EKY-6R3ELL331MF11D

The Chemi-Con EKY-6R3ELL331MF11D is a 330 µF radial aluminum electrolytic capacitor rated for 6.3 V operation, designed for general-purpose applications requiring moderate capacitance in compact through-hole form factors. This component belongs to Chemi-Con's KY series and is supplied in a radial can package measuring 6.3 mm in diameter and 12.5 mm in height, with a 2.5 mm lead spacing that accommodates standard PCB layouts.

The capacitor offers a tolerance of ±20%, which suits applications where precise capacitance values are less stringent than bulk energy storage or filtering requirements. With an operating temperature range spanning -40°C to 105°C and a rated lifetime of 4000 hours at 105°C, the EKY-6R3ELL331MF11D provides reliable performance across consumer and industrial environments. The 220 milliohm impedance at 100 kHz, combined with ripple current handling of 170 mA at 120 Hz and 340 mA at 100 kHz, enables effective smoothing in low-voltage power supply circuits, DC-DC converter output stages, and signal decoupling networks.

Radial aluminum electrolytic capacitors in this voltage and capacitance range are commonly selected for input and output filtering in low-power embedded systems, battery-powered devices, and portable electronics where board space and cost efficiency drive component selection. The polar configuration requires proper orientation during assembly, with clear polarity marking on the component body guiding placement. The through-hole mounting method facilitates manual and automated assembly processes, particularly in mixed-technology boards where surface-mount density must coexist with larger or higher-power through-hole components.

While the EKY-6R3ELL331MF11D carries an obsolete product status, current inventory availability of over 1000 pieces supports short-term design-in, repair, and service needs. Chemi-Con provides substitute part numbers including EKZE6R3ELL331MF11D EKZE6R3ELL331MF11D United Chemi-Con CAP ALUM 330UF 20% 6.3V RADIAL 3534 and 6.3YXS330MEFC6.3X11 6.3YXS330MEFC6.3X11 Rubycon CAP ALUM 330UF 20% 6.3V RADIAL 2000000 within its own product family, alongside cross-references to other manufacturers such as UHD0J331MED UHD0J331MED Nichicon CAP ALUM 330UF 20% 6.3V RADIAL 4989 and EEU-FM0J331 EEU-FM0J331 Panasonic Electronic Components CAP ALUM 330UF 20% 6.3V RADIAL 4261 , enabling engineers to evaluate alternate sources during component selection or end-of-life transitions. The part complies with RoHS 3 regulations and remains REACH-unaffected, aligning with contemporary environmental and material compliance frameworks. Its ECCN classification of EAR99 and HTSUS code 8532.22.0020 streamline international trade documentation for global supply chains.

EKY-6R3ELL331MF11D (1)

Replacement Planning for Chemi-Con EKY-6R3ELL331MF11D 330µF 6.3V Radial Capacitors

Chemi-Con EKY-6R3ELL331MF11D is an obsolete KY-series aluminum electrolytic capacitor, so replacement work usually begins when an existing BOM, repair order, or production build can no longer rely on stable long-term supply. Selecting an equivalent capacitor is not only a matter of matching “330µF 6.3V.” The replacement must also fit the PCB footprint, tolerate the ripple current and temperature profile, maintain acceptable impedance in the circuit, and meet reliability expectations over the product life.

Common equivalent and alternative part numbers for EKY-6R3ELL331MF11D include EKZE6R3ELL331MF11D EKZE6R3ELL331MF11D United Chemi-Con CAP ALUM 330UF 20% 6.3V RADIAL 3534 from Chemi-Con, 6.3YXS330MEFC6.3X11 6.3YXS330MEFC6.3X11 Rubycon CAP ALUM 330UF 20% 6.3V RADIAL 2000000 from Rubycon, UHD0J331MED UHD0J331MED Nichicon CAP ALUM 330UF 20% 6.3V RADIAL 4989 from Nichicon, EEU-FM0J331 EEU-FM0J331 Panasonic Electronic Components CAP ALUM 330UF 20% 6.3V RADIAL 4261 from Panasonic, and UHE0J331MED UHE0J331MED Nichicon CAP ALUM 330UF 20% 6.3V RADIAL 2000000 from Nichicon. These parts are all in the same general class of 330µF, 6.3V, radial aluminum electrolytic capacitors, but they differ in ripple capability, impedance behavior, endurance series positioning, and availability.

A sound replacement decision should verify three areas first: electrical stress in the actual circuit, mechanical fit on the PCB, and lifecycle risk. In low-voltage power rails, switching regulator outputs, embedded control boards, and general decoupling networks, impedance and ripple current can influence stability, temperature rise, and capacitor aging. Therefore, the best substitute is the one that matches the original circuit requirements, not simply the one with the closest capacitance value.

