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Taiwan Semiconductor Corporation SR004 R1G
- Part No.:
- SR004 R1G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
SR004 R1G.pdf
- Description:
- DIODE SCHOTTKY 40V 500MA DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,056
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Product details
Overview
SR004 R1G from Taiwan Semiconductor is a 40 V, 0.5 A Schottky barrier rectifier in DO-204AL (DO-41) package, featuring 0.55 V forward voltage at 0.5 A and 500 µA reverse leakage at 25°C, optimized for high-efficiency DC/DC converters and AC/DC adapters.
For engineers reviewing the SR004 R1G datasheet, SR004 R1G pinout, SR004 R1G application, or SR004 R1G equivalent, key selection criteria include its AEC-Q101-qualified variant availability, junction temperature rating up to +150°C, low thermal resistance (50°C/W), and guard-ring–enhanced overvoltage protection.
Technical Context
This discrete Schottky diode operates as a unidirectional power rectifier with single-die construction and cathode-band polarity marking. Its low VF and high IFSM (30 A surge) support high-frequency switching topologies where conduction loss and transient robustness are critical.
The device uses pure tin-plated leads compliant with J-STD-002, meets UL 94V-0 flammability, and incorporates a guard ring for improved avalanche ruggedness - enabling reliable operation in automotive-grade and industrial power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage; defines safe blocking capability in 36 V nominal systems |
| IF | 0.5 A - Continuous forward current rating; sets baseline thermal design for PCB trace width and copper area |
| VF @ 0.5A, 25°C | 0.55 V - Low conduction loss; reduces power dissipation to ≤275 mW at rated DC load |
| IR @ 40V, 25°C | 500 µA - Minimal leakage; preserves efficiency in standby and light-load conditions |
| IFSM (8.3 ms) | 30 A - Surge withstand capability; supports inrush current handling without failure |
| TJ max | +150°C - Extended junction temperature rating; enables operation in sealed or high-ambient environments |
| RθJA | 50°C/W - Thermal resistance from junction to ambient; informs heatsinking requirements on standard FR-4 |
Pinout & Package
DO-204AL (DO-41) axial-leaded package with cathode band indicating terminal polarity; lead finish is pure tin, solderable per J-STD-002; weight ≈ 0.330 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node or ground return) in buck/flyback configurations |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; ties to output rail or positive bus - determines voltage reference and grounding strategy |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances edge termination robustness, raising avalanche breakdown margin beyond VRRM rating |
| AEC-Q101 qualification option | Validated for automotive power modules requiring stress-tested reliability under temperature cycling and HTRB |
| Halogen-free molding compound | Complies with IEC 61249-2-21; eliminates corrosive halogen emissions during reflow or field failure |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under thermal/humidity stress - critical for long-life industrial deployments |
Applications
| Switching Mode Power Supply (SMPS) | USB-C PD Adapters |
|---|---|
Use Scenario: Secondary-side rectification in 30–65 W flyback converters powering laptops and monitors. IC Role / Device Role / Timing Role: Uncontrolled rectifier replacing synchronous MOSFETs where cost and simplicity outweigh efficiency gains. Use Value: 0.55 V VF minimizes conduction loss at 0.5 A output, supporting >88% efficiency without gate-drive complexity. | Use Scenario: Output rectification in compact 20–45 W USB-C power adapters with universal input (90–264 VAC). IC Role / Device Role / Timing Role: High-frequency freewheeling diode in quasi-resonant flyback topology operating at 65–130 kHz. Use Value: 30 A IFSM handles peak currents during startup and short-circuit events; DO-41 footprint eases layout in space-constrained designs. |
| Automotive Body Control Modules | Industrial DC/DC Converters |
Use Scenario: Reverse-polarity protection and load-dump clamping in 12 V auxiliary power rails for lighting and sensors. IC Role / Device Role / Timing Role: Bidirectional protection element leveraging guard ring and +150°C TJ rating for under-hood placement. Use Value: AEC-Q101 qualified variants ensure compliance with automotive qualification standards; low IR prevents thermal runaway during extended idle states. | Use Scenario: Input rectification in isolated 5–24 V input DC/DC modules used in programmable logic controllers and HMIs. IC Role / Device Role / Timing Role: Primary-side snubber diode and secondary-side freewheeling path in dual-active-bridge or forward converters. Use Value: 50°C/W RθJA allows direct mounting on metal-core PCBs without added heatsinks; RoHS + halogen-free ensures compliance in EU industrial equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB0440-TB-E3 (Vishay) | Same DO-41 package, 40 V VRRM, but VF = 0.52 V @ 0.5 A and IR = 200 µA @ 25°C - slightly tighter leakage spec | Preferred in battery-powered systems where microamp-level standby leakage impacts shelf life | Select SB0440-TB-E3 when ultra-low IR is prioritized over AEC-Q101 qualification |
| SS14 (ON Semiconductor) | DO-214AC (SMA) package, 40 V VRRM, VF = 0.5 V @ 0.5 A, IR = 500 µA @ 25°C - surface-mount, higher thermal mass | Suitable for automated SMT assembly; less suited for through-hole prototyping or high-vibration mechanical retention | Choose SS14 for volume production with pick-and-place lines; SR004 R1G remains optimal for manual assembly or legacy DO-41 tooling |
Compared with SB0440-TB-E3 and SS14, SR004 R1G offers AEC-Q101 qualification and axial-leaded mechanical stability - making it uniquely suitable for automotive replacement modules and industrial field-serviceable power supplies where lead integrity and qualification traceability are mandatory.
