Ordering the wrong circuit breaker can lead to wasted time, delayed repairs, and compatibility problems. Before purchasing a replacement, you need to identify the existing circuit breaker as accurately as possible.
The good news is that most circuit breakers have identifying information printed or molded directly onto the breaker. By carefully recording this information, you can make the replacement process much easier.
The most important details typically include the:
- Manufacturer
- Model or catalog number
- Breaker series
- Amp rating
- Voltage rating
- Number of poles
- Interrupting rating
- Mounting configuration
- Panel compatibility
- Product type
This guide explains how to identify a circuit breaker step by step and what information you should collect before ordering a replacement.
Safety note: Electrical panels can contain dangerous and potentially lethal voltages, including when some breakers are switched off. Do not remove or handle a breaker to read its label unless you are qualified to do so. When necessary, have a qualified electrician identify the equipment for you.
Why Is It Important to Identify a Circuit Breaker Correctly?
A circuit breaker is more than its amp rating.
For example, two breakers could both be:
200 amps
but have different:
- Voltage ratings
- Pole configurations
- Interrupting ratings
- Breaker series
- Mounting systems
- Panel compatibility
- Trip characteristics
They may therefore not be interchangeable.
Identifying the complete breaker before ordering helps you find a replacement that matches the original equipment and the electrical system.
What Information Do You Need to Identify a Circuit Breaker?
Before ordering a replacement, try to record these specifications:
| Information | Example |
|---|---|
| Manufacturer | GE |
| Model/Catalog Number | TQD22200 |
| Series/Type | TQD |
| Amp Rating | 200A |
| Voltage | 240V |
| Poles | 3 Pole |
| Interrupting Rating | 10kAIC |
| Frequency | 50/60 Hz |
| Mounting | Bolt-on / applicable configuration |
| Panel | Compatible panel model |
You may not find every specification printed directly on the breaker. Some information may need to be confirmed using the panel label or manufacturer documentation.
Step 1: Find the Circuit Breaker Manufacturer
Start by identifying the brand or manufacturer.
Common manufacturers include:
- GE
- Eaton
- Siemens
- Square D
- ABB
- Schneider Electric
The manufacturer's logo or name is often printed prominently on the front of the breaker.
Why the Manufacturer Matters
Circuit breakers are designed for specific electrical equipment and breaker families.
A GE breaker, for example, should not automatically be replaced with an Eaton, Siemens, or Square D breaker simply because the amperage is the same.
Manufacturer identification is the first step toward finding the correct replacement.
Step 2: Find the Model or Catalog Number
The model number or catalog number is often the most important information when identifying an existing breaker.
Look carefully for a combination of letters and numbers.
For example:
TQD22200
This type of identification number allows a supplier or manufacturer to distinguish one breaker model from another.
Write Down the Entire Number
Don't record only part of the number.
For example, if the breaker says:
TQD22200
don't search only for:
TQD
or:
200 amp breaker
Use the complete identification whenever possible.
A single letter or number can indicate a different product configuration.
Step 3: Identify the Breaker Series or Type
Some breakers include a series or type designation.
Examples from different manufacturers may include:
- TQD
- QO
- QOB
- THQB
- THQC
- ED
- FD
These designations can identify the product family and help determine compatibility.
The breaker series can affect:
- Panel compatibility
- Mounting method
- Available ratings
- Physical configuration
- Trip characteristics
- Accessories
Important
The breaker series can be just as important as the amp rating when identifying a replacement.
Step 4: Check the Amp Rating
Next, identify the amperage rating.
Common breaker ratings include:
- 15A
- 20A
- 30A
- 50A
- 100A
- 150A
- 200A
- 400A
- 600A
The amp rating is often displayed prominently on the breaker handle or label.
For example:
200A
means the breaker has a 200 amp current rating for its intended application.
Don't Stop Here
Finding a 200 amp breaker does not mean you've found the correct replacement.
You still need to verify the other specifications.
Step 5: Determine the Number of Poles
Check whether the breaker is:
- 1-pole
- 2-pole
- 3-pole
- 4-pole
The number of poles indicates the breaker's circuit configuration.
Single-Pole
Commonly used for many branch circuits.
2-Pole
Commonly used for two-conductor higher-voltage circuits, including many 208V and 240V applications.
3-Pole
Commonly used for three-phase electrical systems.
Example
A breaker marked:
200A – 3 Pole
should not automatically be replaced with:
200A – 2 Pole
The pole configuration must match the electrical application.
Step 6: Check the Voltage Rating
Look for the voltage specification.
