G, GN
Vishay Dale
www.vishay.com
118 Document Number 30205
Revision 06-Apr-01
For technical questions, contact ww2bresistors@vishay.com
FEATURES
• From 1.4 to 4 times higher power ratings than conventional
resistors of equivalent size
• High temperature coating
• Complete welded construction
• Meets applicable requirements of MIL-PRF-26
• Available in non-inductive styles (type GN) with Aryton-
Perry winding for lowest reactive components
• Excellent stability in operation
Wirewound Resistors, Military, MIL-PRF-26 Qualified,
Type RW, Precision Power, Silicone Coated
ORDERING INFORMATION
G-3-80 10Ω1.0%
MODEL RESISTANCE TOLERANCE
Ω± %
PARAMETER UNIT G RESISTOR CHARACTERISTICS
Temperature Coefficient ppm/˚C ± 90 for below 1Ω, ± 50 for 1Ω to 9.9Ω, ± 20 for 10Ω and above
Dielectric Withstanding Voltage VAC 500 minimum for G-1-80 thru G-3-380, 1000 minimum for all others
Short Time Overload – 5 x rated power for 5 seconds for G-1-80 thru G-5C (Characteristic U),
10 x rated power for 5 seconds for G-10
Maximum Working Voltage V (P x R)1/2
Insulation Resistance Ω1000 Megohm minimum dry, 100 Megohm minimum after moisture test
Terminal Strength lb 5 minimum for G-1-80 thru G-3-380, 10 minimum for all others
Solderability – MIL-PRF-26 type - Meets requirements of ANSI J-STD-002
Non Mil type - Terminals are 60/40 electro tin plated to facilitate soldering
Operating Temperature Range °C Characteristic U = - 65/+ 250, Characteristic V = - 65/+ 350
Power Rating – Characteristic U - + 250°C max. hot spot temperature, ± 0.5% max. ∆R in 2000 hr. load life
Characteristic V - + 350°C max. hot spot temperature, ± 3.0% max. ∆R in 2000 hr. load life
TECHNICAL SPECIFICATIONS
STANDARD ELECTRICAL SPECIFICATIONS RESISTANCE RANGE
MIL. RANGE SHOWN IN BOLD FACE
*Vishay Dale G models have two power ratings, depending on operation temperature and stability requirements.
NOTE: Shaded area indicates most popular models.
MODEL MIL-PRF-26
Ω
UV ± 0.5%, ± 1%
TYPE ± 0.05% thru ± 5% ± 3% & ± 5% ± 0.05% ± 0.1% ± 0.25% ± 3%, ± 5% g
G-1-80 — 1.0 — 1.0 - 1k 0.499 - 1k 0.499 - 3.4k 0.1 - 3.4k 0.20
G-1-380 RW81 1.0 — — 0.499 - 1k 0.499 - 1k 0.1 - 1k 0.20
G-2 — 1.5 — 1.0 - 1.3k 0.499 - 1.3k 0.499 - 4.9k 0.1 - 4.9k 0.21
G-3-80 — 2.0 — 1.0 - 2.74k 0.499 - 2.74k 0.499 - 10.4k 0.1 - 10.4k 0.34
G-3-380 RW80 2.0 — — 0.499 - 2.74k 0.499 - 2.74k 0.1 - 2.74k 0.34
G-5 — 4.0 5.0 0.499 - 6.5k 0.499 - 6.5k 0.1 - 24.5k 0.1 - 24.5k 0.80
G-5C — 5.0 7.0 0.499 - 8.6k 0.499 - 8.6k 0.1 - 32.3k 0.1 - 32.3k 1.20
G-10 — 7.0 10.0 0.499 - 25.7k 0.499 - 25.7k 0.1 - 95.2k 0.1 - 95.2k 3.60
POWER RATING*
P25°C
W
WEIGHT
(Typical)
www.vishay.com
119
G, GN
Vishay Dale
Document Number 30205
Revision 06-Apr-01 For technical questions, contact ww2bresistors@vishay.com
DIMENSIONS
Wirewound Resistors, Military, MIL-PRF-26 Qualified,
Type RW, Precision Power, Silicone Coated
MODEL DIMENSIONS in inches [millimeters]
LL
1
CD
(Max.)**
G-1-80 0.250 ± 0.031 0.281 0.085 ± 0.020 0.020 ± 0.002
