MHP20S TO-126 Series Power Resistor MHP20S Series • • • • • TO-126 housing Low inductance (<50nH) Power dissipation up to 20W High stability film resistance elements RoHS compliant IRC’s TO-126 power film resistors satisfy demanding applications for accurate and stable power resistors housed in the convenient TO-126 case. The resistance element is isolated from the mounting tab by an alumina ceramic layer, providing high thermal conductivity and excellent insulation resistance between terminals and tab. The low inductance design makes these products especially useful in high frequency and high speed pulse applications. Specification Data TypePower Power Rating1 Heatsink2 Free Air3 MHP20SLF 20W 1W MHP20SLF 20W 1W Voltage Rating4 Thermal Resistance 500 5.9°C/W Resistance Range (W) Tolerances Preferred Values Temperature Coefficient 0.01 - 0.09 ±5% E6 ±250ppm/°C 0.1 - 51K ±1%, ±5% E24 ±100ppm/°C Maximum current 25 amps Power rating based on 25°C case temperature Power rating based on 25°C ambient temperature 4 Maximun voltage or √PxR 1 2 3 Physical Data Dimensions (mm) A 8.5 ±0.2 B 12.0 ±0.2 C 3.1 ±0.2 D 3.1 ±0.1 E 17.0 ±1.0 F 3.2 ±0.5 G 3.8 ±0.2 H 1.75 ±0.1 J 0.5 ±0.05 K 0.6 ±0.05 L 1.4 ±0.05 M 5.08 ±0.1 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 MHP20S Series Issue July 2008 MHP20S Series TO-126 Power Resistor Frequency Response Data Pulse Power Data 1000Ω 100Ω 50Ω 10Ω 5Ω Power Derating Data Temperature Rise Data Environmental Data Item Test Conditions Specification - Performance 1000Ω Operating Temperature Range Dielectric Withstanding Voltage Load Life 100Ω 50Ω 10Ω Moisture Resistance -55°C to 155°C 60 seconds, between leads connected together and metal back plate 2000VDC 25°C, 90 min. ON, 30 min. OFF, 1000 hours ∆R ±1.0% + 0.05W 40°C, 90-95% RH, DC 0.1W, 1000 hours ∆R ±1.0% + 0.05W 230 ± 5°C, 3 sec. >75% coverage Between leads and metal back plate > 1000MW IEC60068-2-6 ∆R ±0.25% 5Ω Solderability* Insulation Resistance Vibration * During soldering, the soldering temperature profile must not cause the metal back plate of this device to exceed 220°C Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com MHP20S Series Issue July 2008 MHP20S Series TO-126 Power Resistor Ordering Data Prefix TFP - MHP20SLF - 1R50 - J Style Resistance Code 4-digit resistance code. Ex: 10R0 = 10Ω, 1K00 = 1KΩ Tolerance Code J = ±5%; F = ±1% Packaging Standard packaging is RoHS PS/PE tube packaging (60 pieces per tube). Application Notes: 1. Insulating material is unnecesaary between the heat sink and the tab as the resistor film is insulated by the internal alumina substrate. 2. When mounting with a fastner, thermal grease is recommended. 3. Thermal design should satisfy the following equation: Case Temperature (Tc) + [Thermal Resistance (R0JC) x Power applied (Watts)] ≤ 155°C over the full operating temperature range of the application. 4. Leads are lead free. Internal connections contain Pb that are exempted under RoHS directive 2002/95/EC, exemption 7. Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com MHP20S Series Issue July 2008