PRODUCT GUIDE
Board-to-Board Connectors (BTB)
CPT builds precision board-to-board connectors across the entire 0.175mm to 0.8mm pitch range on a single Insertmold platform, covering wearables, phones, camera modules, automotive ECUs and LiDAR.
Six pitch steps, one process platform
Selection always starts with pitch, then stack height, then pin count and rows, and finally whether the part must interoperate with an existing Japanese part number. CPT lines follow that order: 0.175mm four-row for the smallest footprint, 0.30 / 0.35mm for main-to-sub boards in phones and wearables, 0.40mm for high pin count stacking, 0.50mm for camera modules and industrial boards, and 0.80mm for 15mm ECU stacks.
All 198 catalogue part numbers can be searched online with datasheet PDF and 3D / 2D files available per part number.
Why the full Insertmold process
Full Insertmold means the plastic body and the terminals are over-moulded in one shot, so terminal position accuracy comes from the tool instead of downstream assembly. The practical result is stable volume production even at 0.175mm pitch, tight insertion-force distribution, and better SMT yield at the customer line.
Combined with mould-first / plate-later plating, only the contact area is plated and the plastic body never enters the plating bath. That removes plating tooling and assembly automation investment and shortens the path from tooling to first shipment.
Four-step selection
1) Pitch: back-calculate from the PCB area and pin count, 0.35mm is usually enough up to 60 pins. 2) Stack height: B118 covers 1.5–4.0mm in six steps, BB0098 reaches 15mm. 3) Pins and rows: four rows double the signal count in the same footprint. 4) Interoperability: use the cross-reference table to map an existing part number one to one.
Specifications
| Pitch | Series | Pins | Stack height | Typical use |
|---|---|---|---|---|
| 0.175mm | BB0088 four-row | 20 / 64 | 0.5mm | AI glasses, TWS earbuds, minimum footprint |
| 0.30mm | B43 / B26 | 4–78 | 0.6mm | Phone main-sub board, battery (12A) |
| 0.35mm | B09 / B30 | 6–60 | 0.6mm | Phones, wearables, camera modules |
| 0.40mm | B118 | 10–100 | 1.5–4.0mm | High pin count stacking, Raspberry Pi CM4/CM5 |
| 0.50mm | B104 | 10–80 | 3.0–5.0mm | Camera modules, industrial boards |
| 0.80mm | BB0098 | 60 | 15.0mm | ECU and industrial stacking |
FAQ
What is the finest pitch available?
0.175mm in a four-row construction, with 20 and 64 pin variants at 0.5mm mated height (BB0088 series).
How is the stack height chosen?
It follows the gap between the two PCBs. B118 uses a common plug plus height-graded receptacles to cover 1.5–4.0mm in six steps; BB0098 reaches 15mm.
Can CPT parts replace Japanese part numbers directly?
Yes. B09 maps to BK13C06, B118 to DF40 / DF40C and B104 to DF12, with footprints laid out for the corresponding series, so normally no board change is needed. We recommend a sample run to confirm insertion force and placement.
What are sample and small-volume lead times?
Tooled part numbers ship samples in 3–7 days; new tooling is typically 3–4 weeks to first sample.
Related
Send us your stack-up requirement
Share board thickness, available height, channel count and environment and we will recommend and quote within 24 hours.