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Nexperia USA Inc. PZU3.3B2A,115
- Part No.:
- PZU3.3B2A,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PZU3.3B2A,115.pdf
- Description:
- DIODE ZENER 3.3V 320MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,440
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Product details
Overview
PZU3.3B2A,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 3.3 V nominal working voltage at 5 mA, with 95 Ω max differential resistance, 5 µA max reverse current at 0.5 mA test condition, and −2.4 mV/K temperature coefficient. It delivers stable reference voltage in low-power analog monitoring and power rail clamping circuits.
For engineers reviewing the PZU3.3B2A,115 datasheet, PZU3.3B2A,115 pinout, PZU3.3B2A,115 application, or PZU3.3B2A,115 equivalent, this device serves as a precision voltage reference in space-constrained SMT designs where tight tolerance, low leakage, and hard breakdown knee are required - especially in 3.3 V LDO feedback paths and microcontroller reset supervision.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain a stable 3.3 V reference across its cathode-anode terminals under controlled current conditions (IZ = 5 mA). Its −2.4 mV/K temperature coefficient ensures minimal drift over ambient range (−55 °C to +150 °C), and its 95 Ω max differential resistance guarantees low dynamic impedance near nominal regulation current.
The device features a hard breakdown knee and very low leakage (≤5 µA at VR = 0.5 × VZ), enabling clean voltage clamping without significant thermal runaway risk. Its SOD323 footprint supports high-density PCB layouts while maintaining adequate thermal resistance (255 K/W junction-to-solder-point).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 3.3 V at IZ = 5 mA - defines precise regulation point for 3.3 V system references |
| Tolerance | ±2 % (B2 series) - enables tighter voltage margin control vs. ±5 % variants in critical feedback loops |
| Differential Resistance (rdif) | ≤95 Ω at IZ = 5 mA - ensures minimal output voltage shift under load transients |
| Reverse Current (IR) | ≤5 µA at VR = 0.5 × VZ (1.65 V) - guarantees low standby power loss in always-on monitoring circuits |
| Temperature Coefficient (SZ) | −2.4 mV/K - provides predictable, negative drift behavior for compensation-aware designs |
| Total Power Dissipation (Ptot) | 320 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous DC power handling in standard layout |
| Non-repetitive Peak Power (PZSM) | 40 W at tp = 100 µs - supports transient overvoltage suppression without failure |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package; 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, cathode marked by bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output node; marking bar identifies this terminal for correct orientation during placement |
| 2 | Anode | Connected to ground or current-limiting resistor; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Hard breakdown knee | Enables sharp, predictable turn-on at 3.3 V without soft saturation - critical for accurate threshold detection |
| Very low leakage current | ≤5 µA at 1.65 V reverse bias - minimizes error current in high-impedance feedback networks |
| ±2 % voltage tolerance (B2) | Reduces calibration burden in precision 3.3 V reference applications versus ±5 % alternatives |
| SOD323 ultra-small footprint | 1.7 mm × 1.25 mm area - supports miniaturized power management and sensor interface PCBs |
| Optimized thermal resistance | Rth(j-sp) = 255 K/W - allows reliable operation up to 150 °C junction temperature with standard solder pad |
Applications
| 3.3 V LDO Feedback Reference | Microcontroller Reset Supervision |
|---|---|
Use Scenario: Providing stable voltage reference to the feedback divider of a 3.3 V low-dropout regulator. IC Role / Device Role / Timing Role: Zener diode acts as precision shunt reference, setting output voltage via resistor ratio. Use Value: ±2 % tolerance and low rdif ensure output accuracy remains within ±1.5 % over line/load/temperature without trimming. |
Use Scenario: Monitoring 3.3 V supply rail to assert reset signal when voltage drops below safe operating level. IC Role / Device Role / Timing Role: Functions as threshold detector in conjunction with comparator or discrete transistor circuit. Use Value: Hard breakdown knee and low IR enable fast, repeatable trip point detection with minimal hysteresis. |
| Low-Power Sensor Biasing | ESD-Clamped Analog Input Protection |
Use Scenario: Supplying stable bias voltage to analog sensors (e.g., thermistors, RTDs) in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Provides low-drift, low-current reference for excitation or offset compensation. Use Value: −2.4 mV/K SZ and 5 µA IR allow sensor bridge outputs to remain stable over −40 °C to +85 °C ambient. |
