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Taiwan Semiconductor Corporation BY253G
- Part No.:
- BY253G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
BY253G.pdf
- Description:
- 3A, 600V, STANDARD RECOVERY RECT
- Quantity:
- Payment:
- Shipping:
Inventory:1,147
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Product details
Overview
BY253G from Taiwan Semiconductor is a single-die standard rectifier diode rated for 3 A average forward current, 600 V repetitive peak reverse voltage (VRRM), and 150 A non-repetitive surge current (IFSM), operating up to 150°C junction temperature; used in DC-DC converters and switching-mode inverters where high reliability and low forward voltage are required.
For engineers reviewing the BY253G datasheet, BY253G pinout, BY253G application, or BY253G equivalent, key selection criteria include verified VRRM = 600 V, VF ≤ 1.0 V at 3 A/25°C, IR ≤ 5 µA at 25°C, DO-201AD package thermal resistance RθJA = 40°C/W, and cathode-band polarity marking.
Technical Context
The BY253G is a silicon planar junction standard rectifier optimized for general-purpose switching power applications. It features a single die in DO-201AD package with pure tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 1A whisker resistance.
Its electrical behavior is defined by fixed VRRM = 600 V (not adjustable), forward conduction limited by thermal resistance (RθJA = 40°C/W), and reverse leakage tightly specified at 5 µA @ 25°C and 100 µA @ 125°C under rated VR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - maximum repetitive reverse voltage the device blocks without breakdown |
| IF(AV) | 3 A - continuous average forward current at TA = 75°C with adequate heatsinking |
| IFSM | 150 A - peak non-repetitive surge current capability (8.3 ms half-sine) |
| VF | ≤1.0 V - forward voltage drop at IF = 3 A, TJ = 25°C, defining conduction loss |
| IR | ≤5 µA @ 25°C - reverse leakage current at rated VR, critical for standby efficiency |
| RθJA | 40 °C/W - junction-to-ambient thermal resistance in standard PCB mount, determines thermal derating |
| CJ | 40 pF - junction capacitance at 1 MHz / 4 V, impacts high-frequency switching noise |
Pinout & Package
DO-201AD axial-leaded package with cathode indicated by a band on the body; leads are pure tin-plated, solderable per J-STD-002, and meet UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry terminal | Connected to lower-potential side of rectified path; no internal protection |
| Cathode | Forward current exit terminal | Marked by band; connected to output rail or filter capacitor positive node |
Key Features
| Feature | Design Value |
|---|---|
| Low VF (≤1.0 V @ 3 A) | Reduces conduction losses in high-current DC-DC stages, improving system efficiency |
| High IFSM (150 A) | Withstands inrush and transient surges in SMPS startup and fault conditions |
| RoHS & Halogen-free | Complies with IEC 61249-2-21 and environmental regulations for industrial end equipment |
| Junction temp max = 150°C | Enables operation in thermally constrained enclosures without forced cooling |
| DO-201AD mechanical robustness | UL 94V-0 molding compound and JESD 201 Class 1A whisker resistance ensure long-term reliability |
Applications
| DC-DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 12–48 V outputs. IC Role / Device Role / Timing Role: Standard rectifier conducting during transformer secondary voltage polarity phase. Use Value: 600 V VRRM safely handles reflected transients; 3 A IF supports up to ~60 W output with minimal VF loss. | Use Scenario: Output stage rectification in single-phase H-bridge inverters for motor drives or UPS systems. IC Role / Device Role / Timing Role: Freewheeling and commutation path for inductive load current. Use Value: 150 A IFSM withstands short-circuit currents; 40 pF CJ minimizes switching noise coupling. |
| AC-DC Adapter | Industrial Power Supply |
Use Scenario: Input bridge rectification in universal-input (90–264 VAC) offline adapters. IC Role / Device Role / Timing Role: One leg of full-wave bridge converting AC line to pulsating DC. Use Value: 600 V VRRM exceeds 264 VAC × √2 ≈ 373 V peak, providing 60 % safety margin. | Use Scenario: Bulk rectification in 3 kW industrial SMPS with active PFC front-end. IC Role / Device Role / Timing Role: High-current output rectifier after LLC resonant stage. Use Value: RθJA = 40°C/W enables 3 A operation at 75°C ambient without heatsink; RoHS/halogen-free meets IPC standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L06S | VRRM = 600 V, IF = 3 A, VF = 1.05 V (max), DO-201AD, but faster recovery (trr = 50 ns) | Optimized for higher-frequency SMPS (>100 kHz); BY253G has slower recovery (~2 µs) | Select STTH3L06S when fast recovery reduces switching loss; retain BY253G for cost-sensitive 50–100 kHz designs. |
