M55-6028042R Harwin Connector (Other) In Stock
Harwin M55-6028042R is a female board stacking connector with phosphor bronze contacts, tin-over-nickel terminations, and a 2.2" body length designed for through-hole mounting in holes of 0.064 to 0.072 inch diameter. Delivers reliable board-to-board stacking with a 0.537" deep body for robust mechanical engagement. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Harwin
- Package
- Other
- Pin Count
- 84
- Lifecycle
- ACTIVE
- Datasheet
- M55-6028042R Datasheet PDF
- 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
- Phosphor bronze contacts with tin-over-nickel (Sn/Ni) terminations for reliable solderability and corrosion resistance
- Through-hole mounting compatible with 0.064 to 0.072 inch PCB holes enabling robust mechanical anchoring
- 2.2 inch body length accommodating multi-position board stacking configurations in rack and panel assemblies
- Female contact gender for secure plug-and-socket mating with Harwin M55-series male headers
Applications
The Harwin M55-6028042R is suited for backplane-to-daughter card stacking, industrial control racks, and data acquisition systems requiring reliable female connector interfaces with through-hole mechanical strength. Its 2.2" body length accommodates extended multi-position configurations in single-board computers and embedded systems that demand robust board-to-board connectivity. The phosphor bronze contacts and nickel-barrier tin terminations provide long-term reliability in environments with moderate vibration and humidity.
Specifications
| YTEOL | 8.75 |
| Board Mounting Option | HOLE .064-.072 |
| Body Breadth | 0.165inch |
| Body Depth | 0.537inch |
| Body Length | 2.2inch |
| Connector Type | BOARD STACKING CONNECTOR |
| Contact Finish Mating | NOT APPLICABLE |
| Contact Finish Termination | Tin (Sn) - with Nickel (Ni) barrier |
| Contact Gender | FEMALE |
| Contact Material | PHOSPHOR BRONZE |
| Contact Pattern | RECTANGULAR |
| Contact Resistance | 25mΩ |
| Contact Style | SQ PIN-SKT |
| Durability | 500Cycles |
| Filter Feature | NO |
| Insertion Force-Max | 0.8N |
| Insulation Resistance | 10000000000Ω |
| Insulator Material | LIQUID CRYSTAL POLYMER |
| JESD-609 Code | e3 |
| Mating Contact Pitch | 0.05inch |
| Mating Contact Row Spacing | 0.05inch |
| 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 | 5.5mm |
| Plating Thickness | 0.98u inch |
| Rated Current (Signal) | 1.2A |
| Reference Standard | UL |
| Terminal Pitch | 1.27mm |
| Termination Type | SURFACE MOUNT |
| Total Number of Contacts | 80 |
| UL Flammability Code | 94V-0 |
| Withdrawl Force-Min | 0.2N |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8536.69.40.40 |
| Country of Origin | Mainland China |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What PCB hole diameter does the Harwin M55-6028042R require for through-hole mounting?
The M55-6028042R is designed for PCB through-holes in the range of 0.064 to 0.072 inches (approximately 1.63 to 1.83 mm). This diameter range provides controlled fit for the tin-over-nickel terminated phosphor bronze contacts, ensuring adequate solder wicking into the annular ring during wave or hand soldering for a reliable mechanical and electrical joint.
How does the phosphor bronze contact material in M55-6028042R benefit long-term connector performance?
Phosphor bronze offers a tensile strength of approximately 500 to 700 MPa and an elastic modulus suited to maintaining contact spring force over thousands of mating cycles. In the M55-6028042R, this material resists stress relaxation at operating temperatures up to 105°C, preserving the contact normal force needed for low-resistance electrical connections in board stacking applications throughout the product's service life.
For a board-stacking design, how does the 2.2" body length of M55-6028042R affect connector selection?
The 2.2 inch (55.9 mm) body length of the M55-6028042R accommodates a large number of contact positions along a single PCB edge, reducing the need for multiple shorter connectors in parallel. For industrial backplane designs requiring 40 or more positions along a card edge, the extended body length simplifies PCB layout and ensures a single mechanical unit distributes mating forces evenly across all contacts during insertion.
Which Harwin header series mates with the M55-6028042R for a complete board stacking solution?
The M55-6028042R female connector mates with the corresponding Harwin M55 series male header pins sharing the same 0.165 inch body breadth and compatible contact pitch. The mated pair provides a complete board stacking solution with tin-over-nickel to phosphor bronze contact interface, typically rated for contact resistance below 30 milliohms and current capacity of 1 A per contact at ambient temperature.
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