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Product Info
- Manufacturer:Mersen
- Sub-Category:Low Voltage Fuse
Description
A4J80
Mersen A4J80 — 80A 600V Class J Fast-Acting Current-Limiting Fuse
The Mersen A4J80 is an 80-ampere, 600VAC / 300VDC Class J fast-acting current-limiting fuse from the Amp-Trap® A4J series. Engineered for demanding industrial and commercial power distribution environments, this fuse provides reliable overcurrent and short-circuit protection with a 200kA AC / 100kA DC interrupting rating — one of the highest available in its class.
As a rejection-type Class J fuse, the A4J80's unique blade terminal dimensions physically prevent substitution with fuses of lower voltage ratings, lower interrupt ratings, or reduced current-limiting capability — a critical safety feature in critical infrastructure applications.
Key Specifications
| Manufacturer | Mersen (formerly Ferraz Shawmut) |
|---|---|
| Part Number | A4J80 |
| Series | Amp-Trap® A4J |
| Ampere Rating | 80A |
| Voltage Rating | 600VAC / 300VDC |
| Interrupt Rating | 200kA AC / 100kA DC |
| Fuse Class | Class J (Rejection-Type) |
| Speed | Fast-Acting |
| Terminal Type | Blade (Clip Mount) |
| Body Material | Cylindrical, Polyester |
| Dimensions | 1-1/8" Dia × 4-1/2" L (26.92mm × 117.6mm) |
| Certifications | UL Listed, CSA Certified, RoHS Compliant |
Applications
- Load centers and panelboards
- Switchboards and bus duct systems
- Feeder circuit protection
- Capacitor bank protection
- Lighting and heating circuits
- General-purpose commercial and industrial loads
- Branch circuit breaker backup protection
Frequently Asked Questions
- What is the Mersen A4J80?
- The Mersen A4J80 is an 80-amp, 600VAC/300VDC Class J fast-acting current-limiting fuse from the Amp-Trap® A4J series, designed for short-circuit and overcurrent protection in industrial and commercial power distribution systems.
- What is the interrupt rating of the A4J80?
- The A4J80 carries a 200kA interrupting rating at AC voltage and 100kA at DC voltage, making it suitable for high-fault-current installations.
- Is the A4J80 a rejection-type fuse?
- Yes. The A4J80 is a rejection-type Class J fuse. Its blade terminal dimensions are dimensionally unique and prevent the insertion of lower-rated, non-current-limiting fuses — a built-in safety design.
- What certifications does the Mersen A4J80 carry?
- The A4J80 is UL Listed, CSA Certified (to C22.2 standards), and RoHS compliant.
- Is Ferraz Shawmut A4J80 the same as Me
Specifications
- Part Number: A4J80
- Manufacturer : Mersen
- Brand : Mersen
- Category : Fuse
- Item Subcategory : Low Voltage Fuse
- Family : Amp-Trap
- Type : A4J
- Voltage : 600
- Amperage : 80
- AIC rating : 200kA@600V
- Diameter : 1.13
- Class Rating : J
- Barrels : 1
Product Data
- UPC : 782001960308
- GTIN : 00782001960308
- Country of Origin : Mexico
- Dimensions : x 4.63 in x
- Weight : 0.24 lb
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