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Nexperia USA Inc. 1PS79SB70-QYL
- Part No.:
- 1PS79SB70-QYL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
1PS79SB70-QYL.pdf
- Description:
- 1PS79SB70-Q/SOD523/SC-79
- Quantity:
- Payment:
- Shipping:
Inventory:4,144
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Product details
Overview
1PS79SB70-QYL from Nexperia is a general-purpose Schottky diode in SOD523 (SC-79) package, rated for 70 V reverse voltage, 70 mA forward current, and 410 mV forward voltage at 1 mA, with 2 pF capacitance and AEC-Q101 qualification for automotive use.
For engineers reviewing the 1PS79SB70-QYL datasheet, 1PS79SB70-QYL pinout, 1PS79SB70-QYL application, or 1PS79SB70-QYL equivalent, this device supports ultra-high-speed switching and voltage clamping in space-constrained automotive ECUs, power management rails, and signal line protection where low VF, low IR, and fast recovery are critical.
Technical Context
This Schottky diode leverages a planar silicon structure to achieve low forward voltage drop and minimal reverse recovery time. Its 70 V VR rating and 100 nA IR at 50 V enable reliable clamping in 12 V/24 V automotive systems under transient overvoltage conditions.
The SOD523 package delivers thermal resistance of 450 K/W (junction-to-ambient, FR4 PCB), and its 1.2 mm × 0.8 mm footprint supports high-density routing. The cathode-marked bar and anode/cathode pinning ensure unambiguous board-level orientation during automated assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR (Reverse Voltage) | 70 V - Supports clamping in 24 V automotive supply rails with margin against load-dump transients. |
| VF (Forward Voltage) | 410 mV @ 1 mA - Minimizes conduction loss in low-current bias and sensing paths. |
| IF (Forward Current) | 70 mA continuous - Suitable for signal-level rectification and logic-level clamping, not power conversion. |
| IR (Reverse Current) | 100 nA @ 50 V - Ensures negligible leakage in high-impedance voltage divider or reference circuits. |
| Cd (Capacitance) | 2 pF @ 0 V - Enables clean high-frequency signal integrity in RF detector or data-line ESD protection. |
| Tj (Max Junction Temp) | 150 °C - Compatible with under-hood automotive environments per AEC-Q101 stress testing. |
Pinout & Package
SOD523 (SC-79) surface-mount plastic package: 2-terminal, flat-lead, 1.2 mm × 0.8 mm × 0.6 mm body; marking bar denotes cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to lower-potential node; marked side of package; carries majority of reverse-biased current path. |
| 2 | Anode (A) | Connected to higher-potential node; unmarked side; source of forward conduction electrons in Schottky barrier. |
Key Features
| Feature | Design Value |
|---|---|
| High switching speed | Zero reverse recovery charge (Qrr ≈ 0) due to majority-carrier conduction - eliminates switching tail in >1 MHz clamping. |
| Low leakage current | 100 nA IR at 50 V enables stable DC biasing in precision sensor interfaces without drift. |
| AEC-Q101 qualification | Validated for automotive temperature cycling, HTRB, and ESD per JESD22-A114 - supports Tier-1 ECU deployment. |
| Ultra-small footprint | SOD523 package occupies <0.96 mm² PCB area - ideal for space-limited modules like LIN transceivers or LED drivers. |
Applications
| Automotive Body Control Module (BCM) | USB Data Line Protection |
|---|---|
Use Scenario: Clamping induced transients on LIN bus lines during battery load dump events. IC Role / Device Role / Timing Role: Passive voltage clamp placed between LIN transceiver I/O and ground. Use Value: 70 V VR and 410 mV VF prevent bus latch-up while maintaining signal rise/fall times below 10 ns. |
Use Scenario: ESD suppression on USB 2.0 D+ and D− lines in infotainment head units. IC Role / Device Role / Timing Role: Low-capacitance shunt diode connected anode-to-ground, cathode-to-signal. Use Value: 2 pF Cd preserves 480 Mbps signal integrity; 10 µA IR at 70 V avoids DC loading of pull-up resistors. |
| DC-DC Converter Feedback Path | Low-Power Sensor Bias Network |
Use Scenario: Reverse polarity protection for optocoupler feedback signals in isolated buck converters. IC Role / Device Role / Timing Role: Series-connected Schottky blocking diode in feedback resistor divider leg. Use Value: 410 mV VF introduces <1% error in 5 V reference division; 70 mA IF rating exceeds typical feedback current (<100 µA). |
Use Scenario: Biasing thermistor or RTD networks in cabin temperature sensors. IC Role / Device Role / Timing Role: Isolation diode preventing backfeed from auxiliary supply into sensor bridge. Use Value: 100 nA IR ensures <0.1% measurement error in 100 kΩ bridge arms; 150 °C Tj supports HVAC duct mounting. |
