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Nexperia USA Inc. 1PS76SB21-QX
- Part No.:
- 1PS76SB21-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
1PS76SB21-QX.pdf
- Description:
- 1PS76SB21-Q/SOD323/SOD2
- Quantity:
- Payment:
- Shipping:
Inventory:8,824
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Product details
Overview
1PS76SB21-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 550 mV forward voltage at 200 mA, 40–50 pF capacitance at 0 V, and AEC-Q101 qualification for automotive use. It serves as a low-loss, ultra-fast switching element in power rail clamping and reverse polarity protection circuits.
For engineers reviewing the 1PS76SB21-QX datasheet, 1PS76SB21-QX pinout, 1PS76SB21-QX application, or 1PS76SB21-QX equivalent, key selection criteria include its SOD323 package footprint, low VF at high IF, thermal resistance of 450 K/W, AEC-Q101 qualification status, and cathode-marked anode-cathode polarity configuration.
Technical Context
This Schottky diode employs a planar silicon structure with an integrated guard ring to enhance ruggedness against electrical overstress and transient voltage spikes. Its low forward voltage drop and sub-50 pF junction capacitance enable efficient high-speed switching in DC-DC converter output stages and I/O line protection.
The device operates across –65 °C to 150 °C ambient temperature and supports pulsed forward currents up to 1 A (8.3 ms half-sine), while maintaining stable reverse leakage (<15 µA at 30 V, 25 °C) and junction temperature limits up to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 40 V - Maximum continuous blocking voltage before breakdown; defines safe operating range in clamping and reverse protection applications. |
| Forward Current (IF) | 200 mA - Continuous DC current rating; determines usable current headroom in low-power supply rails and signal line protection. |
| Forward Voltage (VF) | 550 mV @ 200 mA - Low conduction loss enables minimal power dissipation and higher efficiency in compact power paths. |
| Junction Capacitance (Cd) | 40–50 pF @ 0 V, 1 MHz - Enables fast switching with minimal signal distortion in high-frequency line termination and ESD clamp networks. |
| Thermal Resistance (Rth(j-a)) | 450 K/W - Specifies junction-to-ambient heat dissipation on standard FR4 PCB; informs derating requirements above 85 °C ambient. |
| AEC-Q101 Qualified | Yes - Validated per Automotive Electronics Council stress test standard; supports deployment in engine control, body electronics, and ADAS subsystems. |
Pinout & Package
Encapsulated in the ultra-compact SOD323 (SC-76) surface-mount plastic package (1.7 mm × 1.25 mm × 0.95 mm), this diode uses a two-terminal configuration with cathode identified by a marking bar on the package body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Negative terminal; connects to lower-potential node in forward bias; marking bar aligns with this pin for visual polarity identification. |
| 2 | Anode (A) | Positive terminal; connects to higher-potential node during conduction; forms the primary current entry path in forward operation. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 550 mV at 200 mA ensures <110 mW conduction loss, reducing thermal load in space-constrained automotive modules. |
| Integrated guard ring | Enhances ESD and transient surge immunity without external components, improving reliability in noisy vehicle environments. |
| Low junction capacitance | 40–50 pF enables <1 ns switching transition times, supporting >100 MHz line termination and high-speed data bus protection. |
| AEC-Q101 qualification | Validated for automotive-grade temperature cycling, humidity, and mechanical shock-no additional qualification needed for Tier-1 designs. |
Applications
| Ultra-High-Speed Switching | Voltage Clamping |
|---|---|
|
Use Scenario: Fast-switching DC-DC converter synchronous rectification and flyback snubber networks. IC Role / Device Role / Timing Role: Low-VF freewheeling diode replacing MOSFET body diodes to reduce conduction loss and improve efficiency. Use Value: 550 mV VF minimizes power loss at 200 mA, enabling >92% efficiency in 3.3 V/5 V point-of-load converters. |
Use Scenario: Overvoltage suppression on microcontroller I/O pins and sensor supply lines. IC Role / Device Role / Timing Role: Clamp diode shunting transients to VCC or GND when input exceeds rail limits. Use Value: 40 pF capacitance avoids signal integrity degradation on 10–50 MHz digital lines while clamping within 10 ns. |
| Line Termination | Reverse Polarity Protection |
|
Use Scenario: RS-485/RS-232 bus termination and ESD protection at connector interfaces. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp limiting differential voltage swing and absorbing ESD events. Use Value: Sub-50 pF Cd preserves signal edge rate and eye diagram integrity on 25 Mbps serial links. |
