MT331220 General Purpose Relay 3PDT 10A 220VDC Equivalent & Substitute Parts

Part Overview

The MT331220 is a general purpose relay manufactured by TE Connectivity Potter & Brumfield Relays, featuring a 3PDT (3 Form C) contact configuration with a 220VDC coil. This socketable relay is rated for 10A switching capacity at a maximum of 400VAC and includes a test button for operational verification. The MT331220 is classified as obsolete, making identification of equivalent substitute parts essential for system maintenance and component replacement in existing installations.

Substiute Parts

MT331220

TE Connectivity Potter & Brumfield RelaysIn Stock: 865MT331220 Datasheet

Current PartRFQ

7940007742

WeidmüllerIn Stock: 9837940007742 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MT331220 are identified based on electrical and mechanical parameter equivalence. The following parameters establish substitution compatibility:

Critical Matching Parameters:

• Coil voltage: 220VDC
• Contact form: 3PDT (3 Form C)
• Contact rating: 10 A
• Switching voltage: 400VAC maximum
• Coil current: 5.5 mA
• Termination style: Plug In, 11 Pin (Octal)
• Mounting type: Socketable
• Operating temperature range: -40°C ~ 60°C
• Contact material: Silver Nickel (AgNi)
• Coil resistance: 40 kOhms
• Coil type: Non Latching
• Test button feature

The substitute part Weidmüller 7940007742 meets all specified electrical and mechanical parameters, enabling direct functional replacement in applications requiring the MT331220 relay.

Parameter Comparison

Engineering Selection Recommendations

The Weidmüller 7940007742 relay serves as a direct functional equivalent to the obsolete MT331220. Selection of this substitute is supported by the following factors:

Product Status Consideration: The MT331220 is classified as obsolete, while the Weidmüller 7940007742 maintains active product status, ensuring ongoing availability and supply chain continuity.

Regulatory Compliance: Both relays maintain RoHS compliance and REACH unaffected status, satisfying environmental and regulatory requirements for electronic component deployment.

Electrical and Mechanical Equivalence: All critical parameters including coil voltage, contact configuration, current rating, switching voltage, timing characteristics, and termination style are identical between the two relays, enabling direct substitution without circuit modification.

Availability: The Weidmüller substitute is available in active inventory, providing immediate sourcing capability for replacement applications.

Frequently Asked Questions (FAQ)

Q: Can the Weidmüller 7940007742 be used as a direct replacement for the MT331220 in existing installations?

A: Yes. The Weidmüller 7940007742 is electrically and mechanically equivalent to the MT331220 across all specified parameters. Both relays feature identical 220VDC coil voltage, 3PDT contact configuration, 10A current rating, 11-pin octal socketable termination, and operating characteristics. Direct substitution is supported without circuit modification.

Q: What are the key parameters that determine substitution compatibility for this relay category?

A: Substitution compatibility is determined by matching the following parameters: coil voltage (220VDC), contact form (3PDT), contact current rating (10A), maximum switching voltage (400VAC), coil current (5.5 mA), termination style (11-pin octal plug-in), mounting type (socketable), operating temperature range (-40°C to 60°C), contact material (Silver Nickel), and coil resistance (40 kOhms).

Q: Are there any packaging differences between the MT331220 and the Weidmüller 7940007742?

A: The MT331220 is supplied with standard packaging, while the Weidmüller 7940007742 is supplied in bulk packaging. Both relays are identical in form factor and socketable mounting configuration. Packaging differences do not affect functional compatibility or installation.

Q: Do both relays meet current regulatory compliance standards?

A: Yes. Both the MT331220 and Weidmüller 7940007742 are RoHS compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component use.

Q: What is the significance of the test button feature on these relays?

A: The test button feature enables manual operational verification of the relay without energizing the coil through normal circuit operation. This feature is present on both the MT331220 and the Weidmüller 7940007742, supporting field testing and diagnostics.

Q: How do the timing characteristics compare between these relays?

A: Both relays exhibit identical timing specifications: 15 millisecond operate time and 10 millisecond release time. These characteristics ensure equivalent switching performance in time-sensitive applications.