2UUL FD33 S Soldering Iron Tip for C115 Soldering Station (1 Pack)

On a busy GSM repair bench, the tip you put on your soldering pen matters more than the brand name printed on the station itself. The 2UUL FD33 S is a curved (S-type) tip made for the C115 nano cartridge system, and it solves a problem every technician runs into sooner or later: straight tips just don't reach some pads. When you're working next to a shield, a connector, or a stacked component on a tightly packed motherboard, a curved tip lets you angle in and land solder exactly where you need it without disturbing the parts around it.
The C115 series is the smallest cartridge family used in nano soldering handles, and it was designed specifically for micro-level work — the kind of soldering you do under a microscope on iPhone and Android logic boards, not general electronics assembly. That's exactly the segment KB GSM Store customers work in every day, whether it's IC change karna on a dead board, jumper lagana after a trace repair, or fine-pitch work during BGA reballing.
One thing that makes the C115/NT115 handle system useful for the Pakistani market specifically is cross-brand compatibility. You don't need an original JBC station to run this tip. As long as your soldering pen uses the same nano handle standard, the FD33 S fits Sugon, Aixun, OSS Team, Aifen, and GVM stations too — and these are the brands most commonly running on repair benches across Lahore, Karachi, and Islamabad. That means if your station handle takes C115 tips, you can swap between straight, knife, and curved profiles depending on the job without buying a new handle every time.
Construction-wise, the C115 series uses a copper core wrapped in a stainless steel shell, which is what gives these tips their fast heat response. The core design puts the heating element right at the tip instead of relying on a separate heating rod further back, so the tip reaches working temperature in seconds rather than the slow ramp-up you get with older soldering iron designs. For a technician doing dozens of small joints a day, that faster recovery time between touches on the board adds up — less waiting, more actual soldering.
The curved S-type shape earns its place next to the FD31 K (knife) and FD32 I (straight) variants in the same lineup. Use the knife tip for drag soldering and cleaning solder bridges, the straight tip for fine-pitch pads and wire work in open areas, and this curved tip when you need to come in from an angle — under a shield can, beside a connector, or on boards where the component you're working on sits lower than the parts around it. Picking the right shape for the job protects the pad and saves you from lifting traces trying to force a straight tip into a spot it wasn't built for.
Like any fine soldering tip, tinning it before first use and keeping a light coat of solder on it between joints protects it from oxidation and keeps heat transfer consistent. Wipe it on a damp sponge or brass wool between solder joints rather than letting flux residue build up, and re-tin before parking the iron back in the stand. Treated properly, a C115 series tip holds its edge through a lot of board-level repair work before it needs replacing.
This listing covers the 1-pack option — a single FD33 S replacement tip, sold separately from the handle and station. It's a straightforward restock item for any bench that's already running a nano handle setup and needs the curved profile in rotation alongside straight and knife tips for daily hardware fault and jumper repair work.