Product Overview
Sylvania 51912 (QTP1x70MH/UNV-F) 70W Electronic Metal Halide Ballast — 120-277V, Feet Mount
The Sylvania 51912 (QTP1x70MH/UNV-F) is a commercial-grade 70-watt universal voltage (120–277V) electronic HID ballast engineered for ceramic and quartz metal halide lamps (ANSI C139/C98 and M139/M98). Designed with an F-case feet-mount enclosure featuring side-exit lead wires, this low-frequency 165Hz square-wave ballast delivers 79 nominal system watts at a 1.0 ballast factor for track luminaires, recessed downlights, and landscape fixtures. Equipped with constant power regulation, dynamic end-of-lamp-life shutdown sensing, and transient surge protection, it ensures superior lamp color consistency, extended lumen maintenance, and silent operation. Always verify lamp ANSI code, line voltage, mount style, and socket pulse ratings before ordering.
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VOLTAGE
120–277V
50/60Hz Universal
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POWER RANGE
79W System
70W Lamp (1.0 BF)
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LAMP TYPE
70W MH / CMH
C139/C98 / M139/M98
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DIMENSIONS
5.0" x 3.4"
Feet Mount (F Case)
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START TYPE
Electronic
165Hz Square Wave
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Technical Specifications
| Brand | Sylvania / OSRAM |
| Product / Item Number (NAED) | 51912 |
| Ordering Abbreviation | QTP1x70MH/UNV-F |
| Product Series | QUICKTRONIC® Professional MH Series |
| Ballast Type | Electronic Metal Halide (Low Frequency Square Wave) |
| Number of Lamps | 1 Lamp |
| Primary Lamp Wattage | 70 W (70W T6 Ceramic or Quartz MH) |
| Compatible ANSI Lamp Codes | C139 / C98 (Ceramic), M139 / M98 (Quartz) |
| Input Voltage | 120–277V AC (±10% Range: 108–305V, 50/60 Hz) |
| Input Current | 0.67 A @ 120V / 0.29 A @ 277V |
| Total Input Power (System Wattage) | 79 W |
| Ballast Factor | 1.00 |
| System Lumens / Efficacy | 7,000 lm / 89 lm/W (Based on Ceramic Lamp) |
| Operating Frequency | 165 Hz Square Wave |
| Power Factor / THD | >98% Power Factor / <10% THD |
| Lamp Current Crest Factor | <1.2 |
| Minimum Starting Temperature | -22°F (-30°C) |
| Maximum Case Temperature | 80°C (176°F) Thermally Protected |
| Enclosure Type / Mounting Style | F Case (Feet Mount with Side-Exit Lead Wires for Track/Surface Fixtures) |
| Overall Dimensions (L x W x H) | 5.0 in x 3.4 in x 1.4 in (Mounting Center: 4.6 in) |
| Product Weight | 0.6 lb (0.27 kg) |
| Remote Mounting Distance | Typically 6 ft (Remote capability up to 15 ft) |
| Socket & Wire Pulse Requirements | Minimum 4kV Pulse Rated Lampholder; 4kV Pulse Rated or UL Style 3561 Wire |
| Sound Rating | Class A (Quiet Operation) |
| Certifications & Compliance | UL Listed (Type 1 Outdoor, Suitable for Recessed Use), FCC 47 CFR Part 18 Non-Consumer, ANSI C62.41 Cat. A Transient Protection |
| Master Carton Quantity | 10 Pieces per Carton (6.0 lbs) |
| Warranty | QUICK 60+® System Warranty (5 Years @ <75°C, 3 Years @ <80°C) |
| Sibling / Related SKUs | 51913 (QTP1x70MH/UNV-J J-Box Mount), 51963 (QTP1x70MH UNV SQ F Mini Square) |
Product Overview
The Sylvania 51912 (QTP1x70MH/UNV-F) is a high-performance QUICKTRONIC Professional Series electronic ballast engineered to operate a single 70-watt ceramic or quartz metal halide lamp. Delivering precise 165Hz low-frequency square-wave power regulation, this electronic ballast eliminates lamp acoustic resonance and visible flicker while providing superior lumen maintenance and color stability compared to conventional electromagnetic ballasts.
