Seaflo 25A Bilge Pump Float Switch BS2503A 12V 24V 32V for 3000GPH+ Pumps
SEAFLO FLOAT SWITCH 25A (BS2503A)
Heavy-Duty Control for High-Flow Bilge Systems
The Seaflo BS2503A (03-Series) is a high-performance marine float switch specifically engineered to handle the high current demands of large-volume bilge pumps. Unlike standard switches that cap at 10A-15A, this heavy-duty model supports a maximum draw of 25 Amps, making it the ideal partner for 3000GPH, 3500GPH, and 3700GPH non-automatic pumps.
Key Features
- ✔ 25A Capacity: Supports high-flow pumps up to 25 Amps.
- ✔ Mercury-Free: Environmentally safe rolling ball mechanism.
- ✔ Multi-Voltage: Fully compatible with 12V, 24V, and 32V DC.
- ✔ Submersible: Sealed using advanced ultrasonic welding.
Technical Specs
| Model: | BS2503A (SFBS-25-03A) |
| Max Amps: | 25A (@ 12V) |
| Wire Gauge: | 14 AWG |
| Wire Length: | 1 Meter (3.3 ft) |
| Activation (On): | 45-55 mm (1.77"-1.97") |
| Deactivation (Off): | 20-25 mm (0.79"-0.98") |
Compatibility / Fitment Guide
| Make/System | Model/Application | Notes |
|---|---|---|
| Seaflo High-Flow | 3000GPH, 3500GPH, 3700GPH, 4700GPH | Direct pairing for non-auto pumps. |
| Universal Marine | Any DC Pump up to 25A draw | Compatible with 12V, 24V, and 32V. |
| Rule / Jabsco / Attwood | Manual/Non-Auto Bilge Pumps | Excellent aftermarket replacement. |
OEM Cross Reference
| Seaflo MPN | SFBS-25-03A |
| Internal SKU | BS2503A |
| EAN / Barcode | 6971170931873 |
Questions & Answers
Is this a genuine original part?
Yes, this is an authentic SEAFLO product, manufactured to the highest marine standards for high-amperage applications.
How do I know if it is compatible?
Check the current draw of your pump. If your pump draws 25 Amps or less, this switch is designed to handle it. It is primarily used for pumps with flow rates above 3000GPH.
What is the difference between BS2503A and BS2503B?
The BS2503A (this model) is the standard version without a filter/strainer housing. The 'B' model typically includes a detachable strainer housing to protect the float from debris.
Note: Always ensure electrical connections are made above the water level and sealed with marine-grade waterproof sealant (e.g., heat shrink butt connectors).
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