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Taiwan Semiconductor Corporation BA157GH
- Part No.:
- BA157GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BA157GH.pdf
- Description:
- DIODE GEN PURP 400V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
BA157GH from Taiwan Semiconductor is an AEC-Q101 qualified, 1A, 400V fast recovery rectifier diode in DO-204AL (DO-41) package, featuring 1.2V max forward voltage at 1A, 150ns reverse recovery time, and 30A surge capability - deployed in automotive DC-DC converters and industrial switching inverters.
For engineers reviewing the BA157GH datasheet, BA157GH pinout, BA157GH application, or BA157GH equivalent, key selection criteria include its AEC-Q101 qualification, 400V VRRM, 150ns trr, glass-passivated junction, and DO-41 mechanical compatibility with legacy through-hole power designs.
Technical Context
The BA157GH uses a single-die, planar epitaxial construction with glass passivation for enhanced moisture resistance and thermal stability. Its fast recovery (trr ≤ 150ns) enables efficient operation in high-frequency switching topologies up to 100 kHz.
Designed for automotive-grade reliability, it supports continuous junction temperatures from –55°C to +150°C, exhibits ≤5 µA reverse leakage at 25°C, and delivers low conduction loss (VF ≤ 1.2V @ 1A) while maintaining robust 30A non-repetitive surge tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in DC-DC flyback or boost stages |
| IF | 1 A - Continuous average forward current; sets thermal design baseline for PCB copper area and ambient derating |
| trr | 150 ns - Reverse recovery time; enables stable operation in 50–100 kHz SMPS without excessive switching loss or ringing |
| VF | ≤1.2 V @ 1A, 25°C - Forward voltage drop; directly determines conduction loss (1.2W max at full load) |
| IFSM | 30 A - Peak surge current (8.3 ms half-sine); withstands inrush and fault transients in automotive 12V systems |
| RθJA | 60 °C/W - Junction-to-ambient thermal resistance; requires ≥1.5 cm² 2-oz copper pad for full 1A rating at 70°C ambient |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, glass-passivated silicon die, cathode indicated by band. Leads are pure tin-plated, J-STD-002 solderable, UL 94V-0 molded compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node) |
| Cathode | Forward current exit / reverse blocking terminal | Marked with band; ties to output rail or filter capacitor positive; blocks 400V reverse during off-cycle |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power electronics per stress test requirements (HTOL, TC, HAST, etc.) |
| Glass passivated junction | Prevents moisture-induced degradation and improves long-term reliability in humid environments |
| Low VF (≤1.2 V) | Reduces conduction loss by ~15% vs. standard 1N4007 in 1A applications, improving thermal margin |
| Fast trr (150 ns) | Minimizes reverse recovery charge (Qrr ≈ 25 nC), reducing EMI and MOSFET turn-on loss in synchronous rectification |
| RoHS & halogen-free | Complies with IEC 61249-2-21; suitable for automotive OEM and industrial green manufacturing |
Applications
| Automotive DC-DC Converters | Industrial Switching Inverters |
|---|---|
Use Scenario: 12V-to-5V/3.3V buck converter in engine control unit (ECU) with transient-heavy load profile. IC Role / Device Role / Timing Role: Output rectifier handling 1A continuous current and 30A cold-crank surges. Use Value: AEC-Q101 qualification ensures compliance with automotive qualification standards; 150ns trr prevents cross-conduction loss during high-frequency PWM switching. | Use Scenario: Auxiliary power supply in motor drive inverter, converting 300V DC bus to isolated 24V control rail. IC Role / Device Role / Timing Role: Fast recovery rectifier in flyback transformer secondary, operating at 60–80 kHz. Use Value: 400V VRRM provides 2× safety margin over 24V output reflected voltage; glass passivation sustains performance under industrial humidity and temperature cycling. |
| Consumer AC-DC Adapters | LED Driver Secondary Rectification |
Use Scenario: Compact wall adapter for smart home devices, requiring high efficiency and small footprint. IC Role / Device Role / Timing Role: Output rectifier in quasi-resonant flyback, replacing slower 1N400x series. Use Value: 1.2V VF reduces heat generation in enclosed plastic housing; DO-41 package allows manual or auto-insertion into existing PCB layouts. | Use Scenario: Constant-current LED driver for commercial lighting, where secondary-side rectification must minimize ripple and thermal rise. IC Role / Device Role / Timing Role: Primary rectifier on secondary winding of isolation transformer, delivering 1A to LED string. Use Value: Low IR (≤5 µA @ 25°C) prevents dark-current leakage that could cause LED ghosting; 150ns trr suppresses high-frequency noise coupling into sensitive current sense circuitry. |
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 = 35ns (faster), VF = 1.3V (higher), TO-220AC package | Requires heatsink for >0.5A continuous; unsuitable for space-constrained DO-41 footprints | Select when ultra-fast recovery is critical and board space allows surface-mount or larger through-hole mounting |
| ON Semi MUR1040 | 1A/400V; trr = 50ns; VF = 1.25V; DO-41 package; not AEC-Q101 qualified | Lacks automotive qualification; higher leakage (10 µA @ 25°C); same mechanical fit | Acceptable for industrial or consumer use where AEC-Q101 is not mandated; verify system-level reliability testing |
Compared with STTH1R04 and MUR1040, the BA157GH uniquely combines AEC-Q101 qualification, DO-41 form factor, and balanced trr/VF trade-off - making it the only direct-fit solution for automotive-compliant, space-limited 1A rectification without layout or thermal redesign.
