KEMET UB2-3NU General Purpose Relay DPDT Equivalent & Substitute Parts

Part Overview

The KEMET UB2-3NU is a general purpose relay with DPDT (Double Pole Double Throw) contact configuration, rated for 1A at 3VDC coil voltage. This surface mount relay is designed for applications requiring non-latching switching functionality with dual independent contact sets. The part is Active in product status and maintains full RoHS3 compliance with unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or equivalent performance specifications across the relay series.

Substiute Parts

UB2-3NU

KEMETIn Stock: 3421UB2-3NU Datasheet

Current PartRFQ

UD2-3NU

KEMETIn Stock: 30463UD2-3NU Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the KEMET UB2-3NU are identified based on electrical and mechanical parameter equivalence. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Coil Voltage: 3VDC
• Contact Form: DPDT (2 Form C)
• Contact Rating (Current): 1 A
• Switching Voltage: 250VAC, 220VDC - Max
• Coil Current: 46.7 mA
• Coil Type: Non Latching
• Mounting Type: Surface Mount
• Termination Style: Gull Wing
• Operating Temperature Range: -40°C ~ 85°C
• Contact Material: Silver Alloy, Gold Alloy
• 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
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The KEMET UD2-3NU qualifies as a parametric equivalent substitute, sharing identical electrical specifications, mechanical configuration, and compliance certifications with the primary part number.

Parameter Comparison

Engineering Selection Recommendations

Both the KEMET UB2-3NU and KEMET UD2-3NU are Active products with full RoHS3 compliance and REACH Unaffected status. The parts are electrically and mechanically identical across all specified parameters, including coil voltage, contact configuration, current ratings, switching voltage, timing characteristics, and operating temperature range.

Selection between these part numbers is based on availability and supply chain requirements. The UD2-3NU series maintains higher inventory levels (30,400 pieces) compared to the UB2-3NU (3,364 pieces), making it suitable for applications where extended lead times or bulk procurement are considerations.

Both parts meet identical compliance requirements and are suitable for direct substitution in applications requiring 3VDC DPDT general purpose relays with 1A contact rating and surface mount gull wing termination.

Frequently Asked Questions (FAQ)

Q: Are the UB2-3NU and UD2-3NU electrically interchangeable?

A: Yes. Both parts share identical electrical specifications including coil voltage (3VDC), contact form (DPDT), current rating (1A), switching voltage (250VAC/220VDC), coil current (46.7 mA), and timing characteristics (2 ms operate, 1 ms release).

Q: Do these relays have the same physical footprint?

A: Yes. Both parts use surface mount packaging with gull wing termination style, enabling direct PCB layout compatibility.

Q: What is the difference between the UB2 and UD2 series designations?

A: The series designation reflects internal product line organization within KEMET. Both series maintain identical performance specifications for this 3VDC DPDT relay configuration.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the UB2-3NU and UD2-3NU are ROHS3 Compliant with REACH Unaffected status.

Q: What is the moisture sensitivity level for these relays?

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Can these relays operate below 3VDC?

A: Yes. The must operate voltage is 2.25 VDC, allowing operation at reduced coil voltages. The must release voltage is 0.3 VDC.

Q: What contact materials are used in these relays?

A: Both parts use Silver Alloy and Gold Alloy contact materials for reliable switching performance.

Q: Are these relays latching or non-latching?

A: Both are non-latching relays, requiring continuous coil energization to maintain contact closure.