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Nexperia USA Inc. 1PS79SB30,135
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- Part No.:
- 1PS79SB30,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
1PS79SB30,135.pdf
- Description:
- DIODE SCHOTTKY 40V 200MA SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:52,025
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Product details
Overview
1PS79SB30,135 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 ultra-low forward voltage (320–360 mV at 10 mA) and low reverse leakage (≤0.5 µA at 25 V), deployed in ultra-compact SOD523 (SC-79) package for space-constrained DC-DC converter output rectification.
For engineers reviewing the 1PS79SB30,135 datasheet, 1PS79SB30,135 pinout, 1PS79SB30,135 application, or 1PS79SB30,135 equivalent, key selection criteria include forward voltage at low currents (250–290 mV @ 1 mA), junction-to-ambient thermal resistance (450 K/W), diode capacitance (20 pF @ 1 V), reverse voltage rating (40 V), and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This Schottky diode employs a planar silicon structure with an integrated guard ring to suppress edge breakdown and improve surge robustness under repetitive transient stress. Its low barrier height enables sub-360 mV forward drop at 10 mA while maintaining <0.5 µA reverse leakage at 25 V - critical for high-efficiency, low-power signal path clamping.
The device operates across –65 °C to +150 °C ambient temperature range and is qualified per AEC-Q101 for automotive applications. Thermal resistance of 450 K/W (junction-to-ambient, FR4 PCB, single-sided copper) defines its power dissipation limit in unforced-air environments.
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 and flyback snubbing. |
| Forward Current (IF) | 200 mA continuous - supports low-power logic-level signal routing and auxiliary supply rectification without derating at ≤85 °C. |
| Forward Voltage (VF) | 320–360 mV @ 10 mA, 25 °C - enables >95% efficiency in 3.3 V LDO bypass paths and ultra-low-loss level-shifting circuits. |
| Reverse Leakage (IR) | ≤0.5 µA @ 25 V, pulsed - ensures minimal standby current drain in battery-backed real-time clock backup paths. |
| Diode Capacitance (Cd) | 20 pF @ 1 V, 1 MHz - preserves signal integrity in <100 MHz digital I/O clamping and ESD protection front-end stages. |
| Junction Temp (Tj) | 150 °C max - allows operation in under-hood automotive modules and sealed industrial enclosures without active cooling. |
| Thermal Resistance (Rth(j-a)) | 450 K/W - defines 111 mW max power dissipation on standard FR4 PCB; limits usable IF to ~150 mA at 85 °C ambient. |
Pinout & Package
Encapsulated in SOD523 (SC-79) ultra-small surface-mount plastic package: 1.2 mm × 0.8 mm × 0.6 mm body, flat lead profile optimized for automated placement and reflow soldering on dense PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Negative terminal; marked by bar on top surface; connects to lower-potential node in forward conduction path. |
| 2 | Anode (A) | Positive terminal; unmarked side; ties to higher-potential source in clamping or rectification configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring integration | Suppresses edge-related avalanche failure during voltage transients, enabling reliable operation in noisy automotive CAN/LIN bus interfaces. |
| Ultra-low VF at 1 mA | 250–290 mV - minimizes voltage offset in precision analog signal clamping (e.g., ADC input protection) without loading source impedance. |
| AEC-Q101 qualification | Qualified for automotive discrete semiconductor stress testing - supports use in infotainment power rails and ADAS sensor bias networks. |
| SOD523 footprint | 1.2 mm × 0.8 mm land pattern - reduces board area by >60% vs. SOD323, enabling dual-diode placement in USB-C CC line protection layouts. |
Applications
| USB Power Delivery Clamping | Automotive Sensor Biasing |
|---|---|
Use Scenario: Protecting CC and VCONN lines in USB-C receptacles against ±15 kV ESD and 100 V inductive spikes during hot-plug events. IC Role / Device Role / Timing Role: Low-capacitance (<20 pF), fast-turn-on Schottky clamp placed between signal line and ground or rail. Use Value: Prevents latch-up in USB PD controllers by limiting voltage excursion to <3.6 V while adding <0.5 ns propagation delay. |
Use Scenario: Providing isolated bias current to Hall-effect position sensors in EPS motor assemblies exposed to 125 °C under-hood temperatures. IC Role / Device Role / Timing Role: Reverse-polarity protection diode in 5 V sensor supply path, placed upstream of LDO regulator. Use Value: Blocks reverse current during battery disconnect while sustaining 200 mA load with <360 mV dropout at full temperature range. |
| Low-Power MCU Reset Line Protection | IoT Node Battery Backup Path |
