My Inquiry
My Account
Taiwan Semiconductor Corporation BA157G B0G
- Part No.:
- BA157G B0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BA157G B0G.pdf
- Description:
- DIODE GEN PURP 400V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,978
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BA157G from Taiwan Semiconductor is a 1A, 400V fast recovery rectifier diode in DO-204AL (DO-41) package, featuring 150ns reverse recovery time, 1.2V max forward voltage at 1A, and 30A 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 (400V), thermal resistance (60°C/W), junction temperature range (–55°C to +150°C), AEC-Q101 qualification status, and DO-41 mechanical compatibility in space-constrained power supplies.
Technical Context
The BA157G employs a glass-passivated single-die PN junction optimized for fast recovery (trr ≤ 150ns) and low conduction loss. Its 1.2V VF max at 1A and 5µA IR at 25°C support high-efficiency operation in high-frequency switching topologies.
Designed for ambient temperatures up to 75°C with derated current, it maintains stable performance under transient surge conditions (30A, 8.3ms half-sine) and meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.
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 - Reverse recovery time enabling use in ≥100 kHz SMPS designs |
| VF (max) | 1.2 V @ 1A, 25°C - Low conduction loss reduces heat generation in compact layouts |
| RθJA | 60 °C/W - Thermal resistance defining junction-to-ambient rise per watt dissipated |
| IFSM | 30 A - Non-repetitive surge current handling for startup/load-dump transients |
| TJ Range | –55°C to +150°C - Operating junction temperature range supporting automotive under-hood use |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, glass-passivated, cathode indicated by band. Weight: 0.330 g. Leads are pure tin-plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of input source (e.g., transformer secondary or switch node) |
| Cathode | Forward current exit point | Marked with band; connects to output rail or filter capacitor positive terminal |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery (trr ≤ 150 ns) | Enables efficient operation in high-frequency DC-DC converters (>100 kHz) with minimal switching loss |
| Glass passivated junction | Provides robust moisture and contamination resistance for long-term reliability in humid environments |
| AEC-Q101 qualified option (BA157GH) | Validated for automotive power electronics requiring stress-tested component qualification |
| UL 94V-0 molding compound | Ensures flame-retardant behavior in safety-critical power supply enclosures |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth on leads during long-term storage or elevated temperature operation |
Applications
| DC-DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V outputs. IC Role / Device Role / Timing Role: Unidirectional current steering device converting high-frequency AC from transformer into regulated DC. Use Value: 150 ns trr minimizes reverse recovery loss, improving efficiency over standard rectifiers at 100–500 kHz switching frequencies. | Use Scenario: Output stage rectification in solar microinverters or UPS systems converting 50/60 Hz-modulated high-frequency AC to DC. IC Role / Device Role / Timing Role: Fast-switching power diode handling bidirectional energy flow during PWM commutation cycles. Use Value: 30 A IFSM withstands inverter startup surges; 1.2 V VF limits conduction loss in thermally constrained heatsinkless designs. |
| Automotive Power Supply | Industrial AC-DC Adapter |
Use Scenario: Input rectification in 12 V battery-fed auxiliary power modules (e.g., infotainment, ADAS sensors). IC Role / Device Role / Timing Role: Primary rectifier in offline or buck-derived supplies operating across –40°C to +105°C ambient. Use Value: AEC-Q101-qualified variant (BA157GH) supports automotive qualification; –55°C to +150°C TJ range ensures reliability under hood thermal cycling. | Use Scenario: General-purpose bridge or discrete rectification in industrial control power supplies rated for continuous 24/48 V DC output. IC Role / Device Role / Timing Role: High-reliability discrete rectifier replacing legacy 1N400x series where faster recovery and lower VF are required. Use Value: Glass passivation and halogen-free construction meet IPC-1752 and RoHS compliance mandates for industrial equipment. |
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 1A/400V rating; trr = 35 ns (faster), VF = 1.3 V (higher), DO-41 package | Better suited for >500 kHz designs where ultra-fast recovery outweighs VF penalty | Select STTH1R04 when minimizing switching loss dominates over conduction loss |
| ON Semi MUR140 | Same 1A/400V; trr = 50 ns, VF = 1.15 V, DO-41, AEC-Q101 not offered | Higher efficiency at light loads; lacks automotive qualification path | Choose MUR140 for cost-sensitive industrial adapters where AEC-Q101 is unnecessary |
Compared with STTH1R04 and MUR140, the BA157G offers balanced trr/VF trade-off and AEC-Q101 availability-making it optimal for automotive-adjacent and mid-frequency SMPS where qualification and thermal robustness are prioritized over extreme speed.
