249-9-10-253
数据手册.pdf
Vishay Semiconductor
威世
电阻
Pot; Cermet; Rest 25KΩ; PCB; 1 Turn; Linear; Pwr-Rtg 1W; Shaft Dia 0.25In
The model 248/249 is a value priced panel control and has proven high performance characteristics in a cost effective package. They are designed to become the choice when seeking high quality, inexpensive panel or PCB mounting potentiometers. The model 248 is conductive plastic with ±20% resistance tolerance and the 249 is cermet with ±10% tolerance. The 248 is 0.5 watts at 70°C with a temperature coefficient of 1000 ppm/°C. The 249 is 1.0 watts at 70°C with a temperature coefficient of 100 ppm/°C. Both have 295° ±5° mechanical rotation with 265° ±5° electrical rotation.- .
- *Rotational Life:** 50,000 cycles. **Shaft:** Plated brass. The housing and rear lid are flame-retardant plastic. **Terminals:** Phosphor bronze with solder plated. **Operating Temperature:** –55°C to +125°C. **Load Life:** 1000 hours at 70°C.