Taiwan Semiconductor Corporation S8MC R7G

Overview

S8MC R7G from Taiwan Semiconductor is an 8A, 1000V surface-mount silicon rectifier diode in DO-214AB (SMC) package, featuring glass-passivated junction, low forward voltage drop (max 0.985 V at 8 A), high surge capability (200 A @ 8.3 ms), and RoHS/halogen-free compliance. It serves as the primary output rectifier in high-voltage SMPS and AC/DC adapters.

For engineers reviewing the S8MC R7G datasheet, S8MC R7G pinout, S8MC R7G application, or S8MC R7G equivalent, key selection criteria include repetitive peak reverse voltage (1000 V), thermal resistance (R_θJL = 12.5 °C/W), moisture sensitivity level (MSL 1), cathode-band polarity marking, and tape-and-reel packaging (3,000 pcs).

Technical Context

This single-die standard recovery rectifier operates with a maximum junction temperature of 150 °C and supports continuous forward current up to 8 A at case temperature ≤ 75 °C. Its 1000 V V_RRM rating enables use in universal-input offline converters and high-voltage DC link applications.

The device exhibits low leakage (≤10 µA at 25 °C, ≤250 µA at 125 °C) and moderate junction capacitance (48 pF at 4 V), supporting stable switching behavior in 50–100 kHz SMPS topologies without excessive capacitive loading or reverse recovery oscillation.

Key Specifications

Pinout & Package

Package: DO-214AB (SMC), molded plastic case with matte tin-plated leads, UL 94V-0 rated compound, cathode indicated by band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH8S10FP, S8MC R7G offers SMT compatibility and lower assembly cost; versus VS-8EWH10, it trades slightly higher V_F for broader supply chain availability and proven field reliability in adapter applications.

Availability

S8MC R7G is available at Aetrix Electronics and suitable for switching mode power supplies, industrial AC/DC adapters, and LED driver secondary rectification requiring stable component supply across multi-year production cycles.

Supply support for S8MC R7G 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, specializing in power devices, rectifiers, and protection components since 1979.

The S8GC–S8MC series was designed specifically for high-reliability, high-voltage AC/DC conversion in cost-sensitive industrial and consumer power supplies, emphasizing robust surge handling and automated assembly compatibility.

FAQ

What is the maximum junction temperature rating for S8MC R7G?

The S8MC R7G has a maximum junction temperature (T_J) rating of +150 °C, verified per absolute maximum ratings table. This allows operation in high-ambient environments such as enclosed power supplies or industrial enclosures. Derating curves confirm usable forward current down to 0 A at 150 °C case temperature. Thermal design must maintain T_J ≤ 150 °C under worst-case load and ambient conditions to ensure reliability of the S8MC R7G.

Does S8MC R7G meet RoHS and halogen-free requirements?

Yes, the S8MC R7G is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the product features section. The molding compound contains no brominated flame retardants or chlorine-based additives. This certification applies to the full production lot and is verified through material declarations and third-party testing reports maintained by Taiwan Semiconductor for the S8MC R7G.

What does the 'R7G' suffix indicate in S8MC R7G?

The 'R7G' suffix in S8MC R7G denotes tape-and-reel packaging (R7 = reel, G = green compound per TSC internal coding). It confirms the device is supplied in 3,000-piece reels with matte tin-plated leads, meeting J-STD-002 solderability and J-STD-020 MSL Level 1 requirements. No electrical or thermal parameter differences exist between S8MC R7G and base S8MC - the suffix specifies only packaging and finish.

Can S8MC R7G replace S8KC in an existing design?

S8MC R7G can replace S8KC only if the circuit requires ≥800 V V_RRM margin - S8MC R7G offers 1000 V versus S8KC's 800 V. Electrical parameters (I_F, I_FSM, V_F) are identical across the S8GC–S8MC family. No layout change is needed since both use DO-214AB (SMC) package. However, verify system-level transient immunity margins before substitution in S8KC-based S8MC R7G designs.

What is the typical forward voltage of S8MC R7G at 8 A and 125 °C?

The datasheet specifies only V_F max = 0.985 V at 8 A and 25 °C; no typical value is provided at 125 °C. Based on silicon diode physics and thermal coefficient trends in the S8GC–S8MC family, V_F decreases ~2 mV/°C, yielding an estimated V_F ≈ 0.85–0.90 V at 8 A and 125 °C. For precise thermal modeling of the S8MC R7G, use the max 0.985 V at 25 °C and apply derating per the forward characteristics curve.