The KEMET ESH337M200AQ4AA is an aluminum electrolytic capacitor designed for operation at elevated temperatures up to 105°C, offering reliable energy storage and filtering in power supply circuits, DC-link applications, and general-purpose electronic systems. This radial-leaded capacitor combines the cost-effectiveness of aluminum electrolytic technology with thermal resilience suitable for industrial and commercial equipment operating in moderately demanding thermal environments.
Aluminum electrolytic capacitors provide high capacitance density per unit volume compared to ceramic or film alternatives, making them a practical choice where bulk capacitance is needed without occupying excessive board space. The 105°C temperature rating extends operational life in applications where ambient temperatures or self-heating from ripple current may otherwise accelerate electrolyte dry-out and equivalent series resistance (ESR) degradation. Engineers selecting capacitors for switched-mode power supplies, motor drives, or audio amplifiers often prioritize temperature tolerance alongside capacitance and voltage rating to ensure long-term stability.
The radial lead configuration simplifies through-hole mounting on single- or double-sided PCBs and offers mechanical robustness in environments subject to vibration or mechanical stress. While surface-mount alternatives dominate high-density designs, radial aluminum electrolytics remain widely deployed in power stages, AC-DC converters, and retrofit applications where through-hole assembly is preferred or legacy board layouts dictate compatibility. The bulk packaging format supports high-volume manufacturing lines and automated insertion equipment, reducing handling costs in production environments.
KEMET maintains active production status for this part number, with RoHS 3 compliance covering lead-free soldering processes and restrictions on hazardous substances under EU directives. REACH registration confirms the absence of substances of very high concern (SVHC) above threshold concentrations, simplifying supply chain documentation for export to European markets. The EAR99 ECCN classification indicates no special export license requirements under U.S. regulations for most destinations, while the HTSUS code 8532.22.0040 applies to aluminum electrolytic capacitors for customs declaration purposes.
Typical applications include input and output filtering in linear and switching regulators, decoupling stages in amplifier circuits, energy storage in flash photography and automotive ignition systems, and DC-bus stabilization in variable-frequency drives. The selection of aluminum electrolytic capacitors for these roles depends on balancing capacitance value, voltage rating, ripple current capability, ESR, and expected lifetime against cost and board space constraints. Engineers often cross-reference datasheets to verify ripple current derating curves, impedance-frequency characteristics, and endurance test conditions when specifying components for designs with defined reliability targets or extended operational lifetimes.
Finding a Practical Replacement for KEMET ESH337M200AQ4AA Aluminum Electrolytic Capacitors
When KEMET ESH337M200AQ4AA is unavailable, approaching end-of-life in a design, or constrained by lead time, the replacement decision should not be based only on matching “330 µF, 200 V.” Aluminum electrolytic capacitor substitution also depends on ripple current capability, ESR behavior, lifetime at 105°C, radial lead spacing, case diameter, height clearance, polarity, compliance status, and how much derating margin exists in the circuit.
Common replacement candidates for KEMET ESH337M200AQ4AA include Nichicon UPW2D331MHD, Panasonic
EEU-ED2D331
, Rubycon 200YXG330MEFC18X35.5, and United Chemi-Con EKXG201ELL331MM35S. These parts are generally evaluated as 330 µF, 200 V, radial aluminum electrolytic capacitor alternatives, but final approval should be based on the latest manufacturer datasheets and the actual PCB/mechanical constraints.
EEU-ED2D331
Panasonic Electronic Components
CAP ALUM 330UF 20% 200V RADIAL
23390
What KEMET ESH337M200AQ4AA Contributes to the Original Circuit
KEMET ESH337M200AQ4AA is an aluminum electrolytic capacitor supplied in bulk packaging and specified as a radial leaded 105°C capacitor. The part number indicates a capacitance value of 330 µF, a capacitance tolerance of ±20%, and a rated voltage of 200 V. It is RoHS3 compliant, REACH unaffected, and listed as an active product.
| Parameter | KEMET ESH337M200AQ4AA Engineering Relevance |
|---|---|
| Manufacturer | KEMET |
| Part number | ESH337M200AQ4AA |
| Capacitor type | Aluminum electrolytic capacitor |
| Capacitance | 330 µF |
| Rated voltage | 200 VDC |
| Tolerance | ±20% |
| Temperature rating | 105°C |
| Mounting style | Radial leaded |
| Packaging | Bulk |
| Compliance | RoHS3 compliant, REACH unaffected |
| Lifecycle status | Active |
In replacement work, the 200 V rating defines the maximum DC working voltage margin, while the 330 µF capacitance influences hold-up time, low-frequency ripple filtering, loop response, and transient ride-through capability. The 105°C rating affects expected service life, especially in power supplies, motor controls, LED drivers, industrial boards, and high-voltage DC bus auxiliary circuits.
