Haltech Solid State Relay 100 AMP - HT-030202

The Haltech Solid State Relay 100 AMP (HT-030202) is a purpose-built electronic relay designed for high-frequency pulse width modulation (PWM) control in performance and motorsport applications. Whether you're running ECU-controlled fuel pumps, variable-speed cooling fans, auxiliary injectors, or other high-current accessories, this solid state relay from Haltech delivers reliable, precise switching where a conventional mechanical relay simply cannot keep up. It's a go-to solution for builders and tuners running Haltech ECU systems who need clean, high-frequency load control integrated into their wiring harness.

Key Features & Benefits

• High-Frequency PWM Control: Unlike traditional mechanical relays that cycle slowly, this solid state relay handles high-frequency PWM signals — making it ideal for variable-speed fan control, variable pump control, and auxiliary injector switching where precise duty-cycle management is critical.
• 100-Amp Capacity: Rated at 100 amps, this relay is built to handle high-current loads typical of electric fuel pumps, radiator fans, and other demanding accessories without heat-related failures common to undersized components.
• Includes 1K Pull-Up Resistor: The HT-030202 ships with a 1K pull-up resistor included, giving you a ready-to-wire solution without sourcing additional components separately.
• Solid State Design: No moving parts means no mechanical wear, no contact arcing, and a longer service life compared to traditional electromagnetic relays — particularly valuable in high-vibration motorsport environments.
• Haltech Ecosystem Compatibility: Designed by Haltech, this relay integrates cleanly into builds using Haltech Elite, Nexus, and other Haltech ECU platforms, following Haltech's solid state power switching wiring guides.
• Versatile Application: Suitable for auxiliary injectors, variable-speed fans, pump control, and virtually any other high-frequency switched load you want managed via ECU output.

Specifications

• Part Number: HT-030202
• Brand: Haltech
• UPC: 9356450002592
• Current Rating: 100 Amps
• Relay Type: Solid State
• Included: 1K Pull-Up Resistor
• Proposition 65: Yes — California Prop 65 notice applies

Fitment

The Haltech HT-030202 Solid State Relay is a universal electrical component — it is not vehicle-specific and does not mount to a particular make, model, or year. It is compatible with any build where an ECU or controller outputs a PWM signal to switch a high-current load. It is particularly well-suited for use alongside Haltech ECU systems (including Elite and Nexus series ECUs) but can be used in any application requiring solid state PWM power switching. Installation should follow Haltech's solid state power switching wiring guide (document HT-030202_IS) to ensure correct wiring configuration. If you have questions about whether this relay suits your specific build, our team is available to help.

What's in the Box

• 1x Haltech Solid State Relay 100 AMP (HT-030202)
• 1x 1K Pull-Up Resistor

Why Buy from ThreePiece.us

ThreePiece.us carries the Haltech HT-030202 Solid State Relay with free shipping on every order — no minimum required. We also offer financing through Affirm, so you can spread the cost of your build over time. Our team has extensive experience supporting performance and motorsport builds, and we're here to help you confirm compatibility or answer wiring questions before you buy. Reach out via our fitment help contact on the product page or call us directly — real enthusiasts are on the other end.

Frequently Asked Questions

What applications is the Haltech HT-030202 designed for?

The HT-030202 is designed for high-frequency PWM control of auxiliary injectors, variable-speed fans, variable-speed pumps, and similar high-current accessories that need to be switched via an ECU output. It is particularly well-suited for use with Haltech ECU systems.

Does it come with everything I need to wire it up?

The relay includes a 1K pull-up resistor. Haltech also provides a dedicated solid state power switching wiring guide (referenced as HT-030202_IS) that covers the correct wiring configuration. Additional wiring hardware — such as connectors, terminals, and fusing — would need to be sourced separately based on your specific installation.

Is this relay vehicle-specific, or is it universal?

The HT-030202 is a universal electrical component, not vehicle-specific. It can be used in any build — car, truck, motorcycle, or motorsport application — where you need PWM-controlled power switching for a high-current load.

Does ThreePiece.us offer financing on this product?

Yes — financing is available through Affirm at ThreePiece.us, allowing you to break up the purchase into manageable payments. Free shipping is also included on every order.