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

Nexperia USA Inc. PZU84-B5V1R

Name: PZU84-B5V1R
Brand: Nexperia USA Inc.
SKU: PZU84-B5V1R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PZU84-B5V1R

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: PZU84-B5V1R.pdf

Description:: DIODE ZENER 5.1V 250MW TO236AB

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Product details

Overview

PZU84-B5V1R from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, providing precise 5.1 V regulation at I_Z = 5 mA with 250 Ω typical differential resistance and 1.5 μA max reverse leakage at V_R = 1 V, used for low-power voltage reference and overvoltage protection in power supply feedback loops.

For engineers reviewing the PZU84-B5V1R datasheet, PZU84-B5V1R pinout, PZU84-B5V1R application, or PZU84-B5V1R equivalent, this page delivers verified Zener parameters including V_Z, r_dif, I_R, thermal resistance, and SOT23 terminal mapping - critical for precision biasing, clamping, and reference design in space-constrained PCBs.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable 5.1 V across its cathode-anode terminals under regulated current conditions (I_Z = 5 mA), with hard breakdown knee and very low leakage current per PZU84-B series specification. Its differential resistance of 250 Ω (typ) ensures minimal voltage shift under load variation.

Designed for surface-mount use on FR4 PCBs with single-sided 70 μm copper, it exhibits R_th(j-a) = 500 K/W and R_th(j-sp) = 330 K/W, supporting reliable thermal dissipation up to 250 mW continuous and 40 W non-repetitive peak surge (t_p = 100 μs).

Key Specifications

Parameter	Value and Actual Design Meaning
V_Z @ I_Z = 5 mA	4.80 V to 5.40 V - defines tight 5.1 V nominal regulation window for precision reference applications
r_dif	250 Ω (typ) - low dynamic impedance minimizes output voltage deviation during current transients
I_R @ V_R = 1 V	≤ 2 μA - ultra-low leakage preserves accuracy in high-impedance bias networks
P_tot	250 mW - maximum continuous power dissipation on standard FR4 PCB, limiting usable I_Z range
T_j max	150 °C - junction temperature limit constrains ambient operating range and heatsinking requirements
C_d @ f = 1 MHz	300 pF - junction capacitance affects high-frequency noise suppression capability in clamp circuits
S_Z	−2.7 mV/K (typ) - negative temperature coefficient enables compensation in bandgap references

Pinout & Package

SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with three terminals: anode (Pin 1), not connected (Pin 2), cathode (Pin 3). Pin 2 is internally unconnected and must remain floating in layout.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode	Forward current entry point; connects to lower-potential node in reverse-biased Zener configuration
2	Not connected	No internal bond wire; must be left unconnected on PCB to avoid parasitic coupling or shorting
3	Cathode	Reverse-bias terminal; connects to regulated voltage node and serves as thermal path to solder point (R_th(j-sp) = 330 K/W)

Key Features

Feature	Design Value
±2 % V_Z tolerance	Enables direct replacement in 5.1 V reference designs without calibration adjustment
Hard breakdown knee	Ensures sharp, predictable turn-on behavior for reliable overvoltage clamping
Very low leakage (≤2 μA @ 1 V)	Maintains regulation accuracy in high-resistance divider networks and battery-powered systems
Optimized for FR4 PCB mounting	Thermal performance validated on standard 70 μm copper, eliminating need for custom thermal pads
SOT23 footprint compatibility	Supports automated placement and reflow using industry-standard 0.6 mm solder land pattern

Applications

Power Supply Feedback Reference

Overvoltage Clamp Protection

Use Scenario: Stabilizing output voltage in isolated DC-DC converter feedback loop via optocoupler-coupled TL431 alternative.

IC Role / Device Role / Timing Role: Zener diode provides fixed 5.1 V reference to comparator input, enabling accurate error signal generation.

Use Value: Tight ±2 % tolerance and low r_dif ensure <±10 mV output regulation drift across line/load variations.

Use Scenario: Protecting microcontroller GPIO pins from ESD-induced voltage spikes on industrial sensor interface lines.

IC Role / Device Role / Timing Role: Acts as shunt clamp between signal line and ground, conducting only when transient exceeds 5.1 V.

