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Relays / Fuses
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
The OE Match Fuse Box is an original-style Bakelite 12-pole fuse box designed for classic Porsche 356 electrical systems.
Fits:- Porsche 356 A/B/C 1.5-1.6 01/55-12/65
Manufactured to reproduce the appearance and layout of the period fuse box, it provides a suitable replacement for an original unit that has become cracked, burnt, corroded or electrically unreliable while helping retain the authentic appearance of the vehicle's electrical installation.
The fuse box forms a central part of the vehicle's electrical protection system. Individual electrical circuits are routed through replaceable fuses so that excessive current can interrupt the affected circuit before wiring or electrical components suffer more serious damage.
On vehicles now approaching or exceeding sixty years of age, deterioration of the original fuse block, terminals and connections can contribute to intermittent electrical problems, excessive resistance and heat generation.
Replacing a damaged fuse box helps restore secure fuse retention, reliable electrical connections and proper circuit protection.
What This Product Does:
The fuse box provides a secure location for the vehicle's electrical fuses and associated wiring connections.
It is designed to:
- Hold the vehicle's individual electrical fuses securely.
- Distribute electrical power between protected circuits.
- Provide connection points for the vehicle wiring harness.
- Allow each circuit to be protected by the correct fuse rating.
- Interrupt electrical current if a protected circuit becomes overloaded.
- Help protect wiring from excessive current.
- Provide convenient access for fuse inspection and replacement.
- Replace a cracked, burnt or corroded original fuse block.
- Maintain the period-correct appearance of the Porsche 356 electrical system.
- Support reliable operation of lighting and other fused electrical equipment.
Symptoms Of Wear Or Failure:
Possible symptoms include:
- Intermittent electrical equipment operation.
- Lights occasionally cutting out.
- Electrical accessories working when the fuse is moved or touched.
- Poor fuse contact.
- Fuses sitting loosely in their holders.
- Corroded fuse terminals.
- Green or white oxidation around electrical connections.
- Burnt or blackened terminals.
- Heat discolouration.
- Cracked Bakelite housing.
- Broken fuse-retaining clips.
- Loose wiring terminals.
- Melted or damaged fuse ends.
- Fuse box becoming unusually warm.
- Voltage drop across a fuse connection.
- Electrical circuits operating weakly or inconsistently.
- Complete loss of an otherwise functional circuit.
- Evidence of previous overheating or electrical repair.
Why Replacement Matters:
A deteriorated fuse box can undermine the reliability of the entire electrical system.
Replacing a damaged unit helps restore:
- Secure fuse retention.
- Clean electrical contact.
- Reliable circuit continuity.
- Proper circuit protection.
- Reduced electrical resistance.
- Reduced risk of localised overheating.
- Correct wiring support.
- Reliable operation of fused electrical equipment.
- Period-correct appearance.
For a restored Porsche 356, replacing an unreliable or badly damaged fuse block can prevent repeated electrical troubleshooting and provide a dependable foundation for the rest of the wiring system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
64461280100
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Fits:
Porsche 356 1960-65 Carrera / 2000 GT
Porsche 911 1965-68
* Please check and match the part number of your relay in your car before ordering.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PCG61510110
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Fits:
Porsche 356 1960-65 Carrera / 2000 GT
Porsche 911 1965-68
* Please check and match the part number of your relay in your car before ordering.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PCG615101A
The product you are viewing cross references to these numbers
- Porsche 356C 1963-65
Fits:
For use on Porsche 356 C with 12 Volt (1963 to 1965).
The set comprises:
2x high beam/low beam light (45/40W),
2x indicator light, tail/brake light (18W),
2x position light (4W),
1x licence plate light (5W),
1x reversing light (25W),
2x safety fuse (8A),
2x safety fuse (25A).
The packaging comprises a white Porsche Classic designer metal box with foam inserts.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PCG35620000
The product you are viewing cross references to these numbers
Relays & Fuses – Reliable Electrical Protection for Porsche Vehicles
Relays and fuses are vital components of your Porsche’s electrical system, responsible for controlling power distribution and safeguarding critical circuits. Relays act as electronic switches that manage high-current loads efficiently, while fuses protect your electrical components by breaking the circuit during power surges or faults.
At Design911, we stock an extensive range of genuine and high-quality relays and fuses suitable for all Porsche models, including 911, Boxster, Cayman, Cayenne, Macan, and Panamera. Each part is precision-engineered for compatibility, durability, and performance, ensuring your Porsche’s electrical system functions safely and efficiently.
What Do Relays and Fuses Do?
These small but essential components perform critical roles
in your vehicle’s electrical and safety systems:
- Relays:
Act as electrical switches that control power to key components like the
cooling fan, fuel pump, headlights, and ignition system.
- Fuses:
Protect circuits by preventing overloads or short circuits, ensuring safe
operation of electrical systems.
- Together: They maintain stable power distribution and prevent damage to sensitive electronics.
Proper relay and fuse function is essential to keeping your Porsche’s complex electrical systems running reliably under all driving conditions.
Why Do Relays and Fuses Fail?
Over time, relays and fuses can degrade due to heat,
vibration, or electrical stress. Common causes of failure include:
- Corrosion
or oxidation on terminals.
- Overheating
caused by excessive current draw.
- Electrical
arcing within relay contacts.
- Fuse
fatigue from repeated current surges.
- Moisture or contamination affecting performance.
When a relay or fuse fails, systems such as your fuel pump, headlights, air conditioning, or ignition may stop working altogether — leading to performance issues or complete electrical failure.
Why Replace Faulty Relays and Fuses?
A failed relay or blown fuse can cause major system malfunctions or even damage other components. Replacing them with manufacturer-quality parts ensures consistent voltage flow, electrical safety, and reliable system operation.
Benefits of replacement include:
- Restored functionality to critical electrical systems.
- Protection against short circuits and overloads.
- Reduced risk of electrical damage and fire hazards.
- Long-lasting, dependable performance.
All our relays and fuses are designed using heat-resistant materials and precision contacts, ensuring optimal conductivity, quick response times, and extended service life.
