KEMET UB2-3NU-L General Purpose Relay DPDT 1A 3V Equivalent & Substitute Parts

Part Overview

The KEMET UB2-3NU-L is a general purpose relay with DPDT (2 Form C) contact configuration, rated for 1 A at 3VDC coil voltage. This surface mount relay is designed for applications requiring dual-pole, dual-throw switching functionality with non-latching operation. The part is Active in product status and ROHS3 compliant. Equivalent and substitute parts are identified based on identical electrical performance parameters and compatible mechanical specifications, enabling component interchangeability for procurement flexibility and supply chain continuity.

Substiute Parts

UB2-3NU-L

KEMETIn Stock: 3720UB2-3NU-L Datasheet

Current PartRFQ

EB2-3NU-L

KEMETIn Stock: 65012EB2-3NU-L Datasheet

Parametric EquivalentRFQ

UB2-3NUN-L

KEMETIn Stock: 1344UB2-3NUN-L Datasheet

Parametric EquivalentRFQ

UD2-3NU-L

KEMETIn Stock: 3255UD2-3NU-L Datasheet

Parametric EquivalentRFQ

UD2-3NUN-L

KEMETIn Stock: 2085UD2-3NUN-L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UB2-3NU-L relay is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters must remain identical for functional interchangeability:

Electrical Parameters (Non-Negotiable):

• Contact Form: DPDT (2 Form C)
• Contact Rating (Current): 1 A
• Coil Voltage: 3VDC
• Switching Voltage: 250VAC, 220VDC - 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
• Operating Temperature: -40°C ~ 85°C
• Contact Material: Silver Alloy, Gold Alloy

Mechanical Parameters (Non-Negotiable):

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

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

All identified substitute parts meet these criteria. Packaging format (Tape & Reel or Cut Tape) differs among substitutes but does not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts are functionally equivalent to the UB2-3NU-L and are suitable for direct replacement in applications requiring a 3VDC DPDT general purpose relay with 1 A contact rating. Selection among the substitute options should be based on the following criteria:

Packaging Availability:

• UB2-3NU-L and UD2-3NU-L are supplied in Tape & Reel (TR) format, suitable for automated assembly processes.
• EB2-3NU-L is supplied in Cut Tape (CT) & Digi-Reel® format, offering flexibility for mixed-volume procurement.
• UB2-3NUN-L and UD2-3NUN-L are supplied in Cut Tape (CT) format for manual or semi-automated assembly.

Inventory Availability:

• EB2-3NU-L: 64,940 Pcs in stock (highest availability)
• UB2-3NU-L: 3,664 Pcs in stock
• UD2-3NU-L: 3,209 Pcs in stock
• UB2-3NUN-L: 1,292 Pcs in stock
• UD2-3NUN-L: 2,000 Pcs in stock

Compliance Status: All substitute parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for electronics manufacturing and distribution.

Product Status: All substitute parts maintain Active product status, ensuring continued availability and manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can EB2-3NU-L replace UB2-3NU-L in my circuit?

A: Yes. The EB2-3NU-L is a parametric equivalent with identical electrical specifications (3VDC coil, 1 A contact rating, DPDT configuration, 64.3 Ohm coil resistance, 46.7 mA coil current) and mechanical specifications (surface mount, gull wing termination). The only difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel).

Q: What is the difference between UB2-3NUN-L and UB2-3NU-L?

A: Both parts are from the UB2 series with identical electrical and mechanical specifications. The difference is packaging: UB2-3NU-L is supplied in Tape & Reel (TR) format, while UB2-3NUN-L is supplied in Cut Tape (CT) format. Electrical performance is identical.

Q: Are UD2 series relays compatible with UB2 series relays?

A: Yes. UD2-3NU-L and UD2-3NUN-L are parametric equivalents to the UB2-3NU-L. All electrical parameters (coil voltage, contact rating, switching voltage, timing, temperature range) and mechanical parameters (surface mount, gull wing termination) are identical. The series designation reflects internal design differences that do not affect functional interchangeability.

Q: Does packaging format affect relay performance?

A: No. Tape & Reel (TR), Cut Tape (CT), and Digi-Reel® are packaging and delivery formats only. They do not affect electrical performance, contact rating, coil characteristics, or switching behavior. Selection should be based on assembly process requirements and inventory management practices.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts (EB2-3NU-L, UB2-3NUN-L, UD2-3NU-L, UD2-3NUN-L) are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for electronics manufacturing.

Q: Can I use these relays in applications requiring 5VDC coil voltage?

A: No. All identified parts, including the main part UB2-3NU-L, are rated for 3VDC coil voltage only. The must operate voltage is 2.25 VDC and must release voltage is 0.3 VDC. Application of 5VDC would exceed coil specifications and damage the relay.

Q: What is the maximum switching voltage for these relays?

A: All substitute parts are rated for 250VAC or 220VDC maximum switching voltage. This applies to the voltage across the relay contacts during switching operations, not the coil voltage.