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UCR10
Resistors
Low Ohmic Compact Thick Film Chip Resistors
UCR10 (2012 size : 1 / 3W)
zFeatures 1) Superior rated power. 2) Stable, low resistance guaranteed regardless of the surrounding environment. 3) Thick film resistive elements were used to create this lineup of ultra-low resistance products ranging from 11mΩ to 100Ωm. 4) Chip resistors ideal for current detection. 5) ROHM resistors have approved ISO9001- / ISO/TS 16949- certification.
zRatings Design and specifications are subject to change without notice. Carefully check the specification sheet before using or ordering it.
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
POWER LOAD (%)
Specifications 0.33W (1 / 3W) at 70°C
60 40 20 0
−55
0
70
100
155
AMBIENT TEMPERATURE (°C)
Fig.1 Rated voltage The voltage rating is calculated by the following equation. E: Rated voltage (V) E= P×R P: Rated power (W) R: Nominal resistance (Ω)
Nominal resistance Operating temperature
See Table 1. −55°C to + 155°C
Rev.A
1/4
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UCR10
Resistors
Table 1 Resistance range (Ω) Resistance tolerance Special specification Resistance temperature coefficient (ppm/°C)
0.011 to 0.018 (E24) 0.020 to 0.047 (E24) 0.051 to 0.091 (E24) 0.1
J (±5%) S F (±1%) J (±5%) L
250±100 0 to 250 0 to 150 0 to 150
zBefore 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.
zCharacteristics
Item Guaranteed value Resistor type Test conditions (JIS C 5201-1) JIS C 5201-1 4.5 Measuring method : Measure under termination Resistance F : ±1% J : ±5% Under termination Terminal
Variation of resistance with temperature Overload
See Table.1
JIS C 5201-1 4.8 Measurement : −55 / +25 / +125°C JIS C 5201-1 4.13 Rated voltage (current) × 2.5, 2s. JIS C 5201-1 4.17 Rosin·Ethanol (25%WT) Soldering condition : 235±5°C Duration of immersion : 2.0±0.5s. JIS C 5201-1 4.18 Soldering condition : 260±5°C Duration of immersion : 10±1s. JIS C 5201-1 4.19 Test temp. : −55°C to +125°C 5cyc JIS C 5201-1 4.24 40°C, 93%RH Test time : 56 days JIS C 5201-1 4.25.1 Rated voltage (current), 70°C 1.5h : ON − 0.5h : OFF Test time : 1,000h JIS C 5201-1 4.25.3 155°C Test time : 1,000h to 1,048h JIS C 5201-1 4.29 23±5°C Solvent : 2-propanol JIS C 5201-1 4.33
± (2.0%+0.005Ω)
Solderability
A new uniform coating of minimum of 95% of the surface being immersed and no soldering damage. ± (1.0%+0.005Ω) No remarkable abnormality on the appearance. ± (1.0%+0.005Ω)
Resistance to soldering heat Rapid change of temperature
Damp heat, steady state
± (3.0%+0.005Ω)
Endurance at 70°C
± (3.0%+0.005Ω)
Endurance
± (3.0%+0.005Ω)
Resistance to solvent Bend strength of the end face plating
± (0.5%+0.005Ω)
Without open.
Rev.A
2/4
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UCR10
Resistors
zDimensions (Unit : mm)
(The surface)
R033
0.24±0.20
1.25±0.10
No.
1 2 3 4
Material Resistive element (Oxide metal thick film) Silver thick film electrode Nickel electrode Sn electrode Alumina substrate Overcoating (Resin) Mark side
(The back)
0.50±0.20
5
5
(The cross section)
4 3 2
7
6
0.55±0.10
7
2.00±0.10
1 6
zPackaging
Reel Taping
P0 P2 P1 φD0 E F B0
08 06 04 02 02 04 06 08
W
A
B
D
A0
Heat crimp cover tape Thick paper mount
C
(Underside paper tape) Chip resistor Square punchout hole
T2
Label EIAJ ET-7200B compliant
(Unit: mm)
(Unit: mm) A φ180 0 −1.5 B φ60 +1 0 9 C +1.0 0 D φ13±0.2
W 8.0±0.3 D0 φ1.5 +0.1 0
F 3.5±0.05 P0 4.0±0.1
E 1.75±0.1 P1 4.0±0.1
A0 +0.2 1.65 −0.1 P2 2.0±0.05
B0 2.4 +0.2 −0.1
T2 Max. 1.1
Rev.A
3/4
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UCR10
Resistors
zPart No. Explanation
U C R 1 0
Part No.
E V H
Resistance tolerance
F J
J
S
Special part number
S 0.011 to 0.091Ω L
Nominal resistance
Resistance code, 3 or 4 digits. 000 denotes jumper type. Resistance Resistance tolerance code FL, FS, JS : 4 digits JL : 3 digits
±1% ±5%
0.1Ω to
Packaging Specifications Code
Part No. UCR10 Code EVH Resistance tolerance J(±5%) F(±1%) Packaging specifications Paper tape (4mm Pitch) Reel φ180mm (7in.) Basic ordering unit(pcs) 5,000
Reel (φ180mm) : Compatible with JEITA standard "EIAJ ET-7200B" : Standard product
Rev.A
4/4
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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.