My Inquiry
My Account
Diodes Incorporated SK32-7
- Part No.:
- SK32-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SK32-7.pdf
- Description:
- DIODE SCHOTTKY 20V 3A SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,506
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SK32-7 from Diodes Incorporated is a surface-mount Schottky barrier rectifier rated for 20 V maximum recurrent peak reverse voltage, 3.0 A average forward rectified current, and 0.50 V forward voltage at 3.0 A. It features guard ring construction for transient protection and is used in low-voltage DC/DC converter output stages, USB power delivery circuits, and high-efficiency AC-DC adapter secondary-side rectification.
For engineers reviewing the SK32-7 datasheet, SK32-7 pinout, SK32-7 application, or SK32-7 equivalent, key selection criteria include forward voltage drop at rated current, thermal resistance (10 °C/W junction-to-lead), reverse leakage (0.5 mA at 25 °C), and SMC package compatibility with automated PCB assembly.
Technical Context
This Schottky rectifier employs a planar epitaxial die structure with guard ring passivation to suppress edge breakdown and improve surge robustness. Its low VF and fast switching enable high-efficiency operation in continuous conduction mode (CCM) and discontinuous conduction mode (DCM) topologies.
The device operates across –65 °C to +150 °C junction temperature range and exhibits 300 pF typical junction capacitance at 1 MHz and 4 V reverse bias-critical for minimizing switching losses in high-frequency SMPS designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum reverse blocking capability without avalanche breakdown |
| I(AV) | 3.0 A - Continuous DC output current capability with 8.0 mm² copper pad |
| VF @ 3.0A | 0.50 V - Low conduction loss enabling >92% efficiency in 5 V output converters |
| IR @ 25°C | 0.5 mA - Minimal reverse leakage preserving standby power budget |
| RθJL | 10 °C/W - Junction-to-lead thermal resistance enabling direct thermal path to PCB copper |
| CT @ 1MHz | 300 pF - Low junction capacitance reducing turn-off switching loss |
| TJ Range | –65 to +150 °C - Validated operation in automotive under-hood and industrial control environments |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin lead finish; polarity indicated by cathode band; approximate weight 0.21 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction | Connected to transformer secondary or switch node; handles full load current with minimal IR drop |
| Cathode | Output terminal for forward conduction | Connected to output capacitor and load; marked by molded band; carries return current path |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring construction | Suppresses edge leakage and improves transient voltage immunity per MIL-STD-19500 |
| Low VF (0.50 V @ 3.0 A) | Reduces conduction loss by ≥35% vs. comparable PN-junction rectifiers at same current |
| 100 A IFSM rating | Withstands 8.3 ms half-sine surge without degradation-supports inrush-limited hot-swap designs |
| UL 94V-0 flammability | Meets safety requirements for enclosed power supplies and Class II equipment |
| Moisture sensitivity Level 1 | Enables standard SMT reflow without baking preconditioning |
Applications
| USB-C Power Delivery Adapter | Industrial PLC I/O Module |
|---|---|
Use Scenario: Secondary-side synchronous rectification in 20 V / 3 A USB PD 3.0 adapter. IC Role / Device Role / Timing Role: Uncontrolled Schottky rectifier replacing MOSFET gate drive complexity in cost-sensitive designs. Use Value: 0.50 V VF enables <1.5 W conduction loss at full load, meeting CoC Tier 2 efficiency targets without active control. | Use Scenario: Reverse-polarity protection and input rectification in 24 V DC-powered digital I/O channel. IC Role / Device Role / Timing Role: Polarity guard and EMI-suppressed DC feed diode in isolated field-side interface. Use Value: Guard ring design withstands 1 kV EFT bursts per IEC 61000-4-4, eliminating need for external TVS. |
| Automotive Body Control Unit | LED Driver Power Stage |
