Mersen FEB-11-11-BA Midget Fuse Block, 30A 1-Pole 600V
The Mersen FEB-11-11-BA is a Midget-style fuse block rated 600VAC and 600VDC, built for 1-pole circuits up to 30A. This crimp-style (11-11-BA) block uses a polyethylene insulating body and a clip-in fuse installation method, making it a compact, reliable choice for protecting AC/DC circuits in panels and control equipment where space and dielectric integrity both matter.
Key Features
- Compact Footprint: Measures approximately 5.8 in long x 1 in wide x 1 in high and weighs just 0.2 lb, suited to tight panel layouts.
- Durable Construction: Polyethylene insulating body provides dielectric strength and long-term insulation performance.
- Clip-In Fuse Installation: Simplifies fuse insertion and replacement for Midget-class fuses.
- Crimp Termination (11-11-BA): Crimp-style wire connection for a secure, vibration-resistant termination.
- Dual AC/DC Rating: Rated 600VAC and 600VDC at 50/60 Hz, giving flexibility across AC and DC applications.
- Ampere Rating: 30A ampere rating with a 30A max fuse rating for 1-pole circuit protection.
- In-Line Mounting: 1-pole, in-line configuration for straightforward integration into existing wiring runs.
- High Short-Circuit Rating: 100 kA SCCR supports robust protection in demanding electrical systems.
Certifications & Compliance
- RoHS Compliant
Technical Specifications
- Ac Or Dc: AC/DC
- Ampere Rating: 30 A
- Body Insulating Material: Polyethylene
- Frequency Hz: 50/60 Hz
- Fuse Installation Method: Clip-in
- Installation Mounting: In-Line
- Max Fuse Rating: 30 A
- Product Height: 1 in
- Product Length: 5.8 in
- Product Weight: 0.2 lb
- Product Width: 1 in
- Rated Voltage Ac Ul: 600 V
- Rated Voltage Dc Ul: 600 V
- Rohs Compliant: Yes
- Short Circuit Current Rating Sccr: 100 kA
Typical Applications
- Industrial Control Panels
- Motor Control Centers and OEM Equipment
- Power Distribution Panels
- AC and DC Circuit Protection Systems
- Panel Retrofits and New Panel Builds
Why Mersen?
Mersen engineers the FEB-11-11-BA with a polyethylene insulating body, a secure clip-in fuse interface, and a 100 kA SCCR rating to deliver dependable, code-compliant circuit protection. The dual 600VAC/600VDC rating and RoHS-compliant construction make this Midget fuse block a practical, versatile choice for professional electrical installations that demand consistent performance.
Manufacturer Resources
Product Specs
- Ac Or Dc:
- AC/DC
- Rated Voltage Ac Ul:
- 600 V
- Number Of Poles:
- 1-Pole
- Fuse Installation Method:
- Clip-in
- Product Height:
- 1 in
- Fuse Type Class:
- Midget
- Short Circuit Current Rating Sccr:
- 100 kA
- Product Width:
- 1 in
- Department:
- Electrical
- Ampere Rating:
- 30 A
- Rohs Compliant:
- Yes
- Max Fuse Rating:
- 30 A
- Product Group:
- Wiring Devices
- Body Insulating Material:
- Polyethylene
- Frequency Hz:
- 50/60 Hz
- Rated Voltage Dc Ul:
- 600 V
- Fuse Class:
- Midget
- Installation Mounting:
- In-Line
- Product Type:
- Fuse Block
Mersen Feb-11-11 – Frequently Asked Questions
1) What size fuse does the Mersen FEB-11-11 fuse block take?
It takes Midget class fuses only, up to 30A. The clip-in fuse interface is sized for the Midget body, so a Class CC, Class G, or Class R fuse will not seat in it. Voltage rating on the block is 600V AC and 600V DC, so the fuse you pair with it should be rated for the circuit voltage you are actually running.
2) Can I use the Mersen FEB-11-11 on a DC circuit, like a battery or solar string?
Yes on DC. The block carries a 600V DC rating alongside its 600V AC rating, with AC use at 50/60 Hz. That dual rating is what lets it cover DC control power, battery circuits, and DC-side protection in the same panel where you are also fusing AC. Just keep the DC circuit at or below 600V and use a Midget fuse rated for DC at that voltage.
3) Will this Mersen Midget fuse block meet a 100kA SCCR panel rating?
The FEB-11-11 is rated 100 kA SCCR, so it will not be the component that drops your panel's short circuit current rating below 100kA. Whether the assembly actually holds 100kA still depends on the fuse installed and the rest of the components in the current path, but the block itself is not the limiting element up to that level.
4) What is the difference between the FEB-11-11-BA and the standard FEB-11-11?
