LVR
Wirewound Resistors, Precision Power, Low Value,
Commercial, Military, MIL-PRF-49465 Type RLV, Axial Lead
Vishay Dale
Document Number: 30206 For technical questions, contact: ww2aresistors@vishay.com
www.vishay.com
Revision: 29-Feb-08 153
DIMENSIONS in inches [millimeters]
Note
(1)
On some standard reel pack methods, the leads may be trimmed to a shorter length than shown
MATERIAL SPECIFICATIONS
Element: Self-supporting nickel-chrome alloy
(LVR10 also utilizes manganin)
Encapsulation: High temperature mold compound
Terminals: Tinned copper
Part Marking: DALE, model, wattage, value, tolerance,
date code
The improved TCR characteristics of these LVR models from
- 55 °C to + 125 °C (reference to + 25 °C) are as follows:
1.50 [38.10]
(1)
minimum
A
C
B
MODEL
DIMENSIONS in inches [millimeters]
A
± 0.010 [0.254]
B
± 0.010 [0.254]
C
± 0.002 [0.051]
LVR01 0.427 [10.85] 0.115 [2.92] 0.020 [0.508]
LVR03 0.560 [14.22] 0.205 [5.21] 0.032 [0.813]
LVR05 0.925 [23.50] 0.330 [8.38] 0.040 [1.02]
LVR10 1.828 [46.43] 0.392 [9.96] 0.040 [1.02]
12 3 4 567 8 910
250
200
150
100
50
NI ERUTAREPMET ECAFRUS
°
C
POWER IN W
LVR03
LVR01
Surface Temperature vs Power
LVR05
LVR10
20 40 60 80 100
RESISTANCE (Ω x 10
-3
)
LVR05
400
300
200
100
TCR IN ppm/°C
LVR03
LVR01
TCR vs. Resistance Value
LVR10
- 65 - 25
25
75 125 175 225 275
AMBIENT TEMPERATURE IN °C
120
100
80
60
40
20
0
% N I R E W O P D
E
T A R
LVR01
LVR03
LVR05
LVR10
Derating
PERFORMANCE
TEST CONDITIONS OF TEST TEST LIMITS
Thermal Shock - 65 °C to + 125 °C, 5 cycles, 15 min at each extrem ± (0.2 % + 0.0005 Ω) ΔR
Short Time Overload 5 x rated power (LVR01, 03, 05), 10 x rated power (LVR10) for 5 s ± (0.5 % + 0.0005 Ω) ΔR
Low Temperature Storage - 65 °C for 24 h ± (0.2 % + 0.0005 Ω) ΔR
High Temperature Exposure 250 h at + 275 °C (+ 175 °C for LVR01) ± (2.0 % + 0.0005 Ω) ΔR
Dielectric Withstanding Voltage 1000 V
rms
, 1 min ± (0.1 % + 0.0005 Ω) ΔR
Insulation Resistance MIL-STD-202 Method 302, 100 V 1000 MΩ minimum
Moisture Resistance MIL-STD-202 Method 106, 100 7b not applicable ± (0.2 % + 0.0005 Ω) ΔR
Shock, Specified Pulse MIL-STD-202 Method 213, 100 g's for 6 ms, 10 shocks ± (0.1 % + 0.0005 Ω) ΔR
Vibration, High Frequency Frequency varied 10 to 2000 Hz, 20 g peak, 2 directions 6 h each ± (0.1 % + 0.0005 Ω) ΔR
Load Life 2000 h at rated power, + 25 °C, 1.5 h “ON”, 0.5 h “OFF” ± (2.0 % + 0.0005 Ω) ΔR
Solderability ANSI J-STD-002 95 % coverage
Bias Humidity + 85 °C, 85 % RH, 10 % bias, 1000 h ± (1.0 % + 0.0005 Ω) ΔR
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