The above table summarizes the more common combinations of power rating, case size and ambient operating temperature that prevail in
various Industrial and Military resistor specifications. The “performance” table in ensuing pages qualifies the load life stability under these combinations.
GLOBAL PART NUMBER INFORMATION
New Global Part Numbering: CMF55301R00FKRE (preferred part numbering format)
C
GLOBAL MODEL
(see Standard
Electrical
Specifications
table)
M
F
5
5
3
0
1
R
0
0
F
K
R
E
PACKAGING
SPECIAL
Blank = Standard
(Dash Number)
(up to 3 digits)
From
1-999
as applicable
RESISTANCE VALUE
R
= Decimal
K
= Thousand
M
= Million
R10000
= 0.1Ω
680K00
= 680KΩ
1M0000
= 1.0MΩ
TOLERANCE
CODE
B
=
±
0.1%
C
=
±
0.25%
D
=
±
0.5%
F
=
±
1%
G
=
±
2%
J
=
±
5%
TEMPERATURE
COEFFICIENT**
E
= 25ppm
H
= 50ppm
K
= 100ppm
L
= 150ppm
N
= 200ppm
EK
= Lead Free, Bulk
EA
= Lead Free, T/R (Full)
EB
= Lead Free, T/R (1000 pcs)
BF
= Tin/Lead, Bulk
RE
= Tin/Lead, T/R (Full)
R6
= Tin/Lead, T/R (1000 pcs)
Historical Part Number example: CMF-553010FT-1 (will continue to be accepted)
CMF-55
HISTORICAL MODEL
3010
RESISTANCE VALUE
F
TOLERANCE CODE
T-1
TEMP. COEFFICIENT
R36
PACKAGING
* Pb containing terminations are not RoHS compliant, exemptions may apply.
** Tolerances of
±
0.5% (D),
±
0.25% (C) and
±
0.1% (B) are available only in 50ppm and 25ppm temperature coefficients.
www.vishay.com
18
For Technical Questions, contact: ff2bresistors@vishay.com
Document Number: 31018
Revision 10-Oct-05
CMF Industrial
Metal Film Resistors, Industrial
DIMENSIONS
in inches [millimeters]
1.500
±
0.125
[38.10
±
3.18]
Vishay Dale
A
C
(Max.)
* 1.08
±
0.125 [27.43
±
3.18] IF TAPE AND REEL
B
D
GLOBAL
MODEL
CMF50
CMF55
CMF60
CMF65
CMF70
CMF07
CMF20
A
0.150
±
0.020
[3.81
±
0.51]
0.240
±
0.020***
[6.10
±
0.51]
0.344
±
0.031
[8.74
±
0.79]
0.562
±
0.031
[14.27
±
0.79]
0.562
±
0.031
[14.27
±
0.79]
0.240
±
0.020
[6.10
±
0.51]
0.375
±
0.040
[9.53
±
1.02]
B
0.065
±
0.015
[1.65
±
0.38]
0.090
±
0.008
[2.29
±
0.20]
0.145
±
0.015
[3.68
±
0.38]
0.180
±
0.015
[4.57
±
0.38]
0.180
±
0.015
[4.57
±
0.38]
0.090
±
0.008
[2.29
±
0.20]
0.145
±
0.015
[3.68
±
0.38]
C
(Max.)
0.187 [4.75]
0.278 [7.06]**
0.425 [10.80]
0.687 [17.45]
0.687 [17.45]
0.278 [7.06]
0.425 [10.80]
D
0.016
±
0.002
[0.41
±
0.05]
0.025
±
0.002
[0.64
±
0.05]
0.025
±
0.002*
[0.64
±
0.05]
0.025
±
0.002
[0.64
±
0.05]
0.032
±
0.002
[0.81
±0.05]
0.025
±
0.002
[0.64
±
0.05]
0.032
±
0.002
[0.81
±
0.05]
* Available with 0.032" [.813mm] lead.
** 0.290" [7.37mm] for
±
0.25% and
±
0.1% resistance tolerances and values > 1MΩ
*** 0.260"
±
0.020" [6.60mm
±
0.508mm] for values > 5 MΩ.
