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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

NXP Semiconductors PZU3.0B1,115

Name: PZU3.0B1,115
Brand: NXP Semiconductors
SKU: PZU3.0B1,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PZU3.0B1,115

Manufacturer:: NXP Semiconductors

Category:: Single Zener Diodes

Package:: SC-90, SOD-323F

Datasheet:: PZU3.0B1,115.pdf

Description:: DIODE ZENER 3V 310MW SOD323F

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Product details

Overview

PZU3.0B1,115 from Nexperia is a general-purpose Zener voltage regulator diode in a SOD323F (SC-90) surface-mount package, rated for 3.0 V nominal Zener voltage at 5 mA, ±2 % tolerance, 550 mW total power dissipation, and AEC-Q101 qualification for automotive use.

For engineers reviewing the PZU3.0B1,115 datasheet, PZU3.0B1,115 pinout, PZU3.0B1,115 application, or PZU3.0B1,115 equivalent, this device serves as a precision low-voltage reference and overvoltage clamp in space-constrained, high-reliability power management circuits where tight voltage regulation and low leakage are critical.

Technical Context

The PZU3.0B1,115 operates as a two-terminal shunt regulator with hard breakdown knee and low dynamic impedance (≤1000 Ω at I_Z = 0.5 mA), optimized for stable reference generation in low-current bias networks. Its thermal resistance from junction to solder point is 55 K/W, enabling reliable operation up to 150 °C junction temperature.

Designed for surface-mounted applications on FR4 PCBs with standard tin-plated copper pads, it delivers ≤10 μA reverse current at V_R = 1 V and exhibits a negative temperature coefficient of –2.1 mV/K at I_Z = 5 mA - consistent with low-voltage Zener behavior below 5 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	3.0 V nominal at I_Z = 5 mA; tight ±2 % tolerance ensures predictable clamping in reference and protection circuits
Total Power Dissipation (P_tot)	550 mW at T_amb ≤ 25 °C on FR4 PCB; defines maximum continuous DC power handling before thermal derating
Differential Resistance (r_dif)	≤1000 Ω at I_Z = 0.5 mA; low impedance maintains regulation stability under light-load variations
Reverse Current (I_R)	≤10 μA at V_R = 1 V; enables low-power standby operation without excessive quiescent loss
Temperature Coefficient (S_Z)	–2.1 mV/K at I_Z = 5 mA; predictable negative drift supports temperature-compensated designs
Junction Temperature (T_j)	150 °C maximum; supports operation in under-hood automotive and industrial environments
AEC-Q101 Qualified	Validated per Automotive Electronics Council stress test standard for discrete semiconductors

Pinout & Package

SOD323F (SC-90) plastic surface-mount package: 2-pin, ultra-small outline (2.7 × 1.6 mm footprint), flat lead, cathode marked by bar on top surface.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode	Connected to regulated output node; polarity marker determines correct orientation during PCB placement
2	Anode	Connected to ground or lower-potential rail; completes shunt path for Zener conduction

Key Features

Feature	Design Value
±2 % Zener voltage tolerance (B1 grade)	Enables tighter regulation margins than standard ±5 % (B grade), reducing need for post-production trimming
Hard breakdown knee	Ensures sharp, repeatable turn-on behavior ideal for precision voltage limiting and reference buffering
Very low leakage current	≤10 μA at 1 V reverse bias minimizes standby power loss in battery-powered and always-on systems
AEC-Q101 qualification	Confirms reliability for automotive power supply monitoring, ECU voltage supervision, and infotainment subsystems
SOD323F ultra-compact package	0.65 mm profile and 2.7 × 1.6 mm footprint supports high-density layout in portable and automotive ECUs

Applications

Automotive Voltage Supervision	Low-Power Reference Buffer
Use Scenario: Monitoring 3.3 V microcontroller supply rails in engine control units to detect brown-out conditions. IC Role / Device Role / Timing Role: Shunt regulator providing stable 3.0 V reference to comparator input for precise undervoltage detection. Use Value: ±2 % tolerance and AEC-Q101 qualification ensure robust fault detection across –40 °C to +125 °C ambient range.	Use Scenario: Biasing op-amp input stages in sensor signal conditioning circuits powered from 3.3 V LDOs. IC Role / Device Role / Timing Role: Low-leakage Zener reference establishing fixed DC offset for analog front-end amplification. Use Value: ≤10 μA reverse current at 1 V prevents loading of sensitive bias networks in nanoamp-level sensor interfaces.
USB Port Overvoltage Clamp	Industrial PLC Input Protection
Use Scenario: Protecting USB 2.0 data line receivers from transient overvoltage events exceeding 3.6 V. IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting surge current away from downstream transceivers. Use Value: Hard breakdown knee and 550 mW power rating enable reliable clamping of short-duration ESD pulses without degradation.	Use Scenario: Safeguarding 24 V digital input modules against accidental 3.3 V/5 V backfeed from field devices. IC Role / Device Role / Timing Role: Standby-mode Zener limiter holding input node at safe 3.0 V when higher voltages are applied. Use Value: 150 °C junction rating and SOD323F thermal resistance (55 K/W) sustain protection function during extended industrial thermal cycling.

Automotive Voltage Supervision

Low-Power Reference Buffer

Use Scenario: Monitoring 3.3 V microcontroller supply rails in engine control units to detect brown-out conditions.

IC Role / Device Role / Timing Role: Shunt regulator providing stable 3.0 V reference to comparator input for precise undervoltage detection.

Use Value: ±2 % tolerance and AEC-Q101 qualification ensure robust fault detection across –40 °C to +125 °C ambient range.

Use Scenario: Biasing op-amp input stages in sensor signal conditioning circuits powered from 3.3 V LDOs.

