VISHAY VCS331Z

Power Current Sense Resistors
Vishay Foil Resistors
Z-Based Bulk Metal® Foil Technology
Rapid ΔR Stabilization - Low WCR - Low TCR
VHP4Z
VFP4Z
VCS331Z
VCS332Z
VPR247Z
Product may not be to scale
Rapid ΔR stabilization under transient loads, low wattage
coefficient (WCR), and low temperature coefficient (TCR)
are features of this new Z Based Bulk Metal® Foil series of
Current Sense Resistors.
The series should be selected where rapid .R stabilization
and resistance stability under transient power conditions is
required. These products achieve optimum performance
when mounted on a chassis or cooled heat sink. The Z
Based Technology provides extremely low WCR under
defined conditions (see Figure 1 and Figure 2). The low
absolute TCR provided by the Z Based Technology is
measured over the temperature range of - 55 °C to + 125 °C,
+ 25 °C reference (see Figure 3).
All of these devices utilizing the Z Based Technology are
provided with a true 4 terminal Kelvin connection. This is a
must for current sensing when the R-value is less than
100 Ω. The VHP4Z and VPR247Z types add the additional
benefit of hermeticity. The welded construction and nitrogen
backfill provide maximum protection against environmental
stresses and insures long term stability. Typical applications
for this new series includes electron beam circuitry, electron
microscopes, fire control radar display systems, high speed
video display, deflection amplifier circuits, constant current
power supplies and forced balance electronic scales.
Custom high power designs can be developed for your
specific applications.
FEATURES
• Rapid ΔR Stabilization under transient loads (see Figure 1)
• Tenfold improvement of Wattage Coefficient of Resistance
(WCR): 4 ppm/W (see Figure 2)
• Low Temperature Coefficient of Resistance:
(see Figure 3 and Table 2)
• Thermal Resistance: 6 °C/W
• Power Rating: 10 watts on heat sink1) at + 25 °C
(see Table 2)
3 watts in free air at + 25 °C (see Table 2)
• Load Life Stability:
± 0.05 % Max ΔR, 10 W on heat sink at + 25 °C, 2000 hours
± 0.01 % Max ΔR, 3 W on heat sink at + 25 °C, 2000 hours
± 0.05 % Max ΔR, 3 W in free air at + 25 °C, 2000 hours
• Current Noise: < 0.01 µV(RMS)/volt of applied voltage
• Thermal EMF: 0.1 µV/°C maximum, 0.05 µV/°C typical
• Non-Inductive design
NOTE:
1.Heatsink - Aluminum (6" L x 4" W x 2" H x 0.04" THK)
SALES
• ASIA/JAPAN: [email protected]
• UK/HOLLAND/SCANDINAVIA: [email protected]
• AMERICAS: [email protected]
• GERMANY/CZECH REPUBLIC/AUSTRIA: [email protected] • FRANCE/SWITZERLAND/SOUTHERN EUROPE: [email protected] • ISRAEL: [email protected]
www.vishay.com
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For technical questions, contact: [email protected]
Document Number: 63086
Revision: 02-Mar-05
Power Current Sense Resistors
Z-Based Bulk Metal® Foil Technology
Vishay Foil Resistors
Rapid ΔR Stabilization - Low WCR - Low TCR
FIGURE 2 - POWER COEFFICIENT (WCR)
15
RESISTANCE DEVIATION, ppm
RESISTANCE DEVIATION, ppm
FIGURE 1 - RAPID STABILIZATION
10
5
0
-5
- 10
- 15
0
20
40
60
80
100
120
140
60
40
20
0
- 20
- 40
- 60
160 180 200
0
1
2
TIME IN SECONDS
RESISTANCE CHANGE UNDER LOAD AT 10 WATTS
MOUNTED ON COOLED HEAT SINK HELD AT + 25 °C
pp
100
50
+ 200
C
/°
C
m
/°
ppm
m/
p
+ 82
°C
0
- 50
- 100
- 150
+2
- 200
- 250
- 55
p
/
pm
-2
°C
10
pp
FIGURE 4 - POWER DERATING CURVE
- 55 °C
PERCENT OF
RATED POWER
RESISTANCE CHANGE, ppm
-2
150
8
RESISTANCE CHANGE VS APPLIED POWER
MOUNTED ON COOLED HEAT SINK HELD AT + 25 °C
FIGURE 3 - TEMPERATURE COEFFICIENT
RESISTANCE
250
200
5
APPLIED POWER IN WATTS
+ 25 °C
+ 100
+ 75
+ 50
+ 25
0
m/
°C
- 200
- 50
0
+ 50
+ 100
+ 150
+ 200
AMBIENT TEMPERATURE
+ 25
+ 125
AMBIENT TEMPERATURE (°C)
NO LOAD APPLIED
FIGURE 5 - KELVIN CONNECTION
R
r1
I1
r2
I2
E2
E1
r4
r3
Im
0
8
r5
Kelvin, 4-terminal, connections are utilized for these low
ohmic value products to measure a precise voltage drop
across the resistive element. In these applications the
contact resistance, lead resistance, and their TCR effect may
be greater than that of the element itself and could cause
significant errors if the standard 2-terminal connection is
used. Figure 5 shows a high impedance measurement
system where r5 approaches infinity and Im approaches zero
resulting in negligible IR drop through r3 and r4 which
negates their lead resistance and TCR effect. With the
voltage sense leads E1 and E2 inside of r1 and r2 the
resistance and TCR effect of the current leads, I1 and I2 are
negated and only the resistance and TCR of the element R
are sensed. This method of measurement is essential for
precise current sensing.
