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

Taiwan Semiconductor Corporation SR804 B0G

Name: SR804 B0G
Brand: Taiwan Semiconductor Corporation
SKU: SR804 B0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SR804 B0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: SR804 B0G.pdf

Description:: DIODE SCHOTTKY 40V 8A DO201AD

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Product details

Overview

SR804 B0G from Taiwan Semiconductor is an AEC-Q101-qualified 8A, 40V Schottky barrier rectifier in DO-201AD package, featuring 0.55V forward voltage at 8A/25°C, 150A surge capability, and guard ring overvoltage protection. It is used in automotive-grade DC-DC converters and industrial switching power supplies where low conduction loss and high reliability are required.

For engineers reviewing the SR804 B0G datasheet, SR804 B0G pinout, SR804 B0G application, or SR804 B0G equivalent, key selection criteria include its 40V V_RRM, 125°C max junction temperature, DO-201AD mechanical outline, and AEC-Q101 qualification status for automotive use.

Technical Context

This single-die Schottky rectifier operates with a low forward voltage drop to minimize conduction losses in high-frequency switching topologies. Its guard ring structure enhances ruggedness against transient overvoltage events, and the pure tin-plated leads meet J-STD-002 solderability standards.

The device supports continuous 8A average forward current with 40°C/W junction-to-ambient thermal resistance. It delivers 500µA maximum reverse leakage at 25°C and 15mA at 100°C under rated 40V reverse bias, enabling stable operation across extended temperature ranges.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in 36V nominal systems.
I_F	8 A - Continuous average forward current; defines steady-state power handling in SMPS output stages.
V_F @ 8A, 25°C	0.55 V - Low conduction loss reduces heat generation and improves system efficiency above 90%.
I_FSM	150 A - Non-repetitive surge rating; withstands inrush and fault currents in adapter and converter inputs.
T_J max	125 °C - Maximum junction temperature; enables operation in under-hood automotive environments.
R_θJA	40 °C/W - Thermal resistance from junction to ambient; determines heatsink requirement for 8A continuous load.
I_R @ 40V, 25°C	500 µA - Low reverse leakage preserves standby efficiency and prevents unintended discharge paths.

Pinout & Package

DO-201AD axial-leaded package with cathode band marking; body length 9.5mm, diameter 3.6mm, lead spacing 5.3mm; RoHS-compliant, halogen-free molding compound (UL 94V-0), pure tin-plated leads.

Pin/Terminal	Circuit Role	Design Meaning
Anode (lead without band)	Forward current entry point	Connected to lower-potential side (e.g., ground or return path) in rectification configuration.
Cathode (lead with band)	Forward current exit / reverse blocking terminal	Connected to positive output rail; blocks reverse current up to 40V; polarity must be observed for correct operation.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control modules and body electronics requiring stress-tested reliability.
Guard ring structure	Improves dv/dt immunity and prevents premature edge breakdown during voltage transients in noisy power rails.
Low V_F (0.55V)	Reduces forward power dissipation to ≤4.4W at 8A, lowering thermal design burden vs. standard PN rectifiers.
JESD201 Class 2 whisker resistance	Ensures long-term solder joint integrity in vibration-prone environments like automotive and industrial equipment.

Applications

Automotive DC-DC Converters	Industrial SMPS Output Stage
Use Scenario: Step-down conversion in 12V–48V vehicle networks powering infotainment and ADAS sensors. IC Role / Device Role / Timing Role: Output freewheeling rectifier in synchronous or asynchronous buck converters. Use Value: 0.55V V_F minimizes conduction loss at high load, supporting >92% efficiency while meeting AEC-Q101 reliability requirements.	Use Scenario: Secondary-side rectification in 24V/48V industrial power supplies for PLCs and motor drives. IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated DC output with minimal voltage drop. Use Value: 150A I_FSM handles startup surges; 125°C T_J max ensures stability in enclosed enclosures without forced air cooling.
AC-DC Adapter Output	Telecom Power Rectification
Use Scenario: Low-noise, high-efficiency output rectification in wall-mounted 5–20W adapters for IoT gateways. IC Role / Device Role / Timing Role: Main output rectifier replacing slower PN diodes to reduce EMI and improve light-load regulation. Use Value: Fast recovery and low capacitance (<100pF) suppress ringing, easing EMI filter design and reducing conducted emissions.	Use Scenario: -48V telecom power distribution boards requiring high-reliability, low-loss rectification. IC Role / Device Role / Timing Role: OR-ing diode or hold-up rectifier in redundant power feeds. Use Value: 500µA I_R at 25°C prevents battery drain during standby; DO-201AD form factor allows manual rework and automated placement.

Automotive DC-DC Converters

Industrial SMPS Output Stage

Use Scenario: Step-down conversion in 12V–48V vehicle networks powering infotainment and ADAS sensors.

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

Use Value: 0.55V V_F minimizes conduction loss at high load, supporting >92% efficiency while meeting AEC-Q101 reliability requirements.

Use Scenario: Secondary-side rectification in 24V/48V industrial power supplies for PLCs and motor drives.

IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated DC output with minimal voltage drop.

Use Value: 150A I_FSM handles startup surges; 125°C T_J max ensures stability in enclosed enclosures without forced air cooling.

AC-DC Adapter Output

Telecom Power Rectification

Use Scenario: Low-noise, high-efficiency output rectification in wall-mounted 5–20W adapters for IoT gateways.

