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Diodes Incorporated BAS40-04T-7
- Part No.:
- BAS40-04T-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- SOT-523
- Datasheet:
-
BAS40-04T-7.pdf
- Description:
- DIODE ARR SCHOT 40V 200MA SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:8,736
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Product details
Overview
BAS40-04T-7 from Diodes Incorporated is a surface-mount Schottky barrier diode in SOT523 package, rated for 40 V peak repetitive reverse voltage, 200 mA forward current, and 5.0 ns reverse recovery time. It delivers low forward voltage drop (380 mV at 1.0 mA), fast switching, and PN junction guard ring protection for ESD and transients - used in DC-DC converter output rectification and high-frequency signal clamping.
For engineers reviewing the BAS40-04T-7 datasheet, BAS40-04T-7 pinout, BAS40-04T-7 application, or BAS40-04T-7 equivalent, key selection criteria include reverse voltage rating, forward voltage at low bias, reverse recovery speed, junction-to-ambient thermal resistance, and SOT523 package compatibility with high-density PCB layouts.
Technical Context
This Schottky diode uses a platinum-silicide (PtSi) or similar low-barrier metal-semiconductor junction to achieve low VF and fast trr. Its guard ring structure suppresses edge breakdown and improves transient robustness without increasing capacitance.
Designed for operation from –55 °C to +125 °C, it maintains stable leakage (<200 nA at 30 V) and capacitance (5.0 pF at 0 V, 1 MHz) across temperature, supporting reliable performance in portable power management and RF detector circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum blocking voltage before avalanche; sets upper limit for input/output rail separation in buck converters. |
| IF | 200 mA continuous - Sustained forward current capability under FR-4 board conditions; defines usable load range in low-power rectifiers. |
| VF | 380 mV @ 1 mA - Low conduction loss at light loads; critical for battery-powered signal-level clamping and biasing. |
| trr | 5.0 ns - Fast minority-carrier-free recovery; enables >100 MHz switching in RF envelope detectors and snubbers. |
| CT | 5.0 pF @ 0 V, 1 MHz - Minimal junction capacitance; preserves signal integrity in high-frequency sampling and mixer applications. |
| RθJA | 833 °C/W - Thermal resistance on standard FR-4; limits power dissipation to 150 mW at 25 °C ambient. |
Pinout & Package
Package: SOT523 - ultra-small plastic surface-mount package (1.60 × 1.60 × 0.75 mm), moisture sensitivity level 1, matte tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to higher-potential node in rectifier/clamp; polarity marked by device top-side notch or dot. |
| Cathode (Pin 2) | Forward current exit / reverse voltage reference | Typically tied to ground or lower-potential rail; serves as return path and voltage reference for clamping threshold. |
| Case / Exposed Pad (Pin 3) | Non-electrical mechanical termination | No internal connection; provides mechanical anchoring and limited thermal relief; not to be used as thermal pad or ground node. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | 380 mV at 1 mA - reduces conduction loss in low-current bias networks and extends battery life in wearables. |
| Fast switching speed | 5.0 ns reverse recovery - supports clean waveform fidelity in 100+ MHz RF detector and sampling circuits. |
| PN junction guard ring | Integrated edge termination - prevents premature breakdown under ESD stress (IEC 61000-4-2 Level 4) and voltage transients. |
| Ultra-small SOT523 footprint | 1.60 × 1.60 mm outline - enables placement in space-constrained modules such as Bluetooth LE transceivers and smart sensor nodes. |
Applications
| DC-DC Converter Output Rectification | RF Signal Envelope Detection |
|---|---|
Use Scenario: Synchronous or asynchronous rectification in 3.3 V/5 V buck converters for IoT edge nodes. IC Role / Device Role: Low-loss freewheeling diode replacing MOSFET body diode where gate drive complexity must be minimized. Use Value: 380 mV VF at light load cuts standby power loss by >40% vs. standard silicon diodes, extending battery runtime. | Use Scenario: AM demodulation in 2.4 GHz ISM-band receiver front-ends. IC Role / Device Role: Passive envelope detector converting RF carrier amplitude to baseband voltage. Use Value: 5.0 ns trr and 5.0 pF CT preserve modulation bandwidth up to 10 MHz, enabling accurate pulse-width decoding. |
| High-Speed Logic-Level Clamping | ESD-Protected I/O Interface Protection |