SALES
• ASIA/JAPAN: [email protected]
• UK/HOLLAND/SCANDINAVIA: [email protected]
• AMERICAS: [email protected]
• GERMANY/CZECH REPUBLIC/AUSTRIA: [email protected] • FRANCE/SWITZERLAND/SOUTHERN EUROPE: [email protected] • ISRAEL: [email protected]
Document Number: 63086
Revision: 02-Mar-05
For technical questions, contact: [email protected]
www.vishay.com
2
Power Current Sense Resistors
Vishay Foil Resistors
Z-Based Bulk Metal® Foil Technology
Rapid ΔR Stabilization - Low WCR - Low TCR
VHP4Z
0.770 (19.56)
max dia
Mounting
Hole
0.222
(5.64)
E1
E2
Standard Marking
Arrangement
VISHAY
Model No.
VHP-3Z
Res. Val.
21K500
Res. Tol.
± 0.01 %
Date Code
9802
Ex: 98 02
Year Week
0.45 (11.43)
min.
I2
TO-3 cap
TO-3 base
0.665 (16.89)
± 0.005 (± 0.13)
1.186 (30.13)
± 0.005 (± 0.13)
1.530 (38.86)
± 0.005 (± 0.13)
I1
0.266 (6.76)
± 0.005 (± 0.13)
0.335 (8.51)
± 0.005 (± 0.13)
FIGURE 6 - STANDARD IMPRINTING AND DIMENSIONS
0.040 (1.00) dia
± 0.005 (± 0.13)
0.43 (10.92)
± 0.01 (± 0.25)
1.00 (25.4)
± 0.005 (± 0.13)
0.156 dia (3.9)
± 0.005 (± 0.13)
VPR247Z
I1
I2
E1
E2
VFP4Z
+ 0.004
0.040 ± 0.005 (1.02 ± 0.13)
0.690 ± 0.005
(17.53 ± 0.13)
0.120 ± 0.005
(3.05 ± 0.13)
0.125 ± 0.005
(5.46 ± 0.13)
0.140 ± 0.005
(3.56 ± 0.13)
+ 0.1
0.276 - 0.008 (7.0 - 0.2 )
1.575 ± 0.016 (40 ± 0.4)
0.118 (3)
0.197 (5)
1.181 ± 0.016 (30 ± 0.4)
(Dia. Thru Hole)
0.820 ± 0.005
(20.83 ± 0.13)
0.010 (0.254) max
Sleeve Extension
VISHAY
VPR247Z
XXXX
0R2000 1 %
Tolerance
Resistance
Value
I E E I
0.200 ± 0.005 1 1 2 2
(5.08 ± 0.13)
S
0.100 ± 0.005
(2.54 ± 0.13)
LS
Gold Plated
Copper Leads
0.025 Dia (0.633)
0.120 ± 0.005
(3.05 ± 0.13)
0.787 ± 0.016
(20 ± 0.4)
0.394 ± 0.008
(10 ± 0.2)
0.500 Min
(12.70)
Lead Dia.
0.025 (0.633)
Solder Coated
Copper
I1 E1 E2
1.00 Min.
(25.4 Min.)
I2
0.200 [x3] (5.08)
VCS332Z
0.040 (1.0)
NOMINAL
0.040 (1.0)
NOMINAL
1.340 ± 0.008 (34.0 ± 0.2)
0.689 ± 0.020 (17.5 ± 0.5)
1.083 ± 0.20 (27.5 ± 0.5)
0.138 (3.5)
NOMINAL
0.701 ± 0.008
(17.8 ± 0.2)
1.024 (26.0)
MAXIMUM
VISHAY
VCS331Z
0R2000 1 %
B9825
0.16 (0.4)
NOMINAL
1.340 ± 0.008 (34.0 ± 0.2)
0.087 (2.2)
MAXIMUM
0.210 (5.33)
MAXIMUM
0.701 ± 0.008
(17.8 ± 0.2)
VISHAY
VCS332Z
8R2000 0.1 %
B9825
0.040 (1.0)
NOMINAL
0.216 (5.5)
MINIMUM
0.197 ± 0.008
(5.0 ± 0.2)
0.138 (3.5)
NOMINAL
0.087 (2.2)
MAXIMUM
0.210 (5.33)
MAXIMUM
0.197 ± 0.008
(5.0 ± 0.2)
0.032 (0.8)
NOMINAL
0.689 ± 0.020 (17.5 ± 0.5)
1.083 ± 0.20 (27.5 ± 0.5)
1.00 (25.4)
MINIMUM
VCS331Z
1.063 (27.0)
MAXIMUM
0.150 ± 0.004
(3.8 ± 0.1)
VISHAY
VFP-4Z
(Value)
(Tol.)
