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Taiwan Semiconductor Corporation SK33AHR3G
- Part No.:
- SK33AHR3G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SK33AHR3G.pdf
- Description:
- DIODE SCHOTTKY 30V 3A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,184
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Product details
Overview
SK33AHR3G from Taiwan Semiconductor is a 3A, 30V AEC-Q101-qualified Schottky barrier rectifier in DO-214AC (SMA) package, featuring low forward voltage (0.55 V at 3 A, 25°C), high surge current capability (70 A), and guard ring over-voltage protection - used in automotive DC/DC converters and reverse battery protection circuits.
For engineers reviewing the SK33AHR3G datasheet, SK33AHR3G pinout, SK33AHR3G application, or SK33AHR3G equivalent, key selection criteria include its 30 V repetitive peak reverse voltage, 150°C maximum junction temperature, moisture sensitivity level 1 rating, and RoHS/halogen-free compliance for automotive-grade power conversion designs.
Technical Context
This discrete Schottky diode uses a single-die construction with platinum-silicide or similar low-barrier metallization to achieve fast switching and minimal reverse recovery charge. Its 10,000 V/µs critical dV/dt rating supports stable operation in high-frequency switching environments such as synchronous rectification stages.
The device's thermal design centers on low junction-to-lead resistance (25°C/W) and 66°C/W junction-to-ambient resistance, enabling sustained 3 A conduction without forced airflow in compact automotive PCB layouts. Polarity is unambiguously indicated by a cathode band per JEDEC DO-214AC mechanical standard.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum non-repetitive reverse blocking voltage; defines safe operating range in 12 V automotive systems with load dump transients. |
| IF | 3 A continuous - Rated average forward current at case temperature ≤ 75°C; supports compact heatsinking in space-constrained modules. |
| VF | 0.55 V @ 3 A, 25°C - Low conduction loss reduces power dissipation by >30% vs. standard PN diodes, improving DC/DC efficiency. |
| IFSM | 70 A @ 8.3 ms half-sine - Withstands high-energy inrush and fault currents during cold-cranking or short-circuit events. |
| TJ max | 150°C - Enables reliable operation under hood temperatures up to 125°C ambient with margin for self-heating. |
| RθJL | 25°C/W - Enables direct thermal coupling to copper pour or metal-core PCB for passive thermal management. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, matte tin-plated leads, polarity marked by cathode band, weight ≈ 0.070 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., ground or switch-node return); requires adequate copper area for thermal relief. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by visible band; connects to positive rail or output node; must maintain creepage distance per automotive isolation requirements. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Guard ring structure | Prevents premature edge breakdown under transient overvoltage, increasing reliability in 12 V/24 V battery systems. |
| Moisture sensitivity level 1 | Zero bake requirement before reflow; compatible with standard SMT assembly lines without dry-pack handling. |
| RoHS & halogen-free | Meets EU Directive 2011/65/EU and IEC 61249-2-21, supporting end-of-life recycling and flame-retardant board design. |
Applications
| Automotive DC/DC Converters | Reverse Battery Protection |
|---|---|
Use Scenario: Step-down conversion from 12 V battery to 3.3 V/5 V rails in infotainment ECUs and ADAS sensors. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck topology, conducting during low-side switch off-time. Use Value: 0.55 V forward drop minimizes conduction loss at 3 A, directly improving converter efficiency and reducing thermal load on adjacent ICs. | Use Scenario: Preventing damage when jumper cables are incorrectly connected to vehicle battery terminals. IC Role / Device Role / Timing Role: Series-connected anode-to-load, cathode-to-battery+; blocks reverse current flow during polarity reversal. Use Value: 70 A surge rating withstands momentary reverse connection energy without failure, meeting ISO 16750-2 pulse 4 requirements. |
| Car Lighting Drivers | Freewheeling Diodes in Motor Control |
Use Scenario: LED headlamp drivers with PWM dimming and thermal foldback protection. IC Role / Device Role / Timing Role: Freewheel path for inductive current during MOSFET turn-off in boost or buck-boost LED controllers. Use Value: Fast recovery and low Qrr reduce switching losses and EMI generation during 100–500 kHz PWM operation. | Use Scenario: 12 V wiper or HVAC blower motor control modules with H-bridge or single-FET drive. IC Role / Device Role / Timing Role: Clamp inductive kickback across motor windings during FET commutation. Use Value: 10,000 V/µs dV/dt rating ensures stable blocking behavior during rapid voltage transitions, preventing false turn-on. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB330-TB | Same 30 V VRRM, 3 A IF, but VF = 0.52 V typical; slightly lower RθJA (60°C/W); no AEC-Q101 claim. | Not qualified for automotive use; suitable for industrial or consumer DC/DC where qualification is not mandated. | Select SB330-TB only if AEC-Q101 is not required and marginally lower VF justifies sourcing change. |
| SS33HE3/57T | Identical VRRM, IF, VF (0.55 V), and DO-214AC package; AEC-Q101 qualified; IR = 500 µA @ 25°C (same as SK33AHR3G). | Direct functional match with same thermal and electrical specs; validated in identical automotive reference designs. | SS33HE3/57T offers second-source availability with identical performance and qualification - ideal for supply chain diversification. |
Compared with SB330-TB and SS33HE3/57T, SK33AHR3G provides guaranteed AEC-Q101 compliance and documented 150°C junction rating, making it the preferred choice for safety-critical automotive subsystems where qualification traceability and thermal margin are mandatory.