Mechanical fit is also part of the electrical decision. A substitute with the same capacitance and voltage may still fail as a drop-in replacement if the case diameter, height, lead spacing, or lead diameter differs from the original PCB footprint. For KEMET ESH337M200AQ4AA replacement selection, the suffix AQ4AA should be checked against the KEMET datasheet to confirm the exact case size and lead configuration before approving an alternative.
Candidate Equivalent Parts for KEMET ESH337M200AQ4AA Replacement Evaluation
The following alternatives are commonly considered when sourcing a 330 µF 200 V radial aluminum electrolytic capacitor replacement. They should be treated as engineering candidates rather than automatic equivalents.
| Manufacturer | Part Number | Key Specifications | Product Features | Typical Applications | Why It Can Replace the Original Part | Main Differences or Limitations | Recommended Usage |
|---|---|---|---|---|---|---|---|
| KEMET | ESH337M200AQ4AA | 330 µF, 200 V, ±20%, radial aluminum electrolytic, 105°C | Original device, RoHS3 compliant, bulk packaging | Power supply filtering, DC link support, industrial electronics, LED driver input/output filtering | Baseline reference part | Availability or allocation may drive replacement search | Use when exact manufacturer continuity and original qualification are preferred |
| Nichicon | UPW2D331MHD | 330 µF, 200 V, radial leaded aluminum electrolytic, 105°C, ±20% typical class | Low-impedance general-purpose power supply series with good ripple performance | Switching power supplies, adapters, industrial control boards | Matches core capacitance, voltage class, polarity, radial construction, and 105°C operating category | Case size, ripple current, ESR, and endurance may differ from KEMET ESH337M200AQ4AA | Good candidate where ripple current capability and brand availability are key selection factors |
| Panasonic |
EEU-ED2D331
Panasonic Electronic Components
CAP ALUM 330UF 20% 200V RADIAL
23390
| 330 µF, 200 V, radial aluminum electrolytic, 105°C | Panasonic ED series, general-purpose long-life radial capacitor family | Power conversion, consumer and industrial power boards, bulk storage positions | Provides the same nominal capacitance and voltage rating in a radial 105°C format | May have different lead spacing and can dimensions; ripple rating must be verified | Suitable for broad replacement use when mechanical fit and ripple current are confirmed |
| Rubycon | 200YXG330MEFC18X35.5 | 330 µF, 200 V, radial aluminum electrolytic, 105°C | YXG series known for high ripple current and long-life power supply use | SMPS output/input filtering, industrial equipment, audio power supplies | Comparable voltage and capacitance with a radial 105°C construction | The specified 18 mm x 35.5 mm size must match PCB clearance; ESR profile may differ | Strong option for designs where ripple handling and thermal endurance are selection drivers |
| United Chemi-Con | EKXG201ELL331MM35S | 330 µF, 200 V, radial aluminum electrolytic, 105°C | KXG series radial capacitor designed for power supply filtering | AC/DC converters, DC bus filtering, industrial electronics | Meets the main electrical class required for replacing KEMET ESH337M200AQ4AA | Mechanical size, endurance rating, ripple current, and availability should be compared against the original datasheet | Appropriate when sourcing from established Japanese capacitor lines with verified layout compatibility |
Among these candidates, Nichicon UPW2D331MHD and Rubycon 200YXG330MEFC18X35.5 are often attractive when ripple current and thermal operation are central concerns. Panasonic
EEU-ED2D331
is a practical general replacement candidate for power electronics designs where long-life 105°C radial capacitors are already accepted. United Chemi-Con EKXG201ELL331MM35S is another suitable option when procurement flexibility and capacitor-series familiarity matter.
