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Nexperia USA Inc. 1PS76SB21/ZLX
- Part No.:
- 1PS76SB21/ZLX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
1PS76SB21/ZLX.pdf
- Description:
- DIODE SCHOTTKY 40V 200MA SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,128
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Product details
Overview
1PS76SB21/ZLX 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 and 40 pF typical capacitance at 0 V, used in ultra high-speed switching and reverse polarity protection circuits.
For engineers reviewing the 1PS76SB21/ZLX datasheet, 1PS76SB21/ZLX pinout, 1PS76SB21/ZLX application, or 1PS76SB21/ZLX equivalent, key selection criteria include low VF (550 mV @ 200 mA), low Cd (40 pF), SOD323 package footprint, reverse voltage rating (40 V), and thermal resistance (450 K/W).
Technical Context
This Schottky diode employs a planar structure with an integrated guard ring to enhance robustness against electrical overstress and improve reliability under transient conditions. Its low forward voltage drop and low junction capacitance are optimized for high-frequency signal integrity and fast switching transitions.
The device operates within a junction temperature range of −65 °C to 125 °C and exhibits thermally limited performance in free-air convection due to its 450 K/W junction-to-ambient thermal resistance. Reverse leakage remains below 15 µA at 30 V and 25 °C, supporting stable clamping and termination functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 40 V - Maximum DC blocking capability without breakdown; defines safe operating margin in clamping and reverse protection. |
| Forward Current (IF) | 200 mA - Continuous DC current handling capacity; supports moderate-power signal path and bias applications. |
| Forward Voltage (VF) | 550 mV @ 200 mA - Low conduction loss enabling efficient power routing and minimal voltage droop in compact designs. |
| Junction Capacitance (Cd) | 40 pF @ 0 V, 1 MHz - Enables clean high-speed edge response in line termination and RF-coupled signal paths. |
| Reverse Leakage (IR) | 15 µA @ 30 V, 25 °C - Ensures low standby power loss and stable reference behavior in precision analog interfaces. |
| Thermal Resistance (Rth(j-a)) | 450 K/W - Limits power dissipation to ~110 mW in free air; requires PCB copper area for higher continuous loads. |
Pinout & Package
Encapsulated in the SOD323 (SC-76) surface-mount plastic package measuring 1.7 mm × 1.25 mm × 0.95 mm with 1.3 mm lead pitch, the device uses a two-terminal configuration where the cathode is marked by a bar on the package body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Negative terminal; connected to ground or lower-potential node in reverse polarity protection and clamping configurations. |
| 2 | Anode (A) | Positive terminal; receives input voltage or signal source; forms forward-biased path during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated guard ring | Improves ESD and surge immunity without external components; enables reliable operation in noisy industrial environments. |
| Low forward voltage | 550 mV at full rated current reduces conduction loss and self-heating in space-constrained layouts. |
| Very small SMD package | SOD323 footprint saves board area in portable and high-density consumer electronics. |
| Low junction capacitance | 40 pF enables sub-nanosecond switching and preserves signal integrity in USB, I²C, and GPIO protection paths. |
Applications
| Ultra High-Speed Switching | Voltage Clamping |
|---|---|
Use Scenario: Fast-switching logic-level translation between 3.3 V and 5 V domains in microcontroller I/O expansion. IC Role / Device Role / Timing Role: Signal-path steering diode enabling bidirectional level shifting with minimal propagation delay. Use Value: 40 pF capacitance and 550 mV VF ensure <1 ns rise/fall time preservation and <50 mV offset error across temperature. |
Use Scenario: Protecting ADC input pins from overvoltage transients induced by ESD or inductive coupling. IC Role / Device Role / Timing Role: Clamp diode shunting excess voltage to rail before internal protection structures activate. Use Value: Guard ring design sustains >8 kV HBM ESD without parametric shift; 15 µA IR avoids loading precision references. |
| Line Termination | Reverse Polarity Protection |
Use Scenario: Matching characteristic impedance in high-speed digital bus stubs (e.g., I²C pull-up networks). IC Role / Device Role / Timing Role: Low-capacitance termination element minimizing reflections while maintaining DC bias. Use Value: 40 pF Cd ensures <0.5% impedance deviation up to 100 MHz; 40 V VR accommodates 3.3 V/5 V bus swings with margin. |
Use Scenario: Preventing damage to Li-ion battery-powered modules when external DC adapter is inserted backward. IC Role / Device Role / Timing Role: Series anode-cathode path blocking reverse current flow while permitting forward conduction. Use Value: 550 mV VF adds only 0.55 V dropout at 200 mA, preserving >90% of 3.7 V nominal battery voltage under load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RB520S-40T1G | Higher IF (300 mA), same VR (40 V), VF = 450 mV @ 100 mA, SOD-523 package (smaller footprint, 1.2 mm × 0.8 mm). | Better suited for higher-current bias rails; tighter layout constraints due to smaller pad spacing. | Select when board area is critical and forward current exceeds 200 mA intermittently. |
| BAT54C,215 | Dual common-cathode configuration, VR = 30 V, VF = 320 mV @ 10 mA, SOT-23 package (larger, 2.9 mm × 1.3 mm). | Supports dual-channel protection or clamping; lower VR limits use in 3.3 V systems only. | Choose for multi-rail protection where shared cathode simplifies routing and VR margin is sufficient. |
Compared with RB520S-40T1G and BAT54C,215, the 1PS76SB21/ZLX offers balanced trade-offs: mid-range current rating, verified guard ring robustness, and SOD323's proven manufacturability-making it optimal for single-channel, 40 V–capable, space-sensitive industrial and portable designs.
