A MICRO3 fuse tap is an add-a-circuit adapter designed to add a separately fused accessory circuit to a vehicle fuse box that uses MICRO3 blade fuses. It provides two fuse positions: the original fuse continues to protect the vehicle's existing circuit, while a second fuse protects the added accessory circuit.

A MICRO3 fuse tap is commonly used for low-current automotive accessories such as dash cameras, GPS trackers, USB chargers, LED lighting and vehicle monitoring equipment.

How Does a MICRO3 Fuse Tap Work?

A MICRO3 fuse tap allows two separately fused circuits to use one existing fuse box position.

The original fuse continues to protect the vehicle's existing circuit. A second fuse protects the newly added accessory circuit.

The wire lead from the fuse tap supplies power to the added device.

Typical circuit layout:

Fuse Box → MICRO3 Fuse Tap → Original Circuit + Accessory Circuit

The accessory fuse should be selected according to the electrical load and wire capacity of the new circuit.

Compatible MICRO3 Blade Fuses

This fuse tap is designed specifically for MICRO3 blade fuses.

Before installation, confirm:

• Fuse type

• Fuse dimensions

• Rated current

• Rated voltage

• Original circuit requirement

• Accessory load

MICRO3, MICRO2, MINI and Low Profile MINI fuses use different physical formats and should not be treated as interchangeable.

Do not select a fuse only by color. Always confirm the current rating marked on the fuse.

Does Fuse Tap Orientation Matter?

Yes. Fuse tap orientation can affect how current flows through the original and accessory circuits.

A vehicle fuse slot normally has a power-supply side and a load side. The powered side should be identified before installation so the fuse tap can be installed according to the intended circuit design.

Do not choose the installation direction only based on which way the fuse tap is easier to insert.

Always follow the vehicle and accessory manufacturer's electrical requirements.

How to Choose the Correct Fuse Tap Size?

The correct fuse tap should match the physical fuse type installed in the vehicle fuse box. MICRO3, MICRO2, MINI, Low Profile MINI and ATO/ATC fuse taps are designed for different fuse formats and are not interchangeable simply because they have the same current rating.

Before selecting a fuse tap, verify the fuse type, physical dimensions, terminal configuration, voltage rating and the vehicle fuse-box requirements.

Typical Applications

The MICRO3 fuse tap is suitable for adding low-current automotive accessories such as:

• Dash cameras

• GPS trackers

• USB chargers

• LED lighting

• Vehicle monitoring devices

• Interior accessories

• Fleet tracking equipment

• Aftermarket electronics

The selected fuse and wire must match the accessory current requirement.

MICRO3 Fuse Tap vs MICRO2 Fuse Tap

MICRO3 and MICRO2 fuse taps perform the same basic add-a-circuit function but are designed for different fuse formats.

Always match the fuse tap to the fuse type used in the vehicle fuse box.

MICRO3 Fuse Tap vs MINI Fuse Tap

MICRO3 and MINI fuse taps differ mainly in fuse size and terminal configuration.

The correct fuse tap should be selected according to the physical fuse format, not only the current rating.

Wire, Terminal and Construction

Nylon Housing

The nylon housing provides insulation and mechanical support for the fuse and terminal structure.

Metal Terminals

Tin-plated brass terminals provide stable electrical contact between the fuse box, fuse and accessory circuit.

Automotive Wire

Different wire gauges and cable lengths can be supplied according to customer requirements.

Reliable terminal locking and correct crimping are important for stable electrical performance.

Installation Guide

A typical installation process is:

1. Turn off the vehicle and disconnect power when required.

2. Identify a suitable MICRO3 fuse position.

3. Remove the original fuse.

4. Install the original fuse into the corresponding fuse tap position.

5. Select the correct accessory fuse.

6. Install the accessory fuse into the second position.

7. Identify the powered side of the fuse slot.

8. Insert the fuse tap in the correct orientation.

9. Connect the wire lead to the accessory circuit.

10. Confirm the ground connection.

11. Restore power and test the circuit.

Do not increase the original fuse rating simply to support an added accessory.

Quality Control

Autoido applies inspection throughout fuse tap production.

Typical inspection items include:

• Housing dimensions

• Terminal positioning

• Terminal retention

• Wire length

• Crimp quality

• Electrical continuity

• Fuse insertion and retention

• Product assembly

• Packaging inspection

Customized inspection requirements can also be applied for OEM projects.

OEM/ODM and Custom Packaging

Autoido supports OEM and ODM services for MICRO3 fuse taps.

Customization options can include:

• Wire gauge

• Wire length

• Wire color

• Output terminal

• Stripping length

• Product labeling

• Customer logo

• Private-label packaging

• Retail packaging

• Bulk packaging

Customers can provide drawings, samples or technical requirements for evaluation.

Why Choose Autoido

Autoido specializes in automotive fuses, fuse taps, fuse holders and other circuit protection products.

Our capabilities include:

• More than 20 years of fuse production and development experience

• In-house R&D capability

• Product testing capability

• OEM and ODM support

• Mold development

• Wire and terminal customization

• Custom packaging

• Bulk production

• Technical support for B2B customers

Autoido supplies automotive circuit protection products for OEM, aftermarket, distributor and electrical accessory applications.

Frequently Asked Questions

What is a MICRO3 fuse tap?

A MICRO3 fuse tap is an add-a-circuit adapter designed to create an additional fused circuit from an existing MICRO3 fuse box position.

What is a MICRO3 add-a-circuit used for?

It is used to add accessories such as dash cameras, GPS trackers, USB chargers and LED lighting without cutting the original vehicle wiring.

What fuse type is compatible with this fuse tap?

This product is designed for MICRO3 blade fuses.

Is MICRO3 the same as MICRO2?

No. MICRO3 and MICRO2 fuses use different terminal structures and require different fuse taps.

Are MICRO3 and MINI fuse taps interchangeable?

No. They are designed for different fuse sizes and fuse box configurations.

Can a 32V MICRO3 fuse tap be used in a 12V vehicle?

A 32V-rated fuse tap can generally be used in a 12V automotive system when all other electrical specifications and application requirements are satisfied.

Does fuse tap orientation matter?

Yes. The power-supply side of the fuse slot should be identified before installation so the fuse tap can be oriented correctly.

How do I choose the accessory fuse rating?

Choose the fuse according to the accessory current, wire capacity and circuit requirements.

Do not simply copy the rating of the original vehicle fuse.

What wire gauge is available?

Different wire gauges can be supplied according to the product configuration and customer requirements.

Can Autoido customize wire length and terminals?

Yes. Wire gauge, cable length, terminal type and other specifications can be customized for OEM projects.

Does Autoido provide OEM packaging?

Yes. Autoido supports private-label, retail and bulk packaging for MICRO3 fuse tap orders.

Can a MICRO3 fuse tap be used with a MICRO2 fuse?

No. MICRO3 and MICRO2 use different fuse formats and terminal configurations. A MICRO3 fuse tap should be used with compatible MICRO3 blade fuses and a compatible vehicle fuse-box position.