RH HR RER
Vishay Sfernice
High Reliability Wirewound
Power Resistors
FEATURES
As defined in the ESA/SCC specifications two quality levels
are proposed :
• Level B with serialized components,
• Level C without serialization.
• Mount onto a heatsink
Originally developed for space application, these resistors are
housed in an aluminum body with a hard anodic coating.
These components are manufactured, selected and tested
to ESA /SCC 4003 specification.
The variants offered differ only by the terminal sizes.
• ESA/SCC 4003
DIMENSIONS
in millimeters
ØK
O
H
G
B
SERIES
DIM.
A
B
C
D
E
F
G
H
J
ØK
L
M
N
ØP
Q
R
RH HR 5
VARIANT 03
VARIANT 01
MAX.
MIN.
MAX.
MIN.
27.01
12.20
1.19
11.03
13.67
5.19
6.91
5.43
15.62
2.23
7.34
1.81
0.86
1.14
1.20
2.16
30.15
12.70
2.77
11.23
16.81
8.33
10.05
7.01
17.20
2.49
8.92
4.95
2.44
1.40
1.40
–
27.01
12.20
1.19
11.03
13.67
5.19
6.91
5.43
15.62
2.23
7.34
1.81
0.86
2.03
1.95
3.56
30.15
12.70
2.77
11.23
16.81
8.33
10.05
7.01
17.20
2.49
8.92
4.95
2.44
2.29
2.15
–
D
L
N
J
E
F
P
(2 holes)
R
M
C
A
RH HR 10
VARIANT 01
MIN.
MAX.
36.50
33.36
16.13
15.63
3.18
1.60
14.52
14.02
20.62
17.43
9.49
6.35
12.7
9.56
8.71
7.13
21.41
19.83
2.52
2.26
11.10
9.52
6.73
3.59
3.18
1.60
2.29
2.03
2.15
1.95
–
3.56
ELECTRICAL SPECIFICATIONS
VISHAY SFERNICE DESIGNATION
ESA Designation
ESA Specification Applied
Power Rating
At
+ 70°C
+ 25°C
4W
mounted
RH HR 5
RER 60
4003/001
2.4W
unmounted
RH HR 10
RER 65
4003/002
8W
mounted
4.8W
unmounted
5W
mounted
3W
unmounted
10W
mounted
6W
unmounted
Limiting Element Voltage
160V
0.05Ω
1Ω
≤
R < 1Ω ± 100ppm/°C
≤
R < 20Ω ± 50ppm/°C
R
≥
20Ω ± 30ppm/°C
Code 4
Code 3
Code 9
250V
Temperature Coefficient
Qualified Ohmic Range
Tolerance
Temperature Range
Document Number: 56006
Revision 14-Jun-02
1Ω to 1kΩ
± 0.5% to ± 1%
– 55°C to + 275°C
For technical questions, contact sfer@vishay.com
1Ω to 2kΩ
www.vishay.com
11
RH HR RER
Vishay Sfernice
PERFORMANCE
TESTS
Insulation Resistance
CONDITIONS
UT = 500 V
LIMIT DRIFTS
10Ω G min.
0.05Ω
R
High Reliability Wirewound
Power Resistors
Soldering (Thermal Shock)
Short Time Overload
(Chassis Mounted)
Terminal Strength
T=
+
260°C t < 10s
U =
√
5 x Pn x Rn t + 5 s
CEI 68-2-21
Tests Ua
CEI 68-2-14
5 cycles
CEI 68-2-6
10/2000Hz 20g
SCC 4003 and CEI 68-2- ..
– 55°C/+ 275°C/5 cycles
2000h at rated power at + 25°C, 90’/30’ cycle
± (0.3 +
± (0.3 +
x 100)%
0.05Ω
x 100)%
R
± (0.2 + 0.05Ω x 100)%
R
± (0.5 + 0.05Ω
R
± (0.2 +
± (1 +
0.05Ω
R
x 100)%
x 100)%
Rapid Temperature Change
Vibration
Climatic Sequence
0.05
x 100)%
R
Insulation resistance
≥
10
3
MΩ
± (1 +
0.05Ω x 100) %
R
Load Life
POWER RATING CHART
1
10
PACKAGING
Resistors are packaged in transparent blister pack:
RH HR 5 type: 20 resistors per blister pack,
RH HR 10 type: 15 resistors per blister pack.
On the blister, information printed is: SFERNICE designation,
ESA/SCC detail specification, quality level, ohmic value,
tolerance and manufacturing date code.
POWER DISSIPATION IN WATTS
2
3
5
4
3
1: RH
2: RH
3: RH
4: RH
HR
HR
HR
HR
10 mounted
10 unmounted
5 mounted
5 unmounted
0
0
25
70
100
200
275
AMBIENT TEMPERATURE IN DEGREES CELSIUS
MARKING
The SCC component number is print marked on the aluminum body. It shows: the number of the detail specification which
refers to the generic specification of the resistor, the SCC variant number, the quality level B or C, the ohmic value (4 digit
code), the tolerance (letter code) D : ± 0.5%, F : ± 1%, G: ± 2%, J : ± 5%; the temperature coefficient (1 digit) 9 for ± 30ppm/°C,
3 for ± 50ppm/°C and 4 for ± 100ppm/°C; the manufacturing date code (4 digits: two for the year and two for the week), the
identification lot, the manufacturer logo.
ORDERING INFORMATION
RH HR
MODEL
5
VERSION
5
10
100Ω
OHMIC VALUE
± 1%
TOLERANCE
03
SCC VARIANT
01
03
B1
QUALITY LEVEL
B1
B2
B3
C1
C2
C3
www.vishay.com
12
For technical questions, contact sfer@vishay.com
Document Number: 56006
Revision 14-Jun-02
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