FNIRSI HS-02B Micro Soldering Iron Kit 100W
- Up to 100W, adjustable 212-842 F
- 3 preset temperatures, sleep and auto power-off
- 3 tips included: I, IS and K
- Corded only, runs from the supplied cable and 100W adapter
- 0.96 inch display
- Storage case for carrying
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact smart iron for electronics and jewelry repair that heats fast and stores presets. It runs only on its cable and adapter, never cordless.
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ASIN: B0D9LTCDRRModel: HS-02BCategory: Soldering Irons
Overview
FNIRSI built this pen-style iron for circuit boards, micro soldering and jewelry work, with an integrated heater and tip that reach temperature quickly. A small display shows settings, and three presets switch temperatures fast.
Fast heat-up and stored presets save time when moving between fine pads and larger joints. Power depends on the adapter: a weaker source can trip overcurrent protection, which needs the adaptive power mode.
Who it's for
Electronics hobbyists and repair techs who need a light iron for fine work, plus anyone soldering jewelry. People soldering heavy cable or large ground planes need more tip choice than the three included.
Pros and cons
- Fast heat-up from integrated design
- Stored temperature presets
- Sleep and auto power-off modes
- Carry case included
- Only three tips in the kit
- Weak power sources can trigger restarts
Performance notes
Heat recovery depends on the integrated heater and tip and on the power source feeding it, which is why the full-power adapter matters. When a source cannot supply enough current, overcurrent protection restarts the iron, and the adaptive power mode trades some speed for stability.
Specifications
| Brand | Fnirsi |
|---|---|
| Model | HS-02B |
| Capacity & performance | |
| Wattage | 100 W max |
| Temperature range | 212-842 F |
| Maximum Temperature | 842 F |
| Power & efficiency | |
| Power Source | Corded, 100W charging adapter |
| Included components | |
| Included Components | Soldering iron, 3 tips (I, IS, K), 100W adapter, cable, storage case |
| Other details | |
| Additional Features | 3 temperature presets, sleep, automatic power-off, adaptive power mode |
| Specific Uses For Product | Electronics, circuit boards, micro soldering, jewelry |
| Display | 0.96 inch |
Frequently asked questions
How do I avoid restarts on the FNIRSI HS-02B?
If the current is too high for the source, overcurrent protection may restart the iron. Switch to Adaptive Power Mode for stable use, or use the supplied 100W adapter.
Can the FNIRSI HS-02B run on a battery?
No. It must be used with its charging cable and does not support cordless use.
What tips come with the FNIRSI HS-02B?
Three tips: I, IS and K.