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Nexperia USA Inc. 1PS79SB30-QF
- Part No.:
- 1PS79SB30-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
1PS79SB30-QF.pdf
- Description:
- 1PS79SB30-Q/SOD523/SC-79
- Quantity:
- Payment:
- Shipping:
Inventory:9,309
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Product details
Overview
1PS79SB30-QF 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, and packaged in ultra-compact SOD523 (SC-79) for space-constrained automotive signal clamping and high-speed switching.
For engineers reviewing the 1PS79SB30-QF datasheet, 1PS79SB30-QF pinout, 1PS79SB30-QF application, or 1PS79SB30-QF equivalent, key selection criteria include low VF stability across temperature, AEC-Q101 qualification, sub-20 pF capacitance at 1 V, 0.5 µA max reverse leakage at 25 V, and thermal resistance of 450 K/W on FR4 PCB.
Technical Context
This Schottky diode employs a planar junction structure with an integrated guard ring to enhance ESD and transient robustness-critical for automotive signal integrity. Its low-barrier metal-semiconductor interface delivers fast recovery (no minority carrier storage) and enables operation up to 100 MHz in clamping circuits.
The device operates within −65 °C to +150 °C ambient range and supports repetitive peak forward current up to 300 mA (tp ≤ 1 s), with non-repetitive surge capability of 1 A (8.3 ms half-sine). Junction temperature is limited to 150 °C under all operating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 40 V - Maximum DC blocking capability without breakdown; suitable for 24 V automotive rail protection. |
| Forward Current (IF) | 200 mA continuous - Supports sustained biasing in sensor interface and logic-level translation paths. |
| Forward Voltage (VF) | 320–360 mV @ 10 mA, 25 °C - Enables minimal conduction loss in low-power signal routing and level-shifting. |
| Reverse Leakage (IR) | ≤0.5 µA @ 25 V, pulsed - Ensures negligible standby current in battery-backed systems and always-on nodes. |
| Diode Capacitance (Cd) | 20 pF @ 1 V, 1 MHz - Low capacitance preserves signal edge integrity in >10 MHz digital or RF detector applications. |
| Thermal Resistance (Rth(j-a)) | 450 K/W - Defines power dissipation limit (~111 mW) on standard FR4 PCB with single-sided copper. |
| Junction Temperature (Tj) | 150 °C max - Enables reliable operation in under-hood automotive environments with localized heating. |
Pinout & Package
Encapsulated in the SOD523 (SC-79) surface-mount package: 1.2 mm × 0.8 mm × 0.6 mm body, ultra-flat profile optimized for automated placement and board-space efficiency in dense automotive ECUs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Marked side (bar) - Connected to higher-potential node during forward conduction; primary path for clamped energy return. |
| 2 | Anode (A) | Unmarked side - Tied to signal source or rail being protected; forms low-VF forward path to cathode. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring integration | Enhances ESD robustness (IEC 61000-4-2 Level 4) and improves long-term reliability under voltage transients. |
| Ultra-low VF dispersion | Typical VF = 320–360 mV at 10 mA ensures consistent threshold behavior across production lots and temperature. |
| AEC-Q101 qualification | Validated for automotive use per stress test requirements including HTGB, HTRB, and temperature cycling. |
| SOD523 footprint compatibility | Standardized 0.5 mm pitch, 0.4 mm pad width - compatible with IPC-7351B SC-79 land pattern for reflow yield. |
Applications
| Automotive CAN Transceiver Protection | USB 2.0 Data Line Clamping |
|---|---|
Use Scenario: Protecting CANH/CANL pins against ISO 7637-2 pulse 1/2a transients in body control modules. IC Role / Device Role / Timing Role: Bidirectional clamping diode placed between data line and VCC/GND rails to shunt ESD and load dump energy. Use Value: 0.5 µA IR at 25 V prevents signal degradation during idle; 20 pF Cd avoids USB 2.0 eye diagram distortion. |
Use Scenario: ESD suppression on D+/D− lines of automotive infotainment USB ports per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance steering diode diverting ±8 kV contact discharge to VBUS or GND. Use Value: 320–360 mV VF ensures clamping occurs below USB 2.0 receiver's absolute max rating (−0.5 V to 3.6 V). |
| Low-Power Sensor Biasing | High-Speed Logic-Level Translation |
Use Scenario: Providing reverse-polarity protection and bias isolation for MEMS pressure sensors in engine manifolds. IC Role / Device Role / Timing Role: Series-blocking diode in 3.3 V supply path to prevent backfeed during multi-rail power sequencing. Use Value: 200 mA IF rating supports sensor peak current; 150 °C Tj rating matches under-hood thermal envelope. |