Availability
BA157G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and automotive auxiliary power supplies requiring stable component supply with full traceability and long-term lifecycle support.
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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving global industrial and automotive markets since 1979.
The BA157G belongs to TSC's BA15xG fast recovery rectifier family, engineered specifically for high-efficiency, high-reliability AC/DC and DC/DC power conversion in thermally demanding and safety-critical applications.
FAQ
What is the maximum junction temperature rating for BA157G?
The BA157G has a maximum junction temperature (TJ MAX) of +150°C, with an operational range from –55°C to +150°C. This rating enables reliable use in under-hood automotive environments and enclosed industrial power supplies where ambient temperatures exceed 85°C. The BA157G must be mounted with adequate thermal relief to avoid exceeding this limit during sustained 1A conduction.
Is BA157G pin-compatible with standard DO-41 rectifiers like 1N4007?
Yes, the BA157G uses the DO-204AL (DO-41) package with identical mechanical dimensions and axial lead configuration as 1N4007, allowing direct PCB footprint reuse. However, its 150 ns trr and 1.2 V VF differ significantly from 1N4007's 30 µs trr and ~1.1 V VF-making BA157G unsuitable as a drop-in replacement in low-frequency line-frequency rectification but ideal for high-frequency SMPS upgrades.
Does BA157G meet automotive qualification standards?
The base BA157G is not AEC-Q101 qualified, but the variant BA157GH is explicitly qualified per AEC-Q101. Both share identical electrical and thermal specs; only BA157GH undergoes additional stress testing (HTGB, TCT, UHAST) required for automotive power modules. For automotive designs, specify BA157GH-not BA157G-to ensure compliance.
What is the reverse recovery time (trr) specification for BA157G?
The BA157G has a maximum reverse recovery time (trr) of 150 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This value is confirmed in the official Taiwan Semiconductor datasheet Version I2106 and enables efficient operation in switching power supplies operating up to 500 kHz. Trr directly impacts switching loss and EMI profile in hard-switched topologies.
How does BA157G compare to BA158G and BA159G in voltage rating?
The BA157G is rated for 400 V VRRM, while BA158G is 600 V and BA159G is 1000 V-all sharing identical current (1 A), trr (150 ns / 250 ns), VF, and package. Voltage selection depends on system peak reverse stress: BA157G suits 28 V–48 V DC bus systems with <300 V transients; higher-voltage variants are required for 400 VAC inputs or PFC stages.
BA157G 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:
- 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 B0G FAQ
1.How can I place an order for BA157G B0G through Aetrix?
Please submit a Request for Quotation (RFQ) for BA157G 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 BA157G B0G reliable?
The price and inventory of BA157G B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BA157G B0G is usually 5 days.
3.What payment methods are accepted for BA157G B0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BA157G B0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BA157G B0G?
BA157G B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BA157G 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 BA157G B0G?
For technical support, including BA157G B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BA157G B0G requirements.
6.How does Aetrix verify that BA157G B0G is sourced from the original manufacturer or authorized distributors?
All BA157G 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 BA157G B0G meets industry standards.
7.What is the process for return or replacement of BA157G B0G?
All BA157G B0G units undergo pre-shipment inspection (PSI). If there is an issue with BA157G 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 BA157G B0G part is unused and in its original packaging.
Return procedure for BA157G B0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BA157G 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…
