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Diodes Incorporated ZHCS500TC
- Part No.:
- ZHCS500TC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZHCS500TC.pdf
- Description:
- DIODE SCHOTTKY 40V 500MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,667
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Product details
Overview
ZHCS500TC from Diodes Incorporated is a surface-mount Schottky barrier diode rated for 40 V reverse voltage, 500 mA continuous forward current, and 550 mV maximum forward voltage at 500 mA, optimized for high-efficiency DC–DC converters in mobile telecom and PCMCIA applications.
For engineers reviewing the ZHCS500TC datasheet, ZHCS500TC pinout, ZHCS500TC application, or ZHCS500TC equivalent, key selection criteria include its low VF at high IF, AEC-Q101 qualification, SOT23 package thermal performance, and 40 µA max IR at 30 V reverse bias.
Technical Context
This Schottky diode uses a planar epitaxial construction with a low-barrier metal-semiconductor junction to achieve fast switching (tRR ≤ 10 ns) and minimal conduction loss. Its 125 °C maximum junction temperature and 330 mW power dissipation at 25 °C ambient support operation in thermally constrained portable power stages.
The device exhibits graded capacitance (CD = 20 pF at 1 MHz, VR = 25 V) and low reverse recovery charge, enabling high-frequency synchronous rectification. Its 6.75 A non-repetitive surge rating (t ≤ 100 µs) provides robustness against transient overcurrent events in buck converter outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR (Reverse Voltage) | 40 V - Maximum DC blocking capability without breakdown; sets upper limit for input/output voltage rails in step-down converters. |
| IF (Continuous Forward Current) | 500 mA - Sustained output current handling in compact SOT23 footprint; enables high-density power stage layouts. |
| VF @ 500 mA | 550 mV - Low conduction loss directly reduces I²R heating and improves efficiency above 90% in 3.3 V/5 V DC–DC stages. |
| IR @ 30 V | 40 µA - Minimal leakage preserves light-load efficiency and prevents unintended discharge in standby modes. |
| tRR (Reverse Recovery Time) | 10 ns - Enables stable operation up to ~2 MHz switching frequencies without excessive switching loss or ringing. |
| TJ (Max Junction Temperature) | 125 °C - Allows reliable operation in sealed handheld enclosures with limited airflow and ambient temperatures up to 85 °C. |
| PD @ TA=25°C | 330 mW - Thermal limit defines safe operating area when derated per SOT23 thermal resistance (~300 K/W junction-to-ambient). |
Pinout & Package
Package: SOT23 - Surface-mount plastic case, 0.008 g mass, UL 94V-0 rated molding compound, matte tin-plated Alloy 42 leadframe, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward current entry point; connects to switch node in synchronous buck topologies. |
| 2 | No Connect | Internally unconnected terminal; electrically isolated and not bonded to die. |
| 3 | Cathode | Forward current exit and reverse voltage reference; ties to output capacitor ground or common return path. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for industrial and telecom equipment requiring extended lifetime. |
| Lead-free & halogen-free | Meets RoHS 3 (2015/863/EU) and "Green" definition (<900 ppm Br/Cl, <1000 ppm Sb); eliminates hazardous substance compliance risk in global manufacturing. |
| Low VF across operating range | 300 mV @ 100 mA and 550 mV @ 500 mA - maintains high efficiency even under partial-load conditions typical in battery-powered systems. |
| SOT23 thermal performance | 330 mW power dissipation at 25 °C ambient - supports >400 mA continuous current in PCB layouts with minimal copper area. |
| Fast tRR and low CD | 10 ns recovery time + 20 pF capacitance at 25 V - minimizes switching loss and EMI generation in high-frequency DC–DC regulators. |
Applications
| DC–DC Converters | Mobile Telecom Power |
|---|---|
Use Scenario: Secondary-side synchronous rectification in 1–3 MHz buck converters powering baseband processors and RF transceivers. IC Role / Device Role: Low-loss freewheeling diode replacing MOSFET gate drive complexity in cost-sensitive designs. Use Value: 550 mV VF at 500 mA reduces conduction loss by >35% versus standard silicon diodes, extending battery runtime. |
Use Scenario: Input protection and reverse polarity blocking in USB-powered LTE modems and 5G small-cell front-end modules. IC Role / Device Role: Unidirectional current path isolator with minimal voltage drop on 3.3 V supply rails. Use Value: 40 µA IR at 30 V ensures negligible standby current drain during sleep mode, preserving system quiescent current budget. |
| PCMCIA Card Power | Industrial Sensor Node Supply |
Use Scenario: Hot-swap isolation and rail decoupling in legacy PCMCIA Type II cards with dual 3.3 V/5 V supplies. IC Role / Device Role: Reverse-current blocking element preventing backfeed between independent power domains. Use Value: 40 V VR rating accommodates transient overshoots during card insertion while maintaining 125 °C TJ margin. |
