SMD POWER RESISTORS
Type 3521 Series
Key Features
2 Watts at
70°C
Small size to
power ratio
Supplied on
tape
Value marked
on resistor
Available via
distribution
500 volt
maximum
overload
250 volt
working
voltage
Terminal finish
matte Sn over
Ni
TE Connectivity 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 at 70°C
Max RCWV*
Max overload voltage
Resistance Tolerance
Resistance range
Temperature Coefficient
2W
250V
500V
1%
1R0 - 1M0
<10R ±200PPM
10R – 1M0 ±100PPM
>1M0 ±200PPM
-55°C ~ +155°C
70°C
Temperature range
Ambient temperature
* 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.
9-1773463-5 CIS WR 01/2016
Dimensions in
millimetres unless
otherwise specified
Dimensions Shown for
reference purposes only.
Specifications subject to
change
For Email, phone or live chat,
go to: www.te.com/help
SMD POWER RESISTORS
Power derating curve
For resistors operated in ambient temperatures above 70°C, power rating
must be derated in accordance with this curve.
Dimensions
L ± 0.10
6.35
W ± 0.15
3.20
t ± 0.10
0.55
a ± 0.25
0.60
b ± 0.20
0.50
9-1773463-5 CIS WR 01/2016
Dimensions in
millimetres unless
otherwise specified
Dimensions Shown for
reference purposes only.
Specifications subject to
change
For Email, phone or live chat,
go to: www.te.com/help
SMD POWER RESISTORS
Marking:
Marking for E-96 series in 2512 size: 4 digit marking
First three digits are significant figures of resistance and the fourth
digit represents the number of following zeros
*For ohmic values below 100 Ω, letter"R" is for decimal point.
Recommended PCB layout
A
3.70
B
2.45
C
2.70
4 layers PCB specification:
1) Outside 2 layers (Top and Bottom) with copper foil thickness at 2oz.
2) Inside 2 layers (Middle layers) with copper foil thickness at 4 oz.
How To Order
3521
1K0
F
T
Common Part
Resistance Value
1 ohm 1R0
1K ohm 1000 ohms
1K0
1 Meg ohm
1000000 ohms
1M0
Tolerance Pack Style
3521
F – 1%
T – 4000
reel
9-1773463-5 CIS WR 01/2016
Dimensions in
millimetres unless
otherwise specified
Dimensions Shown for
reference purposes only.
Specifications subject to
change
For Email, phone or live chat,
go to: www.te.com/help
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