Murata introduces lead type multilayer ceramic capacitors for 200°C automobile use

1/12/2017

Murata Manufacturing Co., Ltd.
President/Statutory Representative Director:
Tsuneo Murata

Overview

Murata Manufacturing Co., Ltd. developed the RHS series of lead type multilayer ceramic capacitors for automobile use at maximum usage temperature of 200°C. The rated voltage lineup includes 200Vdc and 500Vdc, and the range will be expanded hereafter. These products are primarily meant for use in equipment located in severe temperature environments such as the engine compartment  of an automobile. Production starts in May 2017. 

Background

A power train control system uses a DC motor drive to increase control in order to improve the fuel economy of an automobile. A capacitor is used to suppress the electrical noise generated by this DC motor. The automobile control equipment is mounted in an extreme environment, where temperatures can approach 200°C for short periods of time. A high degree of durability is needed for a capacitor that is implemented in this environment. The new Murata product applies a coating of newly developed heat resistant resin around a highly heat resistant multilayer ceramic capacitor, allowing use at a 200°C maximum temperature. The company expects to expand sales of products for equipment mounted in high temperature environments such as engine rooms.

Features

Complies with AEC-Q200*1 and therefore the lead wire type capacitor can be connected by welding or “crimping*2” close to a noise generating source.
Passes the extreme surge test of the ISO7637-2*3 standard.

Electrical Performance

Usage Temperature Range: -55°C~200°C
Temperature Characteristics: 7J Characteristic (See table below.)

Standard Temperature
(°C)
Temperature Range
(°C)
Temperature Coefficient
(ppm/°C)
25 -55~25 -750 +120/-347
25~125 -750 ±120
125~200 -750 +347/-120
Rated Voltage: 200Vdc and 500Vdc
Electrostatic Capacity: 100pF~0.01uF

External Dimensions

LxW: 4.0×3.5mm or 5.5×4.0mm (Determined by the combination of rated voltage and electrostatic capacity.)
F: Can be selected from either 2.5mm or 5.0mm

About Voltage/Temperature Derating

When the temperature of the product is to exceed 150°C, usage should be with reduction of the voltage to be applied to the capacitor for the rated voltages shown below.

Explanation of Terms

*1 AEC-Q200: Test standards for reliability sought in automobile electrical parts, as decided by the Automotive Electronics Council.

*2 Crimping: A metal component or fitting is fastened using a pliers or custom tool without using an adhesive

*3 ISO7637-2: Test standards for checking durability against noise generated by automobile electrical equipment.


Murata in Brief

Murata Manufacturing Co., Ltd. is a worldwide leader in the design, manufacture and sale of ceramic-based passive electronic components & solutions, communication modules and power supply modules. Murata is committed to the development of advanced electronic materials and leading edge, multi-functional, high-density modules. The company has employees and manufacturing facilities throughout the world. For more information, visit Murata's website at www.murata.com