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KEY FEATURES:
  • Resistances from 0.005 to 250kOhms
  • Tolerance to ± 0.01%
  • High Temperature: - 55ºC to + 275ºC
  • Low TCR: ± 20ppm/ºC
  • Power Rating 5 to 300 Watts
  • Excellent Pulse Handling
  • Non-Inductive windings available
  • Four Terminal Versions Available (Call Factory)
  • RoHS Compliant
APPLICATIONS:
  • Motor Control
  • Braking Systems
  • Welding
  • X-Ray

Johanson Dielectric’s Resistor Wirewound Chasis Mount or RWC Series is designed for direct heatsink mounting with compound to give maximum performance in power applications for resistors. This robust series uses wirewound resistor technology in a large ceramic core molded into an extruded aluminum, chassis-mount housing. The wire wound design maximizes pulse handling capability, while the aluminum housing provides for superior heat conduction and resistance to very tough environmental conditions.

Resistor Wire wound Chasis Mount
PRODUCT SUMMARY:
PRODUCT SERIES (RWC) RESISTANCE RANGE (Ω) 1 POWER RATING (W @ 25ºC) DIELECTRIC STRENGTH TEMPERATURE COEFFICIENT TEMPERATURE RANGE
FREE
AIR
COMMERCIAL MIL
G10.01 to 22K4.5 7.5 a 5 a 1500 VAC
  • >10 Ω: ± 20ppm/ºC
  • 1 Ω to 10 Ω: ± 50ppm/ºC
  • <1Ω: Call Factory
-55°C to + 250°C
G2 0.01 to 47K7.5 12.5 a 10 a 1500 VAC
G3 0.01 to 90K12 25 b 20 b 2500 VAC
G4 0.01 to 250K20 50 c 30 c 3500 VAC
TOLERANCE: ± 0.01 to ± 10% (1% Standard)
1 For non-inductive windings, divide maximum resistance by 2
a Heatsink required: 0.040 [1.0] Aluminum Plate, 129 in2 [832 cm2] or equiv.
b Heatsink required: 0.040 [1.0] Aluminum Plate, 167 in2 [1077 cm2] or equiv.
c Heatsink required: 0.059 [1.5] Aluminum Plate, 291 in2 [1877 cm2] or equiv.
d Heatsink required: 0.125 [3.2] Aluminum Plate, 294in2 [1896cm2] or equiv.
e Heatsink required: 0.125 [3.2] Aluminum Plate, 895 in2 [5780 cm2] or equiv.
Mechanical Characteristics
RWC Mechanical Characteristics and Dimensions

 

Package Code G1 G2 G3 G4
Dimensions
Inches [mm]
A (Tolerances)
±0.005 [±0.13 mm]
0.444 [11.28] 0.562 [14.27] 0.719 [18.26] 1.563 [39.70]
B (Tolerances)
±0.005 [±0.13 mm]
0.490 [12.45] 0.625 [15.88] 0.781 [19.84] 0.844 [21.44]
C (Tolerances)
±0.031 [±0.79 mm]
0.600 [15.24] 0.750 [19.05] 1.062 [26.97] 1.968 [49.99]
D (Tolerances)
±0.062 [±1.57 mm]
1.125 [28.58] 1.320 [33.53] 1.870 [47.50] 2.760 [70.10]
E (Tolerances)
±0.015 [±0.38 mm]
0.334 [8.48] 0.430 [10.92] 0.530 [13.46] 0.615 [15.62]
F (Tolerances)
±0.015 [±0.38 mm]
0.646 [16.41] 0.800 [20.32] 1.080 [27.43] 1.140 [28.96]
G (Tolerances)
±0.015 [±0.38 mm]
0.320 [8.13] 0.400 [10.16] 0.560 [14.22] 0.615 [15.62]
H (Tolerances)
±0.010 [±0.25 mm]
0.065 [1.65] 0.075 [1.91] 0.085 [2.16] 0.085 [2.16]
J (Tolerances)
±0.010 [±0.25 mm]
0.140 [3.56] 0.190 [4.83] 0.260 [6.60] 0.300 [7.62]
K (Tolerances)
±0.010 [±0.25 mm]
0.078 [1.98] 0.093 [2.36] 0.172 [4.37] 0.196 [4.98]
L (Tolerances)
±0.005 [±0.13 mm]
0.093 [2.36] 0.093 [2.36] 0.125 [3.18] 0.125 [3.18]
M (Tolerances)
±0.015 [±0.38 mm]
0.078 [1.98] 0.102 [2.60] 0.125 [3.18] 0.125 [3.18]
N (Tolerances)
±0.006 [±0.15 mm]
0.050 [1.27] 0.080 [2.03] 0.080 [2.03] 0.080 [2.03]
O (Tolerances)
±0.062 [±1.57 mm]
0.266 [6.76] 0.312 [7.93] 0.438 [11.13] 0.438 [11.13]
P (Tolerances)
±0.031 [±0.79 mm]
0.245 [6.22] 0.312 [7.92] 0.391 [9.93] 0.422 [10.72]
Q (Tolerances)
±0.002 [±0.05 mm]
0.051 [1.30] 0.098 [2.49] 0.098 [2.49] 0.098 [2.49]
R (Tolerances)
±0.031 [±0.79 mm]
0.085 [2.16] 0.160 [4.06] 0.185 [4.70] 0.185 [4.70]
MIL-R-39009 / MIL-R-18546 RER-60 / RE-60 RER-65 / RE-65 RER-70 / RE-70 RER-75 / RE-75
Environmental Performance
Environmental Performance
(MIL-STD 202)
tringle symbolR
Vibration ±0.1 % + 0.05 Ω
Load Life ± 1% + 0.05 Ω
Moisture Resistance ±0.2 % + 0.05 Ω
Dielectric ±0.2 % + 0.05 Ω
Storage ±0.2 % + 0.05 Ω
Shock ±0.1 % + 0.05 Ω
Thermal Shock ±0.2 % + 0.05 Ω
5X Overload (5s) ±0.2 % + 0.05 Ω
CONSTRUCTION NOTES:
  • Centerless ground ceramic core
  • Tinned copper or copperweld leads
  • All welded terminations
  • High Temperature epoxy molding compound
  • Anodized aluminum housing

* Moisture Sensitivity Level: MSL-1

RWC Power Derating Curve chart
Available Options (Consult Factory)
  • Special Testing Requirements
  • Special Pulse Requirements
How to Order RWC Series Part Number Breakdown

This datasheet is subject to change without notice.