Use Scenario: Isolating reset signal from external debug interface to prevent spurious resets during firmware updates on ARM Cortex-M0+ microcontrollers. IC Role / Device Role / Timing Role: Signal-level blocking diode between SWDIO and nRESET, leveraging low IR to avoid leakage-induced timeout. Use Value: Ensures reset assertion remains valid for ≥20 ms after debug port deactivation, with <0.5 µA leakage preserving timing margin. |
Use Scenario: Enabling seamless switchover between main Li-ion cell and coin-cell backup in smart meter RTC circuits during brownout conditions. IC Role / Device Role / Timing Role: OR-ing diode in dual-supply path, selected for lowest possible VF to minimize voltage loss on backup rail. Use Value: Delivers 100 µA backup current with only 250 mV drop at 25 °C, extending coin-cell life by >18 months versus standard silicon diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RB521S-30T1G | Higher VF (370 mV typ @ 10 mA); same 40 V VR; SOD-523 package; no AEC-Q101 qualification. | Lacks automotive qualification; suitable for consumer IoT but not under-hood deployment. | Select when cost sensitivity outweighs AEC-Q101 requirement and VF margin >50 mV is acceptable. |
| NSR0230HT1G | Lower IF rating (300 mA); identical VF (320 mV @ 10 mA); SOD-523; AEC-Q101 qualified. | Higher current headroom enables shared use in dual-rail 3.3 V/5 V systems with single BOM item. | Prefer when future design scaling requires >200 mA capability or multi-rail consolidation is planned. |
Compared with 1PS79SB30,135, RB521S-30T1G trades automotive reliability for marginal cost reduction, while NSR0230HT1G extends current capacity without sacrificing VF or qualification - making it ideal for scalable platform designs where thermal margin and compliance must coexist.
Availability
1PS79SB30,135 is available at Aetrix Electronics and suitable for USB-C interface protection, automotive sensor biasing, low-power MCU reset isolation, and IoT node battery backup paths requiring stable component supply and long-term lifecycle assurance.
Supply support for 1PS79SB30,135 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 advanced packaging and automotive-qualified components.
The 1PS79SB30,135 belongs to Nexperia's AEC-Q101-qualified Schottky diode portfolio, engineered specifically for space-constrained, low-power signal integrity and power path protection in automotive and portable electronics.
FAQ
Is 1PS79SB30,135 suitable for automotive applications?
Yes - it is fully qualified per AEC-Q101 for stress testing of discrete semiconductors, including temperature cycling, humidity bias, and HTRB. Its 150 °C max junction temperature and guard ring structure support under-hood deployment in body control modules and sensor interfaces.
What is the marking code for 1PS79SB30,135?
The device is marked with "G1" on the top surface of the SOD523 package. The cathode is indicated by a visible bar adjacent to pin 1, consistent with SC-79 orientation standards used in automated optical inspection systems.
How does thermal performance change on 2-layer vs. 4-layer PCBs?
Rth(j-a) drops from 450 K/W (FR4, single-sided copper) to ~320 K/W on 2-layer boards with 1 oz copper and thermal vias, and further to ~260 K/W on 4-layer boards with internal ground/power planes - directly increasing allowable continuous IF by up to 40%.
Can 1PS79SB30,135 replace 1N5817 in existing designs?
No - 1N5817 is a through-hole DO-41 Schottky rated at 1 A/20 V with VF ≈ 450 mV. 1PS79SB30,135 offers superior VF at low currents but lower VR and IF; it replaces only in SMD-limited, low-voltage, low-current roles like signal clamping - not power rectification.
1PS79SB30,135 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
- Operating Temperature - Junction:
- 150°C (Max)
1PS79SB30,135 FAQ
1.How can I place an order for 1PS79SB30,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PS79SB30,135 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 1PS79SB30,135 reliable?
The price and inventory of 1PS79SB30,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PS79SB30,135 is usually 5 days.
3.What payment methods are accepted for 1PS79SB30,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PS79SB30,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PS79SB30,135?
1PS79SB30,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PS79SB30,135 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 1PS79SB30,135?
For technical support, including 1PS79SB30,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PS79SB30,135 requirements.
6.How does Aetrix verify that 1PS79SB30,135 is sourced from the original manufacturer or authorized distributors?
All 1PS79SB30,135 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 1PS79SB30,135 meets industry standards.
7.What is the process for return or replacement of 1PS79SB30,135?
All 1PS79SB30,135 units undergo pre-shipment inspection (PSI). If there is an issue with 1PS79SB30,135, 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 1PS79SB30,135 part is unused and in its original packaging.
Return procedure for 1PS79SB30,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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