6J8
Manganin Wire 6J8
Manganin is a copper-manganese-nickel alloy engineered so that its resistance changes as little as possible with temperature. 6J8 sits at the lower-re…
Product family
Manganin Wire
Copper-manganese-nickel, engineered so its resistance barely moves with temperature. A measurement material, not a heating material — and that distinction decides where it can be used.
0.018–6.00Diameter, mm
1 kgMinimum order
3–7 dLead time
100 gSample at cost
| Grade | Resistivity, 20 °C | Typical use |
|---|---|---|
| 6J8 | ≈ 0.42–0.47 µΩ·m | Standard resistors, ratio bridges |
| 6J12 | ≈ 0.47 µΩ·m | General precision shunts, load banks |
| 6J13 | ≈ 0.43–0.44 µΩ·m | Meter shunts, BMS current sensing |
Manganin's temperature coefficient is close to zero near room temperature, and its thermal EMF against copper is small — a couple of microvolts per kelvin. Both properties are what a shunt or a standard resistor is actually buying.
The limit nobody mentions
Manganin's service temperature is roughly 60–100 °C, set not by melting but by the temperature coefficient itself degrading once the alloy is held hot. If your application runs hotter than that, the right answer is probably constantan or a different measurement approach — say so early and we will tell you the same thing.
Grades in this family
Pick the designation your drawing cites
6J12
Manganin Wire 6J12
The general-purpose manganin grade. Low temperature coefficient, a small thermal EMF against copper, and resistance that stays put batch after batch —…
6J13
Manganin Wire 6J13
A manganin variant used where a lower resistance level and stable behaviour under load are wanted together. Common in meter shunts and battery-managem…
Questions we get asked
Which grade should I start with?
6J12 for general work, 6J13 for meter shunts and BMS sensing, 6J8 where a specific lower resistance value is needed. Send the target Ω/m and we will propose grade and diameter together.
Can resistance per metre be held to a tolerance?
Yes, on the measured value recorded per spool. State the target and tolerance at quotation.
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