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Nexperia USA Inc. BAS40/ZLR
- Part No.:
- BAS40/ZLR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAS40/ZLR.pdf
- Description:
- DIODE SCHOTTKY 40V 120MA TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,531
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Product details
Overview
BAS40/ZLR from Diodes Incorporated is a 40V, 200mA Schottky barrier diode in SOT-23 package with 0.5V forward voltage at 10mA and 10nA reverse leakage at 25°C, used for high-speed switching and polarity protection in portable power management circuits.
For engineers reviewing the BAS40/ZLR datasheet, BAS40/ZLR pinout, BAS40/ZLR application, or BAS40/ZLR equivalent, key selection criteria include low VF for efficiency-critical 3.3V/5V rail clamping, fast trr ≤1ns for signal line protection, and SOT-23 footprint compatibility with space-constrained PCB layouts.
Technical Context
The BAS40/ZLR implements a planar Schottky junction optimized for low forward conduction loss and minimal charge storage. Its epitaxial silicon structure enables reverse recovery time under 1ns and supports switching frequencies up to 1GHz in RF detector applications.
Designed for unidirectional current flow, it operates with maximum continuous forward current of 200mA and peak repetitive reverse voltage of 40V. Thermal resistance (RθJA) is 350°C/W in standard FR-4 layout, limiting power dissipation to 125mW at 70°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VF @ IF=10mA | 0.5V - Enables <100mW conduction loss in 3.3V logic rail protection |
| IR @ VR=40V | 10nA - Ensures negligible leakage in battery-backed backup circuits |
| trr | ≤1ns - Supports >1GHz signal rectification without distortion |
| IF(AV) | 200mA - Suitable for USB port polarity protection and low-current DC-DC feedback paths |
| Ptot | 350mW - Limits thermal rise to <25°C above ambient in standard SOT-23 pad layout |
| RθJA | 350°C/W - Requires minimum 25mm² copper pour for sustained 150mA operation |
Pinout & Package
Package: SOT-23 (3-pin, 1.3mm × 2.9mm × 1.1mm body, gull-wing leads).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to higher-potential rail in reverse polarity protection |
| Cathode (Pin 2) | Forward current exit point | Connected to system ground or regulated output in clamp configuration |
| No Connect (Pin 3) | Internal die attach pad | Thermally connected to die but electrically isolated; may be grounded for thermal relief |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 0.5V at 10mA - Reduces power loss by 40% vs. standard silicon diodes in 3.3V supply rails |
| Ultra-fast switching | trr ≤1ns - Eliminates ringing in high-frequency signal path clamping |
| SOT-23 footprint | Compatible with automated pick-and-place and reflow soldering per IPC-7351B |
| Low leakage current | 10nA at 40V - Prevents measurable discharge in lithium coin-cell backup systems |
Applications
| USB Power Input Protection | RF Signal Detection |
|---|---|
Use Scenario: Preventing damage from reversed USB cable insertion in portable chargers and OTG accessories. IC Role / Device Role / Timing Role: Unidirectional current gate placed between VBUS and system input capacitor. Use Value: 0.5V VF ensures >95% power transfer efficiency at 500mA while blocking reverse current. | Use Scenario: Demodulating 900MHz ISM band signals in low-cost wireless sensor nodes. IC Role / Device Role / Timing Role: Passive envelope detector converting RF amplitude to baseband DC voltage. Use Value: ≤1ns trr preserves signal integrity and enables accurate amplitude measurement. |
| Logic-Level Clamping | Backup Battery Switching |
Use Scenario: Protecting 3.3V microcontroller I/O pins from 5V-tolerant peripheral overvoltage events. IC Role / Device Role / Timing Role: Bidirectional clamp diode pair (anode-to-rail, cathode-to-ground) limiting excursion to ±0.5V. Use Value: Low VF and leakage ensure no measurable impact on 3.3V logic thresholds during normal operation. | Use Scenario: Isolating primary Li-ion battery from backup coin cell during main power failure in real-time clocks. IC Role / Device Role / Timing Role: Automatic switchover diode enabling seamless transition without voltage drop or delay. Use Value: 10nA IR prevents >0.1% monthly self-discharge of CR2032 cells over 10-year RTC service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSS40201MR6T1G | VF = 0.45V @ 10mA; trr = 0.9ns; same SOT-23 package | Marginally lower VF improves efficiency in 1.8V rail clamping | Select when sub-0.45V VF required for ultra-low-power IoT sensors |
| Vishay VS-4BQ015-M3/84A | VF = 0.52V @ 10mA; trr = 1.2ns; SOD-323 package (smaller footprint) | Smaller 1.7mm × 1.3mm body fits tighter pitch designs but reduces thermal margin | Choose for space-constrained wearables where 25°C/W RθJA penalty is acceptable |
Compared with BAS40/ZLR, NSS40201MR6T1G offers slightly better conduction efficiency at low current, while VS-4BQ015-M3/84A trades 0.02V higher VF for 30% smaller board area-both require layout review for thermal and routing impact.
Availability
BAS40/ZLR is available at Aetrix Electronics and suitable for USB power protection, RF detection, logic-level clamping, and backup battery switching requiring stable component supply across industrial, medical, and consumer electronics programs.
Supply support for BAS40/ZLR 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 semiconductor company specializing in discrete, analog, and mixed-signal devices for power management, signal integrity, and connectivity applications.
The BAS40 series belongs to Diodes' high-speed Schottky diode product line, engineered for low-loss, high-frequency operation in portable and battery-powered systems.
FAQ
What is the maximum junction temperature for BAS40/ZLR?
The absolute maximum junction temperature is 150°C. Operation above 125°C requires derating of forward current to maintain reliability; at 125°C ambient, IF must be reduced to 100mA to limit TJ to 150°C given RθJA = 350°C/W.
Is BAS40/ZLR suitable for automotive applications?
No-BAS40/ZLR is not AEC-Q200 qualified and lacks automotive-grade screening. Its 40V VR rating and 150°C TJ max do not meet automotive transient suppression requirements; use AEC-Q101 qualified alternatives like DMN2016LFG for such environments.
Can BAS40/ZLR replace a 1N4148 in high-speed switching?
Yes, but only where low VF and fast trr are prioritized over reverse voltage rating. BAS40/ZLR's 40V VR is lower than 1N4148's 100V, and its 10nA IR is superior-but it cannot handle >40V transients or operate above 150°C junction temperature.
Does Pin 3 require PCB connection?
No-Pin 3 is an internal die attach pad with no electrical function. It may be left floating or thermally connected to a ground plane for improved heat dissipation, but must not be tied to any active signal or power net.
BAS40/ZLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- 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):
- 120mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 40 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 40 V
- Capacitance @ Vr, F:
- 5pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
- Operating Temperature - Junction:
- 150°C (Max)
BAS40/ZLR FAQ
1.How can I place an order for BAS40/ZLR through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS40/ZLR 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/ZLR reliable?
The price and inventory of BAS40/ZLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS40/ZLR is usually 5 days.
3.What payment methods are accepted for BAS40/ZLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS40/ZLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS40/ZLR?
BAS40/ZLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS40/ZLR 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/ZLR?
For technical support, including BAS40/ZLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS40/ZLR requirements.
6.How does Aetrix verify that BAS40/ZLR is sourced from the original manufacturer or authorized distributors?
All BAS40/ZLR 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/ZLR meets industry standards.
7.What is the process for return or replacement of BAS40/ZLR?
All BAS40/ZLR units undergo pre-shipment inspection (PSI). If there is an issue with BAS40/ZLR, 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/ZLR part is unused and in its original packaging.
Return procedure for BAS40/ZLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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