence Criteria:

• Solenoid locking switch type with panel disconnect actuator
• DPST-NC x 2 circuit configuration
• Screw terminal termination style
• IP67 ingress protection rating
• Operating temperature range compatibility (-10°C ~ 55°C)
• Moisture sensitivity level 1 (Unlimited)

Electrical Compatibility Considerations:

• Supply voltage: 24VDC (main part) vs. 120VAC/125VDC (substitute parts) — substitutes operate at different supply voltages
• Switching voltage: 240VAC (main part) vs. 120VAC (substitute parts) — substitutes have reduced switching voltage capability
• Current rating: 750mA AC (main part) vs. 1.5A AC / 220mA DC (substitute parts) — substitutes provide higher AC current capacity
• Holding force: 102kgf (main part) vs. 133kgf (substitute parts) — substitutes provide increased holding force

Mechanical Compatibility:

• Conduit thread size: M20 (main part) vs. 1/2" NPT (substitute parts) — different thread standards require adapter consideration
• Actuator type and termination style remain consistent across all parts

The D4SL-N series substitutes (D4SL-N3DFG and D4SL-N3DFG-N) maintain functional equivalence in circuit topology, protection rating, and environmental specifications while offering enhanced electrical performance and active product status.

Parameter Comparison

Engineering Selection Recommendations

Active Product Status Advantage: Both D4SL-N3DFG and D4SL-N3DFG-N are classified as active products, ensuring continued manufacturer support, availability, and compliance with current regulatory standards. The obsolete status of the D4GL-4DFG-A-NPT creates supply chain risk and limits access to technical documentation updates.

Compliance and Certification: The substitute parts carry expanded approval agency certifications (CCC, CE, cURus, TUV) compared to the original part (CE, cULus, TUV), providing broader regulatory acceptance across international markets. Both substitutes maintain EAR99 ECCN classification with defined HTSUS codes (8536.50.9055), facilitating customs and export compliance documentation.

Electrical Performance Considerations: Substitutes provide enhanced electrical capacity (1.5A AC vs. 750mA AC) and increased holding force (133kgf vs. 102kgf). However, supply voltage differs (120VAC/125VDC vs. 24VDC), requiring circuit redesign or power supply modification. Switching voltage is reduced (120VAC vs. 240VAC), necessitating load analysis to confirm compatibility with existing switching applications.

Mechanical Interface: Conduit thread size differs between the original part (M20) and substitutes (1/2" NPT). System integration requires either mechanical adapter specification or enclosure redesign to accommodate the different thread standard.

Packaging and Inventory: Both substitute parts are available in bulk packaging with substantial inventory levels (1048 Pcs and 732 Pcs respectively), supporting production requirements and reducing lead time risk compared to obsolete part sourcing.

Frequently Asked Questions (FAQ)

Q: Can D4SL-N3DFG and D4SL-N3DFG-N be used interchangeably as substitutes for D4GL-4DFG-A-NPT?

A: Both D4SL-N series parts maintain identical electrical specifications, circuit configuration, and environmental ratings. They differ only in packaging designation (bulk vs. bulk with suffix notation). Selection between them depends on procurement and inventory management requirements rather than functional compatibility.

Q: What is the impact of different supply voltages on system integration?

A: The original part operates at 24VDC supply, while substitutes require 120VAC or 125VDC supply. This difference necessitates modification to the control circuit power supply or addition of a voltage converter. Load analysis must confirm that the system's power distribution infrastructure can accommodate the substitute's voltage requirements.

Q: How does the reduced switching voltage of substitutes affect load compatibility?

A: The original part switches 240VAC loads, while substitutes are rated for 120VAC switching. Applications requiring 240VAC switching capability must either use the original part or redesign the load circuit to operate at 120VAC. Current capacity (1.5A AC for substitutes vs. 750mA AC for original) may permit higher load power at the reduced voltage.

Q: What mechanical modifications are required due to conduit thread size differences?

A: The original part uses M20 conduit threads, while substitutes use 1/2" NPT threads. Integration requires either specification of an M20-to-1/2" NPT adapter or modification of the enclosure mounting interface. Thread compatibility must be verified during mechanical design review.

Q: Are the substitute parts suitable for applications requiring the original part's 102kgf holding force specification?

A: Substitutes provide 133kgf holding force, exceeding the original specification. Applications designed for 102kgf holding force will function with substitutes. However, applications with mechanical constraints or load calculations based on the original 102kgf specification should be reviewed to ensure the increased holding force does not create interference or binding conditions.

Q: What compliance advantages do the substitute parts offer?

A: Substitutes carry CCC certification in addition to CE, cURus, and TUV approvals, providing broader regulatory acceptance. Active product status ensures ongoing compliance with evolving standards and availability of updated technical documentation. The original part's obsolete status limits access to current compliance information and manufacturer support.

Q: How does inventory availability compare between the original and substitute parts?

A: The original D4GL-4DFG-A-NPT (738 Pcs) is classified as obsolete with limited remaining stock. Substitutes D4SL-N3DFG (1048 Pcs) and D4SL-N3DFG-N (732 Pcs) are active products with substantially higher inventory levels, reducing procurement lead time and supply chain risk for ongoing production requirements.