Taiwan Semiconductor Corporation TBS808

Overview

TBS808 from Taiwan Semiconductor is an 8A, 800V repetitive peak reverse voltage standard bridge rectifier in TBS package, featuring glass-passivated junctions, UL recognition (E-326854), and J-STD-020 Level 1 moisture sensitivity - used in AC-to-DC conversion stages of switching mode power supplies.

For engineers reviewing the TBS808 datasheet, TBS808 pinout, TBS808 application, or TBS808 equivalent, key selection criteria include its 800V V_RRM, 200A I_FSM (8.3ms), 0.97V max forward voltage at 8A/25°C, 13°C/W R_θJL, and quad configuration with matte tin-plated leads compliant to J-STD-002.

Technical Context

The TBS808 integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode and common-anode terminals. Its glass-passivated junction ensures stable reverse leakage (<5µA @ 25°C) and thermal robustness up to 150°C junction temperature.

Designed for surface-mount automated placement, it meets UL 94V-0 flammability, JESD201 Class 1 whisker resistance, and RoHS/halogen-free compliance per IEC 61249-2-21 - enabling reliable operation in high-density PCB layouts with 16mm × 16mm Cu pad thermal management.

Key Specifications

Pinout & Package

Package: TBS - surface-mount molded case with matte tin-plated leads, 10.0–10.4 mm width (D), 9.7–10.1 mm length (E), 6.8–7.2 mm body width (E1), 4.9–5.1 mm lead pitch (e), and 0.5–1.1 mm lead length (L). Complies with JEDEC MS-012 variant outline.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU8K and MB10F, the TBS808 offers superior thermal resistance (13°C/W R_θJL vs. >30°C/W), UL recognition for system-level certification, and J-STD-020 Level 1 handling - making it optimal for compact, certified, high-reliability AC-DC front-ends.

Availability

TBS808 is available at Aetrix Electronics and suitable for switching mode power supplies, industrial AC-DC adapters, and LED driver power stages requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TBS808 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 TBS series was developed specifically for high-reliability, surface-mount bridge rectification in space-constrained AC-DC power supplies - emphasizing thermal efficiency, automated assembly compatibility, and regulatory compliance.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) of the TBS808?

The TBS808 has a V_RRM of 800 V, as confirmed in the Absolute Maximum Ratings table on page 2 of the official Taiwan Semiconductor datasheet (Version A2010). This rating applies per diode within the quad bridge configuration and defines the maximum allowable reverse voltage during normal operation without breakdown.

Does the TBS808 require baking before reflow soldering?

No, the TBS808 does not require baking before reflow soldering. It is rated J-STD-020 Level 1 for moisture sensitivity, meaning it has unlimited floor life at ≤30°C/60% RH. This eliminates pre-reflow bake steps in standard SMT assembly lines, reducing process complexity and cost.

Is the TBS808 UL recognized, and what is its file number?

Yes, the TBS808 is UL Recognized with file number E-326854, as stated in the FEATURES section of the official datasheet. This recognition covers the entire TBS806–TBS810 family and validates compliance with UL 60950-1 and UL 62368-1 for end-product safety certification.

What is the forward voltage drop of the TBS808 at 8A and 25°C?

The TBS808 has a maximum forward voltage drop of 1.05 V at 8A and 25°C, per the Electrical Specifications table. The typical value is 0.97 V under the same conditions. This parameter is measured per diode in the bridge, and total conduction loss must account for two diodes conducting in series during each half-cycle.

Can the TBS808 be used as a direct replacement for the TBS806 or TBS810?

No - the TBS808 is not a direct replacement for TBS806 (600V) or TBS810 (1000V), as their V_RRM ratings differ. Substitution requires verifying that the 800V rating meets the application's reverse voltage stress margin. All three share identical package, pinout, thermal specs, and electrical characteristics except V_RRM, VR(RMS), and associated reverse leakage curves.