Baseboard Management Controller (BMC)

Product Specifications

Technical details and manufacturing context for Baseboard Management Controller (BMC)

Definition

The Baseboard Management Controller (BMC) is a specialized microcontroller embedded on server motherboards. It provides out-of-band management, enabling administrators to monitor and control server hardware independently of the main operating system. This capability is critical for remote administration, especially when the host OS is unresponsive or the server is powered off. The BMC operates as an independent subsystem with its own processor, memory, and network interface. It communicates with onboard sensors and components via interfaces such as I²C, SMBus, or IPMI protocols. Through a network connection, it listens for management commands and provides real-time data on system health, power status, and environmental conditions. Typical functions include power cycling, hardware health monitoring, firmware updates, and console access. The BMC is a key component in the Management Node architecture, facilitating efficient data center operations. It is designed to operate within specified electrical and environmental parameters, including a supply voltage of 3.3 V DC ±5%, power consumption of 1.5–3.0 W, and an operating temperature range of 0–70 °C (industrial grade optional). Storage temperature ranges from -40 to 85 °C, and relative humidity (non-condensing) is 10–90%. The Ethernet interface supports 10/100/1000 Mbps with auto-negotiation per IEEE 802.3. I²C bus speed is 100–400 kHz (standard and fast mode). Flash memory size ranges from 32 to 128 MB for firmware and logs, and RAM size is 256–1024 MB (DDR3/DDR4). The BMC provides 16–32 configurable GPIO pins, 8–16 ADC channels with 12-bit resolution, and a programmable watchdog timer (1–255 seconds). Mean Time Between Failures (MTBF) is 100,000–200,000 hours at 25 °C. These values are reference ranges; actual specifications must be confirmed with the manufacturer for the specific model and application. The BMC is not a standalone product but a component integrated into server systems. It is not a safety device and does not replace the host system's management functions. For procurement, verify that the BMC meets the required standards and interfaces for your server platform.

Working Principle

The BMC operates independently with its own processor, memory, and network interface. It communicates with sensors and components on the motherboard via I²C, SMBus, or IPMI. When connected to a network, it listens for management commands and provides real-time monitoring data, enabling remote administration without physical access. It can power cycle the system, monitor health, update firmware, and provide console access even when the host OS is off.

Common Materials

Semiconductor silicon, Printed circuit board substrate, Copper traces

Technical Parameters

Parameter	Typical range	Notes & selection driver
Supply Voltage	3.3 ±5% V DC	Standard for BMC power rail
Power Consumption	1.5–3.0 W	Typical for BMC module
Operating Temperature	0–70 °C	Industrial grade optional
Storage Temperature	-40–85 °C	Non-operating
Relative Humidity	10–90 %	Non-condensing
Ethernet Interface Speed	10/100/1000 Mbps	Auto-negotiationIEEE 802.3
I2C Bus Speed	100–400 kHz	Standard and fast modeI2C
Flash Memory Size	32–128 MB	For firmware and logs
RAM Size	256–1024 MB	DDR3/DDR4
GPIO Pins	16–32 pins	Configurable
ADC Channels	8–16 channels	12-bit resolution
Watchdog Timer	1–255 s	Programmable timeout
MTBF	100000–200000 hours	At 25°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Embedded Processor
Executes BMC firmware and processes management commands

Material: Semiconductor silicon
Memory Module
Stores BMC firmware, configuration data, and temporary operational data

Material: Semiconductor silicon with metal interconnects
Network Interface Controller
Provides network connectivity for remote management access

Material: Semiconductor silicon
Sensor Interface Circuitry Part
Communicates with temperature, voltage, and fan sensors on the motherboard

Material: Semiconductor silicon with copper traces
Firmware
The management program the BMC processor executes independently of the host OS.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Baseboard Management Controller (BMC).

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Management Node

View system integration details

Manufacturers of Baseboard Management Controller (BMC)

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

TG-EP

Shenzhen, Guangdong, CN

Also makes: Emergency Power System, Supercapacitor, Human-Machine Interface and 1 more

Listed on the company's own website · profile compiled by CNFX from public sources

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Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

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Frequently Asked Questions

What is the primary function of a BMC?

The BMC provides out-of-band management, allowing remote monitoring and control of server hardware independent of the main OS. It enables power cycling, health monitoring, firmware updates, and console access even when the host system is off or unresponsive.

What interfaces does the BMC use to communicate with the motherboard?

The BMC communicates via I²C, SMBus, or IPMI protocols. These interfaces connect it to sensors and components for monitoring and control.

What are the typical electrical specifications for a BMC?

Typical supply voltage is 3.3 V DC ±5%, power consumption is 1.5–3.0 W, and operating temperature is 0–70 °C (industrial grade optional). Storage temperature is -40 to 85 °C, and relative humidity is 10–90% non-condensing.

How can I verify that a BMC meets my requirements?

Check the BMC's datasheet for exact values of supply voltage, power, temperature ranges, Ethernet speed, I²C speed, memory sizes, GPIO, ADC, watchdog timer, and MTBF. Confirm with the manufacturer that the BMC supports the required interfaces and standards for your server platform.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	N/A (electronic component, not fluid-handling)
other spec:	Humidity: 5% to 95% non-condensing, Power: 3.3V/5V/12V rails, Network: 10/100/1000BASE-T Ethernet
temperature:	0°C to 70°C (operational), -40°C to 85°C (storage)

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards