Selection Guide Conversion Carbon Composition Resistors Vishay Da
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Vishay Dale
Selection Guide Conversion Carbon Composition Resistors
Vishay Dale believes that information described this publication accurate reliable, much care been taken preparation. However, responsibility, financial otherwise, accepted consequences arising this information. This information subject change without notice.
Document Number 31049 Revision 20-Jul-01
Technical Questions, contact: ff2aresistors@vishay.com
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Vishay Dale
Carbon Composition Cross Reference
following cross reference guide intended assist finding Vishay Dale film resistor types that most similar particular Allen-Bradley carbon composition type. Direct interchangeability implied differences technology, however, electrical characteristics typically will exceeded.
CROSS-REFERENCE COMMERCIAL MODELS
CHARACTERISTICS WATTAGE Watt Model Body Length Body Diameter Lead Diameter Resistance Range (Ohms) Maximum Operating Voltage ALLEN BRADLEY (Carbon Comp) GENERAL APPLICATIONS SNUBBER EXTENDED RANGE
.145" .062" .015" 100M
CMF-50 .150" .065" .016"
RS-1/4 .250" .085" .020" 3.4k
RNX-1/4 .290" .140" .025" 100M
Watt Model Body Length Body Diameter Lead Diameter Resistance Range (Ohms) Maximum Operating Voltage Watt Model Body Length Body Diameter Lead Diameter Resistance Range (Ohms) Extended Range Maximum Operating Voltage 1Watt Model Body Length Body Diameter Lead Diameter Resistance Range (Ohms) Maximum Operating Voltage
.250" .090" .025" 100M
CMF-55 .240" .090" .025" 22.1M
RS-1/4 .250" .085" .020" 3.4k
RNX-1/4 .290" .140" .025" 100M
.375" .140" .033" 100M
CMF-20 .375" .145" .032" 8.2M
1/2P .360" .138" .032"
RS-1/2 .312" .085" .020" 4.9k
RNX-3/8 .420" .140" .025" 1.5kV
.562" .225" .041" 100M
FP-69P .516" .225" .032" 1.5M
RS-2B .562" .187" .032" 34.5k
RNX-3/4 .790" .140" .025"
Watt Model Body Length Body Diameter Lead Diameter Resistance Range (Ohms) Maximum Operating Voltage
.688" .312" .045" 100M 500/750
FP2P .687" .300" .045" 1.5M
RS-2C .500" .218" .040" 32.3k
R0X-3/4 .800" .310" .032"
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Technical Questions, contact: ff2aresistors@vishay.com
Document Number 31049 Revision 20-Jul-01
Carbon Composition Cross Reference
Vishay Dale
following cross reference guide intended assist finding Vishay Dale film resistor types that most similar particular Allen-Bradley carbon composition type. Direct interchangeability implied differences technology, however, electrical characteristics typically will exceeded. Military types also listed reference: MIL-R-11 (RC), MIL-R-22684 (RL) MIL-R-10509 (RN).
CROSS-REFERENCE BASIC MILITARY MODELS
CHARACTERISTICS WATTAGE Watt Model Body Length Body Diameter Lead Diameter Resistance Range (Ohms) Maximum Operating Voltage ALLEN BRADLEY (Carbon Comp) SUGGESTED VISHAY DALE MODELS (Film Resistor Types)
RC05 .145" .062" .015" 100M
RN50 .150" .065" .016"
Watt Model Body Length Body Diameter Lead Diameter Resistance Range (Ohms) Maximum Operating Voltage
RC07 .250" .090" .025" 100M
RN55 .240" .090" .025" 22.1M 250/200
RL07 .240" .090" .025"
Watt Model Body Length Body Diameter Lead Diameter Resistance Range (Ohms) Maximum Operating Voltage
RC20 .375" .140" .033" 100M
RN60 .344" .145" .025" 350/200
RL20 .375" .145" .032"
Watt Model Body Length Body Diameter Lead Diameter Resistance Range (Ohms) Maximum Operating Voltage
RC32 .562" .225" .041" 100M
RN70 .562" .180" .032"
Watt Model Body Length Body Diameter Lead Diameter Resistance Range (Ohms) Maximum Operating Voltage
RC42 .688" .312" .045" 100M 500/750
(SEE COMMERCIAL OFFERINGS)
Document Number 31049 Revision 20-Jul-01
Technical Questions, contact: ff2aresistors@vishay.com
www.vishay.com
Vishay Dale
Carbon Composition Cross Reference
following cross reference guide intended assist finding Vishay Dale film resistor types that most similar particular Allen-Bradley carbon composition type. Direct interchangeability implied differences technology, however, electrical characteristics typically will exceeded. Military types also listed reference: MIL-R-11 (RC), MIL-R-22684 (RL), MIL-R-39008 (RCR) MIL-R-39017 (RLR).
