KTR18 Resistors Endured high voltage fixed thick film chip resistors KTR18 (3216 size: 1 / 4W) zFeatures 1) Power rating of 1 / 4W 2) Limiting element voltage of KTR series is twice compared with that of MCR series. 3) Highly reliable chip resistor Ruthenium oxide dielectric offers superior resistance to the elements. 4) ROHM resistors have approved ISO–9001 certification. Design and specifications are subject to change without notice. Carefully check the specification sheet before using or ordering it. zRatings 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. If the value obtained exceeds the limiting element voltage, the voltage rating is equal to the maximum operating voltage. E: Rated voltage (V) E= P×R P: Rated power (W) R: Nominal resistance (Ω) Nominal resistance Operating temperature Limiting element voltage 400V See Table 1. −55°C to +155°C 1/6 KTR18 Resistors Table 1 Resistance range (Ω) Resistance temperature coefficient (ppm / °C) F (±1%) 5.6 ≤ R ≤ 10M (E24,96) ±100 J (±5%) 5.6 ≤ R ≤ 10M (E24) ±200 Resistance tolerance 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 Resistance Variation of resistance with temperature Overload Solderability Resistance to soldering heat Guaranteed value Resistor type J : ±5% F : ±1% Test conditions (JIS C 5201-1) JIS C 5201-1 4.5 See Table.1 JIS C 5201-1 4.8 Measurement : −55 / +25 / +125°C ± (2.0%+0.1Ω) JIS C 5201-1 4.13 Rated voltage (current) ×2.5, 2s. Limiting Element Voltage×2 : 800V A new uniform coating of minimum of 95% of the surface being immersed and no soldering damage. ± (1.0%+0.05Ω) 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%+0.05Ω) JIS C 5201-1 4.19 Test temp. : −55°C to +125°C 5cyc Damp heat, steady state ± (3.0%+0.1Ω) JIS C 5201-1 4.24 40°C, 93%RH Test time : 1,000h to 1,048h Endurance at 70°C ± (3.0%+0.1Ω) JIS C 5201-1 4.25.1 Rated voltage (current), 70°C 1.5h : ON − 0.5h : OFF Test time : 1,000h to 1,048h Endurance ± (3.0%+0.1Ω) JIS C 5201-1 4.25.3 155°C Test time : 1,000h to 1,048h Resistance to solvent ± (1.0%+0.05Ω) JIS C 5201-1 4.29 23±5°C, Immersion cleaning, 5±0.5min. Solvent : 2-propanol Bend strength of the end face plating ± (1.0%+0.05Ω) Without mechanical damage such as breaks. JIS C 5201-1 4.33 2/6 KTR18 Resistors zExternal dimensions (Unit : mm) 1 0.3±0.25 3 1 Thick film resistive element 2 Silver thick film electrode 3 Nickel electrode 4 Sn electrode 5 Alumina substrate 6 Overcoating 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 P2 φD2 E 02 04 06 08 06 04 D 02 B 08 F A W B2 A2 Heat crimp cover/Tape Thick paper mount C Chip resistor Square punchout hole T2 Label EIAJ ET-7200B compliant (Underside paper tape) (Unit: mm) (Unit: mm) A φ180 0 −1.5 B φ60 C +1 0 9 +1.0 0 D φ13±0.2 W F E 8.0±0.3 3.5±0.05 1.75±0.1 A2 1.95 +0.1 −0.05 B2 3.5 +0.15 −0.05 D2 P2 P2 P2 T2 +0.1 φ1.5 0 4.0±0.1 4.0±0.1 2.0±0.05 Max. 1.1 3/6 KTR18 Resistors zMakeup of the part number 3-digit or 4-digit IEC coding system Part No. Nominal resistance P K T Packaging / Processing specifications Part No. Code KTR18 Packaging ±1% F Standard ordering unit(pcs) Paper tape EZP Resistance tolerance ±5% J 5,000 zDimensions 1.80 3.40 JIS C 5201-1 4.4 SAMPLE SIZE : n=20pcs MICROMETER 3.35 3.20 3.15 0.65 THICKNESS (mm) WIDTH (mm) 3.25 1.65 1.60 1.55 0.60 0.55 