Keystone HPS-400A-Q-KIT – 400W S51 Ballast - Multi-Tap 120–480V

Brand: Keystone
Item number: HPS-400A-Q-KIT 3/1
UPC: 890949011621
Product Type: Ballasts
Wattage: 400 Watt
Input Voltage: Quad Tap (120/208/240/277)
Ballast Type: Magnetic High Pressure Sodium
Power Factor: High

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$205.00

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Model: HPS-400A-Q-KIT 3/1

The Keystone HPS-400A-Q-KIT is a heavy-duty 400W High Pressure Sodium (HPS) ballast kit designed to meet the demanding needs of commercial and industrial HID lighting systems. Built with a constant wattage autotransformer (CWA) circuit, this kit ensures stable power regulation and long lamp life, even under tough conditions.

This model does not include an internal ignitor, allowing seamless integration with external ignitors like the Keystone XG-02, offering greater system flexibility. The quad-tap voltage input (120V, 208V, 240V, 277V) supports a wide range of electrical setups, making installation in various environments quick and hassle-free.

Whether you're lighting warehouses, factories, parking lots, or horticultural grow spaces, this kit delivers the durability, performance, and safety certifications you expect from Keystone.

Specifications

Feature	Details
Lamp Type	400W High Pressure Sodium (ANSI S51)
Input Voltage	Quad Tap – 120V / 208V / 240V / 277V
Circuit Type	Constant Wattage Autotransformer (CWA)
Internal Ignitor	No (Requires external ignitor)
Recommended Ignitor	XG-02 (External)
Frequency	60 Hz
Power Regulation	±10%
Recommended Fuse (A)	15 / 8 / 8 / 5 (by voltage)
Insulation Class	180°C
Capacitor	55 µF
Capacitor Voltage Rating	300V
Capacitor Temp Rating	90°C
Winding Materials	Copper / Aluminum
Max Distance to Lamp	10 ft (3.05 m)
Agency Certifications	RU, cRU
Warranty	2 Years

Specification Document

Spec Sheet

Download Full Datasheet

Product Identity

Brand Keystone
Item number HPS-400A-Q-KIT 3/1
UPC 890949011621
Product Type Ballasts
Warranty 2 Years

Electrical

Input Voltage Quad Tap (120/208/240/277)
Wattage 400 Watt
Power Factor High

Size & Weight / Finish

Light Output & Performance

Certification

RoHS Compliant Yes

Wireless Connection

Type

Ballast Type Magnetic High Pressure Sodium

Included

Suitable

Warranty

Manufacturer Warranty Information

Keystone HPS-400A-Q-KIT – 400W S51 Ballast - Multi-Tap 120–480V provides a comprehensive 5-Year Manufacturer Warranty on this product. We stand by our engineering; this product is warranted for as long.