Equivalent & Substitute Parts for Weidmüller 7940100400

Part Overview

The Weidmüller 7940100400 is a Transient Voltage Suppressor (TVS) device classified as SPD II 120V/40KA, designed for circuit protection applications. This component is currently listed as obsolete, necessitating identification of functionally equivalent alternatives from the active product portfolio. The substitute parts maintain core protective characteristics while offering enhanced features and ongoing manufacturer support.

Substiute Parts

7940100400

WeidmüllerIn Stock: 10117940100400 Datasheet

Current PartRFQ

2730450000

WeidmüllerIn Stock: 10032730450000 Datasheet

MFR RecommendedRFQ

2730460000

WeidmüllerIn Stock: 11382730460000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Two substitute parts are identified based on manufacturer recommendation: 2730450000 and 2730460000. Both alternatives are classified as active products within the Transient Voltage Suppressors category and share the following critical parameters that establish substitution validity:

• Manufacturer: Weidmüller (consistent)
• Category: Transient Voltage Suppressors (TVS), Circuit Protection
• Mounting Type: DIN Rail
• Number of Poles: 1
• Voltage - Continuous Operating (Max) (MCOV): 150V
• Current - Discharge (Nom) (8/20µS): 20 kA
• Current - Discharge (Max) (8/20µS): 50 kA
• Current - Short Circuit Rating (SCRR): 200 kA
• Voltage - Protection Rating (VPR): 600 V
• Operating Temperature Range: -40°C ~ 85°C
• Approval Agency: cULus certification

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts 2730450000 and 2730460000 are manufacturer-recommended alternatives to the obsolete 7940100400. Selection between the two substitutes is determined by application-specific requirements:

2730450000 (VPU AC II US 1 120/50): This part is designated as Type 1 and carries cULus approval. It is suitable for standard circuit protection applications requiring single-pole transient voltage suppression with the specified electrical parameters.

2730460000 (SURGE PROTECTION - OVP): This part is classified as a Surge Protection Module and carries dual certification (cULus and VDE). It includes remote signaling contacts and RoHS3 compliance. This variant is appropriate for applications requiring enhanced monitoring capabilities and extended regulatory compliance.

Both parts maintain identical core electrical performance parameters and DIN Rail mounting compatibility, ensuring functional equivalence in protection rating and discharge capacity.

Frequently Asked Questions (FAQ)

Q: Can 2730450000 and 2730460000 be used interchangeably with 7940100400?

A: Both parts are manufacturer-recommended substitutes with identical electrical protection parameters (150V MCOV, 50 kA maximum discharge current, 600V protection rating). The primary difference is that 2730460000 includes remote signaling contacts and additional certifications (VDE). Selection depends on whether remote monitoring capability is required in the application.

Q: What is the difference between Type 1 and Surge Protection Module classifications?

A: 2730450000 is classified as Type 1, representing a standard transient voltage suppressor configuration. 2730460000 is classified as a Surge Protection Module, indicating an integrated protective device with additional features such as remote signaling contacts for system monitoring.

Q: Are both substitutes DIN Rail mountable?

A: Yes, both 2730450000 and 2730460000 are specified for DIN Rail mounting, maintaining mechanical compatibility with the original 7940100400 installation footprint.

Q: What certifications apply to each substitute?

A: 2730450000 carries cULus approval. 2730460000 carries cULus and VDE approvals, with additional RoHS3 compliance certification.

Q: What is the operating temperature range for the substitute parts?

A: Both substitute parts operate across -40°C to 85°C, providing equivalent thermal performance to the original component.

Q: How do packaging options differ between the substitutes?

A: 2730450000 is supplied in Bulk packaging, while 2730460000 is supplied in Box packaging. This distinction affects inventory management and handling procedures but does not impact electrical or mechanical performance.