Wirewound Resistors, Surface Mount,
Silicone or Cerment Coated, High Power
www.vishay.com For technical questions in Europe, contact: ww1resistors@vishay.com
For technical questions in Americas/Asia, contact: ww2aresistors@vishay.com
Document Number: 30246
312 Revision: 04-Mar-09
WSZ
Vishay Dale
FEATURES
•Low cost, high power (up to 3.75 W)
•All welded construction
•Ideal for pulsing application
•Ceramic core
•Available on tape and reel
•Lead (Pb)-free version is RoHS compliant
Notes
(1) Lower TCR or other power range on request
(2) ≤ 1 Ω ≤ 400 ppm/K
(3) Power rating depends on the maximum temperature at the solder
point, solder pad dimensions, the component placement density
and the substrate material
Notes
(4) See “Part Number and Product Description” (5) See “Packaging Table”
* Pb containing terminations are not RoHS compliant, exemptions may apply
** Please see document “Vishay Green and Halogen-Free Definitions (5-2008)”: www.vishay.com/doc?99902
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
POWER
RATING
P
25 °C (3)
TOLERANCE
RESISTANCE RANGE
(1)
E12 = ± 10 % Tol., E24 = ± 5 % Tol.
DIN 41432
RESISTANCE RANGE
ENCAPSULATION
TCR - 10 ... - 80 ppm/K
(2)
(CLASS 1)
TCR 100 ... 180 ppm/K
(CLASS 3)
TCR
± 50 ppm/°C
TCR
± 30 ppm/°C
WSZ6720 1.8 W
± 1 %
± 2 %
± 15 %
± 10 %
1 Ω to 510 Ω
0.22 Ω to 510 Ω
0.10 Ω to 510 Ω
0.10 Ω to 510 Ω
-
-
24 Ω to 3.3 kΩ
1.8 Ω to 3.3 kΩ
-
-
-
-
-
-
-
-
Cement
WSZ7532 3.75 W ± 1 %, ± 3 %
± 5 %, ± 10 %
-
-
-
-
-
1 Ω to 9.99 Ω
10 Ω to 15 kΩ
10 Ω to 15 kΩSilicone
PART NUMBER AND PRODUCT DESCRIPTION
Part Number: WSZ672011509KBM000
MODEL TCR/MATERIAL VALUE TOLERANCE CODE PACKAGING CODE SPECIAL
WSZ6720 1 =
- 10 ... - 80 ppm/K
WM 50
Class 1
3 =
100 ... 180 ppm/K
WM 110
Class 3
3 digit value
1 digit multiplier
MULTIPLIER
7 = *10-3
8 = *10-2
9 = *10-1
0 = *100
1 = *101
2 = *102
3 = *103
F = ± 1.0 %
G = ± 2.0 %
J = ± 5.0 %
K = ± 10.0 %
BM = Lead (Pb)-free,
tape/reel
LX = Lead (Pb)-free,
bulk
3 digits
000 = Standard
Product Description: WSZ6720 WM 50 15 Ω10 % BM
WSZ6720 WM 50 15 Ω10 % BM
MODEL (4) TCR/MATERIAL (4) VALUE (4) TOLERANCE CODE (4) PACKAGING DESCRIPTION(5)
Part Number: WSZ75321K000JBA1
MODEL VALUE TOLERANCE CODE PACKAGING CODE SPECIAL
WSZ7532 R = Decimal
K = Thousand
54R15 = 54.15
1K325 = 1325
F = ± 1.0 %
G = ± 2.0 %
H = ± 3.0 %
J = ± 5.0 %
K = ± 10 %
EA = Lead (Pb)-free, tape/reel
EK = Lead (Pb)-free, bulk
TA = Tin/lead, tape/reel
BA = Tin/lead, bulk
(Dash number)
(up to 3 digits)
From 1 to 999
as applicable
Product Description: WSZ7532-1 1 kΩ5 % B43
WSZ7532-1 1 kΩ5 % B43
MODEL (4) VALUE (4) TOLERANCE CODE (4) PACKAGING DESCRIPTION(5)
7201 5091Z6 BM 0KS 00W
