FWP227x Series – Riedon™ Foil Power Resistors by Bourns

Temperature Coefficient

4000

2000

0

-2000

-4000

-6000

-8000

-40

-20

0

20

40

60

80

100

120

140

TEMPERATURE (°C)

NOMINAL

Δ R/R

LIMIT 1 (3 σ)

LIMIT 2 (3 σ)

+15 PPM/°C

-15 PPM/°C

Table A

250

200

150

100

50

0

2

5

10

20

50

100

200

RESISTANCE VALUE (mΩ)

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 for a

0.5 % stabile part.

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)

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.

Typical Part Marking

FWP2272P

10R0 1%

MANUFACTURER’S

TRADEMARK

MODEL

NUMBER OF

TERMINALS

POWER

RATING

RESISTANCE CODE:

“R” REPRESENTS

DECIMAL POINT

(EXAMPLES: R005 = 0.005 Ω,

10R0 = 10 Ω)

RESISTANCE

TOLERANCE