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Tridonic 2D HO Combo High Frequency Ballast 1 x 28w
Quick Find: 28256
Product Discontinued
This item was discontinued on 23rd December, 2021
Alternatively check out our full range of simular products below:
Tridonic Atco Control Gear
Accessory Type
Ballast
Control Gear Technology
Fluorescent
Control Gear Type
Emergency
Depth
30 mm
Dimming?
Non-Dimmable
Length
123 mm
Manufacturer
Tridonic
No. Of Lamps
Single (1x)
Type
Control Gear
Wattage
28 W
Width
79 mm
Product Overview
Tridonic 2D HO Combo High Frequency Ballast 1 x 28w from Tridonic
Model: 89899957
Designed for use with PLT and 2D Single Compact Fluorescent Lamps rated at 28 watts this Tridonic Combo HF Ballast features a 3 hour emergency duration, a lightweight slim and compact housing and hot lamp restart in normal operation. A combination of electronic ballast and emergency lighting unit this gear manually tests emergency lighting functions and guarantees light output in the event of mains failure.
Technical Specifications
| Control Gear Type | Emergency |
|---|---|
| Accessory Type | Ballast |
| Wattage | 28 W |
| Manufacturer | Tridonic |
| Dimming? | Non-Dimmable |
| No. Of Lamps | Single (1x) |
| Cells | 3 (3.6v) |
| Depth | 30 mm |
| Lamp | 1 x 28w 2D |
| Length | 123 mm |
| Type | Control Gear |
| Width | 79 mm |
| Compatible Lamp Type | PLT (4 Pin) |
| Compatible Lamp Type | 2D (4 Pin) |
| Control Gear Technology | Fluorescent |
| Manufacturers Part Number | 89899957 |
Associated Product Barcodes
| 9006210272337 |
Alternative Stock Identifier Part Codes
| 89899957 |
| D128+ |
| PC 1x28-33 HO DD COMBO |
Downloads 1
 | Product Data Sheet Tridonic 2D HO Combo High Frequency Ballast Data Sheet |
Associated Lamps 2
Lawrence Gibbons
12th December 2025
These guys deserve a review just because of how expertly packaged they sent my fragile and delicate T5 tubes. I will admit not having high hopes of a courier being able to deliver these in one piece but they were snugly bubble wrapped in a very sturdy cardboard tube. Fantastic fast delivery.
Isabel Davies
3rd December 2025
BLT suggested an alternative light bulb for one that had been discontinued which meant I didn't have to replace the fitting, very helpful, thanks
