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

NXP Semiconductors PZU5.1B1,115

Name: PZU5.1B1,115
Brand: NXP Semiconductors
SKU: PZU5.1B1,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PZU5.1B1,115

Manufacturer:: NXP Semiconductors

Category:: Single Zener Diodes

Package:: -

Datasheet:: PZU5.1B1,115.pdf

Description:: DIODE ZENER 5.1V 310MW SOD323F

Quantity:: RFQ Add To RFQ list

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Inventory:230,039

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Product details

Overview

PZU5.1B1,115 from NXP Semiconductors is a precision Zener diode designed for voltage regulation and reference applications in compact SMD designs. It delivers a nominal Zener voltage of 5.1 V at 5 mA with ±2 % tolerance (B1 grade), 250 Ω maximum differential resistance, and 2 μA reverse current at 3.0 V, operating within −65 °C to +150 °C ambient range.

For engineers reviewing the PZU5.1B1,115 datasheet, PZU5.1B1,115 pinout, PZU5.1B1,115 application, or PZU5.1B1,115 equivalent, key selection criteria include Zener voltage accuracy, thermal coefficient stability, low capacitance (1.5 pF), power dissipation limits (310 mW standard footprint), and SOD323F package compatibility with high-density PCB layouts.

Technical Context

The PZU5.1B1,115 operates as a two-terminal voltage reference device using avalanche breakdown in silicon PN junction. Its temperature coefficient is +0.3 mV/K at IZ = 5 mA, indicating minimal drift over temperature - critical for stable biasing in analog circuits. The device exhibits low dynamic impedance (250 Ω max) and low junction capacitance (1.5 pF at 1 MHz, VR = 0 V), enabling use in noise-sensitive regulation and signal conditioning paths.

It is rated for non-repetitive peak reverse current up to 5.5 A under surge conditions (tp = 100 μs), and its thermal resistance from junction to ambient is 400 K/W on standard FR4 PCB - requiring careful layout for sustained power operation. The cathode-anode polarity is marked by a bar on the SOD323F package body.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	4.84 V to 5.04 V at I_Z = 5 mA - defines precise clamping/reference level for 5 V rail stabilization
Tolerance Grade	B1 (±2 %) - enables tighter regulation than standard ±5 % Zeners in feedback loops
Differential Resistance (r_dif)	≤250 Ω - ensures minimal output voltage variation under load current changes
Reverse Current (I_R)	≤2 μA at V_R = 3.0 V - guarantees low leakage in standby or battery-powered circuits
Junction Capacitance (C_d)	1.5 pF at f = 1 MHz, V_R = 0 V - supports high-frequency noise filtering without signal distortion
Power Dissipation (P_tot)	310 mW at T_amb ≤ 25 °C on standard FR4 - sets maximum continuous DC power handling
Temperature Coefficient (S_Z)	+0.3 mV/K at I_Z = 5 mA - provides near-zero drift across industrial temperature range

Pinout & Package

The PZU5.1B1,115 is housed in a SOD323F (SC-90) surface-mount plastic package measuring 2.7 mm × 1.6 mm × 0.95 mm, with flat leads optimized for reflow soldering and high-density PCB assembly.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode	Connected to regulated output node; marking bar on package identifies this terminal
2	Anode	Connected to ground or lower-potential reference point; reverse-biased during Zener operation

Key Features

Feature	Design Value
±2 % Zener voltage tolerance (B1 grade)	Enables accurate 5.1 V reference without external trimming in power supply feedback networks
SOD323F ultra-small footprint	Reduces board area by >50 % vs. SOD123; compatible with 0.5 mm pitch reflow profiles
Low 1.5 pF junction capacitance	Minimizes high-frequency loading in oscillator biasing and RF detector circuits
−65 °C to +150 °C operating range	Supports deployment in automotive engine control units and industrial motor drives
250 Ω max differential resistance	Maintains regulation stability under varying load currents in LDO pre-regulator stages

Applications

Overvoltage Protection	Reference Voltage Source
Use Scenario: Clamping transient spikes on 5 V microcontroller I/O lines exposed to ESD or inductive kickback. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator to divert excess energy to ground before IC damage occurs. Use Value: 5.1 V clamping threshold with ±2 % tolerance ensures reliable protection without false triggering below system logic high level.	Use Scenario: Providing stable reference for ADC voltage dividers or comparator thresholds in sensor interface circuits. IC Role / Device Role / Timing Role: Precision voltage reference element establishing known analog baseline independent of supply fluctuations. Use Value: +0.3 mV/K temperature coefficient and 250 Ω dynamic impedance minimize reference drift and error across −40 °C to +85 °C operating range.
Power Supply Regulation	Signal Level Shifting
Use Scenario: Stabilizing output of low-current linear regulators feeding analog front-end circuitry. IC Role / Device Role / Timing Role: Secondary Zener regulator improving ripple rejection and load regulation beyond primary LDO capability. Use Value: 310 mW power rating allows continuous operation at 62 mA @ 5 V, sufficient for biasing op-amps and transducers.	Use Scenario: Translating 3.3 V logic signals to 5 V-compatible levels in mixed-voltage digital systems. IC Role / Device Role / Timing Role: Passive level translator using forward-biased anode-cathode path for upward shifting. Use Value: Forward voltage ≤0.9 V at 10 mA enables clean 3.3 V → 5 V translation with <100 ns propagation delay and no active components.

Overvoltage Protection

Reference Voltage Source

Use Scenario: Clamping transient spikes on 5 V microcontroller I/O lines exposed to ESD or inductive kickback.

IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator to divert excess energy to ground before IC damage occurs.

Use Value: 5.1 V clamping threshold with ±2 % tolerance ensures reliable protection without false triggering below system logic high level.

