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

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

5

6

7

8

910

250

200

150

100

50

POWER IN W

LVR03

LVR01

Surface Temperature vs Power

LVR05

LVR10

20

40

60

80

100

RESISTANCE (

LVR05

400

300

200

100

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

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

± (0.1 % + 0.0005

Ω) ΔR

Insulation Resistance

MIL-STD-202 Method 302, 100 V

1000 M

Ω 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