G-1-380 [6.35 ± 0.787] [7.14] [2.16 ± 0.508] [0.508 ± 0.051]
G-2 0.312 ± 0.016 0.328 0.078 + 0.016 - 0.031 0.020 ± 0.002
[7.92 ± 0.406] [8.33] [1.98 + 0.406 - 0.787] [0.508 ± 0.051]
G-3-80 0.406 ± 0.031 0.437 0.094 ± 0.031 0.020 ± 0.002
G-3-380 [10.31 ± 0.787] [11.10] [2.39 ± 0.787] [0.508 ± 0.051]
G-5 0.562 ± 0.062 0.622 0.188 ± 0.032 0.032 ± 0.002
[14.27 ± 1.57] [15.80] [4.78 ± 0.813] [0.813 ± 0.051]
G-5C 0.500 ± 0.062 0.593 0.218 ± 0.032 0.040 ± 0.002
[12.70 ± 1.57] [15.06] [5.54 ± 0.813] [1.02 ± 0.051]
G-10 0.875 ± 0.062 1.0 0.312 ± 0.032 0.040 ± 0.002
[22.23 ± 1.57] [25.4] [7.92 ± 0.813] [1.02 ± 0.051]
C
D
L
1.50
[38.10]*
Min.
L1
*On some standard reel pack methods, the leads may be trimmed to
a shorter length than shown.
**L1 (Max.) dimension is clean lead to clean lead.
MATERIAL SPECIFICATIONS
Element: Copper-nickel alloy or nickel-chrome alloy,
depending on resistance value
Core: Ceramic, Beryllium oxide or alumina, depending on
resistor model
Coating: Special high temperature silicone
Standard Terminals: Tinned Copperweld®
End Caps: Stainless steel
Part Marking: DALE, Model, Wattage*, Value, Tolerance,
Date Code
*Wattage marked on part will be "U" characteristic
PERFORMANCE
TEST CONDITIONS OF TEST TEST LIMITS
(CHARACTERISTIC U)
Thermal Shock Rated power applied until thermally stable, then a minimum of 15 minutes at - 55°C± (0.2% + 0.05Ω) ∆R
Short Time Overload 5 x power (G-1-80 thru G-5C), 10 x power (G-10) for 5 seconds ± (0.2% + 0.05Ω) ∆R
Dielectric Withstanding Voltage 1000V rms, one minute ± (0.1% + 0.05Ω) ∆R
Low Temperature Storage - 65°C for 24 hours ± (0.2% + 0.05Ω) ∆R
High Temperature Exposure 250 hours at + 250° (Characteristic U) ± (0.5% + 0.05Ω) ∆R
Moisture Resistance MIL-STD-202 Method 106, 7b not applicable ± (0.2% + 0.05Ω) ∆R
Shock, Specified Pulse MIL-STD-202 Method 213, 100g's for 6 milliseconds, 10 shocks ± (0.1% + 0.05Ω) ∆R
Vibration, High Frequency Frequency varied 10 to 2000Hz, 20g peak, 2 directions 6 hours each ± (0.1% + 0.05Ω) ∆R
Load Life 2000 hours at rated power, + 25°C, 1.5 hours “ON”, 0.5 hours “OFF” ± (0.5% + 0.05Ω) ∆R
Terminal Strength 5 to 10 sec., 5 or 10 lb pull test (depending on size), torsion test - 3 alternating directions, 360°C each ± (0.1% + 0.05Ω) ∆R
GN NON-INDUCTIVE
Models of equivalent physical and electrical specifications are
available with non-inductive (Aryton-Perry) winding. They are
identified by inserting the letter N after G in the model number
(GN-5, for example). Two conditions apply:
1. For GN models, divide maximum resistance values by two
2. Body O.D. on GN-5C may exceed that of the G-5C by 0.010"
TERMINATION
When G resistors will be operated at full rated power,
resistance welding or high temperature solder are the
recommended termination methods. Termination should be
made within 1/2 inch from end of resistor body.
Derating
120
100
80
60
40
20
0-65 -50 0 50 150 250 350
AMBIENT TEMPERATURE IN °C
RATED POWER IN %
CHAR. V
CHAR. U
25