Use Scenario: Level-shifting between 1.8 V microcontroller GPIO and 3.3 V peripheral I²C bus. IC Role / Device Role / Timing Role: Anode-to-1.8 V, cathode-to-3.3 V rail - enabling bidirectional open-drain pull-up translation. Use Value: Sub-400 mV VF ensures <10 ns propagation delay impact; 20 pF Cd avoids I²C rise-time degradation above 400 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky barrier 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 = 1.0 µA @ 25 V (double leakage). | Marginally higher conduction loss limits use in ultra-low-power always-on nodes. | Select when cost sensitivity outweighs VF/IR optimization and AEC-Q101 requalification is not required. |
| Vishay SS12-E3/5AT | SOD-123 package (larger: 3.5 mm × 1.4 mm); VF = 450 mV @ 10 mA; VR = 20 V (half the rating). | Not suitable for 24 V automotive clamping due to lower VR and larger footprint. | Use only in non-automotive, 5–12 V consumer applications where board space is less constrained. |
Compared with NSR0230HT1G and SS12-E3/5AT, the 1PS79SB30-QF offers superior VF/IR trade-off, full AEC-Q101 compliance, and 40 V VR headroom-making it the preferred choice for space-limited, thermally demanding automotive signal protection.
Availability
1PS79SB30-QF is available at Aetrix Electronics and suitable for automotive ECU design, USB interface protection, and MEMS sensor biasing requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for 1PS79SB30-QF 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 1PS79SB30-QF belongs to Nexperia's AEC-Q101-qualified Schottky diode portfolio, engineered specifically for signal integrity, ESD resilience, and thermal performance in automotive electronics.
FAQ
Is the 1PS79SB30-QF suitable for bidirectional ESD protection?
No-it is a unidirectional Schottky diode with anode and cathode terminals. For bidirectional ESD protection, two devices must be used in series opposition or a dedicated TVS array selected. Its guard ring enhances robustness but does not enable reverse conduction.
What is the meaning of the 'QF' suffix in 1PS79SB30-QF?
The 'QF' suffix denotes Nexperia's automotive-grade variant with full AEC-Q101 qualification, extended temperature screening (−65 °C to +150 °C), and enhanced process controls-distinct from commercial-grade 'Q' versions that may lack full automotive stress testing.
Can this diode replace a standard silicon PN diode in a 24 V clamping circuit?
Yes, with critical advantages: lower VF reduces power loss and heat generation, faster switching eliminates reverse recovery noise, and guard ring improves transient immunity. However, its 40 V VR requires verification against system overvoltage margins-unlike higher-VR silicon alternatives.
Does the SOD523 package support hand soldering for prototyping?
It is technically possible but not recommended: the 0.5 mm lead pitch and 0.4 mm pad width demand precision hot-air rework tools and microscope inspection. For evaluation, use breakout boards with pre-soldered SOD523 footprints or request Aetrix's supported adapter kits.
1PS79SB30-QF 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 @ 25 V
- Capacitance @ Vr, F:
- 20pF @ 1V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
- Operating Temperature - Junction:
- 150°C
1PS79SB30-QF FAQ
1.How can I place an order for 1PS79SB30-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PS79SB30-QF 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 1PS79SB30-QF reliable?
The price and inventory of 1PS79SB30-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PS79SB30-QF is usually 5 days.
3.What payment methods are accepted for 1PS79SB30-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PS79SB30-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PS79SB30-QF?
1PS79SB30-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PS79SB30-QF 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 1PS79SB30-QF?
For technical support, including 1PS79SB30-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PS79SB30-QF requirements.
6.How does Aetrix verify that 1PS79SB30-QF is sourced from the original manufacturer or authorized distributors?
All 1PS79SB30-QF 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 1PS79SB30-QF meets industry standards.
7.What is the process for return or replacement of 1PS79SB30-QF?
All 1PS79SB30-QF units undergo pre-shipment inspection (PSI). If there is an issue with 1PS79SB30-QF, 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 1PS79SB30-QF part is unused and in its original packaging.
Return procedure for 1PS79SB30-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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