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

Taiwan Semiconductor Corporation S4BH

Name: S4BH
Brand: Taiwan Semiconductor Corporation
SKU: S4BH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S4BH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AB, SMC

Datasheet:: S4BH.pdf

Description:: 4A, 100V, STANDARD RECTIFIER

Quantity:: RFQ Add To RFQ list

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Inventory:4,900

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Product details

Overview

S4BH from Taiwan Semiconductor is a surface-mount silicon rectifier diode rated for 4 A average forward current and 100 V repetitive peak reverse voltage in a DO-214AB (SMC) package, featuring low forward voltage drop (≤1.15 V at 4 A, 25°C), high surge capability (100 A, 8.3 ms), and AEC-Q101 qualification for automotive use.

For engineers reviewing the S4BH datasheet, S4BH pinout, S4BH application, or S4BH equivalent, key selection considerations include its 100 V V_RRM, 13 °C/W junction-to-lead thermal resistance, 1500 ns reverse recovery time, moisture sensitivity level 1 rating, and suitability for DC-DC converters and automotive lighting circuits.

Technical Context

The S4BH is a single-die, standard recovery rectifier with glass-passivated junction and cathode-band polarity indication. Its 1500 ns reverse recovery time and 60 pF junction capacitance at 1 MHz/4 V define its switching behavior in mid-frequency power conversion.

Thermally, it delivers 47 °C/W junction-to-ambient resistance and supports continuous operation from –55°C to +150°C junction temperature, with lead terminations matte tin-plated per J-STD-002 and compliant with JESD 201 Class 2 whisker testing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum non-repetitive reverse voltage the device blocks without breakdown
I_F	4 A - Continuous average forward current under specified thermal conditions
I_FSM	100 A - Peak non-repetitive surge current survivable for 8.3 ms half-sine wave
V_F	≤1.15 V - Forward voltage drop at 4 A and 25°C, directly impacting conduction loss
t_rr	1500 ns - Reverse recovery time under IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A, limiting switching frequency
R_θJL	13 °C/W - Thermal resistance from junction to lead, critical for PCB copper pour design
Junction Temp	–55°C to +150°C - Operating range defining reliability in under-hood automotive environments

Pinout & Package

Package: DO-214AB (SMC), surface-mount, molded epoxy case meeting UL 94V-0, with cathode indicated by band. Weight ≈ 0.210 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unbanded end)	Forward current entry point	Connected to lower-potential side of rectified path; requires adequate trace width for 4 A continuous
Cathode (banded end)	Forward current exit / reverse blocking terminal	Connected to output rail or filter capacitor; polarity must match PCB silkscreen and layout

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per stress test requirements
Glass passivated junction	Enhances long-term stability and humidity resistance versus epoxy-passivated alternatives
Moisture sensitivity level 1	Enables direct placement without baking; eliminates pre-reflow handling overhead
Matte tin plated leads	Ensures solderability and intermetallic formation control per J-STD-002
Halogen-free construction	Complies with IEC 61249-2-21, supporting RoHS and environmental compliance programs

Applications

Automotive LED Headlamp Driver	Industrial DC-DC Buck Converter Output Stage
Use Scenario: Rectifying switched output in constant-current LED driver for vehicle headlamps operating in under-hood ambient up to 125°C. IC Role / Device Role / Timing Role: Output freewheeling rectifier in synchronous or asynchronous buck topology. Use Value: AEC-Q101 qualification and 150°C max junction temperature ensure functional safety compliance and lifetime reliability.	Use Scenario: Secondary-side rectification in isolated 24 V to 5 V industrial DC-DC converter powering PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional current path during transformer reset phase; handles 4 A continuous load current. Use Value: 13 °C/W R_θJL enables efficient heat transfer to copper pour, reducing thermal derating in enclosed enclosures.
Automotive Cabin Lighting Power Supply	Snubber Network in Relay/Contactor Drive Circuit
Use Scenario: Input rectification stage in 12 V AC/DC adapter powering interior LED map lights and dome lamps. IC Role / Device Role / Timing Role: Bridge or single-phase input rectifier converting transformer secondary AC to DC bus. Use Value: Low 1.15 V V_F minimizes conduction loss and self-heating at 4 A, improving efficiency in space-constrained modules.	Use Scenario: Voltage-clamping element across inductive coil of 12 V automotive relay to suppress turn-off voltage spikes. IC Role / Device Role / Timing Role: Transient energy dissipation path during coil de-energization. Use Value: 100 V V_RRM and 100 A I_FSM withstand repeated 60–100 V inductive kick events without degradation.

Automotive LED Headlamp Driver

Industrial DC-DC Buck Converter Output Stage

Use Scenario: Rectifying switched output in constant-current LED driver for vehicle headlamps operating in under-hood ambient up to 125°C.

IC Role / Device Role / Timing Role: Output freewheeling rectifier in synchronous or asynchronous buck topology.

Use Value: AEC-Q101 qualification and 150°C max junction temperature ensure functional safety compliance and lifetime reliability.

Use Scenario: Secondary-side rectification in isolated 24 V to 5 V industrial DC-DC converter powering PLC I/O modules.

IC Role / Device Role / Timing Role: Unidirectional current path during transformer reset phase; handles 4 A continuous load current.

Use Value: 13 °C/W R_θJL enables efficient heat transfer to copper pour, reducing thermal derating in enclosed enclosures.

