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Terry Brine
29.06.26

Wiring Pencil with Brake (QSE) RRP-123

£15.62

Wiring Pencil with Brake (QSE) RRP-123, is preloaded with a Solderable Enamel Wire Bobbin or wire spool.

Based on the standard version, the wiring pencil has been enhanced and incorporates a finger brake, which operates against the bobbin of wire and accurately controls the wire tension.

A full, ready to use bobbin of solderable enamel wire is provided with each pencil

This wiring tool, is recommended for: beginners or advanced students, technicians, engineers or hobbyists for the assembly and wiring of Dual In Line logic and microprocessor circuits or discrete electronic circuits using the Roadrunner Rapid Wiring System, Surface Mount Technology (SMT) and the wiring of Surface Mount Devices (SMD’s); for end of line or Field Service for PCB or PWB track repair, rework, shorting links or modifications.

The coloured Solderable Enamel Wire (QSE) bobbins are interchangeable with the TCW Wiring Pencils (RRP-104 and RRP-124).

Replacement Solderable Enamel (QSE) Bobbins: Part Nos.:

Wire Diameter: 0.15mm or 38swg

RRP-C-105: Copper/Gold

RRP-G-105: Green

RRP-P-105: Pink/Red

RRP-V-105: Violet/Blue

RRP-A-105: Assorted – one of each of the above

Wire Diameter:0.19mm or 36swg

RRW-C-105: Copper/Gold

RRW-G-105: Green

RRW-P-105: Pink/Red

RRW-V-105: Violet/Blue

RRW-A-105: Assorted – one of each of the above

Safety Note: The coloured bobbins are insulated and the insulation is removed at the connection points using a temperature controlled soldering iron.

CAUTION: When soldered, the solderable enamel emits a toxic vapour, toluene diisocyanate, ventilate area well.

Solderable Enamel Wire Data Sheet

Material Information Sheet – Solderable Enamel Wire

Please Note: To maintain the supply of the four colours, there may be differences in the colour shades or colours, i.e. Pink & Red, Violet & Blue, Green may have a different shade and the Copper/Gold colour is generally constant.

The wire diameter may vary: 0.15mm dia., may be supplied as 0.16mm dia.; 0.19mm dia., may be supplied as 0.20mm dia. Additionally, the grades may vary from 2 to 1

Frequently Asked Questions

What is the RRP-123 Wiring Pencil with Brake?
The RRP-123 is a wiring pencil preloaded with a bobbin of 0.15 mm or 0.19 mm solderable enamel wire (QSE) and features an integrated finger brake for precise tension control.

How does the finger brake enhance solderable enamel wire use?
The finger-operated brake applies adjustable pressure on the enamel wire bobbin, ensuring a steady feed that prevents tangles and allows smooth application of wire for wiring and rework.

What applications is the RRP-123 recommended for?
It’s ideal for wiring DIL logic, microprocessor circuits, discrete electronics, SMT/SMD hand-wiring, PCB track repairs, and field service rework using the Roadrunner Rapid Wiring System.

Which QSE bobbins are compatible and how do I replace them?
The RRP-123 accepts QSE bobbins (0.15 mm: RRP-C-105, RRP-G-105, RRP-P-105, RRP-V-105, RRP-A-105; 0.19 mm: RRW-C-105, RRW-G-105, RRW-P-105, RRW-V-105, RRW-A-105). Unscrew the cap, swap bobbins, and reassemble, then adjust brake tension.

Are there safety considerations when using solderable enamel wire?
Yes. The enamel insulation is burnt off at 400–430 °C, releasing toluene diisocyanate vapors, so ensure proper ventilation or fume extraction, and wear suitable protective equipment.