Availability
1PS76SB21/ZLX is available at Aetrix Electronics and suitable for ultra high-speed switching, voltage clamping, and reverse polarity protection requiring stable component supply in high-mix production environments.
Supply support for 1PS76SB21/ZLX 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, headquartered in Nijmegen, Netherlands, serving automotive, industrial, and consumer markets.
This part belongs to Nexperia's Schottky diode portfolio designed for signal integrity, power efficiency, and robustness in compact, high-frequency electronic systems.
FAQ
Is the 1PS76SB21/ZLX automotive qualified?
No. The 1PS76SB21/ZLX is not automotive qualified per AEC-Q101. It is specified for industrial and consumer applications. Nexperia offers automotive-grade alternatives such as the 1PS76SB21-Q series, which undergo extended temperature testing and qualification per automotive standards.
What does the marking 'S1' indicate on the device body?
The marking 'S1' is the manufacturer's top-side code for the 1PS76SB21/ZLX, per Table 4 of the datasheet. The bar adjacent to pin 1 identifies the cathode terminal, consistent with standard SOD323 polarity conventions.
Can this diode be used in a 5 V USB data line protection circuit?
Yes. With 40 pF capacitance and 15 µA reverse leakage at 30 V, the 1PS76SB21/ZLX meets USB 2.0 signal integrity requirements for D+/D− line clamping. Its 40 V VR provides ample margin above 5.25 V VBUS, and the guard ring enhances ESD resilience beyond IEC 61000-4-2 Level 4.
How does thermal resistance affect maximum power dissipation?
With Rth(j-a) = 450 K/W in free air, the maximum continuous power dissipation is ~110 mW (calculated as (125 °C − 25 °C)/450 K/W). Exceeding this causes junction temperature to exceed 125 °C. Adding 25 mm² of 1 oz copper on the PCB reduces Rth(j-a) significantly, enabling higher sustained current.
1PS76SB21/ZLX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 50pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
- Operating Temperature - Junction:
- 125°C (Max)
1PS76SB21/ZLX FAQ
1.How can I place an order for 1PS76SB21/ZLX through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PS76SB21/ZLX 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/ZLX reliable?
The price and inventory of 1PS76SB21/ZLX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PS76SB21/ZLX is usually 5 days.
3.What payment methods are accepted for 1PS76SB21/ZLX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PS76SB21/ZLX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PS76SB21/ZLX?
1PS76SB21/ZLX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PS76SB21/ZLX 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/ZLX?
For technical support, including 1PS76SB21/ZLX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PS76SB21/ZLX requirements.
6.How does Aetrix verify that 1PS76SB21/ZLX is sourced from the original manufacturer or authorized distributors?
All 1PS76SB21/ZLX 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/ZLX meets industry standards.
7.What is the process for return or replacement of 1PS76SB21/ZLX?
All 1PS76SB21/ZLX units undergo pre-shipment inspection (PSI). If there is an issue with 1PS76SB21/ZLX, 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/ZLX part is unused and in its original packaging.
Return procedure for 1PS76SB21/ZLX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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