General Information

• Part Number: 0-57026 (57026)

• Manufacturer: Reliance Electric (Rockwell Automation / Baldor-Reliance)

• Product Type: Rotary Switch (Circular Wafer, Bushing Mount)

• Application: Industrial control, DC drive panels, signal selection & mode switching

• Status: Obsolete; new surplus & refurbished units available

• Mounting: Panel mount, 0.375” UNC threaded bushing

Electrical Specifications

• Contact Rating: 2.0 A resistive AC/DC @ sea level

• Insulation Resistance: ≥100 MΩ @ 500 VDC

• Dielectric Strength: 1,000 Vrms minimum @ sea level

• Contact Material: Silver (precious metal)

• Terminal Type: Tab / solder lug

• Switching Action: Breaks before makes (non-shorting) per section

Mechanical Characteristics

• Form Factor: Circular wafer, single actuator

• Shaft Diameter: 0.250 in (6.35 mm)

• Shaft Length: 0.880 in (22.35 mm)

• Overall Diameter: 1.560 in (39.62 mm)

• Overall Length: 1.777 in (45.14 mm)

• Thread: 0.375 in UNC, 2A class

• Detent Increment: 30° per step

• Number of Positions: Multi-position (standard 12-position)

• Weight: ~0.15 kg (0.33 lbs)

• Housing Material: Glass-filled nylon (UL 94V-0)

Environmental Ratings

• Operating Temp: -30°C to +85°C

• Storage Temp: -30°C to +85°C

• Humidity: 10%–90% RH, non-condensing

• Altitude: Up to 3,000 m (10,000 ft)

Key Features

1. Precision Switching: 30° detent for accurate position control

2. Durable Construction: Silver contacts, glass-filled nylon housing

3. Panel Mount: 0.375” threaded bushing for secure installation

4. Non-Shorting: Breaks before makes to prevent signal cross-talk

5. Industrial Grade: High insulation & dielectric strength for noise immunity

Compatibility

• Fits Reliance FlexPak / CardPak DC drive panels

• Compatible with legacy Reliance control circuits

• Direct replacement for 0-57026; no wiring modifications required