The Mitsubishi HG-SN302J is a medium-inertia AC servo motor from the MELSERVO-JE series, delivering 3kW rated output at 200VAC class 3-phase supply. It provides 14.3 Nm rated torque at 2000 rpm, with a maximum torque of 42.9 Nm for short-duration peak loads. The 17-bit absolute/incremental encoder (131,072 pulses per revolution) offers high-resolution position feedback for precise motion control applications. Being medium inertia, the HG-SN302J is well-suited for applications with moderate load-to-motor inertia ratios. The HG-SN series features a 2.0kHz speed frequency response for responsive servo performance. Typical applications include CNC machine tools, injection molding machines, printing presses, textile machinery, industrial robots, packaging equipment, and material handling systems where high torque at moderate speeds is required for sustained production duty.
**Q: Which servo amplifier pairs with the HG-SN302J?**
A: The HG-SN302J is designed for Mitsubishi MR-JE series servo amplifiers, specifically the MR-JE-300A (3kW) or MR-JE-300B models. It connects using standard MELSERVO-JE motor power and encoder cables.
**Q: What is the difference between HG-SN (JE series) and HG-JR (J4 series)?**
A: HG-SN is MELSERVO-JE series (cost-optimized, up to 3kW), while HG-JR is MELSERVO-J4 series (premium, with higher encoder resolution and broader power range). Both are medium inertia. JE series offers excellent value for standard automation applications.
**Q: Does this motor include a holding brake?**
A: The HG-SN302J does not include a brake. For applications requiring an electromagnetic holding brake (e.g., vertical axes), use the HG-SN302BJ or HG-SN302BJK variant.
**Q: What is the maximum speed the motor can achieve?**
A: The maximum speed is 3000 rpm, which is 1.5x the rated speed of 2000 rpm. However, torque decreases above rated speed due to voltage limitations of the 200VAC class supply.
**Q: Can the HG-SN302J operate in harsh environments?**
A: With IP65 rating (excluding shaft), the motor can withstand dust and water jets. The oil seal is standard, making it suitable for machine tools and other environments with cutting fluid exposure.