CROSS-REFERENCE ESTABLISHED RELIABILITY MODELS
CHARACTERISTICS WATTAGE Watt Model Body Length Body Diameter Lead Diameter Resistance Range (Ohms) Maximum Operating Voltage Watt Model Body Length Body Diameter Lead Diameter Resistance Range (Ohms) Maximum Operating Voltage ALLEN BRADLEY (Carbon Comp) GENERAL APPLICATIONS SNUBBER
RCR05 .145" .062" .015" 100M
RLR05 .150" .066" .016" (1.1M QPL)
RWR81S .250" .085" .020"
RCR07 .250" .090" .025" 100M
RLR07 .250" .090" .025"
RWR81S .250" .055" .020"
Watt Model Body Length Body Diameter Lead Diameter Resistance Range (Ohms) Maximum Operating Voltage Watt Model Body Length Body Diameter Lead Diameter Resistance Range (Ohms) Maximum Operating Voltage Watt Model Body Length Body Diameter Lead Diameter Resistance Range (Ohms) Maximum Operating Voltage
RCR20 .375" .140" .033" 100M
RLR20 .375" .138" .032" 3.01M
RWR82S .312" .085" .020" 1.3k
RCR32 .562" .225" .041" 100M
RLR32 .560" .190" .040" QPL)
RWR89S .562" .187" .032" 4.12k
RCR42 .688" .312" .045" 100M 500/750
PARTS FP2P, 1.5M ERL-62-1, 2.7M
RWR89S .562" .187" .032" 4.12k
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Technical Questions, contact: ff2aresistors@vishay.com
Document Number 31049 Revision 20-Jul-01
Carbon Composition Cross Reference
Vishay Dale
COMPARISON SPECIFICATIONS
MODELS MILL SPECIFICATION MIL-R-39017 MIL-R-39008
GENERAL CHARACTERISTICS
Type Element Film element insulating form Carbon Composition (hot molded solid core material applied thin coating insulating form)
Available Tolerances
values decade values decade
values decade
Mil-Spec Test Criteria Failure Rate Determination 70°C) Resistance Temperature Characteristics (Maximum
100% rated power 10,000 hrs. permissible rated power 10,000 hrs. Permissible change resistance change resistance 15%.
