NTC thermistors are packaged as a Bulk. The Nonstandard Chip package contains it for your convenience. In order for NTC thermistors to operate, the resistance tolerance must be ±10%. When using NTC thermistors, the temperature should be set to 150°C to ensure reliable operation.
BC103J1K Features
Package/Case: Bulk BC Series Operating Temperature: 150°C Mounting Type: Surface Mount
BC103J1K Applications
There are a lot of Littelfuse Inc. BC103J1K NTC Thermistors applications.
Temperature compensation of display backlighting (CCFL)