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Taiwan Semiconductor Corporation SR109HB0G
- Part No.:
- SR109HB0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
SR109HB0G.pdf
- Description:
- DIODE SCHOTTKY 90V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,885
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Product details
Overview
SR109HB0G from Taiwan Semiconductor is a 1A, 90V AEC-Q101 qualified Schottky barrier rectifier in DO-204AL (DO-41) package, featuring 0.85V forward voltage at 1A/25°C, 30A surge current capability, and 100µA reverse leakage at 25°C - used in automotive-grade DC-DC converters and SMPS secondary-side rectification.
For engineers reviewing the SR109HB0G datasheet, SR109HB0G pinout, SR109HB0G application, or SR109HB0G equivalent, key selection factors include its AEC-Q101 qualification, 90V VRRM, low VF for thermal efficiency, DO-41 mechanical compatibility, and 125°C maximum junction temperature for under-hood power conversion designs.
Technical Context
This discrete Schottky diode operates as a unidirectional power rectifier with single-die construction and guard ring overvoltage protection. Its 10,000 V/µs dv/dt rating supports fast-switching topologies, while the pure tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
The device is rated for continuous operation up to 125°C junction temperature (with derating above 25°C ambient), and exhibits 90°C/W junction-to-ambient thermal resistance in standard PCB mounting - enabling compact layout in space-constrained automotive adapters and industrial power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 90 V - maximum repetitive reverse voltage; defines safe blocking capability in 48V automotive bus or 72V industrial DC link applications |
| IF | 1 A - average forward current; supports continuous conduction mode in sub-15W SMPS outputs |
| VF | 0.85 V @ 1A, 25°C - low conduction loss reduces heat generation and improves system efficiency vs. silicon PN diodes |
| IFSM | 30 A - non-repetitive surge current handling; withstands inrush and transient overloads without failure |
| IR | 100 µA @ 90V, 25°C - low reverse leakage preserves standby power budget in always-on systems |
| TJ max | 125 °C - junction temperature limit; enables use in engine compartment environments with active thermal management |
| RθJA | 90 °C/W - thermal resistance determines required copper area and airflow for thermal compliance |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case with cathode band marking. Weight: 0.330 g. UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead without band) | Current entry terminal | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node return) |
| Cathode (lead with band) | Current exit terminal | Connected to output rail or filter capacitor positive; polarity must be observed to prevent reverse breakdown |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive power electronics per stress test requirements including HTOL, TC, HAST, and UHAST |
| Guard ring structure | Enhances edge termination robustness against localized electric field crowding during voltage transients |
| Pure tin plating | Ensures reliable solder wetting and eliminates whisker-induced short-circuit risk in long-life deployments |
| Halogen-free construction | Complies with IEC 61249-2-21; supports RoHS-compliant manufacturing and end-of-life recycling |
Applications
| Automotive DC-DC Converters | Industrial SMPS Secondary Rectification |
|---|---|
Use Scenario: 12V-to-5V/3.3V buck converter in ADAS camera module power supply. IC Role / Device Role / Timing Role: Output rectifier replacing synchronous MOSFET in cost-sensitive, thermally constrained layout. Use Value: 0.85V VF minimizes conduction loss at 1A load, reducing heatsink requirement and enabling conformal coating over bare DO-41 leads. | Use Scenario: 24V input, 12V output flyback converter in PLC I/O module. IC Role / Device Role / Timing Role: Secondary-side freewheeling diode in discontinuous conduction mode (DCM). Use Value: 30A IFSM safely absorbs transformer reset energy spikes without derating, improving reliability over 10-year field life. |
| USB-C PD Adapters | Telecom Power Interface Protection |
Use Scenario: Secondary-side rectification in 65W GaN-based USB-C PD adapter. IC Role / Device Role / Timing Role: Low-loss output diode in quasi-resonant flyback topology operating at 100–200 kHz. Use Value: 90°C/W RθJA allows direct mounting on 1-oz copper with minimal thermal relief, simplifying thermal design versus SMD alternatives. | Use Scenario: Reverse polarity and overvoltage clamp in -48V telecom power interface board. IC Role / Device Role / Timing Role: Input protection diode placed before DC-DC regulator IC. Use Value: Guard ring + 90V VRRM provides margin against line surges up to ±100V, meeting GR-1089 Level 3 immunity requirements. |
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-1EQH09-M3/45 | Same 90V VRRM, 1A IF, but TO-277 surface-mount package; VF = 0.82V @ 1A | Requires rework of PCB layout; better thermal performance in high-airflow environments | Select when automated SMT assembly and higher power density are prioritized over through-hole serviceability |
| ON Semiconductor SB190 | 90V VRRM, 1A IF, DO-41 package, but not AEC-Q101 qualified; VF = 0.88V @ 1A | Lacks automotive qualification; suitable only for commercial/industrial grade systems | Select only for non-automotive applications where AEC-Q101 is not mandated and slightly higher VF is acceptable |
Compared with VS-1EQH09-M3/45 and SB190, the SR109HB0G uniquely combines AEC-Q101 qualification, DO-41 through-hole compatibility, and 0.85V forward voltage - making it the preferred choice for automotive replacement modules and legacy board upgrades requiring no layout change.
