What a Bussmann cross reference does and why you need one
A Bussmann cross reference is a lookup tool that matches a fuse or fuse holder part number to its equivalent in the Bussmann product line. When you have an old, discontinued, or unfamiliar part number from another manufacturer, a cross reference tells you which Bussmann product does the same job. This matters because Bussmann makes fuses and holders for everything from vehicles to industrial equipment, and their part numbers don't always match what came in your device originally.
You need a cross reference when you're replacing a fuse that's blown or worn, but the original part is no longer made, or when you're sourcing parts for equipment and want to standardize on Bussmann products. Instead of guessing or buying the wrong size, a cross reference gives you the exact Bussmann equivalent so you can order with confidence.
Bussmann publishes cross references in several formats: printed catalogs, PDF documents on their website, and interactive tools through distributors. The format you use depends on what information you're starting with and how quickly you need the answer.
Key Takeaways
- A Bussmann cross reference matches a part number from any manufacturer to the correct Bussmann fuse or holder that performs the same function.
- You can search by the original part number, by amperage and voltage ratings, or by the device type (automotive, industrial, panel-mount) to find your match.
- Bussmann's website offers free PDF cross-reference documents organized by product category, and many distributors provide searchable online tools.
- If you cannot find a direct match, contact a Bussmann distributor or the company directly with your original part specifications, and they can recommend the closest equivalent.
Where to find Bussmann cross-reference documents
Bussmann publishes cross-reference guides as downloadable PDFs on their official website, organized by product type. You can find separate documents for automotive fuses, industrial fuses, panel-mount holders, and specialty products. Visit bussmann.com and look for the "Technical Resources" or "Cross Reference" section — the exact location shifts, but the search function will point you there quickly.
Many electrical distributors that stock Bussmann products also host cross-reference tools on their own websites. Suppliers like Heilind, Sensormatic, and local electrical wholesalers often have searchable databases where you enter a part number and get Bussmann matches when ready. If you already buy from a distributor, start there — their tool may be faster than hunting through Bussmann's site.
If you cannot locate a PDF or online tool, call a Bussmann distributor directly. They have access to the full cross-reference database and can look up a part number over the phone in minutes. This is especially useful if the part number is worn, partial, or from an obscure manufacturer.
How to search a cross reference by part number
Start with the part number printed on the fuse or holder you're replacing. Look for it on the body of the fuse itself, on the packaging, or in the device's manual. The number may be stamped, printed, or molded into the plastic or ceramic.
Once you have the part number, open the Bussmann cross-reference PDF or online tool and search for that number in the "Original Part Number" or "Equivalent" column. Most PDFs are organized by manufacturer, so if you know the brand (Littelfuse, Eaton, Schott, etc.), navigate to that section first. Online tools usually have a search box where you type the number and get results when ready.
The cross reference will show you the Bussmann part number, the amperage rating, the voltage rating, and sometimes the physical size or form factor. Write down the Bussmann part number exactly as shown — fuse part numbers are precise, and a single digit wrong will get you the wrong product.
How to search a cross reference by electrical ratings
If you don't have a part number but you know the fuse's amperage and voltage, you can search by those specs instead. For example, if you need a 15-amp, 250-volt fuse, you can look up "15A 250V" in the cross reference and see all Bussmann fuses that match those ratings.
This method works best when you're replacing a fuse in a device where the original part is long gone or illegible. Check the device's manual or the fuse holder itself for the amperage and voltage markings — they're usually printed right on the holder or listed in the schematic.
Keep in mind that amperage and voltage alone don't always narrow it down to one fuse. You may also need to know the physical size (cartridge, blade, bolt-down) or the breaking capacity (how much current it can safely interrupt). The cross reference will list these details, so compare all of them to the original fuse before ordering.
Understanding the information in a cross-reference result
A typical cross-reference result shows the original manufacturer's part number, the Bussmann equivalent part number, amperage, voltage, and sometimes the fuse type or form factor. Some cross references also list the breaking capacity (measured in amps or kiloamps), which matters for safety in high-current applications.
Pay attention to the fuse type: a ceramic cartridge fuse is not the same as a blade fuse, and a bolt-down fuse holder is not the same as a panel-mount holder. The cross reference will specify which type the Bussmann product is, so make sure it matches the holder in your device. If the form factor is different, the fuse won't fit, and you may need a different Bussmann product or an adapter.
If the cross reference shows multiple Bussmann products for the same original part, the differences are usually in breaking capacity or special features (like time-delay or fast-acting). For most replacements, any of them will work, but if the device is sensitive to fuse speed (like a motor circuit), match the original fuse's speed class as well.
What to do if you cannot find a direct match
If your part number doesn't appear in the cross reference, the original fuse may be discontinued, from a very small manufacturer, or a custom part. Start by checking the amperage and voltage again — sometimes a typo in the part number prevents a match, but the electrical ratings will still find similar products.
Contact a Bussmann distributor or Bussmann's customer service directly with the original part number and the device it came from. Provide as much information as you can: the manufacturer of the original fuse, the amperage, voltage, physical size, and what the device does. A Bussmann technician can often find a suitable equivalent even if it's not in the standard cross reference.
If Bussmann cannot match it, ask the distributor whether a different manufacturer's product is a better fit. Sometimes a fuse from Littelfuse or Eaton is the only equivalent, and that's the right answer. The cross reference is a guide, not a may provide that Bussmann makes every fuse ever made.
Using a cross reference for fuse holders and accessories
Bussmann cross references cover not just fuses but also fuse holders, clips, blocks, and panel-mount assemblies. If you're replacing a fuse holder or upgrading to a different style, the same cross-reference process applies: find the original part number, search the cross reference, and note the Bussmann equivalent.
Fuse holder cross references are especially useful when you're retrofitting equipment or standardizing a fleet. For example, if you have vehicles with different fuse holder styles, a cross reference can show you which Bussmann holder is compatible with each one, so you can stock a single Bussmann product that works across multiple vehicles.
When ordering a holder, double-check the amperage rating and the fuse type it accepts. A holder rated for 30 amps will not safely hold a 60-amp fuse, even if the fuse physically fits. The cross reference will list the holder's rating, so verify it matches your needs.
Frequently Asked Questions
Can I use a Bussmann fuse in a device that originally had a different brand?
Yes, as long as the amperage, voltage, and physical size match exactly. Fuses are standardized parts, so a 15-amp, 250-volt Bussmann fuse will work in any device designed for a 15-amp, 250-volt fuse, regardless of the original brand. The cross reference confirms that the specs are identical.
What if the cross reference shows multiple Bussmann part numbers for one original fuse?
The differences are usually in breaking capacity or speed class (fast-acting versus time-delay). For most general-purpose replacements, any of them will work. If the device manual specifies a particular speed class, match that. Otherwise, the standard version is usually the safest choice.
Are Bussmann cross references updated regularly?
Bussmann updates their cross references periodically as products are discontinued and new ones are introduced. The PDFs on their website are current, but printed catalogs may be outdated. Always use the online version or contact a distributor to confirm a match before ordering.
Can I search a cross reference by device type instead of part number?
Some cross references are organized by device type (automotive, industrial, marine), which can help if you know the process but not the part number. However, you'll still need the amperage and voltage to narrow it down. Device type alone is not specific enough to identify a single fuse.
What should I do if a Bussmann cross reference shows a product that is out of stock?
Contact the distributor or Bussmann directly to ask about availability and lead time. If the part is discontinued, ask whether a newer Bussmann product is a suitable replacement, or whether the distributor can recommend an equivalent from another manufacturer. Do not substitute a fuse with different amperage or voltage just because it's in stock.