(Date Code)
Date Code
10
01
Year Week
SALES
• ASIA/JAPAN: [email protected]
• UK/HOLLAND/SCANDINAVIA: [email protected]
• AMERICAS: [email protected]
• GERMANY/CZECH REPUBLIC/AUSTRIA: [email protected] • FRANCE/SWITZERLAND/SOUTHERN EUROPE: [email protected] • ISRAEL: [email protected]
www.vishay.com
3
For technical questions, contact: [email protected]
Document Number: 63086
Revision: 02-Mar-05
Power Current Sense Resistors
Z-Based Bulk Metal® Foil Technology
Vishay Foil Resistors
Rapid ΔR Stabilization - Low WCR - Low TCR
TABLE 1 - RESISTANCE VALUE VS TOLERANCE
RESISTANCE RANGE (Ω)
STANDARD TOLERANCE (%)
10 to 500
± 0.01 %
5 to < 10
± 0.02 %
2 to < 5
± 0.05 %
1 to < 2
± 0.10 %
0.5 to < 1
± 0.25 %
0.25 to < 0.5
± 0.50 %
TABLE 2 - SPECIFICATIONS
TEST OR CONDITION
PERFORMANCE
4 ppm/Watt Maximum1)
Wattage Coefficient of Resistance (WCR)
≥ 1.0 Ω to 500 Ω, ± 2 ppm/°C Maximum
0R25 to < 1.0 Ω, ± 3 ppm/°C Maximum
Temperature Coefficient of Resistance (TCR)
(- 55 °C to + 125 °C, + 25 °C Reference)
6 °C/Watt1)
Thermal Resistance
Maximum Ambient Temperature
Rated Power
Zero Power
Power Rating
at + 25 °C
+ 25 °C
+ 150 °C
VHP4Z
VPR247Z
VFP4Z
10 Watts or 3 Amps Maximum (Heat Sink)2), 3)
3 Watts or 3 Amps Maximum (Free Air)3)
VCS331Z
VCS332Z
10 Watts or 5 Amps Maximum (Heat Sink)2),3)
3 Watts or 5 Amps Maximum (Free Air)3)
± 0.05 % Max ΔR, 10 W on heat sink at + 25 °C, 2000 hours
± 0.01 % Max ΔR, 3 W on heat sink at + 25 °C, 2000 hours
± 0.05 % Max ΔR, 3 W in free air at + 25 °C, 2000 hours
Load Life Stability
Inductance
0.1 µH Maximum; 0.08 µH Typical
Voltage Coefficient
< 0.1 ppm/V
Current Noise
< 0.010 µV(RMS)/Volt of applied voltage (- 40 dB)
NOTES:
1. Mounted on a cooled heat sink held at + 25°C
2. Heatsink - Aluminum (6" L x 4" W x 2" H x 0.04" THK)
3. Whichever is lower
TABLE 3 - ORDERING INFORMATION
Please specify Vishay VHP4Z, VPR247Z, VFP4Z, VCS331Z, VCS332Z series resistors as follows:
MODEL NO.
VHP4Z
RESISTANCE VALUE
RESISTANCE
RANGE
0.25 to < 500 Ω
TOLERANCE
LETTER
DESIGNATOR
MULTIPLIER
FACTOR
R
x1
0.01 %
Example: 100R01 = 100.01 Ω
Resistance Value, in Ω, is expressed by a series of 6 characters, 5 of which represent significant digits while the 6th is a dual purpose letter
that designates both the multiplier and the location of the comma or decimal.
SALES
• ASIA/JAPAN: [email protected]
• UK/HOLLAND/SCANDINAVIA: [email protected]
• AMERICAS: [email protected]
• GERMANY/CZECH REPUBLIC/AUSTRIA: [email protected] • FRANCE/SWITZERLAND/SOUTHERN EUROPE: [email protected] • ISRAEL: [email protected]
Document Number: 63086
Revision: 02-Mar-05
For technical questions, contact: [email protected]
www.vishay.com
4
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Vishay
Disclaimer
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(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
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
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
document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
www.vishay.com
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