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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation BA158G-K

Name: BA158G-K
Brand: Taiwan Semiconductor Corporation
SKU: BA158G-K
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BA158G-K

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: BA158G-K.pdf

Description:: 500NS, 1A, 600V, FAST RECOVERY R

Quantity:: RFQ Add To RFQ list

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Inventory:6,892

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Product details

Overview

BA158G-K from Taiwan Semiconductor is a 1A, 600V fast recovery rectifier diode in DO-204AL (DO-41) package, featuring 500 ns reverse recovery time, 1.3 V forward voltage at 1 A, and 30 A surge current capability. It serves as a primary-side output rectifier in offline SMPS and DC-DC converters requiring high efficiency and thermal robustness.

For engineers reviewing the BA158G-K datasheet, BA158G-K pinout, BA158G-K application, or BA158G-K equivalent, key selection criteria include verified V_RRM = 600 V, trr ≤ 500 ns, R_θJA = 60 °C/W, cathode-band polarity marking, and RoHS/halogen-free compliance for industrial power supply designs.

Technical Context

This single-die, glass-passivated silicon rectifier operates with a maximum junction temperature of 150 °C and supports repetitive peak reverse voltages up to 600 V. Its fast recovery characteristic (trr ≤ 500 ns) enables efficient switching in 50–100 kHz SMPS topologies without excessive switching loss.

The device exhibits low forward voltage drop (V_F ≤ 1.3 V @ 1 A, 25 °C) and low leakage (I_R ≤ 5 µA @ 25 °C, rated V_R), supported by a junction-to-ambient thermal resistance of 60 °C/W in standard PCB mounting per JESD22-A104.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	600 V - Maximum non-repetitive reverse blocking voltage; defines safe operating margin in 400 VAC input rectification.
I_F	1 A continuous - Rated average forward current at 75 °C ambient; derates linearly to zero at 150 °C junction.
I_FSM	30 A - Peak non-repetitive surge current (8.3 ms half-sine); withstands cold-start inrush in AC/DC adapters.
t_rr	≤ 500 ns - Measured at I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A; enables high-frequency operation with minimal switching loss.
V_F	≤ 1.3 V @ 1 A, 25 °C - Low conduction loss improves system efficiency; pulse-tested (0.3 ms PW).
R_θJA	60 °C/W - Thermal resistance from junction to ambient on standard FR-4 PCB; determines heatsinking requirements.

Pinout & Package

Package: DO-204AL (DO-41), axial leaded, glass-passivated silicon die, cathode indicated by band. Weight: 0.330 g. Leads are pure tin-plated, solderable per J-STD-002, and pass JESD201 Class 1A whisker test.

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 return) in bridge or half-wave configuration.
Cathode	Forward current exit / reverse blocking terminal	Marked with band; connects to output filter capacitor positive rail; blocks reverse voltage up to 600 V.

Key Features

Feature	Design Value
Glass passivated junction	Enhances moisture resistance and long-term reliability under humid industrial environments.
Low V_F (≤1.3 V)	Reduces conduction loss by ~15% vs. standard 1N4007 in 1 A applications, improving thermal margin.
Fast t_rr (≤500 ns)	Minimizes reverse recovery charge (Q_rr) in flyback and forward converters, lowering EMI and MOSFET stress.
RoHS & halogen-free	Complies with IEC 61249-2-21; eliminates brominated flame retardants for safer end-of-life processing.

Applications

AC/DC Power Adapters	Industrial SMPS
Use Scenario: 12 V/1 A wall adapter for IoT gateways with universal AC input (90–264 VAC). IC Role / Device Role / Timing Role: Output rectifier in DCM flyback converter, conducting during transformer reset phase. Use Value: 600 V V_RRM provides 2× safety margin over 375 VDC peak input; 500 ns t_rr limits switching loss at 65 kHz.	Use Scenario: 24 V/0.8 A auxiliary supply in PLC backplane with 300 VDC bus. IC Role / Device Role / Timing Role: Primary-side snubber clamp diode and secondary-side freewheeling path in forward converter. Use Value: 30 A I_FSM handles transient overloads; 150 °C T_JMAX ensures operation in sealed enclosures at 70 °C ambient.
DC-DC Buck Converters	LED Driver Secondary Rectification
Use Scenario: 5 V/1 A isolated buck-derived supply for sensor interface in factory automation. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in low-cost non-synchronous design. Use Value: 1.3 V V_F yields <1.3 W conduction loss at full load; DO-41 footprint simplifies layout vs. SMD alternatives.	Use Scenario: Constant-current LED driver for street lighting with 36 V output string. IC Role / Device Role / Timing Role: Output rectifier in quasi-resonant flyback stage feeding bulk capacitor. Use Value: 60 °C/W R_θJA allows natural convection cooling; cathode band ensures correct polarity in high-volume automated assembly.

AC/DC Power Adapters

Industrial SMPS

Use Scenario: 12 V/1 A wall adapter for IoT gateways with universal AC input (90–264 VAC).

IC Role / Device Role / Timing Role: Output rectifier in DCM flyback converter, conducting during transformer reset phase.

