Best 4G/5G SCADA Modems to Replace 3G

The "3G modem for SCADA" market is currently in a state of forced migration due to global 3G network sunsets, with major carriers across North America, the UK, and Canada scheduled to retire 3G services between 2025 and 2027 Iotportal.

Market Trends & Transition Insights

* The 3G Sunset: Carriers are repurposing 3G spectrum for 5G. In Canada, Rogers begins phasing out 3G in August 2025, while Bell and Telus have set final deadlines for March 2027 Iotportal.

* Rise of 5G RedCap: 5G "Reduced Capability" (RedCap) is emerging as the successor for SCADA applications, offering the reliability of 5G at lower costs and power consumption, ideal for industrial sensors Hologram Iotportal.

* Edge AI & NTN: Modern modems are shifting toward Edge AI for local data filtering and Non-Terrestrial Networks (NTN) for satellite-cellular failover in remote sites Hologram.

* eSIM Adoption: The move to SGP.32 eSIM standards allows for remote carrier switching, critical for avoiding physical site visits during network upgrades or carrier changes Hologram.

Critical Product Features for 2026

Transitioning to 4G/5G requires modems that bridge legacy field equipment with modern IP infrastructure:

* Legacy Protocol Support: Native support for Modbus RTU/TCP, DNP3, and IEC 60870-5-104 is essential to avoid using external protocol converters Iotportal.

* Hardware Connectivity: Dual-SIM slots for carrier failover and RS232/RS485 serial ports to connect with existing PLCs and RTUs Iotportal.

* Industrial Ruggedness: Wide operating temperatures (-40°C to +75°C) and DIN-rail mounting are standard requirements for utility and oil & gas environments Scadalink Iotportal.