Diodes Incorporated BAT42W-7-F

Overview

BAT42W-7-F from Diodes Incorporated is a surface-mount Schottky barrier diode in SOD-123 package, rated for 30 V peak repetitive reverse voltage, 200 mA forward continuous current, and 5.0 ns reverse recovery time. It delivers low forward voltage drop (0.26 V at 200 mA), fast switching, and operates across –55 °C to +125 °C - widely used in high-frequency rectification and polarity protection circuits in DC-DC converters.

For engineers reviewing the BAT42W-7-F datasheet, BAT42W-7-F pinout, BAT42W-7-F application, or BAT42W-7-F equivalent, key selection criteria include its 0.26 V VF at 200 mA, 5.0 ns trr, 10 pF CT at 1.0 V, 30 V VRRM rating, and SOD-123 thermal resistance of 500 °C/W - critical for compact power management and RF detector designs.

Technical Context

This Schottky diode uses a platinum-silicide or similar low-barrier metal-semiconductor junction to achieve minimal forward voltage and ultrafast recovery. Its low junction capacitance (10 pF at 1 V) and sub-5 ns trr support operation up to 45 MHz with 80% rectification efficiency under defined RF conditions.

The device is optimized for low-loss, high-speed switching in space-constrained layouts: the SOD-123 footprint enables automated placement, while its 0.01 g mass and UL 94V-0 mold compound meet reliability requirements for industrial and consumer power stages.

Key Specifications

Pinout & Package

SOD-123 surface-mount package: 2-terminal, cathode-banded anode-cathode configuration; molded plastic body (UL 94V-0), 3.55–3.85 mm length, 2.55–2.85 mm width, 1.40–1.70 mm height; moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky diode applications.

Compared with SBAT54LT1G and 1N5711, BAT42W-7-F uniquely balances ultra-low VF (0.26 V), 5 ns speed, and SOD-123 manufacturability - making it optimal for miniaturized, efficiency-critical 3.3–5 V power paths where thermal budget and board area are constrained.

Availability

BAT42W-7-F is available at Aetrix Electronics and suitable for DC-DC converter output rectification, RF signal detection, and polarity protection requiring stable component supply across industrial automation, IoT edge nodes, and consumer power adapters.

Supply support for BAT42W-7-F 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the US.

The BATxW series targets high-frequency, low-loss applications in portable and space-constrained electronics - emphasizing Schottky performance in standardized SMD packages for automated assembly.

FAQ

What is the maximum junction temperature for BAT42W-7-F?

The absolute maximum junction temperature is +125 °C, matching its specified operating range. Derating begins above +25 °C ambient per Figure 1: at +85 °C ambient, maximum continuous forward current drops to ~120 mA due to RJA = 500 °C/W and Pd = 200 mW limit.

Does BAT42W-7-F have a built-in guard ring or passivation layer?

No guard ring is specified. The device uses standard Schottky junction construction with silicon die passivated by oxide/nitride layers per Diodes Incorporated's SOD-123 process flow; this provides sufficient surface stability for industrial humidity exposure but does not constitute edge termination for high-voltage ruggedness.

Can BAT42W-7-F replace BAT46 in the same PCB layout?

No - BAT46 uses DO-35 package and has 100 V VRRM, 0.45 V VF @ 10 mA, and different thermal characteristics. BAT42W-7-F is SOD-123 only; mechanical and electrical mismatch makes direct replacement impossible without board redesign.

Is BAT42W-7-F suitable for use in Class 2 medical power supplies?

It meets isolation and creepage requirements only as a secondary-side component. Its 30 V VRRM and lack of reinforced insulation rating preclude primary-side use; however, it is commonly deployed in patient-connected DC-DC outputs where SELV compliance is maintained via system-level design.