Use Scenario: Input voltage limiting on 3.3 V microcontroller GPIO pins interfacing with external sensors. IC Role / Device Role: Bidirectional clamp between VCC and GND using dual-diode configuration. Use Value: Guard ring structure ensures clamping remains stable after repeated ±8 kV contact ESD events per IEC 61000-4-2. | Use Scenario: Transient suppression on USB 2.0 D+/D− lines in portable medical monitors. IC Role / Device Role: Low-capacitance steering diode shunting ESD current to rails while preserving signal integrity. Use Value: 5.0 pF capacitance avoids signal rise-time degradation beyond USB 2.0 specification (≤1.5 ns). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSR0230HT1G | 30 V VRRM, 200 mA IF, 0.45 V VF @ 10 mA, SOD-523 package | Lower reverse voltage rating; unsuitable for 40 V bus applications | Select when system max reverse voltage ≤30 V and lowest possible VF at moderate current is prioritized. |
| RB520S-40T1G | 40 V VRRM, 200 mA IF, 0.37 V VF @ 100 mA, SOD-523 package | Higher VF at low current (450 mV @ 1 mA); identical trr and CT | Prefer for high-current rectification (>50 mA), but avoid where sub-400 mV VF at µA–mA bias is required. |
Compared with NSR0230HT1G and RB520S-40T1G, BAS40-04T-7 uniquely balances 40 V rating, sub-400 mV VF at 1 mA, and 5 ns trr in SOT523 - making it optimal for low-bias, high-speed clamping where voltage margin and nanosecond timing coexist.
Availability
BAS40-04T-7 is available at Aetrix Electronics and suitable for DC-DC converter output rectification, RF envelope detection, high-speed logic-level clamping, and ESD-protected I/O interface protection requiring stable component supply and consistent SOT523 packaging.
Supply support for BAS40-04T-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, manufacturing, and sales operations across Asia, Europe, and North America.
The BAS40 series belongs to Diodes' high-speed Schottky diode product line, engineered specifically for low-voltage, high-frequency applications including portable power management, RF signal conditioning, and ESD-hardened digital interfaces.
FAQ
What is the maximum junction temperature for BAS40-04T-7?
The absolute maximum junction temperature is +125 °C, with continuous operation supported from –55 °C to +125 °C. Derating begins above 25 °C ambient at 150 mW / 833 °C/W, reaching zero power dissipation at 125 °C ambient per the published derating curve.
Is BAS40-04T-7 qualified for automotive use?
No - BAS40-04T-7 is not AEC-Q101 qualified. Diodes offers automotive-grade variants (e.g., BAS40-04TW) with PPAP documentation, IATF 16949 manufacturing, and extended temperature screening; this part is intended for commercial and industrial applications only.
How does the guard ring improve reliability?
The integrated PN junction guard ring distributes electric field stress away from the active Schottky junction periphery, suppressing edge-initiated avalanche and improving immunity to ESD (≥8 kV contact per IEC 61000-4-2) and repetitive voltage transients without increasing leakage or capacitance.
Can BAS40-04T-7 replace BAS40T in existing designs?
Yes - BAS40-04T-7 shares identical electrical specifications, SOT523 package, and pinout with BAS40T. The "-04" suffix denotes a specific process and marking variant; both meet DS30265 Rev. 14 specifications and are functionally interchangeable in all documented applications.
BAS40-04T-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Diode Configuration:
- 1 Pair Series Connection
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io) (per Diode):
- 200mA (DC)
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 40 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 200 nA @ 30 V
- Operating Temperature - Junction:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-523
BAS40-04T-7 FAQ
1.How can I place an order for BAS40-04T-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS40-04T-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 BAS40-04T-7 reliable?
The price and inventory of BAS40-04T-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS40-04T-7 is usually 5 days.
3.What payment methods are accepted for BAS40-04T-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS40-04T-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS40-04T-7?
BAS40-04T-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS40-04T-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 BAS40-04T-7?
For technical support, including BAS40-04T-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS40-04T-7 requirements.
6.How does Aetrix verify that BAS40-04T-7 is sourced from the original manufacturer or authorized distributors?
All BAS40-04T-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 BAS40-04T-7 meets industry standards.
7.What is the process for return or replacement of BAS40-04T-7?
All BAS40-04T-7 units undergo pre-shipment inspection (PSI). If there is an issue with BAS40-04T-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 BAS40-04T-7 part is unused and in its original packaging.
Return procedure for BAS40-04T-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS40-04T-7 Tags
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