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 | 30 V VR, 200 mA IF, SOD-123 package (2.7 mm × 1.7 mm) | Larger footprint; higher IF but lower VR - unsuitable for 24 V automotive clamping. | Select only for non-automotive 3.3 V/5 V logic clamping where space allows larger package. |
| Vishay VS-1EDH02-M3/84A | 200 V VR, 200 mA IF, SOD-323 package (1.7 mm × 1.3 mm), 550 mV VF @ 1 mA | Higher VR and IF, but 35% higher VF increases conduction loss in low-voltage bias paths. | Prefer when 100+ V transient immunity is required, e.g., industrial 48 V systems; avoid in battery-sensitive designs. |
Compared with NSR0230HT1G and VS-1EDH02-M3/84A, the 1PS79SB70-QYL uniquely balances 70 V VR, ultra-low 410 mV VF, and SOD523 size for automotive signal clamping - offering optimal trade-off between transient margin, power efficiency, and PCB area in compact ECUs.
Availability
1PS79SB70-QYL is available at Aetrix Electronics and suitable for automotive body control modules, USB interface protection, DC-DC feedback isolation, and low-power sensor bias networks requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1PS79SB70-QYL 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 1PS79SB70-QYL belongs to Nexperia's AEC-Q101-qualified Schottky diode portfolio, engineered specifically for signal-level protection and clamping in automotive electronics where miniaturization, low VF, and robustness are mandatory.
FAQ
Is the 1PS79SB70-QYL suitable for 48 V automotive systems?
No. Its 70 V reverse voltage rating provides margin for 12 V and 24 V systems (including ISO 7637-2 pulse 5a/b load dump), but lacks sufficient headroom for sustained 48 V nominal operation or associated transients. For 48 V architectures, consider diodes rated ≥100 V VR.
What is the maximum allowable soldering temperature profile for the SOD523 package?
The datasheet specifies reflow soldering as the only recommended method, with peak temperature ≤260 °C for ≤30 seconds. Hand soldering is not advised due to thermal mass constraints and risk of die damage; use preheated hot-air stations calibrated to IPC-J-STD-020 profiles.
Does the cathode marking bar indicate polarity during circuit simulation?
Yes. The bar corresponds to the cathode terminal (Pin 1), which must be oriented toward the more negative potential in forward-bias operation. In SPICE models and layout, this defines the direction of forward conduction and reverse blocking behavior per standard diode convention.
Can the 1PS79SB70-QYL replace a standard silicon diode in a 5 V logic clamping circuit?
Yes - with measurable improvement. Its 410 mV VF versus ~700 mV for a 1N4148 reduces clamping threshold by 290 mV, enabling faster response to overvoltage events and lower power dissipation. However, verify that 2 pF capacitance does not degrade signal edge rates in >100 MHz applications.
1PS79SB70-QYL 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):
- 70 V
- Current - Average Rectified (Io):
- 70mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 15 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 70 V
- Capacitance @ Vr, F:
- 2pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
- Operating Temperature - Junction:
- 150°C
1PS79SB70-QYL FAQ
1.How can I place an order for 1PS79SB70-QYL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PS79SB70-QYL 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 1PS79SB70-QYL reliable?
The price and inventory of 1PS79SB70-QYL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PS79SB70-QYL is usually 5 days.
3.What payment methods are accepted for 1PS79SB70-QYL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PS79SB70-QYL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PS79SB70-QYL?
1PS79SB70-QYL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PS79SB70-QYL 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 1PS79SB70-QYL?
For technical support, including 1PS79SB70-QYL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PS79SB70-QYL requirements.
6.How does Aetrix verify that 1PS79SB70-QYL is sourced from the original manufacturer or authorized distributors?
All 1PS79SB70-QYL 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 1PS79SB70-QYL meets industry standards.
7.What is the process for return or replacement of 1PS79SB70-QYL?
All 1PS79SB70-QYL units undergo pre-shipment inspection (PSI). If there is an issue with 1PS79SB70-QYL, 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 1PS79SB70-QYL part is unused and in its original packaging.
Return procedure for 1PS79SB70-QYL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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