SN221M035ST

Part Overview

The SN221M035ST is a 220 µF 35 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, making identification of equivalent alternatives essential for circuit design continuity and board redesign efforts. The part serves general-purpose applications requiring 220 µF capacitance at 35 V rated voltage in through-hole mounting configurations.

Substiute Parts

SN221M035ST

Cornell Dubilier Electronics (CDE)In Stock: 839SN221M035ST Datasheet

Current PartRFQ

ECE-A1VN221U

Panasonic Electronic ComponentsIn Stock: 1057ECE-A1VN221U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN221M035ST is determined by strict adherence to the following electrical and mechanical parameters:

Core Parameters for Substitution:

• Capacitance: 220 µF (no deviation)
• Voltage Rating: 35 V minimum (higher ratings acceptable)
• Tolerance: ±20% (matches tolerance class)
• Mounting: Through Hole, Radial configuration
• Lead Spacing: 0.197" (5.00mm)
• Polarization: Bi-Polar
• Temperature Range: -40°C ~ 85°C minimum

The ECE-A1VN221U from Panasonic Electronic Components meets all substitution criteria. Both parts share identical capacitance, voltage rating, tolerance, mounting type, lead spacing, polarization, and operating temperature range. The substitute part is currently in active production status, providing design continuity for obsolete SN221M035ST applications.

Parameter Comparison

Engineering Selection Recommendations

The ECE-A1VN221U is suitable for direct substitution of the obsolete SN221M035ST. Both components maintain identical electrical specifications (220 µF, 35 V, ±20% tolerance) and physical compatibility (5.00mm lead spacing, through-hole radial mounting). The substitute part offers improved operational characteristics: doubled lifetime rating (2000 Hrs @ 85°C versus 1000 Hrs @ 85°C) and active production status from a major manufacturer.

The ECE-A1VN221U has a smaller physical form factor (0.492" diameter, 0.787" height) compared to the SN221M035ST (0.630" diameter, 0.984" height). This dimensional reduction benefits circuit board layout optimization while maintaining electrical equivalence. Both parts achieve ROHS3 compliance, supporting environmental and regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can the ECE-A1VN221U directly replace the SN221M035ST in existing designs? A: Yes. Both parts share identical electrical ratings (220 µF, 35 V, ±20% tolerance), lead spacing (5.00mm), polarization (Bi-Polar), and operating temperature range (-40°C ~ 85°C). The smaller physical dimensions of the substitute part present a layout advantage without electrical degradation.

Q: What is the impact of the different physical sizes on board redesign? A: The ECE-A1VN221U occupies less board space (0.492" diameter, 0.787" height) than the SN221M035ST (0.630" diameter, 0.984" height). Existing pad layouts and through-hole placements remain compatible due to identical 5.00mm lead spacing. Mechanical clearance requirements should be revalidated in the specific application circuit.

Q: How do ripple current ratings affect component selection? A: The SN221M035ST specifies 520 mA ripple current at 120 Hz, while the ECE-A1VN221U specifies 360 mA at 120 Hz. Applications requiring ripple current handling near or exceeding 360 mA should evaluate the difference in thermal dissipation characteristics at the specified frequency and operating point.

Q: What is the advantage of the extended lifetime rating in the substitute part? A: The ECE-A1VN221U provides 2000 hours lifetime at 85°C versus 1000 hours for the SN221M035ST. Extended operational lifetime supports applications requiring higher reliability margins and longer service intervals, particularly in controlled thermal environments.

Q: Are both parts environmentally compliant? A: Yes. Both the SN221M035ST and ECE-A1VN221U are ROHS3 compliant. The ECE-A1VN221U additionally carries REACH Unaffected status, confirming compliance with chemical substance regulations.