Surface Mount Resistor Wrap-around terminations for soldering CR Series • 0 ohm available Organic Protection • Shorting links available Tin/lead Solder • 1.0 ohms to 100M ohms • Tolerance down to 0.25% • Solder terminations have a nickel barrier layer Thick Film Conductor • Any resistance value available within specified range Nickel Electrical Data IRC Type Power Rating at 70°C (watts) 5% Tol. 2% Tol. 1% Tol. 0.5% Tol. 0.25% Tol. Limiting Element Voltage (volts) CR0805 0.1 1-100M 1-50M 1-20M 1-10M 100-1M 100 Resistance Range (ohms) TCR -55°C to +125°C (ppm/°C) Values Thermal Impedance** (°C/watt) Operating Temp. Range (°C) <10Ω 350; 10 to 100Ω 200; 100 to CR1206 0.25 1-100M 1-50M 1-20M 1-10M 100-1M 1MΩ 100: 200 360 E24 & E96 preferred -55 to 125 (any value to 200 order) >1MΩ 250 * For 10 devices mounted on 50x25mm p.c.b. area ** Zerohm is available Contruction: Thick film resistor material, overglaze and organic protection are screen printed on a 96% alumina substrate. Terminations: Wrap-around terminations on CR resistors have good ‘leach’ resistance properties. They will withstand immersion in solder at 260°C for 30 seconds. Marking: All relevant information is recorded on the primary package or reel. Thickness: The thickness of these devices depend on the size of the chip. The table below shows the standard substrate thickness used (mm). STYLE 0805 1206 Planar 0.4 0.5 Wrap-around 0.4 0.5 F = Wrap-around; G = Planar Gold. Electrical Data Requirements Load at rated power: 1000 hours at 70°C ∆R% Shelf life: 12 months at room temperature ∆R% Derating from rated power at 70°C 2 (5 above 3M3) Actual Maximum Typical 1 0.25 0.1 zero at 125°C Long term damp heat ∆R% 2 1 Temperature rapid change ∆R% 1 0.25 Resistance to solder heat ∆R% 2.5 0.25 Voltage proof volts 0.25 500 General Note IRC reserves the right to make changes in product specification without notice or liability. All information is subject to IRC’s own data and is considered accurate at time of going to print. Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com A subsidiary of TT electronics plc CR Series Issue March 2009 Sheet 1 of 3 Surface Mount Resistor Physical Data Planar Terminations Wrap Around Terminations (3 Faces) C Res ist On T or op Face Res ist On T or op Face C T A L W B T A L W Dimensions (Inches and (mm)) Style L W T 0805 .079 ± .012 (2.0 ± 0.3) .049 ± .008 (1.25 ± 0.2) 1206 .126 ± .016 (3.2 ± 0.4) .063 ± .008 (1.6 ± 0.2) Wrap-around Planar Weight (g) A B* C .027 (.07) .012 ± .006 (0.3 ± 0.15) .035 (0.9min) .012 ± .004 (0.3 ± 0.1) 0.009 .027 (.07) .016 ± .008 (0.4 ± 0.2) .067 (1.7min) .016 ± .006 (0.4 ± 0.15) 0.020 * This dimension determines the number of conductors which may pass under the surface mounted device. APPLICATION NOTES: Mounting This chip resistor is ideally suited for handling by automatic methods due to its rectangular shape and the small dimensional tolerances. Electrical connection to a ceramic substrate or to a printed circuit board can be made by reflow soldering of wrap-around terminations (e.g. suffix ‘F’ in CR0805F). The ‘F’ terminations provide good leach properties and ensure reliable contact. Due to the robust construction, the resistor chip can be immersed completely in the solder bath for 30 seconds at 260°C. This enables the resistor to be mounted on one side of a printed circuit board and other wire-leaded components on the other side. Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com CR Series Issue March 2009 Sheet 2 of 3 Surface Mount Resistor Ordering Data Specify type, reference, etc. as indicated in this example of a CR0805F 8.2M ohms 5% resistor with wrap-around terminations and packed in a plastic bag. Sample Part No. CR 0805 F 1005 J T IRC Type CR Style 0805, 1206 Termination F = Wrap Around, P = Planar Resistance Value (EIA 4-digit code) (≥100Ω - First 3 significant digits plus 4th digit multiplier) Example: 100Ω = 1000; 1000Ω = 1001, 150,000Ω = 1503 (>100Ω - "R" is used to designate decimal) Example: 51Ω = 51R0; 1Ω = 1R00; 0.25Ω = R250 Tolerance F = 1.0%; G = 2.0%; J = 5.0% *Packaging T = Tape Pack (8mm tape) *The preferred methods of packaging are: Gold terminated chips are packed in waffle boxes, chips with wrap-around terminations are supplied tape & reel on .8mm tape. Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com CR Series Issue March 2009 Sheet 3 of 3