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SXR221M050ST Equivalent & Substitute Parts
Part Overview
The SXR221M050ST is a 220 µF, 50 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, making direct replacement necessary for ongoing production and maintenance applications. The part operates across a temperature range of -40°C to 105°C and is suitable for general-purpose applications requiring polar electrolytic capacitor functionality. Identification of equivalent and substitute parts ensures design continuity and supply chain reliability for systems currently utilizing this component.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Capacitance | 220 | µF |
| Voltage - Rated | 50 | V |
| Tolerance | ±20% | — |
| Operating Temperature Range | -40°C to 105°C | — |
| Polarization | Polar | — |
| Mounting Type | Through Hole | — |
| Package / Case | Radial, Can | — |
| Lead Spacing | 0.197" (5.00mm) | — |
| Size / Dimension | 0.394" Dia (10.00mm) | — |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitution of the SXR221M050ST is determined by strict equivalence across the following critical parameters:
Mandatory Matching Parameters:
- Capacitance: 220 µF (exact match required)
- Voltage Rating: 50 V (exact match required)
- Tolerance: ±20% (exact match required)
- Polarization: Polar (exact match required)
- Mounting Type: Through Hole (exact match required)
- Package / Case: Radial, Can (exact match required)
- Lead Spacing: 0.197" (5.00mm) (exact match required)
- Size / Dimension: 0.394" Dia (10.00mm) (exact match required)
- Operating Temperature Range: -40°C to 105°C (exact match required)
Allowable Variation Parameters:
- ESR (Equivalent Series Resistance): May vary within acceptable operating limits
- Lifetime @ Temperature: May exceed minimum specification
- Ripple Current: May exceed minimum specification
- Impedance: May vary with series design
- Product Status: Active or Last Time Buy acceptable; Obsolete not acceptable for substitution
- Packaging Format: Bulk or Cut Tape acceptable
- RoHS Compliance: ROHS3 Compliant required
All substitute parts listed below satisfy these mandatory matching criteria and represent direct functional equivalents for the SXR221M050ST.
Parameter Comparison
| Part Number | Manufacturer | Capacitance (µF) | Voltage (V) | Tolerance | Lifetime @ 105°C (Hrs) | ESR @ 120Hz | Lead Spacing | Height (Max) | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| SXR221M050ST | Cornell Dubilier Electronics | 220 | 50 | ±20% | 4000 | 600 mOhm | 0.197" (5.00mm) | 0.984" (25.00mm) | Obsolete | ROHS3 Compliant |
| 227KBM050M | Cornell Dubilier / Illinois Capacitor | 220 | 50 | ±20% | 7000 | 753.6 mOhm | 0.197" (5.00mm) | 0.689" (17.50mm) | Active | ROHS3 Compliant |
| 50YXH220MEFC10X16 | Rubycon | 220 | 50 | ±20% | 7000 | — | 0.197" (5.00mm) | 0.689" (17.50mm) | Last Time Buy | ROHS3 Compliant |
| 50YXJ220M10X16 | Rubycon | 220 | 50 | ±20% | 10000 | — | 0.197" (5.00mm) | 0.689" (17.50mm) | Active | ROHS3 Compliant |
| 50YXJ220MCA10X16 | Rubycon | 220 | 50 | ±20% | 10000 | — | 0.197" (5.00mm) | 0.689" (17.50mm) | Active | ROHS3 Compliant |
| 50ZLH220MEFC10X16 | Rubycon | 220 | 50 | ±20% | 10000 | — | 0.197" (5.00mm) | 0.689" (17.50mm) | Active | ROHS3 Compliant |
| 50ZLH220MEFCSZ10X16 | Rubycon | 220 | 50 | ±20% | 10000 | — | 0.197" (5.00mm) | 0.689" (17.50mm) | Active | ROHS3 Compliant |
| 50ZLH220MEFCUA10X16 | Rubycon | 220 | 50 | ±20% | 10000 | — | 0.197" (5.00mm) | 0.689" (17.50mm) | Active | ROHS3 Compliant |
| 50ZLJ220M10X16 | Rubycon | 220 | 50 | ±20% | 10000 | — | 0.197" (5.00mm) | 0.689" (17.50mm) | Active | ROHS3 Compliant |
| EEU-FM1H221 | Panasonic Electronic Components | 220 | 50 | ±20% | 4000 | — | 0.197" (5.00mm) | 0.689" (17.50mm) | Active | ROHS3 Compliant |
| EEU-FM1H221B | Panasonic Electronic Components | 220 | 50 | ±20% | 4000 | — | 0.197" (5.00mm) | 0.689" (17.50mm) | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitutes (Active Status, Extended Lifetime):
The Rubycon 50YXJ220M10X16, 50YXJ220MCA10X16, 50ZLH220MEFC10X16, 50ZLH220MEFCSZ10X16, 50ZLH220MEFCUA10X16, and 50ZLJ220M10X16 represent the preferred substitution options. These parts carry Active product status and provide 10,000-hour lifetime ratings at 105°C, exceeding the original SXR221M050ST specification of 4,000 hours. All parts maintain ROHS3 compliance and identical electrical and mechanical specifications required for direct replacement.
