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MVR34
Resistors
Chip Trimmer Potentiometers
MVR34
The MVR34 chip trimmer potentiometer is designed for use in automatic regulators. With its highly stable and reliable ruthenium oxide resistor on an alumina substrate, it offers outstanding dependability in a small, lightweight package.
Features 1) Excellent for use in automatic regulators. 2) Easy to set manually using a regular phillips screwdriver. 3) Superb solder ability thanks to extra soldering electrode. 4) Close match between wiper and dielectric reduces noise. 5) Mounting can be automated by using a carrier tape. 6) Two-digit markings used to indicate resistance. 7) ROHM resistors have approved ISO9001- / ISO/TS 16949- certification. Design and specifications are subject to change without notice. Carefully check the specification sheet 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 70°C.
100 80 60 40 20 0
Specifications 0.1W (1 / 10W) / element at 70°C
POWER LOAD (%)
−55
0
70
100
125
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) P: Rated power (W) R: Nominal resistance (Ω)
Max. operating voltage: 50V
E=
P×R
Nominal total resistance range Total resistance tolerance Resistance variation Effective rotation angle Operating temperature Reactive variable Rotational angle, both ends
100 to 1MΩ (recommended resistance value: E3 series)
(applicable resistance value: E6 series)
±25% B (linear) characteristics 220±20° −55°C to +125°C within 10% (R > 150Ω) within 20% (R ≤ 150Ω)
•Before using components in circuits where they will be exposed to transients such as pulse loads (short-duration, high-level loads), be certain to evaluate the component in the mounted state. In addition, the reliability and performance of this component cannot be guaranteed if it is used with a steady state voltage that is greater than its rated voltage. •The remainder of flux may negatively affect product performance and reliability. So please make sure to wash and remove flux completely washing.
Rev.B
1/4
MVR34
Resistors
Characteristics
Characteristics DC total resistance Contact resistance rate Resistance change characteristics Residual resistance Wiper noise Specifications Within ±25% 3% or less B group OB R < 1kΩ 20Ω or less R ≥ 1kΩ Within 2% of total nominal resistance 5% or less of total nominal resistance, within the effective rotational range JIS C 5261 5.1 JIS C 5261 5.9 JIS C 5261 5.1 Voltage method JIS C 5261 5.1 JIS C 5261 5.8 B method Rotational speed of approx. 10 cycles per minute (with one cycle defined as one round trip) • Measured circuit
Oscilloscope
Test method (JIS C 5261)
Rx
Is
• Measured waveform
Vn
Resistance temperature characteristics Resistance to dry heat Temperature cycling Resistance to humidity (steady state) Endurance (under load in damp environment) Endurance (steady state)
±250ppm / °C Total resistance change rate: ± (5.0%+0.1Ω) Constriction contact resistance rate: 8% or less Total resistance change rate: ± (5.0%+0.1Ω) Constriction contact resistance rate: 8% or less Total resistance change rate: ± (5.0%+0.1Ω) Constriction contact resistance rate: 8% or less Total resistance change rate: ± (5.0%+0.1Ω) Constriction contact resistance rate: 8% or less
Provided that the constant current has been set according to the following: Is: Is = 10 Rx (When Rx ≤ 1kΩ, constant current is defined as Is=10mA) Rx: Nominal resistance of semi-fixed test resistor. Vn: Noise voltage Noise rate = Vn ×100 (%) Is × Rx JIS C 5261 5.3 +25 / −55 / +25 / +125°C JIS C 5261 7.2 125°C Test time: 1,000 to 1,048 hrs. JIS C 5261 7.3 Test temperature: −55°C to +125°C 100cyc. JIS C 5261 7.4 60°C, 95%RH Test time: 1,000 to 1,048 hrs. JIS C 5261 7.6 Rated voltage (current), 60°C, 95%RH 1.5h: ON − 0.5h: OFF Test time: 1,000 to 1,048 hrs. JIS C 5261 7.7 Rated voltage (current), 70°C 1.5h: ON – 0.5h: OFF Test time: 1,000 to 1,048 hrs. JIS C 5261 6.2 JIS C 5261 7.8 After 20 rotations
Total resistance change rate: ± (5.0%+0.1Ω) Constriction contact resistance rate: 8% or less
Rotational torque Endurance (wiper)
1.9~19.7mN · m (20~200gf · cm) Total resistance change rate: Within ±15% Constriction contact resistance rate: 8% or less
Rev.B
2/4
MVR34
Resistors
Characteristics Terminal strength (compression)
Specifications Total resistance change rate: ± (3.0%+0.1Ω) There must be no mechanical damage.
