Ring Varistors For micro-motors VAR-18 series Type: VAR-18-P (Plane surface electrode type) VAR-18-S (Side surface electrode type) Issue date: December 2010 All specifications are subject to change without notice. Conformity to RoHS Directive: This means that, in conformity with EU Directive 2002/95/EC, lead, cadmium, mercury, hexavalent chromium, and specific bromine-based flame retardants, PBB and PBDE, have not been used, except for exempted applications.(1/2) Conformity to RoHS Directive Varistors(SrTiO3) For Micro-motors VAR-18 Series Ring varistors are used in a wide range of applications from micro motor noise absorption to the protection of circuit contacts. TDK has greatly improved the electrical and physical perfor- mances of these varistors to meet the latest demands. This varis- tor line covers the traditional shapes and dimensions as well as the more varied and specialized applications. FEATURES PRODUCT IDENTFICATIONS ELECTRICAL PERFORMANCES VAR-18 (1) (2) (3) (4) (5) (6) (7) The temperature characteristics of the varistor voltage (E10 value) are positive. This prevents the varistor voltage from (1) Series name decreasing at high temperatures and from large currents flowing (2) Outer diameter through the varistor. Therefore, these varistors remove design 080: 8mm obstacles by eliminating the need for setting the room 107: 10.7mm temperature varistor voltage (E10 value) highera measure that (3) Varistor voltage compromises noise reduction levels. 053: 5.3V Furthermore, the VAR-18 series has also eliminated the problem 157: 15.7V of the noise level being amplified at low-temperatures and (4) Varistor voltage tolerance having a negative impact on the life of the motor. Because the VAR-18 series has the same large capacitance as M: 20% (5) Number of electrodes the conventional varistors, it has excellent functions to eliminate 3, 5, 7 and control motor noise in high frequency bands. (6) Electrode location PHYSICAL PERFORMANCES P: Plane Because copper electrodes are used and the heat resistance of S: Side the ceramic elements has been improved, there is no concern for electrode erosion or thermal crack even at the higher (7)TDK classification soldering temperatures that are used in lead-free soldering. PERFORMANCES The ceramic element has excellent flexure strength as is Operating temperature range 25 to +85C suitable for automatic motor assembly. Pulse resistance PRODUCT LINEUP E10, 1015% DC.60V, ON-OFF: 50 cycles The varistors in this series come in a wide range of dimensions Moisture resistance E10, 1010% and so can be accurately used for almost all motors. 602C, 90 to 95(%)RH, 240 hours Soldering heat resistance 320C, 3 seconds E10, 1010% This lineup includes side-surface electrode varistors that can be Flexure strength 9.8N min. used with ultra-compact micro motors. Electrode tensile strength 14.7N min. VARISTOR VOLTAGE TEMPERATURE CHARACTERISTICS 20 10 VAR-18 0 40 20 20 40 60 80 0 Temperature(C) 10 20 Conformity to RoHS Directive: This means that, in conformity with EU Directive 2002/95/EC, lead, cadmium, mercury, hexavalent chromium, and specific bromine-based flame retardants, PBB and PBDE, have not been used, except for exempted applications. All specifications are subject to change without notice. 001-02 / 20101125 / e9c12 var.fm E10(%)