Use Value: 600 V V_RRM provides 2× safety margin over 375 VDC peak input; 500 ns t_rr limits switching loss at 65 kHz.

Use Scenario: 24 V/0.8 A auxiliary supply in PLC backplane with 300 VDC bus.

IC Role / Device Role / Timing Role: Primary-side snubber clamp diode and secondary-side freewheeling path in forward converter.

Use Value: 30 A I_FSM handles transient overloads; 150 °C T_JMAX ensures operation in sealed enclosures at 70 °C ambient.

DC-DC Buck Converters

LED Driver Secondary Rectification

Use Scenario: 5 V/1 A isolated buck-derived supply for sensor interface in factory automation.

IC Role / Device Role / Timing Role: Synchronous rectifier replacement in low-cost non-synchronous design.

Use Value: 1.3 V V_F yields <1.3 W conduction loss at full load; DO-41 footprint simplifies layout vs. SMD alternatives.

Use Scenario: Constant-current LED driver for street lighting with 36 V output string.

IC Role / Device Role / Timing Role: Output rectifier in quasi-resonant flyback stage feeding bulk capacitor.

Use Value: 60 °C/W R_θJA allows natural convection cooling; cathode band ensures correct polarity in high-volume automated assembly.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast recovery rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	V_RRM = 600 V, t_rr = 45 ns, V_F = 1.15 V @ 1 A - faster but higher cost and smaller package (SOD-123FL).	Preferred in space-constrained, high-frequency (>200 kHz) designs where ultra-low Q_rr is critical.	Select STTH1R06 only when board area and trr < 100 ns are mandatory; BA158G-K offers better surge robustness and through-hole assembly compatibility.
1N4937G	V_RRM = 600 V, t_rr = 200 ns, V_F = 1.2 V @ 1 A - faster than BA158G-K but lacks halogen-free certification and JESD201 whisker rating.	Suitable for cost-sensitive consumer adapters where regulatory compliance is less stringent.	Choose 1N4937G for legacy designs with existing qualification; BA158G-K adds reliability assurance for industrial deployments.

Compared with STTH1R06 and 1N4937G, BA158G-K delivers balanced performance: superior surge immunity (30 A vs. 25 A/15 A), proven DO-41 mechanical robustness, and full environmental compliance-making it optimal for mid-frequency industrial power supplies where reliability outweighs marginal speed gains.

Availability

BA158G-K is available at Aetrix Electronics and suitable for AC/DC adapters, industrial SMPS, DC-DC converters, and LED driver secondary rectification requiring stable component supply across production lifecycles.

Supply support for BA158G-K 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 BA15xG-K series is part of TSC's high-reliability rectifier product line, engineered specifically for cost-effective, thermally robust AC/DC and DC/DC power conversion in harsh ambient conditions.

FAQ

What is the maximum junction temperature rating for BA158G-K?

The BA158G-K has a maximum junction temperature (T_JMAX) of +150 °C, validated per absolute maximum ratings table. This allows reliable operation in enclosed industrial power supplies where ambient temperatures reach 70–85 °C, provided thermal design maintains junction temperature below this limit using the specified R_θJA = 60 °C/W.

Does BA158G-K support lead-free soldering processes?

Yes, BA158G-K features pure tin-plated leads compliant with J-STD-002 for solderability, and its molding compound meets UL 94V-0 flammability rating. The device is qualified for lead-free reflow profiles up to 260 °C peak, with no degradation in electrical or mechanical performance.

How is polarity marked on BA158G-K?

BA158G-K uses a cathode band marking on the body to indicate polarity - the banded end is the cathode terminal. This aligns with industry-standard DO-41 orientation and ensures correct placement during manual or automated assembly in bridge rectifiers or flyback output stages.

What is the reverse recovery time test condition for BA158G-K?

The BA158G-K reverse recovery time (t_rr) is measured at I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, per the manufacturer's electrical specifications table. This standardized condition ensures consistent comparison with other fast recovery rectifiers in power supply design validation.

Is BA158G-K halogen-free and RoHS compliant?

Yes, BA158G-K is both RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants, and all materials meet EU Directive 2011/65/EU requirements - confirmed in the official Taiwan Semiconductor datasheet revision B2104.

BA158G-K 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):: 600 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.3 V @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 500 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 600 V

Capacitance @ Vr, F:: 15pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AL (DO-41)

Operating Temperature - Junction:: 150°C

BA158G-K FAQ

1.How can I place an order for BA158G-K through Aetrix?

Please submit a Request for Quotation (RFQ) for BA158G-K 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 BA158G-K reliable?

The price and inventory of BA158G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BA158G-K is usually 5 days.

3.What payment methods are accepted for BA158G-K?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BA158G-K transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BA158G-K?

BA158G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BA158G-K 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 BA158G-K?

For technical support, including BA158G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BA158G-K requirements.

6.How does Aetrix verify that BA158G-K is sourced from the original manufacturer or authorized distributors?

All BA158G-K 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 BA158G-K meets industry standards.

7.What is the process for return or replacement of BA158G-K?

All BA158G-K units undergo pre-shipment inspection (PSI). If there is an issue with BA158G-K, 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 BA158G-K part is unused and in its original packaging.

Return procedure for BA158G-K:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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