Taiwan Semiconductor Corporation SK36B

Overview

SK36B from Taiwan Semiconductor is a 3A, 60V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, designed for high-efficiency DC/DC conversion with low forward voltage (0.85 V max at 3 A, 25°C), high surge current capability (70 A), and junction temperature up to +150°C. It serves as the primary output rectifier in compact AC/DC adapters and offline SMPS.

For engineers reviewing the SK36B datasheet, SK36B pinout, SK36B application, or SK36B equivalent, key selection criteria include its 60 V repetitive peak reverse voltage, 0.85 V forward voltage ceiling, 10,000 V/μs dV/dt rating, moisture sensitivity level 1 compliance, and cathode-band polarity marking - all critical for thermal reliability and layout robustness in high-density power stages.

Technical Context

The SK36B operates as a single-die, unidirectional Schottky rectifier optimized for low-loss switching applications. Its 60 V V_RRM and 42 V RMS reverse voltage rating support universal-input offline converters, while its 70 A IFSM enables handling of transient surges without derating in 60 Hz line-synchronized designs.

Thermally, it features R_θJL = 23°C/W and R_θJA = 63°C/W, enabling 3 A continuous conduction in standard SMB footprints without forced airflow. The device's 2 mA reverse leakage at 125°C and 60 V ensures stable operation under elevated ambient conditions typical in enclosed LED drivers and industrial adapters.

Key Specifications

Pinout & Package

DO-214AA (SMB) surface-mount package with molded plastic body (UL 94V-0), matte tin-plated leads, and cathode band polarity indicator. Weight: 0.100 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SK36B, VS-3EY60-M3/57T offers lower forward voltage for improved efficiency in warm environments, while SB360-E3/57T provides superior room-temperature leakage control - both require no PCB changes but differ in thermal and leakage trade-offs across operating conditions.

Availability

SK36B is available at Aetrix Electronics and suitable for AC/DC adapters, LED drivers, and industrial SMPS requiring stable component supply, JEDEC-compliant packaging, and RoHS/halogen-free compliance.

Supply support for SK36B 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 manufacturer specializing in discrete power semiconductors, including Schottky rectifiers, TVS diodes, and MOSFETs.

The SK3xB series targets cost-sensitive, high-volume power conversion applications where efficiency, reliability, and JEDEC-standard packaging are essential - especially in consumer and industrial off-line power supplies.

FAQ

What is the maximum junction temperature rating for the SK36B?

The SK36B has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table in the official TSC datasheet (P2212). This allows sustained 3 A operation in ambient temperatures up to +85°C when mounted on ≥1 cm² of 2-oz copper with thermal vias. The SK36B must not exceed this limit to ensure long-term reliability and avoid parametric shift.

Does the SK36B have a cathode band marking, and how is polarity identified?

Yes, the SK36B uses a visible cathode band on the molded plastic body to indicate polarity, consistent with DO-214AA (SMB) industry convention. The banded end is the cathode terminal, and the opposite end is the anode. This marking is shown in the official TSC package outline drawing (HQ2SD07-DO214SMB-035 REV A) and confirmed in mechanical data section of the SK32B–SK320B datasheet.

What is the forward voltage specification for the SK36B at rated current and temperature?

The SK36B has a maximum forward voltage (V_F) of 0.85 V at I_F = 3 A and T_J = 25°C, as specified in the Electrical Specifications table (page 2, P2212). This value is measured under pulse test conditions (PW = 0.3 ms), and actual V_F increases with junction temperature - e.g., ~0.72 V at 100°C per typical forward characteristics curve (Fig.8).

Is the SK36B compliant with RoHS and halogen-free standards?

Yes, the SK36B is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the FEATURES section of the TSC SK32B–SK320B datasheet (P2212, page 1). The molding compound contains no brominated flame retardants or chlorine-based additives, and lead content is below 1000 ppm threshold for all homogeneous materials.

What is the surge current rating for the SK36B, and under what waveform is it defined?

The SK36B is rated for a non-repetitive peak forward surge current (I_FSM) of 70 A, defined for an 8.3 ms single half-sine wave superimposed on rated DC load, per Absolute Maximum Ratings table (page 1, P2212). This rating is validated per JEDEC JESD22-A112 and applies to line-frequency inrush events - not repetitive switching transients.