0.50 3.10 1.50 0.45 3.05 1.45 0.40 3.00 1.40 1 10 100 1k 10k 100k 1M 10M JIS C 5201-1 4.4 SAMPLE SIZE : n=20pcs MICROMETER 0.70 1.70 3.30 LENGTH (mm) 0.75 JIS C 5201-1 4.4 SAMPLE SIZE : n=20pcs MICROMETER 1.75 1 10 100 1k 10k 100k 1M 10M 0.35 1 10 100 1k 10k 100k 1M 10M RESISTANCE (Ω) RESISTANCE (Ω) RESISTANCE (Ω) Fig.2 Dimensions (length) Fig.3 Dimensions (width) Fig.4 Dimensions (thickness) 6.0 6.0 JIS C 5201-1 4.5 SAMPLE SIZE : n=20pcs 20°C 65%RH 4.0 DC RESISTANCE (%) DC RESISTANCE (%) 4.0 2.0 0.0 −2.0 2.0 0.0 −2.0 −4.0 −4.0 −6.0 −6.0 10 100 1k 10k 100k 1M 10M JIS C 5201-1 4.5 SAMPLE SIZE : n=20pcs 20°C 65%RH 10 100 1k 10k 100k 1M 10M TEMPERATURE COEFFICIENT (ppm/°C) zElectrical characteristics 500 JIS C 5201-1 SEC 4.8 SAMPLE SIZE : n=10pcs 25°C / −55°C 25°C / 125°C 400 300 200 100 0 −100 −200 −300 −400 −500 10 100 1k 10k 100k 1M 10M RESISTANCE (Ω) RESISTANCE (Ω) RESISTANCE (Ω) Fig.5 Resistance (J class) Fig.6 Resistance (F class) Fig.7 Variation resistance with temperature (J class) 4/6 KTR18 300 3.0 2.0 100 1.0 0 −2.0 −300 −3.0 −400 −4.0 10 100 1k 10k 100k 1M −5.0 10M 80 70 60 50 40 10 100 1k 10k 100k 1M 20 10M 10 100 1k 10k 100k 1M RESISTANCE (Ω) Fig.8 Variation resistance with temperature (F class) Fig.9 Overload Fig.10 Solderability 1.5 0.5 0.0 0.0 −1.0 −1.5 −1.5 −2.0 −2.0 −2.5 −2.5 10 100 1k 10k 100k 1M 10M 2.0 −0.5 −1.0 JIS C 5201-1 SEC 4.24 SAMPLE SIZE : n=10pcs 40°C 93%RH WITH NO LOAD 1,000h 3.0 ∆R/R (%) 0.5 ∆R/R (%) 1.0 −0.5 JIS C 5201-1 SEC 4.19 SAMPLE SIZE : n=10pcs −55°C / 125°C 1000cyc 2.0 1.0 10M 4.0 2.5 JIS C 5201-1 SEC 4.18 SAMPLE SIZE : n=10pcs SOLDERING CONDITION : 260°C 10s 1.5 1.0 0.0 −1.0 −2.0 −3.0 10 100 1k −4.0 10k 100k 1M 10M 10 100 1k 10k 100k 1M 10M RESISTANCE (Ω) RESISTANCE (Ω) RESISTANCE (Ω) Fig.11 Resistance to soldering heat Fig.12 Rapid change of temperature Fig.13 Damp heat , Steady state 4.0 4.0 JIS C 5201-1 SEC 4.25.1 SAMPLE SIZE : n=10pcs 70°C 1,000h THE RATED VOLTAGE 1.5h on, 0.5h off 2.0 3.0 ∆R/R (%) 1.0 0.0 −1.0 2.0 JIS C 5201-1 SEC 4.25.3 SAMPLE SIZE : n=10pcs 155°C WITH NO LOAD 1,000h 2.0 1.0 1.0 0.5 0.0 −1.0 0.0 −0.5 −2.0 −2.0 −1.0 −3.0 −3.0 −1.5 10 100 1k 10k 100k 1M 10M −4.0 1 10 100 1k 10k 100k 1M 10M JIS C 5201-1 SEC 4.29 SAMPLE SIZE : n=10pcs IPA, 5min. 1.5 ∆R/R (%) 3.0 −4.0 JIS C 5201-1 4.17 SAMPLE SIZE : n=10pcs SOLDERING CONDITION : 235°C 2s 30 RESISTANCE (Ω) 2.0 ∆R/R (%) 90 RESISTANCE (Ω) 2.5 ∆R/R (%) 0.0 −1.0 −200 −500 JIS C 5201-1 4.13 SAMPLE SIZE : n=10pcs RATED VOLTAGE×2.5 TIMES : 2s MAXIMUM OVERLOAD VOLTAGE : 800V 4.0 200 −100 100 5.0 JIS C 5201-1 SEC 4.8 SAMPLE SIZE : n=10pcs 25°C / −55°C 25°C / 125°C 400 SOLDERD PERCENTAGE (%) 500 ∆R/R (%) TEMPERATURE COEFFICIENT (ppm/°C) Resistors −2.0 10 100 1k 10k 100k 1M 10M RESISTANCE (Ω) RESISTANCE (Ω) RESISTANCE (Ω) Fig.14 Endurance (at70°C) Fig.15 Endurance Fig.16 Component solvent resistance 5/6 KTR18 Resistors 2.5 JIS C 5201-1 SEC 4.33 SAMPLE SIZE : n=10pcs ENDURANCE WITH 90mm WIDTH 2.0 1.5 ∆R/R (%) 1.0 0.5 0.0 −0.5 −1.0 −1.5 −2.0 −2.5 10 100 1k 10k 100k 1M 10M RESISTANCE (Ω) Fig.17 Bend strength of the end face plating 6/6 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 with 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. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction. Appendix1-Rev1.1