The KEMET R76MN333050H3J is a 0.33 µF metallized polypropylene film capacitor engineered for high-reliability automotive and switching applications. Rated for 400VDC operation with 250VAC handling capability, this through-hole radial component from KEMET's R76 series delivers robust performance across a wide temperature range of -55°C to 125°C while meeting AEC-Q200 automotive qualification standards.
Metallized polypropylene construction provides low ESR characteristics—8 mOhms typical—enabling efficient energy transfer in high-frequency switching circuits and pulse-handling topologies where dV/dt stress is present. The 400V DC rating and inherent self-healing properties of the metallized film structure make this capacitor suitable for applications involving transient voltage suppression, snubber networks, and DC link filtering in power conversion systems. The ±5% capacitance tolerance supports designs where moderate precision is acceptable, balancing cost with performance in volume automotive electronics and industrial control environments.
The radial lead configuration with 22.50mm pitch (0.886") allows straightforward PCB integration in through-hole assemblies. Physical dimensions of 26.50mm length × 8.50mm width × 17.10mm seated height accommodate standard board spacing in power supply layouts, motor drives, and lighting ballasts. PC pin terminations ensure mechanical stability during wave soldering and provide low-resistance connections in high-current paths.
Operating temperature capability extending to 125°C supports underhood automotive placement and industrial equipment operating in elevated ambient conditions. AEC-Q200 qualification confirms compliance with automotive stress testing protocols, including temperature cycling, humidity resistance, and vibration endurance. RoHS3 compliance and REACH unaffected status align with current environmental regulations for global supply chain integration.
This 0.33 µF polypropylene film capacitor addresses design requirements in automotive power electronics, switched-mode power supplies, and high-frequency inverter circuits where low-loss dielectric performance, voltage withstand capability, and thermal stability converge. The R76 series targets applications demanding proven film capacitor technology with automotive-grade reliability documentation.
R76MN333050H3J (1)
Replacement Planning for KEMET R76MN333050H3J Film Capacitors in 400 VDC Radial Designs
When KEMET R76MN333050H3J is unavailable, approaching end-of-life risk, or needs a second-source strategy, selecting a replacement is not only a matter of matching “0.33 µF, 400 VDC.” This part is a metallized polypropylene film capacitor used where pulse handling, low ESR, stable capacitance, and through-hole mechanical fit affect circuit behavior.
Possible equivalent or alternative part numbers to evaluate include KEMET R76MN333050H3J, TDK EPCOS
B32652A3334J000
, Panasonic ECW-FD2W334J, WIMA MKP4F033305E00JSSD, Vishay MKP1848C63350JP2, and Cornell Dubilier 935C2W334J-F. These parts are not automatically interchangeable in every design; voltage rating, lead spacing, temperature range, pulse current capability, safety approvals, and automotive qualification should be checked against the original application.
B32652A3334J000
EPCOS - TDK Electronics
CAP FILM 0.33UF 5% 250VDC RADIAL
2000000
What KEMET R76MN333050H3J Contributes to the Circuit Before Choosing an Equivalent
KEMET R76MN333050H3J is a KEMET R76 series radial metallized polypropylene film capacitor rated at 0.33 µF with ±5% tolerance, 400 VDC and 250 VAC ratings, and an operating temperature range of -55°C to +125°C. It uses through-hole PC pin terminations with a 22.50 mm lead spacing and a body size of approximately 26.50 mm x 8.50 mm, with a seated height of 17.10 mm.
Its polypropylene dielectric gives it low dielectric loss, good capacitance stability, and suitability for high-frequency switching, high pulse, and high dV/dt circuits. The specified ESR of about 8 mOhms supports use in snubber, resonance, coupling, and pulse energy paths where capacitor heating can influence reliability.