IC Role / Device Role / Timing Role: Main output rectifier replacing slower PN diodes to reduce EMI and improve light-load regulation.

Use Value: Fast recovery and low capacitance (<100pF) suppress ringing, easing EMI filter design and reducing conducted emissions.

Use Scenario: -48V telecom power distribution boards requiring high-reliability, low-loss rectification.

IC Role / Device Role / Timing Role: OR-ing diode or hold-up rectifier in redundant power feeds.

Use Value: 500µA I_R at 25°C prevents battery drain during standby; DO-201AD form factor allows manual rework and automated placement.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-8EWH04FN-M3	Same 40V V_RRM, 8A I_F, but TO-277 surface-mount package; 0.52V V_F at 8A; AEC-Q101 qualified.	Requires PCB redesign for SMT assembly; better thermal performance on copper pads but no axial through-hole option.	Select when board space is constrained and reflow capability exists; not drop-in for DO-201AD footprint.
ON Semiconductor SB840-E3/54	40V V_RRM, 8A I_F, DO-201AD package, but not AEC-Q101 qualified; 0.57V V_F; 100µA I_R at 25°C.	Suitable for commercial/industrial use only; lacks automotive stress qualification and has higher leakage at elevated temperatures.	Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated.

Compared with VS-8EWH04FN-M3 and SB840-E3/54, SR804 B0G uniquely combines AEC-Q101 qualification, DO-201AD through-hole compatibility, and 0.55V forward voltage-making it optimal for automotive and serviceable industrial power supplies requiring field-replaceable axial components.

Availability

SR804 B0G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial switching power supplies, and telecom power rectification requiring stable component supply and long-term lifecycle support.

Supply support for SR804 B0G 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 automotive, industrial, and consumer markets since 1979.

The SR802–SR820 series was designed specifically for high-reliability, medium-current Schottky rectification in automotive and industrial power conversion, emphasizing AEC-Q101 compliance, low V_F, and robust surge capability.

FAQ

What is the peak repetitive reverse voltage rating of SR804 B0G?

The SR804 B0G has a peak repetitive reverse voltage (V_RRM) rating of 40 V. This value defines the maximum reverse-biased voltage the device can block continuously without breakdown. It is verified per JEDEC test conditions and applies across the full operating temperature range from –55°C to +125°C. The SR804 B0G must not be operated beyond this rating in any circuit configuration.

Is SR804 B0G qualified for automotive applications?

Yes, SR804 B0G is AEC-Q101 qualified, meaning it has passed stress tests for temperature cycling, humidity, high-temperature reverse bias, and mechanical shock required for automotive electronic components. This qualification covers the entire SR804 B0G production lot and is documented in Taiwan Semiconductor's official AEC-Q101 certificate. SR804 B0G is suitable for under-hood and cabin applications where reliability under harsh conditions is mandatory.

What is the forward voltage drop of SR804 B0G at rated current?

The SR804 B0G exhibits a typical forward voltage drop (V_F) of 0.55 V at 8 A and 25°C, measured with a 0.3 ms pulse width. At 100°C junction temperature, V_F decreases slightly due to semiconductor physics, remaining below 0.52 V. This low V_F directly reduces conduction losses and thermal load compared to standard PN rectifiers, improving overall system efficiency.

Does SR804 B0G have a guard ring structure?

Yes, SR804 B0G incorporates a guard ring design in its silicon die layout. This feature increases the critical rate of rise of off-state voltage (dv/dt) to 10,000 V/µs and improves edge termination robustness, preventing premature avalanche breakdown during fast voltage transients. The guard ring is integral to the device's ability to meet AEC-Q101 transient overload requirements and is confirmed in Taiwan Semiconductor's device cross-section analysis reports.

What packaging options are available for SR804 B0G?

SR804 B0G is supplied in DO-201AD package with 500 units per ammo box (B0G suffix). The "B0G" ordering code explicitly denotes the ammo box packing format; tape-and-reel (1,250 pcs) uses the base code SR804 without suffix or with "H" for AEC-Q101 variants. Lead finish is pure tin, compliant with J-STD-002, and the molding compound meets UL 94V-0 flammability rating.

SR804 B0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Bulk

Product Status:: Discontinued at Digi-Key

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 40 V

Current - Average Rectified (Io):: 8A

Voltage - Forward (Vf) (Max) @ If:: 550 mV @ 8 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 500 µA @ 40 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

Operating Temperature - Junction:: -55°C ~ 125°C

SR804 B0G FAQ

1.How can I place an order for SR804 B0G through Aetrix?

Please submit a Request for Quotation (RFQ) for SR804 B0G 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 SR804 B0G reliable?

The price and inventory of SR804 B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR804 B0G is usually 5 days.

3.What payment methods are accepted for SR804 B0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR804 B0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SR804 B0G?

SR804 B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SR804 B0G 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 SR804 B0G?

For technical support, including SR804 B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR804 B0G requirements.

6.How does Aetrix verify that SR804 B0G is sourced from the original manufacturer or authorized distributors?

All SR804 B0G 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 SR804 B0G meets industry standards.

7.What is the process for return or replacement of SR804 B0G?

All SR804 B0G units undergo pre-shipment inspection (PSI). If there is an issue with SR804 B0G, 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 SR804 B0G part is unused and in its original packaging.

Return procedure for SR804 B0G:

1.Submit a request within 90 days.

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

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