MPL‑B420P (Allen‑Bradley / Rockwell Automation)
May 28, 2026

MPL‑B420P (Allen‑Bradley / Rockwell Automation)

MPL‑B420P is a low‑inertia, brushless permanent‑magnet servo motor from the Allen‑Bradley MP‑Series, designed for high‑performance motion control. It is active / current and widely used in automation, packaging, machine tools, and material handling.

Description

1. Basic Specifications

  • Manufacturer: Allen‑Bradley (Rockwell Automation)

  • Series: MP‑Series, MPL (Low Inertia)

  • Frame Size: Frame 4 = 115 mm flange (IEC metric)

  • Rated Power: 1.9 kW

  • Rated Speed: 5,000 rpm (max 5,000 rpm)

  • Voltage: 400 / 460 / 480 VAC, 3‑phase

  • Continuous Torque: 4.74 Nm

  • Peak Torque: 13.5 Nm

  • Rotor Inertia: 0.00025 kg·m² (very low)

  • Rated Current: 6.4 A; Peak 22.0 A

  • Feedback: High‑resolution absolute encoder (single‑turn / multi‑turn, Hiperface, 1024 Sin/Cos)

  • Shaft: Keyed or keyless options; 24V DC brake optional

  • Protection: IP66 (dust tight, splash resistant)

  • Weight: ~4.3–5.4 kg (depending on options)

  • Mounting: IEC metric flange, FF‑type free mounting holes

2. Key Features

  • Low inertia: Fast dynamic response, ideal for high‑speed cycling and positioning.

  • High accuracy: Absolute encoder provides battery‑free multi‑turn position feedback.

  • Robust construction: IP66 rated for washdown and harsh industrial environments.

  • Quick‑connect: SpeedTEC DIN connector, right‑angle, 180° rotatable for easy wiring.

  • Food‑grade option: Epoxy coating, stainless steel hardware, food‑grade grease available.

  • Wide compatibility: Works with Allen‑Bradley Kinetix 5500/5700/7000 and Ultra drives.

3. Typical Applications

  • Packaging & processing machinery

  • CNC machine tools & robotics

  • Material handling & conveyors

  • Automotive assembly

  • General automation requiring fast, precise motion

4. Summary

The MPL‑B420P is a 1.9 kW, 5000 rpm, low‑inertia servo motor with IP66 protection and high‑resolution absolute feedback. It delivers excellent dynamic performance and reliability for demanding industrial motion control applications.


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