Thermistor Probes and Assemblies Surface Temperature Sensing USUR1000 Series UL Recognized Ring Lug Thermistor Assembly Description Littelfuse UL Recognized ring lug thermistor probe assemblies are manufacturing using super stable NTC chips which are potted into a ring lug housing with thermally conductive epoxy. Designed for rapid thermal response and excellent long-term stability, these devices can be used in a wide range of surface temperature sensing applications. Features Insulated lead wire rated Ring tongue mounting for 300V minimum hole diameter 0.145 nominal User selectable lead length Ring tongue mounting hole stud size 6 Dimensions 28 AWG, SINGLE CONDUCTOR THERMISTOR ELEMENT POTTED BARREL Part Numbering System INSULATED WIRE, IN BARREL OF RING LUG HOUSING DIAMETER: UL RATED FOR 300 VOLTS MINIMUM B & 125C MINIMUM A USUR 1000 C Series No Significance F D E Note: Not all combinations of Part Number codes are available. Contact Littelfuse for details. KYNAR SHRINK SLEEVING Dim L is the MIN lead wire length, and is specified by the last two digits of the part number (USUR1000-xxx-xx) e.g. USUR1000-102G-03 would have a MIN lead wire length of 3 A B C D E F STRIP 0.400 0.215 0.280 0.615 DIM L Dimensions in inches. 0.250 0.250 0.020 0.025 0.025 (MIN) 0.070 LONG A B C 0.250 0.215 0.280 0.070 28 AWG, SINGLE CONDUCTOR THERMISTOR ELEMENT POTTED 0.020 0.025 INSULATED WIRE, IN BARREL OF RING LUG HOUSING Strip UL RATED FOR 300 VOLTS MINIMUMBARREL DIAMETER: STRIP & 125C MINIMUM 0.215 0.020 0.250 0.070 D E F 0.280 0.400 0.025 0.615 Dim. L 0.250 0.025 Min. Long DIM L (MINIMUM) 0.615 0.025 KYNAR SHRINK SLEEVING 0.400 0.250 LONG 2018 Littelfuse, Inc. Revised: March 13, 2018 1 littelfuse.com Specifications are subject to change without notice. Thermistor Probes and Assemblies Surface Temperature Sensing USUR1000 Series UL Recognized Ring Lug Thermistor Assembly Specifications Part Resistance Resistance Tol. R-T Beta (K) Max Power Temperature Number Ohms 25C % 25C Curve 0-50C Rating (mW) Rating (C) USUR1000-102G 1000 2 J 3892 20 -40 to +125 USUR1000-102H 1000 3 J 3892 20 -40 to +125 USUR1000-102J 1000 5 J 3892 20 -40 to +125 USUR1000-102K 1000 10 J 3892 20 -40 to +125 USUR1000-222G 2252 2 J 3892 20 -40 to +125 USUR1000-222H 2252 3 J 3892 20 -40 to +125 USUR1000-222J 2252 5 J 3892 20 -40 to +125 USUR1000-222K 2252 10 J 3892 20 -40 to +125 USUR1000-302G 3000 2 J 3892 20 -40 to +125 USUR1000-302H 3000 3 J 3892 20 -40 to +125 USUR1000-302J 3000 5 J 3892 20 -40 to +125 USUR1000-302K 3000 10 J 3892 20 -40 to +125 USUR1000-502G 5000 2 J 3892 20 -40 to +125 USUR1000-502H 5000 3 J 3892 20 -40 to +125 USUR1000-502J 5000 5 J 3892 20 -40 to +125 USUR1000-502K 5000 10 J 3892 20 -40 to +125 USUR1000-103G 10000 2 J 3892 20 -40 to +125 USUR1000-103H 10000 3 J 3892 20 -40 to +125 USUR1000-103J 10000 5 J 3892 20 -40 to +125 USUR1000-103K 10000 10 J 3892 20 -40 to +125 2018 Littelfuse, Inc. Revised: March 13, 2018 2 littelfuse.com Specifications are subject to change without notice.