Vishay Spectrol Potentiometers Visit SpectrolOs Website at www.spectrol.com Model 657 New Sealed Precision Potentiometer c c c c Rugged Industrial Design Fully Sealed Construction Provides High Immunity to Environmental Damage Long Life Conductive Plastic Resistor Exceeds 1,000,000 Cycles Wide Operating Temperature Range: 40C to +125C Electrical. Total Resistance: Standard Range N 1 K to 200 K; Tolerance N Standard 20%. Linearity (Independent): Standard N 5%; Special N 2%. Rotation: 240 4. Power Rating: 1.0 watt at 85C. Dielectric Strength: 500 volts at 60 Hz minimum. Output Smoothness: 0.2% maximum. Stock No. Mfr.Os Type Ohms 970-2156 970-2158 970-2160 970-2162 970-2164 970-2166 657-0-0-102 657-0-0-202 657-0-0-502 657-0-0-103 657-0-0-203 657-0-0-503 1K 2K 5K 10 K 20 K 50 K EACH 1-9 10-24 25-49 50-99 14.10 14.10 14.10 14.10 14.10 14.10 11.06 11.06 11.06 11.06 11.06 11.06 9.50 9.50 9.50 9.50 9.50 9.50 8.50 8.50 8.50 8.50 8.50 8.50 Model 157 Precision Industrial Potentiometer The model 157 features a rugged moisture resistant one piece aluminum anodized metal housing with a rear lid, stainless steel shaft, long 2,000,000 turns rotational life, wide operating range and solderable terminals. These 1.0 watt at 40C are derated to 0 watts at 125C. Load Life: 900 hours. Electrical Travel: 340 (4). Mechanical Travel: 360 continuous. The bushing uses a sleeve bearing. Resistance Tolerance: 20% with 600 ppm/C temperature coefficient. Operating Temperature: 55C to +125C. Optional features that are available as special order items include mechanical stops at 340, internal shaft seal, high torque, 1/8" diameter shaft, shaft slot, special shaft lengths, no locating pin and special electrical angles. ManufacturerOs literature available upon request. Stock No. Mfr.Os Type Ohms 970-2050 970-2052 970-2054 970-2056 970-2058 970-2060 157-1-1-102 157-1-1-202 157-1-1-502 157-1-1-103 157-1-1-203 157-1-1-503 1K 2K 5K 10 K 20 K 50 K EACH 1-9 10-24 25-49 50-99 100-249 20.81 20.02 21.22 20.02 20.02 20.02 14.12 13.59 14.41 13.59 13.59 13.59 13.01 12.52 13.27 12.52 12.52 12.52 11.77 11.32 12.01 11.32 11.32 11.32 11.00 10.58 11.22 10.58 10.58 10.58 Models 248 and 249 Panel Control Potentiometers 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 70C with a temperature coefficient of 1000 ppm/C. The 249 is 1.0 watts at 70C 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: 55C to +125C. Load Life: 1000 hours at 70C. Additional configurations such as rear standoffs, solder hook terminals, rear locating lugs, audio taper and various shaft lengths in plastic or metal are available as special order items. ManufacturerOs literature available upon request. Stock No. Mfr.Os Type Ohms 970-2100 970-2102 970-2104 970-2106 970-2116 970-2118 970-2120 970-2134 970-2138 970-2140 970-2142 970-2144 970-2146 970-2148 970-2150 970-2152 970-2154 248-8-08-102 248-8-08-252 248-8-08-502 248-8-08-103 248-9-10-252 248-9-10-502 248-9-10-103 249-8-08-103 249-8-08-503 249-8-08-104 249-9-10-102 249-9-10-252 249-9-10-502 249-9-10-103 249-9-10-253 249-9-10-503 249-9-10-104 1K 2.5 K 5K 10 K 2.5 K 5K 10 K 10 K 50 K 100 K 1K 2.5 K 5K 10 K 25 K 50 K 100 K Shaft Dia. (In.) Shaft Length (In.) 1/8 1/8 1/8 3/4 3/4 3/4 1/4 1/4 1/8 7/8 7/8 3/4 1/8 1/4 1/8 1/8 1/4 1/4 1/4 1/4 1/4 1/4 1/4 3/4 7/8 3/4 3/4 7/8 7/8 7/8 7/8 7/8 7/8 7/8 EACH 1-9 10-24 25-49 50-99 100-249 5.72 4.62 5.72 5.72 5.72 4.62 5.72 5.72 5.72 5.72 5.72 5.72 5.78 5.72 5.72 5.72 5.72 5.24 4.23 5.24 5.24 5.24 4.23 5.24 5.24 5.24 5.24 5.24 5.24 5.29 5.24 5.24 5.24 5.24 4.82 3.89 4.82 4.82 4.82 3.89 4.82 4.82 4.82 4.82 4.82 4.82 4.86 4.82 4.82 4.82 4.82 4.36 3.52 4.36 4.36 4.36 3.52 4.36 4.36 4.36 4.36 4.36 4.36 4.40 4.36 4.36 4.36 4.36 3.93 3.17 3.93 3.93 3.93 3.17 3.93 3.93 3.93 3.93 3.93 3.93 3.96 3.93 3.93 3.93 3.93 Check Pricing And Availability Of All Items On The Internet At www.alliedelec.com ALLIED c 647 11