CROSS REFERENCE
DF40C Compatible 0.4mm Board-to-Board Connector (B118 / BB0118)
The B118 series maps to the DF40 / DF40C family: 0.4mm pitch, 10–100 pins, and six stack heights from 1.5mm to 4.0mm with a single common plug and height-graded receptacles.
How stack heights pair
One plug covers every height; the receptacle sets the stack. For example BB0118P20A pairs with BB0116R20A for a 2.5mm stack, and the same plug with BB0114R20A gives a different height. Choose the plug by pin count, then the receptacle by target stack height.
The six steps cover 1.5 / 2.0 / 2.5 / 3.0 / 3.5 / 4.0mm with 10 to 100 pins, the highest pin count in the CPT BTB range.
Relationship to DF40C
DF40C sits in the 0.4mm, 1.5mm-class DF40 family. B118 uses the same footprint and structural language across the whole family height range, so it maps directly at the DF40C position and extends upward to 4.0mm. Confirm plug versus receptacle, pin count and keying when substituting.
Typical applications
Main-to-sub boards in phones and tablets, smart watches, AI/AR glasses, Raspberry Pi CM4 / CM5 carrier boards (two 100-pin 0.4mm connectors), automotive camera modules and domain controllers. At 100 pins, review impedance and crosstalk and use ground pin placement to control return paths.
Specifications
| Stack | Plug (common) | Receptacle | Pins |
|---|---|---|---|
| 1.5mm | BB0118P{NN}A | BB0113R{NN}A | 10–100 |
| 2.0mm | BB0118P{NN}A | BB0114R{NN}A | 10–100 |
| 2.5mm | BB0118P{NN}A | BB0115R{NN}A | 10–100 |
| 3.0mm | BB0118P{NN}A | BB0116R{NN}A | 10–100 |
| 3.5mm | BB0118P{NN}A | BB0117R{NN}A | 10–100 |
| 4.0mm | BB0118P{NN}A | BB0118R{NN}A | 10–100 |
FAQ
What is the difference between DF40C and DF40?
Both belong to the 0.4mm DF40 family; the difference is the stack height step. B118 covers the family with one plug and six receptacles.
Is 100 pin available?
Yes, B118 covers 10–100 pins; 100 pin is a standard build with 3–7 day samples.
Can I buy only receptacles?
Either side can be supplied alone. Because one plug covers all heights, many customers stock one plug plus two receptacles.
What should I watch at 0.4mm and 100 pins?
Use a 0.10–0.12mm stencil with aperture pull-back, check coplanarity before reflow, and plan ground pins for return paths.
Send us your stack-up requirement
Share board thickness, available height, channel count and environment and we will recommend and quote within 24 hours.