Bambu Lab TH Board FPC Cable for P2S – CAB045

The original Bambu Lab TH Board FPC Cable (CAB045 / CAB009) is a flat FPC cable designed to connect the Extruder Connection Board (front interface board) and the TH Board (rear board in the toolhead) in the Bambu Lab P2S printer. This cable transfers power and control data, and is therefore a key component for reliable operation of the toolhead.

Compatibility according to manufacturer: Bambu Lab P2S (TH Board FPC Cable, manufacturer no. CAB009 / CAB045).

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Main features

• Original Bambu Lab spare part
  Guaranteed compatibility and quality matching the factory configuration of the printer.
• Designed for P2S
  The cable is designed specifically for Bambu Lab P2S – ideal for a service stock for this printer.
• Power and data transfer in the toolhead
  The cable connects the interface board at the front of the print head with the TH Board at the back, ensuring power, sensor signals, and extruder control.
• Flexible FPC (Flexible Printed Circuit)
  Flat, highly flexible cable designed for repeated movement in the cable chain and the space around the X-axis.
• Reliable communication and stable printing
  High-quality signal routing reduces the risk of dropouts, sensor errors, and random print interruptions caused by poor contact.
• Easy replacement
  The cable is routed within the existing toolhead wiring and can be replaced following the Bambu Lab Wiki guide using common tools.

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When to replace the cable

Recommended replacement of the TH Board FPC cable especially in the following cases:

• repeated toolhead communication errors or unknown TH Board errors,
• random disconnection of the print head, dropouts during X-axis movement,
• visible damage to the flat cable (breaks, tears, scratches on the copper traces),
• problems with print stability after another mechanical failure or head collision.

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Technical parameters

Parameter	Value
Manufacturer	Bambu Lab
Product	TH Board FPC Cable
Manufacturer / catalog number	CAB045 (equivalent to CAB009 for P2S)
Cable type	FPC – Flexible Printed Circuit (flat flex cable)
Function	Transfer of power and data between the Extruder Connection Board and TH Board
Compatible printers	Bambu Lab P2S
Material	Metal conductors, plastic (polymer) carrier
Color	Black
Package contents	1× TH Board FPC cable
Approximate packaging weight*	approx. 0,02 kg (manufacturer data – packaging weight)
Approximate package dimensions*	approx. 60 × 60 × 30 mm

*The weight and dimensions are given for the spare part packaging from the manufacturer and serve as reference data for logistics.

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Benefits for Bambu Lab P2S users

• Prevention of unplanned downtime – having a spare TH Board FPC cable on hand pays off especially for printers used in a production environment.
• Maximum reliability – the original cable minimizes the risk of interference, data loss, or overheating caused by an unsuitable aftermarket part.
• Fast service – the simple design allows replacement as part of regular maintenance or during more extensive toolhead servicing.

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Installation and recommendations

• Always turn off the printer and disconnect the power before replacement.
• Handle the FPC cable carefully – do not fold it over sharp edges and do not bend it more than necessary.
• Make sure of correct insertion of the connectors (parallel, without skew) and full engagement of the locking latches.
• After assembly, we recommend running a toolhead test / self-test to verify correct communication and sensor operation.

This spare part is an ideal choice for anyone who wants to keep their Bambu Lab P2S in perfect technical condition and have the printer ready for long-term, trouble-free operation.

Key features:

• Original Bambu Lab FPC spare cable for P2S
• Provides power and data communication between the Extruder Connection Board and TH Board
• Flat, flexible FPC cable designed for movement in the toolhead
• Fully compatible with Bambu Lab P2S – ideal for service stock
• Simple replacement following the official Bambu Lab guide
• Suitable in case of toolhead communication faults or after mechanical damage to the cable