2322 640 90004/98004 Vishay BCcomponents NTC Thermistors, Molded Range FEATURES • Designed for harsh environments • Excellent for surface temperature measurement • Metal strip for heat conduction and easy mounting (2322 640 98004) • High accuracy at 100 °C • Minimum 350 V dielectric withstanding voltage APPLICATIONS High temperature measurement control: DESCRIPTION QUICK REFERENCE DATA VALUE PARAMETER 2322 640 90004 2322 640 98004 Resistance value at: +25 °C 12 kΩ +100 °C 950 Ω MARKING Tolerance on R25-value: +25 °C The thermistors are marked with a grey dot. ±7% +100 °C ±5% MOUNTING B25/85-value 3750 K Temperature coefficient −4.2%/K Maximum dissipation Dissipation factor when mounted on a heatsink; note 1 Thermal time constant Molded chip thermistor with negative temperature control and two solid tinned nickel leads. The body color is white and the device is non-flammable. The thermistor 2322 640 98004 is provided with a metal strip for mounting. 2322 640 90004: by soldering in any position 2322 640 98004: by means of the mounting strip. 0.25 W 7 mW/K 9.5 mW/K 19 mW/K 27 mW/K 19 s 33 s PACKAGING The thermistors are packed in cardboard boxes: 10 s 5s 2322 640 90004: 500 units Heat capacity of ceramic (in air) 0.028 J/K 0.028 J/K 2322 640 98004: 400 units. when mounted on a heatsink 0.13 J/K 0.3 J/K Response time; note 2 3s DIMENSIONS in millimeters Operating temperature range: Insulation resistance between terminals and coating at 100 V (DC) Mass ≈0.5 g 0.6 3.6 ±0.4 R 1.25 min. 100 MΩ ≈0.3 g 18 ±0.2 8 ±0.2 min. 350 V 2.5 ±0.2 4 ±0.2 0 to +55 °C 27 ±2 Dielectric withstanding voltage (RMS) between terminals and coating −10 to +125 °C 4.4 ±0.2 at zero dissipation at maximum dissipation 21 ±0.1 when mounted on a heatsink; note 2 Notes dia0.6 1. Measurements made in still air with the thermistor mounted on a heatsink of 100 cm2, thickness 1.5 mm, connected between phosphor-bronze wires (∅1.3 mm). 0.6 ±0.06 2.54 ±0.3 2.54 ±0.3 2. The thermistor being transferred from ambient air of +25 °C to a silicone oil (MS200/50) bath of 85 °C. 5.3 ±0.4 Component outline 2322 640 90004. www.vishay.com 132 For technical questions contact: [email protected] Document Number: 29067 Revision: 10-Oct-03