Taiwan Semiconductor Corporation UG06B

Overview

UG06B from Taiwan Semiconductor is a single-die ultrafast rectifier diode rated for 100 V repetitive peak reverse voltage (V_RRM), 0.6 A average forward current (I_F), and 15 ns reverse recovery time (t_rr), designed for high-frequency switching in DC-DC converters and freewheeling paths.

For engineers reviewing the UG06B datasheet, UG06B pinout, UG06B application, or UG06B equivalent, key selection criteria include its TS-1 package thermal resistance (R_θJL = 28 °C/W), low forward voltage (V_F ≤ 0.95 V at 0.6 A), and AEC-Q101 qualification option - critical for automotive power supply designs requiring reliability under thermal stress.

Technical Context

The UG06B employs an ultrafast recovery silicon PN junction optimized for minimal reverse recovery charge (Q_rr) and low junction capacitance (C_J = 9 pF at 4 V), enabling efficient operation in 100–500 kHz switching topologies. Its 150 °C maximum junction temperature and 28 °C/W junction-to-lead thermal resistance support sustained conduction in compact, thermally constrained layouts.

Unlike standard fast recovery diodes, the UG06B achieves sub-20 ns t_rr with controlled softness (I_rr = 0.25 A test condition), reducing EMI generation during turn-off in synchronous buck and flyback secondary-side rectification circuits.

Key Specifications

Pinout & Package

Package: TS-1 - surface-mount, single-anode/single-cathode molded plastic case with pure tin-plated leads (J-STD-002 compliant), polarity indicated by cathode band, UL 94V-0 rated molding compound, 0.200 g weight.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast rectifier applications.

Compared with STTH1R06 and ES1B, the UG06B delivers optimal balance of 100 V rating, 15 ns speed, and TS-1 thermal performance - making it preferred for space-constrained, high-efficiency 12–24 V automotive and industrial converters where layout density and EMI control are critical.

Availability

UG06B is available at Aetrix Electronics and suitable for DC-DC converters, automotive body control modules, and industrial sensor node power management requiring stable component supply across production lifecycles.

Supply support for UG06B 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power devices, rectifiers, and protection components since 1979.

The UG06x series belongs to TSC's ultrafast rectifier product line, engineered specifically for high-frequency switching power supplies in automotive, industrial, and consumer applications where low recovery loss and thermal robustness are essential.

FAQ

What is the maximum junction temperature rating for UG06B?

The UG06B has a maximum junction temperature (T_J) of +150 °C, verified per absolute maximum ratings table in the G2104 datasheet. This rating applies across the full operating current range and enables reliable use in sealed enclosures or high-ambient environments. Derating curves confirm usable conduction up to 125 °C ambient when mounted on ≥10 mm² copper. The UG06B must not exceed this limit to maintain long-term parametric stability.

Is UG06B pin-compatible with UG06A or UG06C?

Yes - UG06B shares identical TS-1 package dimensions, anode/cathode terminal layout, and marking orientation with UG06A, UG06C, and UG06D. All variants use the same mechanical outline and solder pad footprint. However, electrical parameters differ: UG06B is rated for 100 V V_RRM, while UG06A is 50 V and UG06C is 150 V. Substitution requires verification of reverse voltage margin in the target circuit.

Does UG06B meet AEC-Q101 reliability standards?

The base UG06B is not AEC-Q101 qualified; however, the variant UG06BH (ordering code with "H" suffix) is fully AEC-Q101 certified per Rev G2104 documentation. UG06BH undergoes stress testing including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing (uHAST). For automotive applications, specify UG06BH - the UG06B alone is intended for industrial and commercial use.

What is the reverse recovery time test condition for UG06B?

The UG06B reverse recovery time (t_rr) is measured under the condition: I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A, with specified test circuit per Figure 6 of the G2104 datasheet. This reflects real-world hard-switching behavior in buck and flyback converters. The typical value is 15 ns, with no maximum guaranteed - design margins should account for process variation and temperature drift.

How does the TS-1 package of UG06B compare thermally to SMA or DO-214AC packages?

The TS-1 package of UG06B delivers R_θJL = 28 °C/W, significantly better than SMA (≈65 °C/W) and DO-214AC (≈50 °C/W) equivalents. This results from its thicker leadframe and optimized internal bond wire geometry. In practice, UG06B runs ~15 °C cooler than ES1B (SMA) at 0.6 A continuous in identical PCB layouts, directly improving long-term reliability and allowing tighter thermal design margins.