The AEC-Q200 rating also affects replacement decisions. If the capacitor is used in an automotive inverter, DC/DC converter, lighting driver, motor control board, or high-frequency switching module, replacing it with a non-AEC-Q200 component may require additional qualification. Mechanical fit is another constraint: a 22.5 mm pitch radial capacitor may not be directly replaced by a 27.5 mm pitch or larger-bodied power film capacitor unless the PCB layout allows bending, alternate holes, or redesign.
Candidate Equivalent and Alternative Parts for KEMET R76MN333050H3J
The following table compares practical replacement candidates for KEMET R76MN333050H3J. Values should be verified against the latest manufacturer datasheet and the actual circuit stress profile before approval.
| Manufacturer | Part Number | Key Specifications | Product Features | Typical Applications | Why It Can Replace the Original Part | Main Differences or Limitations | Recommended Usage |
|---|---|---|---|---|---|---|---|
| KEMET | R76MN333050H3J | 0.33 µF, ±5%, 400 VDC, 250 VAC, metallized PP, radial, 22.5 mm pitch, -55°C to +125°C, AEC-Q200 | Low ESR, high pulse capability, polypropylene dielectric, automotive-qualified R76 series | Automotive electronics, switching converters, pulse circuits, high-frequency snubbers | Exact original part; preserves electrical rating, dielectric type, lead pitch, and qualification status | Availability may vary; bulk packaging may require handling controls | First choice for direct replacement and production continuity |
| TDK EPCOS |
B32652A3334J000
EPCOS - TDK Electronics
CAP FILM 0.33UF 5% 250VDC RADIAL
2000000
| 0.33 µF, ±5%, polypropylene film, radial, typically 400 VDC class, pulse-grade construction | Designed for pulse, snubber, and switching applications; low-loss PP dielectric | SMPS, electronic ballasts, industrial converters, pulse circuits | Similar capacitance, tolerance, dielectric type, and radial film construction | Temperature range, body size, and lead configuration may differ; AEC-Q200 status must be checked | Strong candidate for industrial switching and pulse applications where automotive approval is not mandatory |
| Panasonic | ECW-FD2W334J | 0.33 µF, ±5%, 450 VDC, metallized polypropylene, radial leaded | Higher DC voltage class than original, stable PP dielectric, compact film capacitor format | DC link auxiliary circuits, resonant converters, snubber networks, high-frequency coupling | Capacitance and tolerance match; 450 VDC rating provides voltage margin over 400 VDC original | Operating temperature and pulse current capability may not equal KEMET R76; automotive qualification may differ | Suitable when voltage margin is desired and PCB fit is confirmed |
| WIMA | MKP4F033305E00JSSD | 0.33 µF class, ±5%, metallized polypropylene, radial box film construction | General-purpose and pulse-capable MKP construction with stable dielectric behavior | Filtering, coupling, timing, snubber, and switching circuits | Similar PP dielectric and capacitance class make it a potential functional alternative | Exact voltage code, dimensions, pitch, and pulse rating must be verified by suffix; may not be AEC-Q200 | Best for commercial or industrial boards after mechanical and pulse-current validation |
| Vishay | MKP1848C63350JP2 | 0.33 µF, ±5%, metallized polypropylene, higher-voltage radial film family | Robust DC and pulse handling, low-loss MKP dielectric, power electronics orientation | DC/DC converters, resonant circuits, power supplies, pulse discharge, industrial drives | Provides comparable capacitance with potentially higher voltage and pulse capability | Often larger than standard 22.5 mm film capacitors; lead spacing and height may require PCB review | Good upgrade path where space allows and higher electrical stress margin is useful |
| Cornell Dubilier | 935C2W334J-F | 0.33 µF, ±5%, polypropylene film, radial leaded, power/snubbers family | Designed for high pulse and high-frequency power circuits | IGBT snubbers, switching supplies, pulse circuits, power conversion | Similar capacitance, tolerance, and PP dielectric support comparable circuit function | Package size, lead pitch, and automotive qualification may not match KEMET R76MN333050H3J | Consider for high-pulse industrial designs where electrical stress exceeds standard film capacitor margins |
Among these options, TDK EPCOS
B32652A3334J000
and Panasonic ECW-FD2W334J are usually closer electrical substitutes for a 0.33 µF polypropylene radial film capacitor. Vishay MKP1848C63350JP2 and Cornell Dubilier 935C2W334J-F may provide stronger pulse or voltage capability but can introduce mechanical fit issues. WIMA MKP4F033305E00JSSD is a useful candidate when the design can tolerate differences in approval status, lead pitch, and package geometry.
