![[MITSUBISHI ELECTRIC] — MELSERVO-J4 MR-J4-DU Drive Unit & MR-CR Converter Unit (Large Capacity)](https://img.prosourcemro.com/2026/06/0610-7-683x1024.png)
Servo Amplifiers
MITSUBISHI ELECTRIC
[MITSUBISHI ELECTRIC] — MELSERVO-J4 MR-J4-DU Drive Unit & MR-CR Converter Unit (Large Capacity)
Family ID: MEL-MRJ4-DU
Mitsubishi MELSERVO-J4 large-capacity separated-type drive units (30-55kW) requiring an MR-CR converter unit. SSCNET III/H and general-purpose interfaces, 3-phase 200V/400V, HG-JR rotary servo motor compatible.
26 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| MR-J4-DU30KB | MR-J4-DU30KB, 30kW drive unit, SSCNET III/H, requires MR-CR55K | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: SSCNET III/H · Rated Output: 30kW · Power Supply: Supplied from converter unit · Rated Output Current: 174A (output AC170V) · Required Converter Unit: MR-CR55K · Cooling: Forced air · Protection: Open IP20 · Mass: 21kg · Compatible Servo Motor: HG-JR30K1/30K1M | ||
| MR-J4-DU30KB-RJ | MR-J4-DU30KB-RJ, 30kW drive unit, SSCNET III/H, requires MR-CR55K | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: SSCNET III/H · Rated Output: 30kW · Power Supply: Supplied from converter unit · Rated Output Current: 174A (output AC170V) · Required Converter Unit: MR-CR55K · Cooling: Forced air · Protection: Open IP20 · Mass: 21kg · Compatible Servo Motor: HG-JR30K1/30K1M · Variant: -RJ (full-closed 4-wire / functional safety / positioning mode ready) | ||
| MR-J4-DU37KB | MR-J4-DU37KB, 37kW drive unit, SSCNET III/H, requires MR-CR55K | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: SSCNET III/H · Rated Output: 37kW · Power Supply: Supplied from converter unit · Rated Output Current: 204A (output AC170V) · Required Converter Unit: MR-CR55K · Cooling: Forced air · Protection: Open IP20 · Mass: 21kg · Compatible Servo Motor: HG-JR37K1/37K1M | ||
| MR-J4-DU37KB-RJ | MR-J4-DU37KB-RJ, 37kW drive unit, SSCNET III/H, requires MR-CR55K | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: SSCNET III/H · Rated Output: 37kW · Power Supply: Supplied from converter unit · Rated Output Current: 204A (output AC170V) · Required Converter Unit: MR-CR55K · Cooling: Forced air · Protection: Open IP20 · Mass: 21kg · Compatible Servo Motor: HG-JR37K1/37K1M · Variant: -RJ (full-closed 4-wire / functional safety / positioning mode ready) | ||
| MR-J4-DU30KB4 | MR-J4-DU30KB4, 30kW drive unit, SSCNET III/H, requires MR-CR55K4 | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: SSCNET III/H · Rated Output: 30kW · Power Supply: Supplied from converter unit · Rated Output Current: 87A (output AC323V) · Required Converter Unit: MR-CR55K4 · Cooling: Forced air · Protection: Open IP20 · Mass: 16kg · Compatible Servo Motor: HG-JR30K14/30K1M4 | ||
| MR-J4-DU30KB4-RJ | MR-J4-DU30KB4-RJ, 30kW drive unit, SSCNET III/H, requires MR-CR55K4 | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: SSCNET III/H · Rated Output: 30kW · Power Supply: Supplied from converter unit · Rated Output Current: 87A (output AC323V) · Required Converter Unit: MR-CR55K4 · Cooling: Forced air · Protection: Open IP20 · Mass: 16kg · Compatible Servo Motor: HG-JR30K14/30K1M4 · Variant: -RJ (full-closed 4-wire / functional safety / positioning mode ready) | ||
| MR-J4-DU37KB4 | MR-J4-DU37KB4, 37kW drive unit, SSCNET III/H, requires MR-CR55K4 | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: SSCNET III/H · Rated Output: 37kW · Power Supply: Supplied from converter unit · Rated Output Current: 102A (output AC323V) · Required Converter Unit: MR-CR55K4 · Cooling: Forced air · Protection: Open IP20 · Mass: 16kg · Compatible Servo Motor: HG-JR37K14/37K1M4 | ||
| MR-J4-DU37KB4-RJ | MR-J4-DU37KB4-RJ, 37kW drive unit, SSCNET III/H, requires MR-CR55K4 | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: SSCNET III/H · Rated Output: 37kW · Power Supply: Supplied from converter unit · Rated Output Current: 102A (output AC323V) · Required Converter Unit: MR-CR55K4 · Cooling: Forced air · Protection: Open IP20 · Mass: 16kg · Compatible Servo Motor: HG-JR37K14/37K1M4 · Variant: -RJ (full-closed 4-wire / functional safety / positioning mode ready) | ||
