My Inquiry
My Account
Taiwan Semiconductor Corporation SR305
- Part No.:
- SR305
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SR305.pdf
- Description:
- DIODE SCHOTTKY 50V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:6,283
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SR305 from Taiwan Semiconductor is a 3A, 50V Schottky barrier rectifier in DO-201AD package, featuring 0.70V max forward voltage at 3A and 5mA max reverse leakage at 100°C junction temperature. It delivers high surge current capability (80A), low power loss, and AEC-Q101 qualification for automotive-grade reliability in DC/DC converters and SMPS.
For engineers reviewing the SR305 datasheet, SR305 pinout, SR305 application, or SR305 equivalent, key selection factors include its 50V VRRM, thermal resistance (RθJA = 50°C/W), cathode-band polarity marking, and compatibility with J-STD-002 soldering standards.
Technical Context
This single-die Schottky rectifier operates with a maximum junction temperature of +150°C and exhibits a critical dv/dt rating of 10,000 V/µs. Its guard ring structure provides overvoltage protection while enabling stable performance under repetitive surge conditions (8.3ms half-sine).
The device uses pure tin-plated leads compliant with JESD201 Class 2 whisker testing and UL 94V-0 molding compound. Reverse leakage is specified at 500 µA (25°C) and 5 mA (100°C), directly supporting high-efficiency power conversion where thermal management and leakage control are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum non-repetitive reverse blocking voltage; defines safe operating range in flyback or buck converter freewheeling paths |
| IF | 3 A - Continuous average forward current; supports compact 3A-rated power stages without forced cooling |
| IFSM | 80 A - Peak non-repetitive surge current; withstands inrush and transient overload in adapter inputs |
| VF (max) | 0.70 V @ 3A, 25°C - Low conduction loss enables >92% efficiency in 12V-output SMPS designs |
| RθJA | 50 °C/W - Junction-to-ambient thermal resistance; determines required PCB copper area for 125°C operation at full load |
| TJ (max) | +150 °C - Maximum junction temperature; allows operation in under-hood automotive environments |
| IR (max) | 5 mA @ 100°C - Reverse leakage threshold; ensures minimal standby power loss in battery-backed systems |
Pinout & Package
Package: DO-201AD - Axial leaded, epoxy-molded case with cathode band marking; 1.10g weight; UL 94V-0 rated compound; polarity indicated by visible cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead without band) | Forward current entry point | Connected to input/source side in unidirectional power flow; requires adequate trace width for 3A continuous |
| Cathode (lead with band) | Forward current exit / reverse voltage reference | Connected to output/load side; serves as reference node for voltage clamping and snubber design |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option (SR305H) | Validated for automotive power modules requiring stress-tested reliability under temperature cycling and humidity exposure |
| Guard ring structure | Prevents premature edge breakdown at high dv/dt, improving robustness in fast-switching topologies like LLC resonant converters |
| Pure tin-plated leads | Ensures consistent solder wetting and intermetallic formation per J-STD-002, reducing voiding risk in reflow assembly |
| 10,000 V/µs dv/dt rating | Supports reliable operation in high-frequency (>300 kHz) switching circuits without false turn-on or avalanche triggering |
Applications
| Automotive DC/DC Converters | Laptop Adapter Secondary Rectification |
|---|---|
Use Scenario: 12V–48V bidirectional DC/DC stage in 48V mild-hybrid vehicle architectures. IC Role / Device Role / Timing Role: Freewheeling Schottky rectifier in synchronous buck topology, replacing MOSFET body diode during dead-time. Use Value: 0.70V VF reduces conduction loss by ~35% vs. standard PN rectifiers, directly improving system efficiency at 3A load. | Use Scenario: Output rectification in 19V/3.42A laptop AC-DC adapters. IC Role / Device Role / Timing Role: Unidirectional current path on secondary side, handling continuous 3A output with minimal thermal rise. Use Value: RθJA = 50°C/W enables operation within 125°C junction limit using only 2 oz copper on double-sided PCB-no heatsink required. |
| Industrial SMPS Auxiliary Supplies | LED Driver Flyback Outputs |
Use Scenario: 5V/1A auxiliary bias supply in industrial PLC power modules. IC Role / Device Role / Timing Role: Output rectifier in isolated flyback converter powering control logic and gate drivers. Use Value: 500 µA IR at 25°C minimizes no-load power draw, meeting Energy Star Level VI standby requirements. | Use Scenario: Constant-current LED string rectification in outdoor lighting drivers. IC Role / Device Role / Timing Role: High-reliability output rectifier exposed to ambient temperatures up to 85°C. Use Value: +150°C TJ rating ensures 10+ year lifetime at 85°C ambient with 5 mA IR ceiling limiting thermal runaway risk. |
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-3EY50 | Same DO-201AD package, 3A/50V, but VF = 0.72V (max) and IR = 1.0 mA @ 100°C | Slightly higher leakage limits use in ultra-low-power standby circuits | Preferred where tighter IR spec is needed; otherwise functionally interchangeable |
| ON Semiconductor SB350 | DO-201AD, 3A/50V, VF = 0.75V (max), IR = 500 µA @ 25°C, no AEC-Q101 variant | Lacks automotive qualification; lower surge rating (60A IFSM) | Select when AEC-Q101 compliance is not required and cost sensitivity outweighs surge margin |
Compared with VS-3EY50 and SB350, SR305 offers superior thermal robustness (+150°C TJ), lower VF than SB350, and AEC-Q101 availability-making it optimal for automotive and high-reliability industrial power supplies where leakage, surge, and temperature margins are jointly constrained.
