High-Current Surface Mount Brick Fuses
Cost-effective, UL-compliant surface-mount fuses with stable supply, multiple ratings, and support for volume production.
Cost-effective, UL-compliant surface-mount fuses with stable supply, multiple ratings, and support for volume production.
PROSEMI fast-acting and time-delay high current SMD brick fuses are available in 2410, 1240, 1032, and 1245 packages, with rated currents ranging from 0.1A to 100A, providing reliable overcurrent protection for a wide range of electronic designs.
These brick fuses can replace certain through-hole fuse solutions while supporting rated voltages up to 600V and current ratings up to 100A, making them suitable for high-power and high-reliability applications.
With short lead times of as little as 4–8 weeks, commonly used current ratings such as 10A, 15A, 20A, 25A, 30A, 40A, 50A, 60A, 80A, and 100A are readily available to support urgent production requirements.
Please download the datasheet below for detailed electrical specifications, dimensions, and application guidelines. Our engineering team is available to support part selection, cross-reference analysis, and design optimization, and can also assist with samples, technical consultation, and quotation requests.
Brick Fuses are high-current, surface-mount fuses designed to provide reliable overcurrent protection in power-intensive electronic systems. Their robust rectangular structure—similar to a “brick” shape—offers superior thermal stability, mechanical strength, and efficient heat dissipation, making them ideal for demanding environments.
| Part number | Interrupting Rating | Voltage Rating(V) | Ampere Rating(A) | Typical Cold Resistance(mΩ) | Typical Melting I²t(A²Sec) | Dimensions | Automotive | Datasheets |
|---|---|---|---|---|---|---|---|---|
| 2410BP-30A | 500A@72VDC | 72VDC | 30 | 0.0012 | 900 | 6.2×2.6×2.6 | No | |
| 2410BP-40A | 500A@63VDC | 63VDC | 40 | 0.0009 | 1600 | 6.2×2.6×2.6 | No | |
| 2410BP-30-E | 500A@72VDC | 72VDC | 30 | 0.0011 | 1000 | 6.5x2.6x2.6 | No | |
| 1245FA-5A-S | 100A@600Vdc 100A@350Vac 1500A@300Vac | 600VDC | 5 | 18 | 14.25 | 12×4.5 | No | |
| 1245FA-4A-S | 100A@600Vdc 100A@350Vac 1500A@300Vac | 600VDC | 4 | 23 | 9.12 | 12×4.5 | No | |
| 1245FA-3.15A-S | 100A@600Vdc 100A@350Vac 1500A@300Vac | 600VDC | 3.15 | 33 | 4.58 | 12×4.5 | No | |
| 1245FA-2.5A-S | 100A@600Vdc 100A@350Vac 1500A@300Vac | 600VDC | 2.5 | 40 | 2.93 | 12×4.5 | No | |
| 1245FA-2A-S | 100A@600Vdc 100A@350Vac 1500A@300Vac | 600VDC | 2 | 87 | 2.64 | 12×4.5 | No | |
| 1245FA-1.6A-S | 100A@600Vdc 100A@350Vac 1500A@300Vac | 600VDC | 1.6 | 115 | 1.58 | 12×4.5 | No | |
| 1245FA-1.25A-S | 100A@600Vdc 100A@350Vac 1500A@300Vac | 600VDC | 1.25 | 135 | 1.17 | 12×4.5 | No | |
| 1245FA-1A-S | 100A@600Vdc 100A@350Vac 1500A@300Vac | 600VDC | 1 | 168 | 0.72 | 12×4.5 | No | |
| 1245FA-R800-S | 100A@600Vdc 100A@350Vac 1500A@300Vac | 600VDC | 0.80 | 230 | 0.41 | 12×4.5 | No | |
| 1245FA-R630-S | 100A@600Vdc 100A@350Vac 1500A@300Vac | 600VDC | 0.63 | 390 | 0.14 | 12x4.5 | No | |
| 1245FA-R500-S | 100A@600Vdc 100A@350Vac 1500A@300Vac | 600VDC | 0.5 | 530 | 0.08 | 12×4.5 | No | |
| 1032FH-40A | 800A@63Vdc | 63VDC | 40 | 0.0012 | 1400 | 10x3.15x3.15 | No | |
| 1032FH-50A | 800A@63Vdc | 63VDC | 50 | 0.00097 | 2200 | 10x3.15x3.15 | No | |
| 1032FH-60A | 800A@63Vdc | 63VDC | 60 | 0.00085 | 4000 | 10x3.15x3.15 | No | |
| 1240FH-20A | 150A@250Vac 150A@125Vac 800A@80Vdc 300A@100Vdc | 250VAC | 20 | 2.9 | 20 | 10×3.15×3.15 | No | |
| 1240FH-25A | 150A@250Vac 150A@125Vac 800A@80Vdc 300A@100Vdc | 250VAC | 25 | 2.25 | 35 | 10×3.15×3.15 | No | |
| 1240FH-30A | 300A@100Vdc | 100VDC | 30 | 1.5 | 90 | 10×3.15×3.15 | No | |
| 1240FH-30AH | 800A@80Vdc | 80VDC | 30 | 0.00135 | 180 | 10×3.15×3.15 | No | |
| 1240FH-40A | 500A@125Vac 1000A@72Vdc | 125VAC | 40 | 1.1 | 280 | 12.3×4.5×4.5 | No | |
| 1240FH-50A | 500A@125Vac 1000A@72Vdc | 125VAC | 50 | 0.95 | 480 | 12.3×4.5×4.5 | No | |
| 1240FH-60A | 500A@125Vac 1000A@72Vdc | 125VAC | 60 | 0.6 | 900 | 12.3×4.5×4.5 | No |
A: When selecting a SMD brick fuse, both the rated voltage and rated current must be carefully considered to ensure safe and reliable operation.