Designed in the compact "F Case" enclosure configuration with integral mounting feet and side-exiting lead wires, the 51912 is specifically optimized for track lighting heads, architectural spotlights, landscape lighting, and surface-mounted commercial fixtures. Operating on universal 120–277V input with a power factor greater than 98% and total harmonic distortion under 10%, it delivers up to 15% energy savings over magnetic systems.
The unit features integrated intelligent sensing technology that automatically de-energizes lamp power when an inoperative, rectifying, or damaged lamp is detected, safeguarding the internal electronics and fixture housing. Rated for cold-weather ignition down to -22°F (-30°C) with a maximum case temperature of 80°C, it provides durable, long-term performance backed by the Sylvania QUICK 60+ system warranty.
Compatible Applications
- Commercial track lighting systems and spotlight fixtures in retail stores and art galleries
- Recessed downlight luminaires and architectural accent fixtures in hospitality environments
- Outdoor commercial landscape lighting and perimeter building floodlights
- Institutional and commercial HID fixture retrofits replacing older magnetic ballasts
Before Ordering – Verify
- Lamp ANSI Code Compatibility: Designed specifically for (1) 70W Metal Halide Lamp conforming to ANSI codes C139 / C98 (Ceramic) or M139 / M98 (Quartz).
- Mounting Style (F Case vs J Case): This model features Feet Mount (F Case) with side-exiting lead wires for track and surface fixtures. If your installation requires bottom studs with center lead exits for recessed junction boxes, order the sibling J-Box mount model 51913 (QTP1x70MH/UNV-J).
- Socket & Lead Wire Pulse Rating: Fixture must be equipped with a minimum 4kV pulse-rated lampholder and 4kV pulse-rated lead wires (UL Style 3561). The red lead must connect to the center lamp contact. Do not connect lamp leads to ground or neutral.
- Input Voltage: Operates on universal 120–277V AC (50/60Hz). Confirm total system wattage is 79W and input current is 0.67A @ 120V / 0.29A @ 277V.
- Remote Wiring Distance: Recommended ballast-to-socket lead distance is typically 6 feet (remote mounting capable up to 15 feet).
Safety and Handling Guidelines
- Disconnect primary electrical power at the main circuit breaker before inspecting, wiring, or replacing the ballast.
- Ensure the ballast metal case is properly grounded in accordance with the National Electrical Code (NEC) and local electrical codes.
- Connect the red lead wire strictly to the center contact of the lamp socket; never connect high-voltage pulse lamp leads to ground or neutral.
- Do not exceed the maximum allowable case temperature of 80°C (176°F); verify sufficient airflow and thermal heat sinking inside the fixture cavity.
Compliance
- Safety Certifications: UL Listed (Type 1 Outdoor, Suitable for Recessed Use, Thermally Protected).
- Electromagnetic Standards: Complies with FCC 47 CFR Part 18 Non-Consumer limits.
- Surge Protection: Meets ANSI C62.41 Category A Transient Protection standards.
- Sound Rating: Class A (Quiet, Non-Audible Operation).
Ordering Information
- Order Code / Item Number (NAED): 51912
- Ordering Abbreviation: QTP1x70MH/UNV-F
- Brand: Sylvania / OSRAM
- Primary Lamp: (1) 70W T6 Ceramic or Quartz Metal Halide (ANSI C139/C98, M139/M98)
- Input Voltage: Universal 120–277V (50/60 Hz)
- Mounting Configuration: F Case (Feet Mount, Side-Exit Leads)
- Packaging: Master carton contains 10 ballasts (6.0 lbs).
For wholesale pricing, bulk availability, or help confirming the correct replacement lamp, contact ADL Supply at 1-800-235-3489.
