Fixed Thick Film Low Ohmic Chip Resistors For Current Detection UCR03 (1608 size : 1 / 4W•1 / 5W) Features 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 20m to 910m. 4) Chip resistors ideal for current detection. 5) ROHM resistors have approved ISO9001- / ISO/TS 16949- certification. Ratings Design and specifications are subject to change without notice. Carefully check the specification sheet before using or ordering it. Item Rated power Conditions Specifications Power must be derated according to the power derating curve in Figure 1 when ambient temperature exceeds 70°C. 100 (0.02Ω < R <0.2Ω) 0.2W (1 / 5W) (0.22Ω 80 POWER LOAD (%) 0.25W (1 / 4W) < R < 0.91Ω) 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= P×R I= P R Nominal resistance E: Rated voltage (V) I : Rated current (A) P: Rated power (W) R: Nominal resistance (Ω) See Table 1. Operating temperature −55°C to + 155°C Table 1 Resistance range (Ω) 0.020 to 0.047 (E24) 0.051 to 0.091 (E24) 0.1 to 0.91(E24) Resistance tolerance Special specification J (±5%) S F (±1%) Resistance temperature coefficient (ppm/°C) 0 to 250 0 to 200 0 to 150 L 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. www.rohm.com c 2011 ROHM Co., Ltd. All rights reserved. ○ 1/4 2011.10 - Rev.B UCR03 Data Sheet Characteristics Guaranteed value Item Test conditions (JIS C 5201-1) Resistor type JIS C 5201-1 4.5 Measuring method : Measure under termination Variation of resistance with temperature Resistance to soldering heat Terminal JIS C 5201-1 4.8 Measurement : −55 / +25 / +125°C See Table.1 JIS C 5201-1 4.13 Rated voltage (current) × 2.5, 2s. ±2.0% Overload Solderability Under termination F : ±1% J : ±5% Resistance A new uniform coating of minimum of 95% of the surface being immersed and no soldering damage. ±1.0% No remarkable abnormality on the appearance. 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. Rapid change of temperature ±1.0% JIS C 5201-1 4.19 Test temp. : −55°C to +125°C 5cyc Damp heat, steady state ±3.0% JIS C 5201-1 4.24 40°C, 93%RH Test time : 1,000h to 1,048h Endurance at 70°C ±3.0% JIS C 5201-1 4.25.1 Rated voltage (current), 70°C 1.5h : ON − 0.5h : OFF Test time : 1,000h Endurance ±3.0% JIS C 5201-1 4.25.3 155°C Test time : 1,000h to 1,048h Resistance to solvent ±0.5% Bend strength of the end face plating www.rohm.com c 2011 ROHM Co., Ltd. All rights reserved. ○ JIS C 5201-1 4.29 23±5°C Immersion cleaning, 5±0.5min Solvent : 2-propanol Without open. JIS C 5201-1 4.33 2/4 2011.10 - Rev.B UCR03 Data Sheet Dimensions (Unit : mm) 0.020Ω≦R＜0.050Ω 0.050Ω＜R≦0.91Ω （上面） 0.87±0.1 0.87±0.1 （上面） 1.6±0.1 1.6±0.1 （下面） 0.87±0.1 0.87±0.1 （下面） 1.6±0.1 1.6±0.1 1 2 3 （断面図） 0.5±0.1 5 6 7 8 0.45±0.2 0.45±0.2 材 1 アルミナ基板 2 銀系厚膜電極 3 抵抗体 4 オーバーコート ニッケル／クロム皮膜電極 6 ニッケル皮膜電極 7 銅皮膜電極 8 錫皮膜電極 www.rohm.com 4 料 5 c 2011 ROHM Co., Ltd. All rights reserved. ○ 2 6 7 8 4 No. 1 5 0.5±0.1 3 （断面図） 3/4 2011.10 - Rev.B UCR03 Data Sheet Part No. Explanation U C R 0 3 E W P Part No. J Resistance tolerance F J S Nominal resistance Special part number ±1% ±5% S 0.020 to 0.091Ω L Resistance code, 3 or 4 digits. Resistance Resistance tolerance code FL, FS, JS : 4 digits JL : 3 digits 0.1Ω to 0.91Ω Packaging Specifications Code Part No. Resistance tolerance J(±5%) F(±1%) Code UCR03 Packaging specifications Reel Basic ordering unit(pcs) Remarks EWP Paper tape (4mm Pitch) φ180mm (7in.) Paper tape (4mm Pitch) φ180mm (7in.) 5,000 5,000 0.020 to 0.047Ω EVP 0.051 to 0.91Ω Reel (φ180mm) : Compatible with JEITA standard "EIAJ ET-7200B" : Standard product Packaging Reel Taping P0 P2 φD0 E F 02 04 08 W 08 06 04 D 02 B 06 A0 A B0 Top tape P1 Base paper Cavlty (Bottom tape) Components T2 C Label EIAJ ET-7200B compliant (Unit: mm) (Unit: mm) A φ180 B 0 −1.5 φ60 C +1 0 9 +1.0 0 D φ13±0.2 www.rohm.com c 2011 ROHM Co., Ltd. All rights reserved. ○ 4/4 W F E A0 B0 8.0±0.3 3.5±0.05 1.75±0.1 1.1±0.1 1.9±0.1 D0 P0 P1 P2 T2 +0.1 φ1.5 0 4.0±0.1 4.0±0.05 2.0±0.05 Max. 1.1 2011.10 - Rev.B Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. The Products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices). The Products specified in this document are not designed to be radiation tolerant. While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or malfunction for a variety of reasons. Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us. ROHM Customer Support System http://www.rohm.com/contact/ www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. R1120A