LTR18

High Power Chip Resistors LTR18 (3216 size : 1 / 2W) Features 1) mproved welding strength The structure of longer electrodes provides the wider welding area than the chip resistors with normal electrodes, and this enhanced the solder welding strength. 2) Increased surge-resistance This is achieved by Rohm’s original trimming technology plus resistive element patterning. 3) High-power tolerance Two times of the rated power is guaranteed than the normal-electrode resistors. ROHM resistors are ISO-9001 & ISO/TS16949 certified. Applications Automotive, industrial and power supply. Ratings Design and specifications are subject to change without notice. Carefully check the specification sheet before using or ordering it. Item Rated power Conditions Power must be derated according to the power derating curve in Figure 1 when ambient temperature exceeds 70°C. 100 80 POWER LOAD (%) Specifications 0.5W (1 / 2W) 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. 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 See Table 1. Limiting element voltage 200V D(±0.5%) F(±1%) J(±5%) −55°C to + 155°C www.rohm.com c ○ 2010 ROHM Co., Ltd. All rights reserved. 1/3 2010.06 - Rev.E LTR18 Data Sheet Table 1 Resistance tolerance D (±0.5%) F (±1%) J (±5%) Resistance range (Ω) Resistance temperature coefficient (ppm/°C) 10 to 1M (E24) 1 to 1M (E24) ±100 ±100 ±200 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. Characteristics Item Guaranteed value Resistor type J : ±5% F : ±1% D : ±0.5% See Table.1 ± (2.0%+0.1Ω) 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. ± (1.0%+0.05Ω) ± (3.0%+0.1Ω) Damp heat, steady state ± (3.0%+0.1Ω) Endurance at 70°C ± (3.0%+0.1Ω) Endurance ± (1.0%+0.05Ω) Resistance to solvent ± (1.0%+0.05Ω) Without mechanical damage such as breaks. Test conditions (JIS C 5201-1) Resistance Variation of resistance with temperature Overload JIS C 5201-1 4.5 JIS C 5201-1 4.8 Measurement : −55 / +25 / +125°C JIS C 5201-1 4.13 Rated voltage (current) ×2.5, 2s. Maximum overload voltage : 200V 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. JIS C 5201-1 4.19 Test temp. : −55°C to +125°C 5cyc JIS C 5201-1 4.24 40°C, 93%RH Test time : 1,000h to 1,048h 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 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, Immersion cleaning, 5±0.5min. Solvent : 2-propanol JIS C 5201-1 4.33 Solderability Resistance to soldering heat Rapid change of temperature Bend strength of the end face plating Static electric characteristics ± (5.0%+0.05Ω) EIAJ ED-4701/300 Test method 304 Voltage : 3kv C : 100pF R : 1.5kΩ Apply cycle : 1 time www.rohm.com c ○ 2010 ROHM Co., Ltd. All rights reserved. 2/3 2010.06 - Rev.E LTR18 Data Sheet Dimensions (Unit : mm) 3.2±0.15 0.55±0.1 No. 1 2 Material Resistive element (Oxide metal thick film) Silver thick film electrode Nickel electrode Sn electrode Alumina substrate Overcoating (Resin) 1.6±0.15 1.6±0.15 3 4 5 6 Packaging Reel Taping P0 P2 P1 φD0 E F B0 08 06 04 02 02 04 06 08 0.3±0.2 0.5±0.2 W A B D A0 Heat crimp cover/Tape Thick paper (Underside paper tape) Chip resistor Square punchout hole mount T2 C Label EIAJ ET-7200B compliant (Unit: mm) (Unit: mm) A φ180 0 −1.5 B φ60 +1 0 9 C +1.0 0 D φ13±0.2 W 8.0±0.3 D0 φ1.5 +0.1 0 F 3.5±0.05 P0 4.0±0.1 E 1.75±0.1 P1 4.0±0.1 A0 +0.2 1.65 −0.1 P2 2.0±0.05 B0 2.4 +0.2 −0.1 T2 Max. 1.1 Part designation LTR18 Part No. EZP D F J J Nominal resistance Resistance code, 3 or 4 digits. Resistance tolerance ±0.5% ±1% ±5% Resistance tolerance F,D J : : Resistance code 4 digits 3 digits Packaging Specifications Code Part No. LTR18 Code EZP Resistance tolerance D(±0.5%) F(±1%) J(±5%) 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 www.rohm.com c ○ 2010 ROHM Co., Ltd. All rights reserved. 3/3 2010.06 - Rev.E