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Nexperia USA Inc. PZU20B3A,115
- Part No.:
- PZU20B3A,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PZU20B3A,115.pdf
- Description:
- DIODE ZENER 20V 320MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,584
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Product details
Overview
PZU20B3A,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 20 V nominal Zener voltage at 5 mA, with 100 Ω maximum differential resistance, 20 nA reverse current at 0.5 mA, and 1.5 mV/K temperature coefficient. It delivers stable reference voltage in low-power analog circuits, power supply feedback loops, and overvoltage protection clamping.
For engineers reviewing the PZU20B3A,115 datasheet, PZU20B3A,115 pinout, PZU20B3A,115 application, or PZU20B3A,115 equivalent, this device supports precision voltage regulation where tight tolerance, low leakage, and predictable thermal drift are required in space-constrained SMT designs.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable 20 V reference across its terminals under controlled current conditions. Its ±2 % tolerance (B3 series), 100 Ω dynamic impedance at IZ = 5 mA, and 1.5 mV/K temperature coefficient enable accurate regulation in feedback networks and voltage references.
Designed for surface-mount use in FR4 PCBs with standard SOD323 footprint, it supports non-repetitive surge handling up to 40 W (100 µs square wave) and continuous dissipation of 320 mW at Tamb ≤ 25 °C - critical for transient suppression and steady-state biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 20 V nominal at IZ = 5 mA; tight ±2 % tolerance ensures predictable reference accuracy in feedback paths. |
| Differential Resistance rdif | ≤100 Ω at IZ = 5 mA; low impedance maintains regulation stability against load or supply variations. |
| Reverse Current IR | ≤20 nA at VR = 0.5 × VZ; ultra-low leakage preserves battery life and minimizes error in high-impedance bias networks. |
| Temperature Coefficient SZ | +1.5 mV/K at IZ = 5 mA; positive drift enables predictable compensation in temperature-sensitive references. |
| Total Power Dissipation Ptot | 320 mW at Tamb ≤ 25 °C on FR4 PCB; defines safe DC operating envelope for continuous regulation. |
| Non-repetitive Peak Power PZSM | 40 W for 100 µs square wave; enables robust transient clamping without device failure. |
| Junction Temperature Tj | 150 °C maximum; sets upper thermal limit for reliability in enclosed or high-ambient environments. |
Pinout & Package
SOD323 (SC-76) plastic surface-mount package: 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output node; polarity must be observed for correct reverse-bias operation. |
| 2 | Anode | Connected to ground or lower-potential rail; completes reverse-bias path for Zener conduction. |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance (B3 series) | Enables tighter regulation than ±5 % variants, reducing calibration overhead in precision references. |
| Low 20 nA reverse current at 0.5 mA | Minimizes loading error in high-impedance divider networks and extends battery runtime in portable systems. |
| Hard breakdown knee & low dynamic impedance | Ensures sharp, repeatable turn-on behavior ideal for voltage clamping and reference stability. |
| SOD323 ultra-small footprint | Supports high-density PCB layouts in wearables, IoT sensors, and compact power modules. |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Used in the feedback divider of a 24 V DC-DC converter to set output voltage via optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Provides precise 20 V reference point that determines regulation threshold and loop gain stability. Use Value: ±2 % tolerance eliminates need for post-production trimming; low rdif prevents output drift under varying load currents. |
Use Scenario: Placed across a 12 V automotive subsystem rail to clamp transients exceeding 24 V during load dump events. IC Role / Device Role / Timing Role: Acts as passive shunt limiter, conducting only when input exceeds 20 V + margin, diverting surge energy to ground. Use Value: 40 W non-repetitive surge rating absorbs short-duration spikes without degradation; SOD323 size fits tight board areas near connectors. |
| Low-Power Sensor Biasing | ADC Reference Stabilization |
Use Scenario: Supplies stable bias to a thermistor-based temperature sensor in a battery-powered environmental monitor. IC Role / Device Role / Timing Role: Delivers low-noise, low-drift reference voltage for Wheatstone bridge excitation and signal conditioning. Use Value: 20 nA leakage avoids measurable error in microamp-level bias currents; +1.5 mV/K coefficient allows predictable software compensation. |
