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MVR21
Resistors
Chip trimmer potentiometers
MVR21
Features 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.
Ratings
Item Rated power Conditions Power must be derated according to the power derating curve in Figure 1 when ambient temperature exceeds 70C.
100 80 60 40 20 0
Specifications 0.15W (3 / 20W) / element at 70C
POWER LOAD (%)
- 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= PxR Nominal total resistance range Total resistance tolerance Resistance variation Operating temperature P : Rated power (W) R : Nominal resistance () Max. operating voltage 50V
100 to 2.2M (applicable resistance value : E6 series) 25% B (linear) characteristics -55C to +155C
(recommended resistance value : E3 series)
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MVR21
Resistors
Dimensions (Unit: mm)
Name of part

Material Alumina substrate Thick film resistive element Metal Metal and Ni plating and Sn plating
Substrate Resistance paste Wiper 2nd Terminal (T2)
1st,3rd Terminals (T1, T3) Metal and Ni plating and SnAgCu solder Protective film Insulator
(Unit : mm)
A 2.0 +0.15 -0.05 H 0.90.1
(B) I 1.00.1
C J 0.550.1
D K 0.60.2
E L 0.750.1
F
+0.05 0
G 0.75
+0.15 -0
(1.350.2) 1.50.2 2.850.15
0.4 +0.05 1.35 0
M 1.020.1
N 0.480.1
Equivalent circuit
T1
T3
T2
T : terminal
Packaging
Reel Taping
P0
P2
D0
A
B
D
0.4
0.6
0.2
0. 8
W
F
B0
E
0.8
0.2
0 .4
0 .6
A0
C
P1
K
Compatible with JEITA standard "EIAJ ET-7200B"
(Unit : mm) A 180 0 -3 B 60 +1 0 C 9 1.0/-0 D 13 0.2
W D0 1.5 + 0.1 0 F P0 4.0 0.1 E A0
(Unit : mm)
B0 8.0 0.2 3.5 0.05 1.75 0.1 2.45 0.1 3.2 0.1 P1 P2 1.8 K
+0 -0.1
4.0 0.1 2.0 0.05
2/3
MVR21
Resistors
Part No. Explanation
Part No.
1
Packaging / Processing specifications
I
Resistance tolerance
Reel 180mm(7inch) Basic ordering unit(pcs) 3,000 N 25%
Nominal resistance
3-digit IEC coding system Recommended resistance value : E3 series Applicable resistance value : E6 series
Part No. MVR21
Code Processing specifications Packaging specifications IXBR Reflow soldering Paper tape (4mm Pitch)
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 (c) 2007 ROHM CO.,LTD.
THE AMERICAS / EUPOPE / ASIA / JAPAN
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TEL : +81-75-311-2121 FAX : +81-75-315-0172
Appendix1-Rev2.0

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