M50-3900242 Harwin Connector (Other) In Stock
Harwin M50-3900242 is a 1.27mm pitch DIL horizontal throughboard pin header with 2+2 contacts and selective gold plus tin finish. Dual in-line receptacle construction with nickel barrier ensures reliable signal integrity in compact PCB-to-board assemblies. Available from stock with worldwide shipping.
- Manufacturer
- Harwin
- Package
- Other
- Pin Count
- 4
- Lifecycle
- ACTIVE
- Datasheet
- M50-3900242 Datasheet PDF
- Category
- Connector
- Temp Range
- -40.0°C to 105.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1.27mm (0.050 inch) pitch dual in-line layout delivers high-density throughboard pin header connections in a compact 2+2 contact footprint
- Selective gold and tin contact finish with nickel barrier combines reliable mating performance with cost-effective termination
- RoHS-compliant lead-free construction supports green manufacturing and meets global environmental compliance requirements
Applications
M50-3900242 is suited for compact board-to-board and throughboard interconnect applications including consumer electronics, handheld instruments, and small-form-factor embedded modules. Its horizontal DIL orientation and 1.27mm pitch make it ideal for designs where vertical clearance is limited and a 2+2 contact interface must be routed in minimum PCB real estate.
Specifications
| Pbfree Code | Yes |
| YTEOL | 9.15 |
| Additional Feature | ROHS COMPLIANT |
| Body Breadth | 0.134inch |
| Body Depth | 0.188inch |
| Body Length | 0.1inch |
| Body/Shell Style | RECEPTACLE |
| Connector Type | BOARD CONNECTOR |
| Contact Finish Mating | NOT APPLICABLE |
| Contact Finish Termination | Tin (Sn) - with Nickel (Ni) barrier |
| Contact Gender | MALE |
| Contact Material | NOT APPLICABLE |
| Contact Pattern | RECTANGULAR |
| Contact Resistance | 30mΩ |
| Contact Style | SQ PIN-SKT |
| DIN Conformance | NO |
| Dielectric Withstanding Voltage | 1000VAC V |
| Durability | 300Cycles |
| Filter Feature | NO |
| IEC Conformance | NO |
| Insulation Resistance | 5000000000Ω |
| Insulator Color | BLACK |
| Insulator Material | POLYAMIDE |
| JESD-609 Code | e3 |
| MIL Conformance | NO |
| Mating Contact Pitch | 0.05inch |
| Mating Contact Row Spacing | 0.05inch |
| Mixed Contacts | NO |
| Mounting Style | RIGHT ANGLE |
| 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 | 1.27mm |
| Rated Current (Signal) | 1A |
| Reference Standard | UL |
| Terminal Length | 0.079inch |
| Terminal Pitch | 1.27mm |
| Termination Type | SOLDER |
| Total Number of Contacts | 4 |
| UL Flammability Code | 94V-0 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8536.69.40.40 |
| Country of Origin | Taiwan |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the contact count and pitch of Harwin M50-3900242?
Harwin M50-3900242 is a 2+2 contact (4 total) dual in-line throughboard pin header with a 1.27mm (0.050 inch) pitch. This compact footprint allows tight board layouts where standard 2.54mm pitch headers would consume excessive PCB area in space-constrained designs.
What finish does M50-3900242 use and how does it affect connector performance?
M50-3900242 uses selective gold on mating contacts combined with tin finish on termination areas, with a nickel barrier layer underneath. The gold mating surface provides low contact resistance and consistent reliability over many mating cycles, while the tin termination supports standard reflow and wave soldering processes at up to 260°C.
Is M50-3900242 compatible with RoHS-compliant PCB assembly processes?
Yes, M50-3900242 is fully RoHS compliant and lead-free, with tin plus nickel termination suitable for lead-free soldering at standard reflow temperatures up to 260°C. The horizontal throughboard mounting style is compatible with wave soldering and selective soldering processes used in mainstream RoHS-compliant electronics production.
When is M50-3900242 preferred over larger pitch DIL headers for compact module designs?
M50-3900242 is preferred when board space is constrained and only 4 signals need to be routed between stacked boards. Its 1.27mm pitch reduces the footprint by approximately 50% compared to 2.54mm pitch alternatives, making it ideal for small embedded modules, handheld instruments, and PCB-to-PCB interconnects where every square millimeter of board area matters.
Related Guides
ECMF02-4CMX8 Common-Mode Filter with ESD Protection: Selection Guide
Compare ECMF02-4CMX8 vs ECMF02-2AMX6, ECMF04-4HSM10, and other ST ECMF filters. Choose the right 4-channel common-mode filter with ESD protection for USB 2.0.
Jun 20, 2026
AD5204 Quad Digital Potentiometer Selection Guide (2026)
How to choose the right AD5204 quad digital potentiometer: compare 10kΩ vs 100kΩ variants, TSSOP vs SOIC packages, and SPI interface options for your design.
Jun 20, 2026
0402 10uF X5R Decoupling Design Guide for Compact Digital Rails
Application note for using CL05A106MP5NUNC-class 0402 10uF X5R MLCCs in compact digital rail decoupling designs.
Jun 19, 2026
How to Choose an 0805 10uF MLCC for Decoupling and Bulk Capacitance
Selection guide for choosing 0805 10uF MLCCs around CL21A106KOQNNNE, covering derating, dielectric, package, and sourcing checks.
Jun 19, 2026
Why Buy from FindMyChip
About Harwin
Harwin is a leading electronic component manufacturer. FindMyChip sources Harwin ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”