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Nexperia USA Inc. 1PS79SB30Z
- Part No.:
- 1PS79SB30Z
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
1PS79SB30Z.pdf
- Description:
- 1PS79SB30/SOD523/SC-79
- Quantity:
- Payment:
- Shipping:
Inventory:9,639
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Product details
Overview
1PS79SB30Z from Nexperia is a planar Schottky barrier diode with integrated guard ring for stress protection, rated at 40 V reverse voltage and 200 mA forward current, featuring 320–360 mV forward voltage at 10 mA and 25 °C, housed in an ultra-small SOD523 (SC-79) surface-mount package. It serves as a high-speed switching or clamping element in space-constrained DC-DC converter feedback paths and USB power rail protection circuits.
For engineers reviewing the 1PS79SB30Z datasheet, 1PS79SB30Z pinout, 1PS79SB30Z application, or 1PS79SB30Z equivalent, key selection criteria include its low VF (≤360 mV @10 mA), sub-0.5 µA IR at 25 V, 20 pF capacitance at 1 V, AEC-Q101 qualification, and SC-79 footprint compatibility with automated placement on dense PCBs.
Technical Context
This Schottky diode employs a planar junction structure with an integrated guard ring to suppress edge breakdown under transient stress, enabling reliable operation in automotive-grade environments. Its low-barrier metal-semiconductor interface delivers fast recovery (no minority-carrier storage) and minimal forward conduction loss.
The device operates across −65 °C to +150 °C ambient and junction temperatures, with thermal resistance of 450 K/W (junction-to-ambient, FR4 single-sided copper). It is specified for repetitive peak forward current up to 300 mA and non-repetitive surge capability of 1 A (8.3 ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 40 V - Maximum blocking capability before avalanche onset; suitable for 3.3 V/5 V/12 V rail clamping without derating. |
| Forward Current (IF) | 200 mA continuous - Supports moderate-power signal path isolation or biasing in portable electronics. |
| Forward Voltage (VF) | 320–360 mV @10 mA, 25 °C - Enables <100 mW conduction loss in 10 mA bias networks; critical for low-drop detector circuits. |
| Reverse Current (IR) | ≤0.5 µA @25 V, pulsed - Ensures minimal leakage in high-impedance voltage clamp or level-shift nodes. |
| Diode Capacitance (Cd) | 20 pF @1 V, 1 MHz - Limits high-frequency impedance rise; appropriate for ≤100 MHz signal routing or ESD-coupled clamps. |
| Junction Temperature (Tj) | 150 °C max - Allows operation in under-hood automotive modules or thermally dense power management IC proximity. |
Pinout & Package
Encapsulated in the SOD523 (SC-79) plastic surface-mount package measuring 1.2 mm × 0.8 mm × 0.6 mm, this two-terminal diode uses a standardized footprint with tin-plated leads compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (marked side) | Cathode (K) | Connected to higher-potential node during forward bias; marking bar identifies polarity for automated optical inspection. |
| 2 | Anode (A) | Connected to lower-potential node during forward conduction; forms return path for clamped transients or switched currents. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring protection | Suppresses edge-related avalanche at cathode periphery, improving robustness against ESD and line transients per IEC 61000-4-2 Level 4. |
| Ultra-low VF | 320–360 mV @10 mA enables >95% efficiency in low-current bias networks where silicon diodes would drop ≥600 mV. |
| AEC-Q101 qualified | Qualified per Automotive Electronics Council stress test standard, supporting use in engine control, body electronics, and ADAS power domains. |
| SOD523 footprint | 1.2 mm × 0.8 mm body allows placement in <1.5 mm pitch layouts, reducing board area by 60% vs. SOD323 in wearables and sensor nodes. |
Applications
| USB Power Switch Clamping | DC-DC Converter Feedback Diode |
|---|---|
Use Scenario: Clamp overvoltage transients on USB VBUS lines during hot-plug events or cable inductance spikes. IC Role / Device Role / Timing Role: Fast-turn-on shunt diode placed between VBUS and 5 V rail to divert surge energy before LDO input overstress. Use Value: 320–360 mV VF ensures clamping begins near 5.3 V, avoiding false triggering while maintaining <10 ns response to 1 kV/µs edges. |
Use Scenario: Isolate feedback voltage divider from output ripple in synchronous buck converters operating above 2 MHz. IC Role / Device Role / Timing Role: Blocking diode in optocoupler-coupled feedback path to prevent reverse current injection into error amplifier. Use Value: 20 pF capacitance minimizes phase lag in 100 kHz–1 MHz compensation networks, preserving loop stability margin. |
| Automotive CAN Transceiver Protection | Low-Power Sensor Bias Network |
Use Scenario: Protect CANH/CANL pins of transceivers from load-dump-induced reverse polarity surges in 12 V vehicle systems. IC Role / Device Role / Timing Role: Reverse-polarity blocking diode in supply path to transceiver VCC, preventing backfeed during battery disconnect. Use Value: AEC-Q101 qualification and 150 °C Tj rating ensure uninterrupted operation during under-hood thermal cycling (−40 °C to +125 °C). |
