SN4R7M050ST Equivalent & Substitute Parts

Part Overview

The SN4R7M050ST is a 4.7 µF, 50 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The part operates across a temperature range of -40°C to 85°C with a rated lifetime of 1000 hours at 85°C, serving general-purpose applications requiring stable capacitance and low equivalent series resistance.

Substiute Parts

SN4R7M050ST

Cornell Dubilier Electronics (CDE)In Stock: 666SN4R7M050ST Datasheet

Current PartRFQ

UVP1J4R7MED1TD

NichiconIn Stock: 18610UVP1J4R7MED1TD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN4R7M050ST is determined by the following critical parameters:

Primary Matching Criteria:

• Capacitance value: 4.7 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Mounting type: Through Hole radial configuration (exact match required)
• Lead spacing: 0.098" (2.50 mm) (exact match required)
• Polarization: Bi-Polar (exact match required)
• Operating temperature range: -40°C to 85°C (minimum requirement)
• RoHS compliance: ROHS3 Compliant (regulatory requirement)

Secondary Compatibility Factors:

• Voltage rating: Rated voltage must equal or exceed 50 V
• Physical dimensions: Height and diameter must accommodate PCB layout constraints
• Ripple current capability: Must support application current requirements

The substitute part UVP1J4R7MED1TD (Nichicon UVP series) meets all primary matching criteria with identical capacitance, tolerance, lead spacing, and mounting configuration. The substitute features a higher voltage rating (63 V) and extended lifetime (2000 Hrs @ 85°C), providing enhanced performance margins within the same physical footprint category.

Parameter Comparison

Engineering Selection Recommendations

The UVP1J4R7MED1TD (Nichicon) qualifies as a direct functional substitute for the obsolete SN4R7M050ST (CDE) based on the following engineering criteria:

Electrical Compatibility: All critical electrical parameters align: capacitance (4.7 µF), tolerance (±20%), and operating temperature range (-40°C to 85°C) are identical. The substitute's higher voltage rating (63 V versus 50 V) provides additional safety margin and is fully compatible with circuits designed for 50 V operation. The extended lifetime rating (2000 Hrs @ 85°C versus 1000 Hrs) indicates improved reliability characteristics.

Mechanical Compatibility: Lead spacing (0.098" / 2.50 mm) is identical, ensuring direct PCB footprint compatibility. Physical dimensions show minor increases: diameter increases from 6.00 mm to 6.30 mm, and height increases from 11.00 mm to 12.50 mm. These dimensional changes remain within typical PCB layout tolerances for radial capacitor placement but require verification of available vertical clearance in the target application.

Regulatory Compliance: Both parts maintain ROHS3 compliance, satisfying environmental and regulatory requirements for equivalent substitution.

Ripple Current Consideration: The substitute exhibits lower ripple current capability (34 mA @ 120 Hz versus 41 mA). Applications requiring the full 41 mA ripple current capacity must evaluate whether the 34 mA rating of the substitute meets circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the UVP1J4R7MED1TD directly replace the SN4R7M050ST on existing PCBs?

A: Yes, for most applications. The lead spacing and mounting type are identical. However, verify that the increased height (12.50 mm versus 11.00 mm) does not interfere with adjacent components or enclosure constraints. The slightly larger diameter (6.30 mm versus 6.00 mm) is typically accommodated by standard radial capacitor footprints.

Q: Why is the substitute's voltage rating higher (63 V versus 50 V)?

A: Higher voltage ratings in aluminum electrolytic capacitors do not create compatibility issues in lower-voltage applications. A 63 V capacitor operates safely in a 50 V circuit and provides additional voltage stress margin, improving reliability. This is a standard engineering practice for component substitution.

Q: Does the lower ripple current rating (34 mA versus 41 mA) affect compatibility?

A: Compatibility depends on the actual ripple current requirement of the application. If the circuit operates at or below 34 mA ripple current, the substitute is fully compatible. If the application requires the full 41 mA capacity, the substitute may not be suitable. Measure or calculate the actual ripple current in your circuit to determine compatibility.

Q: Are there any packaging differences between these parts?

A: The SN4R7M050ST is supplied in standard inventory format, while the UVP1J4R7MED1TD is available in Cut Tape (CT) packaging. Both are through-hole radial capacitors in can packages. Packaging format does not affect electrical or mechanical compatibility; it only affects handling and assembly processes.

Q: What is the significance of the extended lifetime rating (2000 Hrs @ 85°C)?

A: The substitute's 2000-hour lifetime at 85°C versus the original's 1000 hours indicates superior capacitor construction and materials. This extended rating provides longer operational life under thermal stress, reducing the probability of capacitor failure in high-temperature environments. This is a performance advantage with no compatibility concerns.

Q: Are both parts RoHS compliant?

A: Yes. Both the SN4R7M050ST and UVP1J4R7MED1TD are ROHS3 compliant, meeting environmental and regulatory requirements for lead-free and restricted substance compliance.

Q: Can I use the UVP1J4R7MED1TD in applications requiring bi-polar operation?

A: Yes. The UVP1J4R7MED1TD maintains bi-polar polarization, identical to the original part. Both capacitors support bi-polar circuit configurations.