A 45 W USB-powered soldering iron compatible with Weller RT Micro tips
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Recent Updates
- Dec 09, 2025 It's Shipping Time!
- Nov 24, 2025 Production Progress Report
- Oct 10, 2025 State of the Project Report - Firmware, Packaging, Compliance Testing, and More
- May 02, 2025 The Latest Design and Production News
Meet the Solder Ninja Pen — the ultimate USB-powered soldering iron for reliability and precision. Compatible with Weller’s extensive RT Micro tip catalog, it’s versatile enough for tasks ranging from large ground planes to submillimeter microsoldering. With hot-swappable tips, an adjustable temperature display, and a lightweight design, the Solder Ninja Pen is ideal for both professionals and hobbyists looking for portability without compromising quality.
Built for Reliability and Precision
Crafted from anodized, machined aluminum, the Solder Ninja Pen is built for durability. High-quality components, such as a tip connector rated for 5,000 cycles and a Würth Elektronik USB-C connector rated for 10,000 cycles, ensure long-lasting performance. The pen’s body design also provides mechanical stress relief, adding to its resilience.
Extensive Tip Compatibility
The Solder Ninja Pen is compatible with 24 Weller RT Micro tips, covering tasks from microsoldering to large copper planes. Each order includes a 1.3 × 0.4 mm chisel tip, suitable for most applications. Additional tips with different geometries and use cases can be purchased separately below. For the complete list, refer to the official Weller catalog.
Solder Anywhere, Anytime
The Solder Ninja Pen operates from 7.5 W (1.5 A @ 5 V) and can negotiate up to 45 W, making it compatible with various power sources, including wall chargers, power banks, and laptops. Solder wherever you are, without limitations.
Open Source
The Solder Ninja Pen is an open hardware device. Explore its schematics on GitHub.
Features & Specifications
- Enclosure: Anodized machined aluminum
- Microcontroller: Raspberry Pi RP2040
- Power: USB (BC, QC, PD) from 7.5 W to 45 W
- Temperature Range: 0-350 °C (400 °C boost)
- Heating Time: 5 seconds at 45 W (15 seconds at 15 W)
- Display: 0.69-inch monochrome 96 × 16 px OLED
- Interface: Configurable for right or left-handed use
- Buttons: Two buttons rated for 20,000 cycles
- Tip Connector: 3.5 mm jack from CUI rated for 5,000 cycles
- Power Connector: Würth Elektronik USB Type-C rated for 10,000 cycles
- Safety Features: Sleep on idle, sleep on magnet detected, lock on free fall
- Dimensions: 85 × 15 mm (160 × 15 mm with tip)
Product Comparisons
| Product | Solder Ninja Pen | Pine64 Pinecil V2 | Miniware TS80P | Miniware TS101 | iFixit Fixhub |
|---|---|---|---|---|---|
| Country of Origin | France | China | China | China | Unknown |
| Weight | 35 g | 28 g | 38 g | 33 g | 600 g |
| Power Range | 7.5 - 45 W | 36 - 60 W | 18 - 30 W | 9 - 90 W | 18 - 50 W |
| Working Voltage | 5 - 20 V | 5 - 20 V | 9 - 12 V | 9 - 28 V | 9 - 20 V |
| Compatible Chargers | BC 1.2, HVDCP (QC), PD | HVDCP (QC), PD | HVDCP (QC), PD | PD | PD |
| Temperature Range | 0 - 350 °C (400 °C boost) | 100 - 400 °C | 100 - 400 °C | 50 - 400 °C | 100 - 420 °C |
| Heat-up Time to 350 °C | 5 s | 6 s | 11 s | 15 s | 5 s |
| Tips | Plug-and-play, 24 options | Not plug-and-play, 9 options | Plug-and-play, 5 options | Not plug-and-play, 9 options | Plug-and-play, 7 options |
| Tip-to-grip Distance | Short (40 mm) | Medium (50 mm) | Medium (60 mm) | Long (70 mm) | Medium (50 mm) |
| Body | Aluminum | Plastic | Aluminum | Aluminum | Aluminum |
| Connectivity | USB Type-C with strain relief | USB Type-C, DC5525 | USB Type-C | USB Type-C, DC5525 | USB Type-C with proprietary cable |
| Cable | Yes | No | Yes | Yes | Yes, proprietary |
| Price in USD | $169 | $26 | $59 | $49 | $249 |
Support & Documentation
For questions about the Solder Ninja Pen, visit our dedicated channel on Discord.
