SX1278

The SX1278 is a Semtech LoRa® transceiver covering the 137–525 MHz frequency range, including the popular 433 MHz band widely used for UAV long-range telemetry links in regions outside the Americas. It delivers up to +20 dBm TX power and a best-in-class receive sensitivity of −148 dBm, enabling link budgets exceeding 168 dB.

Used in many long-range RC systems and drone telemetry modules including ExpressLRS 433MHz hardware, RFD900-style clones, and MAVLink telemetry radios. The SX1278 is essentially the "433MHz SX1276" — same silicon with different factory-configured frequency range.

SX1278 vs SX1276

• SX1278: 137–525 MHz — for 433MHz regions (Europe, Asia, Africa)
• SX1276: 137 MHz – 1020 MHz — covers both 433MHz and 868/915MHz
• Same LoRa performance, identical SPI interface
• SX1278 may offer slight cost advantage for 433MHz-only designs

• SX1276

  137–1020 MHz · +20dBm · Full band LoRa — 868/915MHz telemetry
  In StockQuote
• SX1262

  150–960 MHz · +22dBm · New gen LoRa · Lower power
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• SX1280

  2.4GHz LoRa · Ultra-low latency · 2Mbps · ExpressLRS 2.4G
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