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SARA-R4/N4 series

Size-optimized LTE Cat M1/NB1 and EGPRS modules

Ultra-compact LTE Cat M1 / NB1 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
  • Deliver critical firmware updates via uFOTA with LWM2M
  • Low power consumption and longer battery life
  • Extended range in buildings, basements, and with NB1, underground
  • Easy migration between u‑blox 2G, 3G and 4G modules

Product variants


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, 17, 18, 19 20, 26, 28


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


LTE module for multi-regional use; Cat NB1 deployed bands 2, 3, 4, 5, 8, 12, 13, 20, 28

Product variantsSARA-R410M-52BSARA-R410M-02BSARA-R412M-02BSARA-N410-02B
North America-
Cellular features 
LTE bands12, 2, 4, 5, 131, 12, 39, 2, 3, 4, 5, 8, 13, 17, 19, 20, 2812, 2, 3, 4, 5, 8, 13, 20, 28
Data ratesM1 (375 kbit/s DL and 300 kbit/s UL)M1 (375 kbit/s DL and 300 kbit/s UL), NB1 (27.2 kbit/s DL, 62.5 kbit/s UL)NB1 (27.2 kbit/s DL, 62.5 kbit/s UL)
GSM bandsQuad-band
Positioning (for CEL products)AssistNow, GNSS via Modem
DDC (I²C compliant)1
Environmental data, quality & reliability 
Size [mm]16 x 26 x 2.5
Antenna supervisor
Dual stack IPv4/IPv6
Embedded TCP/UDP
Embedded TLS 1.2
FOTA according to CTCC/CMCC
FW update via serial interface
Power Save Mode Rel.12
MarketsAutomotive & Transport, Industry, Smart Cities, Healthcare, Retail, Smart Home & Buildings

Data Sheet

SARA-R4/N4 Data Sheet


1.29 MB


u-blox Package Information Guide


2.55 MB

At 16 x 26 mm, the SARA‑R4/N4 series modules are among the world’s smallest LTE Cat M1 / NB1 and EGPRS multimode modules offered in a single hardware design. They have software‑based LTE band configuration, and come in an LGA package for easy manufacturing.
The SARA‑R410M, SARA‑R412M, and SARA‑N410 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 modules offer low power consumption by utilizing PSM and eDRX, which extend battery life to up to 10 years. Coverage enhancement reaches deeper into buildings and basements (and underground with NB1) with up to 15 dB improved MCL compared to GSM or Cat 1.
With many interface options and an integrated IP stack, the SARA‑R4/N4 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/N4 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.