You may find ratings such as:
- 120V
- 120/240V
- 208V
- 240V
- 480V
- 600V
The correct replacement breaker must be rated for the electrical system in which it will be installed.
Example
A breaker marked:
240V
has a different voltage rating from a breaker designed for a higher-voltage industrial application.
Always check the manufacturer's specifications rather than assuming similar-looking breakers have the same voltage rating.
Step 7: Find the Interrupting Rating
The interrupting rating is another important specification when identifying a circuit breaker.
It may appear as:
- 5kA
- 10kA
- 14kA
- 22kA
- 25kA
- 35kA
- 65kA
- 100kA
You may also see:
kAIC
What Does 10kA Mean?
10kA means:
10,000 amps
In the context of a circuit breaker, this normally refers to its rated fault-current interrupting capacity under specified conditions, not its normal continuous current.
For example:
200A + 10kAIC
does not mean the breaker carries 10,000 amps continuously.
It means:
- 200A = current rating
- 10kAIC = interrupting rating
Both specifications need to be considered separately.
Step 8: Check for Additional Markings
Circuit breakers can contain other useful information.
Look for markings related to:
Frequency
For example:
50/60 Hz
Temperature
You may see temperature-related information such as:
40°C
Certification
Look for applicable listing or certification marks.
Trip Type
Depending on the breaker, you may find information about:
- Thermal-magnetic protection
- Electronic trip
- Adjustable trip
- Ground-fault protection
Application Information
Some breakers include additional markings related to their intended equipment or application.
Record anything that appears relevant.
Step 9: Check the Electrical Panel Label
The breaker itself isn't the only source of identification information.
Look at the label inside the electrical panel or on the panel door.
The panel label may identify:
- Panel manufacturer
- Panel model
- Approved breaker types
- Voltage
- System information
- Wiring information
- Compatible breaker series
This information is extremely useful because panel compatibility is not determined by physical appearance alone.
Step 10: Determine the Mounting Configuration
Circuit breakers can use different mounting systems.
Common configurations include:
Plug-On
The breaker is designed to connect to the panel bus using a plug-on mechanism.
Bolt-On
The breaker is secured to the electrical bus using a bolted connection.
Commercial and industrial electrical equipment can also use other configurations.
When ordering a replacement, make sure the mounting configuration matches the intended panel and breaker system.
Step 11: Take a Clear Photo of the Breaker Label
If you're sourcing a replacement online, a clear photo can be extremely helpful.
If safe to do so, photograph the breaker label without removing or manipulating the electrical equipment.
Try to capture:
- Manufacturer logo
- Complete model number
- Amp rating
- Voltage
- Pole information
- kAIC
- Series/type
- Other markings
A clear label photo can help a supplier verify the exact product.
Avoid Guessing From a Blurry Image
If a model number isn't readable, don't guess the missing characters.
One incorrect character can lead to a completely different breaker.
Example: Identifying a GE TQD22200
Suppose you're replacing a breaker and the visible markings identify it as:
GE
TQD22200
200A
240V
3 Pole
10kAIC
You can organize the information like this:
| Specification | Identified Information |
|---|---|
| Manufacturer | GE |
| Model | TQD22200 |
| Series | TQD |
| Amperage | 200A |
| Voltage | 240V |
| Poles | 3 |
| Interrupting Rating | 10kAIC |
This gives you much more useful information than searching for a generic 200 amp circuit breaker.
Why the Complete Model Matters
If you're looking for a TQD22200 replacement, searching by the complete model number can help narrow your results to the appropriate product family.
Before purchasing, however, always verify the product specifications and panel compatibility.
What If the Circuit Breaker Label Is Missing?
Sometimes labels become:
- Faded
- Damaged
- Dirty
- Scratched
- Obscured
- Difficult to read
If you cannot identify the breaker from its label, check other sources.
Look at the Panel
Find the panel manufacturer and model number.
Check Existing Documentation
You may have:
- Electrical drawings
- Installation manuals
- Equipment documentation
- Previous invoices
- Maintenance records
Consult the Manufacturer
Manufacturer documentation may help identify older or discontinued breaker families.
Contact an Electrical Professional
For commercial and industrial systems, a qualified electrician or electrical engineer can help identify the equipment safely.
What If the Circuit Breaker Is Discontinued?
Older electrical systems frequently contain discontinued breakers.
A discontinued breaker doesn't necessarily mean that the electrical system must be completely replaced.