B32652A3334J000
EPCOS - TDK Electronics
CAP FILM 0.33UF 5% 250VDC RADIAL
2000000
Engineering Trade-Off Comparison for KEMET R76MN333050H3J Replacement Selection
Replacement selection should be based on the operating function of the capacitor. A capacitor used as a snubber across a switching device needs pulse current and dV/dt margin. A capacitor used in a timing or coupling path may be more sensitive to capacitance tolerance and dielectric stability. A capacitor used in an automotive assembly must also maintain qualification alignment.
| Evaluation Factor | KEMET R76MN333050H3J | TDK EPCOS B32652A3334J000 | Panasonic ECW-FD2W334J | WIMA MKP4F033305E00JSSD | Vishay MKP1848C63350JP2 | Cornell Dubilier 935C2W334J-F |
|---|---|---|---|---|---|---|
| Electrical compatibility | Baseline: 0.33 µF, ±5%, 400 VDC, 250 VAC | Close match if voltage and pitch variant are confirmed | Close capacitance match with 450 VDC margin | Depends on exact suffix voltage rating | Often exceeds voltage/pulse needs | Often suited to higher pulse stress |
| Mechanical compatibility | 22.5 mm pitch, 26.5 mm length, radial through-hole | Usually similar radial format, dimensions must be checked | Often close to 22.5 mm radial layout | Box size and pitch depend on ordering code | May be larger; PCB clearance review needed | May be larger than original R76 part |
| Performance behavior | Low ESR, PP dielectric, high-frequency and pulse capable | Good pulse behavior for switching designs | Stable PP dielectric with higher DC voltage rating | Suitable for general MKP use; pulse rating must be confirmed | Strong power-electronics capability | Strong snubber and pulse capability |
| Reliability considerations | AEC-Q200, -55°C to +125°C | Qualification depends on exact series approval | Automotive approval may not match original | Usually requires application-level validation | Good for industrial power stress; automotive status must be verified | Good for industrial stress; automotive status must be verified |
| Best-fit applications | Automotive switching, high dV/dt, high-frequency circuits | Industrial SMPS, pulse networks, snubbers | Converter auxiliary circuits, coupling, resonant sections | General industrial filtering and coupling | Higher-stress power conversion where space allows | IGBT/MOSFET snubbers and pulse-heavy applications |
| Main advantage | Direct equivalence with known qualification | Balanced electrical similarity | Voltage headroom over 400 VDC | Broad MKP availability | Higher stress margin | Pulse-oriented construction |
| Main limitation | Supply availability | Must verify exact mechanical and approval match | May need temperature and pulse derating review | Suffix-dependent specifications | Larger package risk | Package and qualification mismatch risk |
For a direct replacement of KEMET R76MN333050H3J, the safest route is the same KEMET part number. If the design does not require AEC-Q200 approval, TDK EPCOS
B32652A3334J000
or Panasonic ECW-FD2W334J can be practical alternatives after confirming footprint, operating temperature, ripple current, and dV/dt limits. For higher-energy snubber or pulse applications, Vishay MKP1848C63350JP2 and Cornell Dubilier 935C2W334J-F may offer additional electrical margin, but the PCB layout and enclosure clearance should be reviewed.
B32652A3334J000
EPCOS - TDK Electronics
CAP FILM 0.33UF 5% 250VDC RADIAL
2000000
For current availability, pricing, and quotations for KEMET R76MN333050H3J replacement parts, use the professional electronic components website IC-Components.com or email Info@IC-Components.com.
