During technical comparisons, REL-FO-LD-110DC-1X21-MS appears alongside Phoenix SMPS, Phoenixcontact Rel Ir Bl L 230Ac 4X21 and Phoenixcontact Phoenix Contact Industrial Ethernet Switches so engineers assess signal types, ingress protection, and ambient tolerances accurately.
Phoenix REL-FO/LD-110DC/1X21/MS Single Relay
The Phoenix REL-FO/LD-110DC/1X21/MS Single Relay (Part No: 1308300 ) offers a 110 V DCnominal input voltage UN, 77 V DC ... 121 V DC input voltage range, 250 V AC switching voltage, FASTON connection method. Manufactured by Phoenix under the Phoenix Single Relay category, this model belongs to the Phoenix REL Series.
| Brand | Phoenix Contact |
| Product Type | Single Relay |
| Model Number | REL-FO/LD-110DC/1X21/MS |
Phoenix REL-FO/LD-110DC/1X21/MS Single Relay β Technical Specifications
| Specification | Value |
|---|---|
| Product type | Single relay |
| Mechanical service life | approx. 5x 107 cycles |
| Insulation | Basic insulation |
| Overvoltage category | II |
| Pollution degree | 3 |
| Service life electrical | - |
| Maximum power dissipation for nominal condition | 0.73 W |
| Test voltage (Winding/contact) | 5 kVrms (50 Hz, 1 min., winding/contact) |
| Test voltage (Changeover contact/changeover contact) | - |
| Rated insulation voltage | 250 V AC |
| Rated surge voltage | 2.5 kV |
| Nominal input voltage UN | 110 V DC |
| Input voltage range | 77 V DC ... 121 V DC |
| Drive and function | monostable |
| Drive (polarity) | polarized |
| Typical input current at UN | 6 mA |
| Typical response time | - |
| Coil voltage | - |
| Status display | LED (yellow) |
| Contact switching type | 1 changeover contact |
| Type of switch contact | Single contact |
| Contact material | AgSnO |
| Maximum switching voltage | 250 V AC |
| Minimum switching voltage | 5 V (100 mA) |
| Limiting continuous current | 12 A |
| Maximum inrush current | 24 A (20 ms, N/O contacts) |
| Min. switching current | - |
| Interrupting rating (ohmic load) max. | 288 W (24 V DC) |
| Connection method | FASTON connection |
| Width | 13 mm |
| Height | 31.1 mm |
| Depth | 35 mm |
| Degree of protection | - |
| Degree of protection (Installation location) | IP54 (Installation location) |
| Ambient temperature (operation) | -40 Β°C ... 70 Β°C |
| Ambient temperature (storage/transport) | -40 Β°C ... 70 Β°C |
| Standards/regulations | IEC 60664-1 |
| Mounting type | - |
| Mounting position | any |
| Mains frequency | - |
| Typical release time range | 5 ms ... 20 ms |
| Coil resistance | 18870 Ξ© Β±10 % |
| Switching capacity | - |
| Motor load according to UL 508 | - |
| Input power dissipation for UN | 0.66 W |
| 3-phase motor load | - |
| Product family | ESSENTIAL edition |
| Relay type | Electromechanical relay |
| Test voltage () | 1 kVrms (50 Hz, 1 min., open contact) |
| Degree of protection (Relay) | RT II (Relay) |
| Inrush current, minimum | 100 mA (5 V) |
| Non-operate voltage | - |
| Safe operate voltage | - |
| Test voltage (N/O contact / N/O contact) | - |
Phoenix Contact REL-FO/LD-110DC/1X21/MS (Part No: 1308300) is a high-performance Freewheeling Diode Single Relay designed for DC switching applications in industrial control systems. Operating at a nominal input voltage of 110 V DC with a range of 77 V to 121 V DC, this relay features a typical input current of 6 mA and delivers safe, efficient control with its built-in diode protection. With a robust mechanical service life of approx. 5Γ10β· cycles, and a maximum switching voltage of 250 V AC, it supports up to 12 A continuous current and 24 A inrush (20 ms, N/O contacts). This RT II-rated relay includes AgSnO contacts, a yellow LED status display, and FASTON connections in a compact housing (13 mm width Γ 31.1 mm height Γ 35 mm depth). Certified to IEC 60664-1, the relay is ideal for engineers seeking reliable, protected relay switching in DC circuits. For more Phoenix Contact relays, visit our Phoenix Relay or Phoenix Contact brand pages.
The Phoenix Contact REL-FO/LD-110DC/1X21/MS is widely used by electrical engineers and panel builders in applications requiring DC coil relays with diode protection. Its freewheeling diode efficiently suppresses voltage spikes generated during coil deactivation, protecting sensitive upstream electronics and ensuring stable relay switching in motor starters, contactors, and safety interlocks.
In practical environments like machine tools, HVAC systems, and power distribution panels, this relay proves essential for reducing electromagnetic interference and extending component lifespan. Maintenance engineers appreciate its wide voltage range, FASTON terminals, and LED status indicator, which simplify diagnostics and minimize downtime. Engineering students and system designers often select this model when learning or building DC relay circuits with integrated protection. With its compact design and high mechanical endurance, it supports long-term industrial reliability, even in high-cycling automation environments.
