Description
Philips Advance LI551-H4 / LI551-H4-IC High Pressure Sodium HID Ignitor Guide
Quick Answer: The Philips Advance LI551-H4 (and "IC" individual carton as replacement kit LI551-H4-IC) is a standard round-case digital/electronic HID ignitor rated for 105°C case temperature operation in High Pressure Sodium (HPS) ballast circuits. Engineered for low-to-medium wattage HPS applications, it operates 35W, 50W, 70W, 100W, and 150W lamps across Reactor (R), High-Reactance (HX), Constant Wattage Autotransformer (CWA), and Constant Wattage Isolated (CWI) ballast types.
Philips Advance LI551-H4 Overview & Key Features
The LI551-H4 ignitor delivers high-voltage starting pulses required to ionize and ignite sodium arc tubes across residential, commercial, and outdoor security luminaires:
- Low-to-Medium Wattage HPS Coverage: Specifically tailored for 35W (S76), 50W (S68), 70W (S62), 100W (S54), and 150W (S55) High Pressure Sodium lamps.
- Standard Round Case Design: Compact round potted aluminum housing (1.3" diameter x 2.5" height) with 12-inch lead lengths and standard RW33CC1252 mounting clip furnished on -IC units.
- 105°C High Temperature Rating: Built to operate reliably under high thermal conditions inside tight commercial and outdoor fixture housings.
- Standard Wiring Distance: Provides standard 2-foot to 10-foot maximum allowable lead wire distance between ballast/ignitor and lamp socket depending on circuit type.
Philips Advance LI551-H4 Technical Specifications & Compatibility
Core performance parameters and ballast family cross-references from the official Philips Advance HID Atlas:
| Lamp Wattage | ANSI Code | Circuit Type | Advance Ballast Family | Max. Dist. to Lamp | Case Type |
|---|---|---|---|---|---|
| 35W | S76 | Reactor (R) | 71A7707 | 2 ft | Round (LI551-H4-IC) |
| 50W | S68 | HX / Reactor (R) | 71A7801, 71A7807 | 2 ft | Round (LI551-H4-IC) |
| 70W | S62 | HX / CWA / Reactor (R) | 71A7901, 71A7907, 71A7908 | 2 ft – 5 ft | Round (LI551-H4-IC) |
| 100W | S54 | HX / CWA / Reactor (R) | 71A8001, 71A8007, 71A8008 | 2 ft – 5 ft | Round (LI551-H4-IC) |
| 150W | S55 | HX / CWA / Reactor (R) | 71A8101, 71A8107, 71A8108 | 2 ft – 10 ft | Round (LI551-H4-IC) |
Installation & Lead Wire Guidelines
- 3-Lead Wiring Identification: Connect the 12-inch color-coded leads into the HPS circuit: Red (X1) to Lamp socket lead, White (X2) to Common Neutral, and Blue (X3) to the ballast coil tap.
- Lead Distance Constraints: Keep lead wires as short as possible (under 2 ft to 10 ft max) to prevent high-voltage pulse attenuation caused by wire capacitance.
- Individual Carton Packaging (-IC): Units with the -IC suffix are individually cartoned and include the RW33CC1252 round-case mounting clip for quick installation.
Frequently Asked Questions
What is the difference between LI551-H4 and LI501-H4?
The LI551-H4 is optimized for lower-wattage High Pressure Sodium lamps (35W to 150W), whereas the LI501-H4 is engineered for higher-wattage HPS systems (150W to 400W).
What does the "-IC" suffix mean?
The "-IC" suffix stands for "Individual Carton" packaging, indicating that the ignitor is packaged in a single box and includes the RW33CC1252 mounting clip.
Can the LI551-H4 be used for remote ballast installations?
The LI551-H4 is a standard-range ignitor limited to 2 to 10 feet maximum distance to the lamp socket. For extended remote mounting distances up to 35 to 50 feet, use the long-range LI501-J4 / LI501-J4-IC ignitor.
Spec SheetsAdditional Information
Our Part No: |
BS-LI551H4IC |
Mfr Part #: |
LI551H4IC |
Manufacturer Material Code: |
913710571103, 913700509021 |
Brand: |
Advance |
Fixture Type: |
HPS Ignitor |
Lamp: |
35W-150W |
Dimensions: |
2 1/8" (L) x 1 1/2" (Diam) |
Product Data Sheet: |
See PDF Link Provided |
Operates: |
35W (S76), 50W (S68), 70W (S62), 100W (S54), 150W (S55) |
Shape: |
Round |
Energy Certification: |
RoHS |
Warranty: |
Manufacturer's |
Case Size: |
12 |
