Product Overview
Leviton OSP20-DA0 Power Pack for Occupancy Sensors – Unused
This is a Leviton OSP20-DA0 power pack designed to provide low-voltage power and relay switching for compatible Leviton occupancy sensors in commercial lighting control systems.
The OSP20-DA0 is the quiet backbone behind countless sensor-controlled lighting installations. It takes line voltage, delivers regulated 24 VDC to sensors, and handles the actual load switching with a relay built for high in-rush environments common to fluorescent and LED lighting.
Product Condition
Unused, new old stock. This power pack has never been installed or placed into service. It remains in unused condition and was kept in manufacturer packaging.
Product Overview
The Leviton OSP20-DA0 is part of the OSP/OSA series power packs, combining a Class 2 low-voltage power supply with an internal load relay. It accepts a wide range of commercial input voltages and provides regulated 24 VDC to one or more compatible occupancy sensors, while the relay switches the connected lighting load. The unit is designed for installation in junction boxes, luminaires, or plenums.
Key Features
- 20 A power pack with integrated relay for occupancy-based lighting control
- Supplies regulated 24 VDC output, up to 150 mA, for connected sensors
- Accepts 120–277 VAC input at 50/60 Hz
- Relay rated up to 20 A at 120/277 V for fluorescent, incandescent, and LED loads
- Latching relay design maintains state through power interruptions
- Zero-crossing circuitry to reduce contact arcing and extend relay life
- UL 2043 plenum-rated enclosure suitable for air-handling spaces
- Color-coded leads for line, load, neutral, and Class 2 low-voltage wiring
Applications
- Commercial offices requiring occupancy-based lighting control
- Retail and classroom lighting systems using low-voltage sensors
- Lighting retrofits where a combined power supply and relay is needed
- Multi-sensor installations powered from a single 24 VDC source
- Bi-level or multi-zone lighting control with add-on relay packs
- General-purpose building automation lighting interfaces
Frequently Asked Questions
What does the OSP20-DA0 actually do?
It provides regulated 24 VDC power to compatible occupancy sensors and switches the connected lighting load through its internal relay.
How many sensors can it power?
The total sensor load must remain under 150 mA. Typical PIR or wall sensors draw around 10–15 mA each, but exact counts should be calculated from sensor datasheets.
Is this a line-voltage sensor?
No. The OSP20-DA0 is a power pack and relay. It requires compatible low-voltage occupancy sensors to control its switching output.
What types of loads can the relay handle?
The internal relay is rated up to 20 A at 120/277 V for common commercial lighting loads, including fluorescent and LED fixtures.
Is this unit unused?
Yes. This is unused new old stock that has never been installed or energized.
Built to sit quietly above the ceiling and just keep working, this Leviton power pack is ready to return to service wherever dependable sensor-driven lighting control is still the expectation.
