Series M2470 pages

Resistors
M247 - series

Power Resistor

Power Rating up to 140 Watt (with Heat-Sink)
Any Resistance from 0,05Ω - 51kΩ
Standard Tolerance ±1%
Standard TCR to 50ppm
Low Inductance
Induktionsarm

Specification
Resistance Range

M247
0,05Ω - 51kΩ

0,05Ω - 51kΩ

100W

140W

Power (1 Watt without Heat-Sink)
Thermal Resistance

0,9 K/W

1,3 K/W

Standard Tolerance (other on request)

1% bei R ≤ 0,1Ω / 5%
±50ppm/K (R ≥ 10Ω)
±100ppm/K (0,1Ω ≥ R < 10Ω)
±250ppm/K (R < 0,1Ω)

Temperature Coefficient
Operating Temperature Range

-55 °C - 155 °C

Operating Voltage (max.)

500 V

Withstanding Voltage

2000 VAC

Insulation Resistance

≥ 1GOhm

Inductance

8,22 nH (at Stand Off)
Power Derating Curve

Housing
Resistance Element
Substrate
Leads
Back Plate

Parameter

Epoxy - Moulded
NiCr or RuO
Alumina
Copper, Tin Plated

Power (in % of the
Nominal Value)

100

Mechanical Data

80
60
40

+155°C

20
0

Copper, Ni Plated

0

50
100
150
Temperature of the Back Plate

Test

∆R

Load Life

90 min ON, 30 min OFF, 1000h at 25°C

±1%

Humidity

90 - 95% RH, 0,1W, 1000h at 40°C

±1%

Temperature Cycle

-55°C 30 min, +155°C 30min. 1000h

±0,25%

Vibration

IEC60068-2-6

±0,25%

Soldering Heat Resistance

350°C ±5°C, 3 Seconds

±0,1%

Solderability

230°C ±5°C 3 Seconds

>95% Covered

MEGATRON Elektronik GmbH & Co. KG ▪ Hermann-Oberth-Strasse 7 ▪ 85640 Putzbrunn / Munich
Tel.: +49 89 46094-0 ▪ Fax: +49 89 46094-201 ▪ www.megatron.de ▪ info@megatron.de

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3 / 2014
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