Switch Mode Power Supply Datasheet
pdfCeramic Capacitors
At the heart of any EMI Filter is a Ceramic Capacitor. Our extensive range includes Discoidal Feed-Through Caps, Tubes (F/T and Pi configurations), SMPS caps and Planar caps from leading manufacturer API Technologies. These filters are ideal for EMI/RFI suppression across a range of applications such as Military, Avionics, Industrial, and Medical.
For technical sales of our range of ceramic capacitors contact APC Hi-Rel on 0330 313 3220 or email hi-rel@apcplc.com

Switch Mode Power Supply
High speed Switch Mode Power Supply (SMPS) Ceramic Capacitors have the following characteristics when compared to other capacitive elements:
- Lower Equivalent Series Resistance (ESR)
- Lower Equivalent Series Inductance (ESL)
- Lower ripple voltage and less self heating

Planar Array Ceramic Capacitors
There is a wide range of Planar Array Ceramic Capacitors for EMI filtering. Built using over 25 years expertise in multi-layer ceramic capacitor manufacturing, planar capacitors offer many advantages over stand-alone chip, discoidal or tubular capacitors: low profile, compact, quick assembly time. Designs can incorporate multiple capacitance values, feed-thru holes and ground holes. With a combination of versatility and function, planar ceramic capacitors are quickly becoming the new standard in filtered connectors used in EMI suppression applications.
Features:
- Unparalleled electrical performance & reliability
- Fast prototyping & short product lead times
- 100% electrical & dimensional testing of critical parameters
- Custom packaging to suit end user needs

Discoidal Ceramic Capacitors
Discoidal feed-through ceramic capacitors are the building blocks of the EMI filter industry. Discoidal capacitors provide great versatility in meeting varied voltage, capacitance and dimensional requirements. Our non-polar, multi-layer capacitors are small, reliable and high in dielectric strength. Operational temperatures of –55°C to +125°C are achieved with no voltage de-rating.
Features:
- Excellent high frequency performance
- Low profile design
- Rugged construction
- Low impedance, many paths to ground
- Low inductance, non-polar
- AC applications up to 240V
- DC applications up to 500V
- -55°C to +125°C operation

Tubular Ceramic Capacitor
There is a wide variety of tubular ceramic capacitors, which are small in size, lightweight, non-polar and offer high dielectric strength. Operating temperatures of –55°C to +125°C are achieved with no voltage de-rating. All ceramic capacitors are fired to produce true monolithic structures, which are impervious to moisture and contamination.
Features:
- Ideal for multi-pin connector applications
- High ratio of capacitance to volume
- Low inductance, non-polar
- Impervious to moisture and contamination
- -55°C to +125°C operation
For technical sales and expert advice on our range of high reliability electronic components contact the Hi-Rel team on: