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Diodes Incorporated BAS40-04Q-7-F
- Part No.:
- BAS40-04Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAS40-04Q-7-F.pdf
- Description:
- DIODE ARR SCHOT 40V 200MA SOT233
- Quantity:
- Payment:
- Shipping:
Inventory:13,475
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Product details
Overview
BAS40-04Q-7-F from Diodes Incorporated is a 40 V, 200 mA surface-mount Schottky barrier diode in SOT23 package, featuring 380 mV forward voltage at 1 mA, 5.0 ns reverse recovery time, and PN junction guard ring for ESD/transient protection-used in automotive power rail clamping and low-loss DC-DC converter freewheeling paths.
For engineers reviewing the BAS40-04Q-7-F datasheet, BAS40-04Q-7-F pinout, BAS40-04Q-7-F application, or BAS40-04Q-7-F equivalent, key selection criteria include low VF for efficiency-critical bias networks, AEC-Q101 qualification for automotive use, IR < 200 nA at 30 V for standby leakage control, and SOT23 thermal resistance of 357 °C/W under standard FR-4 mounting.
Technical Context
This Schottky diode employs a planar epitaxial structure with integrated PN junction guard ring to suppress edge breakdown and improve transient robustness without compromising switching speed. Its low barrier height enables sub-400 mV forward drop at light loads while maintaining 40 V reverse blocking capability.
The device operates across –55 °C to +125 °C and delivers 5.0 ns reverse recovery (IF = IR = 10 mA, RL = 100 Ω), making it suitable for high-frequency rectification in buck converter outputs and signal-level clamping where fast turn-off minimizes cross-conduction loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage before breakdown; sets upper limit for clamping or blocking applications. |
| IF(AV) | 200 mA - Continuous forward current rating; defines steady-state power delivery capacity in freewheeling paths. |
| VF Max | 380 mV @ 1 mA - Low forward voltage ensures minimal conduction loss in low-current bias and sensing circuits. |
| trr | 5.0 ns - Fast reverse recovery enables operation up to ~70 MHz in switching regulators without significant tail current loss. |
| IR Max | 200 nA @ 30 V - Ultra-low leakage preserves battery life in always-on automotive modules and sensor bias rails. |
| RθJA | 357 °C/W - Thermal resistance on FR-4 board determines maximum power dissipation (350 mW) before exceeding 125 °C junction temperature. |
Pinout & Package
Package: SOT23 (Standard), molded plastic, UL 94V-0 rated, moisture sensitivity level 1 per J-STD-020, 0.008 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to higher-potential node in rectification or clamping; polarity-marked on top view with cathode band. |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Connected to lower-potential node; carries full reverse voltage during off-state; marked by cathode band on package top. |
| NC (Pin 3) | No connection | Internally unconnected; electrically isolated; must not be tied to any net to avoid parasitic coupling or mechanical stress. |
Key Features
| Feature | Design Value |
|---|---|
| PN junction guard ring | Suppresses edge breakdown and improves ESD robustness to >8 kV HBM without degrading trr or VF. |
| AEC-Q101 qualification | Validated for automotive underhood applications including engine control units and body electronics requiring PPAP documentation. |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU with <900 ppm Br/Cl and <1000 ppm Sb; supports green manufacturing requirements. |
| Low capacitance (5.0 pF) | Minimizes signal distortion in RF detector and high-speed logic clamp applications operating above 100 MHz. |
Applications
| Automotive Power Rail Clamping | Low-Power DC-DC Converter Freewheeling |
|---|---|
Use Scenario: Suppressing load dump transients on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Bidirectional clamping diode placed between supply rail and ground to shunt surge energy within nanoseconds. Use Value: Guard ring design withstands repeated 40 V/100 ms pulses without parameter shift; AEC-Q101 qualification ensures reliability over 15-year vehicle lifetime. | Use Scenario: Freewheeling path in 3.3 V synchronous buck converter powering microcontroller I/O banks. IC Role / Device Role / Timing Role: Discontinuous conduction mode (DCM) flyback diode conducting only during switch-off phase. Use Value: 380 mV VF at 1 mA reduces no-load power loss by 65% vs. standard silicon diodes; 5 ns trr prevents shoot-through in 2 MHz switching designs. |
| Signal-Level Voltage Clamping | Low-Leakage Sensor Bias Network |
