Description
ADVANCE Electronic Fluorescent Step Dimming Ballast, Universal 120V-277V Input, Two F28T5, F21T5, F28T5/ES, (1) F35T5 Lamps, Programmed Start, Step-Dimming 0/50/100%
Advance Optanium Step-Dim IOP-2S28-95-SC-SD Electronic Ballast Guide
Quick Answer: The Advance Optanium IOP-2S28-95-SC-SD (Signify / Philips Advance) is a high-efficiency 2-lamp electronic step-dimming fluorescent ballast designed to operate two F28T5 linear lamps (as well as 25W energy-saving F28T5/ES, F21T5, and F35T5 lamps) on universal 120–277V line voltage. Featuring Step-Dim (SD) bi-level switching technology (100% full light / 50% dimmed level / 0% off) via dual standard line-voltage wall switches, Programmed Start ignition, a 0.95 Ballast Factor, and a compact Small Can (SC) housing, it delivers energy-code-compliant two-level lighting control for commercial T5 luminaires without requiring separate 0–10V control wires.
Advance Optanium IOP-2S28-95-SC-SD Overview & Key Features
The Advance Optanium Step-Dim T5 ballast provides two-level bi-level lighting control for energy efficiency and Title 24 compliance across commercial linear fixtures, cove lighting, and open-plan offices:
- Step-Dim (SD) Bi-Level Switching: Seamlessly steps between 100% full power, 50% power-saving mode, and 0% off using standard line-voltage wall switches or multi-level occupancy sensors.
- Line-Voltage Switching (No 0–10V Wiring): Achieves code-compliant bi-level dimming without the added labor and hardware expense of running dedicated low-voltage control lines.
- Programmed Start Technology: Gently preheats lamp filaments prior to ignition to prevent cathode sputtering, extending lamp life in environments with frequent switching cycles.
- IntelliVolt Universal Voltage: Automatically operates across input line voltages from 120V to 277V AC at 50/60 Hz.
- 0.95 Ballast Factor: Normal light output profile engineered specifically for optimal illumination and lumen output from 28W T5 lamps.
- Small Can (SC) Enclosure: Low-profile, compact metal housing designed to fit easily inside narrow linear T5 fixture channels and troffer wireways.
Advance Optanium IOP-2S28-95-SC-SD Technical Specifications
Core performance specifications and electrical parameters for the Advance Optanium IOP-2S28-95-SC-SD step-dimming T5 ballast:
| Specification Parameter | Rating / Value | Details & Performance Standards |
|---|---|---|
| Input Voltage | 120 – 277 VAC | IntelliVolt auto-sensing supply, 50/60 Hz |
| Lamp Compatibility | F28T5 (28W), F28T5/ES (25W), F21T5 (21W), F35T5 | Standard and energy-saving linear T5 fluorescent lamps |
| Number of Lamps | 2 Lamps (F28T5, F21T5) / 1 Lamp (F35T5) | Operates 2 standard 46-inch F28T5 lamps |
| Dimming / Control Type | Step-Dim (SD) Bi-Level | Two-step switching: 100% High / 50% Low / 0% Off |
| Starting Method | Programmed Start | Controlled cathode preheat ignition |
| Ballast Factor (High / Low) | 0.95 (100% mode) / ~0.48 (50% mode) | Normal ballast factor for standard T5 light output |
| Power Factor / THD | > 0.98 PF / < 10% THD | Commercial grade high power factor performance |
| Starting Temperature | 0°F (-18°C) | Cold-start capability for indoor and protected outdoor spaces |
| Enclosure Type | Small Can (SC) | Low-profile metal housing (9.5" L x 1.7" W x 1.18" H) |
| Compliance & Certifications | UL Listed, CSA Certified | RoHS compliant, Class P thermally protected, Sound Rated A |
Installation & Step-Dim Wiring Guidelines
- Power Disconnect: Always shut off main AC electrical power at the breaker panel before servicing or installing the ballast.
- Dual Switched Hot Wiring: Connect the White lead to AC Neutral. Connect Line 1 and Line 2 to two separate switched AC line feeds. With both lines energized, lamps operate at 100% output; de-energizing one line drops output to the 50% step-dim level.
- Programmed Start Socket Wiring: Follow the wiring schematic printed on the ballast case label. Programmed start circuitry requires dedicated pairs of leads connected to each rapid/programmed start lamp socket.
- Enclosure Grounding: Securely fasten the metal Small Can case to the grounded fixture housing to guarantee proper electrical ground and thermal dissipation.
Frequently Asked Questions
What does "IOP-2S28-95-SC-SD" stand for in Advance's catalog?
"IOP" designates the Optanium series, "2" indicates 2-lamp capacity, "S" stands for Programmed Start, "28" represents 28W T5 lamps, "95" indicates the 0.95 Ballast Factor, "SC" denotes the Small Can housing, and "SD" designates Step-Dim bi-level switching technology.
What is the difference between IOP-2S28-95-SC-SD and IOP-2S28-115-SC-SD?
The IOP-2S28-95-SC-SD operates at a normal ballast factor of 0.95 for standard commercial brightness, whereas the IOP-2S28-115-SC-SD features a high ballast factor of 1.15 to generate increased lumen output per fixture.
How does step-dimming function without low-voltage wires?
Step-Dim ballasts utilize dual switched AC input hot wires. When both switches are turned on, full power is delivered (100%). When one wall switch is shut off, the internal ballast circuitry automatically reduces power to operate at a 50% dimmed level.
Spec Sheets
Download the official manufacturer documentation and specifications:
Additional Information
Our Part No: |
BSF-ADV-IOP2S2895SCS |
Mfr Part #: |
IOP2S2895SCSD |
Manufacturer Material Code: |
913710814901, 913710814902 |
Brand: |
Advance |
Fixture Type: |
Electronic Fluorescent Step-Dimming |
Input Voltage: |
120-277V (Universal) |
Lamp: |
(2) F28T5, (2) F28T5/ES, (2) F21T5, (1) F35T5 |
Dimensions: |
9.50" L x 1.3" W x 1.18" H |
Product Data Sheet: |
See PDF Link Provided |
Start Method: |
Programmed Start |
Features: |
Step Dimming 0%/50%/100% |
Features: |
Step Dimming 0%/50%/100%, Normal Ballast Factor |
Number Of Lamps: |
2 |
Operates: |
F28T5, F28T5/ES, F21T5, F35T5 |
Warranty: |
Manufacturer's |
Case Size: |
20 |
