Kleinn Sealed 40-Amp/ 5-Post/ SPDT Relay (12-volt)

The Kleinn Model 340 is a premium, universal standard automotive electrical relay engineered to provide safe, reliable, and high-capacity power switching within your high-pressure onboard air system. Featuring a heavy-duty, Single Pole Double Throw (SPDT) 5-prong configuration enclosed in a protective black ABS plastic housing, this relay is designed to withstand the demanding conditions of automotive engine bays and chassis environments. Rated for a robust 30 Amps of continuous current and up to 40 Amps momentarily, it acts as a crucial safety barrier—allowing a low-amperage dash switch to cleanly trigger high-draw pneumatic components, such as your air compressor or high-performance solenoid valves, while completely safeguarding your vehicle's delicate factory wiring.

Part Type

Accessory Power Relay

• 30 amp continuous, 40 amp momentary
• 5-post connections
• Black ABS housing
• Single Pole Double Throw (SPDT)

Note for Australian and European Markets

Unless otherwise stated, this product may be supplied with US-specification electrical connectors or plugs and may be designed for use with 110 V AC systems.

Battery chargers, maintainers, tenders, and similar electrical equipment are often produced for the North American market and may require an appropriate cable, adapter, transformer, or voltage converter for use in regions operating on 220–240 V AC mains power (such as Australia and Europe).

Before connecting or operating any electrical device, verify the voltage and plug type compatibility for your region.

If you are uncertain, please contact StreetFX support prior to purchase or use.

Returns are not accepted for special-order products or damage caused by use with incorrect voltage or connectors.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Relay, 30/40 Amp, 12 Volts, Double Pole, Blade, 5 Terminal, Universal, Each

Kleinn air horn relays provide the power protection and load-handling ability your air horns need. Designed to handle the heavy amperage draw from the electric or compressed air-powered horns, these relays are sure to keep you honking and the electrical system happy.