CMA 0204 HF
Vishay Beyschlag
Pulse Load MELF Resistors for High Frequency Applications
FEATURES
•
Speciality product for RF applications
•
Low-inductance non-helical trimmed product
•
Special carbon film technology
•
ESD capability: 3 kV, Human Body Model
•
Suitable for more than 10 GHz
•
Compatible with lead (Pb)-free and lead containing
soldering processes
•
Lead (Pb)-free and RoHS compliant
CMA 0204 HF speciality MELF resistors combine the
advanced pulse load capability and the suitability for RF
applications in a single component. They are the perfect
choice in high frequency circuit designs where the parasitic
inductance of regular, helical trimmed resistors can not be
accepted, but where also pulse energies apply. Typical
applications are in the fields of telecommunication
equipment and industrial electronics.
APPLICATIONS
•
Telecommunication equipment
•
Industrial electronics
METRIC SIZE
DIN:
CECC:
0204
RC 3715M
TECHNICAL SPECIFICATION
DESCRIPTION
CECC size
Resistance range
Resistance tolerance
Temperature coefficient
Operation mode
Climatic category (LCT/UCT/days)
Rated dissipation
P
701)
Operating voltage,
U
max
AC/DC
Film temperature
Max. resistance change at
P
70
for resistance range,
|ΔR/R| after:
1000 h
8000 h
225 000 h
Permissible voltage against ambient (insulation):
1 minute;
U
ins
continuous
Failure rate
300 V
75 V
≤
1
×
10
-9
/h
≤
1%
≤
2%
t.b.f.
125
°C
47
Ω
to 300
Ω
≤
2%
≤
4%
-
standard
55/125/56
0.25 W
Limited by
P
70
155
°C
CMA 0204 HF
RC 3715M
50
Ω;
47
Ω
to 300
Ω
±2%
approx. - 250 ppm/K
power
55/155/56
0.4 W
Note:
These resistors do not feature a limited lifetime when operated within the permissible limits. However, resistance value drift increasing over
operating time may result in exceeding a limit acceptable to the specific application, thereby establishing a functional lifetime.
1)
The power dissipation on the resistor generates a temperature rise against the local ambient, depending on the heatflow support of the
printed-circuit board (thermal resistance). The rated dissipation applies only if the permitted film temperature is not exceeded. Furthermore, a
high level of ambient temperature or of power dissipation may raise the temperature of the solder joint, hence special solder alloys or board
materials may be required to maintain the reliability of the assembly.
For technical questions contact: ff3bresistors@vishay.com
Document Number: 28759
Revision: 18-Jul-06
www.vishay.com
58
CMA 0204 HF
Pulse Load MELF Resistors for High
Frequency Applications
12NC INFORMATION
•
The 12-digit numeric code starts with 2312
•
The subsequent 4 digits indicate the resistor type,
specification and packaging; see the 12NC table
•
The remaining 4 digits indicate the resistance value:
– The first 3 digits indicate the resistance value.
– The last digit indicates the resistance decade in
accordance with the 12NC Indicating Resistance
Decade table.
Vishay Beyschlag
Last Digit of 12NC Indicating Resistance Decade
RESISTANCE DECADE
10
Ω
to 99.9
Ω
100
Ω
to 999
Ω
LAST DIGIT
9
1
12NC Example
The 12NC of a CMA 0204 HF resistor, value 50
Ω
with ± 1 %
tolerance, supplied in blister tape of 3000 units per reel is:
2312 158 25009.
12NC
- resistor type and packaging
DESCRIPTION
TYPE
CMA 0204 HF
TOL.
±2%
ORDERING CODE 2312 ... .....
BLISTER TAPE ON REEL
BL
3000 UNITS
.... 158 2 ....
PART NUMBER AND PRODUCT DESCRIPTION
1)
PART NUMBER
2)
: CMA0204AX1000GB300
C
MODEL/SIZE
CMA0204
M
A
0
2
0
4
A
X
1
0
0
0
G
B
3
0
0
SPECIAL CHARACTER
A
= HF High Frequency
TC
X
= no indication
VALUE
3 digit value
1 digit multiplier
Multiplier
9 = *10
-1
0 = *10
0
TOLERANCE
G
=±2%
PACKAGING
3)
SPECIAL
B3
up to 2 digits
00
= standard
PRODUCT DESCRIPTION
4)
: CMA 0204 2 % HF BL 100R
CMA
MODEL
CMA
0204
SIZE
0204
2%
TOLERANCE
±2%
HF
SUFFIX
HF
= High Frequency
BL
PACKAGING
3)
BL
100R
RESISTANCE VALUE
100R
= 100
Ω
Note
1. Products can be ordered using either the PRODUCT DESCRIPTION or the 12NC.
2. The PART NUMBER is shown to facilitate the introduction of the unified part numbering system. Currently, this PART NUMBER is applicable
in the Americas and in Asia/Pacific only.