EEU-ED2D331
Panasonic Electronic Components
CAP ALUM 330UF 20% 200V RADIAL
23390
Engineering Trade-Offs Between ESH337M200AQ4AA Alternatives
Selecting between KEMET ESH337M200AQ4AA, Nichicon UPW2D331MHD, Panasonic
EEU-ED2D331
, Rubycon 200YXG330MEFC18X35.5, and United Chemi-Con EKXG201ELL331MM35S requires more than matching capacitance and voltage. The table below compares the replacement choices from a practical design and procurement perspective.
EEU-ED2D331
Panasonic Electronic Components
CAP ALUM 330UF 20% 200V RADIAL
23390
| Evaluation Factor | KEMET ESH337M200AQ4AA | Nichicon UPW2D331MHD | Panasonic EEU-ED2D331 | Rubycon 200YXG330MEFC18X35.5 | United Chemi-Con EKXG201ELL331MM35S |
|---|---|---|---|---|---|
| Electrical compatibility | Original 330 µF, 200 V reference part | Generally compatible if ripple current and ESR meet circuit needs | Generally compatible for 330 µF 200 V radial applications | Generally compatible, often considered where ripple capability is valued | Generally compatible if datasheet ratings meet the original operating profile |
| Mechanical compatibility | Original PCB fit | Must verify case diameter, height, lead spacing, and lead diameter | Must verify footprint and height clearance | Known size indication suggests 18 mm x 35.5 mm; verify against original AQ4AA package | Must verify suffix-defined dimensions and PCB lead spacing |
| Performance differences | Baseline ESR, ripple, and endurance | May provide lower impedance depending on operating frequency | Balanced general-purpose performance | Often favorable for ripple-heavy power supply positions | Suitable for power filtering, but exact ESR/ripple comparison is required |
| Reliability consideration | Already qualified in the original design | Strong manufacturer reputation; confirm lifetime at actual temperature | Established Panasonic reliability; confirm endurance class | Good fit for thermally stressed filtering if ratings align | Established capacitor supplier; confirm endurance under ripple load |
| Package availability | Bulk stock may vary | Availability depends on distributor inventory | Common replacement family in many supply chains | May be available through industrial capacitor channels | Often available through authorized or professional component suppliers |
| Cost consideration | Original part may be cost-effective when available | May cost more or less depending on market supply | Typically competitive for general replacement | May carry a premium if high-ripple performance is needed | Pricing depends on inventory and regional supply |
| Best-fit application scenario | Use when maintaining original BOM is preferred | Switching power supplies and designs sensitive to ESR/ripple | General 105°C radial aluminum electrolytic replacement | Higher ripple or warmer operating environments, subject to datasheet confirmation | Industrial and power conversion applications requiring stable sourcing |
| Main advantage | No redesign or requalification burden if original is available | Good balance of electrical performance and brand confidence | Broad usability and familiar Panasonic capacitor ecosystem | Strong candidate for ripple-focused replacement decisions | Good sourcing alternative from a recognized capacitor manufacturer |
| Main limitation | May be limited by stock, price, or lifecycle risk | Not automatically drop-in without mechanical verification | May not match original ripple or ESR exactly | Larger case may create fit constraints | Requires detailed comparison of endurance, ripple, and dimensions |
For a conservative replacement strategy, first confirm the original KEMET ESH337M200AQ4AA operating conditions: applied DC voltage, ripple current, ambient temperature, airflow, expected lifetime, and PCB footprint. If the capacitor operates far below its ratings, Panasonic
EEU-ED2D331
or United Chemi-Con EKXG201ELL331MM35S may be suitable practical alternatives. If ripple current and thermal stress are more demanding, Nichicon UPW2D331MHD or Rubycon 200YXG330MEFC18X35.5 may deserve closer review.
EEU-ED2D331
Panasonic Electronic Components
CAP ALUM 330UF 20% 200V RADIAL
23390
Before approving any KEMET ESH337M200AQ4AA equivalent, compare datasheet values for capacitance tolerance, leakage current, rated ripple current, ESR or impedance, endurance hours, case size, lead spacing, and safety/compliance documentation. For pricing and availability of KEMET ESH337M200AQ4AA replacement parts, request quotations through IC-Components.com or contact Info@IC-Components.com.
