MVR21 Resistors Chip trimmer potentiometers MVR21 zFeatures 1) Extremely small size and light weight facilitate the assembly of light, thinner, and smaller equipment. 2) Close match between wiper and resistive element reduces wiper noise. 3) Ruthenium oxide resistor material, with superb stability and resistance to humidity and the elements, offers the same outstanding reliability of our existing product (MVR22). 4) Open design for reflow soldering. 5) Cross groove for easy adjustment. 6) Protective film prevents short circuits due to terminal contact. 7) ROHM resistors have approved ISO-9001 / ISO/TS 16949 certification. Design and specifications are subject to change without notice. Carefully check the specification sheet supplied with the product before using or ordering it. zRatings Item Rated power Conditions Specifications Power must be derated according to the power derating curve in Figure 1 when ambient temperature exceeds 70˚C. 0.15W (3 / 20W) / element at 70˚C POWER LOAD (%) 100 80 60 40 20 0 – 55 0 70 100 125 155 AMBIENT TEMPERATURE ( ˚C) Fig.1 Rated voltage The voltage rating is calculated by the following equation. If the value obtained exceeds the maximum operating voltage, the voltage rating is equal to the maximum operating voltage. E : Rated voltage (V) E= P×R P : Rated power (W) R : Nominal resistance (Ω) Max. operating voltage 50V Nominal total resistance range 100 to 2.2MΩ (applicable resistance value : E6 series) Total resistance tolerance ±25% Resistance variation B (linear) characteristics Operating temperature −55˚C to +155˚C (recommended resistance value : E3 series) 1/3 MVR21 Resistors zDimensions (Unit: mm) Name of part ③ ① ⑤ Material Substrate Alumina substrate Resistance paste Thick film resistive element Wiper Metal 2nd Terminal (T2) Metal and Ni plating and Sn plating ② 1st,3rd Terminals (T1, T3) Metal and Ni plating and SnAgCu solder Protective film Insulator (Unit : mm) ④ A (B) 2.0 +0.15 −0.05 C D (1.35±0.2) 1.5±0.2 2.85±0.15 E F 0.4 +0.05 1.35 0 G +0.05 0 0.75 +0.15 −0 H I J K L M N 0.9±0.1 1.0±0.1 0.55±0.1 0.6±0.2 0.75±0.1 1.02±0.1 0.48±0.1 zEquivalent circuit T1 T3 T2 T : terminal zPackaging Reel Taping P2 E F B0 W 0.4 0.2 0. 8 0 .6 0 .4 D 0.8 B 0.2 A 0.6 φ D0 P0 K P1 A0 C ラベル Compatible with JEITA standard "EIAJ ET-7200B" (Unit : mm) (Unit : mm) A φ180 B 0 −3 φ60 +1 0 C D 9 ± 1.0/−0 φ13 ± 0.2 W F E A0 B0 8.0 ± 0.2 3.5 ± 0.05 1.75 ± 0.1 2.45 ± 0.1 3.2 ± 0.1 D0 P0 φ1.5 + 0.1 0 4.0 ± 0.1 P1 K P2 4.0 ± 0.1 2.0 ± 0.05 1.8 +0 −0.1 2/3 MVR21 Resistors zPart No. Explanation Part No. 1 I Packaging / Processing specifications Part No. Code Processing specifications Packaging specifications MVR21 IXBR Reflow soldering Paper tape (4mm Pitch) Resistance tolerance Reel Basic ordering unit(pcs) φ180mm(7inch) 3,000 N ± 25% Nominal resistance 3-digit IEC coding system Recommended resistance value : E3 series Applicable resistance value : E6 series 3/3 Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document are no antiradiation design. The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of which would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in order to prevent possible accidents that may result in bodily harm or fire caused by component failure. ROHM cannot be held responsible for any damages arising from the use of the products under conditions out of the range of the specifications or due to non-compliance with the NOTES specified in this catalog. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact your nearest sales office. ROHM Customer Support System www.rohm.com Copyright © 2007 ROHM CO.,LTD. THE AMERICAS / EUPOPE / ASIA / JAPAN Contact us : webmaster@ rohm.co. jp 21, Saiin Mizosaki-cho, Ukyo-ku, Kyoto 615-8585, Japan TEL : +81-75-311-2121 FAX : +81-75-315-0172 Appendix1-Rev2.0