- Stock: 346
- Model: Resistencia 12V 50W
Model:
12V 40W
12V 50W
24V 40W
24V 50W
24V 60W
24V 70W
24V 80W
12 V, 50 W cylindrical heater cartridge for hotend blocks with a nominal 6 mm heater bore. It is intended for 12 V machines whose electronics, wiring and power supply can safely control its approximate 4.17 A current draw.
Compared with a 12 V, 40 W heater, this cartridge provides more power but increases nominal current from approximately 3.33 A to 4.17 A. It must not be installed as a direct upgrade without checking the complete electrical path.
Technical specifications
| Specification | Value |
|---|---|
| Rated voltage | 12 V DC |
| Rated power | 50 W |
| Cartridge dimensions | Ø6 × 20 mm |
| Cable length | Approximately 1 m |
| Declared conductor area | 0.5 mm² |
| Declared sheath material | 304 stainless steel |
| Calculated rated current | Approximately 4.17 A |
| Calculated nominal resistance | Approximately 2.88 Ω when cold |
The declared rating of up to 350 °C applies to the heater cartridge only. The complete hotend remains limited by its heater block, heatbreak, temperature sensor, wiring, firmware and nearby materials.
Compatibility
- V6, Volcano and derivative blocks with an actual Ø6 × 20 mm heater bore.
- 12 V systems prepared for a 50 W load and approximately 4.17 A.
- Hotends with an independent temperature sensor and secure cartridge retention.
Original Prusa MK2/S and MK2.5/S printers nominally use 12 V, 40 W heaters. This 50 W cartridge may share the physical format, but it must not be treated as a direct replacement without checking the controller, MOSFET, connectors, power supply and thermal configuration.
Never connect it to 24 V. A resistive cartridge designed for 12 V would dissipate approximately four times its nominal power at 24 V, creating a serious overheating and damage risk.
Installation and initial test
- Use a multimeter to confirm that the hotend supply is actually 12 V.
- Measure the cold, disconnected cartridge. A reading near 2.9 Ω helps identify the 12 V/50 W version.
- Confirm that the output, terminals, wiring and power supply can handle at least 4.17 A with a suitable margin.
- Insert the cartridge fully and secure it without deforming its sheath.
- Protect the wiring from movement, abrasion and direct contact with hot components.
- Verify the sensor and perform the first heating test under supervision using a low target temperature.
No printer-specific connector is included. Any connector or splice must be correctly crimped, insulated and rated for the current and toolhead temperature.
Firmware tuning
- Marlin: run
M303 E0 C8 S210 U1, adapting the target to normal use, followed byM500. For MPC, follow the relevant procedure, commonlyM306 T. - Klipper: run
PID_CALIBRATE HEATER=extruder TARGET=210, followed bySAVE_CONFIG. - RepRapFirmware: use
M303 H1 S210for a hotend configured as H1 and then incorporate the resultingM307parameters.
Keep thermal protection enabled and do not increase firmware temperature limits based solely on the heater-cartridge rating.
Related alternatives
- 12 V, 40 W heater cartridge, more suitable when the machine originally uses that power rating.
- 24 V, 50 W heater cartridge, exclusively for compatible 24 V systems.
Contents
- 1 × 12 V, 50 W heater cartridge.
