My Inquiry
My Account
Taiwan Semiconductor Corporation SK32BHM4G
- Part No.:
- SK32BHM4G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SK32BHM4G.pdf
- Description:
- DIODE SCHOTTKY 20V 3A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,877
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SK32BHM4G from Taiwan Semiconductor is a 3A, 20V Schottky barrier surface-mount rectifier in DO-214AA (SMB) package, qualified to AEC-Q101, with 0.50 V max forward voltage at 3A/25°C, 70A surge capability, and junction temperature rating up to +125°C. It serves as a low-loss freewheeling or reverse-battery protection diode in automotive lighting and DC/DC converters.
For engineers reviewing the SK32BHM4G datasheet, SK32BHM4G pinout, SK32BHM4G application, or SK32BHM4G equivalent, key selection criteria include its 20V VRRM, 3A continuous forward current, AEC-Q101 qualification, moisture sensitivity level 1, and SMB package compatibility with automated placement.
Technical Context
The SK32BHM4G implements a single-die Schottky junction optimized for low forward voltage drop and fast switching-critical for high-frequency DC/DC conversion efficiency. Its guard ring structure provides overvoltage protection, and its matte tin-plated leads meet J-STD-002 solderability requirements.
Thermally, it features 23°C/W junction-to-lead and 63°C/W junction-to-ambient thermal resistance. With 10,000 V/μs critical dV/dt rating and 500 µA max reverse leakage at 25°C, it supports stable operation under transient stress and elevated ambient temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse blocking voltage; defines safe operating range in reverse-biased applications like reverse battery protection. |
| IF | 3 A - Continuous forward current rating; supports sustained conduction in power supply output stages without derating below 125°C. |
| VF (max) | 0.50 V @ 3A, 25°C - Low conduction loss enables >92% efficiency in 5–12 V DC/DC outputs at full load. |
| IFSM | 70 A - Non-repetitive surge current (8.3 ms half-sine); withstands inrush and fault transients in automotive systems. |
| TJ max | +125°C - Maximum junction temperature; allows operation in engine bay environments with minimal heatsinking. |
| RθJL | 23°C/W - Junction-to-lead thermal resistance; enables direct PCB copper pour thermal coupling for compact layout. |
| MSL | Level 1 per J-STD-020 - No floor life limitation; supports unlimited exposure before reflow, simplifying SMT line logistics. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount plastic case with cathode band polarity indicator, 0.100 g mass, UL 94V-0 molding compound, and JESD 201 Class 2 whisker-resistant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., ground or switch node return) in freewheeling path. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; ties to higher-potential rail (e.g., battery+, DC bus) for reverse polarity protection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-enables use in headlight modules and body control units. |
| Guard ring structure | Enhances edge termination robustness against voltage transients and localized field crowding, improving long-term reverse-bias stability. |
| Low VF (0.50 V max) | Reduces conduction loss by ~40% vs. comparable 20V Si diodes, directly lowering thermal load in space-constrained LED drivers. |
| MSL Level 1 | Eliminates bake requirements and floor-life tracking, reducing manufacturing overhead in high-mix automotive electronics assembly. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU-supports compliance reporting for Tier 1 automotive suppliers. |
Applications
| Automotive LED Lighting | 12V DC/DC Buck Converter Output |
|---|---|
Use Scenario: Reverse polarity protection in headlamp driver modules exposed to battery jump-start events and load dump transients. IC Role / Device Role / Timing Role: Unidirectional blocking element placed between battery input and downstream regulator IC. Use Value: Prevents damage from −14 V reverse connection while maintaining <0.5 V drop during normal operation, avoiding thermal runaway. | Use Scenario: Freewheeling path in synchronous buck converter supplying 5 V/3 A to infotainment MCU. IC Role / Device Role / Timing Role: Continuation path for inductor current during high-side FET off-time. Use Value: Enables >94% efficiency at 500 kHz switching with minimal voltage overshoot due to fast recovery and low stored charge. |
| Reverse Battery Protection | USB-C Power Delivery Input Stage |
Use Scenario: Input protection for vehicle telematics gateway powered from OBD-II port. IC Role / Device Role / Timing Role: Series-blocking diode on main 12 V input rail. Use Value: Withstands 70 A surge during accidental reverse connection and maintains <0.5 V drop at full 3 A load, minimizing voltage sag. | Use Scenario: Input OR-ing diode in dual-source USB-C PD design (car adapter + portable battery). IC Role / Device Role / Timing Role: Isolation element preventing backfeed between independent 5–20 V sources. Use Value: Low VF ensures minimal insertion loss across variable input voltages, preserving PD negotiation margin and thermal headroom. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB320-TB | Same 20 V VRRM, 3 A IF, but TO-277 package (3-lead, no isolation); 0.52 V VF max; not AEC-Q101 qualified. | Lacks automotive qualification and SMB footprint; requires different pad layout and lacks MSL Level 1 handling. | Prefer SK32BHM4G where AEC-Q101 compliance, tape-and-reel automation, or moisture-insensitive handling is required. |
| SS32 | 20 V VRRM, 3 A IF, SMB package, but only rated to +125°C TJ (no 150°C option); 0.55 V VF max; RoHS/halogen-free but no AEC-Q101 documentation. | Not validated for automotive stress profiles; reverse leakage at 100°C is 5 mA (vs. SK32BHM4G's 10 mA), limiting high-temp margin. | Acceptable for industrial DC/DC where qualification and extended temp margin are non-critical. |
Compared with SB320-TB and SS32, the SK32BHM4G delivers verified AEC-Q101 reliability, tighter VF spec (0.50 V), and guaranteed MSL Level 1 handling-making it the preferred choice for automotive lighting and battery-protection designs requiring zero rework risk and full traceability.