| MR-J4-DU45KB4 | MR-J4-DU45KB4, 45kW drive unit, SSCNET III/H, requires MR-CR55K4 | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: SSCNET III/H · Rated Output: 45kW · Power Supply: Supplied from converter unit · Rated Output Current: 131A (output AC323V) · Required Converter Unit: MR-CR55K4 · Cooling: Forced air · Protection: Open IP20 · Mass: 21kg · Compatible Servo Motor: HG-JR45K1M4 | ||
| MR-J4-DU45KB4-RJ | MR-J4-DU45KB4-RJ, 45kW drive unit, SSCNET III/H, requires MR-CR55K4 | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: SSCNET III/H · Rated Output: 45kW · Power Supply: Supplied from converter unit · Rated Output Current: 131A (output AC323V) · Required Converter Unit: MR-CR55K4 · Cooling: Forced air · Protection: Open IP20 · Mass: 21kg · Compatible Servo Motor: HG-JR45K1M4 · Variant: -RJ (full-closed 4-wire / functional safety / positioning mode ready) | ||
| MR-J4-DU55KB4 | MR-J4-DU55KB4, 55kW drive unit, SSCNET III/H, requires MR-CR55K4 | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: SSCNET III/H · Rated Output: 55kW · Power Supply: Supplied from converter unit · Rated Output Current: 143A (output AC323V) · Required Converter Unit: MR-CR55K4 · Cooling: Forced air · Protection: Open IP20 · Mass: 21kg · Compatible Servo Motor: HG-JR55K1M4 | ||
| MR-J4-DU55KB4-RJ | MR-J4-DU55KB4-RJ, 55kW drive unit, SSCNET III/H, requires MR-CR55K4 | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: SSCNET III/H · Rated Output: 55kW · Power Supply: Supplied from converter unit · Rated Output Current: 143A (output AC323V) · Required Converter Unit: MR-CR55K4 · Cooling: Forced air · Protection: Open IP20 · Mass: 21kg · Compatible Servo Motor: HG-JR55K1M4 · Variant: -RJ (full-closed 4-wire / functional safety / positioning mode ready) | ||
| MR-J4-DU30KA | MR-J4-DU30KA, 30kW drive unit, General-Purpose, requires MR-CR55K | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: General-Purpose (pulse train / analog / RS-422 / MODBUS RTU) · Rated Output: 30kW · Power Supply: Supplied from converter unit · Rated Output Current: 174A (output AC170V) · Required Converter Unit: MR-CR55K · Cooling: Forced air · Protection: Open IP20 · Mass: 21kg · Compatible Servo Motor: HG-JR30K1/30K1M | ||
| MR-J4-DU30KA-RJ | MR-J4-DU30KA-RJ, 30kW drive unit, General-Purpose, requires MR-CR55K | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: General-Purpose (pulse train / analog / RS-422 / MODBUS RTU) · Rated Output: 30kW · Power Supply: Supplied from converter unit · Rated Output Current: 174A (output AC170V) · Required Converter Unit: MR-CR55K · Cooling: Forced air · Protection: Open IP20 · Mass: 21kg · Compatible Servo Motor: HG-JR30K1/30K1M · Variant: -RJ (full-closed 4-wire / functional safety / positioning mode ready) | ||
| MR-J4-DU37KA | MR-J4-DU37KA, 37kW drive unit, General-Purpose, requires MR-CR55K | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: General-Purpose (pulse train / analog / RS-422 / MODBUS RTU) · Rated Output: 37kW · Power Supply: Supplied from converter unit · Rated Output Current: 204A (output AC170V) · Required Converter Unit: MR-CR55K · Cooling: Forced air · Protection: Open IP20 · Mass: 21kg · Compatible Servo Motor: HG-JR37K1/37K1M | ||
| MR-J4-DU37KA-RJ | MR-J4-DU37KA-RJ, 37kW drive unit, General-Purpose, requires MR-CR55K | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: General-Purpose (pulse train / analog / RS-422 / MODBUS RTU) · Rated Output: 37kW · Power Supply: Supplied from converter unit · Rated Output Current: 204A (output AC170V) · Required Converter Unit: MR-CR55K · Cooling: Forced air · Protection: Open IP20 · Mass: 21kg · Compatible Servo Motor: HG-JR37K1/37K1M · Variant: -RJ (full-closed 4-wire / functional safety / positioning mode ready) | ||
| MR-J4-DU30KA4 | MR-J4-DU30KA4, 30kW drive unit, General-Purpose, requires MR-CR55K4 | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: General-Purpose (pulse train / analog / RS-422 / MODBUS RTU) · Rated Output: 30kW · Power Supply: Supplied from converter unit · Rated Output Current: 87A (output AC323V) · Required Converter Unit: MR-CR55K4 · Cooling: Forced air · Protection: Open IP20 · Mass: 16kg · Compatible Servo Motor: HG-JR30K14/30K1M4 | ||
