The lead-in wire for electric lamp is the only way to introduce the electricity outside the lamp into the lamp. Its main function is to connect the internal electrode of the lamp with the external circuit; conduct current and support the filament and electrode, The 3-part welded lead-in wire is composed of three different materials, that is, the inner lead (the part inside the lamp), the outer lead(the part outside the glass body), and the sealing lead (the part sealed with the glass body). The lead-in wire is an important part of the lamp. Our lead-in wire have following advantages: good electrical conductivity, good leakproofness after sealing with glass, and good stability when the lamp is working.
Type of lead-in wires
Type 1
Standard 3-part lead-in wire
Type 2
inner (1) and outer (3) leads are two strands of wire twisted along the central axis
Type 3
Inner lead (1) consists two strands of wire twisted along the central axis
Type 4
Inner (1) and outer (3) leads are at least two strands of wires, which are in parallel along the central axis
Specifications
| 1 （inner lead） | 2 (seal) | 3 (outer lead) | |
|---|---|---|---|
Standard materials other materials available per request |
nickel plated steel copper clad steel pure nickel FeNi 48 nickel plated copper copper plated nickel |
Dumet red/yellow/white |
copper nickel copper plated nickel nickel plated copper copper clad steel |
| Temper | Hard/Soft | Borated/Oxidised | Hard/Soft |
| Diameter (mm) | 0.06-1.8 | 0.1-0.8 | 0.05-1.8 |
| Diameter tolerance | +/-2% | +/-1% | +/-2% |
| Available length | 5-150 | 2-30 | 5-150 |
| Length tolerance | +/-0.2mm | +/-0.2mm | +/-0.2mm |
Packing
Divided flat packs, plastic tubes or as per customer requirements