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Vishay Dale

Revision: 26-Jan-2021

2

Document Number: 30394

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

DIMENSIONS in inches (millimeters)

Note

• Thermal resistance (°C/W): < 2.5 °C/W

TECHNICAL SPECIFICATIONS

PARAMETER

UNIT

3939 RESISTOR CHARACTERISTICS

Temperature coefficient (20 °C to 60 °C)

(complete resistor)

ppm/°C

± 75

Temperature coefficient (20 °C to 60 °C)

(only element material)

ppm/°C

± 30

Operating temperature range

°C

-65 to +170

Dielectric withstanding

100

Maximum working voltage

V

Maximum terminal temperature

°C

120

MATERIAL

MIN.

(μm)

MAX.

(μm)

Backside finish

Au

0.05

0.15

Ni

3.1

6.1

Top side termination

Au

0.05

0.15

Ni

3.1

6.1

Cu (reference only)

50

Ni (WFMB only)

< 0.01

0.012 (0.30)

0.030 (0.75)

0.279 (7.09)

0.09

(2.29)

0.122

(3.10)

0.025 (0.64)

0.071 (1.80)

0.071 (1.80)

0.394 (10.01)

0.270 (6.86)

0.025 (0.64)

0.099

(2.52)

0.053

(1.36)

0.270 (6.86)

0.075 (1.90)

0.075 (1.90)

0.075 (1.90)

0.410 (10.41)

0.410 (10.41)

Solder pads

Bond area

Bond connections

0.394 (10.01)