Use Scenario: Placed across analog input pins to clamp ESD transients while preserving signal integrity. IC Role / Device Role / Timing Role: Shunt limiter that activates only above 3.3 V, protecting downstream ADC inputs. Use Value: 40 W non-repetitive surge rating absorbs IEC 61000-4-2 Level 4 pulses without degradation. |
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-B3V3,115 | Same SOD323 package, ±2 % tolerance, but higher rdif (≤120 Ω) and higher IR (≤10 µA at 0.5×VZ) | Less suitable for high-precision feedback where low dynamic impedance is critical | Prefer PZU3.3B2A,115 when <100 Ω rdif and sub-5 µA IR are required at 3.3 V |
| MMSZ4685T1G | SOD123 package (larger), ±5 % tolerance, 3.3 V nominal, rdif ≤ 100 Ω, IR ≤ 10 µA at 1 V | Requires more board area; looser tolerance increases need for post-calibration | Choose PZU3.3B2A,115 for space-constrained designs needing tighter initial accuracy and lower leakage |
Compared with BZX384-B3V3,115 and MMSZ4685T1G, PZU3.3B2A,115 offers superior regulation stability due to lower differential resistance and reverse current, making it optimal for high-accuracy 3.3 V reference paths in compact industrial and portable electronics.
Availability
PZU3.3B2A,115 is available at Aetrix Electronics and suitable for 3.3 V power supervision, analog sensor biasing, LDO feedback referencing, and ESD-clamped input protection requiring stable component supply and consistent parametric performance across production lots.
Supply support for PZU3.3B2A,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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
PZU3.3B2A,115 belongs to the PZUxBA series of general-purpose Zener regulators designed specifically for precision voltage reference and clamping in space-constrained surface-mount applications demanding tight tolerance and low leakage.
FAQ
What is the maximum continuous reverse current this Zener can handle?
The absolute maximum forward current is 200 mA, but for Zener operation, the recommended continuous reverse current is limited by power dissipation: at 25 °C ambient on FR4 PCB, 320 mW / 3.3 V ≈ 97 mA maximum steady-state Zener current. Exceeding this risks thermal runaway due to negative temperature coefficient below 5 V.
Does this part have automotive qualification?
No. PZU3.3B2A,115 is not automotive-qualified per AEC-Q200. It is specified for industrial and commercial applications only, with operating ambient temperature range of −55 °C to +150 °C but no stress testing or failure rate data aligned to automotive reliability standards.
How does the B2 tolerance code translate to actual voltage range?
B2 denotes approximately ±2 % tolerance. For PZU3.3B2A,115, this means guaranteed Zener voltage between 3.234 V and 3.366 V at IZ = 5 mA and Tj = 25 °C, verified per Nexperia's production test limits in Table 8 of the datasheet Rev. 4.
Can this Zener be used in parallel for higher power handling?
No. Parallel connection of Zener diodes is not recommended due to mismatched breakdown voltages causing current hogging. For higher power, use a single higher-rated device or add an external series pass transistor - never parallel PZU3.3B2A,115 units.
PZU3.3B2A,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±2%
- Power - Max:
- 320 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 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
PZU3.3B2A,115 FAQ
1.How can I place an order for PZU3.3B2A,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU3.3B2A,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 PZU3.3B2A,115 reliable?
The price and inventory of PZU3.3B2A,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU3.3B2A,115 is usually 5 days.
3.What payment methods are accepted for PZU3.3B2A,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU3.3B2A,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU3.3B2A,115?
PZU3.3B2A,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU3.3B2A,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 PZU3.3B2A,115?
For technical support, including PZU3.3B2A,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU3.3B2A,115 requirements.
6.How does Aetrix verify that PZU3.3B2A,115 is sourced from the original manufacturer or authorized distributors?
All PZU3.3B2A,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 PZU3.3B2A,115 meets industry standards.
7.What is the process for return or replacement of PZU3.3B2A,115?
All PZU3.3B2A,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU3.3B2A,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 PZU3.3B2A,115 part is unused and in its original packaging.
Return procedure for PZU3.3B2A,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU3.3B2A,115 Tags
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