55557 Vertical 4.2mm Pitch Wire-to-Board Connector Double Row Straight Pin Buckle
Product Highlights
✅ Pitch: 4.2mm, Double Row, Vertical Straight Pin Wire-to-Board Connector
✅ UL94V-0 Flame Retardant Housing, Halogen-Free for industrial & home appliances
✅ Anti-vibration locking buckle: Prevents accidental un-mating under continuous shock & vibration (industrial / vehicle harsh environment)
✅ Complete set available: Matching Housing + Crimp Terminals supplied together
Technical Specifications
| Item |
Details |
| Electrical Performance |
Rated Current: 5A max per circuit
Rated Voltage: 250V AC
Contact Resistance: ≤20mΩ
Insulation Resistance: ≥1000MΩ
Withstand Voltage: 1500V AC for 1min |
| Mechanical Performance |
Pitch: 4.2mm
Arrangement: Double Row, Vertical Straight Pin
Mating Cycles: ≥100 times
Retention: Lock buckle design, anti-unmating under vibration
Insertion/Withdrawal Force: Normal, no excessive wear |
| Material & Plating |
Housing: Nylon, UL94V-0, Halogen-Free
Contact Terminal: Copper Alloy
Plating: Tin plating (Au plating optional) |
| Environmental |
Operating Temp: -40℃ ~ +105℃
RoHS compliant |
| Soldering Guide |
Reflow soldering: Max 260℃, 10s max
Hand soldering: 320℃ max within 3s |
Cross Reference / Alternative Replacement
Direct alternative to famous international connector brands:
- JST: XH series
- Molex: 55557 series
- TE (AMP): Equivalent 4.2mm double row vertical wireboard series
Product Features
- 4.2mm pitch double row vertical straight pin structure, compact PCB footprint
- Built-in secure buckle, anti-disengagement under vibration
- Halogen-free UL94V-0 nylon insulator
- Complete solution: housing + terminals one-stop procurement
- Stable tin-plated contact, low contact resistance
Product Advantages
- Anti-vibration locking buckle solves accidental un-mating pain point for industrial & on-board equipment
- High flame retardant + halogen-free, meets strict green & safety standards
- Interchangeable with JST/Molex/TE 4.2mm series, easy drop-in replacement without PCB redesign
- Stable electrical performance under a wide temperature range
- Factory direct supply, flexible custom service available
Application
- Industrial control equipment
- Home appliances (refrigerator, washing machine, air conditioner)
- Automotive auxiliary electronics, vehicle interior modules
- Power supply & UPS
- LED lighting drivers
- Medical & measuring instruments
Packaging Method
- Standard: Anti-static bag packing
- Optional: White / Neutral carton box packing. Custom packing label & barcodes available upon request.
Payment Method
EXW, FOB, CIF, CPT, T/T, L/C available
Lead Time
- Samples: 3 working days
- Mass order: 1–2 weeks
Factory Certificate & Custom Service
- Certifications: UL, RoHS, REACH, ISO9001
- MOQ: Low MOQ for standard items
- Sample Policy: Free samples available / Fast sample delivery.
- Custom service: Custom pin count, plating thickness, cable harness assembly, special packaging & marking.
Customer Selection Guide
- Confirm pin count & PCB mounting direction: Vertical straight pin
- Verify working current, voltage, and temperature range
- For high vibration scenario: Must use buckle version to avoid un-mating
- Green material requirement: Select Halogen-Free + UL94V-0 housing
- Cross-check: Direct substitute for Molex 55557 / JST XH / TE equivalent 4.2mm connectors; verify pin assignment before replacement
- Soldering: Follow reflow temperature profile strictly to prevent housing melting
FAQ
1. Q: Do you have a catalogue? Can you send me the catalogue to check all your products?
A: Yes, you can contact us online or send an Email to get the catalogue.
2. Q: I can't find the product in your catalogue. Can you make this product for me?
A: Our catalogue shows most of our products, but not all. Just let us know what product you need, and how many you want. If we do not have it, we can also design and make a new mould to produce it. For your reference, making an ordinary mould will take about35-45 days.
3. Q: Can you provide a sample? Are these samples free?
A: Yes, we provide 5-10 pcs of connector free samples for testing. But you have to pay the shipping cost
4. Q: What about your delivery time?
A: Stock goods are delivered within 1 day; customized goods are delivered within 5-7days
5. Q: How to ship my order?
A: For small packages, send them by Express, such as DHL, FedEx, UPS, TNT, EMS. That's Door-to-Door service. For big packages, we can send them by Air or by sea. We use standard export cartons. We are responsible for any product damage caused during delivery.
6. Q: What kind of payment do you accept? Can I pay RMB?
A: Weaccept T/T(Wire transfer), Western Union, and PayPal. Please make sure that we can receive the same amount as the Invoice. And you can pay in RMB. No problem.
7. Q: How about your company's quality control
A: Strictly follow ISO9001. IQC, OQC, IPQC, and QA account for 10% of our staff. All of our products will be tested by CCD.
8. Q: I need your price list of all your products. Do you have a price list?
A: We do not have a price list of all of our products. Because we have so many items, it's impossible to list all prices, and prices change based on material costs and quantity. And you can give us a list of all of the items you need; we will confirm carefully one by one and give you a specification and price list
9. Q: Can you make customized products and customized packing?
A: Yes. We have made a lot of customized
products for our customers formerly (mainly wire harnesses). About customized packing, there is no problem; we can put your logo or other information on the package. Just have to point out that it incurs additional cost.
10. Q: What certificates do you have?
A: CE, CQC, UL, ISO9001, ISO14001, IATF16949, ISO45001, QC080000, etc.
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