UD2-4.5NUN Equivalent & Substitute Parts

Part Overview

The UD2-4.5NUN is a general purpose relay manufactured by KEMET, classified as a DPDT (Double Pole Double Throw) surface mount component with a 4.5VDC coil voltage and 1A contact rating. This relay is designed for applications requiring non-latching switching functionality with dual independent circuits. The part maintains Active product status with full RoHS3 compliance and REACH unaffected classification.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same product series, ensuring direct functional interchangeability without circuit redesign or performance degradation.

Substiute Parts

UD2-4.5NUN

KEMETIn Stock: 1134UD2-4.5NUN Datasheet

Current PartRFQ

UD2-4.5NU

KEMETIn Stock: 8975UD2-4.5NU Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UD2-4.5NUN is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Coil voltage (4.5VDC), contact form (DPDT), contact current rating (1A), switching voltage capability (250VAC/220VDC), coil current draw (31 mA), and coil resistance (145 Ohms) must be identical.

Mechanical Parameters: Mounting type (Surface Mount), termination style (Gull Wing), and package format must match.

Environmental & Compliance Parameters: Operating temperature range (-40°C ~ 85°C), RoHS3 compliance, and REACH unaffected status must be maintained.

Functional Parameters: Non-latching coil type, general purpose relay classification, and timing characteristics (2 ms operate time, 1 ms release time) must be preserved.

Parts meeting all these criteria are classified as parametric equivalents within the UD2 series.

Parameter Comparison

Engineering Selection Recommendations

Both UD2-4.5NUN and UD2-4.5NU are Active status products with identical electrical, mechanical, and environmental specifications. Selection between these parts is based on inventory availability and supply chain considerations rather than technical performance differences.

The UD2-4.5NUN maintains 1044 pieces in current inventory, while the UD2-4.5NU provides 8911 pieces in stock. Both parts carry ROHS3 compliance and REACH unaffected certification, meeting regulatory requirements for industrial and commercial applications.

For applications requiring immediate component availability with extended lead time protection, the UD2-4.5NU offers superior stock depth. For applications with established supply agreements or specific procurement requirements, the UD2-4.5NUN remains a valid selection.

Frequently Asked Questions (FAQ)

Q: Can UD2-4.5NU be used as a direct replacement for UD2-4.5NUN in existing designs?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, coil voltage, contact ratings, switching capabilities, and mechanical form factors. No circuit modifications are required.

Q: What determines substitution eligibility for UD2 series relays?

A: Substitution requires matching coil voltage (4.5VDC), contact form (DPDT), current rating (1A), switching voltage (250VAC/220VDC), mounting type (Surface Mount), termination style (Gull Wing), and operating temperature range (-40°C ~ 85°C).

Q: Are there differences in contact material or reliability between these parts?

A: No. Both parts use identical Silver Alloy and Gold Alloy contact materials with matching coil resistance (145 Ohms) and timing characteristics (2 ms operate, 1 ms release).

Q: Do both parts meet the same compliance standards?

A: Yes. Both UD2-4.5NUN and UD2-4.5NU are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (Unlimited moisture sensitivity level).

Q: What is the significance of the part number suffix difference between UD2-4.5NUN and UD2-4.5NU?

A: The suffix difference reflects packaging or internal configuration variations within the UD2 series. Electrical and mechanical performance parameters remain identical, confirming full interchangeability.

Q: Can these relays be used interchangeably in high-frequency switching applications?

A: Application suitability depends on circuit requirements beyond the provided parameters. Both parts maintain identical operate time (2 ms) and release time (1 ms) specifications.