Surface Mount Technology SMT (SMD) Attachment Sturdiness

SMT orientation sturdiness is determined by many factors including the solder joint's ability to resist applied forces.

Vertical screw orientation increases torque shear greatly over horizontal screw axis. This works well since the soldered interface is in rotary shear which is strong. Essentially all of the solder at the periphery of the interface is collectively resisting shearing and quite high numbers are possible.   For more information on how torsional and rotary shear and smt pcb orientation affect solder joint integrity see SMT Power Connector Insights.

Before purchasing any SMT connectors please read these important precautions and limitations:

Precautions for SMT High Current Applications

Surface Mount Technology FAQ

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Search By PCB Body Type

B12-NM-SMT | B10-PCB | B10-PCB-RLM | B6A-PCB | B6A-PCB-RLM

B6A-PCB-45 | B6A-PCB-45-RLM | B4A-PCB | B4A-PCB-RLM

B4A-PCB-45 | B4A-PCB-45-RLM | P4-SMT

The following diagrams illustrate multiple SMT orientations for each SMT capable PCB part. Please note that in all solderable components a through hole (THT) connection is always more secure than just an SMT soldered connection.

SMT Surface Mount Technology Options:

Figure 1: Most Sturdy: Vertical screw and horizontal wire.

Figure 2: Less Sturdy: Horizontal screw and horizontal wire. Best for factory wiring only.

Products that allow SMT orientations: B12-NM-SMT, B12-NM-SMT-RLM-KIT*, and B12-NM-SMT-N66-KIT

*In Figure 2 orientation, when using a headed screw or ring lug and bolt it's recommended that the head of the screw hangs off the edge of the board. Screws with little or no clearance between the head of the screw and the board can result in mechanical and electrical fouling.

THT Through Hole Technology Option:

This part does not have a THT option. To see a similar part with THT capabilities view the B12-PCB products on the THT product page. The THT B12 Products do not have solderable tin plating and cannot be interchangeably used for SMT and THT. Only use B12-NM-SMT products for SMT purposes.

B10-PCB SMT Orientations

SMT Surface Mount Technology Options:

Figure 2: Less Sturdy: Horizontal screw and horizontal wire. Best for factory wiring only.

Figure 3: Least Sturdy: Horizontal screw and vertical wire. Best for factory wiring only.

Products that allow SMT orientations: B10-PCB* and B10-PCB-HEX

*In Figure 2 and 3 orientation, when using a headed screw or ring lug and bolt it's recommended that the head of the screw hangs off the edge of the board. Screws with little or no clearance between the head of the screw and the board can result in mechanical and electrical fouling.

THT Through Hole Technology Option:

B10 THT Footprint

Products that allow THT orientation: B10-PCB and B10-PCB-HEX

Ring Lug Mount B10-PCB-RLM SMT Orientations

SMT Surface Mount Technology Options:

Figure 2: Less Sturdy: Horizontal screw and horizontal ring lug mount. Best for factory wiring only.

Figure 3: Least Sturdy: Horizontal screw and and horizontal ring lug mount. Best for factory wiring only.

Products that allow SMT orientations: B10-PCB-RLM-KIT* and B10-PCB-RLM-G-KIT*

*In Figure 2 and 3 orientation, when using a headed screw or ring lug and bolt it's recommended that the head of the screw hangs off the edge of the board. Screws with little or no clearance between the head of the screw and the board can result in mechanical and electrical fouling.

When tightening bolt, two wrenches should be used to avoid damaging SMT bond.

THT Through Hole Technology Option:

B10 THT Footprint

Products that allow THT orientation:B10-PCB-RLM-KIT and B10-PCB-RLM-G-KIT

B6A-PCB SMT Orientations

SMT Surface Mount Technology Options:

Figure 2: Less Sturdy: Horizontal screw and horizontal wire. Best for factory wiring only.

Figure 3: Least Sturdy: Horizontal screw and vertical wire. Best for factory wiring only.

Addtional Notes -

Note 1: Due to peel off torque limitations, wire size and torque may be limited to 8 AWG maximum.

Note 2: When tightening bolt, two wrenches should be used to avoid damaging SMT bond.

Products that allow SMT orientations: B6A-PCB, B6A-PCB-SS, B6A-PCB-HEX, B6A-PCB-HEX-M, B6A-PCB-RS*, and B6A-PCB-RS-NS

*In Figure 2 and 3 orientation, when using a headed screw or ring lug and bolt it's recommended that the head of the screw hangs off the edge of the board. Screws with little or no clearance between the head of the screw and the board can result in mechanical and electrical fouling.

