My Inquiry
My Account
Taiwan Semiconductor Corporation SR109 B0G
- Part No.:
- SR109 B0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
SR109 B0G.pdf
- Description:
- DIODE SCHOTTKY 90V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,429
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SR109 B0G from Taiwan Semiconductor is a 1A, 90V Schottky barrier rectifier in DO-204AL (DO-41) package, featuring low forward voltage drop (0.85 V at 1 A, 25°C), high surge current capability (30 A), and junction temperature rating up to +150°C. It serves as a primary output rectifier in compact DC/DC converters and AC/DC adapters requiring high efficiency and space-constrained layouts.
For engineers reviewing the SR109 B0G datasheet, SR109 B0G pinout, SR109 B0G application, or SR109 B0G equivalent, key selection criteria include its 90 V repetitive peak reverse voltage, 100 µA max reverse leakage at 25°C, AEC-Q101 qualification option (H-suffix), thermal resistance of 90°C/W, and compatibility with lead-free reflow soldering per J-STD-002.
Technical Context
This discrete Schottky diode uses a single-die construction with guard ring structure for enhanced overvoltage robustness and meets JESD201 Class 2 whisker resistance. Its 10,000 V/µs critical dv/dt rating supports reliable operation in fast-switching topologies like synchronous buck and flyback converters.
The device operates across –55°C to +150°C junction temperature range and exhibits 2 mA max reverse current at 125°C under rated 90 V reverse bias - enabling stable performance in thermally demanding industrial power supplies and automotive auxiliary systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 90 V - maximum repetitive reverse blocking voltage; defines safe operating limit in DC/DC output stage |
| IF | 1 A continuous - average forward current rating at case temperature ≤ 75°C; sets conduction capacity |
| IFSM | 30 A - non-repetitive surge current (8.3 ms half-sine); withstands startup/inrush transients |
| VF | 0.85 V @ 1 A, 25°C - low conduction loss improves system efficiency and reduces heatsink need |
| RθJA | 90 °C/W - junction-to-ambient thermal resistance; determines temperature rise under 1 A DC load |
| IR | 100 µA @ 90 V, 25°C - low leakage preserves standby power in energy-sensitive applications |
| TJ max | +150°C - extended junction temperature enables use in under-hood automotive modules |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, epoxy-molded, RoHS-compliant, halogen-free, UL 94V-0 rated compound. Cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead without band) | Forward current entry point | Connected to lower-potential node (e.g., switch node or ground return) |
| Cathode (lead with band) | Forward current exit / reverse blocking terminal | Connected to output rail; blocks reverse current during off-state |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Improves ruggedness against transient overvoltage without external snubbers |
| AEC-Q101 qualified variant available | Supports automotive-grade reliability requirements (e.g., SR109H) |
| Pure tin-plated leads | Enables compatibility with Pb-free reflow processes per J-STD-002 |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in long-life industrial deployments |
| UL 94V-0 molding compound | Meets flammability safety standards for enclosed power supply enclosures |
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: Unidirectional current path delivering regulated DC output; replaces slower PN diodes to reduce conduction loss. Use Value: 0.85 V forward drop lowers power dissipation by ~35% vs. 1.2 V Si diode at 1 A, improving adapter efficiency to >90%. | Use Scenario: Output rectification in compact, multi-port USB-C PD wall adapters with dual 20 V rails. IC Role / Device Role / Timing Role: High-frequency switching rectifier synchronized with controller IC's gate drive timing. Use Value: 30 A surge rating handles repeated hot-plug events; 150°C TJ rating sustains operation during sustained full-load conditions. |
| Automotive Body Control Module (BCM) | Industrial PLC Power Input Stage |
Use Scenario: Reverse polarity protection and 12 V/24 V DC input rectification in BCM submodules. IC Role / Device Role / Timing Role: Polarity guard and bulk rectifier; leverages AEC-Q101-qualified variants for qualification compliance. Use Value: Guard ring design withstands load dump transients up to ISO 7637-2 Pulse 5a; 100 µA leakage minimizes battery drain in sleep mode. | Use Scenario: Input-stage rectification for 24 V DC power supplies feeding I/O modules in factory automation systems. IC Role / Device Role / Timing Role: Primary AC/DC interface component converting transformer secondary output to stable DC bus. Use Value: 90°C/W RθJA allows natural convection cooling on PCB; DO-41 footprint fits legacy board layouts without redesign. |
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-1EWH09-M3/5AT | Same DO-204AL package, 1 A / 90 V, VF = 0.82 V @ 1 A, but no AEC-Q101 option | Preferred for cost-sensitive industrial SMPS where automotive qualification is unnecessary | Select when prioritizing lowest VF and broad distributor availability over automotive compliance |
| ON Semiconductor SB190 | DO-41, 1 A / 90 V, VF = 0.87 V @ 1 A, TJ max = +125°C (not +150°C), no guard ring | Suitable for consumer adapters with moderate thermal stress; not recommended for under-hood use | Choose only if existing design already uses SB190 and thermal margin exceeds 25°C |
Compared with VS-1EWH09-M3/5AT and SB190, SR109 B0G provides higher junction temperature rating (+150°C), integrated guard ring for transient immunity, and AEC-Q101-qualified variant path - making it optimal for thermally constrained or automotive-adjacent industrial power designs.