| ON Semi MUR360 | VRRM = 600 V, IF = 3 A, VF = 0.975 V (typ), DO-201AD, ultrafast trr = 35 ns | Designed for high-efficiency PFC and high-frequency rectification; higher cost than BY253G | Choose MUR360 only if trr < 50 ns is mandatory; BY253G remains optimal for general-purpose 60 Hz–100 kHz use. |
Compared with STTH3L06S and MUR360, the BY253G delivers identical 600 V/3 A ratings at lower cost and simpler thermal design, but trades off recovery speed-making it ideal for cost-driven, medium-frequency industrial power supplies where ultrafast switching is unnecessary.
Availability
BY253G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial power supplies requiring stable component supply across multi-year production cycles.
Supply support for BY253G 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 industrial, computing, and consumer markets since 1979.
The BY253G belongs to TSC's BY25xG standard rectifier family, engineered for high-reliability, cost-effective AC/DC and DC/DC power conversion in industrial-grade equipment.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for BY253G?
The BY253G has a VRRM rating of 600 V, confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version D2105). This value is fixed per part number and distinct from BY251G (200 V), BY252G (400 V), and BY254G (800 V). The 600 V rating ensures safe operation under worst-case transient overvoltage conditions in 230 VAC-derived supplies.
Does BY253G have a halogen-free construction?
Yes, the BY253G is halogen-free in accordance with IEC 61249-2-21, as explicitly stated in the FEATURES section of the Taiwan Semiconductor documentation. Its molding compound contains no brominated or chlorinated flame retardants, meeting environmental compliance requirements for industrial and automotive-adjacent applications.
What is the forward voltage (VF) specification for BY253G at rated current?
The BY253G has a maximum forward voltage of 1.0 V at IF = 3 A and TJ = 25°C, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and defines conduction loss in continuous operation-critical for thermal design in high-current rectifier stages.
Is BY253G compatible with lead-free reflow soldering processes?
Yes, the BY253G features pure tin-plated leads qualified to J-STD-002 for solderability, supporting both lead-free reflow (up to 260°C peak) and wave soldering. Its DO-201AD package is rated for standard JEDEC moisture sensitivity level (MSL) handling without baking, provided humidity exposure is controlled per packaging instructions.
What does the "G" suffix indicate in BY253G?
The "G" suffix in BY253G denotes green (halogen-free) compound per Taiwan Semiconductor's ordering nomenclature, as confirmed in the Marking Diagram and Features sections. It is not a grade or temperature variant-it specifically identifies compliance with IEC 61249-2-21 and RoHS Directive 2011/65/EU.
BY253G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 600 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 600 V
- Capacitance @ Vr, F:
- 40pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
BY253G FAQ
1.How can I place an order for BY253G through Aetrix?
Please submit a Request for Quotation (RFQ) for BY253G 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 BY253G reliable?
The price and inventory of BY253G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BY253G is usually 5 days.
3.What payment methods are accepted for BY253G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BY253G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BY253G?
BY253G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BY253G 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 BY253G?
For technical support, including BY253G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BY253G requirements.
6.How does Aetrix verify that BY253G is sourced from the original manufacturer or authorized distributors?
All BY253G 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 BY253G meets industry standards.
7.What is the process for return or replacement of BY253G?
All BY253G units undergo pre-shipment inspection (PSI). If there is an issue with BY253G, 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 BY253G part is unused and in its original packaging.
Return procedure for BY253G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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