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Nexperia USA Inc. 1PS79SB40,699
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- Part No.:
- 1PS79SB40,699
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
1PS79SB40,699.pdf
- Description:
- DIODE SCHOTTKY 40V 120MA SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:8,259
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Product details
Overview
1PS79SB40,699 from Nexperia is a general-purpose Schottky diode in SOD523 (SC-79) package, rated for 40 V reverse voltage, 120 mA forward current, and 380 mV forward voltage at 1 mA. It delivers ultra-high-speed switching with low leakage (≤10 µA at 40 V), low capacitance (5 pF), and AEC-Q101 qualification for automotive use.
For engineers reviewing the 1PS79SB40,699 datasheet, 1PS79SB40,699 pinout, 1PS79SB40,699 application, or 1PS79SB40,699 equivalent, key selection criteria include junction-to-ambient thermal resistance (450 K/W), cathode-marked SOD523 footprint compatibility, clamping performance under transient conditions, and suitability for space-constrained DC-DC feedback paths.
Technical Context
This Schottky diode leverages a planar silicon structure optimized for low forward voltage and fast recovery-no minority carrier storage delay. Its 5 pF capacitance at 0 V and <10 µA reverse leakage at 40 V support high-frequency clamping in power supply feedback loops and signal line protection.
The device operates across −65 °C to +150 °C ambient and junction temperatures, with thermal resistance defined on FR4 PCB (single-sided copper, standard footprint). AEC-Q101 qualification confirms robustness against temperature cycling, humidity, and mechanical stress in automotive ECUs and body control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 40 V - Maximum blocking capability without breakdown in clamp or flyback configurations |
| Forward Current (IF) | 120 mA continuous - Supports moderate-current rectification in compact DC-DC converters |
| Forward Voltage (VF) | 380 mV @ 1 mA - Enables low-loss biasing and sensing in precision voltage reference paths |
| Reverse Leakage (IR) | 10 µA @ 40 V - Ensures minimal standby power loss in battery-backed circuits |
| Capacitance (Cd) | 5 pF @ 0 V, 1 MHz - Preserves signal integrity in >100 MHz RF detector or ESD clamp applications |
| Junction Temp (Tj) | 150 °C max - Allows operation in under-hood automotive environments without derating |
| Thermal Resistance | 450 K/W (j-a, free air) - Defines power dissipation limit (~270 mW at ΔT = 125 K) on standard FR4 |
Pinout & Package
Package: SOD523 (SC-79), plastic surface-mount, 1.2 mm × 0.8 mm × 0.6 mm body, cathode indicated by marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to lower-potential node in forward conduction; marking bar aligns with this pin |
| 2 | Anode (A) | Connected to higher-potential node; current flows from Pin 2 to Pin 1 when forward-biased |
Key Features
| Feature | Design Value |
|---|---|
| High switching speed | No minority carrier storage → sub-nanosecond recovery enables >100 MHz clamping |
| Low leakage current | ≤1 µA @ 30 V ensures <1 µW standby loss in always-on sensor bias networks |
| AEC-Q101 qualification | Validated for automotive Grade 2 (−40 °C to +105 °C ambient) per stress test requirements |
| Ultra-small footprint | SOD523 outline fits 1.2 mm × 0.8 mm PCB area - ideal for wearables and TWS earbud PCBs |
Applications
| USB Data Line Protection | DC-DC Converter Feedback Clamp |
|---|---|
Use Scenario: Protecting USB 2.0 D+/D− lines from ESD transients and overvoltage events. IC Role / Device Role: Low-capacitance clamping diode shunting surge energy to ground or VBUS. Use Value: 5 pF capacitance avoids signal integrity degradation; 40 V VR withstands VBUS coupling during hot-plug. |
Use Scenario: Clamping feedback node of buck converter IC to prevent regulation error during load dump. IC Role / Device Role: Fast-acting voltage limiter tied between FB pin and output rail. Use Value: 380 mV VF ensures precise clamping threshold; 120 mA IF handles transient currents without saturation. |
| Automotive LED Driver Flyback Snubber | Low-Power Sensor Bias Network |
Use Scenario: Suppressing inductive kickback in 12 V automotive LED headlamp drivers. IC Role / Device Role: Freewheeling path for inductor current during MOSFET off-time. Use Value: AEC-Q101 rating guarantees reliability under vibration/thermal cycling; 150 °C Tj supports under-hood placement. |
Use Scenario: Providing stable bias current to Hall-effect or thermistor sensors in battery-powered modules. IC Role / Device Role: Temperature-stable current source element in resistor-diode bias network. Use Value: Low IR (<1 µA @ 30 V) minimizes quiescent drain; consistent VF vs. temperature improves measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RB521S-40T1G | Higher VF (450 mV @ 1 mA), same VR (40 V), SOD-523 package | Less suitable for ultra-low-loss bias networks; acceptable for general clamping | Prefer when cost sensitivity outweighs VF-critical performance |
| BAS40-04 | Higher IR (20 µA @ 40 V), TO-236AB (SOT-23) package, larger footprint | Not AEC-Q101 qualified; unsuitable for automotive production | Select only for non-automotive industrial prototypes where board space is not constrained |
Compared with RB521S-40T1G and BAS40-04, the 1PS79SB40,699 offers the lowest VF and certified automotive qualification in the smallest footprint-making it optimal for space- and efficiency-critical automotive and portable designs.
