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Taiwan Semiconductor Corporation SK39BHR5G
- Part No.:
- SK39BHR5G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK39BHR5G.pdf
- Description:
- DIODE SCHOTTKY 90V 3A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,744
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Product details
Overview
SK39BHR5G from Taiwan Semiconductor is a 3A, 90V Schottky barrier rectifier in DO-214AA (SMB) package, designed for low-loss freewheeling and reverse battery protection in automotive lighting and DC/DC converters. It features AEC-Q101 qualification, 0.85V max forward voltage at 3A/25°C, 70A non-repetitive surge capability, and guard-ring overvoltage protection.
For engineers reviewing the SK39BHR5G datasheet, SK39BHR5G pinout, SK39BHR5G application, or SK39BHR5G equivalent, key selection criteria include its 90V VRRM, 125°C/150°C junction temperature range, moisture sensitivity level 1 rating, and compatibility with automated SMT placement per J-STD-002.
Technical Context
This discrete Schottky diode uses a single-die construction optimized for high-frequency switching in low-voltage power conversion. Its low forward voltage drop and fast recovery enable high-efficiency operation in buck converters and flyback snubbers where conduction loss minimization is critical.
The device's guard ring structure enhances ruggedness against transient overvoltage events, while its DO-214AA thermal design supports 23°C/W junction-to-lead resistance-enabling reliable 3A continuous operation without forced cooling in ambient temperatures up to 85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 90 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in reverse-biased applications like reverse polarity protection. |
| IF | 3 A - Continuous forward current rating; supports stable DC/DC output stage or freewheeling path without derating below 85°C ambient. |
| VF (max) | 0.85 V @ 3A, 25°C - Low conduction loss enables >92% efficiency in 5–12V output converters at full load. |
| IFSM | 70 A - Peak surge current handling for 8.3ms half-sine; withstands inrush during hot-plug or load dump transients. |
| TJ max | 125°C / 150°C - Dual-rated junction temperature; allows extended operation in under-hood automotive environments with thermal margin. |
| RθJL | 23 °C/W - Junction-to-lead thermal resistance; enables direct PCB copper pour heat sinking without heatsink for 3A steady-state use. |
| IR (max) | 100 µA @ 90V, 25°C - Low leakage preserves battery life in always-on reverse protection circuits. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount plastic case with matte tin-plated leads, cathode indicated by band, weight ≈0.100g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/source side in rectification or freewheeling paths; requires adequate copper area for thermal dissipation. |
| Cathode | Forward current exit / reverse voltage reference | Marked by band; ties to ground or return node; must maintain clean layout to minimize parasitic inductance in high-di/dt switching. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-suitable for under-hood lighting and body control modules. |
| Guard ring structure | Enhances edge termination robustness, raising dV/dt rating to 10,000 V/µs and improving immunity to voltage transients in noisy automotive systems. |
| Moisture sensitivity level 1 | Zero bake requirement before reflow; compatible with standard SMT assembly lines without dry-pack or floor-life constraints. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives-enables compliance in global automotive and industrial end products. |
Applications
| Automotive LED Lighting | DC/DC Converter Freewheeling |
|---|---|
Use Scenario: Reverse polarity protection and EMI suppression in 12V/24V LED headlamp drivers. IC Role / Device Role / Timing Role: Discrete Schottky diode used as reverse-battery clamp and freewheeling path during MOSFET turn-off. Use Value: 0.85V VF minimizes power loss and thermal rise in compact lamp housings; AEC-Q101 ensures 15-year field reliability. | Use Scenario: Output rectification in synchronous and non-synchronous buck converters for infotainment power rails. IC Role / Device Role / Timing Role: Freewheeling diode conducting during high-side switch off-time to maintain inductor current continuity. Use Value: Fast recovery and low VF reduce switching losses and improve light-load efficiency versus standard PN diodes. |
| Reverse Battery Protection | Industrial Power Supply Input Stage |
Use Scenario: Preventing damage from accidental battery terminal reversal in vehicle accessory modules. IC Role / Device Role / Timing Role: Series-connected Schottky placed between battery input and system regulator to block reverse current. Use Value: 90V VRRM accommodates load dump spikes up to 87V; 100µA leakage avoids standby current drain. | Use Scenario: Input-stage OR-ing and hold-up in 24V industrial PLC power supplies. IC Role / Device Role / Timing Role: Discrete rectifier enabling redundant input sourcing or backup capacitor discharge control. Use Value: 70A IFSM handles capacitor inrush; DO-214AA footprint allows high-density layout with minimal board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-3EYH09-M3/45 | Same 90V VRRM, 3A IF, DO-214AA package; VF = 0.82V typ @ 3A but not AEC-Q101 qualified. | Lacks automotive qualification; suitable for industrial/commercial DC/DC but not under-hood automotive use. | Select when AEC-Q101 is not required and lower typical VF is prioritized over qualification. |
| ON Semiconductor SB390 | 90V VRRM, 3A IF, DO-214AA; VF = 0.87V max @ 3A, 25°C; AEC-Q101 qualified but higher leakage (200µA @ 90V). | Higher IR reduces battery hold-up time in always-on reverse protection circuits. | Prefer when broader supply chain availability is needed, accepting slightly higher leakage and VF. |
Compared with VS-3EYH09-M3/45 and SB390, SK39BHR5G delivers tighter VF consistency (0.85V max), lower leakage (100µA), and verified AEC-Q101 compliance-making it optimal for space-constrained, thermally demanding automotive lighting and power modules where qualification and parametric stability are mandatory.
