Replacement Electronic Metal Halide Ballast for ULT M3912-27CK-5EU 39W MH - 120-277V Universal Input Side Exit Leads

Replacement for the ULT M3912-27CK-5EU delivers reliable operation for 39W metal halide lamps in a wide range of fixtures. This electronic ballast accepts 120-277V universal input and maintains steady lamp wattage through constant power regulation regardless of voltage fluctuations. Side exit leads allow straightforward wiring in tight enclosures while the absence of mounting feet supports drop-in installation where space is limited. High power factor performance lowers line current draw and improves overall system efficiency. The unit carries UL Outdoor Type 1 listing along with FCC Part 18C compliance, making it suitable for permitted indoor and outdoor locations. Built-in thermal protection and end-of-life detection help safeguard both the lamp and the fixture during extended service life.

Key Features & Benefits

• Constant power regulation maintains lamp wattage across the 120-277V range
• High power factor design reduces line current draw
• Side exit leads simplify wiring in compact enclosures without mounting feet
• UL Outdoor Type 1 listing and FCC Part 18C compliance for permitted locations

Product Specifications

• Watts: 39
• Input voltage: 120-277V
• Lamp type: MH single lamp M130/C130
• Lead configuration: side exit
• Regulation: constant power
• Power factor: high
• UL rating: Outdoor Type 1
• FCC compliance: Part 18C
• Replaces OEM: M3912-27CK-5EU, 188156

Replacement Compatibility

Installs in fixtures originally equipped with ULT M3912-27CK-5EU or 188156 ballasts for 39W metal halide lamps. Supports multi-application use where the original ballast form factor and electrical ratings are required. Technicians can verify compatibility by confirming the existing ballast carries the same part number or cross-reference before ordering. Once installed the replacement restores full lamp ignition sequence and steady-state operation without requiring housing modifications or additional wiring adapters. Regular inspection of lead insulation and connections after installation ensures continued safe performance over the ballast service life.

Discover the Perfect Replacement

Confirm your fixture requires a 39W metal halide ballast with 120-277V universal input and side exit leads before ordering. This part restores the original operating characteristics without modification to the housing or wiring. Proper voltage supply and correct lamp type selection prior to energizing the circuit prevent premature failure and maintain warranty coverage. The ballast design supports single-lamp M130 or C130 metal halide operation and provides reliable starting even at lower ambient temperatures common in outdoor applications.

During the checkout process, you can choose from expedited services such as overnight delivery to standard ground shipping. We aim to ensure your order is delivered promptly and reliably, wherever you are.

All returns must be made within 30 days of purchase with the invoice. (After 30 days, Interlight credit only, Minimum 25% restocking fee, no returns after 60 days, special items order just for you are not returnable.)

At Interlight, your satisfaction is our priority. We offer a 30-day money-back guarantee on eligible products, provided they are returned in resalable condition with the original invoice.