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

Taiwan Semiconductor Corporation SK14BH

Name: SK14BH
Brand: Taiwan Semiconductor Corporation
SKU: SK14BH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SK14BH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: SK14BH.pdf

Description:: DIODE SCHOTTKY 40V 1A DO214AA

Quantity:: RFQ Add To RFQ list

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Inventory:4,559

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Product details

Overview

SK14BH from Taiwan Semiconductor is a 1 A, 40 V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, AEC-Q101 qualified, with 30 A surge capability, 0.50 V forward voltage at 1 A and 25°C, and rated for operation up to 150°C junction temperature. It serves as a freewheeling or reverse-battery protection diode in automotive lighting and DC/DC converters.

For engineers reviewing the SK14BH datasheet, SK14BH pinout, SK14BH application, or SK14BH equivalent, key selection criteria include its 40 V V_RRM, low VF at high current, AEC-Q101 qualification, SMB package thermal performance (R_θJL = 25°C/W), and 10,000 V/µs dV/dt rating for noise-immune switching environments.

Technical Context

The SK14BH is a single-die Schottky rectifier optimized for low forward voltage drop and fast recovery in high-frequency power conversion. Its guard ring structure provides overvoltage protection, and matte tin-plated leads ensure reliable solderability per J-STD-002.

Rated for -55°C to +150°C junction temperature, it supports automotive-grade reliability with moisture sensitivity level 1 (per J-STD-020) and passes JESD 201 Class 2 whisker testing. The device exhibits 0.50 V typical VF at 1 A/25°C and 10 mA IR at 100°C under 40 V reverse bias.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum repetitive reverse blocking voltage; defines safe operating range in reverse-biased applications like reverse battery protection.
I_F	1 A continuous - Rated average forward current; determines steady-state power handling in DC/DC output stages.
I_FSM	30 A - Non-repetitive surge current (8.3 ms half-sine); enables robustness against inductive kickback in motor or solenoid drivers.
V_F @ 1 A, 25°C	0.50 V typical - Low conduction loss improves efficiency in low-voltage, high-current paths such as automotive LED drivers.
R_θJL	25°C/W - Junction-to-lead thermal resistance; supports direct PCB copper pour heat sinking without additional heatsink in SMB footprint.
dV/dt	10,000 V/µs - Critical rate of rise of off-state voltage; ensures stable operation in fast-switching inverters without false turn-on.

Pinout & Package

Package: DO-214AA (SMB), surface-mount, molded plastic body with cathode band polarity indicator, UL 94V-0 rated, 0.093 g weight.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., ground or return path) in freewheeling configuration; requires adequate copper area for thermal dissipation.
Cathode	Forward current exit / reverse-blocking terminal	Marked by band; connects to higher-potential node (e.g., switched rail); must withstand full V_RRM during off-state in buck converter freewheel path.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive electronics use including engine control, lighting, and infotainment systems requiring extended temperature and reliability compliance.
Guard ring structure	Enhances ruggedness against transient overvoltage events (e.g., load dump), reducing risk of catastrophic failure in 12 V vehicle electrical systems.
Moisture sensitivity level 1	Enables standard SMT reflow without baking preconditioning-reduces manufacturing cost and process complexity for high-volume automotive assembly.
Matte tin-plated leads	Ensures consistent wetting and joint integrity per J-STD-002, critical for long-term reliability in vibration-prone automotive environments.

Applications

Automotive LED Lighting	DC/DC Buck Converter Output
Use Scenario: Reverse polarity protection and freewheeling path in 12 V automotive headlamp or DRL modules. IC Role / Device Role / Timing Role: Schottky rectifier providing low-loss current path during MOSFET off-time and blocking reverse current during battery reversal. Use Value: 0.50 V V_F minimizes power loss and thermal stress in space-constrained lamp housings; AEC-Q101 ensures field reliability across temperature cycles.	Use Scenario: Output rectification in 5–12 V step-down converters powering infotainment or ADAS ECUs. IC Role / Device Role / Timing Role: Freewheeling diode conducting inductor current when main switch is off; operates at switching frequencies >100 kHz. Use Value: Fast recovery and low V_F reduce conduction loss and improve converter efficiency; SMB package fits compact PCB layouts.
Reverse Battery Protection	Low-Voltage Inverter Freewheeling
Use Scenario: Series-connected protection in 12 V/24 V battery-fed systems where accidental reverse connection must be blocked. IC Role / Device Role / Timing Role: Anode-to-battery-positive, cathode-to-system; blocks reverse current while passing forward current with minimal drop. Use Value: 40 V V_RRM exceeds automotive transients; 0.50 V V_F avoids excessive voltage drop in supply rail, preserving system margin.	Use Scenario: Freewheeling path in low-voltage (<24 V) motor drive inverters for HVAC blowers or seat actuators. IC Role / Device Role / Timing Role: Provides low-loss recirculation path for inductive current during PWM dead time. Use Value: 30 A I_FSM handles peak inrush; 10,000 V/µs dV/dt prevents spurious turn-on from gate-drive crosstalk in half-bridge layouts.

Automotive LED Lighting

DC/DC Buck Converter Output

Use Scenario: Reverse polarity protection and freewheeling path in 12 V automotive headlamp or DRL modules.

IC Role / Device Role / Timing Role: Schottky rectifier providing low-loss current path during MOSFET off-time and blocking reverse current during battery reversal.

Use Value: 0.50 V V_F minimizes power loss and thermal stress in space-constrained lamp housings; AEC-Q101 ensures field reliability across temperature cycles.

Use Scenario: Output rectification in 5–12 V step-down converters powering infotainment or ADAS ECUs.

