Cornell Dubilier Introduces 105 °C Flat Aluminium Electrolytic Capacitor Series
Cornell Dubilier Electronics, Inc. has released a new series of Flatpack, low-profile aluminium electrolytic capacitors, tested and rated for 10,000 hours at 105 °C.
Type MLPS offers high capacitance density in a flat configuration, with voltage ratings up to 450 Vdc and a temperature range from -55 °C to 105 °C. Their rugged construction provides extraordinary life and reliability for the most robust, commercial, and military-grade power supplies.
MLPS Prismatic Flatpack Capacitors
MLPS capacitors are available in four sizes. All cases have a thickness (height profile above the board) of 0.6 inches and a width of 1.8 inches. Case lengths are available from 1.5 to 3.0 inches, with capacitance values ranging from 120 to 51,000 µF and voltage ratings spanning 7.5 Vdc to 450 Vdc. The larger case sizes are typically rated for several amps (RMS). Ripple current ratings can be significantly enhanced by adding one or more heat sinks to their flat sides.
Unlike conventional electrolytics that have a rolled cover, MLPS covers are laser-welded, providing near-hermetic seals that resist electrolyte dry-out. They can be put into service at high altitudes of up to 80,000 feet and have excellent capacitance retention at low temperatures. Various lead types and mounting options are available.
CDE Flatpack Capacitor Applications
CDE’s Flatpack capacitors have been used extensively in commercial and military aircraft, as well as ground-based and shipboard radar for over 25 years. Most applications use either 85 °C or 125 °C rated components. For applied conditions in the 105 °C range, the designer would typically have to specify 125 °C rated parts to meet their life requirements. The use of higher temperature components than needed adds cost and size, making them less efficient.
“The introduction of 105 °C rated Flatpack capacitors will give our customers greater design flexibility, higher performance, and economy in their critical power supply designs,” says Austin Russell, Product Manager for Cornell Dubilier.
One or two MLPS capacitors can be used in place of large banks of surface-mount aluminium electrolytics or axial wet tantalum capacitors, thereby reducing the space, cost, and weight of the customer’s device.
Highlights
- Military-grade flat electrolytics, now optimized for 105 °C applications
- Life tested to 10,000 hours @ 105 °C, Rated Vdc
- High vibration resistance up to 20g (HV Option)
- High reliability burn-in available (48 hrs @ Vr, 105 °C)
- Welded seal resists “dry-out,” typical of conventional electrolytics
Specifications
- Capacitance Range: 120 μF to 51,000 μF
- Capacitance Tolerance: ±20%
- Voltage Range: 7.5 Vdc to 450 Vdc
- Operating Temperature: -55 ºC to 105 ºC
- Endurance Life Test:
- 10,000 Hours 105°C At Rated Ripple Load
- Δ Capacitance ±15%
- ESR < 2X Catalog Limit
- DCL ≤ 0.004 CV μA
Downloads
A Little about CDE & DMTL
DMTL is a fully franchised, authorised Cornell Dubilier distributor.
In February 2015, Cornell Dubilier acquired Illinois Capacitor and it's affiliates. This acquisition brought together two of the leading manufacturers of capacitors for the electronics marketplace. Cornell Dubilier have repositioned the Illinois Capacitor brand under the more universally recognised brand, Cornell Dubilier.
Based in Liberty, SC, Cornell Dubilier specialize in Snap-in Aluminium Electrolytic, AC Power Film Capacitors, DC Film Capacitors, IGBT Snubbers and Mica Capacitors.
Cornell Dubilier focus their engineering capabilities towards advancing Aluminium electrolytic technology, especially in the area of prismatic form factors. Thermal and physical modelling of capacitors using COMSOL and advanced electrical and physical testing and analysis techniques.
Cornell Dubilier consider their key strengths to be their broad portfolio of standard capacitor products for Power Electronics. They excel with applications and custom capacitor designs for critical applications. Their access to CDE engineers, their global logistics, sales and distribution network all lend support to a customer’s decision to approve a CDE Device.
DMTL were appointed Cornell Dubilier (CDE) UK Design Distributors in 2015.
To date designs have included Hi Capacitance Aluminium, Low ESR devices, High Voltage Radials and most recently the Silver Mica Hi Rel Cap ranges.