Taiwan Semiconductor Corporation FRAF8JG

Overview

FRAF8JG from Taiwan Semiconductor is an 8A, 600V fast recovery rectifier diode in ITO-220AC package, designed for high-efficiency DC/DC converters and snubber circuits. It features 250A surge capability, 200ns reverse recovery time, and operates up to 150°C junction temperature - enabling robust performance in automotive-grade switching inverters and lighting power supplies.

For engineers reviewing the FRAF8JG datasheet, FRAF8JG pinout, FRAF8JG application, or FRAF8JG equivalent, key selection criteria include its AEC-Q101 qualification status (FRAF8JGH variant), low forward voltage (1.05V @ 8A/25°C), thermal resistance (R_θJC = 2.2°C/W), and glass-passivated junction reliability under repetitive surge stress.

Technical Context

The FRAF8JG is a single-die, unidirectional fast recovery rectifier optimized for high-frequency switching applications. Its 200ns trr and low junction capacitance (54pF @ 1MHz/4V) minimize switching losses in SMPS topologies, while the ITO-220AC package provides direct heatsink mounting with R_θJC = 2.2°C/W.

It supports operation across -55°C to +150°C junction range, with reverse leakage limited to 5µA at 25°C and 10µA at 125°C. The device uses matte tin-plated leads compliant with J-STD-002 and passes JESD201 Class 2 whisker testing.

Key Specifications

Pinout & Package

Package: ITO-220AC - Insulated TO-220 variant with isolated tab, UL 94V-0 molding compound, and matte tin-plated leads. Mounting via tab to heatsink; polarity marked on case.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH8R06DJF and IXYS MUR860E, the FRAF8JG offers balanced trade-offs: lower cost than MUR860E, better thermal resistance than STTH8R06DJF, and ITO-220AC isolation - making it optimal for industrial converters where tab isolation and surge robustness are critical.

Availability

FRAF8JG is available at Aetrix Electronics and suitable for DC/DC converters, lighting power supplies, and freewheeling applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified alternatives (FRAF8JGH).

Supply support for FRAF8JG 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.

The FRAF8JG belongs to TSC's high-voltage fast recovery rectifier product line, engineered for industrial switching power supplies and automotive auxiliary systems demanding high surge tolerance and thermal stability.

FAQ

What is the maximum junction temperature rating for the FRAF8JG?

The FRAF8JG has a maximum junction temperature (T_JMAX) of +150°C, verified per absolute maximum ratings table. This allows reliable operation in high-ambient environments such as enclosed LED drivers or under-hood automotive modules. Derating curves confirm usable current down to 0A at 150°C case temperature. Thermal design must account for R_θJC = 2.2°C/W and heatsink interface resistance to maintain FRAF8JG within this limit.

Is the FRAF8JG pin-compatible with standard TO-220AC rectifiers?

No - the FRAF8JG uses the ITO-220AC package, which features an electrically isolated tab, unlike standard TO-220AC. While lead spacing and footprint match, the isolated tab enables direct heatsink mounting without insulation hardware. Substituting a non-isolated TO-220AC part (e.g., STTH8R06DJF) requires mechanical redesign to prevent shorting. Always verify tab connectivity before replacement in existing FRAF8JG layouts.

Does the FRAF8JG meet AEC-Q101 reliability standards?

The base FRAF8JG is not AEC-Q101 qualified; however, the FRAF8JGH variant (same die, enhanced test screening) is explicitly qualified per AEC-Q101 Rev D. Qualification includes HTGB, TC, UHAST, and ESD testing. For automotive applications, specify FRAF8JGH - the "H" suffix denotes qualification. No requalification is needed if migrating from FRAF8JG to FRAF8JGH in existing designs, as electrical and thermal specs remain identical.

What is the reverse recovery time (t_rr) of the FRAF8JG under typical operating conditions?

The FRAF8JG has a maximum reverse recovery time (t_rr) of 200 ns, measured at I_F = 0.5A, I_R = 1.0A, and I_rr = 0.25A. This value is guaranteed across temperature and remains stable up to 125°C junction. In practical 100–200 kHz SMPS designs, this t_rr minimizes commutation loss and associated EMI, especially when paired with Si MOSFETs having <100ns turn-off times. The FRAF8JG datasheet specifies no typical-only values for t_rr - 200 ns is the production-tested upper limit.

How does the forward voltage (V_F) of the FRAF8JG vary with temperature and current?

The FRAF8JG exhibits negative temperature coefficient for V_F: at 8A, V_F drops from 1.05V at 25°C to 0.90V at 125°C. At 4A, it decreases from 0.96V to 0.80V over the same range. This behavior reduces conduction loss at elevated temperatures, improving thermal stability in sealed enclosures. All V_F values are measured with 0.3ms pulse width to avoid self-heating; DC operation requires derating per forward current derating curve in the FRAF8JG datasheet.