8550-4500PL 3M Connector (Header, Receptacle - Straight PTH Box) In Stock
3M 8550-4500PL is a polarized straight PTH box receptacle board connector measuring 2.68 inch × 0.425 inch with gold-over-nickel contact finish on both mating and termination surfaces for reliable long-life signal connections. RoHS-compliant Pb-free construction supports through-hole wave solder assembly. From $5.40, in stock, worldwide shipping.
- Manufacturer
- 3M
- Package
- Header, Receptacle - Straight PTH Box
- Pin Count
- 50
- Lifecycle
- ACTIVE
- Datasheet
- 8550-4500PL Datasheet PDF
- Category
- Connector
- Temp Range
- -55.0°C to 105.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Polarized box socket design (2.68 in × 0.425 in body) physically prevents reverse mating in high pin-count board connector applications
- Gold (12 µin) over nickel (79 µin) contact finish on mating and termination surfaces delivers low and stable contact resistance across thousands of mating cycles
- Straight through-hole (PTH) termination with 9.1-year YTEOL ensures long-term supply availability for industrial and defense board connector assemblies
Applications
The 3M 8550-4500PL is designed for high pin-count board-to-cable and board-to-board signal interconnects in industrial automation, military electronics, and embedded computing platforms requiring mechanically robust, polarized connections. Its gold-plated contact finish and box socket housing make it suitable for test and measurement equipment where consistent low contact resistance across repeated mate/unmate cycles is critical. The straight PTH footprint integrates into standard wave-solder PCB production processes, supporting volume manufacturing of backplane interconnects and I/O interface modules.
Specifications
| Pbfree Code | Yes |
| YTEOL | 9.1 |
| Additional Feature | 3M, POLARIZED |
| Body Breadth | 0.24inch |
| Body Depth | 0.425inch |
| Body Length | 2.68inch |
| Body/Shell Style | SOCKET |
| Connector Type | BOARD CONNECTOR |
| Contact Finish Mating | GOLD (12) OVER NICKEL (79) |
| Contact Finish Termination | GOLD |
| Contact Gender | FEMALE |
| Contact Material | COPPER ALLOY |
| Contact Pattern | RECTANGULAR |
| Contact Style | SQ PIN-SKT |
| DIN Conformance | NO |
| Dielectric Withstanding Voltage | 1400VAC V |
| Filter Feature | NO |
| IEC Conformance | NO |
| Insulation Resistance | 1000000000Ω |
| Insulator Color | GRAY |
| Insulator Material | GLASS FILLED POLYBUTYLENE TEREPHTHALATE |
| JESD-609 Code | e4 |
| MIL Conformance | NO |
| Mating Contact Pitch | 0.1inch |
| Mating Contact Row Spacing | 0.1inch |
| 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 | 2.54mm |
| Plating Thickness | 12u inch |
| Polarization Key | POLARIZED HOUSING |
| Rated Current (Signal) | 1A |
| Reference Standard | UL |
| Terminal Length | 0.11inch |
| Terminal Pitch | 2.54mm |
| Termination Type | SOLDER |
| Total Number of Contacts | 50 |
| UL Flammability Code | 94V-0 |
| Package | Header, Receptacle - Straight PTH Box |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8536.69.40.40 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What contact plating specification does 3M 8550-4500PL use, and how does this affect insertion cycle life?
The 8550-4500PL uses gold (12 µin) over nickel (79 µin) on both mating and termination contacts; gold plating at 12 microinches thickness is sufficient for several hundred to over 1,000 mating cycles with stable contact resistance below 10 mΩ, making it appropriate for test equipment and field-service boards that require repeated connector disconnection.
How does the polarized housing of 8550-4500PL protect against mismating in multi-connector PCB assemblies?
The 8550-4500PL box socket incorporates a 3M polarization feature that physically blocks insertion of the mating header in any orientation other than the correct one, preventing reversed signal or power pin assignments across the connector's 2.68-inch body—essential protection in multi-connector backplane assemblies where an operator could otherwise swap identical-looking connectors between adjacent positions.
What through-hole assembly process is compatible with 8550-4500PL, and what PCB pad requirements does its 0.425-inch depth impose?
The 8550-4500PL uses straight PTH termination, compatible with standard wave solder processes at typical lead-free temperatures of 255–265°C; the 0.425-inch (10.8 mm) body depth determines the minimum keep-out zone below the connector on the PCB, requiring at least 11 mm of clear board depth beneath the mounting face for the through-hole pins plus solder fillet clearance.
For how many more years is 8550-4500PL expected to remain in production, and is it suitable for a 5-year industrial program?
The 8550-4500PL carries a YTEOL (years to end-of-life) estimate of 9.1 years, meaning it is expected to remain in active production until approximately 2035; this comfortably covers a 5-year industrial automation or defense program without requiring a mid-life connector change, and its Pb-free, RoHS-compliant body ensures regulatory compliance throughout that production window.
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