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SARA-R4 series

Multi-band LTE-M / NB-IoT and EGPRS modules

Ultra-compact LTE-M / NB-IoT and EGPRS modules with multi-regional coverage

  • Configurable with a single hardware version
  • Flexible mode selection as LTE Cat M1 / LTE Cat NB1 / EGPRS – only/preferred
  • Built‑in device and data security with root of trust (-x3B variants)
  • Deliver critical firmware updates via uFOTA with LwM2M
  • Easy migration between u‑blox 2G, 3G and 4G modules

Product variants


LTE module for Japan; Cat M1 deployed bands 1, 8, 19


LTE Module for Korea; Cat M1 deployed bands 3, 5, 26


LTE module for multi-regional use; Cat M1, NB1 bands: 3, 5, 8, 20, 28


LTE module for North America; Cat M1 deployed bands 2, 4, 5, 12, 13


LTE module for multi-regional use; Cat M1/NB1 deployed bands: 1*, 2, 3, 4, 5, 8, 12, 13, 18, 19, 20, 25, 26*, 28 (* roaming bands)


LTE & 2G module for multi-regional use; Cat M1/NB1 deployed bands: 2, 3, 4, 5, 8, 12, 13, 20, 26*, 28*; EGPRS quad-band, 850/900/1800/1900 MHz (* roaming bands)

Product variantsSARA-R410M-63BSARA-R410M-73BSARA-R410M-83BSARA-R410M-52BSARA-R410M-02BSARA-R412M-02B
North America
Cellular features 
LTE bands1, 8, 193, 5, 263, 5, 8, 20, 282, 4, 5, 12, 131, 2, 3, 4, 5, 8, 12, 13, 18, 19, 20, 25, 26, 282, 3, 4, 5, 8, 12, 13, 20, 26, 28
Data ratesM1 (300 kbit/s DL and 375 kbit/s UL)M1 (300 kbit/s DL and 375 kbit/s UL), NB1 (27.2 kbit/s DL, 62.5 kbit/s UL)
GSM bandsQuad-band
Positioning (for CEL products)AssistNow, CellLocate, GNSS via ModemAssistNow, GNSS via Modem
DDC (I2C compliant)1
Environmental data, quality & reliability 
Size [mm]16 x 26 x 2.5
Antenna detection
Deep sleep mode
Dual stack IPv4/IPv6
Embedded DTLS 1.2
Embedded FTP/HTTP
Embedded MQTT, MQTT-SN
Embedded TCP/UDP
Embedded TLS 1.2
FW update via serial interface
Last gasp
LWM2M with dynamically configurable objects
Power Save Mode Rel.12
Security Root of Trust
MarketsAutomotive & Transport, Industry, Smart Cities, Healthcare, Retail, Smart Home & Buildings

At 16 x 26 mm, the SARA‑R4 series modules provide an ultra‑compact LTE Cat M1 / NB1 and EGPRS multimode product in a single hardware design. They have software‑based LTE band configuration, and come in an LGA package for easy manufacturing.

The SARA‑R410M and SARA‑R412M variants simplify diverse deployments worldwide and provide enormous operational efficiencies. Software‑based configurability of operator profiles and LTE bands enables a wide range of multi‑regional coverage. The flexibility extends further through system selection as LTE Cat M1, LTE Cat NB1, EGPRS single or preferred modes. Customers can future‑proof their solutions by means of OTA firmware updates, thanks to the uFOTA client/server solution, which utilizes LWM2M, a light and compact protocol ideal for IoT applications.

 The three SARA‑R4 (x3B) module variants – SARA‑R410‑63B, SARA‑R410‑73B, and SARA‑R410‑83B – are ideal for mission‑critical IoT solutions, as they include a built‑in device and data security solution with a unique and immutable root‑of‑trust. With u‑blox CellLocate® cellular positioning technology, the device enjoys always and everywhere location awareness.

The SARA‑R4 modules are targeted to a wide range of data‑centric IoT applications, such as smart metering, smart lighting, telematics, asset tracking, remote monitoring, alarm panels, and connected health. The SARA‑R4 modules target long life, low‑maintenance, cost‑sensitive, lower power consumption, extended battery life applications.

The SARA form factor follows the u‑blox nested design principle and is compatible with other u‑blox product families, which facilitates easy migration from 2G, 3G and 4G. This also maximizes the investments of customers, simplifies logistics, and enables very short time‑to‑market.

The temperature range of –40 to +85 °C guarantees operation in harsh environments. The module is manufactured in ISO/TS 16949 certified sites with the highest production standards, quality and reliability. Each module is fully tested and inspected during production.