Use Scenario: Auxiliary power path management in battery-backed wireless sensor nodes with energy-harvesting inputs. IC Role / Device Role: OR-ing diode selecting between Li-ion battery and harvested solar/motion energy sources. Use Value: 10 ns tRR prevents cross-conduction during source switchover, avoiding momentary short-circuit faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MBR0540T1G (ON Semiconductor) | Same SOT23 package, 40 V VR, but VF = 520 mV @ 500 mA; IR = 50 µA @ 30 V - higher leakage. | Not AEC-Q101 qualified; lacks PPAP capability and automotive traceability. | Acceptable for commercial-grade DC–DC where leakage tolerance >40 µA and qualification not required. |
| SS34 (Vishay) | SMA package (larger), 40 V VR, VF = 500 mV @ 500 mA, IR = 500 µA @ 30 V - 12× higher leakage. | Higher thermal resistance (RθJA ≈ 150 K/W vs. SOT23's ~300 K/W) limits usable current density. | Only suitable where board space permits SMA and leakage is non-critical; not recommended for battery-operated systems. |
Compared with MBR0540T1G and SS34, ZHCS500TC delivers lower IR, AEC-Q101 validation, and tighter VF consistency - making it preferred for thermally constrained, low-quiescent-power, and automotive-adjacent applications.
Availability
ZHCS500TC is available at Aetrix Electronics and suitable for DC–DC converters, mobile telecom power supplies, and PCMCIA card interfaces requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.
Supply support for ZHCS500TC 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, specializing in high-efficiency power management and signal integrity solutions for industrial, computing, and communications markets.
ZHCS500TC belongs to Diodes' high-reliability Schottky diode product line, engineered specifically for low-VF, high-speed rectification in space-constrained, high-frequency power conversion stages.
FAQ
What is the maximum allowable soldering temperature profile for ZHCS500TC?
ZHCS500TC is rated for moisture sensitivity level 1 per J-STD-020, permitting standard reflow profiles with peak temperatures up to 260 °C for ≤ 30 seconds. The matte tin finish ensures compatibility with both leaded and lead-free soldering processes per MIL-STD-202, Method 208.
Does ZHCS500TC support bidirectional current flow?
No. ZHCS500TC is a unidirectional Schottky diode with anode (pin 1) and cathode (pin 3) terminals. Pin 2 is internally unconnected. It conducts only from anode to cathode and blocks reverse current up to 40 V; bidirectional operation would require external circuitry or a different device topology.
How does the 125 °C maximum junction temperature impact PCB layout?
The 125 °C TJ rating requires thermal design that limits junction rise above ambient. With SOT23 RθJA ≈ 300 K/W, maintaining TJ ≤ 125 °C at 500 mA demands ambient ≤ 85 °C and ≥ 25 mm² of 1-oz copper connected to pins 1 and 3 - verified via thermal simulation or IR imaging under worst-case load.
Is ZHCS500TC suitable for use in automotive infotainment systems?
Yes. ZHCS500TC is AEC-Q101 qualified and PPAP capable, meeting stress test requirements for temperature cycling, high-temperature reverse bias, and mechanical shock. Its 40 V VR and 125 °C TJ rating align with 12 V battery-supplied infotainment subsystems, provided layout adheres to automotive thermal and ESD guidelines.
ZHCS500TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 500mA
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 500 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 10 ns
- Current - Reverse Leakage @ Vr:
- 40 µA @ 30 V
- Capacitance @ Vr, F:
- 20pF @ 25V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
- Operating Temperature - Junction:
- 125°C (Max)
ZHCS500TC FAQ
1.How can I place an order for ZHCS500TC through Aetrix?
Please submit a Request for Quotation (RFQ) for ZHCS500TC 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 ZHCS500TC reliable?
The price and inventory of ZHCS500TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZHCS500TC is usually 5 days.
3.What payment methods are accepted for ZHCS500TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZHCS500TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZHCS500TC?
ZHCS500TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZHCS500TC 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 ZHCS500TC?
For technical support, including ZHCS500TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZHCS500TC requirements.
6.How does Aetrix verify that ZHCS500TC is sourced from the original manufacturer or authorized distributors?
All ZHCS500TC 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 ZHCS500TC meets industry standards.
7.What is the process for return or replacement of ZHCS500TC?
All ZHCS500TC units undergo pre-shipment inspection (PSI). If there is an issue with ZHCS500TC, 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 ZHCS500TC part is unused and in its original packaging.
Return procedure for ZHCS500TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZHCS500TC Tags
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