Depending on the product, there may be:
- A manufacturer-approved replacement
- A successor model
- An equivalent listed product
- New-old-stock inventory
- Surplus inventory
- Reconditioned equipment
However, compatibility must be confirmed before purchasing.
This is particularly important for older commercial and industrial panels.
How to Identify a Circuit Breaker Online
If you're searching online for a replacement, use a specific search sequence.
Start With the Complete Model Number
For example:
TQD22200
Then add relevant specifications if needed:
GE TQD22200 200A 3 Pole
This is much more effective than searching:
200 amp breaker
Why?
A generic search can return hundreds of breakers with different:
- Brands
- Series
- Poles
- Voltages
- Interrupting ratings
- Mounting systems
Using the complete part number dramatically narrows the search.
What Information Should You Send a Supplier?
If you're unsure which replacement to order, provide the supplier with as much information as possible.
A useful request might include:
Manufacturer: GE
Model: TQD22200
Amp Rating: 200A
Voltage: 240V
Poles: 3
Interrupting Rating: 10kAIC
Panel Model: [panel model]
You can also include a clear photo of the breaker label and panel identification label where safe and appropriate.
This gives the supplier enough information to help determine the correct product.
Common Mistakes When Identifying a Circuit Breaker
Mistake 1: Searching Only by Amperage
Searching for "200 amp breaker" is too broad.
Always include the manufacturer and model number whenever possible.
Mistake 2: Ignoring Letters in the Model Number
Letters can identify the breaker series or configuration.
Don't leave them out.
Mistake 3: Confusing 2-Pole and 3-Pole
The number of poles is a critical specification.
Mistake 4: Confusing kAIC With Amp Rating
A breaker marked 200A and 10kAIC has two different ratings.
Mistake 5: Assuming Physical Fit Means Compatibility
A breaker can appear to fit while still being unsuitable or unapproved for the panel.
Mistake 6: Choosing a Higher Amp Breaker
Never increase the breaker rating simply because a higher-rated product is available.
The circuit, conductors, equipment, and system design must support the selected protection.
Circuit Breaker Identification Checklist
Before ordering your replacement, make sure you've recorded:
✓ Manufacturer
✓ Complete model/catalog number
✓ Breaker series/type
✓ Amp rating
✓ Voltage rating
✓ Number of poles
✓ Interrupting rating
✓ Mounting configuration
✓ Panel manufacturer
✓ Panel model
✓ Product condition required
If you have all of this information, identifying a suitable replacement becomes significantly easier.
Frequently Asked Questions
How do I identify my circuit breaker?
Start by locating the manufacturer's name and complete model or catalog number. Then record the amp rating, voltage, number of poles, interrupting rating, breaker series, and other markings.
Where is the model number on a circuit breaker?
The model or catalog number is often printed on the front or side of the breaker. Depending on the product, it may also be located on the side, label, or associated documentation.
Can I identify a breaker by its appearance?
Appearance can provide clues, but it is not enough to establish compatibility. Always use the model number and manufacturer information whenever possible.
What if I only know the breaker is 200 amps?
You need more information before ordering a replacement. Identify the manufacturer, model/series, poles, voltage, interrupting rating, and panel compatibility.
How do I identify an old circuit breaker?
Look for the manufacturer's name, model number, series, and electrical ratings. If the markings are unreadable, check panel documentation or have a qualified professional identify it.
Are circuit breakers with the same amp rating interchangeable?
No. Breakers with the same amp rating can have different voltage ratings, pole configurations, mounting systems, interrupting ratings, and panel compatibility.
Can I replace a discontinued circuit breaker with a newer model?
Possibly, but only after confirming that the newer model is an approved and compatible replacement for the specific electrical equipment.
What does TQD22200 mean?
TQD22200 is a model/catalog identification associated with a GE TQD-series circuit breaker. When sourcing a replacement, verify the complete product specifications rather than relying on the model number alone.
Final Thoughts
Knowing how to identify a circuit breaker before ordering a replacement can save time and help prevent costly purchasing mistakes.
The most important information to collect is:
- Manufacturer
- Complete model/catalog number
- Breaker series
- Amp rating
- Voltage rating
- Number of poles
- Interrupting rating
- Mounting configuration
- Panel manufacturer and model
Don't choose a replacement based only on the amp rating or physical appearance.
For commercial and industrial breakers, the exact model and compatibility information can be especially important.
If you're replacing a breaker such as the GE TQD22200, use the complete model number as your starting point, then verify the voltage, poles, interrupting rating, mounting configuration, and panel compatibility before purchasing.
Identify first. Compare specifications second. Order the replacement last.