SMHP35 Series Power Resistor SMHP35 Series • • • • • • 270°C reflow compatible TO-263 housing Low inductance and capacitance for high frequency circuits 35W power rating High stability film resistance elements RoHS compliant IRC’s SMHP series resistors satisfy demanding applications for accurate and stable power resistors housed in the convenient TO-263 case. The resistance element is isolated from the mounting tab by an alumina ceramic layer, providing very low thermal resistance and ensuring high insulation resistance between terminals and metal back plate. The non-inductive design makes these products especially useful in high frequency and high speed pulse applications. Electrical Data Power Rating1 Heatsink2 35W Free Air3 2.5W Voltage Rating4 500 V Thermal Resistance 3.3°C/W Resistance Range Tolerances Nominal Resistance Series5 Typ. TCR (ppm/°C)6 Min Max 0.01Ω 0.09Ω ±5% E6 ±250 0.1Ω 9.1Ω ±1%, ±5% E12 ±100 10Ω 51KΩ ±1%, ±5% E24 ±50 Maximum current 25 amps Power rating based on 25°C case temperature Power rating based on 25°C ambient temperature 4 Maximum voltage 500V or √P x R 5 Contact factory for availability of resistance or tolerance values outside this range 6 See TCR Chart for resistance values below 0.2ohms Inductance Capacitance <10nH <2pF 1 2 Temperature Rise Data 3 120 Resistor Film Temp Rise with Respect to Tab Temp ∆Tfilm (°C) 100 80 60 40 20 0 0 Pulse Energy Durability 10 15 20 Power (Watts) 25 30 35 Power Derating Data 10K 100 Damage Level 1K % of Rated Power Pulse Peak (Watts) 5 100 Safety Zone 10 1µ 10µ 100µ 1m 10m 100m Pulse Width (seconds) 50 10 25° Tab Temperature (°C) 155° 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. Advanced Film 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 SMHP35 Series Issue June 2009 R2 SMHP35 Series Power Resistor Physical Data N G B E F M J L H K 11.1 A C 10.16 16.0 Case, Epoxy UL94-V0 Leads, Sn Plated Cu Leads Joint, 85% Pb-Sn Solder Resistor, Ni-Cr or RuO Substrate, Alumina Joint, 85% Pb-Sn Solder 1.60 Tab, Matte Sn Plated Cu 3.50 5.08 Insulated Between Tab and Resistor Recommended minimum footprint dimensions. All dimensions are in millimeters (mm). Lead & Tab Material Tin Plated Copper Part Weight 1.5g Dim In (nom) mm A 0.398 10.1 ±0.2 B 0.406 10.3 ±0.2 C 0.177 4.5 ±0.2 E 0.197 5.0 ±1.0 F 0.098 2.5 ±0.5 G 0.087 2.2 ±0.2 H 0.108 2.75 ±0.2 J 0.020 0.5 ±0.05 K 0.030 0.75 ±0.05 L 0.059 1.5 ±0.05 M 0.200 5.08 ±0.1 N 0.059 1.5 ±0.05 Environmental Data Test Method Specification - Performance Load Life 1,000 Hours @ 25°C; 90 minutes on, 30 minutes off ±(1.0% + 1mΩ) Humidity 1000 hours; 40°C, 90-95% RH, 0.1W DC ±(1.0% + 1mΩ) 5 cycles; 30 minutes @ -55°C, 30 minutes at +155°C ±(0.25% + 1mΩ) 2X Rated Power, not to exceed 1.5X Rated Voltage for 5 seconds, 25° w/ Heat Sink ±(0.25% + 1mΩ) 10 cycles; X, Y, Z axis, amplitude 0.75mm, 1002000Hz sweep/min ±(0.25% + 1mΩ) Between terminals and tab >1000MW Terminals to tab; 60sec, 1mA 2000 volts AC 350 ± 5°C for 3 seconds ±(0.10% + 1mΩ) 230 ± 5°C, 3sec. >95% coverage Temperature Cycle Short Time Overload Vibration Insulation Resistance Dielectric Withstanding Voltage Resistance to Solder Heat Solderability Operating Temperature Range Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com -55°C to +155°C SMHP35 Series Issue June 2009 R2 SMHP35 Series Power Resistor Typical TCR For Low Values Solder Reflow Profile 60-80sec above 217°C 300 250 250 200 Temp (°C) TCR (ppm/°C) 0 to 100°C 350 150 100 50 Preheat 200 150 150-200°C 120-180sec 100 Peak 20-40sec. at (240-270°C) 50 0 0.01 400sec to Peak 0 0.1 Resistance (Ohms) 0 1.0 50 100 150 200 250 300 350 400 450 500 550 Time (sec) Reel Packaging Data 16.0 2.0 5.0±0.2 0.4 4.0 1.75 11.5 16.3 24.0±0.3 15.8 Reel Dimensions Outer Diameter 330 mm Inner Diameter 100 mm Width Quantity 27.4 mm max 500pcs/reel 10.8 Tolerances are ±0.1mm unless otherwise shown Ordering Data Prefix TFP - SMHP35LF - 1R50 - J Style SMHP35LF = 35W, TO-263 style power resistor Resistance Code 4-digit resistance code. Ex: 0R05 = 0.05Ω, 10R0 = 10Ω, 1K00 = 1KΩ Application Notes: 1. Resistance measurement shall be made at the terminal foot. 2. Thermal design should satisfy the following equation: Tab Temperature (TT) + [Thermal Resistance (RqJT) x Power applied (Watts)] ≤ 155°C over the full operating temperature of the application. Absolute Tolerance Code 3. Resistor film temperature is not to exceed 155°C during operation. Standard Packaging 4. This product is RoHS compliant by exemption according to RoHS directive 2002/95/EC exemptions 5 & 7, as they apply to lead in glass and internal solder connections. J = ±5%; F = ±1% RoHS compliant reel (500 pcs per reel) RoHS compliant tube (50 pcs per tube) For additional information or to discuss your specific requirements, please contact our Applications Team using the contact details below. Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com SMHP35 Series Issue June 2009 R2