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Diodes Incorporated ZHCS350TA
- Part No.:
- ZHCS350TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
ZHCS350TA.pdf
- Description:
- DIODE SCHOTTKY 40V 350MA SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:85,005
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Product details
Overview
ZHCS350TA from Diodes Incorporated is a 40V, 350mA surface-mount Schottky barrier diode in the SOD523 package, featuring 405mV typical forward voltage at 100mA, 7μA typical reverse leakage at 30V, and 1.6ns reverse recovery time-optimized for high-frequency DC–DC converters and mobile charger circuits.
For engineers reviewing the ZHCS350TA datasheet, ZHCS350TA pinout, ZHCS350TA application, or ZHCS350TA equivalent, key selection criteria include low-profile height (0.9mm), thermal resistance (300°C/W on 1-inch² copper pad), RoHS-compliant matte tin plating, and automotive-grade variant availability (ZHCS350Q).
Technical Context
This Schottky diode uses a planar epitaxial construction to achieve low forward voltage and fast switching with minimal stored charge. Its 1.6ns reverse recovery time and 3.3–6pF junction capacitance at 1MHz/25V support operation in MHz-range buck and boost topologies.
The device operates within –55°C to +150°C storage range and 125°C maximum junction temperature. Thermal performance is specified for two PCB mounting conditions: 470°C/W on standard FR-4 and 300°C/W on enhanced 1-inch² copper pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR | 40V reverse blocking capability-supports input rails up to 36V in industrial DC–DC designs |
| IF(AV) | 510mA average rectified current-enables continuous conduction mode in low-power SMPS |
| VF @ 100mA | 405mV typical-reduces conduction loss by ~30% vs. comparable 1N5819-class diodes |
| IR @ 30V | 7μA typical-minimizes standby power loss in battery-powered LED drivers |
| tRR | 1.6ns-enables clean switching in >5MHz synchronous rectifier applications |
| CD @ 1MHz | 3.3–6pF-limits capacitive feedthrough in high-side gate-drive bootstrap paths |
| RθJA (copper pad) | 300°C/W-allows 330mW power dissipation at +85°C ambient with proper layout |
Pinout & Package
Package: SOD523 - ultra-low-profile plastic package (0.9mm height), cathode-banded polarity, 0.004g weight, UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to switch node or inductor output in buck topology; requires low-inductance trace routing |
| Cathode | Forward current exit / reverse voltage reference | Connected to ground or output rail; cathode band identifies terminal on top view per JEDEC MO-203AA |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOD523 package | 0.9mm max height enables use in space-constrained mobile PCBs and thin LED modules |
| 100% matte tin-plated leads | Ensures reliable solderability per MIL-STD-202 Method 208 and eliminates lead-free reflow voiding risks |
| Halogen- and antimony-free "Green" construction | Meets IEC 61249-2-21: <900ppm Br, <900ppm Cl, <1000ppm Sb-compliant for automotive interior electronics |
| Moisture sensitivity Level 1 | No bake requirement before SMT assembly-reduces manufacturing overhead and floor-life management cost |
Applications
| DC–DC Converters | Mobile Charger Circuits |
|---|---|
Use Scenario: Synchronous rectification in 3.3V/5V buck converters powering PMICs and SoCs. IC Role / Device Role: Low-VF freewheeling diode replacing MOSFET body diode to reduce conduction loss. Use Value: 405mV VF at 100mA cuts diode power loss by 45% versus 750mV alternatives, improving efficiency by 1.2% at 500mA load. | Use Scenario: Output rectification in USB-C PD 5V/3A wall adapters with tight thermal constraints. IC Role / Device Role: Secondary-side Schottky clamp limiting voltage overshoot during transient load steps. Use Value: 1.6ns tRR prevents shoot-through in multi-phase designs; 0.9mm profile allows placement under connector shields. |
| LED Driver Circuits | MOSFET Voltage Protection |
Use Scenario: Reverse-polarity protection and flyback suppression in constant-current LED strings. IC Role / Device Role: Low-leakage series blocking diode preventing battery drain when system is off. Use Value: 7μA IR at 30V limits dark-current loss to <0.2μW per string-critical for multi-week shelf life in IoT lighting nodes. | Use Scenario: Clamp diode across high-side N-channel MOSFET gate-source in half-bridge motor drivers. IC Role / Device Role: Fast turn-on clamping of VGS spikes during dV/dt transients. Use Value: 3.3pF CD minimizes capacitive coupling into gate drive path; 40V VR withstands 36V bus overvoltage events. |
Availability
ZHCS350TA is available at Aetrix Electronics and suitable for DC–DC converters, mobile charger circuits, and LED driver circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for ZHCS350TA 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, serving industrial, computing, consumer, and communications markets since 1964.
The Zetex Schottky diode product line-including ZHCS350TA-is engineered for high-efficiency, high-frequency power conversion in portable and space-constrained applications where low VF, fast tRR, and minimal package height are critical.
FAQ
What is the maximum continuous forward current rating for ZHCS350TA?
The ZHCS350TA has a 350mA continuous forward current (IF) rating at +25°C ambient. Its 510mA average peak forward current (IFAV) applies under 50% duty cycle conditions. Derating is required above +25°C per the RθJA = 300°C/W spec on copper pad layouts.
Is ZHCS350TA suitable for automotive applications?
The ZHCS350TA is not AEC-Q200 qualified. However, an automotive-compliant variant-ZHCS350Q-is available under a separate datasheet (DS33214-Q) and meets AEC-Q200 Grade 2 (–40°C to +105°C operating range) with extended reliability testing.
How does the SOD523 package affect thermal performance?
The SOD523's small footprint limits heat spreading, resulting in higher thermal resistance: 470°C/W on standard FR-4 and 300°C/W on 1-inch² copper pad. Layout must use thermal vias and copper pour to sustain 330mW dissipation at +85°C ambient.
What is the reverse breakdown voltage specification?
ZHCS350TA has a minimum reverse breakdown voltage (V(BR)R) of 40V at IR = 100μA, with typical values reaching 60V. This provides margin against 36V nominal input surges in industrial 24V systems without requiring derating.
ZHCS350TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 350mA
- Voltage - Forward (Vf) (Max) @ If:
- 810 mV @ 350 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 1.6 ns
- Current - Reverse Leakage @ Vr:
- 12 µA @ 30 V
- Capacitance @ Vr, F:
- 6pF @ 25V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
- Operating Temperature - Junction:
- 125°C (Max)
ZHCS350TA FAQ
1.How can I place an order for ZHCS350TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZHCS350TA 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 ZHCS350TA reliable?
The price and inventory of ZHCS350TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZHCS350TA is usually 5 days.
3.What payment methods are accepted for ZHCS350TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZHCS350TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZHCS350TA?
ZHCS350TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZHCS350TA 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 ZHCS350TA?
For technical support, including ZHCS350TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZHCS350TA requirements.
6.How does Aetrix verify that ZHCS350TA is sourced from the original manufacturer or authorized distributors?
All ZHCS350TA 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 ZHCS350TA meets industry standards.
7.What is the process for return or replacement of ZHCS350TA?
All ZHCS350TA units undergo pre-shipment inspection (PSI). If there is an issue with ZHCS350TA, 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 ZHCS350TA part is unused and in its original packaging.
Return procedure for ZHCS350TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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