Are Bosch relays good?

Bosch relays are consistently reliable and perform switching operations in both automobiles and off-highway applications. The full program includes 12- and 24-volt relays in a variety of sizes. Bosch has been producing relays for vehicles, and a variety of other applications for more than 40 years.

How does a Bosch relay work?

Also known as the Bosch relay, the SPDT has a common, movable contact that moves between two fixed contacts, termed Normally Open and Normally Closed. When the relay is off, the common and Normally Closed contacts are connected. When the relay is engergized the common is switched over to the Normally Open contact.

What happens when a starter relay goes bad?

If your starter relay has gone bad, the electrical signal will never make it from the battery to the starter motor. As a result, your engine won’t turn over – no matter how many times you turn the key. A faulty relay often produces an audible clicking sound when you turn your car.

What is the purpose of a 12 volt relay?

In 12-volt automotive circuits, even small resistance amounts can cause significant voltage drop. Relays provide a solution by shortening the required length of the heavy-gauge, power-delivery wire from the battery or alternator to the load.

Is a starter relay and ignition relay the same thing?

In the case of a starter, the ignition switch signals the relay/solenoid (possibly by way of a computer) and the relay/solenoid switches on the starter circuit to engage the starter. Now the terms relay and solenoid are often used interchangeably and there is a lot of confusion about which is which.

What sends power to the starter relay?

A starter relay sends small electric power to the starter solenoid when you turn on the ignition key, while the solenoid draws a large current directly from the car batteries.

What is pin 86 on a relay?

Output for a Relay. Realizing that 85 and 86 are the coil pins, these pins will be transferring the current through the coil. 85 will be used to ground your relay, while 86 will be connected to the switchable power.

What do the numbers mean on a 12 volt relay?

Numbers of a Relay Note that each pin is numbered. 85 and 86 are the coil pins while 30, 87, and 87a are the switch pins. 87 and 87a are the two contacts to which 30 will connect. If the coil is not activated, 30 will always be connected to 87a.

What is pin 30 on a relay?

85 will be used to ground your relay, while 86 will be connected to the switchable power. 87 and 87a will be connected to your controlled accessories that you wish to turn on and off with your relay. 30 will then be the pin connected to your battery power.

How do I choose a relay size?

An easy way to determine the limit of a relay is to multiply the rated Volts times the rated Amps. This will give you the total watts a relay can switch. Every relay will have two ratings: AC and DC. You should determine the AC watts and the DC watts, and never exceed these ratings.

How many amps does a Bosch starter relay use?

Just a word of caution, this matches the original 75 amp specifications for the Bosch starter relay on the BMW bike, but it’s a bit light (not the fault of the relay, but of the guy that designed the circuit). Just what I needed. An upgrade on a peterbilt 378 semi truck.

Are Bosch 12 volt relays reliable?

Bosch relays are consistently reliable and perform switching operations in both automobiles and off-highway applications. The full program includes 12- and 24-volt relays in a variety of sizes. Bosch has been producing relays for vehicles, and a variety of other applications for more than 40 years.

What are Bosch micro relays?

A compact design with nominal 12- or 24-volts. Bosch micro relays are used in a wide range of vehicles. They perform switching operations and allow rated switching currents of up to 25 A. Thanks to their design, they are an ideal solution for quick and easy service tasks. A compact design with nominal 12- or 24-volts.

How hot can Bosch relays get?

In addition to their long service life – made possible through meticulous processing and the use of high-quality materials allowing up to 250,000 switching cycles – Bosch relays are designed to withstand temperatures ranging from -40°F to up to +212°F (-40°C to up to +100°C). A compact design with nominal 12- or 24-volts.