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Nexperia USA Inc. BAT165AX
- Part No.:
- BAT165AX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BAT165AX.pdf
- Description:
- DIODE SCHOTTKY 40V 500MA SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:87,953
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Product details
Overview
BAT165AX from Nexperia is a medium-power Schottky barrier rectifier in SOD323 (SC-76) package, designed for low-voltage DC/DC conversion and reverse polarity protection. It delivers 0.75 A average forward current, 40 V reverse voltage rating, 640 mV typical forward voltage at 750 mA, 1.5 µA typical reverse leakage at 30 V/25 °C, and features an integrated guard ring for stress protection.
For engineers reviewing the BAT165AX datasheet, BAT165AX pinout, BAT165AX application, or BAT165AX equivalent, key selection criteria include low VF for efficiency-critical 3.3 V/5 V rail rectification, thermal performance on FR4 PCBs, SOD323 footprint compatibility, and reverse leakage behavior across −40 °C to 125 °C operating range.
Technical Context
This Schottky diode uses a planar silicon structure with guard ring termination to suppress edge breakdown and improve reliability under transient stress. Its low junction capacitance (9–12 pF at 10 V) supports high-frequency switching in DC/DC converters up to several hundred kHz.
The device operates with junction temperatures up to 150 °C and exhibits thermally stable forward voltage drop - VF increases only ~0.3 mV/°C over 25–125 °C - enabling predictable conduction loss modeling in thermally constrained layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 40 V - maximum blocking capability for 3.3 V/5 V/12 V system inputs without avalanche risk |
| Forward Current (IF) | 0.75 A - peak repetitive current handling for compact power stage designs |
| Forward Voltage (VF) | 640 mV typ. at 750 mA - reduces conduction loss by >30% vs. standard PN diodes in same package |
| Reverse Leakage (IR) | 1.5 µA typ. at 30 V/25 °C - enables low-quiescent-current bias networks and battery backup paths |
| Junction-to-Ambient Rth | 330 K/W - defines thermal derating on standard FR4 PCB; limits continuous IF(AV) to 0.5 A at Tamb = 93 °C |
| Capacitance (Cd) | 9–12 pF at 10 V - minimizes switching node ringing and EMI in high-dV/dt synchronous rectifier circuits |
Pinout & Package
Encapsulated in SOD323 (SC-76), a 1.7 mm × 1.25 mm × 0.95 mm surface-mount plastic package with 1.3 mm lead pitch and standard FR4-compatible footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to higher-potential node in reverse polarity protection; carries full load current during forward conduction |
| 2 | Anode (A) | Connected to lower-potential node (e.g., ground or return path); forms cathode-anode junction for unidirectional conduction |
Key Features
| Feature | Design Value |
|---|---|
| Integrated guard ring | Prevents premature edge breakdown under voltage transients, improving surge robustness in industrial DC inputs |
| Low VF at high current density | 640 mV @ 750 mA enables <120 mW conduction loss in 5 V/0.5 A buck converter output stage |
| Small thermal resistance to solder point | Rth(j-sp) = 225 K/W - allows direct thermal coupling to copper pour for improved power handling on cost-sensitive PCBs |
| Wide temperature operation | Specified from −55 °C to 150 °C junction - supports automotive under-hood auxiliary rails and industrial motor control logic supplies |
Applications
| Low-Voltage Rectification | High-Efficiency DC/DC Conversion |
|---|---|
Use Scenario: Rectifying 3.3 V or 5 V secondary-side outputs in isolated flyback or forward converters. IC Role / Device Role / Timing Role: Unidirectional current valve placed between transformer secondary and output capacitor. Use Value: 640 mV VF minimizes voltage drop and improves regulation accuracy within ±2% tolerance bands. | Use Scenario: Output rectification in non-synchronous buck or boost converters operating at 300–500 kHz. IC Role / Device Role / Timing Role: Freewheeling diode conducting during low-side switch off-time. Use Value: 9–12 pF capacitance limits reverse recovery charge, reducing switching losses and EMI generation. |
| Reverse Polarity Protection | Low-Power Consumption Systems |
Use Scenario: Series-connected protection for USB-powered peripherals or battery-backed sensors. IC Role / Device Role / Timing Role: Cathode-up series diode blocking reverse input connection. Use Value: 1.5 µA IR at 25 °C ensures <1.5 µW standby loss in 3 V systems, preserving battery life over years. | Use Scenario: Power path management in always-on IoT nodes with coin-cell or energy-harvesting sources. IC Role / Device Role / Timing Role: Isolation element preventing backfeed between multiple supply domains. Use Value: Guard ring and 150 °C Tj rating support reliable operation in sealed enclosures with passive thermal buildup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSSR0740MX | Same SOD323 package; VF = 620 mV typ. at 750 mA; IR = 2.0 µA at 30 V/25 °C | Slightly lower VF but higher leakage; identical thermal resistance and VR rating | Preferred where sub-630 mV VF is critical and leakage <5 µA is acceptable |
| Vishay SS12 | SOD-123 package (larger: 2.7 mm × 1.6 mm); VF = 550 mV typ. at 1 A; VR = 20 V | Higher current rating but halved VR; incompatible footprint and layout | Only suitable when board redesign permits larger package and system VR ≤ 20 V |
Compared with NSSR0740MX and SS12, BAT165AX offers optimal balance of ultra-low profile (SOD323), 40 V blocking, and verified 1.5 µA leakage at 30 V - making it preferred for space-constrained 5 V/12 V industrial modules requiring long-term stability.
