LSHM-120-03.0-L-DV-A-S-K-TR SAMTEC Connector (Other) In Stock
SAMTEC LSHM-120-03.0-L-DV-A-S-K-TR is a 40-position shielded dual-row board stacking socket connector with 0.50 mm pitch and 3.0 mm stack height, featuring a peg mounting option. Body length is 0.579 inch. From $6.80 in stock worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Category
- Connector
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Shielded (-S) construction with metal shell providing EMI containment for high-speed signals up to 25 Gbps in compact board-to-board stacking applications
- 3.0 mm fixed stack height enabling precise board-to-board spacing in multilayer system assemblies such as DIMM-style memory modules and high-speed mezzanine cards
- Peg (PEG) board mounting option providing mechanical retention and alignment before soldering, reducing skew and improving yield in automated SMT assembly
Applications
The LSHM-120-03.0-L-DV-A-S-K-TR is used in high-speed board stacking applications including 5G radio front-end modules, PCIe Gen 4 mezzanine cards, and high-density compute blade interconnects where EMI shielding and a 3.0 mm controlled stack height are required. Its shielded socket design ensures signal integrity at data rates exceeding 10 Gbps per channel, making it suitable for backplane and mid-plane stacking in telecom switching equipment. The tape-and-reel packaging and SMT-compatible footprint support automated assembly of high-volume networking and storage subsystem boards.
Specifications
| Factory Lead Time | 1Week |
| YTEOL | 8.68 |
| Additional Feature | SHIELDED |
| Board Mounting Option | PEG |
| Body Breadth | 0.196inch |
| Body Depth | 0.175inch |
| Body Length | 0.579inch |
| Body/Shell Style | SOCKET |
| Connector Type | BOARD STACKING CONNECTOR |
| Contact Finish Mating | NOT SPECIFIED |
| Contact Finish Termination | Matte Tin (Sn) - with Nickel (Ni) barrier |
| Contact Gender | HERMAPHRODITIC |
| Contact Material | NOT SPECIFIED |
| Contact Pattern | RECTANGULAR |
| Contact Resistance | 15mΩ |
| Contact Style | BELLOWED TYPE |
| DIN Conformance | NO |
| Dielectric Withstanding Voltage | 470VAC V |
| Durability | 100Cycles |
| Filter Feature | NO |
| IEC Conformance | NO |
| Insulation Resistance | 1000000000Ω |
| Insulator Color | BLACK |
| Insulator Material | LIQUID CRYSTAL POLYMER |
| JESD-609 Code | e3 |
| MIL Conformance | NO |
| Mating Contact Pitch | 0.02inch |
| Mating Information | MULTIPLE MATING PARTS AVAILABLE |
| Mixed Contacts | NO |
| Mounting Option 1 | LOCKING |
| Mounting Style | STRAIGHT |
| Mounting Type | BOARD |
| Number Of Connectors | ONE |
| Number Of PCB Rows | 2 |
| Number of Rows Loaded | 2 |
| Option | GENERAL PURPOSE |
| PCB Contact Pattern | RECTANGULAR |
| PCB Contact Row Spacing | 3.7mm |
| Plating Thickness | 10u inch |
| Polarization Key | POLARIZED HOUSING |
| Rated Current (Signal) | 2A |
| Reference Standard | UL |
| Terminal Pitch | 0.5mm |
| Termination Type | SURFACE MOUNT |
| Total Number of Contacts | 40 |
| UL Flammability Code | 94V-0 |
| Withdrawl Force-Min | 2.22N |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8536.69.40.40 |
| Country of Origin | Costa Rica, USA |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What stack height does the LSHM-120-03.0-L-DV-A-S-K-TR provide between stacked boards and how is it achieved?
The 03.0 in the part number designates a fixed 3.0 mm board-to-board stack height. This is achieved by a precisely molded socket body of 0.175 inch depth combined with a matching male pin header of complementary height, so when mated, the two PCB surfaces are separated by exactly 3.0 mm. This controlled spacing is critical for thermal management and mechanical clearance in compact stacked assemblies.
How does the shielded (-S) design of the LSHM-120-03.0-L-DV-A-S-K-TR protect high-speed differential signals from EMI in dense PCB assemblies?
The integral metal shield surrounds the contact array and connects to the PCB ground plane through the board-mounting peg and shield tabs, providing greater than 30 dB of EMI attenuation at frequencies up to 6 GHz. This is essential when routing differential pairs such as USB 3.2, PCIe Gen 3, or 10 Gbps Ethernet through a board stacking connector in a chassis with multiple high-speed buses in close proximity.
For what signal speeds is the LSHM-120-03.0-L-DV-A-S-K-TR rated and which high-speed interface standards does it support?
The LSHM series is rated for signal speeds up to 25 Gbps per differential pair, supporting USB 3.2 Gen 2x2 at 20 Gbps, PCIe Gen 4 at 16 GT/s, and 25G Ethernet. With 40 positions in a dual-row 0.50 mm pitch socket, designers can route up to 8 differential pairs plus power and ground pins in a body length of just 0.579 inch, making it one of the highest-density shielded board stacking options in its size class.
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