C&H Technology RCH User Manual
6121 Baker Road,
Suite 108
Minnetonka, MN 55345
www.chtechnology.com
Phone (952) 933-6190
Fax (952) 933-6223
1-800-274-4284
Thank you for downloading this document from C&H Technology, Inc.
Please contact the C&H Technology team for the following questions -
Technical ● Application ● Assembly ● Availability ● Pricing
Phone – 1-800-274-4284
E-Mail – sales@chtechnology.com
www.chtechnology.com - SPECIALISTS IN POWER ELECTRONIC COMPONENTS AND ASSEMBLIES
-
www.chtechnology.com
RCH
Vishay Sfernice
Power Resistors, for Mounting onto a Heatsink
Thick Film Technology
Manufactured in cermet thick film technology, these power
resistors exhibit remarkable characteristics and the series
includes 4 types ranging from 5 W to 50 W.
Designed to be mounted onto a heatsink, the resistors can
bear high short time overloads and 3 types of terminations
are available.
The resistors are non inductive and are particularly suitable
for high frequency operation and cut-out circuits.
DIMENSIONS in millimeters
FEATURES
• 5 W to 50 W
• High power rating
• High overload capabilities up to 2500 V
• Wide resistance range from 0R24 to 1 MΩ
• High thermal capacity up to 0.8 °C/W
• Easy mounting
• Reduced size and weight
• High insulation: 10
6
MΩ
RMS
RCH...R
Ø 2
General tolerance: ± 0.3 mm
6
RCH...S
H
W
S
L
T
F
Ø D
6
3
Ø 2.1
4.8
P
6
9
RCH...V
M2
6
DIMENSIONS
MODEL RCH 5 RCH 10 RCH 25 RCH 50
L 16.6 19 28 47.8
W 9111415.5
H 16.4 20.6 27.5 29.4
P Leads Pitch 10.2 12.7 18.3 30.5
F Connections Pitch 11.3 14.3 18.3 39.7
T 12.5 15.9 19.8 21.4
S 5.3 5 7.7 8
Ø D 2.4 2.4 3.2 3.2
V Leads M2 M2 M3 M3
Weight (g) 4 5 7 12
www.vishay.com For technical questions, contact: sfer@vishay.com
1 Revision: 09-Jun-08
Document Number: 50006
RCH
Power Resistors, for Mounting onto a Heatsink
Vishay Sfernice
Thick Film Technology
MECHANICAL SPECIFICATIONS
Mechanical Protection Insulated case
Substrate Alumina
Resistive Element Cermet
Connections Tinned copper alloy
ENVIRONMENTAL SPECIFICATIONS
Temperature Range - 55 °C to + 125 °C
Climatic Category 55/125/56
PERFORMANCE
TESTS CONDITIONS TYPICAL DRIFTS
NF EN 140 000 CEI 115_1
Momentary Overload
Rapid Temperature Change
Load Life
Humidity (Steady State)
NF EN 140 000 125 °C CEI 68215 Test Na
NF EN 140 000 CEI 115_1
MIL STD 202 Method 103 B and C
2 P
< 2 UL
U
s
5 cycles
- 55 °C to + 125 °C
1000 h P
r
56 days RH 95 %
ELECTRICAL SPECIFICATIONS
Resistance Range
Standard Resistance Tolerances
Power Rating:
Chassis Mounted
Unmounted
Temperature Coeffi cient
Insulation Resistance
Total Inductance
/5 s
r
at + 25 °C
< ± (0.25 % + 0.05 Ω)
< ± (0.25 % + 0.05 Ω)
< ± (0.5 % + 0.05 Ω)
< ± (0.5 % + 0.05 Ω)
0.24 Ω to 1 MΩ E24 series
± 1 %, ± 2 %, ± 5 %, ± 10 %
± 150 ppm/°C (R > 1 Ω)
5 W to 50 W
2 W to 5.5 W
106 M
Ω
≤
0.1 µH
RESISTANCE VALUE IN RELATION TO TOLERANCE AND TCR
Resistance Value < 1 Ω > 1 Ω
Standard
Tolerances
Standard TCR ± 250 ppm/°C ± 150 ppm/°C
Tolerance on Request ± 1 % to ± 2 %
± 5 %
± 10 %
SPECIAL FEATURES
MODEL RCH 5 RCH 10 RCH 25 RCH 50
Power Rating-Chassis Mounted 5 W 10 W 25 W 50 W
Power Rating-Unmounted 2 W 2.5 W 4 W 5.5 W
Thermal Resistance R
Limiting Element Voltage (V
Max. Overload Voltage (V
Dielectric Strength (V
MIL STD 202 Method 301 10 mA Max.
Critical Resistance 5120 Ω 6250 Ω 12 100 Ω 33 024 Ω
Document Number: 50006 For technical questions, contact: sfer@vishay.com
Revision: 09-Jun-08 2
(j-c) 4.8 °C/W 3.2 °C/W 1.4 °C/W 0.8 °C/W
TH
) 160 V 250 V 550 V 1285 V
RMS
) 320 V 500 V 1100 V 2500 V
RMS
) 50 Hz, 1 Min
RMS
2000 V 2000 V 3500 V 3500 V
www.vishay.com
Loading...