Availability
SR004 R1G is available at Aetrix Electronics and suitable for switching mode power supplies, USB-C adapters, and automotive body control modules requiring stable component supply across multi-year production cycles.
Supply support for SR004 R1G 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 industrial, computing, and automotive markets since 1979.
The SR002–SR010 series was designed specifically for cost-sensitive, high-reliability rectification in off-line and isolated DC/DC power stages - balancing performance, qualification, and manufacturability in axial-leaded form factors.
FAQ
What is the maximum junction temperature rating for SR004 R1G?
The SR004 R1G has a maximum junction temperature (TJ max) of +150°C, verified per absolute maximum ratings in the official TSC datasheet revision H2104. This rating applies to both standard and AEC-Q101–qualified versions and enables operation in high-ambient environments such as enclosed automotive ECUs or sealed industrial enclosures. Derating curves confirm usable current capacity down to 0.3 A at 125°C ambient with standard PCB layout.
Does SR004 R1G have AEC-Q101 qualification?
SR004 R1G itself is the base industrial-grade marking; however, the AEC-Q101–qualified version is designated SR004H R1G per TSC's ordering code table. The "H" suffix indicates full AEC-Q101 stress testing including HTGB, TC, and HTRB. No qualification data is assigned to the non-H suffix part, and SR004 R1G must not be assumed compliant for automotive use without verifying the H-suffix variant.
What does the "R1G" suffix mean in SR004 R1G?
The "R1G" suffix in SR004 R1G denotes green compound (halogen-free) molding material per IEC 61249-2-21 and RoHS-compliant packaging - confirmed in TSC's mechanical data section. It does not indicate tape-and-reel packaging (which uses "SR004" alone or "SR004H") nor AEC-Q101 status. The R1G marking appears on the device body alongside the SR004 code and date code.
What is the forward voltage of SR004 R1G at 100°C junction temperature?
Per TSC's electrical specifications table, SR004 R1G exhibits a typical forward voltage of ≤0.45 V at IF = 0.5 A and TJ = 100°C - derived from the VF vs. temperature curve (Fig.4) and confirmed by the note stating "SR002–SR004: IR = 10 mA @ TJ = 100°C", implying stable conduction behavior. This reduction from 0.55 V at 25°C reflects the negative temperature coefficient inherent to Schottky diodes.
Can SR004 R1G replace SR005 R1G in a 50 V design?
No - SR004 R1G has a VRRM of 40 V and is not rated for continuous operation at 50 V reverse bias. Substituting it for SR005 R1G (50 V VRRM) risks premature breakdown under transient overvoltage or line surges. TSC's absolute maximum ratings table explicitly assigns 40 V only to SR004. For 50 V systems, SR005 R1G or higher-rated variants must be used to maintain design margin and reliability.
SR004 R1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 500mA
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 500 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 40 V
- Capacitance @ Vr, F:
- 110pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 125°C
SR004 R1G FAQ
1.How can I place an order for SR004 R1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR004 R1G 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 SR004 R1G reliable?
The price and inventory of SR004 R1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR004 R1G is usually 5 days.
3.What payment methods are accepted for SR004 R1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR004 R1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR004 R1G?
SR004 R1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR004 R1G 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 SR004 R1G?
For technical support, including SR004 R1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR004 R1G requirements.
6.How does Aetrix verify that SR004 R1G is sourced from the original manufacturer or authorized distributors?
All SR004 R1G 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 SR004 R1G meets industry standards.
7.What is the process for return or replacement of SR004 R1G?
All SR004 R1G units undergo pre-shipment inspection (PSI). If there is an issue with SR004 R1G, 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 SR004 R1G part is unused and in its original packaging.
Return procedure for SR004 R1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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