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

Taiwan Semiconductor Corporation S4M

Name: S4M
Brand: Taiwan Semiconductor Corporation
SKU: S4M
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S4M

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AB, SMC

Datasheet:: S4M.pdf

Description:: DIODE GEN PURP 1KV 4A DO214AB

Quantity:: RFQ Add To RFQ list

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Inventory:12,521

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Product details

Overview

S4M from Taiwan Semiconductor is a surface-mount general-purpose silicon rectifier diode rated for 1000 V repetitive peak reverse voltage (V_RRM), 4 A average forward current (I_F), and 100 A non-repetitive surge current (I_FSM). It features a DO-214AB (SMC) package, glass-passivated junction, and is used in high-voltage AC/DC conversion stages of offline SMPS and industrial power adapters.

For engineers reviewing the S4M datasheet, S4M pinout, S4M application, or S4M equivalent, key selection criteria include its 1000 V V_RRM, 1.15 V max forward voltage at 4 A, 1500 ns reverse recovery time, JESD201 Class 2 whisker resistance, and RoHS/halogen-free compliance - all critical for high-reliability, high-voltage rectification in compact layouts.

Technical Context

The S4M operates as a single-die, unidirectional silicon rectifier with a glass-passivated PN junction optimized for high-voltage blocking and low-conduction loss. Its thermal design supports 150 °C maximum junction temperature and delivers 13 °C/W junction-to-lead thermal resistance, enabling stable operation under sustained 4 A DC load with appropriate PCB copper area.

Electrical behavior is defined by a 1.15 V max forward voltage at 4 A and 25 °C, 10 µA max reverse leakage at 25 °C (rising to 250 µA at 125 °C), and 1500 ns reverse recovery time under standardized 0.5 A forward / 1.0 A reverse test conditions - confirming suitability for medium-frequency switching applications up to ~50 kHz.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - Blocks up to 1000 V repetitive reverse voltage, enabling use in 800 V DC bus or 600 V AC line-derived supplies.
I_F	4 A continuous - Supports average forward current up to 4 A with adequate heatsinking on PCB copper pour.
I_FSM	100 A (8.3 ms sine) - Withstands brief inrush/surge events common during AC input startup or capacitor charging.
V_F max	1.15 V @ 4 A, 25 °C - Limits conduction loss to ≤4.6 W at full load, reducing thermal stress in compact designs.
t_rr	1500 ns - Compatible with flyback and forward converter topologies operating below 50 kHz switching frequency.
T_J max	150 °C - Allows operation in high-ambient environments such as enclosed industrial power supplies.
R_θJL	13 °C/W - Enables efficient heat transfer from die to PCB pad, supporting thermal reliability without external heatsink.

Pinout & Package

Package: DO-214AB (SMC), surface-mount, molded plastic case with matte tin-plated leads; polarity indicated by cathode band; weight ≈ 0.210 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Lead 1)	Forward current entry point	Connected to AC input or transformer secondary side; must withstand full surge current and reverse voltage stress.
Cathode (Lead 2)	Forward current exit point	Connected to output filter capacitor or DC bus; marked by visible cathode band on body; carries full load current.

Key Features

Feature	Design Value
Glass-passivated junction	Enhances long-term reliability and moisture resistance in humid or thermally cycled environments.
DO-214AB (SMC) package	Provides high power density and mechanical robustness while supporting automated pick-and-place assembly.
JESD201 Class 2 whisker resistance	Prevents tin whisker growth under thermal stress, ensuring solder joint integrity over product lifetime.
RoHS & halogen-free compliance	Meets IEC 61249-2-21 and global environmental regulations for industrial and consumer end equipment.

Applications

Industrial SMPS Input Rectification	LED Driver Bulk Rectification
Use Scenario: Rectifying 277 VAC or 400 VDC intermediate bus in industrial switch-mode power supplies. IC Role / Device Role / Timing Role: Primary AC/DC conversion device handling full line current and transient surges. Use Value: 1000 V V_RRM provides 2× safety margin over 400 VDC bus, minimizing risk of catastrophic failure during overvoltage events.	Use Scenario: Converting rectified AC to bulk DC for constant-current LED drivers in streetlight or high-bay fixtures. IC Role / Device Role / Timing Role: High-voltage, high-surge-capability rectifier in bridge or single-phase configuration. Use Value: 100 A I_FSM safely absorbs inrush from large bulk capacitors, extending driver lifetime and reducing field failures.
AC-DC Adapter Output Stage	Offline Flyback Converter Input Bridge
Use Scenario: Secondary-side rectification in universal-input (90–264 VAC) wall adapters delivering 12–24 VDC. IC Role / Device Role / Timing Role: Low-loss, high-efficiency output rectifier replacing Schottky diodes where higher voltage rating is required. Use Value: 1.15 V V_F max at 4 A enables >85% efficiency at full load without active synchronous rectification.	Use Scenario: Full-wave bridge rectification feeding the primary winding of an offline flyback converter. IC Role / Device Role / Timing Role: High-reliability, high-V_RRM discrete rectifier in discrete bridge configuration. Use Value: 1500 ns t_rr ensures minimal switching loss and EMI generation when paired with 65 kHz flyback controllers.

Industrial SMPS Input Rectification

LED Driver Bulk Rectification

Use Scenario: Rectifying 277 VAC or 400 VDC intermediate bus in industrial switch-mode power supplies.

IC Role / Device Role / Timing Role: Primary AC/DC conversion device handling full line current and transient surges.

Use Value: 1000 V V_RRM provides 2× safety margin over 400 VDC bus, minimizing risk of catastrophic failure during overvoltage events.