Availability
SR305 is available at Aetrix Electronics and suitable for automotive DC/DC converters, laptop adapters, and industrial SMPS requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SR305 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 power electronics markets since 1979.
The SR302–SR320 series was designed specifically for high-efficiency, high-reliability rectification in automotive and industrial power conversion-emphasizing low VF, robust surge handling, and AEC-Q101 qualification across voltage grades.
FAQ
What is the maximum junction temperature rating for SR305?
The SR305 has a maximum junction temperature (TJ) rating of +150°C, verified per JEDEC test conditions. This allows the SR305 to operate reliably in under-hood automotive environments and high-ambient industrial enclosures without derating below 3A at moderate airflow. The SR305's thermal design must maintain this limit using its RθJA = 50°C/W specification.
Is SR305 available in an AEC-Q101 qualified version?
Yes, the SR305H variant is AEC-Q101 qualified and marked with "H" in the ordering code. It undergoes accelerated stress testing including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing (uHAST) per AEC-Q101 Rev D. The SR305H shares identical electrical specs and DO-201AD packaging with the standard SR305.
What is the forward voltage drop of SR305 at 3A and 25°C?
The SR305 has a maximum forward voltage (VF) of 0.70 V at 3A and 25°C, measured under pulsed conditions (PW = 0.3 ms). This value is confirmed in the Electrical Specifications table for the SR305/SR306 group. At elevated temperatures (e.g., 100°C), VF decreases slightly due to Schottky diode physics, improving conduction efficiency in thermally stressed operation.
Does SR305 have a defined reverse recovery time (trr)?
No-SR305 is a Schottky barrier rectifier and exhibits no minority-carrier storage, so it has effectively zero reverse recovery time (trr ≈ 0 ns). This eliminates switching losses and EMI associated with PN diode recovery, making the SR305 especially suitable for high-frequency (>200 kHz) SMPS designs where trr-related ringing would otherwise degrade efficiency.
What packaging options are offered for SR305?
SR305 is supplied in DO-201AD package with two standard packing formats: 1,250 units per tape-and-reel (ordering code SR305) and 500 units per ammo box (ordering code SR305A0G). AEC-Q101 qualified versions use SR305H and SR305HA0G codes respectively. All variants feature pure tin-plated leads and UL 94V-0 epoxy molding compound.
SR305 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
SR305 FAQ
1.How can I place an order for SR305 through Aetrix?
Please submit a Request for Quotation (RFQ) for SR305 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 SR305 reliable?
The price and inventory of SR305 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR305 is usually 5 days.
3.What payment methods are accepted for SR305?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR305 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR305?
SR305 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR305 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 SR305?
For technical support, including SR305 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR305 requirements.
6.How does Aetrix verify that SR305 is sourced from the original manufacturer or authorized distributors?
All SR305 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 SR305 meets industry standards.
7.What is the process for return or replacement of SR305?
All SR305 units undergo pre-shipment inspection (PSI). If there is an issue with SR305, 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 SR305 part is unused and in its original packaging.
Return procedure for SR305:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SR305 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…
