SS4R7M063ST Equivalent & Substitute Parts Reference

Part Overview

The SS4R7M063ST is a 4.7 µF, 63 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, indicating discontinued production and limited availability in the market. The SS series represents an earlier product line that has been superseded by newer alternatives. Identifying equivalent substitute parts is essential for design continuity, procurement planning, and system reliability when original stock becomes depleted.

Substiute Parts

SS4R7M063ST

Cornell Dubilier Electronics (CDE)In Stock: 1203SS4R7M063ST Datasheet

Current PartRFQ

SK4R7M063ST

Cornell Dubilier Electronics (CDE)In Stock: 10131SK4R7M063ST Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SS4R7M063ST are identified based on strict electrical and mechanical parameter matching within the aluminum electrolytic capacitor category. The substitution logic is governed by the following critical parameters:

Electrical Parameters (Non-negotiable):

• Capacitance value: 4.7 µF (exact match required)
• Voltage rating: 63 V (substitute must equal or exceed)
• Tolerance: ±20% (substitute tolerance must be equal or tighter)
• Polarization: Polar (must remain polar)

Mechanical Parameters (Non-negotiable):

• Mounting type: Through Hole (PCB assembly method must match)
• Package type: Radial, Can (physical form factor must match)
• Lead spacing: 0.098" (2.50mm) (PCB hole pattern compatibility)

Environmental & Compliance Parameters:

• Operating temperature range: -40°C ~ 85°C (must support or exceed)
• RoHS Status: ROHS3 Compliant (regulatory requirement)

The SK4R7M063ST qualifies as a direct substitute because it maintains identical electrical specifications (4.7 µF, 63 V, ±20%), identical polarization (polar), identical mounting type (through hole), identical package type (radial, can), and identical operating temperature range. Both components are ROHS3 compliant. The SK series represents the active production equivalent to the obsolete SS series from the same manufacturer.

Parameter Comparison

Engineering Selection Recommendations

The SK4R7M063ST is the direct substitute for the obsolete SS4R7M063ST based on electrical and compliance equivalence. Selection criteria are as follows:

Primary Consideration - Product Status: The SS4R7M063ST is obsolete with limited remaining inventory (1104 pcs). The SK4R7M063ST is active production with substantial availability (10084 pcs), ensuring long-term procurement viability and supply chain continuity.

Electrical Equivalence: Both parts maintain identical capacitance (4.7 µF), voltage rating (63 V), tolerance (±20%), and operating temperature range (-40°C ~ 85°C). Electrical performance is functionally equivalent for general-purpose applications.

Regulatory Compliance: Both components are ROHS3 compliant, meeting current environmental and hazardous substance restrictions. No compliance barriers exist for substitution.

Performance Enhancement: The SK4R7M063ST demonstrates superior performance characteristics: doubled lifetime rating (2000 Hrs vs. 1000 Hrs @ 85°C), increased ripple current capacity (45 mA @ 120 Hz vs. 33 mA; 58.5 mA @ 1 kHz vs. 37.95 mA), and comparable ESR (25.41 Ohm vs. 22.59 Ohm @ 120Hz). These improvements provide enhanced reliability margins.

Physical Compatibility Consideration: Lead spacing differs (0.079" vs. 0.098") and physical dimensions vary (smaller diameter and greater height in substitute). PCB hole pattern compatibility must be verified before implementation. If the original PCB is designed specifically for the SS4R7M063ST lead spacing and dimensions, mechanical adaptation may be required.

Recommendation: Use SK4R7M063ST as the primary substitute for new designs and ongoing production. For existing PCB layouts with fixed hole patterns, verify mechanical fit before component selection. The superior performance characteristics and active production status justify substitution where physical constraints permit.

Frequently Asked Questions (FAQ)

Q1: Can the SK4R7M063ST be used as a direct drop-in replacement for the SS4R7M063ST?

A: Electrical substitution is direct and complete. However, physical substitution requires verification. The SK4R7M063ST has different lead spacing (0.079" vs. 0.098") and different physical dimensions (smaller diameter 0.197" vs. 0.248", but taller at 0.512" vs. 0.276"). If your PCB is designed for the original SS4R7M063ST footprint, the SK4R7M063ST may not fit without PCB modification or mechanical adaptation.

Q2: Why are the physical dimensions different if both are 4.7 µF 63V radial capacitors?

A: Different manufacturers and product series optimize internal construction differently. The SK series achieves superior performance (doubled lifetime, higher ripple current) through different internal design, resulting in different external dimensions. Both meet the same electrical specifications but use different physical implementations.

Q3: Is the SK4R7M063ST more reliable than the SS4R7M063ST?

A: The SK4R7M063ST demonstrates superior reliability metrics: 2000 Hrs lifetime at 85°C versus 1000 Hrs, and higher ripple current ratings (45 mA @ 120 Hz vs. 33 mA). These are objective performance improvements, not subjective reliability claims. Both are ROHS3 compliant.

Q4: What does the different ESR value mean for my application?

A: ESR (Equivalent Series Resistance) is 25.41 Ohm for SK4R7M063ST versus 22.59 Ohm for SS4R7M063ST. The difference is approximately 12% higher in the substitute. For general-purpose applications, this difference is negligible. For high-frequency or noise-sensitive circuits, verify that the slightly higher ESR remains acceptable for your specific application requirements.

Q5: Can I use the SK4R7M063ST in a space-constrained application where the original SS4R7M063ST barely fits?

A: No. The SK4R7M063ST is taller (0.512" vs. 0.276") and has a smaller diameter (0.197" vs. 0.248"). If vertical space is limited, the substitute will not fit. If horizontal space is limited, the substitute may fit better due to smaller diameter. Measure your available space carefully before selection.

Q6: Are there any other CDE substitutes for the SS4R7M063ST?

A: Based on the provided data, SK4R7M063ST is the identified substitute. Other alternatives may exist in the market, but only SK4R7M063ST is documented as an equivalent from the same manufacturer with matching electrical specifications and compliance status.

Q7: What is the lead spacing and why does it matter?

A: Lead spacing is the distance between the two leads (pins) of the capacitor. SS4R7M063ST has 0.098" (2.50mm) spacing; SK4R7M063ST has 0.079" (2.00mm) spacing. This matters because PCBs are manufactured with specific hole patterns. If your PCB holes are 2.50mm apart, the 2.00mm spacing substitute will not align properly without PCB rework.

Q8: Both parts are ROHS3 compliant. Does this guarantee they are interchangeable?

A: ROHS3 compliance indicates both parts meet environmental and hazardous substance restrictions, which is necessary for regulatory acceptance. However, compliance alone does not guarantee interchangeability. Electrical parameters (capacitance, voltage, tolerance) and physical parameters (lead spacing, dimensions, mounting type) must also match or be compatible.

Q9: The SK4R7M063ST has higher ripple current ratings. Should I always choose it over the SS4R7M063ST?

A: Higher ripple current ratings provide performance margin and are generally beneficial. However, the primary driver for substitution is that SS4R7M063ST is obsolete. If SS4R7M063ST were still in production, the choice would depend on application requirements, cost, and availability. Since it is obsolete, SK4R7M063ST is the necessary choice for ongoing supply.

Q10: What should I do if the SK4R7M063ST does not fit my existing PCB?

A: Verify the exact hole spacing and available vertical clearance on your PCB. If dimensions are incompatible, options include: (1) redesign the PCB to accommodate the SK4R7M063ST footprint, (2) use mechanical adapters or spacers if feasible, or (3) consult with CDE or authorized distributors for alternative part numbers that may better match your original specifications. Do not force a component into an incompatible footprint.