IC Role / Device Role / Timing Role: Low-leakage Zener reference establishing fixed DC offset for analog front-end amplification.

Use Value: ≤10 μA reverse current at 1 V prevents loading of sensitive bias networks in nanoamp-level sensor interfaces.

USB Port Overvoltage Clamp

Industrial PLC Input Protection

Use Scenario: Protecting USB 2.0 data line receivers from transient overvoltage events exceeding 3.6 V.

IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting surge current away from downstream transceivers.

Use Value: Hard breakdown knee and 550 mW power rating enable reliable clamping of short-duration ESD pulses without degradation.

Use Scenario: Safeguarding 24 V digital input modules against accidental 3.3 V/5 V backfeed from field devices.

IC Role / Device Role / Timing Role: Standby-mode Zener limiter holding input node at safe 3.0 V when higher voltages are applied.

Use Value: 150 °C junction rating and SOD323F thermal resistance (55 K/W) sustain protection function during extended industrial thermal cycling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-B3V0,115	Same 3.0 V ±2 % rating and SOD323 package, but rated for 300 mW P_tot and not AEC-Q101 qualified	Limited to commercial-grade consumer and industrial applications without automotive temperature or reliability requirements	Select when cost sensitivity outweighs automotive qualification and higher power headroom
MMSZ4684T1G	3.0 V ±5 % tolerance, SOD123 package (larger footprint), 500 mW P_tot, no AEC-Q101 certification	Suitable for non-automotive power rail monitoring where ±5 % regulation margin is acceptable	Choose only if board space allows SOD123 and AEC-Q101 compliance is unnecessary

Compared with BZX384-B3V0,115 and MMSZ4684T1G, the PZU3.0B1,115 uniquely combines automotive qualification, ±2 % tolerance, and 550 mW power handling in the smallest SOD323F footprint - making it the sole option for space-constrained, high-reliability 3.0 V reference and clamp functions in automotive ECUs and industrial controllers.

Availability

PZU3.0B1,115 is available at Aetrix Electronics and suitable for automotive voltage supervision, low-power reference buffering, USB port overvoltage clamping, and industrial PLC input protection requiring stable component supply and long-term lifecycle support.

Supply support for PZU3.0B1,115 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 essential components including logic, discretes, MOSFETs, and bipolar transistors.

The PZUxB series belongs to Nexperia's AEC-Q101-qualified Zener regulator portfolio, engineered specifically for precision voltage reference and overvoltage protection in automotive and industrial power management systems.

FAQ

What is the Zener voltage tolerance of PZU3.0B1,115 and how is it indicated in the marking?

The PZU3.0B1,115 has a Zener voltage tolerance of ±2 %, designated by the "B1" suffix in its type number. Per Table 4 of the datasheet, this variant is marked with "F4" on the device body - a unique code distinguishing it from the ±5 % "B" grade (marked "G5") and other tighter-tolerance variants like B2 and B3.

Is PZU3.0B1,115 suitable for automotive applications and what qualification does it hold?

Yes, PZU3.0B1,115 is qualified to AEC-Q101 for discrete semiconductors, as confirmed in Section 11 ("Test information") of the datasheet. This qualification validates its reliability under automotive stress conditions including temperature cycling, humidity, and mechanical shock - making it appropriate for use in engine control units, body electronics, and ADAS subsystems.

What is the maximum reverse current specification for PZU3.0B1,115 at 1 V reverse voltage?

At V_R = 1 V and T_j = 25 °C, the PZU3.0B1,115 exhibits a maximum reverse current (I_R) of 10 μA, as specified in Table 8 under "Reverse current IR (μA)" for the PZU3.0B2 row - which applies identically to the B1 variant per the family-wide characterization methodology.

Does PZU3.0B1,115 have a specified forward voltage, and what is its value at 10 mA?

Yes, the PZU3.0B1,115 has a forward voltage (V_F) of ≤0.9 V at I_F = 10 mA, per Table 1 ("Quick reference data"). This parameter is relevant for ESD protection configurations where the diode may conduct forward during transient events, and confirms compatibility with standard CMOS logic-level drive requirements.

What is the thermal resistance from junction to solder point (R_th(j-sp)) for PZU3.0B1,115 and why does it matter?

The thermal resistance from junction to solder point is 55 K/W, as listed in Table 6. This low value reflects efficient heat transfer from the die through the cathode tab to the PCB copper, directly enabling sustained 550 mW operation at elevated ambient temperatures - critical for under-hood automotive deployments where airflow is limited and board-level thermal management dominates.

PZU3.0B1,115 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

Package/Case:: SC-90, SOD-323F

Packaging:: Bulk

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 3 V

Tolerance:: ±2%

Power - Max:: 310 mW

Impedance (Max) (Zzt):: 95 Ohms

Current - Reverse Leakage @ Vr:: 10 µA @ 1 V

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 100 mA

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-323F

PZU3.0B1,115 FAQ

1.How can I place an order for PZU3.0B1,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for PZU3.0B1,115 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 PZU3.0B1,115 reliable?

The price and inventory of PZU3.0B1,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU3.0B1,115 is usually 5 days.

3.What payment methods are accepted for PZU3.0B1,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU3.0B1,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PZU3.0B1,115?

PZU3.0B1,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PZU3.0B1,115 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 PZU3.0B1,115?

For technical support, including PZU3.0B1,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU3.0B1,115 requirements.

6.How does Aetrix verify that PZU3.0B1,115 is sourced from the original manufacturer or authorized distributors?

All PZU3.0B1,115 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 PZU3.0B1,115 meets industry standards.

7.What is the process for return or replacement of PZU3.0B1,115?

All PZU3.0B1,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU3.0B1,115, 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 PZU3.0B1,115 part is unused and in its original packaging.

Return procedure for PZU3.0B1,115:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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