SR37
Vishay BCcomponents
Surge Metal Film Leaded Resistor
FEATURES
•
Metal film technology
•
High pulse load (up to 10 kV) capability
•
Replacement for carbon-composition resistors
•
Compatible with lead (Pb)-free and lead containing
soldering processes
•
Compliant to RoHS directive 2002/95/EC
A multi layer metal film is deposited on a high grade ceramic
body. After a helical groove has been cut in the resistive
layer, tinned electrolytic copper wires are welded to the
end-caps. The resistors are coated with a light blue
non-flammable lacquer, which provides electrical,
mechanical, and climatic protection.
The encapsulation is resistant to all cleaning solvents in
accordance with IEC 60068-2-45.
APPLICATIONS
•
Automotive
•
Telecommunication
•
Industrial
•
Medical equipment
TECHNICAL SPECIFICATIONS
DESCRIPTION
Resistance Range
Resistance Tolerance
Temperature Coefficient
Climatic Category
(LCT/UCT/Days)
Rated Dissipation,
P
70
Rated Voltage,
U
max.
Voltage Proof on Insulation
Basic Specification
Stability After:
Load (1000 h,
P
70
)
Long Term Damp Heat Test (56 Days)
Soldering (10 s, 260 °C)
High Voltage Pulse Test for R-Value
≤
4.7 kΩ, 10 kV; 1 nF; 50 x 12/Min
± (3 %
R
+ 0.1
Ω)
± (3 %
R
+ 0.1
Ω)
± (1 %
R
+ 0.1
Ω)
± 20 %
SR37
220
Ω
to 10 kΩ
± 10 %, ± 20 %, E12 series
± 250 ppm/K
55/155/56
0.5 W
P
n
x
R
700 V
IEC 60115-1
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Document Number: 30259
Revision: 19-Oct-09
SR37
Surge Metal Film Leaded Resistor
Vishay BCcomponents
PART NUMBER AND PRODUCT DESCRIPTION
PART NUMBER: SR03700001501KR500
(1)
S
MODEL/SIZE
SR03700
R
0
3
7
0
0
0
0
1
5
0
1
K
R
5
0
0
SPECIAL
Up to 2 digits
00
= Standard
VARIANT
0
= Neutral
TCR/MATERIAL
0
= Standard
VALUE
3 digit value
1 digit multiplier
MULTIPLIER
3
= *10
3
4
= *10
4
5
= *10
5
TOLERANCE
K
= ± 10 %
M
= ± 20 %
PACKAGING
(2)
A1
R5
PRODUCT DESCRIPTION: SR037 10 % R5 1K5
SR037
MODEL
SR03700
10 %
TOLERANCE
± 10 %
± 20 %
R5
PACKAGING
(2)
A1
R5
1K5
RESISTANCE VALUE
1K5
= 1.5 kΩ
Notes:
(1)
(2)
The PART NUMBER is shown to facilitate the introduction of the unified part numbering system
Please refer to table PACKAGING, see next page
PACKAGING
REEL
MODEL
PIECES
SR37
5000
CODE
R5
PIECES
1000
CODE
A1
BOX
DIMENSIONS
L
1
Ø
D
Ø
d
L
2
A
DIMENSIONS
- Resistor types, mass and relevant physical dimensions
TYPE
SR37
L
1 max.
(mm)
9.0
L
2 max.
(mm)
11.0
D
max.
(mm)
4.0
Ød
(mm)
0.80 ± 0.03
A
(mm)
52.5 ± 1.5
MASS (g)/
100 pieces
50.5
MARKING
The nominal resistance and tolerance are marked on the resistor using three colored bands for ± 20 % tolerance and four bands
for ± 10 % tolerance in accordance with IEC 60062, marking codes for resistors and capacitors. Standard values of nominal
resistance are taken from the E12 series for resistors with a tolerance of ± 10 % or ± 20 %. The values of the E12 series are in
accordance with IEC 60063.
Document Number: 30259
Revision: 19-Oct-09
For technical questions, contact:
filmresistorsleaded@vishay.com
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155
SR37
Vishay BCcomponents
Surge Metal Film Leaded Resistor
FUNCTIONAL PERFORMANCE
Power Dissipation
P
100
0
- 55
0
70
155
Ambient temperature
ϑ
amb
Derating - Standard Operation
Maximum dissipation (P
max.
) in percentage of rated power as a function of ambient temperature (T
amb
)
PULSE LOADING CAPABILITY
100 000
P
(W)
10 000
1000
100
10
1
0.000001
0.00001
0.0001
0.001
0.01
0.1
t
i
(s)
1
Pulse on a regular basis; maximum permissible peak pulse power (P
max
) as a function of pulse duration (t
i
) for single pulse condition
TESTS AND REQUIREMENTS
Essentially all tests are carried out in accordance with IEC 60115-1, category 55/155/56 (rated temperature range - 55 to + 155
°C; damp heat, steady state, 56 days). The tests are carried out in accordance with IEC 60068-2-xx.
