Taiwan Semiconductor Corporation S1KHR3G

Overview

S1KHR3G from Taiwan Semiconductor is a surface-mount general-purpose silicon rectifier diode with 800 V repetitive peak reverse voltage, 1 A average forward current, and DO-214AC (SMA) package. It features low forward voltage drop (≤1.1 V at 1 A, 25°C), 30 A non-repetitive surge current capability, and operates up to 175°C junction temperature - used in DC-DC converters and snubber circuits.

For engineers reviewing the S1KHR3G datasheet, S1KHR3G pinout, S1KHR3G application, or S1KHR3G equivalent, key selection criteria include VRRM=800 V, IF=1 A, trr=1500 ns, TJmax=175°C, and DO-214AC mechanical compatibility for automated placement in power conversion and lighting systems.

Technical Context

This single-die standard recovery rectifier uses glass-passivated junction technology for stable performance under thermal cycling and high-humidity conditions. Its 1500 ns reverse recovery time and 12 pF junction capacitance at 4 V bias reflect trade-offs optimized for cost-sensitive, medium-frequency switching applications rather than ultrafast or soft-recovery use cases.

The device supports J-STD-020 Level 1 moisture sensitivity and matte tin-plated leads compliant with J-STD-002 solderability requirements. Polarity is marked by a cathode band, and its UL 94V-0 molding compound ensures flame resistance in compact PCB layouts.

Key Specifications

Pinout & Package

Package: DO-214AC (SMA), surface-mount, single-anode/single-cathode configuration. Cathode indicated by molded band on body. Matte tin-plated leads, UL 94V-0 compliant epoxy body, weight ≈0.060 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR180 and VS-1N4007-M3/54, the S1KHR3G delivers optimal balance of cost, SMT manufacturability, and thermal robustness for 50–100 kHz industrial power supplies - without ultrafast timing penalties or through-hole constraints.

Availability

S1KHR3G is available at Aetrix Electronics and suitable for DC-DC converters, lighting drivers, and snubber circuits requiring stable component supply, consistent parametric performance, and full traceability across production lots.

Supply support for S1KHR3G 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 industrial, computing, and consumer markets since 1979.

The S1A–S1M series was designed as a standardized, high-yield family of general-purpose rectifiers targeting cost-sensitive, high-volume SMT power conversion - emphasizing reliability, JEDEC-compliant packaging, and broad voltage coverage (50–1000 V).

FAQ

What is the maximum junction temperature rating for S1KHR3G?

The S1KHR3G has a maximum junction temperature (TJ max) of +175°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This rating enables reliable operation in high-ambient environments such as enclosed LED drivers or industrial control modules. Derating curves show usable current capacity down to zero at 175°C, and the S1KHR3G maintains specified VF and IR performance within this full range.

Is S1KHR3G suitable for use in a 100 kHz flyback converter?

Yes, the S1KHR3G is suitable for 100 kHz flyback converters where conduction loss dominates and moderate reverse recovery is acceptable. With trr = 1500 ns and VF ≤ 1.1 V at 1 A, it delivers good efficiency in this range. However, for >150 kHz designs or where EMI reduction is critical, an ultrafast alternative like MUR180 may be preferred due to its significantly shorter trr.

Does S1KHR3G have RoHS and halogen-free compliance documentation?

Yes, the S1KHR3G is RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the Taiwan Semiconductor S2102 datasheet. The device carries no restricted substances above threshold limits and uses halogen-free molding compound - supporting environmental compliance for CE-marked and export-ready end products.

What is the marking code printed on the S1KHR3G package?

The S1KHR3G is marked with "S1K" on the device body, consistent with Taiwan Semiconductor's S1A–S1M series coding convention. The "K" denotes 800 V VRRM, and the "R3G" suffix in the ordering code indicates tape-and-reel packaging (7,500 pcs/reel) and green compound - all visible in the official marking diagram on page 5 of the S2102 datasheet.

How does the thermal resistance of S1KHR3G compare between S1K and S1M variants?

The S1KHR3G (S1K variant) has RθJL = 30°C/W and RθJA = 85°C/W, identical to the S1M variant and higher than S1A–S1J (RθJL = 27°C/W, RθJA = 75°C/W). This reflects increased thermal impedance due to higher-voltage die construction - requiring slightly larger copper pads or airflow in thermally demanding applications compared to lower-voltage S1x devices.