
KSP-N51U
SKU: KSP-N51U
KSP-N51U is a compact LTE-M and NB-IoT module for embedded IoT products. Its PCB-level form factor and UART AT command interface allow a host microcontroller to add cellular connectivity without requiring a separate external modem.
Request Custom / Bulk QuoteIntroduction
KSP-N51U is a compact LTE-M and NB-IoT module for embedded IoT products. Its PCB-level form factor and UART AT command interface allow a host microcontroller to add cellular connectivity without requiring a separate external modem.
The module combines LTE-M and NB-IoT connectivity with GNSS positioning and application protocols including MQTT, CoAP, HTTP, and LwM2M. A U.FL antenna connector and 2.54 mm headers support practical integration into prototypes and production hardware.
Low-power PSM and DRX operation make KSP-N51U suitable for smart meters, industrial gateways, remote monitoring equipment, and connected assets that need long operating life.
Key Features
KSP-N51U combines cellular connectivity, positioning, embedded security, and MCU-friendly integration in a compact module.
LTE-M and NB-IoT
Cellular IoT connectivity for low-power, wide-area deployments.
Low-power Operation
Power consumption below 5 µA in PSM and DRX modes.
UART AT Control
Straightforward host integration through UART and AT commands.
Cloud Protocols
Supports MQTT, CoAP, HTTP, and LwM2M.
GNSS Positioning
Location support for mobile and remote IoT equipment.
Embedded Security
Arm TrustZone and CryptoCell 310 security capabilities.
MCU SDK Support
SDK support for ESP32, STM32, and nRF52 host platforms.
Why Choose KSP-N51U?
KSP-N51U is designed for teams that need to integrate cellular IoT directly into their own hardware while keeping the host application simple.
The module provides:
- 01Compact PCB-level integration
- 02UART-based host control
- 03U.FL external antenna connection
- 04Low-power PSM and DRX operation
- 05AT command and MCU SDK support
These capabilities make KSP-N51U a practical cellular building block for both rapid prototypes and purpose-built embedded products.
Typical Applications
KSP-N51U can be integrated into connected equipment that requires low-power cellular data transfer or GNSS positioning.
Smart meters
Remote utility data collection and device monitoring
Industrial gateways
Cellular backhaul for controllers and field equipment
Remote monitoring
Status and telemetry reporting from distributed installations
Development platforms
Cellular prototyping with ESP32, STM32, and nRF52 hosts
Asset and equipment monitoring
Connectivity and positioning for mobile or unattended assets
Its module format gives product teams control over enclosure, power, host processor, and application design while reusing a documented cellular interface.
KSP-N51U Wiki
Official KORLINX setup, network, data communication, and support documentation.
Overview
Product features, hardware specifications, interfaces, power consumption, and supported protocols.
View WikiQuick Start
Prepare the module, connect the antenna and host, and complete the initial setup.
View WikiNetwork Attach
Configure and verify LTE-M or NB-IoT network registration.
View WikiSend Data
Use the module to exchange application data over supported network protocols.
View WikiFAQ
Product support notes and frequently asked questions as they become available.
View WikiCustomer reviews
Customer Images / Videos
Customer reviews for KSP-N51U have not been published yet.
KSP-N51U resources
Additional product resources have not been published yet.
KSP-N51U videos
Product videos have not been published yet.
Technical summary
KSP-N51U specifications
Technical information summarized from the official KORLINX Wiki overview.
- Product type
- Internal industrial cellular module
- Cellular networks
- LTE-M and NB-IoT
- Processor
- 64 MHz Arm Cortex-M33
- Memory
- 1 MB flash, 256 KB RAM, 4 MB external flash
- Maximum data rate
- Up to 375 kbps on LTE Cat-M1
- Maximum transmit power
- Up to +23 dBm on LTE-M
- Frequency range
- 700–2200 MHz
- Protocols
- MQTT, CoAP, HTTP, LwM2M
- Host interface
- UART with AT commands
- Host SDKs
- ESP32, STM32, nRF52
- Positioning
- GNSS supported
- SIM
- Nano USIM; Global and KT variants
- Security
- Arm TrustZone and CryptoCell 310
- Input power
- 3.3–5 V DC
- Antenna connector
- U.FL
- Board connector
- 2.54 mm header
- Dimensions
- 21 × 34 × 1.0 mm, PCB only
- LTE-M transmit current
- Approximately 120 mA average; varies by operating conditions
- PSM / DRX current
- Below 5 µA