(1) Selecting the Rated Voltage The rated voltage of a fuse is the maximum voltage at which it can safely interrupt a circuit.
①The fuse’s rated voltage must be equal to or higher than the circuit’s operating voltage.
②A fuse with a lower voltage rating than the circuit voltage must never be used.
Example:
①A 3A / 125V fuse cannot be used in a 250V circuit.
②A 3A / 250V fuse can be safely used in both 125V and 250V circuits.
(2)Selecting the Rated Current
The rated current of a fuse should be selected based on the circuit’s normal operating current and operating conditions.
Key factors to consider include: Normal operating current (Irm), Ambient temperature and derating factors, Inrush or surge current (I²t value), Expected number of current surges during product lifetime
A commonly used calculation method is:
In ≥ Irm / (Sc × Tc), Where: In = Rated current of the fuse
Irm = Maximum normal operating current of the circuit
Sc = Safety derating factor
0.75 (UL standard)
0.9 (IEC standard)
0.85 (JIS standard)
Tc = Temperature derating factor (refer to the fuse’s temperature derating curve)
The selected fuse rating should always be equal to or higher than the calculated value to ensure reliable operation and avoid nuisance blowing.
Summary:
①Choose a rated voltage ≥ circuit voltage
②Calculate rated current based on operating current, temperature, and safety factors
③Consider inrush current and application conditions
④Select the nearest higher standard fuse rating for reliable performance
A: Yes. Samples and technical support are available upon request. Our engineering team can assist with product selection, application evaluation, and technical documentation to support your design and development needs.
A: A surface mount brick fuses is a single-use overcurrent protection device designed to protect electronic circuits from damage caused by excessive current. When an abnormal overcurrent occurs, the fuse element rapidly heats up and melts, permanently opening the circuit and preventing further damage to sensitive components.
surface mount brick fuses operate by converting excessive electrical current into heat. Once the current exceeds the rated limit, the internal fuse element melts and breaks the circuit. Because this process is irreversible, the fuse must be replaced after it operates.
A: Fast-acting surface mount brick fuse respond very quickly to overcurrent conditions. They are designed to open the circuit almost immediately when a fault occurs, making them ideal for protecting sensitive electronic components such as ICs, semiconductors, and precision circuits where even short-duration overcurrent can cause damage.
Time-delay (slow-blow) surface mount brick fuse, on the other hand, are designed to withstand temporary inrush currents without opening. They are commonly used on the input side of power supplies or circuits where a brief surge occurs during startup. This inrush current is normal and not considered a fault, so a time-delay fuse allows the system to start safely without nuisance tripping.
In summary:
Fast-acting fuses protect sensitive components by reacting immediately to abnormal current.
Time-delay fuses tolerate short-term surge currents and are better suited for power input and high-inrush applications.
A: Our surface-mount Brick Fuses are available in multiple industry-standard package sizes to support a wide range of circuit designs and power requirements.
Available package sizes include: 2410, 1240, 1032, and 1245
Voltage ratings include: 63 VDC, 72 VDC, 80 VDC, 85 VDC, 125 VAC / DC, 250 VAC, 350 VAC, Up to 600 VDC
These options allow engineers to select the appropriate fuse based on system voltage, space constraints, and application requirements, ensuring safe and reliable overcurrent protection across a wide range of electronic designs.
A: Yes. Our surface mount brick fuses comply with major international safety and environmental standards. They are UL certified and manufactured using halogen-free and lead-free materials, meeting RoHS compliance requirements.
These certifications ensure that our surface mount Brick Fuses meet recognized safety, reliability, and environmental standards, making them suitable for use in a wide range of global electronic and industrial applications.
Prosemi Technology, as a leading company in the field of precision current sensing components, is dedicated to providing customers with high-performance and high-reliability solutions. Our precision alloy current-sensing resistors, including SMD chip resistors and shunt resistors, are designed for a variety of applications, helping your products achieve accurate current detection and efficient energy management.
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