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Nexperia USA Inc. 1PS79SB31,135
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- Part No.:
- 1PS79SB31,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
1PS79SB31,135.pdf
- Description:
- DIODE SCHOTTKY 30V 200MA SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:8,754
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Product details
Overview
1PS79SB31 from Nexperia is a planar Schottky barrier diode in SOD523 (SC-79) package, rated for 30 V reverse voltage and 200 mA forward current, with typical forward voltage of 255–300 mV at 10 mA. It serves as a low-loss, ultra-fast switching element in portable power rails and signal path protection circuits.
For engineers reviewing the 1PS79SB31 datasheet, 1PS79SB31 pinout, 1PS79SB31 application, or 1PS79SB31 equivalent, key selection criteria include its sub-300 mV VF at 10 mA, 20–25 pF capacitance at 1 V, guard ring protection, thermal resistance of 450 K/W, and suitability for low-power handheld device designs.
Technical Context
This Schottky diode uses a planar silicon junction with guard ring structure to suppress edge breakdown and ensure stable reverse leakage under transient stress. Its ultra-small SOD523 footprint enables high-density placement in space-constrained PCB layouts without compromising thermal derating.
The device operates across –65 °C to +125 °C ambient, with junction temperature limited to 125 °C. Reverse current remains ≤30 µA at 10 V and 25 °C, while diode capacitance is tightly specified at 20–25 pF at 1 V/1 MHz - critical for RF and high-speed digital clamping applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 30 V maximum - defines maximum blocking capability in clamp or flyback paths |
| Forward Current (IF) | 200 mA continuous - supports low-current rectification in battery-powered sensors and logic I/O rails |
| Forward Voltage (VF) | 255–300 mV at IF = 10 mA - enables <0.3 V conduction loss in 1.8 V/3.3 V systems |
| Diode Capacitance (Cd) | 20–25 pF at VR = 1 V, f = 1 MHz - ensures minimal signal distortion in high-speed data line protection |
| Thermal Resistance (Rth(j-a)) | 450 K/W - requires careful PCB copper area planning for sustained 200 mA operation in free air |
| Reverse Current (IR) | ≤30 µA at VR = 10 V - guarantees low standby leakage in always-on power domains |
Pinout & Package
SOD523 (SC-79) plastic surface-mount package: 1.2 mm × 0.8 mm × 0.6 mm body, single-sided FR4 mounting, tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Marked side with bar; connects to lower-potential node in forward bias; carries return current in clamping |
| 2 | Anode (A) | Unmarked terminal; connects to higher-potential node; source of forward conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low forward voltage | 255–300 mV @ 10 mA - reduces power loss by >50% vs. standard silicon diodes in 3.3 V rail clamping |
| Guard ring protection | Integrated edge termination - prevents premature avalanche at junction periphery under voltage transients |
| Ultra-small SMD package | SOD523 footprint (1.2 × 0.8 mm) - enables placement adjacent to BGA or QFN ICs without routing congestion |
| Low diode capacitance | 20–25 pF @ 1 V - preserves signal integrity on USB 2.0, I²C, and GPIO lines up to 100 MHz |
Applications
| USB Data Line Protection | Low-Voltage Logic Clamp |
|---|---|
Use Scenario: ESD protection and overvoltage clamping on USB D+/D− lines in portable chargers and OTG adapters. IC Role / Device Role / Timing Role: Bidirectional shunt clamp that conducts only during transient overvoltage events above ~3.6 V. Use Value: 25 pF capacitance avoids signal rise-time degradation; 30 µA IR ensures no DC loading on 1.5 kΩ pull-up resistors. |
Use Scenario: Level-shifting and rail-to-rail clamping between 1.8 V and 3.3 V logic domains in wearables and IoT sensor nodes. IC Role / Device Role / Timing Role: Passive bidirectional clamp limiting voltage excursion to VF + VREF, enabling safe interface coupling. Use Value: Sub-300 mV VF allows clamping threshold below 2.1 V, preserving noise margin in 1.8 V CMOS inputs. |
| Portable Device Battery Charging Path | RF Front-End Bias Decoupling |
Use Scenario: Reverse polarity and backfeed protection in single-cell Li-ion charging circuits for Bluetooth headsets and smart pens. IC Role / Device Role / Timing Role: Low-loss series blocking diode in charging path, conducting only during valid input conditions. Use Value: 200 mA rating and 255 mV VF minimize voltage drop and heat generation in compact 500 mW charging modules. |
Use Scenario: DC bias feed and RF choke bypass in 2.4 GHz Wi-Fi/BLE antenna matching networks. IC Role / Device Role / Timing Role: Low-capacitance DC path isolator that minimizes RF insertion loss at ISM band frequencies. Use Value: 22 pF typical capacitance yields <0.3 dB insertion loss at 2.45 GHz when used with 1 nH inductance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RB520S-30T1G | Higher VF (320–420 mV @ 10 mA); same SOD-523 package; 30 V VR | Less suitable for sub-3.0 V rail clamping due to higher conduction loss | Prefer when cost sensitivity outweighs VF performance in non-battery-critical designs |
| NSR0230HT1G | Lower VR (30 V same), but larger SOD-923 package (1.0 × 0.6 mm); VF = 270–370 mV @ 10 mA | Not pin-compatible; requires PCB redesign; slightly higher capacitance (30 pF) | Select only if board rework is acceptable and tighter footprint is required beyond SOD523 limits |
Compared with RB520S-30T1G and NSR0230HT1G, the 1PS79SB31 delivers the lowest verified VF in SOD523, best-in-class Cd uniformity, and guaranteed guard ring protection - making it optimal for space- and efficiency-constrained 1.8–3.3 V portable systems where leakage and signal integrity are co-critical.
Availability
1PS79SB31 is available at Aetrix Electronics and suitable for USB protection, low-voltage logic clamping, and portable battery charging circuits requiring stable component supply and consistent parametric performance across production lots.
Supply support for 1PS79SB31 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 and industrial-grade components.
The 1PS79SB31 belongs to Nexperia's Schottky diode portfolio engineered specifically for ultra-low-power, space-constrained consumer electronics - emphasizing minimal VF, tight Cd control, and robust transient immunity in sub-2 mm² packages.
FAQ
What is the maximum allowable junction temperature for continuous operation?
The absolute maximum junction temperature is 125 °C. For reliable long-term operation at 200 mA, ambient temperature must be limited to ≤85 °C when mounted on standard FR4 with single-sided 1 oz copper, based on the specified Rth(j-a) of 450 K/W and thermal derating curves in the datasheet.
Is the 1PS79SB31 suitable for automotive applications?
No. The 1PS79SB31 is not AEC-Q200 qualified and lacks automotive-grade screening, temperature cycling validation, or extended lifetime testing. Nexperia explicitly states non-automotive qualification in its legal disclaimers, and the device is intended for consumer and industrial portable equipment only.
How does the guard ring structure improve reliability?
The integrated guard ring redistributes electric field intensity away from the junction periphery, suppressing edge-initiated avalanche and preventing localized hot-spot formation during repetitive 10 V reverse transients. This extends operational life under repeated ESD or inductive switching stress, as confirmed in Nexperia's qualification reports for similar SOD523 Schottky devices.
What is the recommended reflow soldering profile?
Nexperia specifies JEDEC J-STD-020-compliant reflow for SOD523: peak temperature 260 °C max, time above 217 °C ≤60 s, ramp-up rate ≤3 °C/s. Figure 5 in the datasheet provides the exact solder land pattern (0.5 mm pad width, 0.6 mm length, 0.4 mm spacing), and thermal relief must avoid excessive copper pour under the package body.
1PS79SB31,135 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):
- 30 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 200 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 30 µA @ 10 V
- Capacitance @ Vr, F:
- 25pF @ 1V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
- Operating Temperature - Junction:
- 125°C (Max)
1PS79SB31,135 FAQ
1.How can I place an order for 1PS79SB31,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PS79SB31,135 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 1PS79SB31,135 reliable?
The price and inventory of 1PS79SB31,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PS79SB31,135 is usually 5 days.
3.What payment methods are accepted for 1PS79SB31,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PS79SB31,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PS79SB31,135?
1PS79SB31,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PS79SB31,135 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 1PS79SB31,135?
For technical support, including 1PS79SB31,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PS79SB31,135 requirements.
6.How does Aetrix verify that 1PS79SB31,135 is sourced from the original manufacturer or authorized distributors?
All 1PS79SB31,135 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 1PS79SB31,135 meets industry standards.
7.What is the process for return or replacement of 1PS79SB31,135?
All 1PS79SB31,135 units undergo pre-shipment inspection (PSI). If there is an issue with 1PS79SB31,135, 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 1PS79SB31,135 part is unused and in its original packaging.
Return procedure for 1PS79SB31,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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