TECHNICAL SPECIFICATIONS
PARAMETER
Maximum Working Voltage
Insulation Voltage (1min)
Voltage Coefficient
Dielectric Strength
Insulation Resistance
Operating Temperature Range
Terminal Strength (pull test)
Noise
UNIT
V
V
eff
Max
VAC
Ω
°C
lb
dB
2
2
5
450
CMF50
≤
200
CMF55
≤
250
CMF07
≤
250
CMF60
≤
500
>500
.± 5ppm/Volt (measured between 10% and full rated voltage)
450
450
750
≥10
11
- 55 / + 175
2
5
2
5
750
900
900
CMF20
≤
500
CMF65
≤
500
CMF70
≤
500
0.10 microvolts/Volt over a decade of frequency, with low and intermediate resistance
values typically below 0.5 microvolts/V
Weight (max)
g
0.12
0.20
0.20
0.50
0.60
1.00
1.10
TEMPERATURE COEFFICIENT CODES
GLOBAL TC CODE
E
H
K
L
N
HISTORICAL TC CODE
T-9
T-2
T-1
T-0
T-00
TEMPERATURE COEFFICIENT
25 ppm/°C
50 ppm/°C
100 ppm/°C
150 ppm/°C
200 ppm/°C
Document Number: 31018
Revision 10-Oct-05
For Technical Questions, contact: ff2bresistors@vishay.com
www.vishay.com
19
CMF Industrial
Vishay Dale
Metal Film Resistors, Industrial
The increase in resistor surface temperature due to the rated load
is shown below.
Resistor surface temperature = heat rise plus ambient
temperature.
100
100
80
60
40
20
20
0
0
-55 -50 -25
0
25
50 70 75 100 125 150 165 175 200
AMBIENT TEMPERATURE IN
˚C
CMF resistors have an operating temperature range of - 55°C to
+ 175°C. They must be derated at high ambient temperatures
according to the derating curve.
RATED POWER IN %
120
HEAT RISE (
°
C)
80
60
40
1/2 W
1W
1W
3/4 W
3/4 W
1/2 W
1/4 W
1/8 W
1/10 W
1/4 W
1/8 W 1/4 W
1/2 W
CMF55 CMF60 CMF65
CMF07 CMF20 CMF70
DERATING
HEAT RISE
MATERIAL SPECIFICATIONS
Element:
Vacuum-deposited nickel-chrome alloy
Coating:
Flame retardant epoxy, formulated for superior
moisture protection
Continuous satisfactory coverage when tested in
accordance with MIL-R-10509
Core:
Fire-cleaned high purity ceramic
Solderability:
SPECIAL MODIFICATIONS
1. Terminals may be supplied in any commercial material with
several type finishes.
MARKING
— Value
2. Special pre-conditioning (power aging, temperature cycling, etc.)
to customer specifications.
3. Non-helixed resistors can be supplied for critical high frequency
applications.
4. Fusible, flameproof versions available.
— Decade and Tolerance
— Date code
(Alternate parts may be MIL marked)
www.vishay.com
20
For Technical Questions, contact: ff2bresistors@vishay.com
Document Number: 31018
Revision 10-Oct-05
CMF Industrial
Metal Film Resistors, Industrial
PERFORMANCE
POWER RATING
MODEL
CMF50
CMF55
CMF60
CMF65
CMF70
CMF07
CMF20
TEST [Test methods - MIL-STD-202]
Short Time Overload
Low Temperature Operation
Moisture Resistance
Shock
Vibration
Temperature Cycling
Load Life
Dielectric Withstanding Voltage
Effect of Solder
–
–
–
–
–
–
±
0.15%
–
–
±
0.05%
±
0.05%
±
0.05%
±
0.01%
±
0.004%
±
0.15%
±
0.5%
±
0.01%
±
0.03%
1/10 Watt
1/8 Watt
1/4 Watt
1/2 Watt
1/2 Watt
–
–
@ + 70
°
C
1/8 Watt
1/4 Watt
1/2 Watt
3/4 Watt
3/4 Watt
1/4 Watt
1/2 Watt
1/4 Watt
1/2 Watt
3/4 Watt & 1 Watt
1 Watt
1 Watt
–
1 Watt
1/20 Watt
1/10 Watt
1/8 Watt
1/4 Watt
1/4 Watt
–
–
@ + 125
°
C
1/10 Watt
1/8 Watt
1/4 Watt
1/2 Watt
1/2 Watt
–
–
1/8 Watt
1/4 Watt
1/2 Watt
3/4 Watt
3/4 Watt
–
–
Vishay Dale
MAXIMUM
∆
R (Typical Test Lots)
–
–
–
–
–
–
±
1.0%
–
–
–
–
–
–
–
–
±
0.15%
–
–
±0.05%
±0.05%
±0.05%
±0.01%
±0.04%
±0.15%
±0.5%
±0.01%
±0.03%
–
–
–
–
–
–
±
1.0%
–
–
Document Number: 31018
Revision 10-Oct-05
For Technical Questions, contact: ff2bresistors@vishay.com
www.vishay.com
21
Legal Disclaimer Notice
Vishay
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
编译自semiengineering 业界越来越关注人工智能的功耗问题，但这个问题并没有简单的解决方案。这需要深入了解应用、半导体和系统层面的软件和硬件架构，以及所有这些的设计和实现方式。每个环节都会影响总功耗和提供的效用。这是最终必须做出的权衡。 但首先，必须解决效用问题。电力是否被浪费了？“我们将电力用于有价值的用途，”Ansys（现为新思科技旗下公司）产品营销总监 Marc Swi...[详细]
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