Availability
SR109HB0G is available at Aetrix Electronics and suitable for automotive power conversion, industrial SMPS design, and telecom interface protection requiring stable component supply across multi-year production cycles.
Supply support for SR109HB0G 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 SR102–SR115 series was developed specifically for high-reliability, cost-optimized Schottky rectification in automotive and industrial power supplies - emphasizing AEC-Q101 compliance, thermal robustness, and lead-free manufacturability.
FAQ
What does the 'H' in SR109HB0G signify?
The 'H' in SR109HB0G indicates AEC-Q101 qualification - confirming that the SR109HB0G has passed rigorous automotive reliability stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing. This makes the SR109HB0G suitable for under-hood and safety-critical vehicle subsystems.
Is SR109HB0G compatible with lead-free reflow soldering processes?
Yes, SR109HB0G features pure tin-plated leads compliant with J-STD-002 for solderability and meets JESD201 Class 2 whisker resistance requirements. It supports standard lead-free reflow profiles (peak 260°C) and wave soldering, with no special pre-baking needed for moisture sensitivity level (MSL) - the SR109HB0G is MSL-1 rated.
What is the maximum allowable junction temperature for SR109HB0G?
The SR109HB0G has a maximum junction temperature (TJ) of 125°C under continuous operation, as specified in its absolute maximum ratings. Derating is required above 25°C ambient temperature per the forward current derating curve in the datasheet - the SR109HB0G maintains full 1A rating only up to ~60°C ambient with standard PCB mounting.
How does SR109HB0G differ from SR109B0G?
The SR109HB0G includes the 'H' suffix denoting AEC-Q101 qualification, whereas SR109B0G lacks this automotive qualification and associated test documentation. Electrically and mechanically, both share identical VRRM (90V), IF (1A), DO-41 package, and marking code - but only the SR109HB0G is approved for automotive applications per ISO/TS 16949 production controls.
Can SR109HB0G replace SR110HB0G in a design?
No - SR109HB0G (90V VRRM) and SR110HB0G (100V VRRM) are not interchangeable without circuit review. While both share same IF, package, and qualification, the 10V difference in reverse voltage rating affects surge margin and reliability in high-transient environments. Substitution requires verification of peak reverse stress in the target application for the SR109HB0G.
SR109HB0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 90 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 850 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 90 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SR109HB0G FAQ
1.How can I place an order for SR109HB0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR109HB0G 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 SR109HB0G reliable?
The price and inventory of SR109HB0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR109HB0G is usually 5 days.
3.What payment methods are accepted for SR109HB0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR109HB0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR109HB0G?
SR109HB0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR109HB0G 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 SR109HB0G?
For technical support, including SR109HB0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR109HB0G requirements.
6.How does Aetrix verify that SR109HB0G is sourced from the original manufacturer or authorized distributors?
All SR109HB0G 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 SR109HB0G meets industry standards.
7.What is the process for return or replacement of SR109HB0G?
All SR109HB0G units undergo pre-shipment inspection (PSI). If there is an issue with SR109HB0G, 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 SR109HB0G part is unused and in its original packaging.
Return procedure for SR109HB0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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