Bussmann BMM603 Two-Pole Fuse Block, 600V 30A, 200kA SCCR
The Bussmann BMM603 is a two-pole fuse block engineered for reliable overcurrent protection in demanding commercial and industrial electrical systems. Rated 600V and 30A with an exceptional 200kA short circuit current rating, this fuse block is available in Pressure Plate/Quick Connect (PQ) and S terminal styles to match your installation and wiring requirements. Both styles share the same voltage, amperage, and fault-current performance, giving specifiers flexibility in terminal configuration without sacrificing protection. The RoHS compliant construction supports responsible manufacturing standards while delivering dependable performance for panelboards, switchgear, and power distribution equipment.
Key Features
- Voltage Rating: 600V rating supports high-voltage commercial and industrial installations with reliable performance and safety compliance.
- Amperage Rating: 30A capacity provides adequate current handling for medium-duty circuits while maintaining proper overcurrent protection.
- Two-Pole Configuration: Simultaneous protection of both line conductors supports balanced load management and enhanced circuit safety.
- Terminal Style Options: Offered in Pressure Plate/Quick Connect (PQ) and S terminal styles for secure, maintenance-friendly connections suited to different installation needs.
- 200kA Short Circuit Rating: Delivers exceptional fault current interruption capability for robust protection in high-demand electrical systems.
- RoHS Compliant: Meets environmental standards for responsible electrical component manufacturing and installation.
Certifications & Compliance
- RoHS Compliant
Technical Specifications
- Refer to manufacturer documentation for complete technical specifications.
Typical Applications
- Commercial Electrical Panels
- Industrial Control Systems
- Motor Control Centers
- Distribution Equipment
- Electrical Switchgear
- Power Distribution Units
- Manufacturing Facilities
Why Bussmann?
Bussmann fuse blocks deliver proven reliability with RoHS compliant construction and a robust 200kA short circuit rating for demanding electrical protection needs. Whether specified with Pressure Plate/Quick Connect or S terminal styles, the BMM603 two-pole fuse block ensures secure, code-compliant connections for professional commercial and industrial installations. This combination of high voltage and amperage capacity with strong fault current protection makes it a dependable choice for critical power distribution applications in panelboards, motor control centers, and switchgear where consistent overcurrent protection is essential. Electrical professionals can specify the terminal style that best fits their wiring method while relying on the same proven 600V, 30A, 200kA-rated protection platform.
Manufacturer Resources
Product Specs
- Department:
- Electrical
- Number Of Poles:
- Two-pole
- Compliances:
- RoHS Compliant
- Product Type:
- Fuse Block
- Voltage Rating:
- 600V
- Amperage Rating:
- 30A
- Configuration:
- Two-Pole
- Standards:
- RoHS Compliant
- Product Group:
- Circuit Protection
- Product Subgroup:
- Fuse Holders & Blocks
Bussmann BMM603-2PQ – Frequently Asked Questions
1) What is the difference between the Bussmann BMM603-2PQ and BMM603-2S fuse blocks?
The difference is terminal style only. The BMM603-2PQ uses the Pressure Plate/Quick Connect terminal and the BMM603-2S uses the S terminal. Both are two-pole blocks rated 600V, 30A with a 200kA short circuit current rating, so pick the one that matches your wiring method rather than your electrical requirement.
2) Can the Bussmann BMM603 be used on a 480V three-phase motor circuit?
On voltage, yes, it is rated to 600V, so 480V is within rating. But the BMM603 is a two-pole block. A three-phase circuit needs three poles, so you would either use two blocks or specify a three-pole block instead. Amperage is capped at 30A per pole.
3) I need a fuse block that mounts on DIN rail instead of being panel mounted - what should I use?
The Littelfuse LFG60015-1SQDINR is a DIN rail mount block, rated 600V and 15A for Class G fuses in a single-pole body. Choose it when the enclosure is built around DIN rail and 15A is enough for the circuit. The Bussmann BMM603 is a two-pole block rated 600V 30A and is specified by terminal style, PQ or S, rather than by rail mounting.
4) What is the closest equivalent to the Bussmann BMM603 fuse block from another manufacturer?
The Littelfuse LFR60030-3CID is the nearest match on electrical ratings. It is a Class R fuse block rated 600V and 30A, the same voltage and amperage the BMM603 carries. The difference is pole count: the LFR60030-3CID is a three-pole block, while the BMM603 is a two-pole block, so on a two-wire circuit you would either carry an unused pole or stay with the BMM603.
5) For a three-phase feeder, should I use two Bussmann BMM603 blocks or a different part?
For three-phase work a single three-pole block keeps all three legs on one body and one mounting footprint. The Littelfuse LFR60030-3CID is a three-pole Class R block rated 600V 30A, matching the same voltage and amperage as the Bussmann BMM603. The BMM603 is a two-pole block, so it suits single-phase two-wire protection; pairing two of them for three-phase leaves a spare pole and doubles the mounting work.
6) Does a 200kA short circuit current rating matter for a fuse block in an industrial panel?
It does when you are documenting the assembly SCCR. The BMM603's 200kA short circuit current rating means the block itself will not be the limiting component in most industrial panel calculations, which is why it gets specified into motor control centers, switchgear, and power distribution equipment.
7) Do I need a bolt-in fuse block rather than the Bussmann BMM603?
If your enclosure is prepped for bolt-in mounting, look at the Littelfuse LD Series POWR-BLOKS, which is a bolt-in mounting fuse block. Mounting method is the first thing to settle, because a block that does not land on your existing pattern means drilling a panel that is already populated.
8) Will the Bussmann BMM603 protect both line conductors on a single-phase 240V circuit?
Yes. The two-pole configuration carries a fuse in each line conductor, which is what you want on an ungrounded or corner-grounded single-phase circuit. It is rated to 600V, so 240V single-phase is well inside the rating, with 30A the ceiling per pole.
9) Is the Littelfuse POWR-BLOKS LD Series a drop-in replacement for the Bussmann BMM603?
No. The Littelfuse LD Series POWR-BLOKS block uses bolt-in mounting, so it needs tapped or through-drilled mounting provisions in the panel. The Bussmann BMM603 is ordered by terminal style, PQ pressure plate/quick connect or S, and those wiring terminations are not interchangeable with a bolt-in LD block. Treat them as separate specifications rather than swapping one for the other in an existing footprint.
10) Does the Bussmann BMM603 take the same fuses as the Littelfuse Class R and Class G blocks?
No - fuse class governs which fuse body fits the clips. The Littelfuse LFR60030-3CID is built for Class R fuses and the Littelfuse LFG60015-1SQDINR is built for Class G fuses, and a Class G fuse will not seat in a Class R block. Confirm the fuse class called out on the drawing before ordering either of those alongside the Bussmann BMM603, which is a 600V 30A two-pole block.
11) Is the Bussmann BMM603 fuse block RoHS compliant for a government or institutional spec?
RoHS compliant, yes, and that is the compliance the BMM603 carries on record. If your submittal also calls for other agency listings, verify those against the manufacturer's documentation before you submit.
12) Which of these fuse blocks is RoHS compliant?
The Bussmann BMM603 two-pole fuse block is RoHS compliant in both the PQ and S terminal styles, which is the compliance item to cite if a facility or government purchase order requires it. If your specification is written around RoHS documentation, the BMM603 is the block to quote for a 600V 30A two-pole position.
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Absolutely. The Bussmann BMM603-2PQ is backed by a manufacturer’s warranty.
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