Q: Plug broken. Safe for replacement? Pins are different

asked by on

I have a sony vaio laptop but the plug in it has broke. The original plug was a 5amp fuse ss145/a. And was 250w 2.5v. The replacement plug I found was also 250w 2.5v and a 5amp fuse ss145/a. The plugs are exactly the same but just different branded and the top pin is metal like the other pins on the replacement plug unlike the original broken charger where the top pin is just black. I just wanted to know if this is safe to plug into my laptop. I plugged it in and it works but in the long run is it safe?

Although, I am not an electronics expert by any means, there are some basic electricity concepts that should apply in this case. First we need to identify what the ratings on the plug pertain to:

Amp - an ampere is the unit for measuring electricity. The accepted standard unit used for measuring how fast an electric current flows.

Volts - Electrical pressure is measured in Volts. How difficult it is to move electrons through a circuit is called resistance. Electrical resistance is measured in Ohms.

Watt – the basic unit of electric, mechanical, or thermal power in the SI and MKS systems, equal to one joule per second or 10 ergs per second (of a horsepower): for electric power it is equal to one volt-ampere.

Electricity is the flow of electrons through a conductor like a wire. The rate at which electricity flows is measured as an electric current. The electric current is measured in amps. What makes the current flow? In your case, the power cord (2.5v) is what creates the pressure to push the current through the power cord. The pressure is the voltage. If the pins on the plug are the same, this plug should work. The only question is the black pin on the top which may be purposely insulated for some reason. This may be worth looking into in case there is a necessity for this based upon the Sony Vaio manufacturer specs. Outside of the black insulated pin, everything else should work just the same. I would suggest looking into the insulated black pin however, before using this cord long term as it may protect against things like the cord overheating when charging, etc.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Plug broken. Safe for replacement? Pins are different

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Electrical problems with my car. The power windows, mirrors, infotainment, and the driver seat all aren't working.

Hi there. Since all of the items are located in the cabin area of the vehicle, look for a loose or broken ground wire from the cab to the frame or fuse box. There could be a pinched wire in...

Q: The radio will not power on. 2001 VW Passat

Hi there - first task is to check the fuse which powers the radio. If the fuse is good, check the operation of other devices powered by the same fuse for operation. If the rest work, then the problem is...

Q: Low beams not working

If the headlamp connector is plugged into the new unit, everything should work as designed. Looking at the wiring diagram for your vehicle, I see that the right hand and left hand low beams use separate fuses, so a blown...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...