What the Chemi-Con EKY-6R3ELL331MF11D Original Capacitor Defines for Replacement Selection

The original Chemi-Con EKY-6R3ELL331MF11D is a polarized radial aluminum electrolytic capacitor rated at 330µF with ±20% tolerance and a 6.3V working voltage. It belongs to the Chemi-Con KY series and is specified for 4000 hours at 105°C. Its package is a radial can with 6.3mm diameter, 12.5mm maximum seated height, and 2.50mm lead spacing.

Key electrical and mechanical reference points for replacement evaluation include:

The KY-series positioning suggests a capacitor intended for general-purpose to low-impedance use in compact power circuits. Typical applications include low-voltage DC rail filtering, secondary-side power supply smoothing, embedded controller boards, consumer electronics, communication equipment, and general decoupling where a radial electrolytic capacitor is preferred.

For replacement selection, the 6.3V rating deserves attention. On 5V rails, 6.3V capacitors may be used in cost- and space-sensitive designs, but voltage derating is limited. If the circuit experiences transients, elevated ambient temperature, or long service life requirements, a 10V alternative could be considered only if PCB space and electrical behavior allow it. Since the listed substitutes are 6.3V-class replacements, they are best evaluated as footprint-compatible alternatives rather than derating upgrades.

Candidate Equivalent Parts for EKY-6R3ELL331MF11D and How Each Replacement Fits

The following table compares the main replacement candidates for Chemi-Con EKY-6R3ELL331MF11D. Exact ripple current, impedance, endurance, and case-size values should be checked against the latest manufacturer datasheet and procurement lot information, because series revisions and size codes can affect performance.

Manufacturer	Part Number	Key Specifications	Product Features	Typical Applications	Why It Can Replace the Original Part	Main Differences or Limitations	Recommended Usage
Chemi-Con	EKZE6R3ELL331MF11D EKZE6R3ELL331MF11D United Chemi-Con CAP ALUM 330UF 20% 6.3V RADIAL 3534	330µF, 6.3V, radial aluminum electrolytic, typically 6.3mm x 11mm class, low-impedance KZE series	Same manufacturer ecosystem, low-impedance design, 105°C class	Power supply output filtering, DC-DC converter rails, general low-voltage smoothing	Same capacitance, voltage rating, radial construction, and similar compact footprint make it a close engineering substitute	KZE series may have different impedance/ripple profile than KY; lifecycle and availability should be checked	Preferred when maintaining Chemi-Con brand continuity and similar low-impedance behavior is desired
Rubycon	6.3YXS330MEFC6.3X11 6.3YXS330MEFC6.3X11 Rubycon CAP ALUM 330UF 20% 6.3V RADIAL 2000000	330µF, 6.3V, radial electrolytic, 6.3mm x 11mm size code, 105°C YXS series	Established general-purpose 105°C radial capacitor family	General decoupling, consumer electronics, control boards, moderate ripple rails	Matches capacitance, voltage, radial format, and similar mechanical size	May not equal the KY series impedance or high-frequency ripple rating in demanding power circuits	Suitable for general-purpose replacement where ripple stress is moderate and PCB fit is the main constraint
Nichicon	UHD0J331MED UHD0J331MED Nichicon CAP ALUM 330UF 20% 6.3V RADIAL 4989	330µF, 6.3V, radial aluminum electrolytic, HD series, low impedance, 105°C class	Low-impedance radial capacitor with reliability-oriented series positioning	Switching power supply outputs, regulator filtering, embedded power rails	Same nominal capacitance and voltage with low-impedance characteristics suitable for many KY replacements	Ripple current and impedance may differ by case size; confirm lead pitch and height	Strong candidate for power rail filtering where low impedance and recognized brand availability are needed
Panasonic	EEU-FM0J331 EEU-FM0J331 Panasonic Electronic Components CAP ALUM 330UF 20% 6.3V RADIAL 4261	330µF, 6.3V, radial aluminum electrolytic, FM series, low ESR, high ripple current class, 105°C	Low ESR and high ripple capability in compact radial format	SMPS secondary filtering, DC-DC converter output capacitors, high-ripple low-voltage rails	Electrical class is often equal or stronger for ripple/ESR-sensitive applications, while maintaining the same capacitance and voltage	Lower ESR than original may alter loop stability in some older regulator designs; verify control-loop requirements	Best suited for ripple-current-heavy circuits and compact power supply repairs
Nichicon	UHE0J331MED UHE0J331MED Nichicon CAP ALUM 330UF 20% 6.3V RADIAL 2000000	330µF, 6.3V, radial aluminum electrolytic, HE series, low impedance, high reliability, 105°C class	Low impedance, long-life series option within Nichicon radial electrolytics	Industrial boards, power supplies, communication equipment, long-service electronics	Same capacitance and voltage rating with low-impedance behavior and broad application fit	Mechanical dimensions and endurance rating must be confirmed for the selected suffix and production version	Good balanced substitute when reliability and broad sourcing are priorities

Among these options, EKZE6R3ELL331MF11D EKZE6R3ELL331MF11D United Chemi-Con CAP ALUM 330UF 20% 6.3V RADIAL 3534 is often the most natural first review point because it remains within the Chemi-Con product family. It can simplify approval documentation where manufacturer continuity matters. However, being from a different series, it should not be treated as electrically identical without checking impedance, ripple current, endurance, and dimensional data.