3. Please refer to table PACKAGING, see below.
4. For CMA0204 the temperature coefficient is not identified in the PRODUCT DESCRIPTION.
Document Number: 28759
Revision: 18-Jul-06
For technical questions contact: ff3bresistors@vishay.com
www.vishay.com
59
CMA 0204 HF
Vishay Beyschlag
Pulse Load MELF Resistors for High
Frequency Applications
PACKAGING
TYPE
DIAMETER
CMA 0204 HF
180 mm/7"
BLISTER TAPE ON REEL
ACC. IEC 60286-3
PIECES/REEL
3000
CODE
B3 = BL
DIMENSIONS
L
Color code marking
1)
D
D1
K
L1
DIMENSIONS
- MELF resistor types, mass and relevant physical dimensions
TYPE
L
(mm)
3.6 + 0/- 0.2
D
(mm)
1.4 + 0/- 0.1
L
1 min
(mm)
1.8
D
1
(mm)
D + 0/- 0.15
K
(mm)
0.8 ± 0.1
MASS
(mg)
19
CMA 0204 HF
1)
Color code marking is applied according to IEC 60062* in four bands. Each color band appears as a single solid line, voids are permissible if
at least 2/3 of the band is visible from each radial angle of view. The last color band for tolerance is approximately 50 % wider than the other
bands. Interrupted bands left and right of the 3rd full band indicate the special carbon film high frequency type.
TOLERANCE AND RESISTANCE RANGE
TYPE
TOLERANCE
RESISTANCE VALUE
50
Ω
47
Ω
to 300
Ω
1)
CMA 0204 HF
±2%
1)
Please select resistance values for ± 2 % tolerance from the E24 series.
www.vishay.com
60
For technical questions contact: ff3bresistors@vishay.com
Document Number: 28759
Revision: 18-Jul-06
CMA 0204 HF
Pulse Load MELF Resistors for High
Frequency Applications
DESCRIPTION
Production of the CMA 0204 HF speciality MINI-MELF
resistor is strictly controlled and follows an extensive set of
instructions established for reproducibility. A homogeneous
and dense carbon film is deposited on a high grade ceramic
body (85 % Al
2
O
3
). Nickel plated steel termination caps are
firmly pressed on the coated rods. A special laser is used to
achieve the target value by smoothly cutting a non helical
pattern with a resulting low inductivity in the resistive layer
without damaging the ceramics. The resistor elements are
covered by a protective coating designed for electrical,
mechanical and climatic protection.The terminations receive
a final pure tin on nickel plating. Four color code rings
designate the resistance value and tolerance in accordance
with
IEC 60062*.
The result of the determined production is verified by an
extensive testing procedure performed on 100 % of the
individual resistors. Only accepted products are laid directly
into the blister tape in accordance with
IEC 60286-3*.
Vishay Beyschlag
APPROVALS
Where applicable the resistors are tested in accordance with
EN 140401-803
which refers to
EN 60115-1, EN 140400
and
the variety of enviromental text procedures of the
IEC 60068*
series.
Vishay BEYSCHLAG has achieved
"Approval of
Manufacturer"
in accordance with
IEC QC 001002-3,
clause 2.
The release certificate for
“Technology Approval
Schedule”
in accordance with
CECC 240001
based on
IEC QC 001002-3, clause 6
is granted for the Vishay
BEYSCHLAG manufacturing process.
Note:
* The quoted IEC standards are also released as EN standards with
the same number and identical contents.
ASSEMBLY
The resistors are suitable for processing on automatic
SMD assembly systems. They are suitable for automatic
soldering using wave, reflow or vapour phase as shown in
IEC 61760-1*.
Excellent solderability is proven, even after
extended storage in excess of 10 years. The encapsulation
is resistant to all cleaning solvents commonly used in the
electronics industry, including alcohols, esters and aqueous
solutions. The resistors are completely lead (Pb)-free, the
pure tin plating provides compatibility with lead (Pb)-free
soldering processes. The immunity of the plating against tin
whisker growth has been proven under extensive testing.
All products comply with the
GADSL
1)
and the
CEFIC-
EECA-EICTA
2)
list of legal restrictions on hazardous
substances. This includes full compliance with the following
directives:
•
2000/53/EC End of Vehicle life Directive (ELV) and the
Annex II (ELV II)
•
2002/95/EC Restriction of the
Substances Directive (RoHS)
use
of
Hazardous
•
2002/96/EC Waste Electrical and Electronic Equipment
Directive (WEEE)
1)
2)
Global Automotive Declarable Substance List, see www.gadsl.org
CEFIC (European Chemical Industry Council), EECA (European
Electronic Component Manufacturers Association), EICTA
(European trade organisation representing the information and
communications technology and consumer electronics), see
www.eicta.org -> issues -> environment policy -> chemicals ->
chemicals for electronics
For technical questions contact: ff3bresistors@vishay.com
www.vishay.com
61
Document Number: 28759
Revision: 18-Jul-06
CMA 0204 HF
Vishay Beyschlag
FUNCTIONAL PERFORMANCE
Power Dissipation
P
Pulse Load MELF Resistors for High
Frequency Applications
1
Power Operation
Standard Operation
W
0.5
0
- 50
0
50
70
100
C
150
Ambient Temperature
ϑ
amb
Derating - Standard Operation
Pulse Voltage
U
1 kV
100 V
10 V
100
Ω
10 kΩ
Resistance Value
R
1.2/50 Pulse
Pulse load rating in accordance
with
IEC 60115-1, 4.27; 1,2 µs/50 µs; 5 pulses at 12 s intervals;
for permissible resistance change 0.5
%
|Z|/R
2.0
1.5
50
Ω
1.0
0.5
0.1 GHz
1.0 GHz
10.0 GHz
Frequency
f
RF - Behaviour
www.vishay.com
62
For technical questions contact: ff3bresistors@vishay.com
Document Number: 28759
Revision: 18-Jul-06
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
