UF MPX Series capacitor — 4.7μF, 400VDC

UF MPX Series capacitor — 4.7μF, 250VDC

 

UF Capacitor MPX Series Audio Capacitors are metallized polypropylene film capacitors with axial leads for loudspeaker crossover networks, pre-amplifiers, power amplifiers and other audio equipment.

UF Capacitor Capacitors lists the UF Capacitor MPX Series Audio Capacitors as cross-reference products for several commonly specified audio capacitor families:

 

• Mundorf MCAP Series / MKP Series
• Jantzen Audio CROSS CAP Series
• ClarityCap CSA Series
• ERSE PEX Series Metallized Polyester

 

The UF Capacitor MPX Series Audio Capacitors are available in capacitance values from 0.047μF to 100μF, with 250VDC, 400VDC and 630VDC voltage options. Standard tolerance options include ±3% and ±5%. The published operating temperature range is -55°C to +85°C.

An exact replacement still needs to be checked against the original capacitor's capacitance, voltage, tolerance and dimensions. Cross-reference does not mean that every part number is mechanically interchangeable.

 

UF Capacitor MPX Series Audio Capacitors for Audio Applications

 

UF Capacitor MPX Series Audio Capacitors use metallized polypropylene film and axial-lead construction.

The series is intended for applications where film capacitors are commonly used in the audio signal path or passive crossover. Typical applications include:

 

• Loudspeaker passive crossover networks
• Two-way and three-way speaker crossovers
• Pre-amplifiers
• Power amplifiers
• Tube amplifiers
• Phono amplifiers
• Other high-fidelity audio equipment

 

UF Capacitor's published specifications list low ESR, low inductance and a low dissipation factor among the characteristics of the series.

The capacitance range is broad enough to cover both relatively small signal-path values and the larger values commonly found in speaker crossover networks.

 

UF Capacitor MPX Series Audio Capacitors Cross-Reference

 

The following is the cross-reference published by UF Capacitor Capacitors:

Photo	Description	UF Capacitor Capacitors Series Code	ERSE	Mundorf	Clarity Cap	Jantzen Audio
	MPX Series: Premium Metallized Polypropylene Film Capacitors Axial Lead,	MPX Series	PEX Series Metallized Polyester	MCAP Series MKP Series	CSA Series	CROSS CAP Series

 

For a production replacement, engineers should compare the individual part numbers rather than relying only on the series name.

 

UF Capacitor MPX Series Audio Capacitors as a Mundorf MCAP / MKP Alternative

 

Mundorf's MCap Classic is an audio film capacitor using polypropylene film with aluminium metallization. The current MCap Classic range includes 250V, 400V and 630V versions, depending on capacitance.

This makes UF Capacitor MPX Series Audio Capacitors relevant when an OEM is looking for another source for an existing Mundorf MCAP/MKP-type application.

The comparison should normally start with:

 

• Capacitance
• Rated voltage
• Capacitance tolerance
• Capacitor diameter
• Capacitor length
• Lead diameter
• Lead length
• Installation space

 

UF Capacitor MPX Series Audio Capacitors are available in 250VDC, 400VDC and 630VDC versions, allowing engineers to select the voltage rating according to the original application.

UF Capacitor MPX Series Audio Capacitors can therefore be evaluated as a Mundorf MCAP / MKP alternative, with the final part selection based on the actual electrical and mechanical requirements.

 

UF Capacitor MPX Series Audio Capacitors as a Jantzen Audio CROSS CAP Alternative

 

Jantzen Audio CROSS CAP is another widely used polypropylene film capacitor for loudspeaker crossover and audio applications.

UF Capacitor lists the Jantzen Audio CROSS CAP Series alongside the UF Capacitor MPX Series Audio Capacitors in its published cross-reference information.

For speaker manufacturers, the important points when comparing the two products are not only capacitance and voltage. Physical size and tolerance also matter because crossover components are often installed in a fixed PCB or enclosure layout.

UF Capacitor MPX Series Audio Capacitors are available with ±3% and ±5% tolerance options, with ±5% commonly specified for the standard MPX product range.

For an OEM currently using Jantzen CROSS CAP, UF Capacitor can provide samples for comparison and qualification before a production change.

