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Nexperia USA Inc. 1PS79SB30-QX
- Part No.:
- 1PS79SB30-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
1PS79SB30-QX.pdf
- Description:
- 1PS79SB30-Q/SOD523/SC-79
- Quantity:
- Payment:
- Shipping:
Inventory:9,113
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Product details
Overview
1PS79SB30-QX 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 qualified to AEC-Q101 for automotive use in ultra-high-speed switching and voltage clamping circuits.
For engineers reviewing the 1PS79SB30-QX datasheet, 1PS79SB30-QX pinout, 1PS79SB30-QX application, or 1PS79SB30-QX equivalent, key selection criteria include low VF (≤360 mV @10 mA), ultra-low IR (≤0.5 µA @25 V), SOD523 package footprint (1.2 × 0.8 × 0.6 mm), AEC-Q101 qualification, and junction temperature rating up to 150 °C.
Technical Context
This discrete Schottky diode employs a planar silicon structure with an integrated guard ring to enhance robustness against electrical overstress and improve reliability under transient conditions. Its low-barrier metal-semiconductor junction delivers fast recovery (trr not specified but inherent to Schottky architecture) and minimal stored charge.
The device operates within −65 °C to +150 °C ambient and junction temperature ranges, with thermal resistance Rth(j-a) of 450 K/W on FR4 PCB - a critical parameter for thermal management in space-constrained automotive modules and portable electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 40 V - Maximum DC blocking capability without breakdown; defines safe operating range in clamping and reverse-polarity protection. |
| Forward Current (IF) | 200 mA continuous - Sustained conduction capacity; supports compact power rail steering in low-power automotive sensors. |
| Forward Voltage (VF) | 320–360 mV @10 mA - Enables high-efficiency rectification with minimal conduction loss in battery-sensitive applications. |
| Reverse Current (IR) | ≤0.5 µA @25 V - Ensures negligible leakage in standby mode, critical for low-quiescent-current systems. |
| Diode Capacitance (Cd) | 20 pF @1 V - Low junction capacitance supports >100 MHz switching performance in RF bias and high-speed signal routing. |
| Junction Temperature (Tj) | 150 °C max - Allows operation in under-hood automotive environments without derating at full current. |
Pinout & Package
Encapsulated in the SOD523 (SC-79) ultra-small surface-mount plastic package (1.2 mm × 0.8 mm × 0.6 mm), this two-terminal diode uses a standardized footprint compatible with automated reflow assembly. The cathode is marked by a visible bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Negative terminal; connected to ground or lower-potential node in clamping and reverse-blocking configurations. |
| 2 (A) | Anode | Positive terminal; interfaces with supply rails or signal sources requiring unidirectional current flow. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring protection | Enhances ESD and surge immunity per AEC-Q101, reducing field failure risk in automotive transients. |
| Ultra-low forward voltage | VF ≤360 mV @10 mA enables >95% efficiency in 3.3 V/5 V rail clamping with minimal self-heating. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTGB, HTRB, and temperature cycling per JESD22-A108. |
| SOD523 package size | 1.2 × 0.8 mm footprint saves >60% board area vs. SOD323, enabling dense layout in ADAS camera modules. |
Applications
| Automotive Sensor Protection | USB Port Reverse Polarity Guard |
|---|---|
Use Scenario: Protecting LIN bus transceivers and ambient light sensors from reverse battery connection and load dump spikes. IC Role / Device Role: Bidirectional clamping diode placed across VCC and GND to shunt overvoltage transients. Use Value: 40 V VR and 150 °C Tj ensure uninterrupted operation in engine control units exposed to under-hood thermal stress. |
Use Scenario: Preventing damage to USB 2.0 PHY ICs during incorrect cable insertion or docking station misalignment. IC Role / Device Role: Series blocking diode in VBUS path to enforce unidirectional power flow. Use Value: 320–360 mV VF limits voltage drop to <1% of 5 V rail, preserving USB compliance margin for downstream devices. |
| Low-Power IoT Node Clamping | RF Bias Network Isolation |
Use Scenario: Voltage clamping in BLE/Wi-Fi SoC power domains where quiescent current must remain below 1 µA. IC Role / Device Role: Transient voltage suppressor at LDO input to absorb ESD events per IEC 61000-4-2 Level 4. Use Value: ≤0.5 µA IR at 25 V ensures no measurable impact on battery life in 10-year coin-cell-powered nodes. |
