MCR18 Resistors Low Ohmic Thick Film Chip Resistors MCR18 (3216 size (1206 size) : 1 / 4W) zFeatures 1) Power rating of 1 / 4W 2) Highly reliable chip resistor Ruthenium oxide dielectric offers superior resistance to the elements. 3) Electrodes not corroded by soldering Thick film makes the electrodes very strong. 4) ROHM resistors have approved ISO9001- / ISO/TS 19649- 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 Specifications Power must be derated according to the power derating curve in Figure 1 when ambient temperature exceeds 70°C. 0.25W (1 / 4W) at 70°C POWER LOAD (%) 100 80 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.F 1/4 MCR18 Resistors Table 1 Resistance tolerance Special specification J (±5%) Resistance temperature coefficient (ppm/°C) 0.1 to 0.13 (E24) L 0.15 to 9.1 (E24) S 0.047 to 0.091 (E24) 500±300 L 0.1 to 0.13 (E24) 400±200 L 0.15 to 0.91 (E24) ±250 S 0.047 to 0.091 (E24) L F (±1%) Resistance range (Ω) 400±200 ±250 500±300 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 Guaranteed value Resistor type Item Resistance J : ±5% F : ±1% Test conditions (JIS C 5201-1) JIS C 5201-1 4.5 Load voltage : A Measuring method : measure upper termination by 4 proves. Upper termination Prove Variation of resistance with temperature See Table.1 JIS C 5201-1 4.8 Measurement : +25 / −55 / +25 / +125°C Overload ± (2.0%+0.005Ω) JIS C 5201-1 4.13 Rated voltage (current) ×2.5, 2s. A new uniform coating of minimum of 95% of the surface being immersed and no soldering damage. JIS C 5201-1 4.17 Rosin-Ethanol (25%WT) Soldering condition : 235±5°C Duration of immersion : 2.0±0.5s. ± (1.0%+0.005Ω) No remarkable abnormality on the appearance. JIS C 5201-1 4.18 Soldering condition : 260±5°C Duration of immersion : 10±1s. ± (1.0%+0.005Ω) JIS C 5201-1 4.19 Test temp. : −55°C to +125°C 5cyc ± (3.0%+0.005Ω) JIS C 5201-1 4.24 40°C, 93%RH Test time : 56days ± (3.0%+0.005Ω) JIS C 5201-1 4.25.1 70°C, Rated voltage 1.5h : ON − 0.5h : OFF Test time : 1,000h ± (3.0%+0.005Ω) JIS C 5201-1 4.25.3 155°C Test time : 1,000h to 1,048h ± (0.5%+0.005Ω) JIS C 5201-1 4.29 23°C±5°C Solvent : 2-propanol Without open. JIS C 5201-1 4.33 Solderability Resistance to soldering heat Rapid change of temperature Damp heat, steady state Endurance at 70°C Endurance Component solvent resistance Bend strength of the end face plating Rev.F 2/4 MCR18 Resistors zDimensions (Unit : mm) 1 0.5±0.25 3 1 Resistive element (Oxide metal thick film) 2 Silver thick film electrode 3 Nickel electrode 4 Sn electrode 5 Alumina substrate 6 Overcoating (Glass) 4 1.6±0.15 5 0.55±0.1 0.5±0.25 3.2±0.15 Material No. 2 6 zPackaging Reel Taping P0 P2 P1 φD0 E F W 02 04 06 08 06 D 04 B 02 A 08 B2 A2 Heat crimp cover/Tape Thick paper (Underside paper tape) Chip resistor Square punchout hole mount T2 C (Unit: mm) Label EIAJ ET-7200B compliant (Unit: mm) A φ180 0 −1.5 B φ60 C +1 0 9 +1.0 0 D W F E 8.0±0.3 3.5±0.05 1.75±0.1 A2 D0 P0 P1 P2 T2 +0.1 φ1.5 0 4.0±0.1 4.0±0.1 2.0±0.05 Max. 1.1 1.95 +0.1 −0.05 B2 3.5 +0.15 −0.05 φ13±0.2 Rev.F 3/4 MCR18 Resistors zPart No. Explanation M C R 1 8 Part No. E Z H J L Resistance tolerance Special part number F J ±1% ±5% L 0.1 to 9.1Ω (class F) 0.1 to 0.91Ω (class J) S 0.047 to 0.091Ω Nominal resistance Resistance code, 3 or 4 digits. Resistance Resistance tolerance code +Special P/N FL,FS,JS JL : : 4 digits 3 digits Packaging Specifications Code Part No. Code MCR18 EZH Resistance tolerance J(±5%) F(±1%) Packaging specifications Paper tape (4mm Pitch) Reel φ180mm (7inch) Basic ordering unit(pcs) 5,000 Reel (φ180mm) : Compatible with JEITA standard "EIAJ ET-7200B" : Standard product Rev.F 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 which 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. It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in order to prevent possible accidents that may result in bodily harm or fire caused by component failure. ROHM cannot be held responsible for any damages arising from the use of the products under conditions out of the range of the specifications or due to non-compliance with the NOTES specified in this catalog. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact your nearest sales office. ROHM Customer Support System www.rohm.com Copyright © 2008 ROHM CO.,LTD. THE AMERICAS / EUROPE / ASIA / JAPAN Contact us : webmaster@ rohm.co. jp 21 Saiin Mizosaki-cho, Ukyo-ku, Kyoto 615-8585, Japan TEL : +81-75-311-2121 FAX : +81-75-315-0172 Appendix1-Rev2.0