Is the unit really 5" x 5" x 5" or is that the box it comes in?

It is no where near 5x5x5" the unit itself is more close to 1x1x1". Be aware though when I purchased this unit I received a dual pole and not a single pole as advertised (i received a relay with 5 prongs instead of 4) and still have not received the right model after Amazon provided 2 more attempts at reimbersment. Though for my application it can still be used (just slower switch reaction do to no power being provided on the 5th prong)

Are these relays suitable for outside the cab of a vehicle. It will receive light moisture at times.

I installed mine under the hood.

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HELLA 4RA 965 400-001 Relay 12V 30A SPST BKT Black

HELLA 4RA 965 400-001 Relay 12V 30A SPST BKT Black

Product ID: 18153990

Details

Connector Type
Plug-In
Contact Material
Copper
Contact Type
Spst
Current Rating
30 Amps
Mounting Type
Plug In Mount

⚡12V coil voltage for seamless automotive integration

🔌30A max switching current for heavy-duty power control

🛠️Plug-in mounting bracket for effortless installation

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VT5315

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Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Connector Type
Plug-In
Contact Material
Copper
Contact Type
Spst

Description

⚡ Power your drive with HELLA precision—because your ride deserves the best!

BUILT TO ENDURE - Operates flawlessly from -40°C to 125°C, engineered for extreme conditions
TRUSTED OEM QUALITY - Manufactured under HELLA’s stringent standards, ensuring top-tier durability and performance
PLUG PLAY SIMPLICITY - Mounting bracket and plug-in design make upgrades and replacements hassle-free
PRECISION POWER CONTROL - Handles up to 30A with reliable SPST switching for your critical automotive circuits
VERSATILE COMPATIBILITY - Perfect for engine control units, fuel pumps, fan motors, and more—future-proof your ride

The HELLA 4RA 965 400-001 is a 12V, 30A SPST relay featuring a plug-in mounting bracket for easy installation. Engineered to meet ISO standards, it delivers reliable switching performance across a wide temperature range (-40°C to 125°C). Ideal for automotive applications like engine control units, fuel pumps, and fan motors, this relay combines OEM quality with versatile compatibility to keep your vehicle running smoothly.

Specifications

ASIN	B004NIKVWC
Best Sellers Rank	#137,806 in Automotive ( See Top 100 in Automotive ) #192 in Automotive Replacement Accessory Power Relays
Brand	Hella
Brand Name	Hella
Coil Voltage	12 Volts
Connector Type	Plug-In
Contact Current Rating	30 Amps
Contact Material	Copper
Contact Type	Spst
Current Rating	30 Amps
Customer Reviews	4.6 out of 5 stars 859 Reviews
Global Trade Identification Number	00760687123125
Included Components	Relay
Item Type Name	Light Accessories and Wiring
Item Weight	0.07 Pounds
Manufacturer	Hella
Maximum Switching Current	30 Amps
Maximum Switching Voltage	12 Volts
Minimum Switching Voltage	12 Volts
Model	4RA 965 400-001
Mounting Type	Plug In Mount
Number of Terminals	3
Operation Mode	Automatic
Part Number	965400001
Specification Met	[Ferentially Met Industry Standards]
UPC	760687123125
Unit Count	1.0 Count
Warranty Description	Manufacturer Warranty
Wattage	480 watts

Reviews

J**T

27.10.2024

C**N

23.01.2026

R**O

10.12.2025

D**S

31.05.2025

M**N

23.09.2015

N**.

16.08.2021

L**T

25.07.2018

J**R

31.12.2019

M**A

25.09.2022

J**N

28.11.2021

J**R

8.11.2025

C**N

10.02.2026

S**H

7.11.2018

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VT5315

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