Automotive Cabin Lighting Power Supply

Snubber Network in Relay/Contactor Drive Circuit

Use Scenario: Input rectification stage in 12 V AC/DC adapter powering interior LED map lights and dome lamps.

IC Role / Device Role / Timing Role: Bridge or single-phase input rectifier converting transformer secondary AC to DC bus.

Use Value: Low 1.15 V V_F minimizes conduction loss and self-heating at 4 A, improving efficiency in space-constrained modules.

Use Scenario: Voltage-clamping element across inductive coil of 12 V automotive relay to suppress turn-off voltage spikes.

IC Role / Device Role / Timing Role: Transient energy dissipation path during coil de-energization.

Use Value: 100 V V_RRM and 100 A I_FSM withstand repeated 60–100 V inductive kick events without degradation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH4L06S	600 V V_RRM, 4 A I_F, 75 ns t_rr, TO-277A package	Higher voltage rating but faster recovery; suited for higher-frequency flyback snubbers	Select when >100 V blocking or <200 ns t_rr required; not drop-in due to different package and pinout
ON Semi MUR420	200 V V_RRM, 4 A I_F, 75 ns t_rr, DO-201AD package	Ultrafast recovery; larger through-hole package limits automated assembly compatibility	Prefer for legacy through-hole designs needing faster switching; not suitable for SMC footprint replacement

Compared with STTH4L06S and MUR420, the S4BH offers optimized cost-performance balance for 100 V automotive rectification where standard recovery speed suffices, retains full SMC mount compatibility, and delivers AEC-Q101 assurance unavailable in generic alternatives.

Availability

S4BH is available at Aetrix Electronics and suitable for automotive lighting, DC-DC converters, and snubber networks requiring stable component supply, AEC-Q101 compliance, and surface-mount manufacturability.

Supply support for S4BH 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 global automotive, industrial, and consumer markets since 1979.

The S4BH belongs to TSC's AEC-Q101-qualified S4xH rectifier family, engineered specifically for robust, high-reliability power conversion in automotive subsystems and harsh-environment industrial equipment.

FAQ

What is the maximum repetitive peak reverse voltage rating for the S4BH?

The S4BH has a maximum repetitive peak reverse voltage (V_RRM) of 100 V, verified per Taiwan Semiconductor's A2102 datasheet. This rating defines the highest reverse-biased voltage the device can block continuously without avalanche breakdown. Exceeding 100 V risks irreversible junction failure. The S4BH is part of the S4xH series where 'B' denotes the 100 V variant, distinct from S4AH (50 V) and S4DH (200 V).

Is the S4BH suitable for automotive applications?

Yes, the S4BH is AEC-Q101 qualified per its official datasheet, confirming validation for automotive-grade temperature cycling, high-temperature reverse bias (HTRB), and mechanical shock. Its –55°C to +150°C junction temperature range, moisture sensitivity level 1, and halogen-free construction meet Tier-1 supplier requirements. The S4BH is explicitly listed in Taiwan Semiconductor's automotive application notes for LED headlamp drivers and cabin lighting systems.

What is the reverse recovery time (t_rr) of the S4BH and how is it measured?

The S4BH has a typical reverse recovery time (t_rr) of 1500 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, per the A2102 datasheet. This value reflects its standard recovery behavior-slower than ultrafast rectifiers but sufficient for ≤100 kHz switching topologies. Designers should verify t_rr-induced losses in their specific operating frequency and di/dt conditions using the S4BH's published recovery waveform in Figure 6.

Does the S4BH have a defined thermal resistance to ambient (R_θJA)?

Yes, the S4BH specifies a junction-to-ambient thermal resistance (R_θJA) of 47 °C/W under standard JEDEC test conditions (single-layer 1 in² copper pad). This value assumes no additional heatsinking and serves as a baseline for thermal modeling. For improved performance, designers should leverage its 13 °C/W R_θJL by connecting the cathode lead directly to large internal or external copper planes, as validated in Taiwan Semiconductor's thermal characterization data on page 2 of the A2102 datasheet.

What packaging and reel quantity is offered for the S4BH?

The S4BH is supplied in DO-214AB (SMC) package format on tape-and-reel, with 3,000 units per reel, as confirmed in the Ordering Information section of the A2102 datasheet. The marking code "S4B" appears on the cathode-banded surface, and the device uses green molding compound compliant with UL 94V-0. No alternate packaging (e.g., bulk or ammo pack) is listed for this orderable part number.

S4BH 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):: 100 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 @ 100 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

S4BH FAQ

1.How can I place an order for S4BH through Aetrix?

Please submit a Request for Quotation (RFQ) for S4BH 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 S4BH reliable?

The price and inventory of S4BH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S4BH is usually 5 days.

3.What payment methods are accepted for S4BH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S4BH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S4BH?

S4BH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S4BH 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 S4BH?

For technical support, including S4BH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S4BH requirements.

6.How does Aetrix verify that S4BH is sourced from the original manufacturer or authorized distributors?

All S4BH 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 S4BH meets industry standards.

7.What is the process for return or replacement of S4BH?

All S4BH units undergo pre-shipment inspection (PSI). If there is an issue with S4BH, 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 S4BH part is unused and in its original packaging.

Return procedure for S4BH:

1.Submit a request within 90 days.

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

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