SEAM-50-03.5-S-08-2-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC SEAM-50-03.5-S-08-2-A-K-TR is a 100-position single-row male board stacking connector with gold-over-nickel contact finish, 3.50 mm stacking height, and 8 mm post length. It features a copper alloy contact and peg board mounting option measuring 2.696 inches body length. Available from stock worldwide with fast shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 400
- 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
- 100-position single-row board stacking connector with 3.50 mm mating height enabling precise board-to-board stacking in multi-layer system assemblies
- Gold (30 µin) over nickel (50 µin) contact finish on copper alloy contacts provides superior corrosion resistance and low contact resistance for reliable high-cycle mating
- Peg board mounting option provides mechanical stability and alignment during soldering and board assembly, reducing connector movement and solder joint stress
- Tape-and-reel (TR) packaging and RoHS-compliant Pb-free construction support automated SMT assembly in high-volume production environments
Applications
The SEAM-50-03.5-S-08-2-A-K-TR is designed for high-density board stacking applications in telecommunications, networking equipment, and embedded computing platforms where precise inter-board spacing and high pin count connectivity are required. Its 100-position single-row configuration with 3.50 mm stacking height accommodates tightly spaced multi-board assemblies such as switch fabric cards, server mezzanine modules, and processor daughter boards. The gold contact finish ensures low-resistance electrical connections across all 100 positions even after repeated insertion cycles in field-serviceable systems.
Specifications
| Pbfree Code | Yes |
| YTEOL | 8.75 |
| Board Mounting Option | PEG |
| Body Breadth | 0.478inch |
| Body Depth | 0.28inch |
| Body Length | 2.696inch |
| Connector Type | BOARD STACKING CONNECTOR |
| Contact Finish Mating | GOLD (30) OVER NICKEL (50) |
| 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 |
| Insulator Material | LIQUID CRYSTAL POLYMER |
| MIL Conformance | NO |
| Mating Contact Pitch | 0.05inch |
| Mating Contact Row Spacing | 0.05inch |
| Mating Information | MULTIPLE MATING PARTS AVAILABLE |
| Mixed Contacts | NO |
| Mounting Option 1 | GUIDE POST |
| Mounting Option 2 | LOCKING |
| Mounting Style | STRAIGHT |
| Mounting Type | BOARD |
| Number Of Connectors | ONE |
| Number Of PCB Rows | 8 |
| Number of Rows Loaded | 8 |
| Option | GENERAL PURPOSE |
| PCB Contact Pattern | RECTANGULAR |
| PCB Contact Row Spacing | 1.27mm |
| Plating Thickness | 30u inch |
| Polarization Key | POLARIZED HOUSING |
| Rated Current (Signal) | 2.7A |
| Terminal Pitch | 1.27mm |
| Termination Type | SURFACE MOUNT |
| Total Number of Contacts | 400 |
| Withdrawl Force-Min | 2.224N |
| 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 stacking height and pin count does the SEAM-50-03.5-S-08-2-A-K-TR provide?
The SEAM-50-03.5-S-08-2-A-K-TR provides 100 positions in a single-row stacking configuration with a 3.50 mm stacking height and 8 mm post length. This precise stacking height ensures correct board separation in multi-board assemblies, maintaining signal integrity and mechanical clearance between stacked PCBs in compact computing and networking systems.
Why is gold-over-nickel contact finish significant for the SEAM-50-03.5-S-08-2-A-K-TR in high-cycle applications?
The 30 µin gold over 50 µin nickel contact finish on the SEAM-50-03.5-S-08-2-A-K-TR provides excellent oxidation resistance and maintains low contact resistance over many mating cycles compared to tin-finished contacts. Gold plating is particularly important in board stacking connectors for server and telecom equipment where connectors may be mated and unmated dozens of times during system integration, maintenance, or field upgrades.
How does the peg board mounting option on the SEAM-50-03.5-S-08-2-A-K-TR improve assembly reliability?
The peg mounting feature on the SEAM-50-03.5-S-08-2-A-K-TR physically anchors the connector body to the PCB before and during soldering, preventing movement and misalignment of the 100-position contact array. This is especially valuable for a 2.696-inch long connector where thermal expansion during reflow soldering could otherwise cause positional drift, resulting in solder bridges or insufficient solder joints across the full pin row.
In which multi-board system architectures is the SEAM-50-03.5-S-08-2-A-K-TR most commonly used?
The SEAM-50-03.5-S-08-2-A-K-TR is most commonly used in backplane-to-daughter-card interconnection in ATCA telecommunications systems, VME or VPX embedded computing backplanes, and server mezzanine card interfaces where a 3.50 mm board separation is required and 100 signals must be reliably routed between boards. Its single-row 2.696-inch body accommodates high signal counts in a narrow footprint suited to standard slot-pitch architectures in rack-mounted equipment.
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