Availability
SK39BHR5G is available at Aetrix Electronics and suitable for automotive LED lighting, DC/DC converter freewheeling, and reverse battery protection requiring stable component supply across production lifecycles.
Supply support for SK39BHR5G 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 Company (TSC) is a vertically integrated Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers for automotive and industrial markets.
The SK3xBH series was developed specifically for AEC-Q101-compliant, high-reliability Schottky rectification in automotive power systems-emphasizing low VF, surge robustness, and SMT manufacturability.
FAQ
What is the maximum junction temperature rating for SK39BHR5G?
The SK39BHR5G has dual-rated maximum junction temperature: 125°C for standard operation and 150°C for extended thermal margin applications. This allows sustained 3A conduction in high-ambient environments such as engine compartments when properly heatsinked via PCB copper pour, leveraging its 23°C/W RθJL.
Is SK39BHR5G suitable for reverse battery protection in 24V automotive systems?
Yes, SK39BHR5G is rated for 90V VRRM, exceeding typical 24V system load dump spikes (up to ~87V), and is AEC-Q101 qualified for automotive use. Its 100µA reverse leakage at 90V/25°C ensures minimal standby current drain-critical for always-on modules like telematics or lighting controllers.
Does SK39BHR5G have a halogen-free and RoHS-compliant construction?
Yes, SK39BHR5G meets IEC 61249-2-21 for halogen-free materials and is fully RoHS compliant. The molding compound is UL 94V-0 rated, and terminals are matte tin plated per J-STD-002-ensuring environmental compliance and solderability in lead-free reflow processes.
What is the surge current rating of SK39BHR5G and how is it tested?
SK39BHR5G supports 70A peak forward surge current (IFSM) for an 8.3ms single half-sine wave superimposed on rated load. This rating is validated per JEDEC standards and enables reliable handling of capacitor inrush and load dump transients without degradation in automotive and industrial power designs.
How does the guard ring feature benefit SK39BHR5G in real-world applications?
The guard ring in SK39BHR5G improves edge termination ruggedness, raising its critical dV/dt rating to 10,000 V/µs. This directly enhances immunity to fast-rising transients in automotive CAN/LIN networks and switching power supplies-reducing risk of premature breakdown during ESD or load dump events.
SK39BHR5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 90 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 850 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 90 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK39BHR5G FAQ
1.How can I place an order for SK39BHR5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK39BHR5G 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 SK39BHR5G reliable?
The price and inventory of SK39BHR5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK39BHR5G is usually 5 days.
3.What payment methods are accepted for SK39BHR5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK39BHR5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK39BHR5G?
SK39BHR5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK39BHR5G 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 SK39BHR5G?
For technical support, including SK39BHR5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK39BHR5G requirements.
6.How does Aetrix verify that SK39BHR5G is sourced from the original manufacturer or authorized distributors?
All SK39BHR5G 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 SK39BHR5G meets industry standards.
7.What is the process for return or replacement of SK39BHR5G?
All SK39BHR5G units undergo pre-shipment inspection (PSI). If there is an issue with SK39BHR5G, 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 SK39BHR5G part is unused and in its original packaging.
Return procedure for SK39BHR5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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