Use Scenario: References a 12-bit SAR ADC in an industrial data acquisition module requiring <0.5 % full-scale accuracy. IC Role / Device Role / Timing Role: Replaces higher-cost bandgap reference where moderate drift and cost sensitivity dominate. Use Value: 100 Ω rdif limits output impedance-induced code errors; SOD323 placement near ADC VREF pin minimizes noise pickup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B20,115 | Same 20 V, ±2 %, SOD323, but higher rdif (150 Ω max) and higher IR (50 nA at 0.5 mA). | Less suitable for high-precision feedback; acceptable for general-purpose clamping where leakage is non-critical. | Select if cost priority outweighs regulation accuracy and leakage requirements. |
| MMSZ5248B-7-F | 20 V, ±5 %, SOD123 package (larger), rdif = 23 Ω, IR = 100 nA at 10 V. | Lower impedance benefits fast transient response but ±5 % tolerance requires external trimming; SOD123 footprint incompatible. | Choose only when board redesign accommodates larger package and system allows wider voltage tolerance. |
Compared with BZX384-B20,115, PZU20B3A,115 offers superior regulation accuracy and lower leakage for precision biasing; versus MMSZ5248B-7-F, it trades slightly higher impedance for tighter tolerance and smaller footprint - optimal for miniaturized, battery-sensitive designs.
Availability
PZU20B3A,115 is available at Aetrix Electronics and suitable for power supply feedback references, overvoltage clamping, and low-power sensor biasing requiring stable component supply across production lifecycles.
Supply support for PZU20B3A,115 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 logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The PZUxBA series targets general-purpose Zener regulation in space-constrained SMT applications, emphasizing tight tolerance, low leakage, and robust surge capability for cost-sensitive yet performance-aware designs.
FAQ
What is the maximum continuous reverse current for PZU20B3A,115 at 25 °C ambient?
The device is rated for total power dissipation of 320 mW at Tamb ≤ 25 °C on FR4 PCB. At 20 V Zener voltage, this corresponds to a maximum continuous reverse current of 16 mA (320 mW ÷ 20 V). Exceeding this risks thermal runaway due to junction temperature rise beyond 150 °C.
Can PZU20B3A,115 replace a 20 V Zener with ±5 % tolerance in an existing design?
Yes - it can directly substitute in the same SOD323 footprint, provided the circuit tolerates tighter regulation and lower leakage. The improved ±2 % tolerance may eliminate need for downstream calibration, but verify loop stability margins since lower rdif (100 Ω vs typical 200+ Ω) alters dynamic response.
How does the +1.5 mV/K temperature coefficient affect long-term voltage accuracy?
Over a 100 °C junction temperature range (25–125 °C), the coefficient causes ~150 mV drift (1.5 mV/K × 100 K), or ±0.75 % of 20 V. This is predictable and compensatable in firmware or hardware; it is significantly lower than coefficients of lower-voltage Zeners (<10 V) which exhibit negative drift up to –2.5 mV/K.
Is PZU20B3A,115 suitable for automotive applications?
No - this part is not AEC-Q200 qualified. Nexperia explicitly states non-automotive qualification in its legal disclaimers. For automotive use, select AEC-Q200-compliant Zeners such as PZU20B3A-Q, which undergo extended temperature cycling, humidity testing, and vibration validation per automotive standards.
PZU20B3A,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±2%
- Power - Max:
- 320 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
PZU20B3A,115 FAQ
1.How can I place an order for PZU20B3A,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU20B3A,115 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 PZU20B3A,115 reliable?
The price and inventory of PZU20B3A,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU20B3A,115 is usually 5 days.
3.What payment methods are accepted for PZU20B3A,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU20B3A,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU20B3A,115?
PZU20B3A,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU20B3A,115 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 PZU20B3A,115?
For technical support, including PZU20B3A,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU20B3A,115 requirements.
6.How does Aetrix verify that PZU20B3A,115 is sourced from the original manufacturer or authorized distributors?
All PZU20B3A,115 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 PZU20B3A,115 meets industry standards.
7.What is the process for return or replacement of PZU20B3A,115?
All PZU20B3A,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU20B3A,115, 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 PZU20B3A,115 part is unused and in its original packaging.
Return procedure for PZU20B3A,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU20B3A,115 Tags
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