Brand: Intermatic | Manufacturer Part Number: PX300S | Big Frog Supply SKU: PX300S
Product Overview
The Intermatic PX300S is a 300-watt safety transformer designed to supply compatible pool, spa, underwater, fountain, and landscape-lighting fixtures with low-voltage power. It accepts a 120 VAC, 60 Hz input and provides selectable 12, 13, or 14 VAC secondary outputs. Its 300-watt capacity supports larger combined fixture loads than the 100-watt PX100S while retaining the compact 7.25-by-5.25-inch enclosure footprint.
A grounded shield separates the primary and secondary windings, and built-in thermal circuit protection temporarily disconnects power during an overload. The brown stainless-steel Type 3R enclosure is the defining difference between PX300S and the beige steel PX300, providing added corrosion resistance for properly installed indoor or outdoor applications. Ten combination knockouts support conduit routing. The transformer does not include a timer, junction box, lighting fixtures, or the optional ET-NF noise filter.
Key Features
- 300-watt pool and spa safety transformer
- 120 VAC primary input
- Selectable 12, 13, and 14 VAC outputs
- Grounded shield between windings
- Temporary built-in overload protection
- Brown stainless-steel Type 3R enclosure
- Top and bottom mounting brackets
- Ten combination 1/2-inch and 3/4-inch knockouts
Common Uses
- Multi-fixture pool and spa lighting
- Underwater and fountain fixtures
- Low-voltage landscape-lighting systems
- Corrosion-resistant transformer installations
Technical Specifications
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Maximum capacity: 300 W
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Primary input: 120 VAC, 60 Hz
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Input current: 3 A
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Secondary outputs: 12, 13, or 14 VAC
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Enclosure: Brown stainless-steel Type 3R
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Knockouts: Ten combination 1/2-inch and 3/4-inch openings
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Optional noise filter: ET-NF, sold separately
Dimensions
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Height: 7.25 inches
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Width: 5.25 inches
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Depth: 4.5 inches
Installation Notes
Confirm combined fixture wattage, required output tap, conductor length, voltage drop, transformer placement, conduit, bonding, grounding, and junction-box requirements. Pool and spa lighting systems should be installed by a qualified professional. Do not exceed the 300-watt capacity.
Frequently Asked Questions
How does PX300S differ from PX300?
Both provide 300 watts, but PX300S uses a stainless-steel enclosure while PX300 uses beige steel.
What output voltages are available?
Selectable 12, 13, and 14 VAC outputs are provided.
Is the optional noise filter included?
No. The ET-NF noise filter is sold separately.
Why Buy This Product from Big Frog Supply?
The PX300S combines 300-watt capacity with Intermatic’s stainless enclosure for installations where corrosion resistance is a priority. Big Frog Supply clearly identifies the exact suffix, enclosure material, output taps, dimensions, and accessory exclusions so it is not mistaken for the beige PX300.
Color Beige Input Voltage Range(s) 3 A, 120 VAC, 60 Hz
Enclosure Type 3R Brown stainless steel Transformer Output Voltage 12 VAC, 13 VAC, 14 VAC
Maximum Power Consumption (W) 300 W Warranty Period 1-Year limited
Knockout Dimensions Back (2) combination 1/2" - 3/4" Knockout Dimensions Bottom (4) combination 1/2" - 3/4"
Knockout Dimensions Left (2) combination 1/2" - 3/4" Knockout Dimensions Right (2) combination 1/2" - 3/4"
Transformer Input Voltage 3 A, 120 VAC, 60 Hz Transformer Output Voltage 12, 13, 14 VAC
Product Depth (in) 4.5 Product Depth (mm) 114.3
Product Height (in) 7.25 Product Height (mm) 184.2
Product Width (in) 5.25 Product Width (mm) 133
Unit Carton Height (in) 7.88 Unit Carton Length (in) 5.69
Unit Carton Weight (lb) 10.5 Unit Carton Width (in) 4.56