Manufacturing Process
PCBWay manages the production and assembly of circuit boards. The body is machined from aluminum and anodized by a trusted supplier who delivered the first batch of pre-production units. Acrylic for the display window is provided by a separate supplier, and buttons are 3D-printed in resin. Packaging, designed for reuse as a carrying case, is produced by local company Durolle Emballage. All parts are shipped to France, where we assemble and test each unit.
In the Press
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Produced by Sitron Labs in Paris, France.
Sold and shipped by Crowd Supply.
Solder Ninja Pen
Comes with one soldering iron, one soldering iron tip (Weller RTM 013 S 1.3 x 0.4 mm chisel type), and one USB Type-C to USB Type-C cable (1.5 m), shipped in packaging that doubles as a storage container.
$169 $8 US Shipping / $18 Worldwide
In stock
Silicone USB Type-C Cable
Heat-resistent 1.5 m USB Type-C to USB Type-C silicone cable
$16 $8 US Shipping / $18 Worldwide
Orders placed now ship Jun 15, 2026.
RTM 002 C (conical, 0.2 mm diameter)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, conical-shaped soldering tip. Length: 19.0 mm, tip diameter: 0.2 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
RTM 002 C L (long conical, 0.2 mm diameter)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, long conical-shaped soldering tip. Length: 18.7 mm, tip diameter: 0.2 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
RTM 004 B (bevel cut, 0.4 mm diameter)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, 45° bevel cut-shaped soldering tip. Length: 18.5 mm, tip diameter: 0.4 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
RTM 004 S (chisel, 0.4 mm wide)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, chisel-shaped soldering tip. Length: 19.0 mm, tip cross section: 0.4 mm x 0.15 mm. Compatible with WMRP and WXMP soldering irons.
$58 $8 US Shipping / $18 Worldwide
In stock
RTM 008 C (conical, 0.8 mm diameter)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, conical-shaped soldering tip. Length: 18.0 mm, tip diameter: 0.8 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
RTM 008 S (chisel, 0.8 mm wide)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, chisel-shaped soldering tip. Length: 23.0 mm, tip cross section: 0.8 mm x 0.4 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
RTM 008 S X (angled chisel, 0.8 mm wide)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, chisel-shaped, bent (30°) soldering tip. Length: 23.0 mm, tip cross section: 0.8 mm x 0.4 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
RTM 010 S (chisel, 1.0 mm wide)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, chisel-shaped soldering tip. Length: 18.0 mm, tip cross section: 1.0 mm x 0.3 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
RTM 012 B (bevel cut, 1.2 mm diameter)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, 45° bevel cut-shaped soldering tip. Length: 18.0 mm, tip diameter: 1.2 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
RTM 013 S (chisel, 1.3 mm wide)
From the Weller RT Micro Soldering Tips project.
Each Solder Ninja Pen includes one piece of this tip.
Weller RT Micro 40 Watt, chisel-shaped soldering tip. Length: 19.0 mm, tip cross section: 1.3 mm x 0.4 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
RTM 015 S (chisel, 1.5 mm wide)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, chisel-shaped soldering tip. Length: 18.0 mm, tip cross section: 1.5 mm x 0.4 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
RTM 018 S (chisel, 1.8 mm wide)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, chisel-shaped soldering tip. Length: 18.0 mm, tip cross section: 1.8 mm x 0.4 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
RTM 020 G (gullwing, 2.0 mm wide)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, 45° gullwing-shaped soldering tip. Length: 20.0 mm, tip cross section: 2.0 mm x 1.2 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
RTM 022 S (chisel, 2.2 mm wide)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, chisel-shaped soldering tip. Length: 18.0 mm, tip cross section: 2.2 mm x 0.4 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
RTM 025 K (knife, 2.5 mm edge)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, 45° knife-shaped soldering tip. Length: 19.0 mm, tip edge: 2.5 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
RTM 030 K (knife, 3.0 mm edge)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, 45° knife-shaped soldering tip. Length: 19.0 mm, tip edge: 3.0 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
RTM 032 S (chisel, 3.2 mm wide)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, chisel-shaped soldering tip. Length: 17.5 mm, tip cross section: 3.2 mm x 0.9 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
RTM 036 S (chisel, 3.6 mm wide)
From the Weller RT Micro Soldering Tips project.
Weller RT Micro 40 Watt, chisel-shaped soldering tip. Length: 18.0 mm, tip cross section: 3.6 mm x 0.9 mm. Compatible with WMRP and WXMP soldering irons.
$40 $8 US Shipping / $18 Worldwide
In stock
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