Availability
BAT165AX is available at Aetrix Electronics and suitable for low-voltage rectification, high-efficiency DC/DC conversion, and reverse polarity protection requiring stable component supply across industrial automation, IoT sensor nodes, and portable medical devices.
Supply support for BAT165AX 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in Schottky diodes, MOSFETs, and ESD protection.
BAT165AX belongs to Nexperia's medium-power Schottky rectifier product line, engineered for space-efficient, thermally robust operation in consumer, industrial, and computing power supplies.
FAQ
What is the maximum allowable junction temperature for BAT165AX?
The absolute maximum junction temperature is 150 °C per IEC 60134 limiting values. Continuous operation above this threshold risks irreversible degradation of the Schottky barrier. Derating curves in Figures 8–9 define safe IF(AV) limits based on ambient or solder-point temperature, with full 0.5 A rating only achievable below 93 °C ambient on standard FR4.
Can BAT165AX be used in automotive applications?
No - BAT165AX is explicitly marked as non-automotive qualified in its revision history. It lacks AEC-Q101 qualification, automotive-grade screening, and guaranteed performance over −40 °C to +125 °C case temperature. For automotive use, Nexperia recommends BAT165AQ or equivalent qualified variants.
How does the guard ring affect surge withstand capability?
The integrated guard ring redistributes electric field at the die edge, suppressing premature avalanche and increasing non-repetitive peak forward surge current (IFSM) to 8 A (8 ms square wave). This enables reliable operation during cold-swap events or input capacitor inrush in industrial 24 V systems without external TVS clamping.
Is BAT165AX compatible with lead-free reflow soldering profiles?
Yes - the SOD323 package is rated for standard IPC/JEDEC J-STD-020D-compliant lead-free reflow, with peak temperature up to 260 °C. Figure 14 specifies recommended solder land geometry (0.5 mm × 1.5 mm pads, 0.6 mm solder resist opening), and thermal characteristics assume tin-plated copper PCB construction.
BAT165AX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- 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):
- 500mA
- Voltage - Forward (Vf) (Max) @ If:
- 740 mV @ 750 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 8 µA @ 40 V
- Capacitance @ Vr, F:
- 9pF @ 10V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
- Operating Temperature - Junction:
- 150°C (Max)
BAT165AX FAQ
1.How can I place an order for BAT165AX through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT165AX 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 BAT165AX reliable?
The price and inventory of BAT165AX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT165AX is usually 5 days.
3.What payment methods are accepted for BAT165AX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT165AX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT165AX?
BAT165AX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT165AX 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 BAT165AX?
For technical support, including BAT165AX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT165AX requirements.
6.How does Aetrix verify that BAT165AX is sourced from the original manufacturer or authorized distributors?
All BAT165AX 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 BAT165AX meets industry standards.
7.What is the process for return or replacement of BAT165AX?
All BAT165AX units undergo pre-shipment inspection (PSI). If there is an issue with BAT165AX, 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 BAT165AX part is unused and in its original packaging.
Return procedure for BAT165AX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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