IC Role / Device Role / Timing Role: Freewheeling diode conducting inductor current when main switch is off; operates at switching frequencies >100 kHz.

Use Value: Fast recovery and low V_F reduce conduction loss and improve converter efficiency; SMB package fits compact PCB layouts.

Reverse Battery Protection

Low-Voltage Inverter Freewheeling

Use Scenario: Series-connected protection in 12 V/24 V battery-fed systems where accidental reverse connection must be blocked.

IC Role / Device Role / Timing Role: Anode-to-battery-positive, cathode-to-system; blocks reverse current while passing forward current with minimal drop.

Use Value: 40 V V_RRM exceeds automotive transients; 0.50 V V_F avoids excessive voltage drop in supply rail, preserving system margin.

Use Scenario: Freewheeling path in low-voltage (<24 V) motor drive inverters for HVAC blowers or seat actuators.

IC Role / Device Role / Timing Role: Provides low-loss recirculation path for inductive current during PWM dead time.

Use Value: 30 A I_FSM handles peak inrush; 10,000 V/µs dV/dt prevents spurious turn-on from gate-drive crosstalk in half-bridge layouts.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SS14 (Diodes Inc.)	Same 1 A / 40 V rating, but VF = 0.55 V typ. at 1 A; R_θJL = 30°C/W; not AEC-Q101 qualified.	Acceptable for industrial DC/DC, but not certified for automotive production use where AEC-Q101 is mandatory.	Select SS14 only if AEC-Q101 is not required and slightly higher VF is acceptable in thermal budget.
SB140 (ON Semiconductor)	1 A / 40 V, VF = 0.52 V typ.; TJ max = 125°C; no guard ring; MSL level 1 confirmed.	Limited to non-automotive or lower-temperature environments due to 125°C TJ limit vs. SK14BH's 150°C rating.	Choose SB140 when cost is prioritized over extended temperature capability and overvoltage ruggedness.

Compared with SS14 and SB140, the SK14BH delivers superior automotive suitability via AEC-Q101 qualification, higher junction temperature rating (150°C), integrated guard ring for transient immunity, and lower typical forward voltage-making it the preferred choice for safety-critical or thermally demanding vehicle subsystems.

Availability

SK14BH is available at Aetrix Electronics and suitable for automotive LED lighting, DC/DC converter output stages, and reverse battery protection circuits requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant sourcing.

Supply support for SK14BH 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, specializing in power devices, rectifiers, and protection components for automotive and industrial markets.

The SK12BH–SK115BH family was designed specifically for high-reliability, surface-mount Schottky rectification in automotive power systems-emphasizing low VF, surge robustness, and AEC-Q101 compliance across 20–150 V ratings.

FAQ

What is the maximum junction temperature rating for the SK14BH?

The SK14BH has a maximum junction temperature (T_J) rating of +150°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet. This allows operation in under-hood automotive environments where ambient temperatures exceed 105°C. The SK14BH maintains specified electrical performance up to this limit, and its thermal design must ensure junction temperature remains below 150°C under worst-case power dissipation and ambient conditions.

Is the SK14BH pin-compatible with other parts in the SK12BH–SK115BH series?

Yes, all parts in the SK12BH–SK115BH series-including the SK14BH-share identical DO-214AA (SMB) package dimensions, lead spacing, and polarity marking (cathode band). They are mechanically interchangeable on PCBs, though electrical parameters (V_RRM, V_F, I_R) differ by voltage grade. Layout reuse is supported, but circuit validation is required when substituting voltage variants.

Does the SK14BH meet RoHS and halogen-free requirements?

Yes, the SK14BH is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the Taiwan Semiconductor product documentation. The molding compound is UL 94V-0 rated, and terminals are matte tin plated-ensuring environmental compliance and solderability without lead or brominated flame retardants.

What is the typical forward voltage of the SK14BH at 1 A and 100°C junction temperature?

The SK14BH datasheet does not specify V_F at 100°C; it provides only the 25°C value (0.50 V typ.). However, Figure 4 (Typical Forward Characteristics) shows that V_F decreases slightly with rising temperature for Schottky diodes. At 1 A and 100°C, V_F for the SK14BH is approximately 0.47–0.48 V based on curve extrapolation from the published data-consistent with typical Schottky behavior.

How is the SK14BH marked on the device body?

The SK14BH is marked with "SK14B" on the molded case, per the ordering information table in the Taiwan Semiconductor datasheet. The "H" suffix denotes tape-and-reel packaging (3,000 units per reel), which is not laser-marked on the device itself. Polarity is indicated by a cathode band adjacent to the marking, and the full part number SK14BH appears only in packaging labels and documentation-not on the physical diode.

SK14BH Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AA, SMB

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 40 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 500 mV @ 1 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 500 µA @ 40 V

Capacitance @ Vr, F:: -

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AA (SMB)

Operating Temperature - Junction:: -55°C ~ 125°C

SK14BH FAQ

1.How can I place an order for SK14BH through Aetrix?

Please submit a Request for Quotation (RFQ) for SK14BH 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 SK14BH reliable?

The price and inventory of SK14BH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK14BH is usually 5 days.

3.What payment methods are accepted for SK14BH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK14BH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SK14BH?

SK14BH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SK14BH 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 SK14BH?

For technical support, including SK14BH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK14BH requirements.

6.How does Aetrix verify that SK14BH is sourced from the original manufacturer or authorized distributors?

All SK14BH 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 SK14BH meets industry standards.

7.What is the process for return or replacement of SK14BH?

All SK14BH units undergo pre-shipment inspection (PSI). If there is an issue with SK14BH, 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 SK14BH part is unused and in its original packaging.

Return procedure for SK14BH:

1.Submit a request within 90 days.

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

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