Switchboardfilament lamp for switchboards, telephone and teleprinter exchanges. Lamps are suitable for DC and AC circuits.
Annotation breakdown:
KM-48-50
KM - switchboard lamp
48 - rated voltage, V
50 - rated current, mA
Operational position: horizontal. Operational voltage not more than 1.1 x rated
Lamps are compliant with M1GOST 17516.1, GOST 12.2.007.13
Lamps are resistant to dry heat with temperature up to 338 K (65 oC) at relative humidity not more than 20% during 8 h. Climate version: boreal.
Technical parameters
| Rated voltage, V | 48 | |
| Rated current, A | 50 | |
| Rated luminous flux, lm | 8.6 | |
| Minimum lighting time, h | 2200 | |
| Dimensions, diameter x length, not more than, mm | 6,6 x 4.6 | |
| Mass, not more than, g | 3.5 |
Lamps have a transparent cylindrical tube with special base T6.8, which consists of 2 brass plates and a plastic tip. A version without a plastic tip is subject to custom order. Baseterminal plate is heat-resistant. Lamp is vacuum-filled with a mechanical resistant single-coil filament, able to withstand horizontal and vertical vibrations. Stem type - bead with single holder.
