0463015.ER datasheet: Complete specs & footprint guide

2026-01-24 12:48:36

The 0463015.ER is a high-performance surface-mount, very-fast-acting 2-SMD fuse designed for robust circuit protection. Rated at 15 A and supporting 250 VAC / 100 VDC, it is critical for high-current PCB designs where low resistance (~0.0047 Ω) and high interrupt capability are essential.

Quick Overview & Key Specifications

Quick-Spec Snapshot

Parameter	Value (Typical/Test)
Current Rating	15 A Continuous
Voltage Rating	250 VAC / 100 VDC
Interrupt Rating	100 A AC / 50 A DC (typ.)
Typical Resistance	~0.0047 Ω
Operating Temp	Refer to datasheet (Ambient/Junction)
Package	2-SMD, Square Ends; Very Fast-Acting

Design Insight: Designers require this compact spec snapshot for rapid triage. The 15 A continuous rating coupled with low R_on minimizes I²R heating, while the interrupt ratings define safe fault clearing boundaries for both AC and DC domains.

Electrical & Thermal Performance Deep-Dive

Interruption Capacity

Continuous current differs significantly from interrupt capability. While rated at 15 A, it can clear peak faults up to 100 A AC. Note that DC interruption is lower (50 A) because DC lacks a zero-crossing point, sustaining arc energy longer.

AC Interrupt Rating (100A)

DC Interrupt Rating (50A)

Derating & Temperature

The very-fast-acting curve governs trip time. A common engineering rule: derate continuous current by 10–25% depending on PCB thermal resistance and airflow. Ambient heat and nearby high-power components will shift the T-vs-I curves.

Mechanical & Footprint Implementation

Mechanical Interpretation

Accurate land patterns start with rigorous reading of tolerance blocks. Pay close attention to view orientation and datum references. Verify critical pad-to-pad spacing against your CAD model to prevent solder bridging or component misplacement.

Assembly Constraints

Recommended paste aperture should be 60–80% of the pad area for mass control. Follow specific reflow profiles to mitigate "tombstoning"—a common risk with small SMD components during rapid cooling or uneven wetting.

Design & Procurement Checklist

✓ Confirm continuous and interrupt ratings for specific load.
✓ Verify derating based on PCB copper weight (2oz vs 1oz).

✓ Define XY courtyard and thermal relief settings in EDA.
✓ Run fault simulation and thermal imaging on first-article boards.

Common Questions (FAQ)

What are the key 0463015.ER datasheet checks before layout? +

Essential checks include continuous current vs. ambient temperature, interrupt ratings (especially for DC rails), and typical resistance to calculate voltage drop. Ensure the mechanical land-pattern matches the datasheet's specific pad geometry and paste recommendations to achieve reliable electrical contact and thermal performance.

How should I size PCB traces for a 15A fuse footprint? +

Use the 15 A continuous rating as the baseline and apply IPC-2152 standards for trace width sizing. Account for allowable temperature rise (typically 10°C or 20°C above ambient) and use heavy copper pours or thermal reliefs to manage I²R heating effectively without compromising the fuse's trip characteristics.

What reflow and inspection steps are recommended? +

Adhere to the manufacturer’s specified reflow profile limits, focusing on the peak temperature and soak time. Use a 60–80% paste aperture to ensure sufficient mass. Post-assembly, use X-ray or high-resolution visual inspection to check for full solder fillets and the absence of voids or tombstoning.

Key Summary

● The 0463015.ER is a 15 A, very-fast-acting SMD fuse with low resistance (~0.0047 Ω) for minimal insertion loss.
● Always account for DC derating and ambient temperature when sizing for motor drives or DC-DC converters.
● Implement precise PCB footprints with thermal relief to ensure long-term reliability and accurate fault clearing.

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