Taiwan Semiconductor Corporation S15GLW

Overview

S15GLW from Taiwan Semiconductor is a 1.5A, 400V standard surface-mount silicon rectifier diode in SOD-123W package, designed for DC-DC conversion and switching-mode power supplies where compact size, high surge capability (50A IFSM), and low forward voltage (1.05V max at 1.5A/25°C) are critical.

For engineers reviewing the S15GLW datasheet, S15GLW pinout, S15GLW application, or S15GLW equivalent, this part supports high-efficiency power conversion in space-constrained industrial and consumer power modules with verified thermal resistance (R_θJL = 29°C/W) and J-STD-020 Level 1 moisture sensitivity.

Technical Context

The S15GLW is a single-die, unidirectional standard recovery rectifier optimized for medium-voltage switching applications. It features a rated repetitive peak reverse voltage (V_RRM) of 400 V, maximum average forward current (I_F) of 1.5 A, and junction temperature range from –55°C to +175°C - enabling operation in thermally demanding environments without derating below 125°C.

Its electrical behavior is defined by forward voltage drop (1.10 V max at 1.5 A/25°C), reverse leakage (≤1 µA at 25°C, ≤100 µA at 125°C), and junction capacitance (10 pF typical at 1 MHz/4 V), making it suitable for moderate-frequency (<100 kHz) rectification where low conduction loss and predictable reverse recovery are required.

Key Specifications

Pinout & Package

Package: SOD-123W - Surface-mount plastic case with matte tin-plated leads, UL 94V-0 molding compound, cathode band polarity marking, and 0.019 g mass. Compliant with JESD201 Class 2 whisker testing and J-STD-020 Level 1 moisture sensitivity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR150 and VS-1N5819HM3/85A, the S15GLW uniquely balances 400 V blocking, 1.5 A current, SMD compatibility, and thermal robustness - making it the only viable option among the three for compact, medium-voltage, high-surge industrial power supplies.

Availability

S15GLW is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and general-purpose rectification requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for S15GLW 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and AEC-Q200 qualified products.

The S15GLW belongs to TSC's S15xLW family of standard recovery rectifiers engineered for cost-sensitive, high-volume power conversion applications where reliability, thermal performance, and automated assembly compatibility are essential.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the S15GLW?

The S15GLW has a maximum repetitive peak reverse voltage (V_RRM) of 400 V, as specified in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version C2103). This value is fixed for the S15GLW variant and distinguishes it from other members of the S15xLW series such as S15DLW (200 V) and S15MLW (1000 V). The S15GLW must not be subjected to reverse voltages exceeding this rating under normal operating conditions.

Is the S15GLW a Schottky or standard PN-junction rectifier?

The S15GLW is a standard silicon PN-junction rectifier, not a Schottky diode. Its electrical specifications - including reverse recovery characteristics implied by the absence of trr data, forward voltage of 1.05–1.10 V, and 175°C maximum junction temperature - confirm standard recovery behavior. Schottky alternatives like VS-1N5819HM3/85A exhibit significantly lower V_F and zero reverse recovery but cannot support the 400 V rating required by the S15GLW.

What is the thermal resistance from junction to lead (R_θJL) for the S15GLW?

The junction-to-lead thermal resistance (R_θJL) for the S15GLW is 29°C/W, measured under JEDEC-standard conditions using a 5 mm × 5 mm copper pad test board. This value is critical for estimating temperature rise at the lead interface during conduction and informs solder joint reliability and PCB copper pour design. It is identical across the S15xLW family and confirmed in the Thermal Performance section of the Taiwan Semiconductor datasheet.

Can the S15GLW replace the S15DLW in a design?

No, the S15GLW cannot directly replace the S15DLW without circuit review because they differ in key voltage ratings: S15DLW has V_RRM = 200 V, while S15GLW is rated for 400 V. Substituting the higher-rated S15GLW may be acceptable if the original design operates well within its 200 V margin, but doing so does not improve surge immunity or thermal performance - both share identical I_F, I_FSM, package, and thermal metrics. Always verify reverse voltage stress margins before substitution.

What marking code appears on the S15GLW device body?

The S15GLW is marked with "15GLW" on its top surface, as documented in the Absolute Maximum Ratings table and Marking Diagram section of the Taiwan Semiconductor datasheet. This 5-character code - distinct from S15DLW ("15DLW") and S15MLW ("15MLW") - enables visual identification and traceability on assembled PCBs. The marking is accompanied by date and factory codes per standard SOD-123W layout.