Taiwan Semiconductor Corporation HS3KB

Overview

HS3KB from Taiwan Semiconductor is a 3A, 800V repetitive peak reverse voltage (V_RRM) surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring 1.7V max forward voltage at 3A, 75ns reverse recovery time, and 50pF junction capacitance - designed for high-efficiency AC/DC conversion in compact power adapters.

For engineers reviewing the HS3KB datasheet, HS3KB pinout, HS3KB application, or HS3KB equivalent, key selection criteria include V_RRM = 800V, I_F = 3A, t_rr = 75ns, thermal resistance R_θJA = 60°C/W, and SMB package compatibility with automated SMT assembly lines.

Technical Context

The HS3KB is a single-die, glass-passivated, fast-recovery rectifier optimized for switching-mode power supplies operating at frequencies up to several hundred kHz. Its 75ns reverse recovery time and low 50pF junction capacitance minimize switching losses and EMI generation during turn-off transitions.

Rated for continuous forward current of 3A and surge current of 100A (8.3ms half-sine), it operates across -55°C to +150°C junction temperature range with moisture sensitivity level 1 per J-STD-020 - enabling robust performance in thermally constrained consumer and industrial power stages.

Key Specifications

Pinout & Package

Package: DO-214AA (SMB) - surface-mount, low-profile (2.7mm height), matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance; polarity indicated by cathode band.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage fast rectifier applications.

Compared with STTH3R08 and MUR308, the HS3KB balances mid-range t_rr and V_F with superior moisture resilience (MSL 1) and halogen-free compliance - making it ideal for cost-sensitive, high-volume consumer power supplies requiring zero bake-time and green material certification.

Availability

HS3KB is available at Aetrix Electronics and suitable for adapter power supplies, monitor internal PSUs, TV backlight drivers, and industrial control modules requiring stable component supply across multi-year production cycles.

Supply support for HS3KB 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs for industrial and consumer markets.

The HS3KB belongs to TSC's HS3x series of high-efficiency fast recovery rectifiers - engineered specifically for space-constrained, high-frequency AC/DC conversion in energy-efficient consumer electronics power supplies.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) of the HS3KB?

The HS3KB has a V_RRM rating of 800 V, verified per Taiwan Semiconductor's L2102 datasheet. This value is fixed for the HS3KB variant and distinguishes it from other members of the HS3x family (e.g., HS3AB = 50V, HS3MB = 1000V). The 800V rating ensures safe operation with 264V_AC mains input plus transient margin. HS3KB must not be substituted with lower-V_RRM variants in line-voltage rectification.

Does the HS3KB support automated SMT placement?

Yes, the HS3KB uses a DO-214AA (SMB) package with matte tin-plated leads that meet J-STD-002 solderability requirements and is explicitly rated for automated placement per its datasheet features. Its low-profile construction and MSL 1 rating eliminate pre-bake steps, enabling direct use in high-speed pick-and-place lines. HS3KB's marking code "HS3KB" and cathode band provide unambiguous orientation for vision-guided placement systems.

What is the junction-to-ambient thermal resistance (R_θJA) of the HS3KB?

The HS3KB has a typical R_θJA of 60°C/W when mounted on a standard 1-in² 1-oz copper pad, as specified in the Thermal Performance section of the L2102 datasheet. This value assumes no additional thermal vias or heatsinking. At 3A continuous current, this results in ~110°C junction rise above ambient - well within the +150°C T_JMAX limit if ambient stays below +40°C. HS3KB's R_θJA is consistent across the HS3x series due to identical SMB packaging.

Is the HS3KB halogen-free and RoHS compliant?

Yes, the HS3KB is both RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the FEATURES section of the L2102 datasheet. The molding compound contains no brominated flame retardants or chlorine-based additives, and lead content is below 1000 ppm. This makes HS3KB suitable for export to EU, Japan, and China RoHS-regulated markets. HS3KB's compliance documentation is available upon request from Taiwan Semiconductor.

What is the reverse recovery time (t_rr) of the HS3KB and how is it measured?

The HS3KB has a maximum reverse recovery time (t_rr) of 75 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, per the ELECTRICAL SPECIFICATIONS table in the L2102 datasheet. This test method aligns with JEDEC standards for fast recovery diodes. The 75 ns t_rr enables stable operation in 100–300 kHz switchers; HS3KB's t_rr is identical to HS3JB and HS3MB but slower than HS3GB (50 ns).