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System Reliability Center
201 Mill Street
Rome, NY 13440-6916
888.722.8737
or 315.337.0900
Fax: 315.337.9932
Part Derating Parameters
Environment
Part Type
Capacitors
Fixed Aluminum
(Electrolytic)
Fixed Ceramic
Fixed Mica/Glass
Fixed Paper/Plastic
Fixed Tantalum (NonSolid)
Fixed Tantalum (Solid)
Variable Air
Circuit Breakers
General Purpose
Connectors
(All Types)
Derating Parameters
Severe
Benign
Voltage (% max rated)
Temperature (°C)
Voltage (% max rated)
Temperature (°C)
Voltage (% max rated)
Temperature (°C)
Voltage (% max rated)
Temperature (°C)
Voltage (% max rated)
Temperature (°C)
Reverse Voltage
Voltage (% max rated)
Temperature (°C)
Reverse Voltage
Voltage (% max rated)
Temperature (°C)
70%
Tmax - 20°C
60%
Tmax - 10°C
60%
Tmax - 10°C
60%
Tmax - 10°C
70%
Tmax - 20°C
2%
70%
Tmax - 20°C
2%
60%
Tmax - 10°C
80%
Tmax - 20°C
70%
Tmax - 10°C
70%
Tmax - 10°C
70%
Tmax - 10°C
80%
Tmax - 20°C
2%
80%
Tmax - 20°C
2%
70%
Tmax - 10°C
Current (% max rated)
80%
90%
Voltage
(% of Dielectric Withstand Voltage)
70%
80%
Current (% max rated)
70%
85%
Tmax - 50°C
Tmax - 25°C
13 dBm
18 dBm
90°C
10 dBm
13 dBm
90°C
90%
70%
95°C
90%
70%
95°C
90%
70%
95°C
90%
70%
95°C
90%
90%
95°C
90%
95°C
<100%
80%
115°C
<100%
80%
115°C
<100%
80%
115°C
<100%
80%
115°C
<100%
<100%
115°C
<100%
115°C
Insert Temperature Limit (°C)
Crystals
SAW
Diodes
General Purpose
(Signal/Switching)
Microwave
(Schottky/PIN)
Power Rectifier
Thyristor
Transient Voltage
Suppressor
Voltage Regulator/
Reference
Input Power from max (>500 MHz)
Input Power from max (<500 MHz)
Temperature (°C)
Forward Current (IF)
Reverse Voltage (VR)
Max Junction Temperature
Power Dissipation (PD)
Reverse Voltage (VR)
Max Junction Temperature
Forward Current (IF)
Reverse Current (VR)
Max Junction Temperature
On-State Current (IT)
Off-State Voltage (VR)
Max Junction Temperature
Power Dissipation (PD)
Average Current (IO)
Max Junction Temperature
Power Dissipation (PD)
Max Junction Temperature
(TJ)
(TJ)
(TJ)
(TJ)
(TJ)
(TJ)
1
System Reliability Center
201 Mill Street
Rome, NY 13440-6916
888.722.8737
or 315.337.0900
Fax: 315.337.9932
Part Derating Parameters (Cont'd)
Environment
Part Type
Electric Motors
General Purpose
Fans
General Purpose
Filters
Capacitor
Inductors
Fuzes
Hybrids
Thick Film Resistor
Thin Film Resistor
Chip Resistor
Chip Capacitors
General Purpose Diode
Microwave Diode
Bipolar Transistor
Field Effect Transistor
Hybrid Package
Lamps
Incandescent
Neon
Magnetics
Transformer (Audio)
Transformer (Power)
Transformer (Pulse)
Coil (RF)
Derating Parameters
Severe
Benign
Bearing Load (% max rated)
Temperature (°C)
75%
Tmax - 25°C
75%
Tmax - 25°C
Bearing Load (% max rated)
Temperature (°C)
75%
Tmax - 25°C
75%
Tmax - 25°C
Voltage (% max rated)
Temperature (°C)
Current DC (% max rated)
Temperature (°C)
Normal Response Current
(% max rated)
60%
Tmax - 10°C
90%
Tmax - 25°C
80%
70%
Tmax - 10°C
<100%
Tmax - 25°C
90%
Time Delay Current (% max rated)
50%
85%
Power Dissipation (PD)
Power Dissipation (PD)
Power Dissipation (PD)
Voltage (% max rated)
Forward Current (IF)
Reverse Voltage (VR)
Power Dissipation (PD)
Reverse Voltage (VR)
Power Dissipation (PD)
Voltage (VCE)
Power Dissipation (PD)
Breakdown Voltage
Max Junction Temperature (TJ)
50%
50%
50%
60%
90%
70%
70%
70%
70%
70%
<100%
80%
90%
70%
<100%
80%
90%
70%
<100%
80%
90%
90%
95°C
<100%
<100%
115°C
94%
<175°C
98%
<150°C
94%
<175°C
98%
<150°C
90%
90%
Tmax - 25°C
90%
90%
Tmax - 25°C
90%
90%
Tmax - 25°C
90%
90%
Tmax - 25°C
<100%
<100%
Tmax - 25°C
<100%
<100%
Tmax - 25°C
<100%
<100%
Tmax - 25°C
<100%
<100%
Tmax - 25°C
Voltage (% max rated)
Temperature (°C)
Current (% max rated)
Temperature (°C)
Current Surge (% max rated)
Voltage Surge (% max rated)
Hot Spot Temperature (°C)
Current Surge (% max rated)
Voltage Surge (% max rated)
Hot Spot Temperature (°C)
Current Surge (% max rated)
