3

Type BR Series Specifications

Dissipation Constant

BR11

• Still air at 77°F (25°C): 0.065 mW/°C

• Still water at 77°F (25°C): 0.33 mW/°C

BR14

• Still air at 77°F (25°C): 0.10 mW/°C

• Still water at 77°F (25°C): 0.50 mW/°C

BR16

• Still air at 77°F (25°C): 0.12 mW/°C

• Plunge into water: 0.60 mW/°C

BR23

• Still air at 77°F (25°C): 0.18 mW/°C

• Plunge into water: 0.9 mW/°

Power Rating (In Air)

BR11

• Maximum Power Rating: 0.007 W

• 100% Maximum Power To: 257°F (125°C)

• Derated to 0% at: 572°F (300°C)

BR14

• Maximum Power Rating: 0.015 W

• 100% Maximum Power To: 257°F (125°C)

• Derated to 0% at: 572°F (300°C)

BR16

• Maximum Power Rating: 0.015 W

• 100% Maximum Power To: 257°F (125°C)

• Derated to 0% at: 572°F (300°C)

BR23

• Maximum Power Rating: 0.020 W

• 100% Maximum Power To: 257°F (125°C)

• Derated to 0% at: 572°F (300°C)

Options

• Non-standard resistance tolerances

• Non-standard resistance values

• Specify reference temperature(s) if it is not 77°F (25°C)

• Mounting in special housings or enclosures

• Longer continuous leads

• Welded or soldered extension leads_specify lead

material, diameter, length, and insulation, if any.

• Solderable or weldable/solderable leads

• Leads can be pre-tinned or treated for improved

soldering

• Calibration_specify temperature(s)

• Interchangeable pairs or sets, R-vs-T curve matching;

specify temperature range(s) and tolerance(s)

• Special aging and conditioning for high reliability

applications

Type BR32/42/55

Thermal and Electrical Properties

The following lists the thermal and electrical properties for

all large ruggedized thermistors. All definitions and test

methods per MIL-PRF-23648.

Body Dimensions

BR32

• Nominal diameter: 0.032 in (0.81 mm)

• Maximum diameter: 0.033 in (0.84 mm)

• Maximum length: 0.084 in (2.1 mm)

BR42

• Nominal diameter: 0.042 in (1.16 mm)

• Maximum diameter: 0.046 in (1.2 mm)

• Maximum length: 0.095 in (2.4 mm)

BR55

• Nominal diameter: 0.055 in (1.41 mm)

• Maximum diameter: 0.060 in (1.5 mm)

• Maximum length: 0.120 in (3 mm)

Lead-Wires

BR32

• Nominal diameter: 0.003 in (0.08 mm)

• Maximum lead length: 0.312 in (7.9 mm)

• Lead material: platinum alloy

• Available cuts: “K” adjacent or “P” opposite

BR42

• Nominal diameter: 0.004 in (0.10 mm)

• Maximum lead length: 0.312 in (7.9 mm)

• Lead material: platinum alloy

• Available cuts: “K” adjacent or “P” opposite

BR55

• Nominal diameter: 0.004 in (0.10 mm)

• Maximum lead length: 0.312 in (7.9 mm)

• Lead material: platinum alloy

• Available cuts: “K” adjacent or “P” opposite

Thermal Time Constant

BR32

• Still air at 77°F (25°C): 4.5 second

• Plunge into water: 90 msec

BR42

• Still air at 77°F (25°C): 5 second

• Plunge into water: 140 msec

BR55

• Still air at 77°F (25°C): 7 second

• Plunge into water: 200 msec