Terminal style. The -BA is the box lug version, and the plain FEB-11-11 is the standard terminal. Electrically they are the same block: 1-pole, 30A, 600V AC/DC, Midget clip-in. Pick the BA if you want a box lug landing for your conductor; pick the standard if that is what your panel drawing calls out.
5) I need to fuse a three-phase circuit. Is one of these enough?
No. The FEB-11-11 is a 1-pole block, so it protects one conductor. For three-phase you need three poles, which means three of these or a multi-pole block. If you would rather have the poles ganged in one part, the Littelfuse LFR60030-3CID is a three-pole 600V 30A block, though it takes Class R fuses rather than Midget.
6) I need a 600V 30A fuse block but my panel has DIN rail, not in-line wiring. What should I use instead of the Mersen FEB-11-11?
The Mersen FEB-11-11 is an in-line mounted Midget-class block, so it is wired into the run rather than clipped onto rail. If the panel is built around DIN rail, the Littelfuse LFG60015-1SQDINR is a Class G fuse block rated 600V 15A with DIN rail mounting. Note the change in fuse class and ampere rating: Class G at 15A instead of Midget at 30A, so the fuse itself and the available amperage both change with the switch.
7) Can I use the Mersen FEB-11-11 on a 1000 Vdc solar string, or do I need a different block?
No. The Mersen FEB-11-11 is rated 600VDC on the UL listing, which puts a 1000 Vdc PV string above it. For that duty the Bussmann CHPV2 series is a photovoltaic fuse block rated 1000 Vdc in a modular two-pole arrangement. The Mersen block remains the right part for AC/DC control and distribution circuits at or below 600V, where its dual 600VAC/600VDC rating applies.
8) What is the closest alternative to the Mersen FEB-11-11 if my drawing calls for Class R fuses at 600V 30A?
The Mersen FEB-11-11 holds a Midget-class fuse at 600VAC/600VDC and 30A, so it will not accept a Class R fuse. For a Class R opening at the same voltage and amperage, the Littelfuse LFR60030-3CID is a Class R fuse block rated 600V 30A. The Littelfuse unit is a three-pole part, while the Mersen block is 1-pole, so one Mersen block protects one leg and the LFR60030-3CID covers a three-phase set in a single body.
9) How much panel space does the Mersen FEB-11-11 need?
Plan for roughly 5.8 in of length and a 1 in by 1 in cross section, at about 0.2 lb. The length is the dimension that catches people out, since it runs along the wire rather than across the panel. Leave working room at each end for the conductors and enough clearance above the clips to pull and replace the Midget fuse without removing the block.
10) Is this block suitable for a motor control center or does it need a bolt-in style?
The FEB-11-11 works in control panels and motor control centers as an in-line, clip-in Midget block at 30A and 600V. Where a spec calls for a bolted fuse connection instead of clips, typically on heavier feeder work, that is a different style of block, such as the Littelfuse LD Series POWR-BLOKS with bolt-in mounting.
11) My spec calls for bolt-in fuse mounting. Does the Mersen FEB-11-11 meet that, or is there another block?
The Mersen FEB-11-11 uses a clip-in fuse installation method, which means the Midget fuse is pushed into spring clips rather than bolted down. If the specification requires bolt-in mounting, the Littelfuse POWR-BLOKS LD series is a fuse block built for bolt-in mounting. Clip-in makes fuse changes faster in service; bolt-in is what some panel specifications call out for high-vibration or high-current terminations.
12) For a compact single-circuit branch in a tight control panel, which fuse block takes the least room, the Mersen FEB-11-11 or the Littelfuse LFR60030-3CID?
The Mersen FEB-11-11 is a 1-pole block measuring about 1 in wide by 1 in high, sized for a single circuit in a narrow panel lane. The Littelfuse LFR60030-3CID is a three-pole Class R block at 600V 30A, so it occupies the footprint of three circuits in one body. If you are protecting one leg only, the Mersen 1-pole is the narrower option; if you are feeding a three-phase motor branch, one LFR60030-3CID replaces three separate single-pole blocks.
13) Which fuse block should I standardize on for DC circuits in a control panel?
The Mersen FEB-11-11 carries both a 600V AC and a 600V DC UL rating on the same part, so one block covers AC control circuits and DC circuits in the same panel build, with a 100 kA short circuit current rating. Among the alternatives, the Bussmann CHPV2 series is the DC-specific choice, built as a photovoltaic block at 1000 Vdc in a modular two-pole form, which suits solar string work rather than general panel standardization.
14) Is the Mersen FEB-11-11 fuse block RoHS compliant?
Yes, it is RoHS compliant, which matters for OEM panel builders shipping equipment into markets that require the declaration. The insulating body is polyethylene.
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