Toshiba Semiconductor and Storage DF5A6.2FU(TE85L,F)

Overview

DF5A6.2FU(TE85L,F) from TOSHIBA is a quad-channel ESD protection diode array designed for high-density I/O line protection in portable electronics. It features 6.2 V nominal Zener voltage, ±30 kV IEC61000-4-2 contact discharge immunity, 55 pF typical terminal capacitance at 0 V, and a 200 mW power dissipation rating. It is used on USB, HDMI, and audio interface lines to suppress transient overvoltage without signal distortion.

For engineers reviewing the DF5A6.2FU(TE85L,F) datasheet, DF5A6.2FU(TE85L,F) pinout, DF5A6.2FU(TE85L,F) application, or DF5A6.2FU(TE85L,F) equivalent, key selection criteria include ESD immunity level, channel count per package, junction capacitance, Zener voltage tolerance, and thermal derating behavior under repeated pulse stress.

Technical Context

This device implements four independent Zener-clamp diodes in a single ultra-compact surface-mount package, with each cathode isolated and sharing a common anode connection. Its clamping action activates above 6.2 V (±0.4 V), limiting transient voltages while maintaining low dynamic impedance (<30 Ω) and minimal leakage (<1.0 μA at 3 V reverse).

The design targets high-speed digital interfaces where low capacitance (55 pF) and fast response are critical. It is not rated for continuous voltage regulation or power dissipation beyond transient suppression - operation outside ESD protection use violates its specified functional scope.

Key Specifications

Pinout & Package

DF5A6.2FU(TE85L,F) uses the TOSHIBA proprietary 5-pin SOT-353 (1-2V1B) package - a 1.6 × 1.6 × 0.55 mm ultra-small outline transistor with gull-wing leads. The package integrates four cathodes and one shared anode in a compact footprint optimized for space-constrained mobile PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ESD protection applications.

Compared with DF5A6.2FU(TE85L,F), the NUP4201MR6T1G offers lower capacitance but requires quadrupling for equivalent channel count, increasing layout complexity and BOM cost; no valid alternative matches its integrated quad-cathode/anode topology and 55 pF/±30 kV balance in a single 1.6 × 1.6 mm package.

Availability

DF5A6.2FU(TE85L,F) is available at Aetrix Electronics and suitable for USB interface protection, HDMI signal line safeguarding, smartphone audio jack hardening, and industrial sensor front-end ESD mitigation requiring stable component supply and long-term production continuity.

Supply support for DF5A6.2FU(TE85L,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

Toshiba Electronic Devices & Storage Corporation designs and manufactures discrete semiconductors, power devices, and logic ICs with emphasis on reliability, miniaturization, and application-specific optimization for consumer, industrial, and automotive markets.

The DF5A6.2FU(TE85L,F) belongs to Toshiba's DF5 series of ultra-compact ESD protection arrays, developed specifically to reduce component count and PCB footprint in high-density portable electronics without compromising IEC-level surge immunity.

FAQ

What is the primary function of the DF5A6.2FU(TE85L,F)?

The DF5A6.2FU(TE85L,F) is a quad-channel ESD protection diode array engineered exclusively for transient voltage suppression on signal lines. It is not intended for voltage regulation or continuous power dissipation. Its Zener-based clamping structure activates above 6.2 V to divert electrostatic discharge energy safely to ground, preserving downstream ICs. This functional scope is explicitly defined in Toshiba's product documentation.

Does the DF5A6.2FU(TE85L,F) support bidirectional ESD protection?

Yes, the DF5A6.2FU(TE85L,F) provides bidirectional ESD protection per channel. Each cathode-anode pair operates symmetrically: forward conduction occurs when the cathode is ~0.7 V more positive than the anode, and reverse Zener breakdown initiates near 6.2 V. This dual-mode behavior enables protection against both positive and negative ESD transients on any protected line connected to a cathode pin.

What is the significance of the "TE85L,F" suffix in DF5A6.2FU(TE85L,F)?

The "TE85L,F" suffix denotes Toshiba's tape-and-reel packaging specification: TE = embossed carrier tape, 85 = 8 mm tape width, L = standard orientation (component facing up), and F = RoHS-compliant lead-free finish. This packaging format ensures compatibility with automated SMT placement equipment and meets environmental compliance requirements for commercial electronics manufacturing.

Can DF5A6.2FU(TE85L,F) be used for overvoltage protection beyond ESD events?

No - the DF5A6.2FU(TE85L,F) is qualified only for electrostatic discharge protection per IEC61000-4-2. Toshiba explicitly restricts its use to ESD suppression and prohibits application as a constant-voltage regulator or sustained overvoltage clamp. Repeated exposure to non-ESD transients (e.g., lightning-induced surges or inductive switching spikes) exceeds its 200 mW power rating and risks irreversible junction damage.

How does the DF5A6.2FU(TE85L,F) compare to single-channel ESD diodes in terms of PCB layout efficiency?

The DF5A6.2FU(TE85L,F) replaces four discrete 0402 or SOD-323 ESD diodes with one 1.6 × 1.6 mm SOT-353 package, reducing occupied PCB area by >70% and eliminating four solder joints. Its shared anode simplifies grounding - only one low-inductance ground trace is needed versus four separate returns. This layout efficiency directly improves yield in fine-pitch mobile PCB assemblies.