1/3 www.rohm.com c 2011 rohm co., ltd. all rights reserved. 2011.12 - rev.g low ohmic thick film chip resistors mcr18 (3216 size (1206 size) : 1 / 4w) ? features 1) power rating of 1 / 4w 2) highly reliable chip resistor ruthenium oxide diel ectric offers superior resistance to the elements. 3) electrodes not corroded by soldering thick film makes the electrodes very strong. 4) rohm resistors have approved iso 9001- / iso/ts 19649- certification. ? ratings design and specifications are subject to change without notice . carefully check the specificat ion sheet before using or orderin g it. 0.25w (1 / 4w) ?55 c to +155 c at 70 c item conditions specifications rated power rated voltage operating temperature nominal resistance see table 1. power must be derated according to the power derating curve in figure 1 when ambient temperature exceeds 70 c . the voltage rating is calculated by the following equation. if the value obtained exceeds the limiting element voltage, the voltage rating is equal to the maximum operating voltage. e: rated voltage (v) p: rated power (w) r: nominal resistance ( ) e= pr 0 20 40 60 80 100 ?55 0 70 100 155 ambient temperat ure (c) power load (%) fig.1 limiting element voltage 1.51(9.1 ) f( 1%) j (5%) 0.15 to 9.1 (e24) (e24) (e24) (e24) 250 0.1 to 0.13 (e24) 400200 0.047 to 0.091 (e24) 500300 0.1 to 0.13 400 200 0.15 to 0.91 250 500300 0.047 to 0.091 table 1 resistance tolerance resistance range () special specification l l s l l s resistance temperature coefficient (ppm/c) ? before using components in circuits where they will be exposed to transients such as pulse loads (short?duration, high?level lo ads), be certain to evaluate the component in the mounted state. in addi tion, the reliability and performance of th is component cannot be guaranteed if it is used with a steady state voltage that is greater than its rated voltage.
2/3 www.rohm.com c 2011 rohm co., ltd. all rights reserved. 2011.12 - rev.g data sheet mcr18 (3216 size (1206 size) : 1 / 4w) ? 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 70c endurance rapid change of temperature bend strength of the end face plating component solvent resistance resistance to soldering heat overload (2.0%+0.005) (1.0%+0.005) (3.0%+0.005) j : 5% f : 1% 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. without open. jis c 5201-1 4.5 jis c 5201-1 4.8 measurement : +25 / ?55 / +25 / +125c load voltage : a measuring method : measure upper termination by 4 proves. jis c 5201-1 4.18 soldering condition : 2605 c duration of immersion : 101s. jis c 5201-1 4.24 40 c, 93%rh test time : 56days (3.0%+0.005) (3.0%+0.005) (0.5%+0.005) (1.0%+0.005) jis c 5201-1 4.25.1 70 c, rated voltage 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 c 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 rosin-ethanol (25%wt) soldering condition : 2355 c duration of immersion : 2.00.5s. jis c 5201-1 4.13 rated voltage (current) 2.5, 2s. upper termination prove ? dimensions (unit : mm) 0.50.25 0.550.1 0.50.25 3.20.15 no. material resistive element (oxide metal thick film) silver thick film electrode nickel electrode sn electrode alumina substrate overcoating (glass) 1 2 3 4 5 6 1 2 4 5 3 1.60.15 6
3/3 www.rohm.com c 2011 rohm co., ltd. all rights reserved. 2011.12 - rev.g data sheet mcr18 (3216 size (1206 size) : 1 / 4w) ? packaging 0 2 0 4 0 6 0 8 0 2 0 4 0 6 0 8 c abd abcd p 0 p 2 p 1 e f w t 2 d 0 a 2 b 2 label 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 13 0.2 4.0 0.1 4.0 0.1 2.00.05 max. 1.1 1.5 +0.1 0 8.0 0.3 3.5 0.05 1.750.1 1.95 +0.1 ?0.05 3.5 +0.15 ?0.05 (unit: mm) (unit: mm) wf ea 2 b 2 d 0 p 0 p 1 p 2 t 2 reel taping ? part no. explanation special part number part no. mc 1 r nominal resistance 8 e z h j l resistance tolerance 1% 5% f j 0.1 to 9.1 (class f) 0.1 to 0.91 (class j) 0.047 to 0.091 l s ezh paper tape (4mm pitch) 180mm (7inch) 5 , 000 mcr18 packaging specifications code reel (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. resistance tolerance + special p/n resistance code
r1120 a www.rohm.com ? 2011 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 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 produc ts. 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, commu- nication 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, 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 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.
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