RCEC 850
www.vishay.com
Vishay MCB
Power Resistors Cooled by Auxiliary Heatsink (Not Supplied)
Thick Film Technology
FEATURES
• Technology: thick film deposited on ceramic
• Cold system without external radiation
• High power / volume ratio
• Non-inductive
• Easy assembly, self calibrated pressure (400 N)
• Possible configuration with 2 or 3 resistors
• Material categorization: for definitions of compliance
please see
www.vishay.com/doc?99912
LINKS TO ADDITIONAL RESOURCES
D
D
3
3
3D Models
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
RESISTANCE RANGE
Ω
0.47 to 3
3 to 1M
MAX. RATED POWER
BC
85 °C
W
850
850
TOLERANCE
(1)
±%
10, 5
10, 5
TEMPERATURE COEFFICIENT
± ppm/°C
300
100
E-SERIES
OHMIC
VALUES
E24
RCEC 850
Note
(1)
± 2 % or ± 1 % on special request for limited resistance value and with reduction of maximum power and pulse rating (contact us for details)
MECHANICAL SPECIFICATIONS
UL 94 flame classifications
Resistive element
Substrate
Encapsulation
Material complies with the standard UL 94 V-0
Cermet
Alumina
Resin filled case
TECHNICAL SPECIFICATIONS
PARAMETER
Operating temperature range
Maximum operating voltage
Dielectric strength V
RMS
(50 Hz / 1 min)
Creepage distance
Clearance distance
Nominal power at 85 °C bottom case temperature
Capacitance / ground
Self-inductance
Partial discharge
Insulation
Weight (max.)
RCEC 850
-55 °C to +155 °C
5000 V
7000 V (other cases: contact us)
> 42 mm
> 13 mm
850 W (single resistor), 2 x 350 W (double resistor)
120 pF (typical) / frequency 10 kHz
≤
40 nH (typical) / frequency 10 kHz
< 20 pC at 5000 V
eff
Other cases: consult us
> 100 GΩ at 1000 V
DC
120 g
Revision: 08-Feb-2021
Document Number: 32573
1
For technical questions, contact:
mcbfixedresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
RCEC 850
www.vishay.com
Vishay MCB
PERFORMANCES
TESTS
Overload
Damp heat
VRT
Shock
CONDITIONS
1200 W / 10 s with
θ
bottom case
= 85 °C
4 days 40 °C 93 % HR
-55 °C / +125 °C 21 cycles
18 shocks 3 positive and 3 negative per axis -
100 m/s
2
and 11 ms (IEC 60068-2-27, Ea)
10 sweeps/axis - 7.5 mm at 5 Hz to 8 Hz,
20 m/s
2
at 8 Hz to 200 Hz and
40 m/s
2
at 200 Hz to 500 Hz
(IEC 60068-2-6, Fc)
200 Ncm/100 N
REQUIREMENTS
± 2 % or ± (0.5 % + 0.05
Ω)
± 2 % or ± (0.5 % + 0.05
Ω)
± 2 % or ± (0.5 % + 0.05
Ω)
± (0.5 % + 0.05
Ω)
TYPICAL VALUES
< 0.2 %
< 0.2 %
< 0.1 %
< 0.1 %
Vibrations
± (0.5 % + 0.05
Ω)
± 1 % or ± (0.5 % + 0.05
Ω)
< 0.1 %
Terminal strength
< 0.1 %
Note
• All tests were done in Vishay MCB laboratories conditions
DISSIPATION
Title
900
800
700
600
2nd line
Power (W)
500
400
300
200
100
0
0
20
40
60
80
100 120 140 160
Temperature (°C)
P = f (T°)
OVERLOAD
Title
10000
2500
10000
2000
1000
2nd line
Power (W)
1st line
2nd line
1500
1000
1st line
2nd line
100
500
P = f (t)
1000
100
10
0
1
10
Time (s)
100
10
1000
Permanent Applicable Power (W) as a Function
of Bottom Case Temperature (°C)
Intermittent Overload (Exceptional Operation)
Bottom Case Temperature +85 °C
ENERGY
R < 390
Ω
Repetitive operation = 8 J
Pulse
τ
= 50 μs
Accidental operation = 20 J
Pulse
τ
= 50 μs
120 pulses
R > 390
Ω
Repetitive operation = 4 J
Pulse
τ
= 50 μs
Other
τ
values: consult us
Revision: 08-Feb-2021
Document Number: 32573
2
For technical questions, contact:
mcbfixedresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
RCEC 850
www.vishay.com
Vishay MCB
DIMENSIONS
in millimeters
A
B
(4 x) M5 (M4 available on request)
C D E F
K L
J
G
H
I
DIMENSION
A
B
C
D
E
F
G
H
I
J
K
L
MILLIMETER
MIN.
