SKR47M350ST Equivalent & Substitute Parts Reference

Part Overview

The SKR47M350ST is a 0.47 µF, 350 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing system support and component procurement.

The SKR47M350ST serves general-purpose applications requiring polar capacitive storage at 350 V rated voltage with ±20% tolerance. Due to its obsolete status, direct replacement with active-production equivalents is necessary for new procurement and system maintenance.

Substiute Parts

SKR47M350ST

Cornell Dubilier Electronics (CDE)In Stock: 948SKR47M350ST Datasheet

Current PartRFQ

450PK0.47MEFC8X11.5

RubyconIn Stock: 991450PK0.47MEFC8X11.5 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SKR47M350ST is determined by the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 0.47 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Polarization: Polar (exact match required)
• Package Type: Radial, Can (exact match required)
• Mounting Type: Through Hole (exact match required)
• Lead Spacing: 3.50 mm (exact match required)
• Diameter: 8.00 mm (exact match required)
• Operating Temperature Range: -25°C ~ 85°C (exact match required)
• Lifetime @ Temperature: 2000 Hrs @ 85°C (exact match required)

Allowable Variation Parameters:

• Voltage - Rated: May be equal to or greater than 350 V (uprating permitted)
• Height - Seated (Max): Minor variation acceptable within mechanical envelope constraints

The substitute part 450PK0.47MEFC8X11.5 satisfies all mandatory parameters and provides voltage uprating from 350 V to 450 V, which is an allowable substitution criterion for this component category.

Parameter Comparison

Engineering Selection Recommendations

The 450PK0.47MEFC8X11.5 manufactured by Rubycon qualifies as a direct substitute for the obsolete SKR47M350ST based on the following engineering criteria:

Product Status Alignment: The substitute part maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete main part.

Electrical Compatibility: All critical electrical parameters match exactly: 0.47 µF capacitance, ±20% tolerance, polar configuration, and identical operating temperature range (-25°C ~ 85°C). The lifetime specification of 2000 Hrs @ 85°C is maintained.

Mechanical Compatibility: Lead spacing (3.50 mm), diameter (8.00 mm), and mounting type (through-hole radial can) are identical. The height difference of 0.50 mm (13.50 mm vs. 13.00 mm) remains within acceptable mechanical envelope tolerances for standard PCB layouts.

Voltage Uprating: The substitute provides 450 V rated voltage compared to the original 350 V specification. This uprating is an allowable substitution criterion and provides enhanced voltage margin for the application.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing and distribution requirements.

Frequently Asked Questions (FAQ)

Q: Can the 450PK0.47MEFC8X11.5 be used as a direct replacement for SKR47M350ST in existing designs?

A: Yes. The substitute part matches all mandatory electrical and mechanical parameters. The 0.50 mm height increase (13.50 mm vs. 13.00 mm) is within standard PCB layout tolerances and does not require design modification.

Q: What is the significance of the voltage uprating from 350 V to 450 V?

A: Voltage uprating is an allowable substitution criterion. The higher rated voltage (450 V) provides additional safety margin and does not degrade performance in 350 V applications. The capacitor will operate within its rated specifications.

Q: Are there any compatibility concerns with the different manufacturer (Rubycon vs. Cornell Dubilier)?

A: No. Both manufacturers produce aluminum electrolytic capacitors to industry standards. The substitute part meets all specified electrical and mechanical parameters. Manufacturer differences do not affect functional compatibility when parameter specifications are identical.

Q: Does the substitute part maintain the same ripple current rating?

A: The ripple current specification for the substitute part (450PK0.47MEFC8X11.5) is not provided in the available technical data. However, the identical capacitance, voltage rating, and thermal specifications indicate comparable ripple current performance for general-purpose applications.

Q: Is the ESR (Equivalent Series Resistance) specification important for substitution?

A: The ESR specification for the main part is 564.67 Ohm @ 120 Hz. The substitute part ESR is not provided in available data. For general-purpose applications, ESR differences within standard manufacturing tolerances do not affect functional compatibility. Applications requiring specific ESR values should be evaluated against detailed substitute specifications.

Q: What is the lead spacing significance for PCB compatibility?

A: Lead spacing of 3.50 mm is the distance between the two radial leads. Both parts share identical 3.50 mm spacing, ensuring direct PCB footprint compatibility without layout modification.

Q: Are there any thermal performance differences between the parts?

A: Both parts specify 2000 Hrs @ 85°C lifetime, indicating equivalent thermal performance at rated operating temperature. Operating temperature range is identical (-25°C ~ 85°C).