Toshiba Semiconductor and Storage DF2S12FU,H3F

Overview

DF2S12FU,H3F from TOSHIBA is a two-terminal ESD protection diode rated for ±20 kV IEC61000-4-2 contact discharge, with 12.0 V nominal Zener voltage (IZ = 5 mA), 15 pF typical total capacitance, and 150 mW power dissipation - deployed on high-speed USB 2.0 data lines to suppress transient overvoltage without signal degradation.

For engineers reviewing the DF2S12FU,H3F datasheet, DF2S12FU,H3F pinout, DF2S12FU,H3F application, or DF2S12FU,H3F equivalent, key selection criteria include guaranteed ±20 kV ESD immunity, low 15 pF capacitance for <480 Mbps data integrity, 12 V clamping voltage, ultra-small USC package footprint, and strict single-function ESD-only usage compliance.

Technical Context

This device implements a single Zener-based ESD clamp structure optimized for bidirectional transient suppression. It operates exclusively in reverse-bias breakdown during ESD events, with no forward conduction intended for steady-state voltage regulation.

Its electrical behavior is defined by three critical parameters: 12.0 V nominal Zener voltage at 5 mA, ≤0.05 μA reverse leakage at 9 V, and 15 pF total capacitance at 0 V bias and 1 MHz - all specified at Ta = 25°C and validated per IEC61000-4-2 test methodology.

Key Specifications

Pinout & Package

DF2S12FU,H3F is housed in a two-pin ultra-small USC (Unit Small Chip) package measuring 1.0 × 0.6 × 0.35 mm (typ.), weighing 4.5 mg, with top-view marking "1-1E1A". The package is surface-mount, lead-free, and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NZQ2S12MUTCG and ESDBLE5.0D1W, DF2S12FU,H3F uniquely balances 12 V clamping, 15 pF capacitance, and ±20 kV immunity in a 1.0 × 0.6 mm USC package - making it optimal for 12 V-tolerant high-speed digital interfaces where both voltage headroom and signal fidelity matter.

Availability

DF2S12FU,H3F is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI DDC line safeguarding, and industrial sensor analog output shielding requiring stable component supply across production lifecycles.

Supply support for DF2S12FU,H3F 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 performance.

DF2S12FU,H3F belongs to Toshiba's ESD protection diode product line, engineered specifically for high-density, high-speed signal line protection in consumer and industrial electronics - not for voltage regulation or general-purpose rectification.

FAQ

What is the primary function of the DF2S12FU,H3F?

The DF2S12FU,H3F is a dedicated ESD protection diode designed solely to suppress electrostatic discharge transients on signal lines. It is not rated for continuous Zener regulation, voltage reference, or rectification. Its 12.0 V Zener voltage, ±20 kV IEC61000-4-2 immunity, and 15 pF capacitance define its role as a transient voltage clamp - and the DF2S12FU,H3F must be applied strictly per Toshiba's ESD-only usage guidance.

Can DF2S12FU,H3F be used on 3.3 V or 5 V logic lines?

DF2S12FU,H3F is not recommended for 3.3 V or 5 V logic lines because its 12.0 V Zener voltage provides insufficient clamping margin - transients may exceed downstream IC absolute maximum ratings before the DF2S12FU,H3F activates. For such rails, lower-V_Z devices like 5.0 V ESD diodes (e.g., Vishay ESDBLE5.0D1W) are appropriate. DF2S12FU,H3F is intended for 12 V-tolerant interfaces such as certain USB, industrial analog, or automotive body-control signals.

What does the "H3F" suffix indicate in DF2S12FU,H3F?

The "H3F" suffix denotes Toshiba's tape-and-reel packaging specification: 8 mm carrier tape, 3 mm pocket pitch, and Fuji-compatible embossed reel format (3,000 pcs/reel). It does not affect electrical characteristics. The core device remains DF2S12FU - same Zener voltage, capacitance, ESD rating, and USC package - and DF2S12FU,H3F is fully interchangeable with DF2S12FU in circuit design.

Is DF2S12FU,H3F RoHS compliant and lead-free?

Yes, DF2S12FU,H3F is RoHS compliant and lead-free, consistent with Toshiba's environmental specifications for the USC package family. The device uses lead-free solderable terminations and meets EU RoHS Directive 2011/65/EU requirements. Material declarations and test reports are available upon request, and DF2S12FU,H3F is suitable for green manufacturing processes without exemption waivers.

What is the maximum operating temperature for DF2S12FU,H3F?

The maximum junction temperature (T_j) for DF2S12FU,H3F is 125 °C, and the storage temperature range is −55 to +125 °C. Ambient operating temperature must be derated based on power dissipation and PCB thermal design - for example, at 70 °C ambient, allowable continuous power drops significantly below 150 mW. Thermal design guidance is provided in the Toshiba Semiconductor Reliability Handbook, and DF2S12FU,H3F must not be operated beyond its specified T_j limit.