KEMET UB2-4.5NU General Purpose Relay DPDT Equivalent & Substitute Parts

Part Overview

The KEMET UB2-4.5NU is a general purpose relay with DPDT (2 Form C) contact configuration, rated for 1 A at 4.5 VDC coil voltage. This surface mount relay is designed for applications requiring dual-pole, dual-throw switching functionality with non-latching operation. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same relay category, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

UB2-4.5NU

KEMETIn Stock: 5669UB2-4.5NU Datasheet

Current PartRFQ

UD2-4.5NU

KEMETIn Stock: 8975UD2-4.5NU Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UB2-4.5NU are identified based on strict electrical and mechanical parameter equivalence within the general purpose relay category. The substitution criteria are:

Critical Parameters for Substitution:

• Coil voltage: 4.5 VDC
• Contact configuration: DPDT (2 Form C)
• Contact current rating: 1 A
• Switching voltage capability: 250 VAC, 220 VDC maximum
• Coil current draw: 31 mA
• Mounting type: Surface mount
• Termination style: Gull wing
• Operating temperature range: -40°C ~ 85°C
• Coil resistance: 145 Ohms
• Operate/release timing: 2 ms / 1 ms
• Contact material composition: Silver Alloy, Gold Alloy

The KEMET UD2-4.5NU meets all specified parameters and is classified as a parametric equivalent. Both parts share identical electrical performance characteristics, mechanical dimensions, and environmental ratings, enabling direct substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The KEMET UD2-4.5NU is a direct parametric equivalent to the UB2-4.5NU. Both parts are manufactured by KEMET, maintain active production status, and carry identical ROHS3 compliance and REACH unaffected certifications. Selection between these parts is based on availability and inventory considerations rather than technical performance differences.

The UD2-4.5NU series currently maintains higher inventory availability (8911 pcs) compared to the UB2-4.5NU series (5646 pcs), making it suitable for applications where supply continuity is a consideration. Both parts satisfy identical electrical specifications, mechanical requirements, and environmental operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the UD2-4.5NU replace the UB2-4.5NU in existing circuit designs?

A: Yes. The UD2-4.5NU is a parametric equivalent with identical coil voltage (4.5 VDC), contact configuration (DPDT), current rating (1 A), switching voltage capability (250 VAC, 220 VDC), coil resistance (145 Ohms), and operating temperature range (-40°C ~ 85°C). Direct substitution is supported without circuit modification.

Q: Are there differences in package dimensions between UB2-4.5NU and UD2-4.5NU?

A: Both parts share identical mounting type (surface mount) and termination style (gull wing). Package dimensions are equivalent for PCB layout purposes.

Q: What is the significance of the series designation change from UB2 to UD2?

A: The series designation identifies the product line within KEMET's relay portfolio. Both UB2 and UD2 series maintain identical electrical and mechanical specifications for the 4.5V DPDT configuration, indicating they are functionally interchangeable variants.

Q: Do both parts meet the same compliance standards?

A: Yes. Both UB2-4.5NU and UD2-4.5NU are ROHS3 compliant and REACH unaffected, with MSL 1 (unlimited) moisture sensitivity rating.

Q: What are the critical operating parameters that must match for substitution?

A: Critical parameters include coil voltage (4.5 VDC), contact form (DPDT), contact current rating (1 A), coil current (31 mA), coil resistance (145 Ohms), operate time (2 ms), and release time (1 ms). All parameters are identical between the main part and substitute.