My Inquiry
My Account
Diodes Incorporated ZHCS400QTA
- Part No.:
- ZHCS400QTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
ZHCS400QTA.pdf
- Description:
- DIODE SCHOTTKY 40V 1A SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,596
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ZHCS400QTA from Diodes Incorporated is a 40 V, 400 mA surface-mount Schottky barrier diode in SOD323 package, featuring 300 mV forward voltage at 100 mA, 40 µA reverse leakage at 30 V, and AEC-Q101 qualification for automotive use in DC-DC converters and reverse polarity protection circuits.
For engineers reviewing the ZHCS400QTA datasheet, ZHCS400QTA pinout, ZHCS400QTA application, or ZHCS400QTA equivalent, this part supports high-efficiency operation above +85°C, offers low thermal resistance (500 °C/W), and delivers fast switching (12 ns trr) with robust ESD protection (4 kV HBM).
Technical Context
This Schottky diode employs a planar epitaxial construction optimized for low VF and minimal IR across temperature. Its junction-to-ambient thermal resistance of 500 °C/W reflects the SOD323 package's limited heat-spreading capability, requiring careful PCB copper area design for sustained 400 mA operation.
The device achieves 12 ns reverse recovery time due to majority-carrier conduction and absence of minority-carrier storage, enabling efficient high-frequency rectification in compact DC-DC topologies where low-loss, fast-switching behavior is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum continuous reverse blocking voltage before breakdown |
| IO | 400 mA - Average rectified current rating at +25°C ambient |
| VF @ 100 mA | 300 mV - Forward drop determining conduction loss in low-voltage power paths |
| IR @ 30 V | 40 µA - Reverse leakage defining off-state power loss and thermal stability |
| tRR | 12 ns - Reverse recovery time enabling >10 MHz switching in buck/boost stages |
| RθJA | 500 °C/W - Thermal resistance limiting power dissipation to 250 mW at +25°C |
| ESD HBM | 4000 V - Human-body-model ESD robustness supporting automotive assembly environments |
Pinout & Package
Package: SOD323 - ultra-compact 2-pin surface-mount plastic package (1.30 mm × 1.70 mm × 0.90 mm), cathode marked by band, matte tin–annealed terminals on Alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side in rectifier or freewheeling path |
| Cathode | Forward current exit / reverse-blocking terminal | Marked with band; ties to higher-potential node or output rail |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTOL, and ESD per JESD47 |
| Low VF at high IF | 425–500 mV at 400 mA enables <170 mW conduction loss in 5 V input rails |
| SOD323 footprint | 0.004 g mass and 1.3 mm × 1.7 mm area support ultra-dense portable PCB layouts |
| Halogen & antimony free | Meets "Green" definition: Br+Cl <1500 ppm, Sb <1000 ppm - compliant with automotive ELV directives |
Applications
| DC-DC Converters | Mobile Telecom Power |
|---|---|
Use Scenario: Synchronous rectification in 3.3 V/5 V buck converters for baseband processors. IC Role / Device Role / Timing Role: Freewheeling diode replacing MOSFET body diode to reduce conduction loss. Use Value: 300 mV VF at 100 mA cuts diode loss by ~40% vs. standard silicon diodes, improving efficiency at light load. | Use Scenario: Input reverse polarity protection in USB-powered LTE modules. IC Role / Device Role / Timing Role: Series blocking diode preventing damage during incorrect battery insertion. Use Value: 40 µA IR at 30 V ensures <1.2 µW standby leakage, preserving battery life over multi-year deployments. |
| Automotive Body Control | Industrial Sensor Nodes |
Use Scenario: Clamping and flyback suppression in 12 V LIN bus transceiver I/O lines. IC Role / Device Role / Timing Role: Transient voltage suppressor and inductive kickback absorber. Use Value: 4 kV HBM ESD rating meets ISO 10605 requirements without external TVS, reducing BOM count. | Use Scenario: Output isolation in 24 V industrial IO-Link sensor power supplies. IC Role / Device Role / Timing Role: Reverse current blocker between redundant power domains. Use Value: AEC-Q101 qualification ensures stable performance under 105°C ambient and vibration stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MBR0540T1G | Higher VF (450 mV @ 400 mA), TO-236AB (SOT-23) package, 1 A IO rating | Larger footprint; better suited for higher-current, non-automotive industrial use | Select when >400 mA average current or legacy SOT-23 layout compatibility is required |
| SS14 | Lower IR (10 µA @ 40 V), SMA package, 1 A IO, but not AEC-Q101 qualified | Not automotive-qualified; lacks PPAP documentation and IATF 16949 manufacturing traceability | Choose only for cost-sensitive consumer applications where automotive compliance is unnecessary |
Compared with MBR0540T1G and SS14, ZHCS400QTA uniquely balances ultra-compact SOD323 size, AEC-Q101 qualification, and sub-350 mV VF at 100 mA-making it optimal for space-constrained automotive power nodes requiring validated reliability.
