Skyworks Solutions Inc. SKY87604-13

Overview

SKY87604-13 from Skyworks Solutions is a fast-acting, over-molded fuse rated at 375 mA, operating from –40 °C to +125 °C, housed in a 3.0 mm × 3.0 mm, 4-lead MCM package, and certified to UL 60079-11 for intrinsic safety in hazardous environments-used in gas meter modules to protect against overcurrent during surge events.

For engineers reviewing the SKY87604-13 datasheet, SKY87604-13 pinout, SKY87604-13 application, or SKY87604-13 equivalent, key selection criteria include I²t rating for inrush tolerance, UL 60079-11 compliance for explosion-proof designs, lead-free reflow compatibility, and 0.5 mm minimum non-metallic encapsulation thickness around the fuse element.

Technical Context

The SKY87604-13 implements a fast-acting fuse structure with high I²t capability to withstand transient inrush currents without nuisance tripping, while maintaining precise 375 mA nominal hold current. Its over-molded construction ensures ≥0.5 mm non-metallic clearance per UL 60079-11, isolating metallic terminals from external conductive surfaces.

This device functions as a single-pole, dual-terminal (pins 1 & 4 = terminal 1; pins 2 & 3 = terminal 2) passive overcurrent protection element. It requires pairing with a UL-recognized component fuse per design guidance and supports both leaded and lead-free soldering processes.

Key Specifications

Pinout & Package

SKY87604-13 uses a 4-lead, 3.0 mm × 3.0 mm molded chip module (MCM) package with moisture sensitivity level 3 (MSL3) and Pb-free terminations.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast-acting fuse applications.

Compared with Littelfuse 0ZCM375-2A and Bourns MF-MSMF375, the SKY87604-13 uniquely delivers UL 60079-11 compliance in a 3.0 mm × 3.0 mm footprint with verified high I²t tolerance-making it the only option qualified for gas meter intrinsic safety barriers without external insulation augmentation.

Availability

SKY87604-13 is available at Aetrix Electronics and suitable for gas meter modules, industrial flow sensor subsystems, and smart utility meter power rails requiring stable component supply, intrinsic safety certification, and high-reliability overcurrent protection.

Supply support for SKY87604-13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions for wireless, automotive, and industrial markets.

The SKY87604-13 belongs to Skyworks' protected circuit portfolio, engineered specifically for intrinsic safety–critical applications such as gas, water, and utility metering in hazardous locations.

FAQ

What is the rated hold current and trip behavior of the SKY87604-13?

The SKY87604-13 is rated for a nominal hold current of 375 mA under steady-state DC conditions. It exhibits fast-acting thermal trip behavior, interrupting currents significantly above its rating within milliseconds. Its high I²t value allows survival of brief inrush surges-such as those from solenoid valves-without nuisance tripping, while reliably opening during sustained overloads. This behavior is validated per UL 60079-11 test protocols.

Does the SKY87604-13 meet UL 60079-11 for intrinsic safety applications?

Yes, the SKY87604-13 is designed and certified to satisfy UL 60079-11, which mandates that the fuse element be fully surrounded by at least 0.5 mm of non-metallic material. Its over-molded construction achieves this requirement inherently, eliminating the need for additional potting or spacing hardware in gas meter and hazardous-area designs. The SKY87604-13 documentation explicitly references UL 60079-11 compliance.

What is the package type and soldering compatibility of the SKY87604-13?

The SKY87604-13 uses a 4-lead, 3.0 mm × 3.0 mm molded chip module (MCM) package rated MSL3 per IPC/JEDEC J-STD-020C, with peak reflow temperature support up to 260 °C. It is 100% lead-free, RoHS-compliant, and halogen-free, and is compatible with both leaded and lead-free wave and reflow soldering processes-ensuring robust manufacturability in high-volume meter production lines.

How are the four pins configured electrically on the SKY87604-13?

The SKY87604-13 has a dual-terminal configuration: Pins 1 and 4 are electrically common as Terminal 1 (T1), and Pins 2 and 3 are electrically common as Terminal 2 (T2). This arrangement provides redundant connections per terminal to reduce contact resistance, improve current sharing, and enhance mechanical reliability during thermal cycling-critical for long-life deployments in utility metering applications.

Is the SKY87604-13 suitable for use in explosion-proof enclosures or hazardous locations?

Yes-the SKY87604-13 is explicitly intended for intrinsic safety–critical applications in hazardous locations, including Class I Division 1 and Zone 0 environments. Its UL 60079-11 certification confirms compliance with energy-limiting requirements for explosion-proof barrier designs. When used per Skyworks' application guidance and paired with a UL-recognized component fuse, the SKY87604-13 enables full system-level intrinsic safety certification in gas meter modules.