 

UF Capacitor MPX Series Audio Capacitors as a ClarityCap CSA Alternative

 

ClarityCap CSA capacitors are polypropylene film capacitors used in audio applications, including loudspeaker crossover networks.

UF Capacitor's own cross-reference identifies ClarityCap CSA Series as a cross-reference for UF Capacitor MPX Series Audio Capacitors.

The two products should not be described as identical constructions. ClarityCap uses its own construction and manufacturing methods, while UF Capacitor MPX Series Audio Capacitors have their own metallized polypropylene film and axial-lead construction.

For a replacement evaluation, the useful comparison is:

Specification	Check before replacement
Capacitance	Same nominal value
Voltage	Equal or higher where appropriate
Tolerance	Same or acceptable tolerance
Dimensions	Must fit the existing design
Lead configuration	Must suit PCB or wiring
Temperature	Must meet application requirements
Electrical characteristics	Verify for the specific circuit

 

This is particularly important for crossover networks, where capacitor value has a direct effect on the crossover frequency.

 

UF Capacitor MPX Series Audio Capacitors as an ERSE PEX Alternative

 

ERSE PEX is a metallized polyester capacitor series.

UF Capacitor lists ERSE PEX Series Metallized Polyester as a cross-reference for UF Capacitor MPX Series Audio Capacitors in its audio capacitor cross-reference.

Technical difference: ERSE PEX uses polyester dielectric, while UF Capacitor MPX Series Audio Capacitors use polypropylene dielectric.

Therefore, the two should not be presented as identical capacitors. A customer replacing a PEX capacitor with a UF Capacitor MPX Series Audio Capacitor should check the electrical characteristics required by the circuit and qualify the replacement.

For many audio applications, the polypropylene construction of UF Capacitor MPX is a reason to consider the series when an OEM wants to change from a polyester film capacitor to a polypropylene film capacitor.

 

UF Capacitor MPX Series Audio Capacitors for Speaker Crossovers

 

Speaker crossover networks are one of the main applications for UF Capacitor MPX Series Audio Capacitors.

A crossover capacitor affects the frequency response of the network, so capacitance accuracy is important. Physical dimensions are also relevant because crossover components are often mounted on a dedicated PCB or crossover board.

UF Capacitor MPX Series Audio Capacitors are available in a wide range of values. Current UF Capacitor product listings include values such as:

 

• 0.82μF
• 1.0μF
• 4.7μF
• 5.6μF
• 6.8μF
• 8.2μF
• 10μF
• 15μF

 

For higher-volume speaker production, UF Capacitor can also work from the customer's existing capacitor specification to identify a suitable UF Capacitor MPX Series Audio Capacitor part number.

 

UF Capacitor MPX Series Audio Capacitors for Amplifiers

 

Pre-Amplifiers

Film capacitors can be used for coupling and filtering where the circuit design calls for a non-polarized film capacitor.

Power Amplifiers

The series can be evaluated for coupling, filtering and other audio circuit positions.

Tube Amplifiers

UF Capacitor specifically lists valve amplifiers among the applications for its audio capacitors.

Phono Amplifiers

UF Capacitor also lists phono amplifiers among the intended applications.

The suitability of a particular capacitance and voltage rating depends on the circuit. The capacitor should always be selected from the electrical schematic and the original component specification.

 

UF Capacitor MPX Series Audio Capacitors — Key Specifications

 

Item	UF Capacitor MPX Series Audio Capacitors
Capacitor Type	Metallized Polypropylene Film Capacitor
Construction	Axial Lead
Dielectric	Metallized Polypropylene
Capacitance Range	0.047μF–100μF
Voltage Ratings	250VDC / 400VDC / 630VDC
Tolerance	±3% / ±5%
Operating Temperature	-55°C to +85°C
Mounting	Axial
Application	Audio / Speaker Crossover / Amplifier
Compliance	RoHS / REACH

 

The exact specifications can vary by part number, so the latest datasheet should be used when approving a production component.

 

Why Source UF Capacitor MPX Series Audio Capacitors?

 

For an OEM already buying audio capacitors from European brands, the main reason to evaluate UF Capacitor is usually straightforward: a second source, lower purchasing cost, or a more flexible supply option.

UF Capacitor Capacitors has been manufacturing capacitors since 1995 and states that it operates an ISO9001-certified manufacturing system and an in-house UL-recognized test laboratory.

