SMD Power Resistors
Type 3520 Series
Literature No. 1773139
Issued: 09-06
Dimensions are shown for
reference purposes only.
Dimensions are in millimetres
unless otherwise specified.
Specifications subject to
change.
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Key Features
■1 Watt at 70°C
■Small Size to Power Ratio
■Supplied on Tape
■Available via Distribution
■Value Marked on Resistor
■400 Volt Maximum Overload
■200 Volt Working Voltage
■Laboratory Kit Available
■Low Profile
Type 3520 Series
Tyco Electronics is pleased to
introduce this low cost high power
device, suitable for auto placement in
volume, and for most applications,
including high frequency operations,
owing to the short lead structure. It is
attractively priced and available on
7" reels of 4000 pieces.
Characteristics -
Electrical
Power Rating: 1 Watt at 70°C**
Max. RCWV*: 200V
Max. Overload Voltage: 400V
Resistance Tolerance(%): ±5%
Resistance Range: 1R0 - 1M0
Temperature Coefficient: ±200ppm
±350ppm**(below 10R)
Resistance Grid Value: E-24
* Rated continuous working voltage (RCWV) shall be determined from
RCWV = Rated Power x Resistance Value, or Maximum RCWV listed above, whichever is less
** Recommended Circuit Board Design - If this device is anticipated to run at full continuous power then action to
improve the cooling should be taken. This can be a metal substrate, copper pad left under the chip, an opening in
the PCB or enlarged silver conductor pads each end.
Power Derating Curve
Dimensions
-55 -40 -20 0 20 40 60 70 80 100 120 125
100
80
60
40
20
0
Rated Power (%)
Ambient Temperature (°C)
For resistors operated in ambient temperatures above 70°C, power rating must be derated in accordance with this curve.
LWa b t
6.40 3.20 0.70 0.70 0.60
±0.20 ±0.20 ±0.10 ±0.20 ±0.10
How to Order
3520 1K0 J T
Common Part
1 ohm
1000 milli ohms
1R0
1K ohm
1000 ohms
1K0
1 Meg ohm
1000000 ohms
1M0
Resistance Value
J - 5%
Tolerance Pack Style
3520 T - 4000 / reel
Handling Recommendations
When flow soldering - the land width must be smaller than the Chip Resistor width to properly control the solder
application. Generally, the land width can be Chip Resistor width (W) x 0.7 to 0.8. When reflow soldering - solder
application amount can be adjusted. Thus the land width can be set to W x 1.0 to 1.3.
L
a
W
t
b
