During technical comparisons, MG21DH appears alongside GIC Dms120, GIC Temperature Controller and GIC GIC so engineers assess signal types, ingress protection, and ambient tolerances accurately.
GIC MG21DH Voltage Monitoring
The GIC MG21DH Voltage Monitoring offers 208 - 480 VAC, (3 Phase 3 Wire) supply voltage, 1 C/O relay output, Base / DIN rail mounting, IP 20 for Terminal, IP 30 for Enclosure degree of protection. Manufactured by GIC under the GIC Voltage Monitoring category, this model belongs to the GIC DM Series.
| Brand | GIC |
| Product Type | Voltage Monitoring |
| Model Number | MG21DH |
GIC MG21DH Voltage Monitoring β Technical Specifications
| Specification | Value |
|---|---|
| Supply Voltage | 208 - 480 VAC, (3 Phase 3 Wire) |
| Supply Variation | -12% to + 10% |
| Frequency | 50/60 Hz |
| Power Consumption (Max.) | 3 VA |
| Phase Loss | Yes |
| Phase Asymmetry | 10% Fixed |
| Under Voltage | -5% to -25% |
| Over Voltage | 5% to +25% |
| ON Delay | 0.5 to 100 s (Selectable) |
| Trip Time (OFF Delay) | 5s |
| Relay Output | 1 C/O |
| Contact Rating | 5A @ 250 VAC / 30 VDC (Resistive) |
| Electrical Life | 1X10^ 5 |
| Mechanical Life | 3X10^ 6 |
| Utilization Category AC-15 | Rated Voltage (Ue): 120/240 V, Rated Current (Ie): 3.0/1.5 A |
| Utilization Category DC-13 | Rated Voltage (Ue): 24/125/250 V, Rated Current (Ie): 2.0/0.22/0.1 A |
| Operating Temperature | - 15 C to +60 C |
| Storage Temperature | - 20 C to +80 C |
| Humidity (Non Condensing) | 95% (Rh) |
| Enclosure | Flame Retardant UL 94-V0 |
| Dimension (W x H x D) (in mm) | 18 X 90 X 58.5 |
| Weight | 70 g |
| Mounting | Base / DIN rail |
| Degree of Protection | IP 20 for Terminal, IP 30 for Enclosure |
GIC MG21DH Voltage Monitoring Relay is engineered for 208β480 VAC three-phase systems, operating with a supply variation tolerance of -12% to +10% while consuming only 3 VA. The MG21DH GIC unit provides protection against phase loss, fixed 10% asymmetry, and both under-voltage (-5% to -25%) and over-voltage (+5% to +25%) conditions. Engineers benefit from selectable ON delay settings between 0.5 and 100 seconds, paired with a fixed 5-second OFF delay for fault handling. A robust 1 C/O relay output rated 5A @ 250 VAC/30 VDC ensures seamless integration into control systems. With an electrical life of 100,000 operations, mechanical life of 3 million, and compact 18 Γ 90 Γ 58.5 mm housing, the GIC MG21DH delivers durability, easy DIN rail mounting, and dependable service in demanding environments.
The GIC MG21DH Voltage Monitoring device is trusted for use in automation panels, elevators, HVAC systems, motor circuits, and water pumps. Engineers depend on its quick detection of voltage fluctuations and phase faults to reduce downtime, while maintenance teams value its compact size and simple wiring for faster installation. Capable of operating from -15Β°C to +60Β°C with tolerance for 95% humidity, the MG21DH Voltage Monitoring Relay ensures reliable performance in factories, workshops, and commercial complexes, protecting equipment life and improving system stability.
The MG21DH is part of GICβs proven portfolio of monitoring solutions, delivering precision, ruggedness, and long service life. Industrial buyers rely on GIC Monitoring technology to safeguard automation systems against costly breakdowns, and the MG21DH GIC model is recognized for its adaptability in modern industrial setups. Engineers studying the MG21DH Datasheet appreciate its detailed specifications, which confirm its suitability for critical applications. By combining safety, efficiency, and ease of integration, the GIC MG21DH Voltage Monitoring Relay stands as a trusted choice for industries seeking dependable power supervision and long-term operational stability.
