Can I use a smaller fuse?

Yes, you totally can. The overall load through the circuit should be about 80% of the rating of the fuse. Hope this helps.

is the fuse for output power to the accessory ?

The fuse is protecting the source voltage supply on the #30 terminal. In theory this also protests the accessory wired to the #87 terminal because if the source sees a spike and blows the fuse the output will not see any current. To be safe you can also fuse anything connected to the accessory side of the relay on the #87 terminal independently.

I have two 18w led aux lights hooked up to ome of these and its jimped into my parking lights. Why is ut buzzing?

The only thing i can think is the holding coil. Do the lights flicker

These relays have built -in peak suppression diode?

No, these relays do not have built in flyback diodes.

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ONLINE LED STORE OLS 6 Pack 30A Fuse Relay Switch Harness Set - 12V DC 4-Pin SPST Automotive Relays 14 AWG Hot Wires

ONLINE LED STORE OLS 6 Pack 30A Fuse Relay Switch Harness Set - 12V DC 4-Pin SPST Automotive Relays 14 AWG Hot Wires

Product ID: 318576443

Details

Connector type
Plug-In
Contact material
Silver
Contact type
Normally Open
Current rating
30 Amps
Mounting type
Panel Mount

⚡30A high switching power

🔌14AWG heavy-duty wiring

🛡️Built-in 30A fuse protection

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263.14 DT

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power your ride with pro-grade relays — don’t get left in the dark!

COMPLETE 6 PACK SET - Six relays, harnesses, and fuses included to upgrade multiple systems at once
SAFETY FIRST BUILT IN - Integrated fuse socket with included 30A blade fuse protects your circuits instantly
PLUG AND PLAY SIMPLICITY - Bosch style 4-pin SPST relay with easy plug-in connectors for fast installation
POWER UP WITH CONFIDENCE - 30A high switching capability ensures reliable performance under heavy loads
DURABLE READY TO CONNECT - Heavy-duty 14AWG wires for superior current handling and longevity

The ONLINE LED STORE 6 Pack 30A Fuse Relay Switch Harness Set features Bosch style 4-pin SPST automotive relays with heavy-duty 14AWG wiring and built-in 30A fuse sockets. Designed for 12V DC systems, this set delivers reliable high-current switching with easy plug-in installation, making it ideal for upgrading or protecting automotive electrical circuits. Includes six complete relay harnesses and blade fuses for multiple applications.

Specifications

ASIN	B01NBAO1SA
Best Sellers Rank	#123,384 in Automotive ( See Top 100 in Automotive ) #32 in Automotive Starter Relays
Brand Name	ONLINE LED STORE
Coil Resistance	8E+1 Milliohms
Coil Voltage	12 Volts (DC)
Connector Type	Plug-In
Contact Current Rating	30 Amps
Contact Material	Silver
Contact Type	Normally Open
Country Of Origin	China
Current Rating	30 Amps
Customer Reviews	4.7 4.7 out of 5 stars (2,245)
Item Weight	0.8 Pounds
Manufacturer	ONLINE LED STORE
Maximum Switching Current	30 Amps
Minimum Switching Voltage	12 Volts (DC)
Model	PSZACCEPS179R
Mounting Type	Panel Mount
Operation Mode	Manual
Part Number	PSZACCEPS179R
UPC	816165023880
Wattage	18 watts

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