Availability
SK32BHM4G is available at Aetrix Electronics and suitable for automotive LED lighting, 12V DC/DC converter output stages, and reverse battery protection circuits requiring stable component supply, full AEC-Q101 compliance, and seamless SMT integration.
Supply support for SK32BHM4G 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 SK32BHM4G belongs to TSC's SKxBH Schottky rectifier family-engineered specifically for high-efficiency, high-reliability automotive power management, with emphasis on low VF, surge robustness, and AEC-Q101 validation.
FAQ
What is the maximum junction temperature rating for SK32BHM4G?
The SK32BHM4G has a maximum junction temperature (TJ) rating of +125°C. This rating is specified in the Absolute Maximum Ratings table and applies under continuous forward conduction conditions. The device also supports short-duration operation up to +150°C in certain test conditions, but design margins should be based on the 125°C limit for sustained reliability. Thermal design must account for RθJL = 23°C/W to ensure safe operation within this bound.
Is SK32BHM4G suitable for reverse battery protection in automotive applications?
Yes, SK32BHM4G is explicitly designed for reverse battery protection in automotive systems. Its 20 V VRRM, 70 A IFSM, AEC-Q101 qualification, and guard ring structure make it robust against jump-start transients and sustained reverse polarity. The 0.50 V forward voltage minimizes power loss and heat generation during normal operation, and the DO-214AA (SMB) package supports high-density PCB layouts typical in modern ECUs and lighting modules.
Does SK32BHM4G have a halogen-free and RoHS-compliant construction?
Yes, SK32BHM4G meets both RoHS Directive 2011/65/EU and IEC 61249-2-21 halogen-free requirements. The molding compound, lead finish, and internal materials are fully documented as halogen-free, and the device carries appropriate compliance markings. This supports environmental compliance reporting for automotive Tier 1 suppliers and aligns with global sustainability mandates without compromising electrical performance.
What is the moisture sensitivity level (MSL) of SK32BHM4G, and how does it affect handling?
SK32BHM4G is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and requires no dry pack or baking prior to reflow soldering. This eliminates moisture-related popcorning risks and simplifies SMT line logistics-especially valuable in high-throughput automotive electronics manufacturing where traceability and process consistency are critical. The qualification is verified through standardized preconditioning tests.
How does the forward voltage of SK32BHM4G compare to other 20V Schottky rectifiers in SMB package?
SK32BHM4G specifies a maximum forward voltage of 0.50 V at 3 A and 25°C-tighter than many competing 20V SMB Schottkys (e.g., SS32: 0.55 V, SB320-TB: 0.52 V). This 50 mV advantage reduces conduction loss by ~150 mW at full load, directly improving thermal margin and system efficiency in space-constrained applications like LED drivers and DC/DC outputs where every milliwatt matters.
SK32BHM4G 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):
- 20 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 20 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
SK32BHM4G FAQ
1.How can I place an order for SK32BHM4G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK32BHM4G 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 SK32BHM4G reliable?
The price and inventory of SK32BHM4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK32BHM4G is usually 5 days.
3.What payment methods are accepted for SK32BHM4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK32BHM4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK32BHM4G?
SK32BHM4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK32BHM4G 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 SK32BHM4G?
For technical support, including SK32BHM4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK32BHM4G requirements.
6.How does Aetrix verify that SK32BHM4G is sourced from the original manufacturer or authorized distributors?
All SK32BHM4G 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 SK32BHM4G meets industry standards.
7.What is the process for return or replacement of SK32BHM4G?
All SK32BHM4G units undergo pre-shipment inspection (PSI). If there is an issue with SK32BHM4G, 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 SK32BHM4G part is unused and in its original packaging.
Return procedure for SK32BHM4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SK32BHM4G 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…
