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Taiwan Semiconductor Corporation S4MH
- Part No.:
- S4MH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
S4MH.pdf
- Description:
- 4A, 1000V, STANDARD RECOVERY REC
- Quantity:
- Payment:
- Shipping:
Inventory:2,983
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Product details
Overview
S4MH from Taiwan Semiconductor is a surface-mount general-purpose silicon rectifier diode rated for 1000 V repetitive peak reverse voltage (VRRM), 4 A average forward current (IF), and 100 A non-repetitive surge current (IFSM). It features glass passivated junction, low forward voltage drop (≤1.15 V at 4 A), and AEC-Q101 qualification for automotive use in snubber circuits and DC-DC converters.
For engineers reviewing the S4MH datasheet, S4MH pinout, S4MH application, or S4MH equivalent, key selection considerations include its DO-214AB (SMC) package, 1500 ns reverse recovery time, 60 pF junction capacitance, 13 °C/W junction-to-lead thermal resistance, and suitability for high-surge, high-voltage automotive and industrial power conversion.
Technical Context
The S4MH operates as a single-die, unidirectional silicon rectifier with a glass-passivated PN junction optimized for high-voltage blocking and fast transient response. Its 1000 V VRRM rating enables use in primary-side rectification of offline SMPS and automotive battery-supplied systems up to 700 V RMS.
Thermal performance is defined by RθJL = 13 °C/W and RθJA = 47 °C/W, supporting 4 A continuous conduction with appropriate PCB copper area. Reverse recovery time (trr = 1500 ns) and junction capacitance (CJ = 60 pF) reflect standard soft-recovery characteristics suitable for snubbing and moderate-frequency rectification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports rectification in 700 VRMS AC line inputs or 1000 V DC bus applications |
| IF | 4 A - continuous average forward current at TL ≤ 95 °C on 1-inch² copper pad |
| IFSM | 100 A - withstands 8.3 ms half-sine surge, enabling robustness against inrush and fault currents |
| VF | ≤1.15 V @ 4 A, 25 °C - minimizes conduction loss and self-heating in high-current paths |
| trr | 1500 ns - limits switching loss and EMI in <100 kHz rectifier stages |
| RθJL | 13 °C/W - allows direct thermal transfer to PCB ground plane or heatsink via cathode lead |
| Junction Temp | -55 to +150 °C - supports operation in under-hood automotive environments and industrial enclosures |
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 | Forward current entry point | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node) |
| Cathode | Forward current exit / reverse-blocking terminal | Connected to output rail or filter capacitor; serves as primary thermal path to PCB |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and UHAST |
| Glass passivated junction | Enhances moisture resistance and long-term stability of reverse leakage (IR ≤ 10 µA @ 25 °C) |
| Low VF and high IFSM | Reduces power loss while maintaining surge immunity in compact layouts |
| DO-214AB (SMC) package | Enables automated pick-and-place assembly and achieves >4 mm creepage/clearance at 1000 V |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU for environmentally constrained designs |
Applications
| DC–DC Converter Primary Rectification | Automotive LED Headlamp Driver |
|---|---|
Use Scenario: High-voltage flyback or forward converter rectifying 400–800 V DC bus in onboard chargers or DC/DC modules. IC Role / Device Role / Timing Role: Unidirectional power switch converting switched AC to regulated DC output. Use Value: 1000 V VRRM ensures margin over 800 V transients; 100 A IFSM handles startup surges without derating. | Use Scenario: Constant-current LED driver in automotive headlamps where input varies from 9–16 V battery to 60 V load dump. IC Role / Device Role / Timing Role: Snubber diode clamping inductive kickback from buck/boost controller MOSFETs. Use Value: 1500 ns trr and low CJ suppress voltage spikes without oscillation; AEC-Q101 ensures field reliability. |
| Industrial AC Input Rectification | Snubber Network in Motor Drives |
Use Scenario: Bridge rectifier leg in 3-phase 400 V AC input stage of variable frequency drives or UPS systems. IC Role / Device Role / Timing Role: High-voltage, high-current rectifier handling line-frequency conduction. Use Value: 4 A IF and -55 to +150 °C operating range support continuous duty in sealed enclosures with ambient up to 85 °C. | Use Scenario: RC snubber across IGBT collector-emitter in 10–30 kW motor inverters. IC Role / Device Role / Timing Role: Fast-recovery clamp diode absorbing turn-off energy. Use Value: 13 °C/W RθJL enables direct thermal coupling to heatsink; glass passivation prevents leakage drift under humidity stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-4EWH10 | Same DO-214AB package, 4 A / 1000 V, but trr = 2000 ns and VF = 1.25 V max | Higher VF increases conduction loss; longer trr raises switching loss in >50 kHz designs | Prefer S4MH when lower VF or faster recovery is required in thermally constrained layouts |
| ON Semiconductor MUR4100 | DO-201AD package (axial), 4 A / 1000 V, trr = 75 ns (ultrafast), VF = 1.7 V max | Not surface-mount; incompatible with automated assembly; higher VF offsets ultrafast benefit | Choose S4MH for SMT compatibility, AEC-Q101 compliance, and balanced VF/trr trade-off |
Compared with VS-4EWH10 and MUR4100, the S4MH delivers superior thermal resistance (13 °C/W vs ≥25 °C/W), tighter VF spec (≤1.15 V), and automotive qualification-making it optimal for space-constrained, high-reliability SMT power supplies requiring stable surge handling and low conduction loss.