59.2
35.8
33.8
57
59.7
67
9.5
4.3
13.5
14
23.7
25.5
MAX.
60.8
36.2
34.2
58
60.3
68
10.5
4.9
14.5
14.6
24.7
26
MIN.
2.331
1.409
1.331
2.244
2.350
2.638
0.374
0.169
0.531
0.551
0.933
1.004
INCHES
MAX.
2.394
1.425
1.346
2.283
2.374
2.677
0.413
0.193
0.571
0.575
0.972
1.024
CONFIGURATIONS
1
2
3
4
5
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
Revision: 08-Feb-2021
Document Number: 32573
3
For technical questions, contact:
mcbfixedresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
RCEC 850
www.vishay.com
Vishay MCB
ASSEMBLY
57
.5
±0
.5
M4 min. depth 10
Thermal compound
see section “Cooling”
Mounting screws and washers are supplied.
Electrical screws and washers are not supplied.
Tightening torque for mechanical fixation
Tightening torque for electrical connections
1.8 Nm to 2 Nm
1.8 Nm to 2 Nm
TERMINAL OPTIONS
• Electrical terminals M4
COOLING
The temperature of the heatsink may be maintained at the specified values with:
• Forced air ventilation or internal circulation of a liquid cooling
• Heatsink contact surface: < Ra 6.3 μ
• Evenness defect: 0.05 mm max.
• Surface temperature gradient (isotherm): 20 °C max.
• Thermal compound not supplied (resistance < 0.025 °C / W / 0.05 mm preconized)
• Mounting recommendation:
www.vishay.com/doc?32558
Note
• The user must select the thermal resistance of the heatsink according to the power applied
Revision: 08-Feb-2021
Document Number: 32573
4
For technical questions, contact:
mcbfixedresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
RCEC 850
www.vishay.com
Vishay MCB
1
100K
100K
100K
5%
XXX
BO20
ORDERING INFORMATION
RCEC
850
S
MODEL STYLE
SINGLE
/ CONFIGURATION RESISTANCE RESISTANCE RESISTANCE TOLERANCE CUSTOM PACKAGING
DOUBLE
Value
for single /
first value for
double or
triple
Second value
for double
or triple
Third value
for triple
±5%
± 10 %
Other on
request
GLOBAL PART NUMBER INFORMATION
R
C
E
C
1
1
GLOBAL
MODEL
RCEC 850
2
TERMINAL
First digit:
S = simple
D = double
T = triple
Second digit:
configuration
1, 2, 3, 4, or 5
3
OHMIC VALUE
The first three digits
are significant
figures and the last
specifies the
number of zeros to
follow, R designates
decimal point.
4702 = 47 kΩ
47R0 = 47
Ω
In case of double or
triple value
→
value = sum of the 2
or 3 values
8
5
0
S
2
4
TOLERANCE
J=5%
K = 10 %
1
2
R
3
7
0
J
4
5
PACKAGING
B = box
B
5
6
6
INDUSTRIALIZATION
NUMBER
3 specific digits
(if applicable)
Revision: 08-Feb-2021
Document Number: 32573
5
For technical questions, contact:
mcbfixedresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
