NTC Leadless Disc Thermistors This type of product is widely used in automotive and consumer applications. They are assembled in custom-probes for sensing the temperature of liquids (water, oil, ...), gases or surface of any other component. The metallization covers completely the surfaces of the thermistor. The particularly flat and smooth surfaces ensure an excellent electrical and thermal contact under pressure. Types NR Metallization Physical data (dim. in mm) D Marking E On package only / On parts upon request Operating temperature -40°C to +200°C Custom - designed products defined with: D ± ΔD R1 ± ΔR1/R1 at T1 E ± ΔE R2 ± ΔR2/R2 at T2, . . . Values and tolerances DESIGN OF THE THERMISTOR Choice of the resistances Choice of the tolerances If the application is to measure the temperature around a defined point, a unique nominal resistance can be chosen (for example, among standard values of the ND range products presented on pages 20 to 24). When it is required to measure the temperature over selected ranges T1 –T2 , T2 –T3 , ..., the corresponding resistance R1 , R2 , R3 , ..., must be such that they can be located on the R (T) characteristic of an existing NTC material (for example among standard materials whose R (T) are displayed on pages 29 to 33). The resistances must also be compatible with the resistivity of the material and the dimensions of the thermistor. The precision of the temperature measurement determines the calculation of the tolerance on the resistance: ⌬R/R = ␣ (%/°C). ⌬T (°C) For example, the NTC NR55--3049-99, using “N5” material (R (T) characteristic displayed on page 31), requires a precision of 1°C over the temperature range 110°C - 120°C. The tolerances can be calculated: ⌬R110°C /R110°C = 1°C* 2.91%/°C = 2.91% ⌬R120°C /R120°C = 1°C* 2.76%/°C = 2.76% *For your specific requirements, please consult us. HOW TO ORDER NR55 - - 3002 - 99 Type P/N Code 27 NTC Leadless Disc Thermistors We present below some examples of our custom - designed products as an illustration of the different ways to define products. DIMENSIONS: millimeters (inches) B (k) R1 ± ⌬R1 at T1 T1 (°C) R2 ± ⌬R2 at T2 D E Material Code NR 55 -- 3002 - 99 5.5 (.217) ± 0.5 (.020) 1.1 (.043) ± 0.4 (.016) N5 4160 1230 Ω ± 7.5% 40 160 Ω ± 5% NR 67 -- 3068 - 99 6.7 (.264) ± 0.5 (.020) 1.7 (.067) ± 0.3 (.012) N 4080 150 Ω ± 3.3% 100 51 Ω ± 5.3% NR 55 -- 3049 - 99 5.5 (.217) ± 0.5 (.020) 1.0 (.040) ± 0.2 (.008) N5 4160 107 Ω ± 2.9% NR 55 -- 3046 - 99 5.5 (.217) ± 0.5 (.020) 1.3 (.051) ± 0.4 (.016) S 4520 48600 Ω± 7.5% NR 49 -- 3119 - 99 4.9 (.193) ± 0.3 (.012) 1.5 (.060) ± 0.4 (.016) M 3950 NR 55 -- 3114 - 99 5.5 (.217) ± 0.4 (.016) 1.0 (.040) ± 0.2 (.008) P 4220 5000 Ω ± 10% NR 70 -- 3121 - 99 7.0 (.275) ± 0.3 (.012) 1.2 (.047) ± 0.2 (.008) L 3790 NR 29 -- 3107 - 99 2.9 (.014) ± 0.3 (.012) 1.7 (.067) ± 0.3 (.012) K NR 55 -- 3122 - 99 5.5 (.217) ± 0.5 (.020) 1.5 (.060) ± 0.4 (.016) J NR 55 -- 3126 - 99 5.5 (.217) ± 0.5 (.020) 1.0 (.040) ± 0.2 (.008) P NR 47 -- 3116 - 99 4.7 (.185) ± 0.4 (.016) 1.2 (.047) ± 0.2 (.008) R NR 49 -- 3113 - 99 4.9 (.193) ± 0.3 (.012) 1.2 (.047) ± 0.2 (.008) N NR 47 -- 3101 - 99 4.6 (.181) ± 0.3 (.012) 1.4 (.055) ± 0.3 (.012) J NR 55 -- 3071 - 99 5.8 (.228) ± 0.3 (.012) 1.0 (.040) ± 0.2 (.008) NR 61 -- 3063 - 99 6.1 (.240) ± 0.3 (.012) NR 67 -- 3053 - 99 NR 50 -- 3048 - 99 Types T2 (°C) R3 ± ⌬R3 at T3 96.5 T3 (°C) – – 140 – – 80.6 Ω ± 2.8% 120 – – 3210 Ω ± 5% 90 – – 84 Ω ± 5% 104.4 – – 25 – – – – 210 Ω ± 10% 40 40 Ω ± 7.5% 90 30 Ω ± 6.7% 100 3630 2050 Ω ± 6% 25 193 Ω ± 5.4% 96.5 – – 3480 210 Ω ± 5% 25 – – – – 4220 3340 Ω ± 10% 25 264 Ω ± 7% 90 107 Ω ± 7% 120 4400 33000 Ω ± 2% 25 – – – – 4080 1680 Ω ± 10% 40 382 Ω ± 6.7% 80 176 Ω ± 5% 105 3480 146 Ω ± 13% 40 22 Ω ± 10% 100 – – L 3790 262 Ω ± 8.7% 40 120 Ω ± 10% 60 35.5 Ω ± 7.8% 100 1.5 (.060) ± 0.3 (.012) N 4080 760 Ω ± 9.2% 50 130 Ω ± 8.5% 100 56.6 Ω ± 8.5% 130 6.7 (.264) ± 0.4 (.016) 1.7 (.067) ± 0.3 (.012) N 4080 540 Ω ± 11% 60 144 Ω ± 7% 100 – – 5.0 (.197) ± 0.5 (.020) 1.5 (.060) ± 0.5 (.020) J 3480 233 Ω ± 10% 25 13.3 Ω ± 7% 121 – – NR 60 -- 3021 - 99 6.0 (.236) ± 0.5 (.020) 3.2 (.125) ± 0.3 (.012) P 4220 3640 Ω ± 3% 40 457 Ω ± 3% 96.5 – – NR 55 -- 3016 - 99 5.5 (.217) ± 0.5 (.020) 1.1 (.043) ± 0.4 (.016) Q 4300 5500 Ω ± 9% 40 650 Ω ± 7.7% 96.5 – – Resistance - Temperature characteristics: pages 29 to 33. 28 840 Ω ± 10% 110 25 37.8