Taiwan Semiconductor Corporation KBL605G

Overview

KBL605G from Taiwan Semiconductor is a 6A, 600V repetitive peak reverse voltage (V_RRM) standard single-phase bridge rectifier in KBL package, featuring glass-passivated junctions, 175A non-repetitive surge capability, and UL Recognized (E-326243) construction-used in AC/DC front-end stages of industrial power adapters and LED drivers.

For engineers reviewing the KBL605G datasheet, KBL605G pinout, KBL605G application, or KBL605G equivalent, key selection criteria include V_RRM = 600 V, I_F = 6 A, V_F ≤ 1.1 V @ 6 A, R_θJA = 13 °C/W, and KBL package thermal performance for convection-cooled PCB layouts.

Technical Context

The KBL605G integrates four silicon diodes in a single-phase full-wave bridge configuration with quad-anode/cathode internal layout. Its glass-passivated junction ensures stable reverse leakage (<500 µA @ 125°C) and robust surge immunity (I_FSM = 175 A, 8.3 ms sine).

Thermally, it delivers R_θJL = 7.5 °C/W to lead and R_θJA = 13 °C/W to ambient, enabling 6 A continuous operation at T_A ≤ 70°C on FR-4 PCBs with ≥25 cm² copper pour-no heatsink required for typical SMPS adapter duty cycles.

Key Specifications

Pinout & Package

Package: KBL - molded plastic body (19.5 × 15.2 × 4.6 mm), matte tin-plated leads, UL 94V-0 rated, JESD201 Class 1A whisker compliant, polarity marked on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU6K and W04M, the KBL605G uniquely balances 600 V blocking, 6 A current, and UL recognition in the KBL package-making it optimal for mid-power industrial and lighting applications where safety certification and thermal headroom are prioritized over extreme voltage margin or miniaturization.

Availability

KBL605G is available at Aetrix Electronics and suitable for switching mode power supplies, LED drivers, and industrial AC/DC adapters requiring stable component supply, long-lifecycle availability, and certified safety compliance.

Supply support for KBL605G 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, serving global industrial, computing, and consumer markets since 1979.

The KBL605G belongs to TSC's standard bridge rectifier product line, engineered for high-reliability AC/DC conversion in cost-sensitive, thermally constrained power supplies where safety certification and long-term stability are mandatory.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for KBL605G?

The KBL605G has a V_RRM of 600 V, confirmed in the Absolute Maximum Ratings table of Taiwan Semiconductor's official datasheet (Version H2308). This rating applies across the full operating junction temperature range (−55°C to +150°C) and defines the highest instantaneous reverse voltage the device can block repeatedly without breakdown. It is distinct from the 420 V RMS reverse voltage rating (V_R(RMS)).

Does KBL605G require a heatsink for 6 A continuous operation?

No, KBL605G does not require an external heatsink when operated at 6 A average forward current in typical PCB conditions. With R_θJA = 13 °C/W and T_J(max) = 150°C, it sustains 6 A at ambient temperatures up to 70°C using ≥25 cm² of 2-oz copper on a 2-layer FR-4 board-verified by thermal derating curves in the KBL601G–KBL607G datasheet.

Is KBL605G RoHS compliant and lead-free solder compatible?

Yes, KBL605G is RoHS compliant and features matte tin-plated leads qualified per J-STD-002 for lead-free soldering. It also passes JESD201 Class 1A whisker testing, ensuring reliability in high-reliability industrial and automotive-qualified applications where tin whisker growth must be mitigated.

What is the marking code and polarity identification for KBL605G?

The KBL605G is marked "KBL605G" on the top surface of the KBL package, with polarity indicated by a white bar adjacent to the "+" terminal. The four terminals are arranged in line: ~AC1, ~AC2, +, − - with the "+" and "−" terminals located at opposite ends of the package, as shown in the Marking Diagram and Package Outline Dimensions (Page 4, Version H2308).

How does KBL605G compare to KBL604G and KBL606G in terms of voltage rating?

KBL605G is rated for 600 V V_RRM, positioned between KBL604G (400 V) and KBL606G (800 V) in the same family. All share identical I_F = 6 A, I_FSM = 175 A, thermal resistance, and package. Selection depends strictly on system peak line voltage: KBL605G targets 230 VAC mains (325 V peak) with 1.85× margin, while KBL604G suits 115 VAC and KBL606G fits 400 VAC industrial inputs.