5321 000KZ7 BAJS 1W
WSZ
Wirewound Resistors, Surface Mount,
Silicone or Cerment Coated, High Power Vishay Dale
Document Number: 30246 For technical questions in Europe, contact: ww1resistors@vishay.com
For technical questions in Americas/Asia, contact: ww2aresistors@vishay.com
www.vishay.com
Revision: 04-Mar-09 313
DIMENSIONS
Note
(1) Embossed Carrier Tape per latest revision of EIA-481-3
D
A
B
I
E C
Z
b
a
PIN PLANE
≤ 0.4
MODEL
DIMENSIONS in millimeters [inches]
Amax. BCmax. Dnom EZ
WSZ6720
13.2
[0.512]
17 ± 0.5
[0.670]
4.8
[0.189]
0.8
[0.031]
5 ± 0.5
[0.20 ± 0.02]
3.6 ± 0.5
[0.142 ± 0.02]
WSZ7532
14.27
[0.562]
19.86
[0.782]
4.78
[0.188]
0.813
[0.032]
8.18
[0.322]
6.5
[0.256]
MODEL
SOLDER PAD DIMENSIONS in millimeters [inches]
ab l
WSZ6720
10 [0.394] 10 [0.394] 14.5 [0.57]
WSZ7532
4.0 [0.157] 9.50 [0.374] 15.05 [0.593]
TECHNICAL SPECIFICATIONS
PARAMETER UNIT WSZ6720 WSZ7532
Operating Temperature Range °C - 55/+ 250 - 65/+ 350
Maximum Working Voltage V (P x R)1/2 (P x R)1/2
Weight (Typical) g 0.6 0.7
Terminal Strength lb 10 minimum 10 minimum
PERFORMANCE
TEST CONDITIONS OF TEST TEST LIMITS
WSZ6720 WSZ7532
Temperature Cycling - 55 °C to + 125 °C, 5 cycles, 15 min at each extreme ± 3 %
Δ
R± (2 % + 0.05
Ω
)
Δ
R
High Temperature Exposure 1000 h at + 250 °C ± 3 %
Δ
R± (2 % + 0.05
Ω
)
Δ
R
Short Time Overload 5 x rated power for 5 s ± 1 %
Δ
R± (2 % + 0.05
Ω
)
Δ
R
Shock, Specified Pulse 100 g’s for 6 ms, 10 shocks ± 1 %
Δ
R± (0.2 % + 0.05
Ω
)
Δ
R
Vibration, High Frequency Frequency varied 10 Hz to 2000 Hz, 20 g peak, 2 directions 6 each ± 1 %
Δ
R± (0.2 % + 0.05
Ω
)
Δ
R
Load Life 2000 h at rated power, + 25 °C, 1.5 h ON, 0.5 h OFF ± 3 %
Δ
R± (3 % + 0.05
Ω
)
Δ
R
Resistance to Soldering Heat + 260 °C solder, 10 - 12 s dwell, 25 mm/s emergence ± 1 %
Δ
R± (0.5 % + 0.05
Ω
)
Δ
R
WSZ6720
Power in W
0
012345
100
200
300
WSZ7532
Temperature Rise in °C
Temperature Rise
Measurement based on recommended solder pads
Derating
- 55 50 150 250 350
Ambient Temperature in °C
0
20
WSZ7532
40
60
80
100
120
WSZ6720
Rated Power in %
PACKAGING
MODEL REEL
TAPE WIDTH DIAMETER PIECES/REEL CODE
WSZ6720 24 mm 330 mm 1250 BM
WSZ7532 (1) 32 mm/Embossed plastic 330 mm/13" 350 EA/TA
Document Number: 91000 www.vishay.com
Revision: 18-Jul-08 1
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Vishay
All product specifications and data are subject to change without notice.
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(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
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otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
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