Use Scenario: Protecting ADC input pins from ESD events in industrial temperature sensors. IC Role / Device Role / Timing Role: Input clamp diode limiting voltage excursions to ±0.3 V beyond supply rails. Use Value: 4.0 pF CT and 200 nA IR at 30 V preserve signal integrity and minimize offset drift in precision 24-bit measurement systems. | Use Scenario: Providing stable bias current to photodiode anodes in battery-powered smoke detectors. IC Role / Device Role / Timing Role: Reverse-biased reference diode establishing fixed leakage-controlled current source. Use Value: IR ≤ 200 nA at 30 V ensures <1 µA total quiescent current draw, extending 10-year lithium primary cell life by >22%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBAT54AWT1G | Same SOT23-3 package, 30 V VRRM, 200 mA IF, VF = 450 mV @ 10 mA | Limited to 30 V systems; higher VF increases conduction loss in low-voltage rails | Select when 30 V rating suffices and cost is prioritized over leakage or speed |
| NSR0230P2T5G | 30 V VRRM, 200 mA IF, VF = 370 mV @ 100 mA, IR = 100 µA @ 25 V | Higher IR compromises battery-sensitive bias networks; optimized for high-current, not low-leakage use | Prefer for high-current freewheeling where VF dominates over leakage, but avoid in always-on sensor nodes |
Compared with SBAT54AWT1G and NSR0230P2T5G, BAS40-04Q-7-F uniquely balances 40 V rating, sub-400 mV VF at low current, and <200 nA IR-making it optimal for automotive clamping and ultra-low-power biasing where both voltage margin and leakage matter.
Availability
BAS40-04Q-7-F is available at Aetrix Electronics and suitable for automotive ECU protection, portable medical sensor biasing, and industrial IoT power management requiring stable component supply across long production lifecycles.
Supply support for BAS40-04Q-7-F 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' automotive-qualified Schottky diode product line, engineered specifically for high-reliability power management and signal conditioning in harsh-environment applications demanding AEC-Q101 compliance and PPAP readiness.
FAQ
What is the maximum junction temperature for BAS40-04Q-7-F?
The device is rated for TJ = –55 °C to +125 °C. At ambient temperatures up to 85 °C, its 357 °C/W thermal resistance allows 350 mW power dissipation before reaching the 125 °C limit-provided mounted on FR-4 with recommended pad layout per Diodes' package outline AN-2001.
Is BAS40-04Q-7-F suitable for bidirectional ESD protection?
No-it is a unidirectional Schottky diode with anode and cathode terminals. For bidirectional ESD clamping, a dual-diode array like D3V3F1U2SOT23-3 is required. BAS40-04Q-7-F provides effective single-direction transient suppression when used with appropriate series impedance.
How does the PN junction guard ring affect reliability?
The guard ring eliminates premature edge breakdown under high dv/dt or reverse-bias stress, enabling stable operation during load dump events and improving HBM ESD tolerance to >8 kV. It does not increase VF or trr, preserving switching performance while extending lifetime in automotive environments.
Can BAS40-04Q-7-F replace BAS40-04-7-F in new designs?
Yes-BAS40-04Q-7-F is the AEC-Q101 qualified version of BAS40-04-7-F, sharing identical electrical specs and SOT23 footprint. The "Q" suffix denotes automotive-grade change control, PPAP capability, and IATF16949 manufacturing; use it where automotive qualification is mandatory.
BAS40-04Q-7-F 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
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BAS40-04Q-7-F FAQ
1.How can I place an order for BAS40-04Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS40-04Q-7-F 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 BAS40-04Q-7-F reliable?
The price and inventory of BAS40-04Q-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS40-04Q-7-F is usually 5 days.
3.What payment methods are accepted for BAS40-04Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS40-04Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS40-04Q-7-F?
BAS40-04Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS40-04Q-7-F 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 BAS40-04Q-7-F?
For technical support, including BAS40-04Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS40-04Q-7-F requirements.
6.How does Aetrix verify that BAS40-04Q-7-F is sourced from the original manufacturer or authorized distributors?
All BAS40-04Q-7-F 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 BAS40-04Q-7-F meets industry standards.
7.What is the process for return or replacement of BAS40-04Q-7-F?
All BAS40-04Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BAS40-04Q-7-F, 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 BAS40-04Q-7-F part is unused and in its original packaging.
Return procedure for BAS40-04Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS40-04Q-7-F Tags
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BAV99-7-F
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