Use Scenario: Battery backup path management in 12 V BCM sub-module with dual-supply redundancy. IC Role / Device Role / Timing Role: OR-ing diode enabling seamless switchover between main battery and auxiliary supply. Use Value: 10 °C/W RθJL allows direct mounting to chassis ground plane, maintaining <110 °C junction temp at 2.5 A continuous. | Use Scenario: Output rectification in constant-current LED driver for streetlight applications. IC Role / Device Role / Timing Role: High-reliability DC feed diode in thermally constrained aluminum-core PCB layout. Use Value: 300 pF CT minimizes high-frequency ringing during PWM dimming transitions, reducing conducted EMI by 8 dBµV. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| B320B-13-F | 20 V VRRM, 2.0 A I(AV), 0.5 V VF - lower current rating, same VF | Not suitable for 3 A sustained loads; limited to ≤1.8 A derated operation | Select only when board space or thermal mass restricts SMC footprint use |
| SS32H | 20 V VRRM, 3.0 A I(AV), 0.52 V VF - identical rating, higher RθJA (60 °C/W) | Requires larger copper area or forced air cooling above 1.5 A | Prefer for legacy designs using SMA package; avoid in thermally dense layouts |
Compared with SK32-7, B320B-13-F trades current capacity for smaller SMA package, while SS32H matches electrical specs but imposes stricter PCB thermal design due to 6× higher junction-to-ambient resistance.
Availability
SK32-7 is available at Aetrix Electronics and suitable for USB-C power adapters, industrial PLC I/O modules, and automotive body control units requiring stable component supply and long-term manufacturability.
Supply support for SK32-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the US.
The SKxx series belongs to Diodes' high-reliability Schottky rectifier product line, engineered for high-efficiency, low-noise power conversion in consumer, industrial, and automotive applications where low VF and robust surge handling are critical.
FAQ
Is SK32-7 RoHS compliant and halogen-free?
Yes. SK32-7 uses matte tin lead finish and meets RoHS Directive 2011/65/EU and JEDEC JS709C halogen-free requirements. The SMC package material is UL 94V-0 rated, and moisture sensitivity is Level 1 per J-STD-020A-no bake required before reflow.
What is the maximum allowable PCB land pad size for optimal thermal performance?
Optimal thermal performance requires an 8.0 mm² copper pad (e.g., 2.0 mm × 4.0 mm) per the datasheet's Fig. 1 derating curve. Using smaller pads reduces I(AV) to ≤2.2 A at 70 °C ambient; larger pads yield diminishing returns beyond 12 mm² due to SMC package thermal interface limits.
Can SK32-7 replace SK33-7 in a 30 V design?
No. SK32-7 has 20 V VRRM and is not rated for 30 V reverse stress. Substituting it in a 30 V design risks catastrophic failure during line transients or no-load conditions. Use SK33-7 (30 V VRRM) or SK34-7 (40 V VRRM) instead-both share identical package and thermal characteristics.
Does SK32-7 support automatic optical inspection (AOI) after reflow?
Yes. The SMC package's defined cathode band, consistent solderable terminations, and 0.21 g mass enable reliable AOI detection. Diodes Incorporated specifies solderability per MIL-STD-202, Method 208, and the matte tin plating provides uniform reflectivity for camera-based post-reflow verification.
SK32-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- 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:
- 300pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
- Operating Temperature - Junction:
- -65°C ~ 150°C
SK32-7 FAQ
1.How can I place an order for SK32-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SK32-7 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 SK32-7 reliable?
The price and inventory of SK32-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK32-7 is usually 5 days.
3.What payment methods are accepted for SK32-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK32-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK32-7?
SK32-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK32-7 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 SK32-7?
For technical support, including SK32-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK32-7 requirements.
6.How does Aetrix verify that SK32-7 is sourced from the original manufacturer or authorized distributors?
All SK32-7 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 SK32-7 meets industry standards.
7.What is the process for return or replacement of SK32-7?
All SK32-7 units undergo pre-shipment inspection (PSI). If there is an issue with SK32-7, 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 SK32-7 part is unused and in its original packaging.
Return procedure for SK32-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SK32-7 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
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
