Conductive Polymer Hybrid Aluminum Electrolytic Capacitor ZS Series
With the growing demand for eco-friendly cars, energy efficiency, and the need to comply with environmental regulations, vehicles are rapidly shifting from gasoline-powered to hybrid electric and electric vehicles. Now, more vehicles are using drive systems consisting of a gasoline engine with motor assistance (48 V system , etc.), and the integration of mechanical and electrical components , which involves switching from mechanical to motor drive and electronic control, is underway. These changes have increased the need for the miniaturization and weight reduction of ECUs and stabilization measures for power supply circuits in response to increases in current values. Capacitors mounted in power supply circuits are now increasingly required to correspond to a large current and capacity. To respond to these requirements, Panasonic has commercialized the surface-mounted ZS Series Conductive Polymer Hybrid Aluminum Electrolytic Capacitors.
■ Term Descriptions
 48 V system
System with a 48 V automotive power supply that significantly contributes to achieving low-fuel consumption during cruising by enabling the miniaturization and weight reduction of mounted lithium ion batteries and drive motors. This system is mounted on mild hybrid electric vehicles.
 Integration of mechanical and electrical components
This refers to the integration of mechanical drive components and the ECU. Mechanical drive components and the ECU used to be physically separated and interconnected via cables, but demand for high-precision control, more freedom in component layout, fewer cables, etc., has now led to the adoption of an integrated configuration of mechanical and electrical components.
Features of ZS Series
Contribute to ECU miniaturization and weight reduction by achieving a larger current.
It was difficult for conventional products, with a maximum size of 10 mm in diameter and 10.2 mm in height, to correspond to a larger current of 100 to 200 A. By adopting a unique new structure and a polymer impregnation method, the new products, with a size of 10 mm in diameter and 16.5 mm in height, lower the capacitor's internal resistance value, achieving a current 2.5 times larger than conventional products. This will contribute to ECU miniaturization and weight reduction.
Ripple current value
ZC 63V : 1400mA ⇒ ZS 63V：3500mA
[2.5 times the conventional product (ZC)]
Contribute to ECU miniaturization and weight reduction by achieving a larger capacity.
The new products have achieved a capacity 1.8 times larger than conventional products by increasing the Aluminum foil area through the adoption of a unique Aluminum foil material technology and a new structure design. This will decrease the quantity of capacitors used and required board space, contributing to ECU miniaturization and weight reduction.
ZC 63V : 82μF ⇒ ZS 63V：150μF
[1.8 times the conventional product (ZC)]
Achieving a larger current and capacitance than conventional products with the same board area decreases the quantity of capacitors used and contributes to reductions in required board space and weight.
Excellent vibration resistance eliminates the need for anti-vibration reinforcement during mounting processes, allowing customers to streamline their production processes.
The conventional ECU board mounting process requires anti-vibration measures, such as anchoring components with adhesives, to make the ECU resistant to vibration if using non-vibration-resistant components. The developed capacitors have achieved anti-vibration performance high enough to withstand a vibration acceleration of 30 G, making such anti-vibration measures unnecessary, thus allowing customers to streamline their production processes.
Vibration acceleration resistance
Conventional structure: 10 G
Vibration-resistant structure: 30 G
[Approx.3 times the conventional structure]
Contributing to the elimination of customers' need to take
measures against vibration during mounting processes
Specification of ZS Series
Category temperature range
-55 °C to 125 °C
Rated voltage range
25 V to 63 V
Rated capacitance range
150 μF to 560 μF
125 °C 4000 h
85 °C 85 % 2000 h
Capacitance / Ripple current (Comparison with ZC Series)
Ripple current (mA) ＠125 ºC
Applications of ZS series
Automotive applications for hybrid electric vehicles, plug-in hybrid electric vehicles, electric vehicles, and gasoline-powered vehicles
・ Integrated starter generator (ISG)
・ Water pump ECU
・ Electric power steering (EPS),
・ Transmission ECU
・ Oil pump ECU
・ Radiator fan control (RFC), etc.
Case study of ZS Series
● 48V system (Inverter Power Supply) Space saving of board