SEAM-20-09.0-S-04-2-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC SEAM-20-09.0-S-04-2-A-K-TR is a 20-position single-row board stacking connector with 9.0 mm stack height and 30 micro-inch gold over nickel contact finish. Features ELP and Final Inch technology for high-density memory module and mezzanine card applications. RoHS-compliant with tape-and-reel packaging and worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 80
- 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
- 9.0 mm fixed stack height enabling precise board-to-board spacing in multi-layer server and telecom mezzanine assemblies
- 30 micro-inch gold over 50 micro-inch nickel contact finish providing superior corrosion resistance and low contact resistance across thousands of mating cycles
- ELP (Eye of the Needle) press-fit and Final Inch high-speed signal integrity technologies supporting multi-gigabit data rates on stacked boards
- PEG board mounting option and SAMARRAY/SEARRAY compatibility for mechanically secure, high-density board stacking configurations
- Tape-and-reel (-TR) packaging with 1-week factory lead time enabling automated SMT assembly in high-volume production environments
Applications
The SEAM-20-09.0-S-04-2-A-K-TR is designed for high-speed mezzanine card interconnects in server blades, telecom line cards, and FPGA development platforms where a precise 9.0 mm stack height and 20-position signal density are required. Its Final Inch signal integrity technology supports multi-gigabit SerDes links across the board stack, making it suitable for PCIe, SATA, and custom high-speed protocols. Memory expansion modules and compute accelerator cards also use this connector family for reliable high-cycle board-to-board attachment.
Specifications
| Pbfree Code | Yes |
| Factory Lead Time | 1Week |
| YTEOL | 8.75 |
| Additional Feature | ELP; FINAL INCH; SAMARRAY; SEARRAY |
| Board Mounting Option | PEG |
| Body Breadth | 0.278inch |
| Body Depth | 0.496inch |
| Body Length | 1.196inch |
| Connector Type | BOARD STACKING CONNECTOR |
| Contact Finish Mating | GOLD (30) OVER NICKEL (50) |
| Contact Finish Termination | Tin (Sn) - with Nickel (Ni) barrier |
| Contact Gender | MALE |
| Contact Material | COPPER ALLOY |
| Contact Pattern | RECTANGULAR |
| Contact Style | CENTRONIC |
| DIN Conformance | NO |
| Filter Feature | NO |
| IEC Conformance | NO |
| Insulator Color | BLACK |
| JESD-609 Code | e3 |
| MIL Conformance | NO |
| Mating Contact Pitch | 0.05inch |
| Mating Information | MULTIPLE MATING PARTS AVAILABLE |
| Mixed Contacts | NO |
| Mounting Style | STRAIGHT |
| Mounting Type | BOARD |
| Number Of Connectors | ONE |
| Number Of PCB Rows | 4 |
| Number of Rows Loaded | 4 |
| Option | GENERAL PURPOSE |
| PCB Contact Pattern | RECTANGULAR |
| PCB Contact Row Spacing | 1.27mm |
| Plating Thickness | 30u inch |
| Rated Current (Signal) | 2.7A |
| Terminal Pitch | 1.27mm |
| Termination Type | SURFACE MOUNT |
| Total Number of Contacts | 80 |
| 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 SEAM-20-09.0-S-04-2-A-K-TR provide, and how does this affect PCB-to-PCB spacing in a server blade design?
The SEAM-20-09.0-S-04-2-A-K-TR provides a fixed 9.0 mm stack height, which sets the rigid separation between mated PCBs in a mezzanine assembly. This 9.0 mm gap must accommodate component clearances on both boards, including decoupling capacitors and power inductors that may stand 4 to 7 mm tall on typical 1.6 mm FR4 boards used in server blade designs.
How does the 30 micro-inch gold contact finish on the SEAM-20-09.0-S-04-2-A-K-TR compare to standard gold flash in terms of mating cycle durability?
The 30 micro-inch gold over 50 micro-inch nickel finish on this SAMTEC connector far outlasts gold flash (typically under 5 micro-inch), supporting over 200 mating cycles without significant contact resistance increase. This makes the SEAM-20-09.0-S-04-2-A-K-TR suitable for board stacking assemblies that are frequently disassembled for maintenance, upgrades, or field servicing, where gold flash contacts would wear through and cause intermittent signal loss.
Which high-speed interface protocols are supported by the Final Inch technology in this board stacking connector?
SAMTEC's Final Inch technology in the SEAM-20-09.0-S-04-2-A-K-TR is characterized to support signal rates up to 20+ Gbps per differential pair, covering PCIe Gen3, USB 3.1, SATA III at 6 Gbps, and custom serial links used in FPGA-to-FPGA board stacking. The controlled-impedance contact geometry maintains a consistent 50-ohm single-ended or 100-ohm differential impedance through the connector transition.
What is the body size of this 20-position stacking connector, and how many such connectors can be placed in a row on a standard 100 mm PCB edge?
The SEAM-20-09.0-S-04-2-A-K-TR body measures 1.196 inches (approximately 30.4 mm) in length, 0.496 inches (12.6 mm) in depth, and 0.278 inches (7.1 mm) in breadth. On a 100 mm PCB edge with standard clearance, approximately 3 of these 20-position connectors can be placed end-to-end, providing up to 60 stacking positions along that edge.
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