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Taiwan Semiconductor Corporation BA157G A0G
- Part No.:
- BA157G A0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BA157G A0G.pdf
- Description:
- DIODE GEN PURP 400V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,706
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Product details
Overview
BA157G from Taiwan Semiconductor is a 1A, 400V fast recovery rectifier diode in DO-204AL (DO-41) package, featuring 150 ns reverse recovery time, 1.2 V max forward voltage at 1 A, and 30 A surge capability-used in DC-DC converters and switching inverters for high-efficiency power conversion.
For engineers reviewing the BA157G datasheet, BA157G pinout, BA157G application, or BA157G equivalent, key selection criteria include repetitive peak reverse voltage (400 V), thermal resistance (60 °C/W), junction temperature range (–55 to +150 °C), RoHS/halogen-free compliance, and AEC-Q101 qualification availability.
Technical Context
The BA157G employs a glass-passivated single-die silicon junction optimized for fast recovery (trr ≤ 150 ns) and low conduction loss. Its 1.2 V max VF at 1 A and 5 µA max IR at 25 °C support high-efficiency operation in medium-frequency switching topologies.
Designed for ambient temperatures up to 75 °C at full 1 A DC current (derated above), it delivers stable performance under repetitive surge conditions (8.3 ms half-sine, 30 A) and meets JESD201 Class 2 whisker resistance with pure tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse blocking voltage without breakdown |
| IF | 1 A - Continuous average forward current rating at TA = 75 °C |
| trr | ≤150 ns - Fast recovery enables use in 50–200 kHz SMPS designs |
| VF (max) | 1.2 V @ 1 A, 25 °C - Low conduction loss reduces heat generation in compact layouts |
| IFSM | 30 A - Withstands short-duration surges common during power-up or fault events |
| RθJA | 60 °C/W - Enables thermal management on standard FR-4 PCBs without heatsink |
| IR (max) | 5 µA @ 25 °C - Low leakage preserves efficiency in high-impedance bias networks |
Pinout & Package
DO-204AL (DO-41) axial-leaded package with cathode band marking; lead finish: pure tin, solderable per J-STD-002; UL 94V-0 molding compound; weight ≈ 0.330 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., transformer secondary or switch node) |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to output rail or filter capacitor positive terminal |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances humidity resistance and long-term reliability in automotive/industrial environments |
| AEC-Q101 qualified version available | Validated for automotive powertrain and body electronics per stress test requirements |
| RoHS & halogen-free | Complies with IEC 61249-2-21; supports green manufacturing and end-of-life recycling |
| Low VF and high IFSM | Enables compact, thermally efficient designs in space-constrained DC-DC modules |
Applications
| DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: Isolated buck-boost converter in industrial PLC power supplies operating at 100 kHz. IC Role / Device Role / Timing Role: Output rectifier handling 1 A continuous current with minimal conduction loss. Use Value: 1.2 V max VF and 150 ns trr reduce switching losses and thermal stress vs. standard recovery diodes. | Use Scenario: Single-phase H-bridge inverter driving AC induction motors in HVAC systems. IC Role / Device Role / Timing Role: Freewheeling diode clamping inductive kickback during PWM transitions. Use Value: 30 A IFSM withstands motor startup surges; 60 °C/W RθJA allows direct PCB mounting without heatsink. |
| Automotive Body Control | LED Driver Power Stage |
Use Scenario: 12 V input-to-5 V output supply for door module ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Secondary-side rectifier in flyback topology, AEC-Q101-qualified variant used. Use Value: Glass passivation and whisker-resistant plating ensure reliability across –40 to +125 °C ambient cycles. | Use Scenario: Constant-current LED driver for commercial signage with 24 V input and 350 mA output. IC Role / Device Role / Timing Role: Synchronous rectification assist diode in quasi-resonant forward converter. Use Value: Low 5 µA IR at 25 °C prevents standby current drift; DO-41 footprint simplifies manual rework. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R04 | Same 1 A / 400 V rating; trr = 45 ns (faster), VF = 1.3 V (higher), TO-220AC package | Requires heatsink due to higher thermal resistance; suited for higher-power, forced-air-cooled systems | Select when faster recovery is critical and board space allows TO-220 mounting |
| ON Semi MUR1040 | 1 A / 400 V; trr = 50 ns, VF = 1.25 V, DO-41 package, no AEC-Q101 option | Lacks automotive qualification; identical footprint but lower leakage (IR = 2 µA @ 25 °C) | Prefer for cost-sensitive consumer or industrial designs where AEC-Q101 is not required |
Compared with STTH1R04 and MUR1040, the BA157G offers balanced speed-loss trade-off in DO-41, AEC-Q101 availability, and lowest VF among DO-41 400 V fast rectifiers-making it optimal for space-constrained automotive and industrial SMPS where qualification and thermal simplicity matter.