THT Through Hole Technology Option:

B6A THT Footprint

Products that allow THT orientation: B6A-PCB, B6A-PCB-SS, B6A-PCB-HEX, B6A-PCB-HEX-M, B6A-PCB-RS, and B6A-PCB-RS-NS

Ring Lug Mount B6A-PCB-RLM SMT Orientations

SMT Surface Mount Technology Options:

Figure 2: Less Sturdy: Horizontal screw and horizontal wire. Best for factory wiring only.

Figure 3: Least Sturdy: Horizontal screw and vertical wire. Best for factory wiring only.

Addtional Notes -

Note 1: Due to peel off torque limitations, wire size and torque may be limited to 8 AWG maximum.

Note 2: When tightening bolt, two wrenches should be used to avoid damaging SMT bond.

Products that allow SMT orientations: B6A-PCB-RLM-KIT*, B6A-PCB-RLM-12W-KIT*, and B6A-PCB-2RLM-KIT*

*In Figure 2 and 3 orientation, when using a headed screw or ring lug and bolt it's recommended that the head of the screw hangs off the edge of the board. Screws with little or no clearance between the head of the screw and the board can result in mechanical and electrical fouling.

THT Through Hole Technology Option:

B6A THT Footprint

Products that allow THT orientation: B6A-PCB-RLM-KIT, B6A-PCB-RLM-12W-KIT, and B6A-PCB-2RLM-KIT

SMT Surface Mount Technology Options:

Figure 2: Less Sturdy: Horizontal screw and horizontal wire. Best for factory wiring only.

Figure 3: Least Sturdy: Horizontal screw and vertical wire. Best for factory wiring only.

Products that allow SMT orientations: B6A-NH-PCB-RS-NS

*In Figure 2 and 3 orientation, when using a headed screw or ring lug and bolt it's recommended that the head of the screw hangs off the edge of the board. Screws with little or no clearance between the head of the screw and the board can result in mechanical and electrical fouling.

THT Through Hole Technology Option:

B6A THT Footprint

Products that allow THT orientation: B6A-NH-PCB-RS-NS

SMT Surface Mount Technology Options:

Figure 2: Less Sturdy: Horizontal screw and horizontal wire. Best for factory wiring only.

Figure 3: Least Sturdy: Horizontal screw and vertical wire. Best for factory wiring only.

Products that allow SMT orientations: B6A-NH-PCB-RLM-KIT* and B6A-NH-PCB-RLM-12W-KIT*

*In Figure 2 and 3 orientation, when using a headed screw or ring lug and bolt it's recommended that the head of the screw hangs off the edge of the board. Screws with little or no clearance between the head of the screw and the board can result in mechanical and electrical fouling.

When tightening bolt, two wrenches should be used to avoid damaging smt bond.

THT Through Hole Technology Option:

B6A THT Footprint

Products that allow THT orientation: B6A-NH-PCB-RLM-KIT* and B6A-NH-PCB-RLM-12W-KIT*

SMT Surface Mount Technology Options:

Figure 1: Most Sturdy: Vertical screw and horizontal wire

Figure 2: Less Sturdy: Horizontal screw and horizontal wire. Best for factory wiring only.

Figure 3: Least Sturdy: Horizontal screw and vertical wire. Best for factory wiring only.

Products that allow SMT orientations: B6A-PCB-45, B6A-PCB-45-HEX, B6A-PCB-45-HEX-M, and B6A-PCB-45-RS

*In Figure 2 and 3 orientation, when using a headed screw or ring lug and bolt it's recommended that the head of the screw hangs off the edge of the board. Screws with little or no clearance between the head of the screw and the board can result in mechanical and electrical fouling.

THT Through Hole Technology Option:

B6A THT Footprint

Products that allow THT orientation: B6A-PCB-45, B6A-PCB-45-HEX, B6A-PCB-45-HEX-M, and B6A-PCB-45-RS

SMT Surface Mount Technology Options:

Figure 1: Most Sturdy: Vertical screw and horizontal wire

Figure 2: Less Sturdy: Horizontal screw and horizontal wire. Best for factory wiring only.

Figure 3: Least Sturdy: Horizontal screw and vertical wire. Best for factory wiring only.

Products that allow SMT orientations: B6A-PCB-45-RLM and B6A-PCB-45-RLM-12W

*In Figure 2 and 3 orientation, when using a headed screw or ring lug and bolt it's recommended that the head of the screw hangs off the edge of the board. Screws with little or no clearance between the head of the screw and the board can result in mechanical and electrical fouling.

