SARA-R4 - Size-optimised LTE Cat M1 modules

The SARA-R4 module series is available in variants to support single and quad-band LTE-FDD Cat M1 operation in the world's smallest LTE Cat M1 LGA package.

The modules offer low power consumption by utilizing the features of Power Save Mode (PSM) and Extended Discontinuous Reception (eDRX). Both of these features together can extend battery life to 10 years, depending on use case.

SARA-R4 features Coverage Enhancement, which provides better indoor service to reach beyond thick walls and into basements. LTE Cat M1 provides 15 dB coverage enhancement compared to GSM.

With many interface options and an integrated IP stack, the SARA-R4 modules are targeted to a wide range of data-centric applications. Due to the unique combination of performance, security and flexibility, these modules are ideal for M2M applications, such as smart metering, smart energy gateways, telematics/asset tracking, remote monitoring and telehealth.

SARA-R4 modules target high volume, cost sensitive applications, and provide communication functionality while minimizing your total cost of ownership.

Key features:

  • Multi‑regional configurability with single hardware SKU
  • Low power consumption and longer battery life
  • Extended range in buildings and basements
  • Easy migration between u‑blox 2G, 3G and 4G modules
  • Deliver critical firmware updates via uFOTA with LWM2M

For sales and technical development support from our in-house engineering team, please contact the Alpha Micro team.

Parameters Specifications

3GPP Release 13


  • Cat M1 Half-duplex (375 kb/s DL and UL)
  • FDD Band: 13 for USA


  • Cat M1 Half-duplex (375 kb/s DL and UL)
  • FDD Bands: 2, 4, 5, 12 for N. America


  • Cat M1 Half-duplex (375 kb/s DL and UL)
  • FDD Bands: 3, 5, 8, 28 for ANZ, S. America

MT/MO PDU / Text mode




Codec: AMR-NB

Electrical data
Power supply 3.80 V nominal, range 3.3 V to 4.3 V
Power consumption

Power Save Mode 8 μA

Active Mode 8 mA

LTE connected mode

0 dBm 105 mA

12 dBm 115 mA

18 dBm 120 mA

Max power 125 mA

Software features

Dual stack IPv4 and IPv6


Embedded HTTPS, SFTP, TLS¹

Device management OMA LWM2M
Network Jamming detection¹
GNSS Interfaces¹

Direct access to u-blox GNSS via module

AssistNow software for fastest GPS Time-To-First-Fix

CellLocate® & Hybrid Positioning

Firmware upgrade


FOTA client (FW upgrade Over the Air)




1 USB 2.0 (high-speed, 480 Mb/s)

1 SDIO (Master)¹

1 DDC (I²C)¹

1 SPI¹


Up to 6 GPIO's, configurable


Supports 1.8 V and 3 V, SIM toolkit¹


96 pin LGA: 16.0 x 26.0 x 2.4 mm, < 3 g

Environmental data, quality & reliability

Operating temperature -40°C to +85°C
RoHS compliant (lead free)
Qualification according to ISO 16750
Manufactured in ISO/TS 16949 certified production sites
Certifications and approvals
SARA-R404M FCC, ISED (formerly known as IC), Verizon, GCF (planned)

FCC, RCM, GCF (planned), PTCRB, AT&T, T-Mobile, Verizon (planned), ISED (formerly known as IC), RED (formerly known as R&TTE)

¹ Available in future FW version


Click here for the u-blox cellular modules linecard.

Part No. Description Pack size
SARA-R404M LTE-only module; Single-band
Reel of 250
SARA-R410M-01B LTE module for North America (AT&T); Cat M1; Bands 2, 4, 5, 12
Reel of 250
SARA-R410M-11B LTE module for ANZ and S. America; Cat M1; Bands 3, 5, 8, 28
Reel of 250
EVK-R404M Evaluation kit for SARA-R404M Each
EVK-R410M Evaluation kit for SARA-R410M Each

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Last updated: 17 November 2017