For Shunt & Precision Resistor Makers

A shunt is a resistor that has to stay a resistor. What you are buying is not wire — it is a resistance value that does not move.

The three numbers that decide the sale

Number	Why it matters	What we do
Resistance per metre	Sets the shunt value directly	Measured and printed on every spool label
Temperature coefficient	Decides drift under load	Grade selected for the operating range, not the catalogue
Batch consistency	Decides whether lot 2 matches lot 1	Chemistry and anneal held within one process route

Most quality complaints in this business trace back to the third row. A supplier can hit the resistance on the first lot and miss it on the fourth because the anneal drifted. The fix is process control, not tighter incoming inspection.

Grades we draw for this

Grade	Resistivity	Where it is used
6J12	≈ 0.47 µΩ·m	General precision shunts, load banks
6J13	≈ 0.43–0.44 µΩ·m	Meter shunts, BMS sensing
6J8	≈ 0.42–0.47 µΩ·m	Standard resistors, ratio bridges
6J40 constantan	≈ 0.49 µΩ·m	Shunts where solderability matters

Trial lots

Qualification runs are usually 1–5 kg. We take them, because that is how a supplier gets onto a shunt maker's approved list — and how the 200 kg order arrives eighteen months later.

Questions we get asked

Can you hold a resistance tolerance?

Yes, on the measured value per spool. State the target Ω/m and the tolerance band at quotation.

Do you supply cut lengths?

Yes — spool or cut length to your drawing, within the diameter range.

Send the specification — diameter, grade, temper, quantity.

We come back with a confirmed lead time and the documentation we can issue for the shipment. 100 g sample at cost; orders from 1 kg.

Request a quotation Order a 100 g sample