SM 28-2 (SM 39)
Aircraft lamp
Description
Purpose
SM 28-2 (SM 39) is a miniature aircraft incandescent lamp rated for 28 V and 2 W. It is used as a replaceable light source in compatible cockpit, cabin, instrument or signalling equipment. The designation identifies the electrical execution; the holder and contact arrangement must also match the installed unit.
Full descriptionCollapse description
Construction
The clear glass envelope contains a mechanically supported tungsten filament intended for vibration-prone transport equipment. The metal base fixes the lamp in its holder and provides the electrical connection. The compact construction allows installation in restricted lighting assemblies while keeping the filament in the designed optical position.
Electrical and dimensional data
This version uses the BA7s/11, single contact base and has reference dimensions of 20 mm × 6.6 mm. Published reference data lists a luminous flux of 8 lm. The stated operating life is 100 hours. These values help distinguish the lamp from visually similar SM versions.
Selection and compatibility
Order by the complete designation rather than voltage alone. Check rated power, base diameter, number of bottom contacts, side-pin arrangement and available installation space. Lamps with a similar bulb can use different holders or place the filament at another height. Related products are shown for catalogue navigation and do not indicate direct interchangeability.
Supply
SM 28-2 (SM 39) is supplied as a pre-order position for maintenance and component replacement. Before ordering, compare the marking and contact geometry of the removed lamp with the equipment documentation. Aviamisto can review a photograph of the lamp, holder or relevant parts-catalogue entry when additional identification is required.
Technical details
- Product Type
- Miniature aircraft incandescent lamp
- Designation
- SM 28-2 (SM 39)
- Alternative Designation
- SM 39
- Rated Voltage
- 28 V
- Rated Power
- 2 W
All specificationsCollapse specifications
- Reference Luminous Flux
- 8 lm
- Reference Operating Life
- 100 h
- Base Type
- BA7s/11, single contact
- Reference Dimensions
- 20 mm × 6.6 mm
- Bulb
- Clear glass
- Light Source
- Tungsten filament
- Operating Position
- Universal unless equipment documentation states otherwise
- Typical Function
- Cockpit, cabin, instrument or signalling lighting
- Selection
- By full designation, voltage, power and contact geometry
Payment & delivery
Orders ship from our hub in Dubai. Partner stock is first transferred to Dubai, then shipped to you.
Dubai stock: 100% before dispatch. Partner stock (Remote stock) and Pre-order: 50% advance payment to start the order and 50% before shipment from Dubai to you.
Availability, lead time, delivery cost and payment terms are confirmed for your order before payment.
Payment & delivery terms