| MR-J4-DU30KA4-RJ | MR-J4-DU30KA4-RJ, 30kW drive unit, General-Purpose, requires MR-CR55K4 | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: General-Purpose (pulse train / analog / RS-422 / MODBUS RTU) · Rated Output: 30kW · Power Supply: Supplied from converter unit · Rated Output Current: 87A (output AC323V) · Required Converter Unit: MR-CR55K4 · Cooling: Forced air · Protection: Open IP20 · Mass: 16kg · Compatible Servo Motor: HG-JR30K14/30K1M4 · Variant: -RJ (full-closed 4-wire / functional safety / positioning mode ready) | ||
| MR-J4-DU37KA4 | MR-J4-DU37KA4, 37kW drive unit, General-Purpose, requires MR-CR55K4 | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: General-Purpose (pulse train / analog / RS-422 / MODBUS RTU) · Rated Output: 37kW · Power Supply: Supplied from converter unit · Rated Output Current: 102A (output AC323V) · Required Converter Unit: MR-CR55K4 · Cooling: Forced air · Protection: Open IP20 · Mass: 16kg · Compatible Servo Motor: HG-JR37K14/37K1M4 | ||
| MR-J4-DU37KA4-RJ | MR-J4-DU37KA4-RJ, 37kW drive unit, General-Purpose, requires MR-CR55K4 | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: General-Purpose (pulse train / analog / RS-422 / MODBUS RTU) · Rated Output: 37kW · Power Supply: Supplied from converter unit · Rated Output Current: 102A (output AC323V) · Required Converter Unit: MR-CR55K4 · Cooling: Forced air · Protection: Open IP20 · Mass: 16kg · Compatible Servo Motor: HG-JR37K14/37K1M4 · Variant: -RJ (full-closed 4-wire / functional safety / positioning mode ready) | ||
| MR-J4-DU45KA4 | MR-J4-DU45KA4, 45kW drive unit, General-Purpose, requires MR-CR55K4 | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: General-Purpose (pulse train / analog / RS-422 / MODBUS RTU) · Rated Output: 45kW · Power Supply: Supplied from converter unit · Rated Output Current: 131A (output AC323V) · Required Converter Unit: MR-CR55K4 · Cooling: Forced air · Protection: Open IP20 · Mass: 21kg · Compatible Servo Motor: HG-JR45K1M4 | ||
| MR-J4-DU45KA4-RJ | MR-J4-DU45KA4-RJ, 45kW drive unit, General-Purpose, requires MR-CR55K4 | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: General-Purpose (pulse train / analog / RS-422 / MODBUS RTU) · Rated Output: 45kW · Power Supply: Supplied from converter unit · Rated Output Current: 131A (output AC323V) · Required Converter Unit: MR-CR55K4 · Cooling: Forced air · Protection: Open IP20 · Mass: 21kg · Compatible Servo Motor: HG-JR45K1M4 · Variant: -RJ (full-closed 4-wire / functional safety / positioning mode ready) | ||
| MR-J4-DU55KA4 | MR-J4-DU55KA4, 55kW drive unit, General-Purpose, requires MR-CR55K4 | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: General-Purpose (pulse train / analog / RS-422 / MODBUS RTU) · Rated Output: 55kW · Power Supply: Supplied from converter unit · Rated Output Current: 143A (output AC323V) · Required Converter Unit: MR-CR55K4 · Cooling: Forced air · Protection: Open IP20 · Mass: 21kg · Compatible Servo Motor: HG-JR55K1M4 | ||
| MR-J4-DU55KA4-RJ | MR-J4-DU55KA4-RJ, 55kW drive unit, General-Purpose, requires MR-CR55K4 | MITSUBISHI ELECTRIC | Type: Drive Unit (separated converter required) · Interface: General-Purpose (pulse train / analog / RS-422 / MODBUS RTU) · Rated Output: 55kW · Power Supply: Supplied from converter unit · Rated Output Current: 143A (output AC323V) · Required Converter Unit: MR-CR55K4 · Cooling: Forced air · Protection: Open IP20 · Mass: 21kg · Compatible Servo Motor: HG-JR55K1M4 · Variant: -RJ (full-closed 4-wire / functional safety / positioning mode ready) | ||
| MR-CR55K | MR-CR55K converter unit, 55kW, 3-phase 200V, for MR-J4-DU 200V drive units | MITSUBISHI ELECTRIC | Type: Converter Unit (for MR-J4-DU drive units) · Rated Output: 55kW · Output Voltage/Current: DC270-324V / 215.9A · Power Supply: 3-phase AC200-240V, 50/60Hz · Rated Input Current: 191.3A · Cooling: Forced air · Protection: Open IP20 · Mass: 22kg · Pairs With: MR-J4-DU30KB/A, MR-J4-DU37KB/A (200V) | ||
| MR-CR55K4 | MR-CR55K4 converter unit, 55kW, 3-phase 400V, for MR-J4-DU 400V drive units (search alt: MR-CR55K-4) | MITSUBISHI ELECTRIC | Type: Converter Unit (for MR-J4-DU drive units) · Rated Output: 55kW · Output Voltage/Current: DC513-648V / 113.8A · Power Supply: 3-phase AC380-480V, 50/60Hz · Rated Input Current: 100.7A · Cooling: Forced air · Protection: Open IP20 · Mass: 22kg · Pairs With: MR-J4-DU30/37/45/55KB4/A4 (400V) |
