NTC THERMISTORS: TYPE BR11/14/16/23 GLASS ENCAPSULATED BEAD THERMISTOR DESCRIPTION: Small glass encapsulated bead thermistors on fine diameter alloy lead-wires. FEATURES: Suitable for most low cost temperature measure- ment, control or compensation applications Very fast thermal response times Rugged glass encapsulation provides hermetic seal and better strain relief than small glass coated bead thermistors Long term stability is better than small glass coated bead thermistors. DIMENSIONS: Suitable for self-heated applications such as liquid level sensing or gas flow measurement Recommended for all applications where the customer will perform further assembly operations Normal operating/storage temperatures range from -80C to: 105C for Material system E0 200C for Material systems A1 through A4 300C for Material systems A5 through D17 Unaffected by severe environmental exposures, including nuclear radiation. Intermittent operation to 600C is permissible, however, stability will be degraded. OPTIONS: Non-standard resistance tolerances Non-standard resistance values Reference temperature(s) other than 25C - specify 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 CODING: The code number to be ordered may be specified as follows: BR 16 K A 223 N Tolerance code letter (see NOTE 1 and TABLE B) Zero-power resistance as 25C (see NOTE 2) Material System Code Letter (see TABLE A) Lead configuration code letter. K = adjacent leads with stub ends glass coated P = opposite leads Nominal Bead Diameter in mils (specify 11, 14, 16 or 23) Style BR denotes RUGGEDIZED BEAD structure NOTE 1: Special tolerances are available upon request. Consult factory for special resistance tolerances, non-standard resistances and/or non-standard temperatures. NOTE 2: The zero-power resistance at 25C, expressed in Ohms, is identified by a three digit code number. The first two digits represent significant figures, and the last digit specifies the number of zeros to follow. Example: 22k Ohms= 223. The standard resistance values are from the 24-Value series decade as specified in Military Standard MS90178. 1.0 / 1.1 / 1.2 / 1.3 / 1.5 / 1.6 / 1.8 / 2.0 / 2.2 / 2.4 / 2.7 / 3.0 3.3 / 3.6 / 3.9 / 4.3 / 4.7 / 5.1 / 5.6 / 6.2 / 6.8 / 7.5 / 8.2 / 9.1TABLE A: THERMAL AND ELECTRICAL PROPERTIES: The following table lists the THERMAL and ELECTRICAL properties for all SMALL RUGGEDIZED THERMISTORS. All definitions and test methods are per MIL-PRF-23648. THERMISTOR SERIES: BR11 BR14 BR16 BR23 BODY DIMENSIONS: Nom. Diameter: .011 (.28 mm) .014 (.36 mm) .016 (.41 mm) .023 (.58 mm) Max. Diameter: .012 (.30 mm) .016 (.41 mm) .017 (.43 mm) .025 (.63 mm) Max. Length: .024 (.61 mm) .032 (.81 mm) .034 (.86 mm) .056 (1.4 mm) lead-wires: Nom. Diameter: .0007 (.02 mm) .0011 (.03 mm) .0011 (.03 mm) .002 (.05 mm) Minimum Lead Length: .312 (7.9 mm) .312 (7.9 mm) .312 (7.9 mm) .312 (7.9 mm) Lead Material: Platinum Alloy Platinum Alloy Platinum Alloy Platinum Alloy Available Cuts: K adjacent K adjacent K adjacent K adjacent P oppositeP oppositeP oppositeP opposite MATERIAL SYSTEM: Nominal Nominal Nominal Nominal CODE R-vs-T 25/125 Resistance Resistance Resistance Resistance LETTER CURVE RATIO Range 25C Range 25C Range 25C Range 25C E 0 5.0 A 1 11.8 1.0 k 1.5 k 300 680 300 680 300 680 A 2 12.5 1.5 k 3.6 k 680 1.6 680 1.6 680 1.6 A 3 14.0 3.6 k 7.5 k 1.6 k 3.6 k 1.6 k 3.6 k 1.6 k 3.6 k A 4 16.9 7.5 k 15 k 3.6 k 6.8 k 3.6 k 6.8 k 3.6 k 6.8 k A 5 19.8 15 k 51 k 6.8 k 27 k 6.8 k 27 k 6.8 V 27 k A 6 22.1 A 7 22.7 51 k 150 k 27 k 75 k 27 k 75 k 27 k 75 k B 8 29.4 150 k 270 k 75 k 130 k 75 k 130 k 75 k 130 k B 9 30.8 270 k 470 k 130 k 240 k 130 k 240 k 130 k 240 k B 10 32.3 470 k 750 k 240 k 360 k 240 k 360 k 240 k 360 k B 11 35.7 750 k 1.6 M 360 k 820 k 360 k 820 k 360 k 820 k B 12 38.1 1.6 M 2.7 M 820 k 1.3 M 820 k 1.3 M 820 k 1.3 M B 13 45.0 2.7 M 6.8 M 1.3 M 3.3 M 1.3 M 3.3 M 1.3 M 3.3 M B 14 48.1 6.8 M 10 M 3.3 M 6.8 M 3.3 M 6.8 M 3.3 M 6.8 M B 15 56.5 6.8 M 10 M 6.8 M 10 M 6.8 M 10 M D 16 75.6 D 17 81.0 THERMAL TIME CONSTANT: Still Air at 25C: 0.8 sec 1.0 sec 1.2 sec 1.7 sec Plunge into Water: 12 msec 14 msec 16 msec 40 msec DISSIPATION CONSTANT: Still Air at 25C: .065 mW/C .10 mW/C .12 mW/C .18 mw/C Still Water at 25C: .33 mW/C .50 mW/C .60 mW/C .90 mW/C POWER RATING: (in air) Maximum Power Rating: .007 Watts .015 Watts .015 Watts .020 Watts 100% Max. Power to: 125C 125C 125C 125C Derated to 0% at: 300C 300C 300C 300C RESISTANCE -VS- TEMPERATURE CHARACTERISTICS: The nominal resistance range for the zero-power resistance at 25C is shown for each THERMISTOR Type and each available Material System. Each Material System is denoted by an ordering Code Letter, a referenced Curve number and the nominal 25C/125C resistance ratio. TABLE B: STANDARD TOLERANCES: Tolerance Code Letter F G J K L M N P Q R S % Tolerance at 25C 1 2 5 10 15 20 25 30 40 50 Non-standard consult factory BOWTHORPE THERMOMETRICS THERMOMETRICS, INC. KEYSTONE THERMOMETRICS CORPORATION Crown Industrial Estate, Priorswood Road 808 US Highway 1 967 Windfall Road Taunton, Somerset TA2 8QY UK Edison, New Jersey 08817-4695 USA St. Marys, Pennsylvania 15857-3397 USA Tel +44 (0) 1823 335200 Tel +1 (732) 287 2870 Tel +1 (814) 834 9140 Fax +44 (0) 1823 332637 Fax +1 (732) 287 8847 Fax +1 (814) 781 7969