Use Scenario: Input protection for battery-powered infotainment modules and telematics units. IC Role / Device Role / Timing Role: Series-connected anode-to-input diode blocking reverse current during incorrect battery installation. Use Value: 200 mA continuous rating supports 5 V/100 mA auxiliary rails; 40 V VR accommodates 12 V automotive transients. |
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 | 30 V VR, 200 mA IF, VF = 370 mV @ 100 mA, SOD-523 package (smaller, 1.2 × 0.8 mm) | Limited to 30 V systems; unsuitable for 40 V automotive transients; better for portable electronics with tighter board space. | Select when VR margin <10 V suffices and footprint reduction is critical; verify transient immunity separately. |
| SS12 | 20 V VR, 1 A IF, VF = 500 mV @ 1 A, SMA package (larger, 4.5 × 2.7 mm) | Higher current capability but larger size and lower VR; not AEC-Q101 qualified. | Choose only for non-automotive 12 V industrial supplies where thermal mass outweighs space constraints. |
Compared with RB520S-30T1G and SS12, the 1PS76SB21-QX uniquely balances 40 V robustness, AEC-Q101 compliance, and SOD323 miniaturization-making it the sole option for space-limited automotive 12 V rail protection requiring full transient coverage.
Availability
1PS76SB21-QX is available at Aetrix Electronics and suitable for automotive body control modules, infotainment power sequencing, and ADAS sensor interface protection requiring stable component supply and long-term lifecycle assurance.
Supply support for 1PS76SB21-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 advanced packaging.
The 1PS76SB21-QX belongs to Nexperia's AEC-Q101-qualified Schottky diode portfolio, engineered specifically for robust, low-loss protection in automotive power and signal domains under harsh environmental conditions.
FAQ
Is the 1PS76SB21-QX suitable for 24 V commercial vehicle applications?
Yes. With a 40 V reverse voltage rating and AEC-Q101 qualification, it withstands ISO 7637-2 pulse 1 (–150 V/50 ms) and pulse 3b (–100 V/100 ns) when used with appropriate series impedance. Its 150 °C max junction temperature supports under-hood deployment in trucks and buses.
What is the meaning of the 'S1' marking on the device body?
The 'S1' marking is the manufacturer's code for the 1PS76SB21-QX type, per Nexperia's marking table. The cathode is indicated by a bar adjacent to pin 1, confirming polarity orientation during automated optical inspection and manual placement.
Can this diode replace a standard PN junction diode in reverse polarity protection?
Yes-its 550 mV forward voltage at 200 mA reduces power loss by ~60% versus a typical 1N400x (VF ≈ 1.1 V), lowering heat generation and enabling smaller heatsinking. However, its higher reverse leakage (up to 3 mA at 100 °C) must be verified against system standby current budgets.
Does the SOD323 package support reflow soldering per JEDEC J-STD-020?
Yes. Nexperia specifies compatibility with standard Pb-free reflow profiles (peak 260 °C, 20–40 s above 217 °C). Figure 5 in the datasheet provides the recommended solder land pattern (0.5 mm pad width, 1.35 mm center-to-center pitch) for reliable joint formation and tombstoning prevention.
1PS76SB21-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- 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:
- 550 mV @ 200 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 15 µA @ 30 V
- Capacitance @ Vr, F:
- 40pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
- Operating Temperature - Junction:
- 150°C
1PS76SB21-QX FAQ
1.How can I place an order for 1PS76SB21-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PS76SB21-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 1PS76SB21-QX reliable?
The price and inventory of 1PS76SB21-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PS76SB21-QX is usually 5 days.
3.What payment methods are accepted for 1PS76SB21-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PS76SB21-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PS76SB21-QX?
1PS76SB21-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PS76SB21-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 1PS76SB21-QX?
For technical support, including 1PS76SB21-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PS76SB21-QX requirements.
6.How does Aetrix verify that 1PS76SB21-QX is sourced from the original manufacturer or authorized distributors?
All 1PS76SB21-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 1PS76SB21-QX meets industry standards.
7.What is the process for return or replacement of 1PS76SB21-QX?
All 1PS76SB21-QX units undergo pre-shipment inspection (PSI). If there is an issue with 1PS76SB21-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 1PS76SB21-QX part is unused and in its original packaging.
Return procedure for 1PS76SB21-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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