Availability
1PS79SB40,699 is available at Aetrix Electronics and suitable for automotive body control modules, USB-C port protection circuits, and compact DC-DC converter feedback paths requiring stable component supply and long-term lifecycle assurance.
Supply support for 1PS79SB40,699 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 manufacturing rooted in process technology leadership and automotive-grade quality systems.
The 1PS79SB40,699 belongs to Nexperia's general-purpose Schottky diode product line, engineered for cost-effective, space-efficient voltage clamping and high-speed switching in automotive, computing, and consumer power management.
FAQ
Is the 1PS79SB40,699 suitable for automotive applications?
Yes. It is fully qualified to AEC-Q101 standards, including temperature cycling, humidity testing, and mechanical shock validation. Its −65 °C to +150 °C operating range and 150 °C maximum junction temperature meet requirements for engine bay and infotainment modules.
What is the meaning of the 'T' marking on the device?
The 'T' marking code identifies the 1PS79SB40,699 per Nexperia's ordering system and corresponds to the SOD523 package variant. The cathode is marked by a bar adjacent to Pin 1, confirming polarity orientation during automated optical inspection and placement.
How does thermal resistance change with PCB layout?
Rth(j-a) is specified at 450 K/W for a single-sided FR4 board with standard SOD523 footprint. Adding thermal vias or copper pour reduces resistance significantly-e.g., two 0.3 mm vias under the cathode pad can lower Rth(j-a) to ~320 K/W, enabling ~400 mW dissipation at 125 K ΔT.
Can this diode replace BAS40 in existing designs?
Yes, with layout adaptation: both share 40 V VR and Schottky architecture, but 1PS79SB40,699 uses SOD523 (vs. SOT-23 for BAS40), requires reflow footprint update, and offers lower VF (380 mV vs. ~440 mV) and tighter IR (10 µA vs. 20 µA), improving efficiency in bias networks.
1PS79SB40,699 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
- Operating Temperature - Junction:
- 150°C (Max)
1PS79SB40,699 FAQ
1.How can I place an order for 1PS79SB40,699 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PS79SB40,699 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 1PS79SB40,699 reliable?
The price and inventory of 1PS79SB40,699 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PS79SB40,699 is usually 5 days.
3.What payment methods are accepted for 1PS79SB40,699?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PS79SB40,699 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PS79SB40,699?
1PS79SB40,699 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PS79SB40,699 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 1PS79SB40,699?
For technical support, including 1PS79SB40,699 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PS79SB40,699 requirements.
6.How does Aetrix verify that 1PS79SB40,699 is sourced from the original manufacturer or authorized distributors?
All 1PS79SB40,699 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 1PS79SB40,699 meets industry standards.
7.What is the process for return or replacement of 1PS79SB40,699?
All 1PS79SB40,699 units undergo pre-shipment inspection (PSI). If there is an issue with 1PS79SB40,699, 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 1PS79SB40,699 part is unused and in its original packaging.
Return procedure for 1PS79SB40,699:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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