PCB Electric Test
PCB electrical testing helps detect open circuits and short circuits before shipment. At PCBfabrication.com, two common PCB electric test methods are used: Flying Probe Test and Test Fixture Electrical Test.
Why PCB Electric Testing Is Important
PCB electric testing is an important quality-control step in PCB manufacturing. It helps verify whether the finished board matches the intended electrical network and reduces the risk of defective boards being shipped to customers.
The suitable test method depends on several factors, such as PCB quantity, whether the product will be reordered, required test efficiency, and tooling cost.
1. Flying Probe Test
Flying Probe Test uses moving probes instead of a dedicated fixture. Motor-driven probes contact selected test points on the PCB and perform electrical measurements.
Because no custom fixture is required, this method is especially suitable for prototypes, engineering samples, and small-batch PCB production.
- Main advantage: No dedicated test fixture is required.
- Best for: Prototype PCB orders and small-batch production.
- Typical use: Open circuit and short circuit testing.
- Board thickness range mentioned: 0.4mm to 3.2mm.
2. Test Fixture Electrical Test
Test Fixture Electrical Test requires a customized fixture made for one specific PCB design. The fixture is then installed on a testing machine to perform open and short circuit inspection.
The initial tooling cost is higher than Flying Probe Test, but the fixture can usually be reused for future repeat production of the same PCB design.
- Main advantage: Higher testing efficiency in repeated production.
- Best for: Medium-volume and high-volume PCB production.
- Cost characteristic: Higher first-time cost, reusable later.
- Suitable case: Stable PCB designs with repeated manufacturing demand.
Flying Probe Test vs Test Fixture Test
| Item | Flying Probe Test | Test Fixture Test |
|---|---|---|
| Initial Cost | Lower | Higher due to fixture tooling |
| Fixture Requirement | No dedicated fixture needed | Dedicated fixture required |
| Testing Efficiency | Suitable for small quantity | Better for repeated batch production |
| Best Use Case | Prototype and small-batch PCBs | Repeat orders and volume production |
| Reuse Value | Not applicable | Fixture can usually be reused |
How to Choose the Right PCB Electric Test Method
In general, Flying Probe Test is a practical choice for prototype PCB orders, engineering validation, and small-batch production because it avoids fixture tooling cost.
Test Fixture Electrical Test is usually a better choice for repeat production and larger-volume PCB orders, where higher testing efficiency can offset the initial fixture cost.
Which Test Is Better for Your PCB Order?
There is no single test method that is always better. The better choice depends on your order structure.
- If your order is a prototype or a small batch, Flying Probe Test is usually more practical.
- If your PCB will be reordered many times or produced in larger volume, Test Fixture Test is usually more efficient.
- If you want to reduce the first-time tooling cost, Flying Probe Test is usually the simpler option.
- If you want faster repeated electrical testing for the same PCB design, a dedicated fixture may be a better long-term choice.
Need a PCB Quote?
If you are ready to submit your PCB design, you can go directly to our online quote page. If you are not sure which test method is more suitable, you can also contact us first.