What is the difference between S( )B-XH-A and S( )B-XH-A-1?

In the part number, replace ( ) with the applicable number of circuits / positions.

The difference is the solder tail extension from the back edge of the header wall. Please refer to following diagram from the web site data sheet.

What is the strip length of contact SVH-21T-P1.1?

The strip length is 3.0mm to 3.5mm (0.118" to 0.138").

What is the strip length of contact SVH-41T-P1.1?

The strip length is 3.0mm to 3.5mm (0.118" to 0.138").

What is a "boss"?

Used on surface mount, through-hole headers and board-in connectors, a "boss" is a peg on the bottom of a header that helps polarize and situate the product onto the PCB.

For polarization, the boss allows the user to orient the product onto the PCB in only one direction. They are also used to help steady surface mount headers before subjecting them to IR reflow.

An extra hole is required to be drilled /punched into the PCB when incorporating items with bosses though the boss typically will not penetrate completely through the PCB like a through-hole solder tail would.

What is the storage temperature for the XA series headers?

RE: BM*B-XASS-TF(LF)(SN)

The recommended storage temperature range is +5C to +35C. The recommended maximum storage humidity is 60%.

What is the storage temperature for the ZH / ZR series headers?

RE: B*B-ZR-SM4-*-TF(LF)(SN)

The recommended storage temperature range is +5C to +35C. The recommended maximum storage humidity is 60%.

What is the storage temperature for the GH series headers?

RE: BM*B-GHS-TBT(LF)(SN)

The recommended storage temperature range is +5C to +35C. The recommended maximum storage humidity is 60%.