INDUSTRY COMPONENT

M.2 Slot

M.2 slot is a compact internal expansion interface on motherboards for connecting high-speed storage and communication devices.

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Component Specifications

Definition
The M.2 slot, formerly known as Next Generation Form Factor (NGFF), is a standardized internal expansion interface designed for motherboards and other computing devices. It supports multiple protocols including PCI Express (PCIe) and SATA, enabling direct connection of SSDs, Wi-Fi cards, Bluetooth modules, and other peripherals without cables. The interface features a compact form factor with keying notches (B-key, M-key, or B+M) that determine supported protocols and device types. M.2 slots support various lengths (2230, 2242, 2260, 2280, 22110) and widths, with thermal management considerations for high-performance devices.
Working Principle
The M.2 slot operates by providing direct electrical and mechanical connection between the motherboard and M.2 devices through edge connectors. It utilizes PCIe lanes for high-speed data transfer (up to PCIe 4.0 x4 or PCIe 5.0 x4) or SATA interface for compatibility with older standards. The slot's keying system prevents incompatible devices from being installed, while the screw mounting mechanism ensures secure physical attachment. Data transmission occurs through differential signaling pairs, with power delivery managed through the connector pins.
Materials
Gold-plated copper alloy contacts, FR-4 glass epoxy PCB substrate, phosphor bronze or beryllium copper spring contacts, nickel-plated steel mounting hardware, high-temperature resistant plastics for housing.
Technical Parameters
  • Width 22mm standard
  • Interface PCIe 3.0/4.0/5.0, SATA III, USB 3.0
  • Key Types B-key, M-key, B+M key
  • PCIe Lanes x2, x4
  • NVMe Support Yes
  • Maximum Speed Up to 16 GT/s (PCIe 5.0 x4)
  • Power Delivery 3.3V, up to 8.25W (2.5A)
  • Supported Lengths 2230, 2242, 2260, 2280, 22110 (mm)
  • Operating Temperature 0°C to 70°C
Standards
ISO/IEC 14776-153, PCI-SIG M.2 Specification, SATA-IO SATA Revision 3.0

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for M.2 Slot.

M.2 slot motherboard expansion NVMe SSD PCIe interface M.2 connector computer hardware storage interface industrial computing M.2 Slot in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Motherboards

The main printed circuit board (PCB) in a computer that connects and allows communication between all hardware components.

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Engineering Analysis

Risks & Mitigation
  • Incorrect device installation due to key mismatch
  • Thermal throttling from inadequate cooling
  • Electrical damage from static discharge
  • Mechanical damage from improper insertion force
  • Compatibility issues with older motherboard BIOS
FMEA Triads
Trigger: Incorrect key alignment during installation
Failure: Physical damage to connector pins, device not recognized
Mitigation: Implement visual key indicators, provide installation guides with clear orientation markings
Trigger: Inadequate thermal management for high-performance SSDs
Failure: Thermal throttling, reduced performance, premature device failure
Mitigation: Include thermal pads in design, implement motherboard heatsinks, provide airflow recommendations
Trigger: Static electricity during handling
Failure: Electrostatic discharge damage to sensitive components
Mitigation: Implement ESD protection circuits, provide anti-static handling procedures

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Pin alignment tolerance ±0.15mm, connector insertion force 30-50N, withdrawal force 10-30N
Test Method
PCI-SIG compliance testing, insertion/withdrawal cycle testing (minimum 50 cycles), thermal cycling testing (-40°C to 85°C), signal integrity testing with eye diagram analysis

Buyer Feedback

★★★★☆ 4.8 / 5.0 (33 reviews)

"Testing the M.2 Slot now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Computer, Electronic and Optical Product Manufacturing sector, I confirm this M.2 Slot meets all ISO standards."

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Frequently Asked Questions

What is the difference between B-key and M-key M.2 slots?

B-key slots (with notch at pin 12-19) typically support SATA and PCIe x2 interfaces, while M-key slots (notch at pin 59-66) support PCIe x4 interfaces. B+M key devices are compatible with both slot types but may have limited functionality.

Can I install any length M.2 device in any M.2 slot?

No, M.2 slots support specific device lengths (typically 2280). The motherboard must have appropriate mounting holes and clearance for the device length. Always check motherboard specifications for supported lengths.

Do all M.2 slots support NVMe SSDs?

Only M.2 slots with PCIe interface support NVMe SSDs. Some M.2 slots only support SATA interface, which cannot run NVMe drives. Check motherboard specifications for interface support.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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