Panasonic EEU-FM0J331 EEU-FM0J331 Panasonic Electronic Components CAP ALUM 330UF 20% 6.3V RADIAL 4261 is attractive where the original capacitor is used on a switching regulator output or other ripple-heavy rail. The FM series is known for low ESR and strong ripple capability, which can reduce capacitor self-heating. The trade-off is that much lower ESR can affect compensation in some older power circuits designed around higher ESR electrolytics.

Nichicon UHD0J331MED UHD0J331MED Nichicon CAP ALUM 330UF 20% 6.3V RADIAL 4989 and UHE0J331MED UHE0J331MED Nichicon CAP ALUM 330UF 20% 6.3V RADIAL 2000000 are practical alternatives when a low-impedance 105°C radial capacitor is required with stable brand availability. The HD and HE series may differ in endurance and ripple current depending on size, so the exact MED suffix and body dimensions should be verified.

Rubycon 6.3YXS330MEFC6.3X11 6.3YXS330MEFC6.3X11 Rubycon CAP ALUM 330UF 20% 6.3V RADIAL 2000000 is more suitable where the original part is used in general filtering rather than high-ripple converter output service. It can be a useful substitute when mechanical compatibility is the main requirement, but it should be reviewed carefully in circuits that depend on low impedance at high frequency.

Engineering Trade-Off Comparison for EKY-6R3ELL331MF11D Replacement Options

Replacement selection should be based on the circuit role of the capacitor. A capacitor used for bulk hold-up on a lightly loaded 5V rail may accept a broader range of substitutes than one used at the output of a high-frequency buck converter. The following comparison focuses on practical decision factors rather than only nominal capacitance and voltage.

For a near drop-in replacement of Chemi-Con EKY-6R3ELL331MF11D, EKZE6R3ELL331MF11D EKZE6R3ELL331MF11D United Chemi-Con CAP ALUM 330UF 20% 6.3V RADIAL 3534 should be reviewed first when Chemi-Con continuity and low-impedance behavior are preferred. For applications with higher ripple current or heat concerns, Panasonic EEU-FM0J331 EEU-FM0J331 Panasonic Electronic Components CAP ALUM 330UF 20% 6.3V RADIAL 4261 may provide stronger electrical margin, provided the power supply control loop can tolerate the ESR change. Nichicon UHD0J331MED UHD0J331MED Nichicon CAP ALUM 330UF 20% 6.3V RADIAL 4989 and UHE0J331MED UHE0J331MED Nichicon CAP ALUM 330UF 20% 6.3V RADIAL 2000000 offer balanced alternatives for low-voltage power rails where brand reliability and sourcing flexibility matter. Rubycon 6.3YXS330MEFC6.3X11 6.3YXS330MEFC6.3X11 Rubycon CAP ALUM 330UF 20% 6.3V RADIAL 2000000 is a practical option for general-purpose circuits, especially when the load profile is not ripple-intensive.

Before approving any substitute, verify polarity marking, lead spacing, body diameter, seated height, ripple current at operating frequency, impedance or ESR, lifetime rating, and compliance requirements such as RoHS. If the capacitor is part of a regulator output network, also check output ripple, transient response, startup behavior, and loop stability after substitution.

For quotation support and sourcing of EKY-6R3ELL331MF11D replacement parts such as EKZE6R3ELL331MF11D EKZE6R3ELL331MF11D United Chemi-Con CAP ALUM 330UF 20% 6.3V RADIAL 3534 , 6.3YXS330MEFC6.3X11 6.3YXS330MEFC6.3X11 Rubycon CAP ALUM 330UF 20% 6.3V RADIAL 2000000 , UHD0J331MED UHD0J331MED Nichicon CAP ALUM 330UF 20% 6.3V RADIAL 4989 , EEU-FM0J331 EEU-FM0J331 Panasonic Electronic Components CAP ALUM 330UF 20% 6.3V RADIAL 4261 , and UHE0J331MED UHE0J331MED Nichicon CAP ALUM 330UF 20% 6.3V RADIAL 2000000 , obtain quotes through IC-Components.com or email Info@IC-Components.com.