Applications

n

Battery management systems

n

Power supplies

n

Power modules

n

Frequency converters

Temperature Coefficient

2000

0

-2000

-4000

-6000

-8000

-10000

-40

-20

0

20

40

60

80

100

120

140

TEMPERATURE (°C)

NOMINAL

Δ R/R

LIMIT 1

LIMIT 2

Power Derating Curve

120

100

80

60

40

20

0

25

50

0.5 %

0.2 %

0.1 %

85

100

115

130

TEMPERATURE OF THE BACKPLATE (°C)

Power Rating Notes

The FWP Series Resistors must be attached to a suitable heat

sink. The maximum internal resistor temperature is 130 °C.

To specify an appropriate heat sink use the following formula:

RθH = TMAX - (P x RθR) - TA

P

Where: RθH = Thermal Resistance of Heat Sink (K/W)

RθR = Thermal Resistance of Resistor (K/W)

TMAX = Maximum Temperature of Resistor

TA = Ambient Temperature of Heat Sink (°C)

P = Power Through Resistor (W)

Performance Characteristics

Test

Conditions

Test Method

Reference

Limit

Load Life

1000 hours, ON/OFF with rated

power at +25 ℃

MIL-STD-202 Method 108

ΔR < ±1 %

High Temperature Exposure

+155 °C for 1000 hours

MIL-STD-202 Method 303

ΔR < ±1 %

Low Temperature Storage

-55 ℃ for 24 hours

MIL-STD-202 Method 303

ΔR < ±0.5 %

Thermal Shock

-55 °C to +155 ℃, 5 cycles

MIL-STD-202 Method 107

ΔR < ±0.5 %

Humidity Resistance

+40 ℃ / 90 % for 240 hours

MIL-STD-202 Method 103

ΔR < ±0.5 %

Resistance to Solder Heat

Solder dipping at 260 ℃ for 10 sec. MIL-STD-202 Method 210

ΔR < ±0.5 %

Short Time Overload

2.5x rated power for 5 sec.

MIL-STD-202 Method 303

ΔR < ±0.5 %

Specifications are subject to change without notice.

Users should verify actual device performance in their specific applications.

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

FWP220/221 Series – Riedon™ Precision Power Foil Shunt Resistors by Bourns