The A4988 DRV8825 heatsink is a 9×9×12 mm aluminium heat sink designed to cool A4988 and DRV8825 stepper motor driver ICs on RAMPS boards and Arduino-based 3D printer controllers, preventing thermal shutdown during sustained high-current operation. Stepper driver ICs like the A4988 and DRV8825 generate significant heat above 0.8 A. Without cooling, thermal overload protection triggers at around 150 °C, shutting down the stepper and halting your print. This A4988 DRV8825 heatsink attaches with a self-adhesive thermal pad and fits precisely over the driver chip package. As a result, sustained high-current printing becomes reliable without active cooling in most printer enclosures. Key Features of the A4988 DRV8825 Heatsink Dimensions: 9 mm × 9 mm × 12 mm — sized for A4988 and DRV8825 chip footprints Aluminium with precision-cut fins for maximum surface area per footprint Self-adhesive thermal pad included — press-fit installation in seconds Suitable for A4988, DRV8825, TMC2208, and similar compact stepper drivers Also fits Raspberry Pi SoC, small ICs, memory chips, and transistors Prevents thermal shutdown during high-current stepper operation Use Cases Cooling A4988 or DRV8825 drivers on a RAMPS 1.4 or Arduino MEGA shield Raspberry Pi SoC and USB controller thermal management in passively cooled cases Any small IC, memory module, or transistor requiring compact passive cooling CNC and automation projects with continuously running stepper drivers Works Well With Nema17 Bipolar Stepper Motor 1.8° — the Nema17 stepper this driver typically controls in 3D printer and CNC builds Nema17 Stepper Heatsink — Black Anodised — a matching Nema17 body heatsink to cool the motor alongside the driver Project Ideas & Tutorials DRV8825 Stepper Motor Driver Arduino Tutorial — Last Minute Engineers — a thorough guide to wiring and cooling the DRV8825/A4988 on RAMPS and Arduino boards Motor Heat Sink: When and How to Add Cooling — Zbotic — explains when heatsinks are needed and how to attach them to motor drivers and ICs Package Contents 1 × 9×9×12 mm aluminium heatsink with self-adhesive thermal pad