FERRAZ SHAWMUT TIME DELAY FUSE ATQR30

FERRAZ SHAWMUT TIME DELAY FUSE ATQR30 – Industrial Amp-Trap 2000® Class CC Power Fuse

The FERRAZ SHAWMUT TIME DELAY FUSE ATQR30 (Mersen / Ferraz Shawmut Amp-Trap 2000® series, catalog number ATQR30 / F200864) is a high-performance Class CC current-limiting fuse specifically engineered for maximum protection of control transformers, solenoids, and inductive loads. Designed to withstand high magnetizing inrush currents without nuisance opening, the FERRAZ SHAWMUT TIME DELAY FUSE ATQR30 delivers dependable branch-circuit overcurrent protection.

As shown in the product image, the fuse utilizes a high-grade fiberglass body construction fitted with bright tin-plated copper ferrule caps and an iconic Class CC rejection tip. Rated at $30text{ A}$ ( $600text{ VAC}$ ), it provides exceptional current-limiting capabilities to protect downstream electrical components against extreme short-circuit fault conditions.

Key Features of the FERRAZ SHAWMUT TIME DELAY FUSE ATQR30

Optimized Inrush Time-Delay: Specifically engineered with exceptional time-delay characteristics to easily absorb high magnetizing inrush currents from control transformers and motor starters.
Extreme Current Limitation: Operates fast under severe short-circuit conditions to significantly limit peak let-through current and fault energy, preventing equipment damage.
Rejection-Style Class CC Design: Features a specialized rejection tip on the ferrule cap to prevent accidental replacement with lower-rated supplemental fuses.
High Interrupting Rating: Delivers a $200,000text{ A RMS}$ symmetrical interrupting rating at $600text{ VAC}$ , making it suitable for high fault-current capacity networks.
Durable Fiberglass Body: Constructed with a high-density, dimensional-stability fiberglass body that ensures reliable electrical performance under demanding thermal conditions.
Global Safety Certifications: Meets UL 248-4 (Class CC Standards), CSA Certified C22.2 No. 248.4, and CE guidelines.

Common Applications and Industrial Usage

The specialized current-limiting and time-delay characteristics of the FERRAZ SHAWMUT TIME DELAY FUSE ATQR30 make it a top choice for commercial and industrial control applications:

Control Transformer Primary Protection: Protects primary power circuits on control transformers that experience extreme magnetizing current spikes upon energization.
Inductive Load Circuits: Shields solenoids, contactors, and electromagnetic holding coils against overcurrent and short-circuit faults.
Industrial Control Panels (UL 508A): Serves as compact main branch or sub-branch circuit protection in space-constrained industrial automation and control enclosures.
HVAC & Motor Controllers: Protects branch motor circuits, rooftop HVAC units, air compressors, and small motor controllers against fault-current damage.

Technical Specifications

The electrical limits, physical dimensions, and operational characteristics of the FERRAZ SHAWMUT TIME DELAY FUSE ATQR30 comply with standard Class CC specs:

Parameter Specification	Technical Details & Operational Values
Component Classification	Amp-Trap 2000® Class CC Time-Delay Power Fuse
Primary Target Keyword	FERRAZ SHAWMUT TIME DELAY FUSE ATQR30
Manufacturer Catalog / Reference	Mersen (Ferraz Shawmut) `ATQR30` / `F200864`
Amperage Rating	$30text{ A}$
Voltage Ratings	$600text{ VAC} / 300text{ VDC}$
AC Interrupting Rating (AIR)	$200,000text{ A RMS}$ Symmetrical @ $600text{ VAC}$
DC Interrupting Rating	$100,000text{ A}$ @ $300text{ VDC}$
Time-Delay Characteristics	Minimum 12 seconds @ $200%$ rated current
Body Material / Terminal Caps	High-Density Fiberglass / Tin-Plated Copper Ferrules
Physical Dimensions	Diameter: $10.3text{ mm}$ ( $13/32text{"}$ ) $times$ Length: $38.1text{ mm}$ ( $1text{-}1/2text{"}$ )
Terminal / Mount Style	Ferrule / Class CC Rejection Feature
Direct Cross-References	Littelfuse `KLDR030`, Bussmann `FNQ-R-30`

Installation Guidelines and Best Practices

Safety Precaution: Isolate and de-energize main supply breakers before inspecting, inserting, or replacing branch power fuses.

Rejection Holder Compatibility: Install only in UL-approved Class CC rejection-style fuse blocks or finger-safe DIN-rail fuse holders (such as Mersen USCC series).

Transformer Sizing Rules: Follow NEC Article 450 guidelines when sizing control transformer primary protection—typically sizing ATQR fuses at $300%$ to $500%$ of primary full-load current (FLA).

Visual Verification: Ensure the rejection tip seats fully inside the rejection slot of the fuse block to guarantee a firm, low-resistance connection.

To review official class CC time-delay fuse curves, rejection dimensions, and complete Amp-Trap catalog specifications, consult the global Mersen Electrical Circuit Protection Directory.

To evaluate real-time regional warehouse stock availability or request commercial quotes for bulk procurement needs, please connect with our sales branch via the Control Qatar Contact Page.

FERRAZ SHAWMUT TIME DELAY FUSE ATQR30