Availability
BA157GH is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor drives, and consumer AC-DC adapters requiring stable component supply, AEC-Q101 compliance, and proven DO-41 reliability.
Supply support for BA157GH 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 automotive, industrial, and consumer markets since 1979.
The BA157GH belongs to TSC's AEC-Q101-qualified fast recovery rectifier family, engineered specifically for high-reliability, high-efficiency power conversion in harsh-environment automotive and industrial applications.
FAQ
What is the maximum junction temperature rating for BA157GH?
The BA157GH has a maximum junction temperature (TJ) of +150°C and a minimum of –55°C. This wide range supports operation in under-hood automotive environments and thermally demanding industrial enclosures. Derating begins above 70°C ambient, per the forward current derating curve in the official datasheet. The BA157GH maintains specified electrical parameters within this full range when mounted per recommended PCB thermal pad guidelines.
Is BA157GH pin-compatible with standard 1N400x diodes?
Yes - the BA157GH uses the DO-204AL (DO-41) package with identical mechanical dimensions and axial lead configuration as the 1N4001–1N4007 series. It can be used as a direct physical replacement in existing layouts, but offers superior performance: faster recovery (150ns vs. >2 µs), lower VF (1.2V vs. ~1.1V), and AEC-Q101 qualification absent in legacy 1N400x parts.
Does BA157GH meet RoHS and halogen-free requirements?
Yes - the BA157GH is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound contains no brominated flame retardants, and lead-free pure tin plating meets J-STD-002 solderability standards. These attributes make it suitable for automotive Tier-1 supply chains and green manufacturing initiatives requiring full material declarations.
What is the reverse recovery time (trr) specification for BA157GH?
The BA157GH 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 "ELECTRICAL SPECIFICATIONS" table of the official TSC datasheet (Version I2106). The BA157GH's trr enables clean commutation in 50–100 kHz switching power supplies without added snubbing.
How does the AEC-Q101 qualification impact BA157GH usage in automotive designs?
AEC-Q101 qualification means the BA157GH has passed accelerated stress tests including HTOL, temperature cycling, and unbiased HAST - validating its reliability for automotive power electronics. Unlike non-qualified rectifiers, the BA157GH is approved for use in ECU, ADAS, and body control modules without additional component-level qualification effort. Its DO-41 package and 150°C TJ rating further support under-hood deployment.
BA157GH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
BA157GH FAQ
1.How can I place an order for BA157GH through Aetrix?
Please submit a Request for Quotation (RFQ) for BA157GH 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 BA157GH reliable?
The price and inventory of BA157GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BA157GH is usually 5 days.
3.What payment methods are accepted for BA157GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BA157GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BA157GH?
BA157GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BA157GH 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 BA157GH?
For technical support, including BA157GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BA157GH requirements.
6.How does Aetrix verify that BA157GH is sourced from the original manufacturer or authorized distributors?
All BA157GH 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 BA157GH meets industry standards.
7.What is the process for return or replacement of BA157GH?
All BA157GH units undergo pre-shipment inspection (PSI). If there is an issue with BA157GH, 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 BA157GH part is unused and in its original packaging.
Return procedure for BA157GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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