Teltonika 4G GPS tracker comparison: FMC920, FMC125 and FMC130

Why compare FMC920, FMC125 and FMC130

If you are coming from an old 2G unit or you are choosing your first 4G LTE Cat 1 for your fleet, these three devices dominate the questions we get. They share important things: 4G LTE Cat 1 modem with 2G fallback, codec 8/8E/16 (see protocol), management via FOTA Web and compatibility with the Teltonika accessory catalog.

What changes is the electronics chassis: number of digital inputs, relay outputs, available serial port, Bluetooth and dual SIM support. That difference defines what fits a delivery van and what a crane with external sensors needs.

Technical table: 10 key specs

Same codec family (8/8E/16), same TAVL/AVL stack, same compatibility with standard servers and platforms like Wialon/Navixy/Flespi.

FMC920: the wired entry-level 4G

The FMC920 is the model we recommend when refreshing a 2G fleet without complications. Three digital inputs are enough for ignition, panic button and one more sensor (door, auxiliary contact). Two outputs for engine cut-off and a secondary buzzer/relay. No RS232, no dual SIM. If you need to locate, geolocate and read ignition, it is plenty.

Typical case: urban delivery van, commercial vehicle without tachograph, company car. If you come from the FMB920 on 2G, the FMC920 is the 1:1 4G replacement.

FMC125: dual SIM, RS485 and demanding environments

The FMC125 adds two things that matter in mid-size fleets: dual SIM (failover between carriers in areas with patchy coverage) and RS485 alongside RS232. RS485 lets you chain sensors on a bus (LLS temperature probes, capacitive fuel-level sensors with 485 output, industrial RFID readers).

Typical case: regional distribution with routes that cross low-coverage areas, refrigerated vehicles with multiple probes, installations where the customer demands network redundancy.

FMC130: the best-selling advanced reference

The FMC130 is the balance 60% of installers ask for: 4 digital inputs, 2 outputs, RS232 available for fuel probes or tachograph (digital reading), and an optional CAN-CONTROL if you want to read the vehicle CAN bus without contacting the manufacturer.

Typical case: mixed fleet with cars, vans and the occasional light heavy unit; installations with temperature and fuel-level sensors; leasing fleets with advanced reporting.

Which to order for each case

• Only location + ignition + engine cut-off: FMC920. Do not pay for ports you will not use.
• Critical or multi-carrier coverage: FMC125 for the dual SIM.
• LLS fuel sensor, temperature probe, tachograph reading: FMC130 with RS232, or FMC125 if you need the 485 bus.
• Native CAN bus reading (RPM, fuel consumption, real odometer): better the FMC150 or FMC130 + CAN-CONTROL.
• Truck with digital tachograph and J1939: step out of this comparison and look at the FMC650.

If you are unsure which inputs you will use, answer the 4 questions in the wizard: in under a minute you get the right model.

Frequently asked questions