Operating Temperature Range. LT4K: –55°C to +125°C. LT10K: –55°C to +105°C Current Rating at 90°C Ambient. LT4K: 35°C Rise. LT10K: 15°C Rise. Maximum Power Dissipation at 90°C. Phenolic: LT4K: 0.21 W. Iron: LT10K: 0.09 W. Ferrite: LT10K: 0.073 W. Optional Tolerances: 5%, 3%, 2% and 1% available