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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation S12MC R7G

Name: S12MC R7G
Brand: Taiwan Semiconductor Corporation
SKU: S12MC R7G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S12MC R7G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AB, SMC

Datasheet:: S12MC R7G.pdf

Description:: DIODE GEN PURP 1KV 12A DO214AB

Quantity:: RFQ Add To RFQ list

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Inventory:2,634

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Product details

Overview

S12MC R7G from Taiwan Semiconductor is a 12A, 1000V surface-mount silicon rectifier diode in DO-214AB (SMC) package, featuring glass-passivated junction, low forward voltage drop (≤1.1 V at 12 A), and high surge capability (300 A, 8.3 ms). It serves as the primary output rectifier in high-efficiency AC/DC converters for industrial power supplies.

For engineers reviewing the S12MC R7G datasheet, S12MC R7G pinout, S12MC R7G application, or S12MC R7G equivalent, key selection criteria include peak reverse voltage rating (1000 V), thermal resistance (9 °C/W junction-to-lead), moisture sensitivity level (J-STD-020 Level 1), RoHS/halogen-free compliance, and SMC package compatibility with automated placement.

Technical Context

The S12MC R7G is a single-die, standard recovery rectifier optimized for switching-mode power conversion. Its 1000 V V_RRM supports universal-input offline designs, while the 300 A I_FSM enables robust handling of transient surges during startup or line faults.

Thermally, it delivers R_θJL = 9 °C/W and R_θJA = 44 °C/W, enabling reliable operation up to T_J = 150 °C. The device exhibits low leakage (≤1 µA at 25 °C, ≤250 µA at 125 °C) and junction capacitance of 78 pF at 4 V reverse bias - critical for EMI control in high-frequency SMPS topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - supports full-range 85–265 VAC input with margin for line transients in offline SMPS
I_F	12 A continuous average forward current - suitable for 150–200 W output stages without forced air
I_FSM	300 A (8.3 ms half-sine) - withstands inrush surges in bulk-capacitor charging scenarios
V_F	≤1.1 V at 12 A, 25 °C - reduces conduction loss and improves efficiency vs. higher-V_F alternatives
R_θJL	9 °C/W - enables direct thermal coupling to PCB copper pour for effective heat extraction
C_J	78 pF at 4 V - limits high-frequency displacement current and aids EMI filter design
T_J max	150 °C - allows operation in sealed enclosures or high-ambient industrial environments

Pinout & Package

DO-214AB (SMC) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance; UL 94V-0 molding compound; weight ≈ 0.270 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Input terminal for forward conduction path	Connected to transformer secondary or switch node; must handle full load current and surge energy
Cathode	Output terminal for forward conduction path	Connected to output capacitor and load; polarity marked by visible band on body

Key Features

Feature	Design Value
Glass-passivated junction	Enhances long-term reliability under humidity and thermal cycling; eliminates need for conformal coating in moderate-environment designs
Moisture sensitivity level 1	Zero bake requirement before reflow; compatible with standard SMT assembly lines without dry-pack handling
RoHS and halogen-free	Meets IEC 61249-2-21 and EU RoHS directives; supports green manufacturing and end-of-life recycling compliance
High I_FSM/I_F ratio (25:1)	Provides exceptional surge margin for unregulated or lightly loaded conditions without derating

Applications

Industrial SMPS Rectification	LED Driver Output Stage
Use Scenario: Primary output rectification in 100–200 W open-frame industrial power supplies operating across -25°C to +70°C ambient. IC Role / Device Role / Timing Role: Power rectifier converting high-frequency transformer secondary AC to DC bus; operates in discontinuous/continuous conduction mode. Use Value: 1000 V V_RRM ensures safety margin against reflected spikes; 9 °C/W R_θJL enables stable thermal performance on 2 oz copper PCBs.	Use Scenario: Secondary-side rectification in constant-current LED drivers for street lighting and high-bay fixtures. IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated DC to LED strings; subjected to repetitive thermal cycling. Use Value: Low 1.1 V V_F minimizes power loss and heatsink requirements; halogen-free construction meets outdoor environmental standards.
AC-DC Adapter Output	DC-DC Converter Input Protection
Use Scenario: Output rectifier in compact 65 W laptop adapters with tight thermal constraints and high-volume SMT assembly. IC Role / Device Role / Timing Role: High-current freewheeling path during flyback transformer reset; exposed to high dv/dt stress. Use Value: Glass passivation prevents leakage degradation over 5+ year field life; J-STD-020 Level 1 eliminates moisture-related popcorning risk.	Use Scenario: Reverse-polarity and surge protection at input of isolated 48 V–12 V DC-DC modules in telecom infrastructure. IC Role / Device Role / Timing Role: Clamp diode absorbing negative transients and blocking reverse feed; activated only during fault events. Use Value: 300 A I_FSM handles lightning-induced surges per IEC 61000-4-5; 150 °C T_J max sustains operation during sustained overvoltage.

Industrial SMPS Rectification

LED Driver Output Stage

Use Scenario: Primary output rectification in 100–200 W open-frame industrial power supplies operating across -25°C to +70°C ambient.

IC Role / Device Role / Timing Role: Power rectifier converting high-frequency transformer secondary AC to DC bus; operates in discontinuous/continuous conduction mode.

Use Value: 1000 V V_RRM ensures safety margin against reflected spikes; 9 °C/W R_θJL enables stable thermal performance on 2 oz copper PCBs.

Use Scenario: Secondary-side rectification in constant-current LED drivers for street lighting and high-bay fixtures.

IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated DC to LED strings; subjected to repetitive thermal cycling.

