PILKOR components
Bleeder resistors
BR 0.5W/1W
FEATURES
 Excellent anti-surge characteristics
 Stable characteristics to moisture
resistance even in high resistance
range.
 Good replacement for ceramic
plate resistors.
APPLICATIONS
 Telecommunication
 Industrial
 Medical equipments
 Laser printer
Dimensions ( mm )
TYPE
D
0.8
L1
0.8
L2
Max.
d
(0.05)
BR37L
4.0
12
14
0.7
BR52
6.0
16
18
0.8
DESCRIPTION
A metal glazed film is deposited on a high grade ceramic body. After a helical groove
has been cut in the resistive layer, tinned electrolytic copper wire are welded to the
end- caps. The resistors are coated with a red non flammable lacquer witch provides
electrical, mechanical and climatic protection.
QUICK REFERENCE DATA
VALUE
DESCRIPTION
BR37L
1 ㏁ to 500 ㏁
resistance range
resistance tolerance
BR52
5%, 2%, 1% ( E12, E24,E48 series )
 250 ppm / ℃
temperature coefficient
rated dissipation at Tamb = 70 ℃
0.5 W
1W
max. working voltage
8000 V
10000 V
basic specifications
IEC 60 115-1B
climatic category (IEC60068)
55 / 155 / 56
Dielectric withstanding voltage
700VRMS during 1 minute
V - block method
no breakdown
- 65 -
PILKOR components
Bleeder resistors
BR 0.5W/1W
ORDERING INFORMATION
Ordering code indicating resistor types and packing
Table 1
Type
Bandolier
width
Packing
Quantity
Resistance
range
Tol.
%
Ordering code
BR37L
0.5W
52mm
ammo
1000
1 ㏁ to 500 ㏁
5
2
1
PPBR 144 13xxx
PPBR 144 14xxx
PPBR 144 4xxxx
Type
Bandolier
width
Packing
Quantity
Resistance
range
Tol.
%
Ordering code
BR52
1W
64mm
ammo
500
1 ㏁ to 500 ㏁
5
2
1
PPBR 145 13xxx
PPBR 145 14xxx
PPBR 145 4xxxx
Table 2
Table 3. Last digit of 12NC
Resistance decade
Last digit
1 to 9.76 ㏁
5
10 to 97.6 ㏁
6
100 to 976 ㏁
7
Ordering Example
The ordering code of a BR37L- 0.5W resistor, value 200 ㏁ 5%, taped on a bandolier of
1000 units in ammopack is: PPBR 144 13207.
Limiting values
Table 4
TYPE
LIMITING VOLTAGE
(V)
LIMITING POWER
(W)
BR37L
8000
0.5
BR52
10000
1
The maximum permissible hot – spot temperature is 155 ℃.
- 66 -
PILKOR components
Bleeder resistors
BR 0.5W/1W
DERATING
The power that the resistor can dissipate depends on the operating temperature : Fig. 1
Pmax.
( %)
100
50
0
-55
0
50
70
100
155
Tamb ( ℃ )
Fig. 1 Maximum dissipation ( Pmax ) in percentage of rated power as a function of the
ambient Temperature ( Tamb )
Surge resistance characteristics
%
0
0.5W 1W
-5
-10
-15
0
2KV
4KV
6KV
8KV
10KV
12KV
14KV
Fig. 2 Maximum allowed peak surge voltage in accordance with “IEC 60065 chapter
14.1” 10 discharges form a 10nF capacitor
charged to Vmax ; 12 discharges / minute
- 67 -
PILKOR components
Bleeder resistors
BR 0.5W/1W
Application information
BR37L – 0.5W
Fig. 3 Hot – spot temperature rise (  T ) as
a function of dissipated power
Fig.4 Temperature rise ( T ) at the lead end of
the lead soldering point as a function
of dissipated power at various lead
lengths after mounting
BR52 – 1W
Fig. 6 Hot – spot temperature rise (  T ) as
a function of dissipated power
Fig.7 Temperature rise ( T ) at the lead end of
the lead soldering point as a function
of dissipated power at various lead
lengths after mounting
- 68 -
PILKOR components
Bleeder resistors
BR 0.5W/1W
MECHANICAL DATA
Table 5. Mass per 100 units
TYPE
MASS ( g )
BR37L – 0.5W
67
BR52 - 1W
148
MARKING
The nominal resistance and tolerance are marked on the resistor using four or five colored
bands in accordance with IEC publication 60 062 “color codes for fixed resistors”
TEST AND REQUIREMENTS
Table 6. Test procedures and requirements
TEST
REQUIREMENTS
PROCEDURE
BR37L
BR52
robustness of
terminations:
tensile all
samples
φ 0.7 / 0.8 mm
: load 10N:10s
bending half
number of
samples
φ 0.7 / 0.8 mm
: load 5N: 4x90
number of failures < 10 x 10 -6
torsion other
half number
samples
solderability
3x360in opposite
directions
no damage
0.25%  0.05 
2 s ; 235℃ flux 600
Thermal shock: 3 s; 360℃
6mm from body
30 minutes at –55℃ and
30 minutes at +155℃;5cycles
frequency 10 to 500 Hz;
displacement 1.5mm or
acceleration 10g; 3 directions
total 6 hours(3x2 hours)
56 days; 40 ℃; 90 to 95% RH
dissipation 0.01 Pn
1000 hours at 70 ℃;
Pn or Vmax
good tinning; no damage
temperature
coefficient
between –55 ℃and +155 ℃
 250 ppm / ℃
dielectric
withstanding
voltage
700VRMS during 1min.
V- block method
no breakdown
soldering heat
rapid change of
temperature
vibration
damp heat
endurance
number of failures < 10 x 10 -6
- 69 -
 0.5% +0.05
 0.5% +0.05
no damage
 1% +0.05
 1.5% + 0.1
 1.5% + 0.1
PILKOR components
Bleeder resistors
BR 0.5W/1W
TEST AND REQUIREMENTS
TEST
PROCEDURE
REQUIREMENTS
BR37L
insulation
resistance
short time
overload
overload test
500VDC during 1 minute ;
V – block method
rated voltage x 2.5
5 s on 45 s off (V  Vmax)
10 cycles
R < 10 ㏁: 5000VRMS during 3sec
R  10 ㏁: 8000VRMS during 3sec
Switch
high voltage
surge test
10KV
1㏀
0.01 ㎌
min. : 10000 ㏁
 1% + 0.1
no evidence of flash
over, mechanical
damage, arcing or,
insulation breakdown
 10% + 0.1
Circuits
10 discharges from a 10 nF capacitor
charged to 10KV. ;12 discharges / minute
- 70 -
BR52