Use Scenario: Providing stable reference for ADC voltage dividers or comparator thresholds in sensor interface circuits.

IC Role / Device Role / Timing Role: Precision voltage reference element establishing known analog baseline independent of supply fluctuations.

Use Value: +0.3 mV/K temperature coefficient and 250 Ω dynamic impedance minimize reference drift and error across −40 °C to +85 °C operating range.

Power Supply Regulation

Signal Level Shifting

Use Scenario: Stabilizing output of low-current linear regulators feeding analog front-end circuitry.

IC Role / Device Role / Timing Role: Secondary Zener regulator improving ripple rejection and load regulation beyond primary LDO capability.

Use Value: 310 mW power rating allows continuous operation at 62 mA @ 5 V, sufficient for biasing op-amps and transducers.

Use Scenario: Translating 3.3 V logic signals to 5 V-compatible levels in mixed-voltage digital systems.

IC Role / Device Role / Timing Role: Passive level translator using forward-biased anode-cathode path for upward shifting.

Use Value: Forward voltage ≤0.9 V at 10 mA enables clean 3.3 V → 5 V translation with <100 ns propagation delay and no active components.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-B5V1,115	Same SOD323F package, ±2 % tolerance, but higher 400 mW P_tot and 100 Ω r_dif	Better regulation stability under variable loads; slightly higher leakage (5 μA @ 3 V)	Select when lower dynamic impedance and higher power margin are required for precision references
MMSZ5231B-7-F	SOD123 package (larger), ±5 % tolerance, 500 mW P_tot, 17 Ω r_dif	Higher power handling and lower impedance, but 2× footprint area and looser voltage spec	Choose for cost-sensitive, non-precision regulation where board space is not constrained

Compared with PZU5.1B1,115, BZX384-B5V1,115 offers improved regulation fidelity at higher current, while MMSZ5231B-7-F trades voltage accuracy and size for robustness and cost - making PZU5.1B1,115 optimal for space-constrained, mid-accuracy 5 V reference needs.

Availability

PZU5.1B1,115 is available at Aetrix Electronics and suitable for voltage reference design, overvoltage protection, and signal level translation requiring stable component supply across automotive, industrial control, and consumer electronics production programs.

Supply support for PZU5.1B1,115 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The PZUxB series was developed to deliver high-precision, miniature Zener diodes for space-constrained voltage regulation and reference functions in modern SMT-based power management and signal conditioning circuits.

FAQ

What is the exact Zener voltage range for PZU5.1B1,115 at 5 mA test current?

The PZU5.1B1,115 has a guaranteed Zener voltage range of 4.84 V to 5.04 V when measured at I_Z = 5 mA and T_j = 25 °C. This ±2 % tolerance (B1 grade) is confirmed in Table 8 of the NXP datasheet and applies specifically to the PZU5.1B1 variant, not the broader PZU5.1B family.

Does PZU5.1B1,115 support reflow soldering, and what profile is recommended?

Yes, PZU5.1B1,115 is qualified for reflow soldering only - wave soldering is not recommended. NXP specifies a standard lead-free reflow profile with peak temperature ≤260 °C, consistent with JEDEC J-STD-020. The SOD323F package outline and solder pad layout are defined in Figures 5 and 6 of the datasheet.

What is the maximum reverse current specification for PZU5.1B1,115 at 3.0 V?

The PZU5.1B1,115 exhibits a maximum reverse current (I_R) of 2 μA when biased at V_R = 3.0 V and T_j = 25 °C. This value is explicitly listed in Table 8 under "Reverse current IR (μA)" for the PZU5.1B1 row and confirms low-leakage behavior essential for battery-backed circuits.

How does the temperature coefficient of PZU5.1B1,115 impact its performance in wide-temperature applications?

The PZU5.1B1,115 has a temperature coefficient of +0.3 mV/K at I_Z = 5 mA, meaning its Zener voltage increases by 0.3 mV per Kelvin rise in junction temperature. This near-zero drift enables stable 5.1 V reference operation across −65 °C to +150 °C ambient, critical for automotive and industrial environments.

Is the cathode of PZU5.1B1,115 marked on the package, and how is polarity identified?

Yes, the cathode of PZU5.1B1,115 is unambiguously marked by a visible bar on the SOD323F package body. As stated in Section 2 ("Pinning information") of the datasheet, "The marking bar indicates the cathode", and Pin 1 in the simplified outline corresponds to the cathode terminal - verified in Table 2 and Figure 5.

PZU5.1B1,115 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

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

Tolerance:: -

Power - Max:: -

Impedance (Max) (Zzt):: -

Current - Reverse Leakage @ Vr:: -

Voltage - Forward (Vf) (Max) @ If:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

PZU5.1B1,115 FAQ

1.How can I place an order for PZU5.1B1,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for PZU5.1B1,115 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 PZU5.1B1,115 reliable?

The price and inventory of PZU5.1B1,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU5.1B1,115 is usually 5 days.

3.What payment methods are accepted for PZU5.1B1,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU5.1B1,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PZU5.1B1,115?

PZU5.1B1,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PZU5.1B1,115 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 PZU5.1B1,115?

For technical support, including PZU5.1B1,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU5.1B1,115 requirements.

6.How does Aetrix verify that PZU5.1B1,115 is sourced from the original manufacturer or authorized distributors?

All PZU5.1B1,115 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 PZU5.1B1,115 meets industry standards.

7.What is the process for return or replacement of PZU5.1B1,115?

All PZU5.1B1,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU5.1B1,115, 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 PZU5.1B1,115 part is unused and in its original packaging.

Return procedure for PZU5.1B1,115:

1.Submit a request within 90 days.

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

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