PBH资料

Precision Resistor Type PBH

Spec Sheet R371-1/2 July 97

Technical Data Resistance range Tolerances Temperature coefficient ( R > 20 mOhm ) Applicable temperature range Load capacity Thermal resistance to aluminum base plate Thermal resistance to ambiente Dielectric withstanding voltage Inductance ( R = 100 mOhm ) Stability ( nominal load at 70 °C )Remarks:

2 mOhm - 100 Ohm 1 %, 5 % < 50 ppm/K ( 20 °C to 60 °C ) -55 °C to +125 °C 3 W / 10 W with heatsink provided Rth < 4 K/W Rth < 20 K/W 500 V AC < 20 nH deviation < 0.5 % after 2,000 h-Standard resistance values according to E12 with the additionel values of 2 and 5-Minimum quantity of other values on request-Tolerance 0.5% for values of 10 mOhm up

The Resistor type PBH, which is very similar to typeTO 247 for high power transistors, features smalldimensions complemented with high load capacity andcompatibility with active components.

The use of the precision resistance material MANGANINas well as optimization of conductor leads and resistancestructure result in a low temperature coefficient, a long-term stability and low inductance.

The resistor is mounted through a center bore to theheatsink, whereby the large area of the base plate willfunction as an optimum heat transfer.The thermal resistancebetween resistor layer and aluminum base plate is ratedbelow 4 K/W, so that the temperature of the resistor foil

P / P Nenn10.750.50.25 will rise only little at a nominal load of 10 W, compared withcustomary resistors. This again results that the absoluteresistance deviation caused by the temperature coefficient,is very low under load and will serve for a good stability onoverloading.

The resistor is ideally suited for applications in powerelectronic and control technique, as most applications atinductive loading will require operation with switched powerregulating units.

Short connection distances and small dimensions withhigh loading capacity and low inductance are a prerequisitefor obtaining high switching frequencies.

∆R/R20 [%]0.2-40-2020406080100120T [oC]-0.2-0.4020406080100120TG / [oC]Temperature dependence of the electrical resistanceof ISA-PLAN Resistors

power derating curve

dR/R [%]25 mΩ10 mΩ1-40-2020-1-24020 mΩ6080100100 mΩ>200 mΩ120T [oC]dimensions( mm )Change of the R(T)-curve to the TCR of copper terminalsfor very low ohmic 2-terminal-resistors

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Spec Sheet R371-2/2July 97

ordering example: PBH - R100 - F1 - 1typePBHresistance value100 mOhmterminalF1tolerance1 %( Technical modifications reserved )

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