CMA 0204
Vishay Beyschlag
High Pulse Load MELF Resistors
FEATURES
•
•
•
•
•
Special carbon film technology
Up to 4 kV single pulse capability
Up to 70 W continuous pulse load
ESD capability: 6 kV, human body model
Compatible with lead (Pb)-free and lead
containing soldering processes
•
Compliant to RoHS directive 2002/95/EC
CMA 0204 specialty MELF resistors with advanced pulse
load capability are the perfect choice for the protection of
circuitry with signal or mains input lines from surge pulses.
The resistors are also suitable for circuits exposed to high
levels of electromagnetic interference or electrostatic
discharge. The applications are in all fields of automotive,
telecommunication, industrial and medical equipment.
APPLICATIONS
•
•
•
•
Automotive
Telecommunication
Industrial
Medical equipment
METRIC SIZES
DIN
CECC
0204
RC 3715M
TECHNICAL SPECIFICATIONS
DESCRIPTION
Metric CECC size
Resistance range
Resistance tolerance
Temperature coefficient
Operation mode
Climatic category (LCT/UCT/days)
Rated dissipation,
P
70 (1)
Operating voltage,
U
max.
AC/DC
Film temperature
(2)
Max. resistance change at
P
70
for resistance range,
ΔR/R
after:
1000 h
8000 h
Permissible voltage against ambient (insulation):
1 min;
U
ins
Continuous
Failure rate: FIT
observed
300 V
75 V
≤
0.1 x 10
-9
/h
≤
1%
≤
2%
125
°C
10
Ω
to 100 kΩ
≤
2%
≤
4%
Standard
55/125/56
0.25 W
200 V
155
°C
CMA 0204
RC 3715M
10
Ω
to 100 kΩ
±2%
See TCR graph
Power
55/155/56
0.4 W
Notes
• 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.
(2)
Film temperatures above the specified range may be permissible, e.g. 175 °C. Please contact the factory for details.
** Please see document “Vishay Material Category Policy”:
www.vishay.com/doc?99902
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58
For technical questions, contact:
melf@vishay.com
Document Number: 28717
Revision: 01-Mar-10
CMA 0204
High Pulse Load MELF Resistors
Vishay Beyschlag
DIMENSIONS
L
K
L
1
D
1
D
DIMENSIONS AND MASS
TYPE
CMA 0204
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
Note
• Color code marking is applied according to IEC 60062
(3)
in four bands (E24 series). 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. An interrupted band between the 2
nd
and 3
rd
full band identifies the special carbon film.
PATTERN STYLES FOR MELF RESISTORS
G
Y
Z
X
RECOMMENDED SOLDER PAD DIMENSIONS
WAVE SOLDERING
TYPE
G
(mm)
1.5
Y
(mm)
1.5
X
(mm)
1.8
Z
(mm)
4.5
G
(mm)
1.7
REFLOW SOLDERING
Y
(mm)
1.2
X
(mm)
1.6
Z
(mm)
4.1
CMA 0204
Note
• The given solder pad dimensions reflect the considerations for board design and assembly as outlined e.g. in standards IEC 61188-5-x, or in
publication IPC-7351. They do not guarantee any supposed thermal properties, however, they will be found adequate for most general
applications.
Document Number: 28717
Revision: 01-Mar-10
For technical questions, contact:
melf@vishay.com
www.vishay.com
59
CMA 0204
Vishay Beyschlag
High Pulse Load MELF Resistors
PART NUMBER AND PRODUCT DESCRIPTION
Part Number: CMA02040X4701GB300
C
MODEL/SIZE
CMA0204
M
A
0
2
0
4
0
X
4
7
0
1
G
B
3
0
0
SPECIAL CHARACTER
0
= Neutral
TCR
X
= No indication
VALUE
3 digit value
1 digit multiplier
Multiplier
9
= *10
-1
0
= *10
0
1
= *10
1
2
= *10
2
3
= *10
3
TOLERANCE
G
=±2%
PACKAGING
SPECIAL
B3
Up to 2 digits
B0
00
= Standard
Product Description: CMA 0204 2 % BL 4K7
CMA
MODEL
CMA
0204
SIZE
0204
2%
TOLERANCE
±
2
%
BL
PACKAGING
BL
B0
4K7
RESISTANCE VALUE
100R
= 100
Ω
4K7
= 4.7 kΩ
Note
• Products can be ordered using either the PART NUMBER or the PRODUCT DESCRIPTION.
PACKAGING
BLISTER TAPE ON REEL
ACC. IEC 60286-3
DIAMETER
180 mm/7"
CMA 0204
330 mm/13"
10 000
B0
PIECES/REEL
3000
CODE
B3 = BL
MODEL
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60
For technical questions, contact:
melf@vishay.com
Document Number: 28717
Revision: 01-Mar-10
CMA 0204
High Pulse Load MELF Resistors
Vishay Beyschlag
DESCRIPTION
Production of the CMA 0204 specialty MELF resistors with
advanced pulse load capability 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 helical groove in the resistive
layer without damaging the ceramics. The resistors are
covered by 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 60 062
(3)
.
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 60 286-3
(3)
.
APPROVALS
Where applicable the resistors are tested in accordance with
EN 140401-803
(superseding
CECC 40401-803)
which
refers to
EN 60115-1, EN 140400
and the variety of
enviromental text procedures of the
IEC 60068
(3)
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.
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
(3)
. 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 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)
Notes
(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/index.php?id=995
→
issues
→
environment policy
→
chemicals
→
chemicals for electronics.
The quoted IEC standards are also released as EN standards with the same number and identical contents.
For technical questions, contact:
melf@vishay.com
www.vishay.com
61
(3)
Document Number: 28717
Revision: 01-Mar-10
CMA 0204
Vishay Beyschlag
FUNCTIONAL PERFORMANCE
Power Dissipation
P
High Pulse Load MELF Resistors
1
CMA 0204
W
0.5
0
- 50
0
50
70
100
°C
150
Ambient Temperature
ϑ
amb
Derating - Standard Operation
Power Dissipation
P
1
CMA 0204
W
0.5
0
- 50
0
50
70
100
°C
150
Ambient Temperature
ϑ
amb
Derating - Standard Operation
Pulse Load
P
max.
100
W
10
CMA 0204
1
0.1
10 µs
100 µs
1 ms
10 ms
100 ms
1s
10 s
Pulse Duration
t
i
Single
Maximum pulse load, single pulse; applicable if
P
0 and n
≤
1000 and
U
≤
U
max.
;
for permissible resistance change equivalent to
8000
h operation
Pulse
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62
For technical questions, contact:
melf@vishay.com
Document Number: 28717
Revision: 01-Mar-10
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