Use Value: Low 1.1 V V_F minimizes power loss and heatsink requirements; halogen-free construction meets outdoor environmental standards.

AC-DC Adapter Output

DC-DC Converter Input Protection

Use Scenario: Output rectifier in compact 65 W laptop adapters with tight thermal constraints and high-volume SMT assembly.

IC Role / Device Role / Timing Role: High-current freewheeling path during flyback transformer reset; exposed to high dv/dt stress.

Use Value: Glass passivation prevents leakage degradation over 5+ year field life; J-STD-020 Level 1 eliminates moisture-related popcorning risk.

Use Scenario: Reverse-polarity and surge protection at input of isolated 48 V–12 V DC-DC modules in telecom infrastructure.

IC Role / Device Role / Timing Role: Clamp diode absorbing negative transients and blocking reverse feed; activated only during fault events.

Use Value: 300 A I_FSM handles lightning-induced surges per IEC 61000-4-5; 150 °C T_J max sustains operation during sustained overvoltage.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-12EWH10	Same 12 A / 1000 V rating; R_θJL = 10 °C/W; VF = 1.15 V (typ)	Higher V_F increases conduction loss by ~5% at full load; identical SMC footprint	Select when sourcing diversification is required and 0.05 V V_F penalty is acceptable for thermal margin
ON Semiconductor MUR1210CT	12 A / 1000 V; ultrafast recovery (t_rr = 75 ns); dual common-cathode configuration	Lower switching loss in PFC stages but higher cost; requires layout adaptation for single-diode use	Prefer for high-frequency PFC or synchronous rectification where fast recovery matters more than cost

Compared with VS-12EWH10 and MUR1210CT, the S12MC R7G offers the lowest forward voltage and best thermal resistance in its class, making it optimal for thermally constrained, cost-sensitive industrial SMPS where standard recovery speed suffices.

Availability

S12MC R7G is available at Aetrix Electronics and suitable for industrial SMPS rectification, LED driver output stages, AC-DC adapter output circuits, and DC-DC converter input protection requiring stable component supply and long-term manufacturability.

Supply support for S12MC 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 rectifiers, TVS diodes, MOSFETs, and bipolar transistors.

The S12MC R7G belongs to TSC's S12x series of high-current surface-mount rectifiers, engineered specifically for high-efficiency, high-reliability AC/DC and DC/DC power conversion in industrial and commercial equipment.

FAQ

What is the maximum junction temperature rating for the S12MC R7G?

The S12MC R7G has a maximum junction temperature (T_J) of +150 °C, verified per absolute maximum ratings in the official TSC datasheet revision D2102. This rating allows the S12MC R7G to operate reliably in sealed enclosures or high-ambient environments such as industrial control cabinets. Derating curves confirm usable current capacity down to 0 A at 150 °C ambient when mounted on standard FR-4 with minimal copper.

Does the S12MC R7G meet RoHS and halogen-free requirements?

Yes, the S12MC R7G is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the TSC product documentation (Version D2102). The device uses halogen-free molding compound and matte tin-plated leads, supporting environmental compliance for export to EU, China, and other regulated markets. This applies directly to the S12MC R7G and all variants in the S12GC–S12MC family.

What is the moisture sensitivity level (MSL) of the S12MC R7G?

The S12MC R7G is rated MSL Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30 °C/60% RH and requires no baking prior to reflow soldering. This MSL Level 1 classification simplifies SMT line integration and eliminates dry-pack handling for the S12MC R7G - a key advantage over higher-MSL alternatives that demand strict floor-life tracking.

How does the forward voltage of the S12MC R7G compare to similar 12A/1000V rectifiers?

The S12MC R7G specifies a maximum forward voltage (V_F) of 1.1 V at 12 A and 25 °C, which is among the lowest in its class. For example, the Vishay VS-12EWH10 specifies 1.15 V (typ), and ON Semiconductor's MUR1210CT is rated at 1.2 V (max). This 50–100 mV advantage directly reduces conduction loss and thermal stress in the S12MC R7G during continuous operation.

Is the S12MC R7G pin-compatible with other devices in the S12x series?

Yes, the S12MC R7G shares identical DO-214AB (SMC) package dimensions, pinout, and thermal pad layout with all members of the S12GC–S12MC family (e.g., S12GC, S12JC, S12KC). This allows direct board-level substitution based on required V_RRM - for instance, replacing S12KC (800 V) with S12MC R7G (1000 V) requires no PCB change, provided layout accommodates the same SMC footprint and thermal relief.

S12MC R7G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AB, SMC

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 1000 V

Current - Average Rectified (Io):: 12A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 12 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 µA @ 1000 V

Capacitance @ Vr, F:: 78pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AB (SMC)

Operating Temperature - Junction:: -55°C ~ 150°C

S12MC R7G FAQ

1.How can I place an order for S12MC R7G through Aetrix?

Please submit a Request for Quotation (RFQ) for S12MC R7G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for S12MC R7G reliable?

The price and inventory of S12MC R7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S12MC R7G is usually 5 days.

3.What payment methods are accepted for S12MC R7G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S12MC R7G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S12MC R7G?

S12MC R7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S12MC R7G order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for S12MC R7G?

For technical support, including S12MC R7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S12MC R7G requirements.

6.How does Aetrix verify that S12MC R7G is sourced from the original manufacturer or authorized distributors?

All S12MC R7G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that S12MC R7G meets industry standards.

7.What is the process for return or replacement of S12MC R7G?

All S12MC R7G units undergo pre-shipment inspection (PSI). If there is an issue with S12MC R7G, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The S12MC R7G part is unused and in its original packaging.

Return procedure for S12MC R7G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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