Voltage Surge (% max rated)
Hot Spot Temperature (°C)
Current (DC) (% max rated)
Voltage Surge (% max rated)
Hot Spot Temperature (°C)
2
System Reliability Center
201 Mill Street
Rome, NY 13440-6916
888.722.8737
or 315.337.0900
Fax: 315.337.9932
Part Derating Parameters (Cont'd)
Environment
Part Type
MEMS
(Micro-ElectroMechanical Systems)
Microcircuits
Silicon Digital
(MOS & Bipolar)
Silicon Linear
(MOS & Bipolar)
GaAs Digital
GaAs Linear
SiGe Digital
SiGe Linear
Optoelectronics
Injection Laser Diode
Light Emitting Diode
Photo Diode
Photo Transistor
Fiber Cable
Relays
General Purpose
Derating Parameters
Severe
Benign
2.0
2.0
40% - 50%
40% - 50%
Fanout
Frequency (% max rated)
Output Current
Max Junction Temperature (TJ)
Power Dissipation (PD)
Output Current
Max Junction Temperature (TJ)
Max Channel Temperature (TCH)
RF Input Power
Power Dissipation (PD)
Max Channel Temperature (TCH)
Max Channel Temperature (TCH)
Max Channel Temperature (TCH)
90%
90%
90%
95°C
90%
90%
95°C
105°C
90%
90%
105°C
95°C
95°C
<100%
<100%
<100%
115°C
<100%
<100%
115°C
125°C
<100%
<100%
125°C
115°C
115°C
Power Output (% max rated)
Max Junction Temperature (TJ)
Max Junction Temperature (TJ)
Max Junction Temperature (TJ)
Max Junction Temperature (TJ)
Bend Radius % min. Rating
Cable Tension % Rated Strength
Fiber Tension % Proof Test
50%
95°C
95°C
95°C
95°C
200%
50%
20%
75%
115°C
115°C
115°C
115°C
200%
50%
20%
Driving Frequency to Resonate
Frequency Ratio
Relative Humidity
Contact Current
(Continuous % max rated)
75%
75%
40%
20%
10%
Contact Power (% max rated)
Temperature (°C)
Resistors
Fixed Composition
Resistive Load
Capacitive Load
Inductive Load
Motor
Filament (Lamp)
50%
Tmax - 20°C
50%
Tmax - 30°C
50%
Tmax - 40°C
50%
Tmax - 10°C
50%
Tmax - 52°C
50%
Tmax - 32°C
Power Dissipation (PD)
Temperature (°C)
Fixed Film
Power Dissipation (PD)
Temperature (°C)
Fixed Wirewound
Power Dissipation (PD)
Temperature (°C)
Variable Non-Wirewound Power Dissipation (PD)
Temperature (°C)
Variable Wirewound
Power Dissipation (PD)
Temperature (°C)
3
90%
90%
75%
30%
20%
Resistive Load
Capacitive Load
Inductive Load
Motor
Filament (Lamp)
70%
Tmax - 20°C
70%
Tmax - 18°C
70%
Tmax - 24°C
70%
Tmax - 6°C
70%
Tmax - 31°C
70%
Tmax - 19°C
System Reliability Center
201 Mill Street
Rome, NY 13440-6916
888.722.8737
or 315.337.0900
Fax: 315.337.9932
Part Derating Parameters (Cont'd)
Environment
Part Type
Switches
General Purpose
Derating Parameters
Contact Current
(Continuous % max rated)
Severe
75%
75%
40%
20%
10%
Benign
Contact Power (% max rated)
Contract Current (Surge)
Resistive Load
Capacitive Load
Inductive Load
Motor
Filament (Lamp)
50%
80%
Power Dissipation (PD)
Temperature (°C)
50%
Tmax - 50°C
50%
Tmax - 50°C
90%
70%
95°C
<100%
80%
115°C
90%
90%
95°C
<100%
<100%
115°C
90%
105°C
<100%
125°C
90%
105°C
<100%
125°C
90%
105°C
<100%
125°C
90%
Tmax - 20°C
80%
50%
75%
Tmax - 20°C
90%
Tmax - 20°C
80%
50%
75%
Tmax - 20°C
90%
90%
75%
30%
20%
Resistive Load
Capacitive Load
Inductive Load
Motor
Filament (Lamp)
70%
80%
Thermistors
Transistors
Bipolar Junction
Field Effect Transistor
(Silicon)
Field Effect Transistor
(GaAs)
Hetro Junction Bipolar
Transistor (GaAs)
High Mobility Transistor
(GaAs)
Tubes
Cathode Ray
Microwave
Power Dissipation (PD)
Breakdown Voltage (VCE)
Max Junction Temperature (TJ)
Power Dissipation (PD)
Breakdown Voltage (VBR)
Max Junction Temperature (TJ)
Power Dissipation (PD)
Max Channel Temperature (TCH)
Power Dissipation (PD)
Max Channel Temperature (TCH)
Power Dissipation (PD)
Max Channel Temperature (TCH)
Power Output (% max rated)
Temperature (°C)
Power Output (% max rated)
Reflection Power (% max rated)
Duty Cycle
Temperature (°C)
Copyright  2001 IIT Research Institute. All rights reserved.
Source:
•
RAC Publication, D-RATE, Electronic Derating for Optimum Performance.
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