Secondary Substitutes (Active Status, Equivalent Lifetime):
The Cornell Dubilier / Illinois Capacitor 227KBM050M and Panasonic Electronic Components EEU-FM1H221 and EEU-FM1H221B are suitable alternatives with Active product status. The 227KBM050M provides 7,000-hour lifetime at 105°C. The Panasonic EEU-FM series parts match the original 4,000-hour lifetime specification. All three options maintain full ROHS3 compliance and mechanical compatibility.
Transitional Substitute (Last Time Buy Status):
The Rubycon 50YXH220MEFC10X16 carries Last Time Buy status and provides 7,000-hour lifetime at 105°C. This part is suitable for immediate substitution but should not be selected for new long-term production commitments due to its discontinued status.
Mechanical Consideration:
The original SXR221M050ST features a maximum seated height of 0.984" (25.00mm), while all substitute parts listed above feature a maximum seated height of 0.689" (17.50mm). This dimensional reduction is compatible with through-hole mounting applications and does not affect electrical performance. PCB layout verification is required to confirm clearance compatibility in space-constrained applications.
Frequently Asked Questions (FAQ)
Q: Can the SXR221M050ST be directly replaced with any of the listed substitute parts?
A: Yes. All listed substitute parts match the mandatory electrical and mechanical parameters: 220 µF capacitance, 50 V voltage rating, ±20% tolerance, polar configuration, through-hole mounting, radial can package, 0.197" (5.00mm) lead spacing, and 0.394" (10.00mm) diameter. Direct pin-for-pin replacement is supported. Physical height reduction from 0.984" to 0.689" requires PCB clearance verification.
Q: What is the difference between Active and Last Time Buy product status?
A: Active status indicates ongoing production and long-term availability. Last Time Buy status indicates the manufacturer has announced discontinuation, with limited remaining inventory. The Rubycon 50YXH220MEFC10X16 carries Last Time Buy status and should be used only for immediate replacement needs, not for new designs or long-term production planning.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All substitute parts listed carry ROHS3 Compliant certification, matching the original SXR221M050ST specification. This compliance is maintained across all manufacturers represented: Cornell Dubilier / Illinois Capacitor, Rubycon, and Panasonic Electronic Components.
Q: What is the significance of the lifetime rating difference between 4,000 hours and 10,000 hours at 105°C?
A: Lifetime rating indicates the expected operational duration at maximum rated temperature before capacitance degradation reaches 20% of initial value. The original SXR221M050ST specifies 4,000 hours. Substitute parts offering 7,000 or 10,000 hours provide extended operational life under identical thermal conditions. Selection should be based on application requirements and thermal operating profile.
Q: Does ESR (Equivalent Series Resistance) variation affect substitution compatibility?
A: ESR variation is allowable within the substitution framework. The original SXR221M050ST specifies 600 mOhm ESR at 120 Hz. The 227KBM050M specifies 753.6 mOhm. Rubycon and Panasonic parts do not specify ESR values. ESR affects ripple current handling and heat generation. Applications with strict ripple current requirements should cross-reference ripple current specifications provided in the parameter comparison table.
Q: What packaging options are available for the substitute parts?
A: Substitute parts are available in Bulk and Cut Tape (CT) packaging formats. The EEU-FM1H221B is supplied in Cut Tape format; all other substitute parts are supplied in Bulk format. Packaging selection does not affect electrical or mechanical performance and is determined by procurement and assembly process requirements.
Q: Is height reduction from 0.984" to 0.689" a concern for PCB layout?
A: Height reduction improves PCB clearance and may eliminate previous spatial constraints. However, PCB layout verification is required to confirm that component lead positions and mounting hole spacing remain compatible. Lead spacing of 0.197" (5.00mm) is identical across all parts, ensuring through-hole mounting compatibility.
Q: Which substitute part offers the best overall performance characteristics?
A: Selection depends on application-specific requirements. For maximum operational life, the Rubycon 50ZLJ220M10X16 provides 10,000-hour lifetime with 825 mA ripple current at 120 Hz and 1.65 A at 100 kHz. For cost-optimized solutions matching original specifications, the Panasonic EEU-FM1H221 or EEU-FM1H221B provide 4,000-hour lifetime with 1.155 A ripple current at 120 Hz. The 227KBM050M from Cornell Dubilier / Illinois Capacitor offers a mid-range option with 7,000-hour lifetime.
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