VRM Datasheet, PDF (1/3 Pages) Vishay Siliconix – Bulk Metal® Foil Technology Industrial Miniature Precision Resistor with TCR of ± 4 ppm/°C and Tolerance to ± 0.01 %

VRM
Vishay Foil Resistors
Bulk Metal^® Foil Technology Industrial Miniature Precision
Resistor with TCR of ± 4 ppm/°C and Tolerance to ± 0.01 %
Any value at any tolerance available with resistance range
The VRM style is a miniaturized version of the now famous
S102C. It is made with a Bulk Metal^® Foil element so it
retains all of the inherent performance of foil resistors. It does
not, however, have the value range, power rating, TCR or
lead spacing of the S102C. It is a size for size replacement
for certain wirewounds and finds application in situations
where size constraints dictate the use of this miniature
precision resistor.
Our Application Engineering Department is available to
advise and to make recommendations. For non-standard
technical requirements and special applications, please
contact us.
FIGURE 1 - IMPRINTING AND DIMENSIONS
FEATURES
• Temperature Coefficient of Resistance:
± 4 ppm/°C (0 °C to + 60 °C);
± 8 ppm/°C (- 55 °C to + 125 °C, 25 °C Ref.)
• Resistance Range: 5 Ω to 50 kΩ
Pb-free
Available
RoHS*
COMPLIANT
• Tolerance: to ± 0.01 %
• Power Rating: 0.25 W at + 70 °C; 0.125 W at + 125 °C
• Load Life Stability: ± 0.05 % Maximum ΔR at + 70 °C at
Rated Power for 2000 hours
• Non Inductive: < 0.08 µH
• Thermal EMF: < 0.1 µV/°C
• Long Term Stability: ± 0.0025 % (25 ppm) per year under
low power and room temperature conditions
• Voltage Coefficient: < 0.1 ppm/V
• Maximum Working Voltage: 250 V
• Terminal Finishes Available: Lead (Pb)-free
Tin/Lead Alloy
• Any value available within resistance range (e.g. 1K234)
• Prototype samples available from 48 hours. For more
information, please contact [e-mail]
• For better performances, please see S-Series datasheet
FIGURE 2 - POWER DERATING CURVE
Front View
Date Code
07 10
Year Week
L
Rear View
Resistance
W
Value Code
Model
ST
VISHAY
XXXX
VRM
LS
H
100R01
0.01 % Tolerance
LL
Lead Material
#22 AWG (0.025 Dia)
Solder Coated Copper
DIMENSIONS
L:
H:
W:
ST:
LL:
LS:
INCHES
0.250 ± 0.010
0.250 ± 0.010
0.125 ± 0.010
0.020 ± 0.010
0.750 Minimum
0.125 ± 0.005
mm
6.35 ± 0.25
6.35 ± 0.25
3.18 ± 0.25
0.51 ± 0.25
19.05 Minimum
3.18 ± 0.13
+ 100
+ 70 °C
+ 155 °C
+ 75
+ 50
+ 25
0
- 55 - 25
0 + 25 + 50 + 75 + 100 + 125 + 150 + 175
Ambient Temperature (°C)
TABLE 1 - RESISTANCE VALUES VS
TOLERANCE
5 Ω to 50 Ω
50 Ω to 50 kΩ
± 0.1 %
± 0.25 %
± 0.5 %
± 1.0 %
± 0.01 %
± 0.02 %
± 0.05 %
± 0.1 %
± 0.25 %
± 0.5 %
± 1.0 %
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63010
Revision: 12-Jul-07
For any questions, contact: [e-mail]
www.vishay.com
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