When tightening bolt, two wrenches should be used to avoid damaging smt bond.

THT Through Hole Technology Option:

B6A THT Footprint

Products that allow THT orientation: B6A-PCB-45-RLM-KIT and B6A-PCB-45-RLM-12W-KIT

SMT Surface Mount Technology Options:

Figure 2: Less Sturdy: Horizontal screw and horizontal wire. Best for factory wiring only.

Figure 3: Least Sturdy: Horizontal screw and vertical wire. Best for factory wiring only.

Products that allow these SMT orientations: B4A-PCB, B4A-PCB-HEX, B4A-PCB-HEX-M, B4A-PCB-RS*, and B4A-PCB-NS

*In Figure 2 and 3 orientation, when using a headed screw or ring lug and bolt it's recommended that the head of the screw hangs off the edge of the board. Screws with little or no clearance between the head of the screw and the board can result in mechanical and electrical fouling.

THT Through Hole Technology Option:

B4A THT Footprint

Products that allow THT orientation: B4A-PCB, B4A-PCB-HEX, B4A-PCB-HEX-M, B4A-PCB-RS, and B4A-PCB-NS

SMT Surface Mount Technology Options:

Figure 2: Less Sturdy: Horizontal screw and horizontal wire. Best for factory wiring only.

Figure 3: Least Sturdy: Horizontal screw and vertical wire. Best for factory wiring only.

Products that allow these SMT orientations: B4A-PCB-RLM-KIT*, B4A-PCB-RLM-12W-KIT*, and B4A-PCB-2RLM-KIT*

*In Figure 2 and 3 orientation, when using a headed screw or ring lug and bolt it's recommended that the head of the screw hangs off the edge of the board. Screws with little or no clearance between the head of the screw and the board can result in mechanical and electrical fouling.

When tightening bolt, two wrenches should be used to avoid damaging smt bond.

THT Through Hole Technology Option:

B4A THT Footprint

Products that allow THT orientation: B4A-PCB-RLM-KIT, B4A-PCB-RLM-12W-KIT, and B4A-PCB-2RLM-KIT

SMT Surface Mount Technology Options:

Figure 1: Most Sturdy: Vertical screw and horizontal wire

Figure 2: Less Sturdy: Horizontal screw and horizontal wire. Best for factory wiring only.

Figure 3: Least Sturdy: Horizontal screw and vertical wire. Best for factory wiring only.

Products that allow these SMT orientations: B4A-PCB-45, B4A-PCB-45-HEX, and B4A-PCB-45-RS*,

*In Figure 2 and 3 orientation, when using a headed screw or ring lug and bolt it's recommended that the head of the screw hangs off the edge of the board. Screws with little or no clearance between the head of the screw and the board can result in mechanical and electrical fouling.

THT Through Hole Technology Option:

B4A THT Footprint

Products that allow THT orientation: B4A-PCB-45, B4A-PCB-45-HEX, and B4A-PCB-45-RS

SMT Surface Mount Technology Options:

Figure 1: Most Sturdy: Vertical screw and horizontal wire

Figure 2: Less Sturdy: Horizontal screw and horizontal wire. Best for factory wiring only.

Products that allow these SMT orientations: B4A-PCB-45-RLM-KIT* and B4A-PCB-45-RLM-12W-KIT*

*In Figure 2 and 3 orientation, when using a headed screw or ring lug and bolt it's recommended that the head of the screw hangs off the edge of the board. Screws with little or no clearance between the head of the screw and the board can result in mechanical and electrical fouling.

When tightening bolt, two wrenches should be used to avoid damaging smt bond.

THT Through Hole Technology Option:

B4A THT Footprint

Products that allow THT orientation: B4A-PCB-45-RLM-KIT and B4A-PCB-45-RLM-12W-KIT

SMT Surface Mount Technology Options:

Figure 1: Most Sturdy: Vertical screw and horizontal wire.

Figure 2: Less Sturdy: Horizontal screw and horizontal wire. Best for factory wiring only.

Products that allow these SMT orientations: P4-SMT*

*In Figure 2 orientation, when using a headed screw or ring lug and bolt it's recommended that the head of the screw hangs off the edge of the board. Screws with little or no clearance between the head of the screw and the board can result in mechanical and electrical fouling.

THT Through Hole Technology Option:

This part does not have a THT option. Only use P4-SMT products for SMT purposes.