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Diodes Incorporated ZHCS1000QTA
- Part No.:
- ZHCS1000QTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZHCS1000QTA.pdf
- Description:
- DIODE SCHOTTKY 40V 1A SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,904
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Product details
Overview
ZHCS1000QTA from Diodes Incorporated is a surface-mount Schottky barrier diode rated for 40 V reverse voltage, 1 A average rectified current, and 425 mV typical forward voltage at 1 A, designed for high-efficiency DC-DC converters and reverse polarity protection in automotive-grade power rails.
For engineers reviewing the ZHCS1000QTA datasheet, ZHCS1000QTA pinout, ZHCS1000QTA application, or ZHCS1000QTA equivalent, key selection criteria include its AEC-Q101 qualification, low 425 mV VF at 1 A, 50 µA IR at 30 V, SOT23 package compatibility, and thermal performance up to +125°C junction temperature.
Technical Context
This Schottky diode uses a planar epitaxial construction with a low-barrier metal-semiconductor junction to minimize forward conduction loss and enable fast recovery (tRR ≤ 12 ns). Its 25 pF capacitance at 1 MHz and 30 V bias supports high-frequency switching in synchronous rectifier and flyback topologies.
The device operates within a -55°C to +150°C storage range and sustains 5.2 A non-repetitive surge current for 10 ms, making it suitable for transient-heavy automotive power supply inputs where reliability under load dump conditions is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum continuous reverse blocking voltage before breakdown; sets upper limit for input rail protection in 24 V automotive systems. |
| IO | 1 A - Average rectified output current; defines steady-state power delivery capability in buck converter outputs. |
| VF (Typ @ 1 A) | 425 mV - Low forward drop reduces conduction loss by ~40% vs. standard silicon diodes, improving efficiency in 5–12 V DC-DC stages. |
| IR (Typ @ 30 V) | 50 µA - Low leakage preserves battery standby time in always-on telecom modules and infotainment power domains. |
| tRR | 12 ns - Ultra-fast recovery minimizes switching loss and EMI in >500 kHz SMPS designs without requiring snubbers. |
| TJ Max | +125 °C - Junction temperature rating enables operation in engine bay proximity without derating in AEC-Q101-compliant modules. |
| CT | 25 pF @ 1 MHz, 30 V - Low junction capacitance maintains high-frequency response in RF decoupling and signal clamping roles. |
Pinout & Package
Package: SOT23 - 3-terminal surface-mount plastic package with matte tin-plated alloy 42 leadframe, UL 94V-0 rated molding compound, and moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to higher-potential node (e.g., switch node in buck converter); must handle 1.5 A peak surges per datasheet. |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Connected to output rail or ground return; provides 40 V reverse isolation and low-impedance path during conduction. |
| NC / Heat Sink Pad (Pin 3) | No internal connection | Unused terminal; electrically isolated but thermally coupled to die via leadframe; may be grounded for EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power supplies with zero early-life failure under stress testing. |
| Lead-free & Halogen-free | Meets RoHS 2 (2011/65/EU) and JEDEC JS709C green standards (<900 ppm Br/Cl, <1000 ppm Sb), enabling compliance in EU and China auto markets. |
| Low thermal resistance | θJA = 250°C/W on 15 mm × 15 mm ceramic substrate - enables 1 A operation without heatsink in compact PCB layouts. |
| PPAP capable | Full production part approval process documentation available, supporting Tier-1 supplier requirements for serial automotive builds. |
Applications
| DC-DC Converters | Reverse Polarity Protection |
|---|---|
Use Scenario: Secondary-side synchronous rectification in 5 V/3 A buck converter for infotainment head units. IC Role / Device Role: Low-loss freewheeling diode replacing MOSFET gate drive complexity in cost-sensitive designs. Use Value: 425 mV VF cuts conduction loss by 0.425 W vs. 1 V Si diode, reducing thermal load on 4-layer PCBs. | Use Scenario: Input protection for 12 V telematics module powered from vehicle battery with accidental reverse connection risk. IC Role / Device Role: Series-blocking element placed between connector and LDO input. Use Value: 40 V VRRM withstands load dump transients; 50 µA IR prevents battery drain during 10-year vehicle service life. |
| Mobile Telecomms | Blocking Diodes |
Use Scenario: Power OR-ing in dual-input portable base station radio with USB-C and PoE inputs. IC Role / Device Role: Isolation diode preventing backfeed between independent 5 V supplies. Use Value: 12 ns tRR eliminates cross-conduction during supply switchover; SOT23 footprint saves board space vs. SO-8 alternatives. | Use Scenario: Solar charge controller output stage isolating battery from panel during night-time reverse current flow. IC Role / Device Role: Unidirectional current gate in photovoltaic energy harvesting path. Use Value: 1 A IO rating supports 10 W panel output; 25 pF CT avoids signal distortion in MPPT feedback sensing lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB140-E3/54 | Higher VF (500 mV @ 1 A), larger DO-41 package, no AEC-Q101 qualification | Not suitable for automotive PPAP; limited to industrial or consumer power supplies | Select when cost is primary constraint and AEC-Q101 compliance is unnecessary. |
| RB050M-30 | Lower IO (500 mA), same SOT23-3 package, VF = 450 mV @ 500 mA | Insufficient current rating for 1 A DC-DC outputs; acceptable only in 3.3 V/500 mA auxiliary rails | Choose only for sub-500 mA loads where footprint compatibility is mandatory. |
Compared with SB140-E3/54 and RB050M-30, ZHCS1000QTA uniquely delivers automotive-grade reliability, 1 A current handling, and lowest VF in SOT23 - making it the sole option for AEC-Q101-compliant 1 A DC-DC rectification where thermal and space constraints are tight.