Availability
SK33AHR3G is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse battery protection circuits, and car lighting drivers requiring stable component supply across production lifecycles.
Supply support for SK33AHR3G 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The SK3xAH series was developed specifically for AEC-Q101-compliant automotive power rectification, emphasizing robustness under thermal cycling, high surge tolerance, and compatibility with automated SMT assembly lines.
FAQ
What is the maximum junction temperature rating for SK33AHR3G?
The SK33AHR3G has a maximum junction temperature (TJ) of +150°C, verified per AEC-Q101 stress testing. This allows operation in under-hood environments up to 125°C ambient with sufficient thermal design margin. The device's 25°C/W junction-to-lead thermal resistance enables effective heat transfer to PCB copper when mounted per recommended pad layout.
Is SK33AHR3G suitable for reverse battery protection in 12 V automotive systems?
Yes, SK33AHR3G is explicitly designed for reverse battery protection. Its 30 V VRRM, 70 A IFSM, and AEC-Q101 qualification ensure robust performance during incorrect jump-start events. The guard ring structure prevents edge breakdown, and the 0.55 V forward voltage minimizes power loss during normal conduction - all confirmed in TSC's application notes for automotive power protection.
Does SK33AHR3G have moisture sensitivity level (MSL) certification?
Yes, SK33AHR3G is rated MSL Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH and placed directly into reflow without baking. This eliminates dry-pack handling and simplifies manufacturing for high-volume automotive SMT lines - a key advantage over MSL Level 3+ alternatives.
What is the forward voltage of SK33AHR3G at 3 A and 100°C junction temperature?
The forward voltage of SK33AHR3G remains below 0.62 V at 3 A and 100°C junction temperature, based on TSC's typical VF vs. TJ curve (Fig.4). This increase from 0.55 V at 25°C reflects predictable thermal coefficient behavior and is fully accounted for in automotive thermal design margins.
How does SK33AHR3G differ from SK32AH and SK34AH in the same family?
SK33AHR3G is the 30 V variant in the SK3xAH family; SK32AH is 20 V and SK34AH is 40 V. All share identical package (DO-214AC), current rating (3 A), thermal specs (RθJL = 25°C/W), and AEC-Q101 qualification. The primary difference is VRRM - selecting SK33AHR3G balances margin and efficiency for nominal 12 V systems with moderate transients.
SK33AHR3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 30 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK33AHR3G FAQ
1.How can I place an order for SK33AHR3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK33AHR3G 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 SK33AHR3G reliable?
The price and inventory of SK33AHR3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK33AHR3G is usually 5 days.
3.What payment methods are accepted for SK33AHR3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK33AHR3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK33AHR3G?
SK33AHR3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK33AHR3G 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 SK33AHR3G?
For technical support, including SK33AHR3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK33AHR3G requirements.
6.How does Aetrix verify that SK33AHR3G is sourced from the original manufacturer or authorized distributors?
All SK33AHR3G 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 SK33AHR3G meets industry standards.
7.What is the process for return or replacement of SK33AHR3G?
All SK33AHR3G units undergo pre-shipment inspection (PSI). If there is an issue with SK33AHR3G, 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 SK33AHR3G part is unused and in its original packaging.
Return procedure for SK33AHR3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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