TRF250-145T

PolySwitch® PTC Devices PRODUCT: TRF250-145T DOCUMENT: SCD26222 REV LETTER: F REV DATE: JULY 26, 2016 PAGE NO.: 1 OF 2 Overcurrent Protection Device Specification Status: Released Operating Conditions at 20°C: Maximum Continuous Operating Voltage (VMCO): 60VDC Maximum Interrupt Current (IINT ): 3ARMS Fault Ratings at 20°C: 250VRMS, 3A, 10 applications Additional Info at 20°C:  Resistance matched: n/a  Lightning withstand: 1.5 kV per ITU-T K.20, K.21  Helps equipment meet ITU-T K.20, K.21 Recommendations  Helps equipment meet Telcordia GR1089 intrabuilding requirements Lead Material: 22 AWG Sn-Plated Copper (0.64 mm [0.025”] nominal diameter) External Coating Material: Cured, flame retardant epoxy polymer, meeting UL94 V-0 requirements Marking: TABLE I. DIMENSIONS: A mm: in: MIN MAX MIN B MAX MIN C MAX MIN D MAX E NOM MIN F MAX --- 6.5 (0.26) --- 11.0 (0.43) --- 4.6 (0.18) 4.7 (0.19) --- 5.0 (0.20) --- 7.0 (0.28) *Rounded off approximation TABLE II. PERFORMANCE RATINGS @ 20°C: HOLD TRIP CURRENT CURRENT (A) (A) RESISTANCE (Ω) R MIN R MAX R1 MAX* 0.145 0.290 5.4 7.5 14.0 *Post Trip Resistance measured after one hour. TIME TO TRIP(Sec) OPERATING @ 1A TEMPERATURE (°C) TYP 1.5 MAX 2.5 MIN -40 MAX 85 TRIPPED POWER DISSIPATION (W) @ 60VDC TYP MAX 0.8 0.9 TABLE III. APPLICABLE PART DESCRIPTIONS: PART DESCRIPTION TRF250-145T PACKAGING TYPE Bulk NOTES N/A Agency Recognitions: UL (File #E74889), CSA (File #78165C), TUV Reference Documents: PS300, ITU-T K.20, K.21 Precedence: This specification takes precedence over documents referenced herein. Effectivity: Reference documents shall be the issue in effect on the date of invitation for bid. CAUTION:Operation beyond the rated voltage or current may result in rupture, electrical arcing or flame. Materials Information ROHS Compliant © 2016 Littelfuse,Inc. Specifications are subject to change without notice. Revised July 26,2016 ELV Compliant Pb-Free littelfuse.com PolySwitch® PTC Devices Overcurrent Protection Device PRODUCT: TRF250-145T DOCUMENT: SCD26222 REV LETTER: F REV DATE: JULY 26, 2016 PAGE NO.: 2 OF 2 Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, military, aerospace, medical, lifesaving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. © 2016 Littelfuse,Inc. Specifications are subject to change without notice. Revised July 26,2016 littelfuse.com