Availability
ZHCS400QTA is available at Aetrix Electronics and suitable for DC-DC converters, automotive body electronics, and industrial sensor nodes requiring stable component supply with full automotive qualification traceability.
Supply support for ZHCS400QTA 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, manufacturing, and distribution operations across Asia, Europe, and North America.
ZHCS400QTA belongs to Diodes' ZHCS Schottky diode product line, engineered specifically for high-efficiency, high-temperature operation in automotive and portable power applications where low VF and low IR are critical.
FAQ
What is the maximum junction temperature for continuous operation?
The ZHCS400QTA has a rated maximum junction temperature of +125°C. At ambient temperatures up to +85°C, derating must be applied based on its 500 °C/W thermal resistance and 250 mW power dissipation limit. Full 400 mA current is sustainable only with adequate PCB copper thermal relief or forced airflow.
Is ZHCS400QTA compatible with lead-free reflow soldering profiles?
Yes. ZHCS400QTA is fully RoHS 3 compliant and qualified for lead-free reflow soldering per JEDEC J-STD-020, with Moisture Sensitivity Level 1. Its matte tin–annealed terminals meet MIL-STD-202 Method 208 solderability requirements and withstand peak reflow temperatures up to 260°C.
Does the SOD323 package support automated optical inspection (AOI)?
Yes. The SOD323 package features a visible cathode band and consistent terminal geometry, enabling reliable AOI detection of placement orientation and solder joint integrity. Its 0.30 mm lead width and 1.70 mm body width fall within standard AOI camera resolution thresholds for 10 µm pixel pitch systems.
How does ZHCS400QTA perform at elevated ambient temperatures?
At +100°C ambient, ZHCS400QTA maintains VF ≈ 440 mV at 500 mA and IR remains ≤15 µA at 30 V. Its operational efficiency chart confirms stable performance up to +125°C junction temperature, making it suitable for under-hood automotive modules and thermally dense portable designs.
ZHCS400QTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 780 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 40 µA @ 30 V
- Capacitance @ Vr, F:
- 20pF @ 25V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
- Operating Temperature - Junction:
- -55°C ~ 150°C
ZHCS400QTA FAQ
1.How can I place an order for ZHCS400QTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZHCS400QTA 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 ZHCS400QTA reliable?
The price and inventory of ZHCS400QTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZHCS400QTA is usually 5 days.
3.What payment methods are accepted for ZHCS400QTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZHCS400QTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZHCS400QTA?
ZHCS400QTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZHCS400QTA 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 ZHCS400QTA?
For technical support, including ZHCS400QTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZHCS400QTA requirements.
6.How does Aetrix verify that ZHCS400QTA is sourced from the original manufacturer or authorized distributors?
All ZHCS400QTA 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 ZHCS400QTA meets industry standards.
7.What is the process for return or replacement of ZHCS400QTA?
All ZHCS400QTA units undergo pre-shipment inspection (PSI). If there is an issue with ZHCS400QTA, 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 ZHCS400QTA part is unused and in its original packaging.
Return procedure for ZHCS400QTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZHCS400QTA 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…