Availability
BA157G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and automotive body control modules requiring stable component supply, long-lifecycle sourcing, and RoHS-compliant procurement.
Supply support for BA157G 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, automotive, and consumer markets since 1979.
The BA157G belongs to TSC's BA15xG fast recovery rectifier family, engineered for high-reliability power conversion in cost-sensitive, thermally constrained applications where DO-41 compatibility and qualification readiness are essential.
FAQ
What is the maximum junction temperature rating for BA157G?
The BA157G has a maximum junction temperature (TJ) rating of +150 °C, with operational range from –55 °C to +150 °C. This allows reliable use in under-hood automotive environments and industrial enclosures where ambient temperatures exceed 85 °C, provided thermal design maintains junction temperature within limit using its 60 °C/W RθJA value.
Is BA157G pin-compatible with other DO-41 rectifiers like 1N4007?
No-BA157G is not pin-compatible with 1N4007 in functional or electrical terms. While both use DO-41 packaging, the BA157G is a fast recovery rectifier (trr ≤ 150 ns), whereas 1N4007 is a general-purpose rectifier (trr > 2 µs). Their differing recovery characteristics make them unsuitable as drop-in replacements in switching circuits.
Does BA157G meet automotive qualification standards?
The BA157G itself is not AEC-Q101 qualified; however, the BA157GH variant (same die, AEC-Q101 tested) is available. The "H" suffix denotes qualification-BA157G A0G (ammo box packaging) retains the same electrical specs but lacks the automotive stress test validation required for powertrain or safety-critical modules.
What is the reverse leakage current specification for BA157G at elevated temperature?
At TJ = 125 °C and rated VR, the BA157G exhibits a maximum reverse leakage current (IR) of 100 µA. This is significantly higher than its 5 µA max at 25 °C, reflecting expected silicon behavior-designers must verify system-level leakage budgets account for this 20× increase under thermal stress.
Can BA157G be used in place of BA158G or BA159G in a design?
No-BA157G (400 V VRRM) cannot replace BA158G (600 V) or BA159G (1000 V) in circuits where reverse voltage exceeds 400 V. Although all share DO-41 packaging and similar trr/VF, their voltage ratings are non-interchangeable; using BA157G in a 600 V circuit risks catastrophic failure due to premature avalanche breakdown.
BA157G A0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 150 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Capacitance @ Vr, F:
- 15pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
BA157G A0G FAQ
1.How can I place an order for BA157G A0G through Aetrix?
Please submit a Request for Quotation (RFQ) for BA157G A0G 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 BA157G A0G reliable?
The price and inventory of BA157G A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BA157G A0G is usually 5 days.
3.What payment methods are accepted for BA157G A0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BA157G A0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BA157G A0G?
BA157G A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BA157G A0G 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 BA157G A0G?
For technical support, including BA157G A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BA157G A0G requirements.
6.How does Aetrix verify that BA157G A0G is sourced from the original manufacturer or authorized distributors?
All BA157G A0G 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 BA157G A0G meets industry standards.
7.What is the process for return or replacement of BA157G A0G?
All BA157G A0G units undergo pre-shipment inspection (PSI). If there is an issue with BA157G A0G, 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 BA157G A0G part is unused and in its original packaging.
Return procedure for BA157G A0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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