1/4 www.rohm.com c 2009 rohm co., ltd. all rights reserved. 2009.03 - rev.b low ohmic compact thick film chip resistors UCR18 (3216(1206) size : 1 / 2w) z features 1) chip resistors ideal for current detection. (11m ? to 100m ? ) 2) unique chip and terminal configuration reduces resistance shifting during the mounting process. 3) superior rated power. 4) rohm resistors have approved iso9 001- / iso/ts 16949- certification z ratings design and specifications are subject to change without notice. carefully check the specification sheet before using or orderin g it. 0.5w (1 / 2w) ? 55 c to + 155 c at 70 c item conditions specifications rated power rated voltage operating temperature nominal resistance see table 1. 0 20 40 60 80 100 ? 55 0 70 100 155 ambient temperature ( c) power load (%) fig.1 the voltage rating is calculated by the following equation. e: rated voltage (v) p: rated power (w) r: nominal resistance ( ? ) e= p r power must be derated according to the power derating curve in figure 1 when ambient temperature exceeds 70 c . table 1 resistance tolerance special specification resistance range ( ? ) resistance temperature coefficient (ppm/ c) 0 to 350 0 to 200 0 to 150 0 to 150 0.011 to 0.018 (e24) 0.020 to 0.039 (e24) 0.043 to 0.091 (e24) 0.1 s l f (1%) j (5%) z before using components in circuits where they will be exposed to transients such as pulse loads (short?duration, high? level l oads), 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.
UCR18 data sheet 2/4 www.rohm.com c 2009 rohm co., ltd. all rights reserved. 2009.03 - rev.b z characteristics item test conditions (jis c 5201-1) resistor type guaranteed value resistance variation of resistance with temperature solderability damp heat, steady state endurance at 70 c endurance rapid change of temperature bend strength of the end face plating resistance to solvent resistance to soldering heat overload (2.0% + 0.005 ? ) (1.0% + 0.005 ? ) (3.0% + 0.005 ? ) f : 1% j : 5% without open. jis c 5201-1 4.5 measuring method : measure under termination termin al under termination jis c 5201-1 4.8 measurement : ? 55 / + 25 / + 125 c jis c 5201-1 4.18 soldering condition : 260 5 c duration of immersion : 10 1s. jis c 5201-1 4.24 40 c, 93%rh test time : 56 days (3.0% + 0.005 ? ) (3.0% + 0.005 ? ) (0.5% + 0.005 ? ) (1.0% + 0.005 ? ) 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 4.19 test temp. : ? 55 c to + 125 c 5cyc jis c 5201-1 4.33 jis c 5201-1 4.17 rosinethanol (25%wt) soldering condition : 235 5 c duration of immersion : 2.0 0.5s. jis c 5201-1 4.13 rated voltage (current) 2.5, 2s. see table.1 no remarkable abnormality on the appearance. a new uniform coating of minimum of 95% of the surface being immersed and no soldering damage.
UCR18 data sheet 3/4 www.rohm.com c 2009 rohm co., ltd. all rights reserved. 2009.03 - rev.b z dimensions (unit : mm) no. material resistive element (oxide metal thick film) silver thick film electrode nickel electrode sn electrode alumina substrate overcoating (resin) mark side 1 2 3 4 5 7 6 1.6 0.15 0.55 0.1 0.3 0.2 (the surface) 7 4 3 2 1 6 5 0.9 0.25 (the back) (the cross section) 3.2 0.15 r033 z packaging 0 2 0 4 0 6 0 8 0 2 0 4 0 6 0 8 c abd abcd 13 0.2 p 0 p 2 p 1 e f w t 2 d 0 a 0 b 0 label reel taping eiaj et-7200b compliant thick paper mount (underside paper tape) chip resistor square punchout hole heat crimp cover tape 180 0 ? 1.5 60 +1 0 9 +1.0 0 1.5 +0.1 0 1.95 + 0.1 ? 0.05 3.5 + 0.15 ? 0.05 (unit: mm) (unit: mm) wf ea 0 b 0 d 0 p 0 p 1 p 2 t 2 8.00.3 3.50.05 1.750.1 4.00.1 4.00.1 2.00.05 max. 1.1
UCR18 data sheet 4/4 www.rohm.com c 2009 rohm co., ltd. all rights reserved. 2009.03 - rev.b z part no. explanation uc 1 r 8 e v h j s 0.011 to 0.091 ? 0.1 ? to s l part no. nominal resistance evh 5 , 000 paper tape (4mm pitch) 180mm (7in.) resistance tolerance special part number 1% 5% f j UCR18 p ackaging specifications code r eel ( 180mm) : compatible with jeita standard "eiaj et-7200b" : standard product part no. resistance tolerance code packaging specifications reel basic ordering unit(pcs ) j( 5%) f( 1%) fl, fs, js jl : : 4 digits 3 digits resistance code, 3 or 4 digits. 000 denotes jumper type. resistance tolerance resistance code
r0039 a www.rohm.com ? 2009 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specied herein is subject to change for improvement without notice. the content specied 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 specications, 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 specied 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 specied 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 specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specied 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, re or any other damage caused in the event of the failure of any product, such as derating, redundancy, re 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, fuel-controller 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 specied 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.
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