PEC11D-4120F-H0015 is a 12mm dual concentric rotary encoder with an integrated momentary push switch, designed for precise control applications. It features a metal flattened inner shaft with slotted outer shaft, 30 detents with 15 pulses per 360° rotation, and a 2-bit quadrature code output. The encoder offers a high switch stroke of 1.5 ± 0.5 mm with an actuation force of 400 ± 200 gf, and operates over a temperature range of -40°C to +85°C. With a rotational life of 15,000 cycles minimum and switch life of 20,000 cycles minimum, it provides reliable long-term performance. Common applications include level control, tuning, and menu selection in audio-visual equipment, professional audio consoles, musical instrumentation, and communications equipment.