Use Scenario: Provide stable bias current to MEMS pressure sensor bridges in battery-powered IoT nodes with 10-year shelf life requirements. IC Role / Device Role / Timing Role: Low-leakage series diode in precision current source to isolate sensor from supply noise and enable zero-crossing detection. Use Value: ≤0.5 µA IR at 25 V limits standby current drift to <1 nA/°C, preserving calibration accuracy over temperature and time. |
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 NSR0230HT1G | Same SOD-523 package; VF = 370 mV @10 mA (higher by 50 mV); IR = 1.5 µA @25 V (3× higher leakage). | Marginally higher conduction loss reduces efficiency in 10–100 mA bias rails; less suitable for ultra-low-leakage sensor bias. | Select when cost sensitivity outweighs 50 mV VF penalty and leakage is not critical. |
| Vishay VSKY1204-H | SC-79 package; VR = 45 V; VF = 340 mV @10 mA; IR = 0.3 µA @25 V; not AEC-Q101 qualified. | Higher VR supports 24 V industrial rails but lacks automotive qualification; unsuitable for automotive ECU designs. | Prefer for industrial 24 V systems requiring tighter IR spec but no automotive compliance. |
Compared with NSR0230HT1G and VSKY1204-H, the 1PS79SB30Z uniquely combines AEC-Q101 qualification, lowest IR among SOD523 Schottkys, and guard ring-enhanced surge immunity-making it optimal for automotive and high-reliability portable power management where leakage, transient robustness, and qualification are jointly critical.
Availability
1PS79SB30Z is available at Aetrix Electronics and suitable for USB power protection, DC-DC feedback isolation, automotive CAN transceiver supply, and low-leakage sensor bias networks requiring stable component supply across extended production lifecycles.
Supply support for 1PS79SB30Z 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 automotive-qualified components and advanced packaging.
The 1PS79SB30Z belongs to Nexperia's AEC-Q101-qualified Schottky diode portfolio, engineered specifically for space-constrained, high-speed power management in automotive and portable electronics where low VF, low IR, and transient robustness are co-critical.
FAQ
Is 1PS79SB30Z suitable for automotive applications?
Yes. The device is fully qualified to AEC-Q101 for discrete semiconductors, tested for temperature cycling, humidity, mechanical shock, and ESD per automotive stress standards. Its 150 °C maximum junction temperature and guard ring design support deployment in engine control units, body control modules, and ADAS power supplies.
What is the thermal resistance of 1PS79SB30Z in typical PCB layout?
The junction-to-ambient thermal resistance is 450 K/W when mounted on a standard FR4 PCB with single-sided 1 oz copper and the manufacturer-recommended SOD523 footprint. This value assumes free-air convection and excludes thermal vias or copper pour enhancements.
How does the guard ring improve reliability?
The integrated guard ring redistributes electric field intensity at the cathode edge, suppressing premature avalanche breakdown during voltage transients. This extends surge lifetime under repetitive 1 kV ESD pulses and improves long-term stability in high-humidity automotive environments.
Can 1PS79SB30Z replace a standard silicon diode in a 5 V rail clamp?
Yes, provided the application requires fast switching and low forward drop. With VF ≈340 mV vs. ~700 mV for silicon, it reduces conduction loss by >50%. However, its 40 V VR limits use to ≤5 V systems unless derated; silicon diodes with higher VR may be needed for 12 V+ clamping.
1PS79SB30Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 600 mV @ 200 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 nA @ 40 V
- Capacitance @ Vr, F:
- 20pF @ 1V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
- Operating Temperature - Junction:
- 150°C
1PS79SB30Z FAQ
1.How can I place an order for 1PS79SB30Z through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PS79SB30Z 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 1PS79SB30Z reliable?
The price and inventory of 1PS79SB30Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PS79SB30Z is usually 5 days.
3.What payment methods are accepted for 1PS79SB30Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PS79SB30Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PS79SB30Z?
1PS79SB30Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PS79SB30Z 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 1PS79SB30Z?
For technical support, including 1PS79SB30Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PS79SB30Z requirements.
6.How does Aetrix verify that 1PS79SB30Z is sourced from the original manufacturer or authorized distributors?
All 1PS79SB30Z 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 1PS79SB30Z meets industry standards.
7.What is the process for return or replacement of 1PS79SB30Z?
All 1PS79SB30Z units undergo pre-shipment inspection (PSI). If there is an issue with 1PS79SB30Z, 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 1PS79SB30Z part is unused and in its original packaging.
Return procedure for 1PS79SB30Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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