Test method under standard atmospheric conditions according to IEC 60068-1, 5.3. In the Test Procedures and Requirements
table the tests and requirements are listed with reference to the relevant clauses of IEC 60115-1 and IEC 60068-2-xx test
methods. A short description of the test procedure is also given. In some instances deviations from IEC applications were
necessary for our specified method.
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Document Number: 30259
Revision: 19-Oct-09
SR37
Surge Metal Film Leaded Resistor
Vishay BCcomponents
PERFORMANCE
IEC
60115-1
CLAUSE
4.8
4.25.1
IEC
60068-2-xx
TEST
METHOD
-
-
TEST
Temperature
coefficient
Endurance at 70 °C
Damp heat,
steady state
Climatic sequence
Dry heat
Damp heat
(accelerated)
Cold
Damp heat,
(accelerated)
remaining cycles
Rapid change of
temperature
PROCEDURE
REQUIREMENTS
PERMISSIBLE CHANGE (ΔR)
SR37
Between - 55 °C and + 155 °C
1000 h;
loaded with
P
70
or
U
max.
;
1.5 h ON; 0.5 h OFF
56 days; 40 °C;
90 % to 95 % RH
loaded with 0.01
P
70
155 °C; 16 h dry heat
24 h; 25 °C to 55 °C;
90 % to 100 % RH
1
st
cycle
- 55 °C; 2 h
5 days; 25 °C to 55 °C
90 % to 100 % RH
30 min at LCT;
30 min at UCT;
LCT = - 55 °C;
UCT = 155 °C;
5 cycles
Steps of:
5/10/16/25/40 x
P
70
duration
5 min
Application of test flame for 20 s
For R-value
≤
4.7 kΩ, 10 kV;
1 nF; 50 x 12/min
(in accordance with
IEC 60065 14.1.a)
± 250 ppm/K
± (3 %
R
+ 0.1
Ω)
± (3 %
R
+ 0.1
Ω)
4.24
4.23
4.23.2
4.23.3
4.23.4
4.23.6
78 (Cab)
2 (Ba)
30 (Db)
1 (Aa)
30 (Db)
± (3 %
R
+ 0.1
Ω)
4.19
14 (Na)
No visual damage
± (1 %
R
+ 0.1
Ω)
4.26
-
Active flammability
“Cheese-cloth test“
Passive flammability
“Needle-flame test“
High voltage pulse
test
Robustness of
terminations:
Tensile all samples
Bending half number
of samples
Torsion other half of
samples
No flaming of gauze cylinder
No ignition of product
no ignition of under-layer
burning time less than 30 s
± 20 %
R
-
-
-
-
4.16
4.16.2
4.16.3
4.16.4
21 (Ua1)
21 (Ub)
21 (Uc)
Load 10 N; 10 s
Load 5 N; 4 x 90°
3 x 360° in opposite direction
Frequency 10 Hz to 500 Hz;
displacement
1.5 mm or acceleration 10 g;
3 directions;
total 6 h (3 x 2 h)
2 s; 235 °C: Solder bath method;
SnPb40
3 s; 245 °C: Solder bath method;
SnAg3Cu0.5
Thermal shock: 10 s; 260 °C;
3 mm from body
Isopropyl alcohol or H
2
O
followed by brushing
U
= 500 V
DC
during 1 min,
V-block method
U
RMS
= 700 V
during 1 min,
V-block method
No damage
± (1 %
R
+ 0.1
Ω)
4.22
6 (Fc)
Vibration
± (1 %
R
+ 0.1
Ω)
4.17
20 (Ta)
Solderability
(after ageing)
Resistance to
soldering heat
Component solvent
resistance
Insulation resistance
Voltage proof on
insulation
Good tinning
(≥ 95 % covered);
no visible damage
± (1 %
R
+ 0.1
Ω)
No visible damage
R
ins
min. 10
4
MΩ
4.18
4.29
4.6.1.1
20 (Tb)
45 (XA)
-
4.7
-
No flashover or breakdown
Document Number: 30259
Revision: 19-Oct-09
For technical questions, contact:
filmresistorsleaded@vishay.com
www.vishay.com
157
SR37
Vishay BCcomponents
Surge Metal Film Leaded Resistor
12NC INFORMATION FOR HISTORICAL CODING REFERENCE ONLY
•
The resistors have a 12 digit ordering code starting with
2306
•
The next 5 digits indicate the resistor type and packaging.
The last 3 digits indicate resistance value in which:
- The first 2 digits indicate the resistance value
- The last digit indicates the resistance decade in
accordance with table
Last Digit of 12NC Indicating Resistance Decade
RESISTANCE DECADE
220
Ω
to 910
Ω
1 kΩ to 9.1 kΩ
10 kΩ
LAST DIGIT
1
2
3
12NC Example
SR37, 1.5 kΩ, ± 10 %, reel 5000 pieces is
2306 245 33152
12NC
- Resistor type and packaging
2306 ... .....
DESCRIPTION
BANDOLIER IN AMMOPACK
TYPE
TAPE WIDTH
TOLERANCE
± 10 %
SR37
52.5
± 20 %
245 11...
245 23...
1000 UNITS
245 31....
BANDOLIER ON REEL
5000 UNITS
245 33....
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Document Number: 30259
Revision: 19-Oct-09
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