Availability
ZHCS1000QTA is available at Aetrix Electronics and suitable for automotive power management, telecom DC-DC conversion, and reverse polarity protection requiring stable component supply across multi-year production cycles.
Supply support for ZHCS1000QTA 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 centers across Asia and manufacturing in Taiwan and China.
The ZHCS1000QTA belongs to Diodes' AEC-Q101-qualified Schottky diode product line, engineered specifically for high-reliability automotive power conversion and protection where low VF, fast recovery, and long-term parametric stability are mandatory.
FAQ
What is the maximum junction temperature for continuous operation?
The ZHCS1000QTA has a maximum junction temperature of +125°C under continuous operation, verified per AEC-Q101 thermal cycling and high-temperature operating life tests. Derating is required above +100°C ambient when operating at full 1 A load due to thermal resistance limitations of the SOT23 package.
Is ZHCS1000QTA suitable for synchronous rectifier replacement?
Yes - its 425 mV VF at 1 A and 12 ns tRR make it viable for asynchronous rectification in medium-frequency (100–500 kHz) flyback and buck converters. However, it cannot replace MOSFET-based synchronous rectifiers in high-efficiency (>95%) designs due to inherent conduction loss limitations.
Does this diode require a heatsink in 1 A applications?
No external heatsink is required for 1 A DC operation on standard FR-4 PCBs with 1 oz copper and minimal copper area. Thermal simulation shows junction temperature remains below +125°C with ≥ 100 mm² of 1 oz copper connected to cathode pad, per Diodes' AP02002 layout guidelines.
What is the meaning of "PPAP Capable" for ZHCS1000QTA?
"PPAP Capable" means Diodes Incorporated maintains full Production Part Approval Process documentation - including design FMEAs, process flow diagrams, control plans, and initial process studies - enabling Tier-1 automotive suppliers to submit compliant PPAP packages for ZHCS1000QTA in production releases.
ZHCS1000QTA 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:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 425 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 12 ns
- Current - Reverse Leakage @ Vr:
- 100 µA @ 30 V
- Capacitance @ Vr, F:
- 25pF @ 30V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
- Operating Temperature - Junction:
- -55°C ~ 150°C
ZHCS1000QTA FAQ
1.How can I place an order for ZHCS1000QTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZHCS1000QTA 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 ZHCS1000QTA reliable?
The price and inventory of ZHCS1000QTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZHCS1000QTA is usually 5 days.
3.What payment methods are accepted for ZHCS1000QTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZHCS1000QTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZHCS1000QTA?
ZHCS1000QTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZHCS1000QTA 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 ZHCS1000QTA?
For technical support, including ZHCS1000QTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZHCS1000QTA requirements.
6.How does Aetrix verify that ZHCS1000QTA is sourced from the original manufacturer or authorized distributors?
All ZHCS1000QTA 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 ZHCS1000QTA meets industry standards.
7.What is the process for return or replacement of ZHCS1000QTA?
All ZHCS1000QTA units undergo pre-shipment inspection (PSI). If there is an issue with ZHCS1000QTA, 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 ZHCS1000QTA part is unused and in its original packaging.
Return procedure for ZHCS1000QTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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