Test method (JIS C 5261) JIS C 5261 6.5 Force (4.9N) is applied from three directions upon the middle of the sides of the sample on the surface being tested, as shown in the illustration on the left.
Terminal strength (bending) Resistance to soldering heat Solderability
Total resistance change rate: ± (3.0%+0.1Ω) There must be no mechanical damage. Total resistance change rate: ± (3.0%+0.1Ω) Constriction contact resistance rate: 5% or less 95% of terminal surface must be covered by new soldering, and there must be no soldering corrosion.
JIS C 5261 6.5 Duration of pressure: 5±1s. Amount of bending: 3mm JIS C 5261 6.7 Soldering conditions: 260±5°C Soldering time: 10±1s. JIS C 5261 6.8 Flux: Rosin methanol or rosin isopropyl alcohol Solder: H63A Soldering conditions: 235±5°C Soldering time: 2.0±0.5s.
Dimensions (Unit: mm)
A F G B
1
C H
T2
I J
6
3
Part Material
96% alumina or greater. Metal glaze composed mainly of RuO2. Stainless steel + nickel plating + gold plating Stainless steel
1 Substrate
P
2 Dielectric paste 3 Electrode #2 (T2) 4 Wiper
O N M
E
4 2
5 Electrodes #1,#3(T1,T3) Ag / Pd, Pt thick film + extra soldering electrode 6 Protective film
Organic film
D
L T1
A 3.0±0.1 I 1.7±0.1
K
(Unit : mm)
5
B 1.5±0.1 J 0.6±0.1
T3
C 1.5±0.1 K 0.7±0.1 D 1.6±0.15 L 1.0±0.15 E 3.5±0.1 M 0.9±0.2 F 3.0±0.1 N 0.75±0.2 G 1.9±0.05 O 0.8±0.2 H 0.5±0.05 P 1.0±0.2
Equivalent circuit
T1
T3
T2
T: terminal
Rev.B
3/4
MVR34
Resistors
Packaging
Reel Taping
P0 P2
φD
0
W F
A
B
D
0.6
0.2
0 .4
0. 8
B0
E
K
0.2
0 .4
0 .6
0. 8
A0
P1
C
La b el
(Unit : mm)
EIAJ ET-7200B compliant
W 8.0±0.2
F 3.5±0.05 P0 4.0±0.1
E 1.75±0.1 P1 4.0±0.1
A0 3.3±0.2 P2 2.0±0.05
B0 3.8±0.2 K 2.2±0.3
(Unit : mm)
D0
A
B
C
D φ13±0.2
0 φ180 −1.5
φ60 +1 0
φ1.5
9 +1.0 0
+0.1 0
Part No. Explanation
Part No.
Packaging / Processing specifications
Resistance tolerance
Reel φ180mm (7in)
Basic ordering unit(pcs)
Nominal resistance
3-digit IEC coding system
Code HXBR
Part No. MVR34
Soldering Reflow soldering
Packaging specifications Embossed tape (4mm Pitch)
N
±25%
2,000
Recommended screwdriver for adjusting MVR resistors
Model Open, type 3 MVR34 Dimensions, configuration Manual adjustment, automatic adjustment
Commercially sold product (Maker)
No.9000 ( + ) 0×30 [Vessel] No.205 ( + ) No.0 [Vessel]
Rev.B
4/4
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 with 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. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.1