Use Scenario: Converting rectified AC to bulk DC for constant-current LED drivers in streetlight or high-bay fixtures.

IC Role / Device Role / Timing Role: High-voltage, high-surge-capability rectifier in bridge or single-phase configuration.

Use Value: 100 A I_FSM safely absorbs inrush from large bulk capacitors, extending driver lifetime and reducing field failures.

AC-DC Adapter Output Stage

Offline Flyback Converter Input Bridge

Use Scenario: Secondary-side rectification in universal-input (90–264 VAC) wall adapters delivering 12–24 VDC.

IC Role / Device Role / Timing Role: Low-loss, high-efficiency output rectifier replacing Schottky diodes where higher voltage rating is required.

Use Value: 1.15 V V_F max at 4 A enables >85% efficiency at full load without active synchronous rectification.

Use Scenario: Full-wave bridge rectification feeding the primary winding of an offline flyback converter.

IC Role / Device Role / Timing Role: High-reliability, high-V_RRM discrete rectifier in discrete bridge configuration.

Use Value: 1500 ns t_rr ensures minimal switching loss and EMI generation when paired with 65 kHz flyback controllers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH4R010DJF	1000 V V_RRM, 4 A I_F, but faster t_rr = 75 ns; TO-277 package (smaller footprint than DO-214AB).	Better suited for high-frequency PFC or resonant converters requiring ultrafast recovery.	Select STTH4R010DJF only if t_rr < 100 ns is required and board layout accommodates TO-277 lead spacing.
ON Semi MUR4100	1000 V V_RRM, 4 A I_F, t_rr = 75 ns; DO-214AB package; higher V_F = 1.7 V typical at 4 A.	Higher conduction loss limits use in thermally constrained adapters or high-efficiency LED drivers.	Choose MUR4100 only if faster recovery is prioritized over thermal performance and efficiency.

Compared with STTH4R010DJF and MUR4100, the S4M offers the lowest forward voltage and highest surge robustness in DO-214AB, making it optimal for cost-sensitive, thermally demanding, medium-frequency rectification where 1500 ns t_rr is acceptable.

Availability

S4M is available at Aetrix Electronics and suitable for industrial SMPS, LED driver bulk rectification, and AC-DC adapter output stages requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for S4M 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 devices, and MOSFETs for industrial and consumer markets.

The S4M belongs to TSC's S4x series of general-purpose surface-mount rectifiers, designed specifically for high-voltage, high-surge, cost-optimized AC/DC front-end and bulk rectification in space-constrained power systems.

FAQ

What is the maximum junction temperature rating for the S4M?

The S4M has a maximum junction temperature (T_J) rating of +150 °C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet K2102. This allows reliable operation in enclosed industrial power supplies where ambient temperatures exceed 85 °C, provided thermal design meets R_θJL = 13 °C/W requirements. The S4M must not be operated beyond this limit to avoid permanent degradation.

Does the S4M have a specified reverse recovery time, and how is it measured?

Yes, the S4M has a reverse recovery time (t_rr) of 1500 ns, measured under standardized conditions: I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, per the electrical specifications section of the K2102 datasheet. This value reflects behavior in medium-frequency switching applications like 50–65 kHz flyback converters and confirms suitability for non-ultrafast rectification roles where EMI and switching loss trade-offs favor ruggedness over speed.

Is the S4M RoHS and halogen-free compliant?

Yes, the S4M is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the FEATURES section of the K2102 datasheet. This compliance applies to all manufacturing lots shipped under ordering code S4M, with no exemptions. The device uses matte tin-plated leads and green molding compound meeting UL 94V-0, satisfying environmental requirements for export to EU, Japan, and other regulated markets.

What is the marking code printed on the S4M device body?

The S4M device is marked with "S4M" on its body, as confirmed in the ABSOLUTE MAXIMUM RATINGS table and MARKING DIAGRAM section of the K2102 datasheet. This marking appears adjacent to the cathode band and is laser-etched or ink-printed for traceability. No additional date codes, factory identifiers, or suffixes are part of the base S4M marking per standard packaging.

Can the S4M replace the S4K or S4J in an existing design?

The S4M can replace S4K (800 V) or S4J (600 V) only if the circuit's peak reverse voltage requirement is ≤1000 V and thermal/mechanical constraints permit - since all share identical DO-214AB package, pinout, and thermal specs. However, the higher V_RRM increases junction capacitance slightly (60 pF at 4 V), which may affect EMI in high-frequency designs. Verify reverse leakage and t_rr impact before substitution in S4J/S4K-based layouts.

S4M Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AB, SMC

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

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

Current - Average Rectified (Io):: 4A

Voltage - Forward (Vf) (Max) @ If:: 1.15 V @ 4 A

Speed:: Standard Recovery >500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 1.5 µs

Current - Reverse Leakage @ Vr:: 10 µA @ 1000 V

Capacitance @ Vr, F:: 60pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

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

S4M FAQ

1.How can I place an order for S4M through Aetrix?

Please submit a Request for Quotation (RFQ) for S4M 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 S4M reliable?

The price and inventory of S4M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S4M is usually 5 days.

3.What payment methods are accepted for S4M?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S4M transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S4M?

S4M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S4M 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 S4M?

For technical support, including S4M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S4M requirements.

6.How does Aetrix verify that S4M is sourced from the original manufacturer or authorized distributors?

All S4M 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 S4M meets industry standards.

7.What is the process for return or replacement of S4M?

All S4M units undergo pre-shipment inspection (PSI). If there is an issue with S4M, 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 S4M part is unused and in its original packaging.

Return procedure for S4M:

1.Submit a request within 90 days.

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

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