100PPM/°C (350PPM/°C, Above 10M) Equivalent
Below Above -55°C 0.8% 2.8%
±150°C
1.25% 4.375%
under 1.1k 100k 110k above
-55°C 6.5%
±105°C
7.5%
ENVIRONMENTAL TESTS (STABILITY)
Life (+70%) 2000 hrs. 100% rated power: 1000 hrs. 100% rated power: average individual resistor. 1000 hrs. rated power: (Test required)
Dielectric Strength High Temp. Exposure 150°C 2000 Hrs) Temp. Operation Moisture Resistance Short Time Overload Terminal Strength Resistance Solder Heat Shock vibration
Power Conditioning (100% Test) Thermal Shock
0.5% 0.25% 0.25% 0.25% 0.5% 0.25% 0.25% 0.5%
delta requirement (Test required)
average individual resistor 2.5%
ADVANTAGES DISADVANTAGES
STYLE: CARBON COMPOSITION Advantages Wide resistance range Good stability rate power Good pulse handling capability Good frequency characteristics Disadvantages Highest Poor moisture resistance Poor shelf life (15%) High noise level High voltage coefficient (.02 .0.5%) Becoming obsolete Very high A.S.P. STYLE: METAL FILM/METAL OXIDE Advantages Better stability full power Better operating temperature (150°C 175°C) Excellent shelf life (0.1%) Good frequency characteristics Good voltage coefficient (.001%/V) Best shelf availability Disadvantages Limited resistance range some styles)
NOTE: Each board application unique design parameters. wish request samples, insure compatibility with your specific application, prototype qualification builds.
Document Number 31049 Revision 20-Jul-01
Technical Questions, contact: ff2aresistors@vishay.com
www.vishay.com
Vishay Dale
Carbon Composition Cross Reference
VISHAY DALE NICHROME FILM RESISTORS PULSED POWER APPLICATIONS
various military specifications which provide framework construction testing Established Reliability film resistors supply detailed requirements performance these components wide range operating environments. They not, however, provide much guidance area pulsed power applications. become very evident from numerous questions receive that film resistors subjected wide variety electrical pulses which short duration relatively high amplitude. answer these questions, Vishay Dale Film Division performed extensive testing develop guidelines resistors short duration current pulse applications. product lines Vishay Dale equivalent styles respectively. recommendations presented here shall apply only Vishay Dale styles applicable other products. Numerous factors influence response single resistor given pulsed overload these guidelines based most conservative analysis test results from thousands individual units. Single Square Pulse: following graphs depict maximum recommended instantaneous power amplitudes Vishay Dale RLR05, RNC50, RLR07 RNC55 products single square wave form pulse. Each graph provides maximum power resistor will withstand without resistance change, maximum power when allowing 0.2% resistance change single applied pulse.
MAXIMUM PULSE AMPLITUDE
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Technical Questions, contact: ff2aresistors@vishay.com
Document Number 31049 Revision 20-Jul-01
Carbon Composition Cross Reference
Vishay Dale
VISHAY DALE NICHROME FILM RESISTORS PULSED POWER APPLICATIONS
Repetitive Pulses: change induced single overload pulse expected have similar cumulative effects with successive pulses. this reason, Vishay Dale recommends that application with repetitive pulses limit pulse power value which results resistance change. Additionally, necessary verify that average power during five second period operation does exceed power rating component. Capacitor Discharge: case where pulse exhibits exponential decay typical discharge capacitor, suitability resistor determined calculating equivalent square wave pulse. determining resistor's tolerance short duration exponentially decaying power overload, square wave with amplitude equal initial voltage that pulse with duration equal one-half time constant decaying pulse will equivalent energy substituted. time constant time required voltage across capacitor have decreased 36.8% it's value moment discharge began. Because power proportional square voltage, power will have decayed 13.5% it's original value same time. graph right depicts power output discharging capacitor equivalent square pulse. time constant capacitive discharge calculated multiplying capacitance Farads resistive load Ohms through which capacitor discharged. Maximum Voltage Constraints: addition previous limitations which imposed properties resistive film, characteristics dielectric materials insulating resistive elements must also recognized. four Vishay Dale styles mentioned above, potential across component exceed 3000 volts without risk dielectric failure insulating coating. half this value will provide proper duration equivalent pulse. Equivalent pulse duration Resistive (Ohms) Capacitance (Farads)
Additional Information: While recommendations presented here very broad, likely that there applications which ones have provided. need additional information have questions this subject, please email contact bottom this datasheet
Document Number 31049 Revision 20-Jul-01
Technical Questions, contact: ff2aresistors@vishay.com
www.vishay.com
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