EB2-3NU General Purpose Relay DPDT Equivalent & Substitute Parts

Part Overview

The EB2-3NU is a general purpose relay manufactured by KEMET, classified as a Double Pole Double Throw (DPDT) relay with a 1 A contact rating and 3 VDC coil voltage. This surface mount component is designed for applications requiring switching of AC and DC loads with dual independent circuits. The part maintains Active product status with 2462 pieces in current inventory stock.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across all critical operating parameters. Alternative models provide equivalent functionality for applications where the primary part number is unavailable or where design flexibility permits component selection from the same functional category.

Substiute Parts

EB2-3NU

KEMETIn Stock: 2529EB2-3NU Datasheet

Current PartRFQ

UD2-3NU

KEMETIn Stock: 30463UD2-3NU Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the EB2-3NU are identified based on strict electrical and mechanical parameter equivalence. The substitution logic requires that all of the following critical parameters remain identical:

Electrical Parameters (Must Match Exactly):

• Coil Voltage: 3 VDC
• Contact Form: DPDT (2 Form C)
• Contact Rating (Current): 1 A
• Switching Voltage: 250 VAC, 220 VDC - Max
• Coil Current: 46.7 mA
• Coil Resistance: 64.3 Ohms
• Must Operate Voltage: 2.25 VDC
• Must Release Voltage: 0.3 VDC
• Operate Time: 2 ms
• Release Time: 1 ms

Mechanical Parameters (Must Match Exactly):

• Mounting Type: Surface Mount
• Termination Style: Gull Wing
• Packaging: Tube

Environmental & Compliance Parameters (Must Match Exactly):

• Operating Temperature Range: -40°C ~ 85°C
• Contact Material: Silver Alloy, Gold Alloy
• Coil Type: Non Latching
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected

The UD2-3NU qualifies as a parametric equivalent substitute because it maintains identical values across all electrical, mechanical, and environmental specifications. The primary distinction is the series designation (UD2 versus EB2), which reflects different product lines within the KEMET relay portfolio while maintaining complete functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Both the EB2-3NU and UD2-3NU maintain Active product status with KEMET, ensuring continued availability and manufacturing support. Both components are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements for industrial and commercial applications.

The EB2-3NU currently maintains 2462 pieces in inventory stock. The UD2-3NU substitute provides significantly higher inventory availability with 30400 pieces in stock, offering supply chain flexibility for high-volume production requirements or extended lead-time mitigation.

Selection between these equivalent parts should be based on:

Inventory Availability: The UD2-3NU provides substantially greater stock depth for immediate fulfillment of large-quantity orders.

Supply Chain Continuity: Both parts are Active status products from the same manufacturer, ensuring long-term component availability and consistent quality standards.

Regulatory Compliance: Both parts satisfy identical compliance requirements (ROHS3, REACH Unaffected), permitting direct substitution in regulated applications without additional qualification.

Electrical Performance: Complete parameter equivalence across all operating characteristics, switching specifications, and thermal performance ensures identical circuit behavior and reliability in end-use applications.

Frequently Asked Questions (FAQ)

Q: Can the UD2-3NU be used as a direct replacement for the EB2-3NU in existing designs?

A: Yes. The UD2-3NU is a parametric equivalent substitute with identical electrical specifications, mechanical configuration, and environmental ratings. All critical parameters including coil voltage, contact form, current rating, switching voltage, timing characteristics, and operating temperature range are identical. Direct substitution is supported without circuit modification.

Q: What is the difference between the EB2 and UD2 series designations?

A: The series designation reflects different product lines within the KEMET relay portfolio. Both series contain general purpose relays with identical electrical and mechanical specifications for the 3 VDC, 1 A DPDT configuration. The series difference does not affect functional performance or compatibility.

Q: Are the contact materials identical between both parts?

A: Yes. Both the EB2-3NU and UD2-3NU utilize Silver Alloy and Gold Alloy contact materials, providing identical electrical conductivity, contact resistance, and switching performance characteristics.

Q: Do both parts meet the same environmental and regulatory standards?

A: Yes. Both parts are ROHS3 Compliant and REACH Unaffected. Both maintain Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling. Both support the identical operating temperature range of -40°C to 85°C.

Q: What is the significance of the coil resistance value of 64.3 Ohms?

A: The coil resistance of 64.3 Ohms is a critical parameter that determines the coil current draw (46.7 mA at 3 VDC) and the power dissipation characteristics of the relay. Identical coil resistance between both parts ensures identical electrical loading on the power supply circuit and identical thermal performance.

Q: Are the operate and release times identical?

A: Yes. Both parts maintain identical operate time of 2 ms and release time of 1 ms. These timing characteristics are critical for applications requiring precise switching synchronization and are fully equivalent between the EB2-3NU and UD2-3NU.

Q: Can these relays be used in both AC and DC switching applications?

A: Yes. Both parts support switching voltage ratings of 250 VAC and 220 VDC maximum, permitting use in applications requiring either AC or DC load switching. The contact material composition (Silver Alloy, Gold Alloy) supports both AC and DC switching without performance degradation.

Q: What does the Must Operate Voltage of 2.25 VDC indicate?

A: The Must Operate Voltage of 2.25 VDC specifies the minimum coil voltage at which the relay is guaranteed to energize and close its contacts. This parameter is identical for both parts, ensuring consistent pull-in behavior across the specified operating range.

Q: What does the Must Release Voltage of 0.3 VDC indicate?

A: The Must Release Voltage of 0.3 VDC specifies the maximum coil voltage at which the relay is guaranteed to de-energize and open its contacts. This parameter is identical for both parts, ensuring consistent drop-out behavior and preventing contact chatter during power cycling.

Q: Are the packaging and termination styles compatible with standard surface mount assembly equipment?

A: Yes. Both parts feature Gull Wing termination style and Tube packaging, which are standard configurations for surface mount assembly processes. The identical termination geometry ensures compatibility with existing pick-and-place equipment and solder reflow profiles.