Availability
S4MH is available at Aetrix Electronics and suitable for automotive lighting, industrial DC-DC converters, and snubber networks requiring stable component supply, AEC-Q101 validation, and consistent DO-214AB packaging.
Supply support for S4MH 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.
The S4MH belongs to TSC's S4xH series of AEC-Q101-qualified surface-mount rectifiers designed specifically for automotive and industrial power conversion where high-voltage blocking, surge resilience, and automated assembly are mandatory.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for the S4MH?
The S4MH has a maximum repetitive peak reverse voltage (VRRM) of 1000 V, verified per Taiwan Semiconductor's A2102 datasheet. This rating ensures reliable blocking capability in 700 VRMS AC line applications and 800–1000 V DC bus systems. The S4MH maintains this rating across its full operating junction temperature range of –55 °C to +150 °C.
Is the S4MH suitable for automotive applications?
Yes, the S4MH is AEC-Q101 qualified and explicitly listed for automotive applications in its official documentation. It meets rigorous stress tests including temperature cycling, high-temperature reverse bias (HTRB), and unbiased highly accelerated stress testing (UHAST). The S4MH is deployed in car lighting, engine control modules, and onboard chargers where reliability under vibration, thermal cycling, and humidity is critical.
What package type does the S4MH use, and what are its key mechanical attributes?
The S4MH uses the DO-214AB (SMC) surface-mount package. Key mechanical attributes include matte tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 flammability-rated molding compound, polarity indicated by cathode band, and a typical weight of 0.210 g. Its footprint supports automated placement and provides ≥4 mm creepage distance at 1000 V.
What is the forward voltage (VF) specification for the S4MH at rated current?
The S4MH has a maximum forward voltage (VF) of 1.15 V at 4 A forward current and 25 °C junction temperature, as specified in the electrical characteristics table. This value is measured under pulse conditions (PW = 0.3 ms) and represents worst-case conduction loss for thermal design. At 125 °C, VF decreases slightly due to negative temperature coefficient of silicon.
Does the S4MH have a specified reverse recovery time (trr)?
Yes, the S4MH has a typical reverse recovery time (trr) of 1500 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This value is confirmed in the "ELECTRICAL SPECIFICATIONS" section of the A2102 datasheet and reflects its standard recovery behavior-suitable for line-frequency and moderate-switching-frequency rectification, but not ultrafast switching topologies.
S4MH 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 150°C
S4MH FAQ
1.How can I place an order for S4MH through Aetrix?
Please submit a Request for Quotation (RFQ) for S4MH 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 S4MH reliable?
The price and inventory of S4MH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S4MH is usually 5 days.
3.What payment methods are accepted for S4MH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S4MH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S4MH?
S4MH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S4MH 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 S4MH?
For technical support, including S4MH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S4MH requirements.
6.How does Aetrix verify that S4MH is sourced from the original manufacturer or authorized distributors?
All S4MH 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 S4MH meets industry standards.
7.What is the process for return or replacement of S4MH?
All S4MH units undergo pre-shipment inspection (PSI). If there is an issue with S4MH, 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 S4MH part is unused and in its original packaging.
Return procedure for S4MH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
S4MH Tags
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