C&H Technology RH - Manual (Page 3)

RH
Heatsink Encased Wirewound Power Resistors Vishay Sfernice
Document Number: 50013 For technical questions, contact: [email protected] www.vishay.com
Revision: 07-Dec-06 53
MOMENTARY OVERLOAD
1. Momentary overload (> 2 s):
See example in table below. In all cases, it should be understood that:
- the 12 Pn overload applies only to ohmic values 0.1.
- the overload voltage shall not be higher than that used for the dielectric strength test (see Standard Electrical Specifications).
2. Short time overload (< 2 s):
For times shorter than 2 seconds, higher overloads can be sustained in some cases. Consult VISHAY SFERNICE.
POWER RATING CHART
MARKING
VISHAY SFERNICE trademark, model, style, CECC style (if
applicable) nominal resistance (in
Ω), tolerance (in %),
manufacturing date.
TEMPERATURE RISE
PACKAGING
Bag of 10 units
PERFORMANCE
MIL-R-18546 D NF C 83-210
TYPICAL DRIFTS
TESTS CONDITIONS REQUIREMENTS
Operating Temperature Range - 55 °C + 200 °C - -
Momentary Overload 5 Pr/5 s ± (0.25 % + 0.05 Ω) ± (0.1 % + 0.05 Ω)
Climatic Sequence
- 55 °C + 200 °C
5 cycles
± (0.25 % + 0.05
Ω)
± (0.1 % + 0.05
Ω)
Load Life Test at High
Temperature
2 h at + 275 °C
± (1 % + 0.05
Ω)
Ins. resistance ≥ 1 GΩ ± (0.1 % + 0.05
Ω)
Humidity (Steady State) 56 days
± (1 % + 0.05)
Ins. resistance
≥ 100 MΩ ± (0.5 % + 0.05
Ω)
Resistance to Moisture
Climatic sequences test, with load
and polarisation
± (1 % + 0.05
Ω)
± (0.5 % + 0.05
Ω)
Temperature Coefficient
5 to 10
> 10
± 50 ppm/°C
± 25 ppm/°C
± 15 ppm/°C
Load Life
at Maximum Temperature 1000 h 25 °C Pn MIL VISHAY ± (1 % + 0.05
Ω)
± (0.1 % + 0.05
Ω)
200 °C 30 % of Pn SFERNICE Ins. resistance ≥ 1 GΩ ± (0.5 % + 0.05 Ω)
POWER LOADING DURATION
2.5 Pn 10 s
5 Pn 5 s
12 Pn 2 s
AMBIENT TEMPERATURE IN °C
R
E
W
O
P
D
E
T
A
R
%
100
75
50
25
0
0 50 100 150 200 250 275 300 350
RATED POWER IN WATTS
(Mounted on heatsink chassis)
C °
N I
E
R
U
T
A
R
E
P
M
E
T
T
O
P
S
T
O
H
200
150
100
50
0
0 10 20 30 40 50 60 70
H
R
0 1
H
R
5
H R
5 2
0 5
H R
ORDERING INFORMATION
RH 5 NI 18U ± 5 % BA10 e1
MODEL STYLE NON INDUCTIVE
WINDING
Optional
SPECIAL
DESIGN
Method N°
Optional
OHMIC VALUE
Custom items are subject to
extra-charge and min. order.
Please see price list.
TOLERANCE PACKAGING LEAD
(Pb)-FREE
SAP PART NUMBERING GUIDELINES
RH 05 N 18R00 J S03
MODEL STYLE NON INDUCTIVE
WINDING
Optional
OHMIC VALUE TOLERANCE PACKAGING