UF Capacitor MPX Series Audio Capacitors are available for OEM and distributor applications, with standard products as well as support for specific capacitance, voltage and mechanical requirements.

The UF Capacitor website currently lists a 4–6 week lead time for several MPX part numbers, although actual lead time depends on the part number and order quantity.

For customers qualifying a second source, UF Capacitor can provide samples and technical information for comparison with the existing component.

 

UF Capacitor MPX Series Audio Capacitors Cross-Reference at a Glance

 

Existing Brand	Existing Series	UF Capacitor Alternative
Mundorf	MCAP / MKP	UF Capacitor MPX Series Audio Capacitors
Jantzen Audio	CROSS CAP	UF Capacitor MPX Series Audio Capacitors
ClarityCap	CSA	UF Capacitor MPX Series Audio Capacitors
ERSE	PEx Metallized Polyester	UF Capacitor MPX Series Audio Capacitors

 

If you need an exact replacement, send UF Capacitor the original part number, capacitance, voltage, tolerance and dimensions.

 

Frequently Asked Questions

 

What are UF Capacitor MPX Series Audio Capacitors?

UF Capacitor MPX Series Audio Capacitors are metallized polypropylene film capacitors with axial leads, intended for audio applications including loudspeaker crossover networks, pre-amplifiers, power amplifiers and valve amplifiers.

What is an alternative to Mundorf MCAP MKP capacitors?

UF Capacitor MPX Series Audio Capacitors are listed by UF Capacitor Capacitors as an alternative and cross-reference for Mundorf MCAP Series / MKP Series capacitors. The exact UF Capacitor part should be selected according to capacitance, voltage, tolerance and dimensions.

Can UF Capacitor MPX Series Audio Capacitors replace Jantzen Audio CROSS CAP?

Yes. UF Capacitor lists Jantzen Audio CROSS CAP Series as a cross-reference for UF Capacitor MPX Series Audio Capacitors. The individual part specification should be checked before production substitution.

Can UF Capacitor MPX Series Audio Capacitors replace ClarityCap CSA?

UF Capacitor lists ClarityCap CSA Series as a cross-reference for UF Capacitor MPX Series Audio Capacitors. Engineers should verify the electrical and mechanical specifications of the original part before approving a replacement.

Can UF Capacitor MPX Series Audio Capacitors replace ERSE PEX?

UF Capacitor lists ERSE PEX Series Metallized Polyester as a cross-reference. PEX and MPX use different dielectric materials, however, so the replacement should be evaluated for the specific circuit rather than assumed to be an identical component.

What capacitance values are available?

UF Capacitor MPX Series Audio Capacitors cover 0.047μF to 100μF, depending on voltage rating and part number.

What voltage ratings are available?

The standard UF Capacitor MPX Series Audio Capacitors include 250VDC, 400VDC and 630VDC versions.

Are UF Capacitor MPX Series Audio Capacitors suitable for speaker crossovers?

Yes. Loudspeaker passive crossover networks are one of the main applications listed by UF Capacitor for the series.

Are they a drop-in replacement?

Not necessarily. A replacement should be checked for capacitance, voltage, tolerance, dimensions, lead configuration and the requirements of the specific circuit.

 

Conclusion

 

For manufacturers and engineers currently using Mundorf MCAP / MKP, Jantzen Audio CROSS CAP, ClarityCap CSA or ERSE PEX capacitors, UF Capacitor MPX Series Audio Capacitors are worth evaluating as an alternative source.

The series uses metallized polypropylene film and is available from 0.047μF to 100μF, with 250VDC, 400VDC and 630VDC options. It is intended for speaker crossover networks, amplifiers and other audio equipment.

UF Capacitor also publishes the corresponding cross-reference between UF Capacitor MPX Series Audio Capacitors and the four audio capacitor families above.

If you are replacing an existing capacitor, the easiest way to start is to send UF Capacitor the original part number, capacitance, voltage, tolerance and dimensions. UF Capacitor can then recommend the corresponding UF Capacitor MPX Series Audio Capacitors part for sample testing and qualification.

 

If you are interested, visit UF Capacitor Capacitors: https://www.ufcapacitors.com/

Or contact carey@ufcapacitors.com to get quotations and request samples.