DF40HC(2.5)-40DS-0.4V(58) Alternative | 0.4mm Pitch Female H2.5 BTB Connector
Core Highlights
✅ Mated Height Matrix: Flexible Stack Height Combination
Modular male & female pairing covers stacking height from 0.6 mm to 3.0 mm. One series supports multiple board gap designs, no extra new connector qualification.
✅ Blind Mating & Self-Alignment, Anti-Misalignment Design
Built-in guide grooves on both male & female housings. Compensates for assembly tolerance, solves engineer pain points:
- Dual board alignment difficulty
- SMT auto placement / manual assembly misalignment → pin damage & scrap
- Tolerance stacking risk in mass production
Macro close-up image: male + female guide groove structure
✅ High-Speed Signal Integrity
Supports 10Gbps / 16Gbps, PCIe 4.0. Controlled differential impedance, low insertion loss. Stable transmission for 5G modules & high-res cameras without signal attenuation.
Technical Specification Table
| Category |
Item |
Spec |
| Electrical |
Pitch |
0.4 mm |
|
Pin count |
40P (custom pin count available) |
|
Rated current |
0.3 A per pin |
|
Rated voltage |
30 V AC |
|
Contact resistance |
≤50 mΩ initial |
|
Insulation resistance |
≥1000 MΩ @ DC 250V |
|
Withstand voltage |
100 V AC, 1 min |
|
Max data rate |
16 Gbps, PCIe 4.0 compliant |
| Mechanical |
Mating cycles |
50 times minimum |
|
Self-alignment tolerance |
X/Y ±0.08 mm |
|
Mating / Unmating force |
Low insertion force design |
| Material & Plating |
Contact material |
Copper alloy |
|
Contact plating |
Gold plating on contact area, Ni underplate |
|
Solder tail plating |
Tin |
|
Housing |
LCP, UL94V-0 |
| Environment |
Operating temp |
-40 ℃ ~ +85 ℃ |
|
RoHS / REACH |
RoHS compliant, halogen-free |
| Soldering Guide |
Mounting |
SMT surface mount |
|
Reflow profile |
Peak 260 ℃, ≤10s |
Cross Reference | Compatible Replacement List
Direct drop-in replacement for Hirose DF40HC(2.5)-40DS-0.4V(58). Footprint compatible:
- JST: BM series 0.4mm BTB
- Molex: 504754 / 505470 series 0.4mm pitch BTB
- TE(AMP): 214270xx series 0.4mm fine pitch BTB
Same PCB footprint, no PCB re-spin required.
Product Feature
- 0.4mm ultra-fine pitch, high density, compact H2.5 stacked version
- Polarization anti-reverse key + guide groove dual anti-misalignment
- Optimized contact beam for low-loss, high-speed differential signal
- Halogen-free LCP housing, stable under reflow
- SMT tape & reel compatible for automatic placement
Product Advantages
- Solves mass production scrap from mis-mating & bent pins
- One series covers 0.6–3.0mm stacking height, reducing BOM part numbers
- Verified PCIe4.0 /16Gbps SI performance for high-speed camera & 5G
- Drop-in alternative to HRS / JST / Molex / TE, shorten lead time
- Stable gold plating, low contact resistance for long service life
Application
5G communication modules,
high-resolution camera modules,
portable IoT, industrial display,
AI edge computing board,
medical small module,
foldable device sub-board stacking.
Packaging
- Tape & reel (standard for SMT)
- Inner box + outer carton
Lead Time
- Samples: 3 working days
- Bulk Order: 1~3 weeks
- MOQ: Negotiable
- Free samples available; fast sample release support
Factory Certification & Custom Service
Certifications: ISO9001, ISO14001, RoHS, Halogen-free
MOQ: Low MOQ for standard parts
Sample Policy: Free samples available, fast sample delivery
Customization: Custom pin count, stacking height, gold plating thickness, floating version, shielded version.
Engineer Selection Guidance
- Confirm target stacking height → pick matched male/female from height matrix
- Confirm interface: PCIe4.0 / 10G high-speed → select this high-speed contact version
- If assembly tolerance is tight: choose blind mating self-alignment model
- Verify footprint against original HRS DF40HC drawing before layout
- Reflow: strictly follow 260℃ max peak; avoid overheating the housing
- For vibration-heavy applications: add locking version upon request
FAQ
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.
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 about 35-45 days.
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
Q: What about your delivery time?
A: Stock goods are delivered within 1 day; customized goods are delivered within 5-7days
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 will be 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 be sure that we can receive the same amount as the Invoice. And you can pay money in RMB. No problem.
7. Q: How about your company's quality control
A: Strictly follow ISO9001; IQC, OQC, IPQC, and QA occupy 10% of our Quality department. The CCD test is applied to 99% of our company's product applications.
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 make all of their prices on a list, and the prices are always changing because of the material cost 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
Q: Can you make customized products and customized packing?
A: Yes. We have made a lot of customized
products for our customers before (mainly wire harnesses). About customized packing, there is no problem; we can put your logo or other information on the packing. Just have to point out that it will cause some additional cost.
Q: What certificates do you have?
A: CE, CQC, UL, ISO9001, ISO14001, IATF16949, ISO45001, QC080000, etc.
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