Availability
SR109 B0G is available at Aetrix Electronics and suitable for switching mode power supplies, USB-C PD adapters, and industrial PLC power input stages requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for SR109 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and AEC-Q101 qualification capability.
The SR102–SR115 series was designed specifically for high-efficiency, space-constrained AC/DC and DC/DC power conversion in industrial, computing, and automotive auxiliary applications - emphasizing low VF, rugged packaging, and thermal reliability.
FAQ
What is the maximum junction temperature rating for SR109 B0G?
The SR109 B0G has a maximum junction temperature (TJ) rating of +150°C, verified per the manufacturer's absolute maximum ratings table. This allows operation in high-ambient environments such as enclosed power adapters or under-hood automotive modules. The SR109 B0G must be derated above +75°C case temperature per the forward current derating curve in the datasheet.
Does SR109 B0G have AEC-Q101 qualification?
The SR109 B0G itself is not AEC-Q101 qualified; however, the SR109H variant (same electrical specs, DO-41 package) is explicitly AEC-Q101 qualified per the ordering information table. SR109 B0G is intended for industrial and commercial applications where automotive reliability testing is not required.
What is the forward voltage drop of SR109 B0G at 1 A and 25°C?
The SR109 B0G has a typical forward voltage drop (VF) of 0.85 V at 1 A forward current and 25°C junction temperature, as specified in the Electrical Specifications table. This value is measured under pulse test conditions (PW = 0.3 ms) and represents a key efficiency parameter for low-loss rectification in SR109 B0G-based designs.
Is SR109 B0G compatible with lead-free reflow soldering processes?
Yes, SR109 B0G features pure tin-plated leads compliant with J-STD-002 for solderability, and its DO-204AL package is rated for lead-free reflow profiles. The epoxy molding compound meets UL 94V-0 and is halogen-free per IEC 61249-2-21 - confirming full compatibility with modern Pb-free assembly lines used for SR109 B0G integration.
What is the reverse leakage current of SR109 B0G at 90 V and 125°C?
At 90 V reverse voltage and 125°C junction temperature, the SR109 B0G exhibits a maximum reverse leakage current (IR) of 2 mA, as stated in the Electrical Specifications table. This value is critical for standby power budgeting in always-on systems and confirms stable blocking behavior under elevated thermal stress in SR109 B0G deployments.
SR109 B0G 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:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SR109 B0G FAQ
1.How can I place an order for SR109 B0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SR109 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 SR109 B0G reliable?
The price and inventory of SR109 B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR109 B0G is usually 5 days.
3.What payment methods are accepted for SR109 B0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR109 B0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR109 B0G?
SR109 B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR109 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 SR109 B0G?
For technical support, including SR109 B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR109 B0G requirements.
6.How does Aetrix verify that SR109 B0G is sourced from the original manufacturer or authorized distributors?
All SR109 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 SR109 B0G meets industry standards.
7.What is the process for return or replacement of SR109 B0G?
All SR109 B0G units undergo pre-shipment inspection (PSI). If there is an issue with SR109 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 SR109 B0G part is unused and in its original packaging.
Return procedure for SR109 B0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SR109 B0G Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