Use Scenario: DC bias isolation in 2.4 GHz Wi-Fi front-end modules between PA output and antenna switch. IC Role / Device Role: RF choke bypass diode maintaining DC continuity while minimizing capacitive loading. Use Value: 20 pF Cd at 1 V avoids resonance shift in matching networks, preserving PA efficiency above 90%. |
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; 30 V VR, 200 mA IF, VF = 370 mV @10 mA - higher forward drop. | Limited to ≤30 V systems; unsuitable for 36 V automotive loads or 40 V clamp designs. | Select when cost sensitivity outweighs 50 mV VF penalty and 40 V rating is not required. |
| Vishay VS-2EDH01HM3/H | SOD-323 package; 40 V VR, 200 mA IF, VF = 350 mV @10 mA - 30% larger footprint (1.7 × 1.3 mm). | Compatible in function but requires PCB redesign; higher Rth(j-a) (500 K/W) reduces thermal headroom. | Choose only if legacy SOD-323 footprint compatibility is mandatory and space constraints allow. |
Compared with NSR0230HT1G and VS-2EDH01HM3/H, the 1PS79SB30-QX uniquely combines 40 V rating, sub-360 mV VF, AEC-Q101 qualification, and minimal 1.2 × 0.8 mm footprint - making it optimal for next-generation automotive and space-limited IoT power management.
Availability
1PS79SB30-QX is available at Aetrix Electronics and suitable for automotive sensor protection, USB port reverse polarity guarding, low-power IoT node clamping, and RF bias network isolation requiring stable component supply and AEC-Q101-compliant sourcing.
Supply support for 1PS79SB30-QX 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 energy-efficient solutions.
The 1PS79SB30-QX belongs to Nexperia's AEC-Q101-qualified Schottky diode product line, engineered specifically for ultra-compact, low-loss protection in automotive electronics and portable systems where thermal and space constraints dominate design.
FAQ
Is the 1PS79SB30-QX RoHS and REACH compliant?
Yes, the 1PS79SB30-QX meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006 requirements. Nexperia confirms compliance via material declarations and third-party testing; full documentation is available upon request through Aetrix Electronics' technical support portal.
What is the maximum allowable soldering temperature profile for the SOD523 package?
The 1PS79SB30-QX supports standard lead-free reflow per JEDEC J-STD-020, with peak temperature of 260 °C for ≤30 seconds. Preheat ramp rate must not exceed 3 °C/s, and time above 217 °C must be limited to 60–150 seconds to prevent delamination or marking degradation.
Does the guard ring provide protection against ISO 7637-2 pulse 5a/b transients?
The integrated guard ring improves robustness against localized ESD and fast transients, but the 1PS79SB30-QX is not rated for direct ISO 7637-2 pulse 5a/b suppression. It is intended for secondary clamping behind TVS diodes or in conjunction with RC snubbers in automotive subsystems.
Can the 1PS79SB30-QX replace a 1N5711 in a high-frequency detector circuit?
No - while both are Schottky diodes, the 1N5711 has higher VR (70 V) and different Cd (0.7 pF), optimized for RF detection. The 1PS79SB30-QX's 20 pF Cd and 40 V rating make it unsuitable for >100 MHz detector applications; use only in clamping, blocking, or low-MHz switching roles.
1PS79SB30-QX 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-QX FAQ
1.How can I place an order for 1PS79SB30-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PS79SB30-QX 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-QX reliable?
The price and inventory of 1PS79SB30-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PS79SB30-QX is usually 5 days.
3.What payment methods are accepted for 1PS79SB30-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PS79SB30-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PS79SB30-QX?
1PS79SB30-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PS79SB30-QX 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-QX?
For technical support, including 1PS79SB30-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PS79SB30-QX requirements.
6.How does Aetrix verify that 1PS79SB30-QX is sourced from the original manufacturer or authorized distributors?
All 1PS79SB30-QX 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-QX meets industry standards.
7.What is the process for return or replacement of 1PS79SB30-QX?
All 1PS79SB30-QX units undergo pre-shipment inspection (PSI). If there is an issue with 1PS79SB30-QX, 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-QX part is unused and in its original packaging.
Return procedure for 1PS79SB30-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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