Use Value: Hard breakdown knee and 40 W non-repetitive surge rating absorb 100 μs transients without degradation.

Low-Power Bias Network

Temperature-Compensated Reference

Use Scenario: Generating stable bias voltage for op-amp input stages in portable medical instrumentation.

IC Role / Device Role / Timing Role: Supplies clean 5.1 V reference to high-impedance amplifier inputs, minimizing quiescent current draw.

Use Value: ≤2 μA leakage prevents loading of high-Z dividers, preserving signal integrity in sub-μA standby modes.

Use Scenario: Compensating thermal drift in analog front-end circuits requiring stable reference over −40 °C to +85 °C.

IC Role / Device Role / Timing Role: Paired with positive-TC component to form zero-TC reference node using its −2.7 mV/K coefficient.

Use Value: Predictable, linear temperature coefficient enables first-order drift cancellation without trimming.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C5V1	±5 % tolerance, higher r_dif (400 Ω typ), 5 μA max I_R @ 1 V	Acceptable where cost sensitivity outweighs precision; less suitable for low-leakage bias networks	Select for cost-driven consumer applications where ±5 % V_Z meets system margin
MMSZ5231B	±5 % tolerance, 1500 Ω r_dif, 5 μA I_R, SOD-123 package (larger footprint)	Lower power density and inferior thermal resistance (R_th(j-a) ≈ 625 K/W); unsuitable for dense layouts	Choose only if SOD-123 is already standardized in legacy designs and board area is not constrained

Compared with BZX84-C5V1 and MMSZ5231B, PZU84-B5V1R delivers superior regulation precision, lower dynamic impedance, and tighter leakage control in the smallest SOT23 footprint - making it optimal for modern compact, low-power, and high-accuracy analog subsystems.

Availability

PZU84-B5V1R is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp protection, and low-power bias network applications requiring stable component supply, consistent parametric performance, and long-term obsolescence mitigation.

Supply support for PZU84-B5V1R 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, delivering energy-efficient solutions for automotive, industrial, and consumer markets.

The PZU84 series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered specifically for precision voltage reference and clamping in space-constrained, low-power SMT applications with stringent leakage and stability requirements.

FAQ

What is the maximum continuous reverse power dissipation for PZU84-B5V1R?

The maximum continuous reverse power dissipation is 250 mW at T_amb = 25 °C on a standard FR4 PCB with single-sided 70 μm copper. This value decreases linearly above 25 °C at a rate defined by R_th(j-a) = 500 K/W, reaching zero at T_amb = 150 °C.

Does Pin 2 require PCB connection or grounding?

No - Pin 2 is explicitly marked "not connected" in the official pinning diagram and has no internal bond wire. It must remain electrically floating on the PCB; connecting it risks parasitic coupling, unintended current paths, or mechanical stress on the die attach.

How does the −2.7 mV/K temperature coefficient impact circuit design?

This negative temperature coefficient allows predictable voltage drift of −2.7 mV per Kelvin rise in junction temperature. Designers leverage it in temperature-compensated references by pairing with positive-TC components (e.g., forward-biased diodes) to achieve near-zero net drift over operating range.

Can PZU84-B5V1R replace BZX84-C5V1 in existing designs without layout changes?

Yes - both share identical SOT23 package dimensions, pinout (anode–NC–cathode), and footprint. However, due to tighter ±2 % tolerance and lower r_dif, PZU84-B5V1R may improve regulation accuracy but requires verification of reduced leakage impact on high-impedance nodes.

PZU84-B5V1R Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: PZU84

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 5.1 V

Tolerance:: ±2%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 60 Ohms

Current - Reverse Leakage @ Vr:: 2 µA @ 1.5 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

PZU84-B5V1R FAQ

1.How can I place an order for PZU84-B5V1R through Aetrix?

Please submit a Request for Quotation (RFQ) for PZU84-B5V1R 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 PZU84-B5V1R reliable?

The price and inventory of PZU84-B5V1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU84-B5V1R is usually 5 days.

3.What payment methods are accepted for PZU84-B5V1R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-B5V1R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PZU84-B5V1R?

PZU84-B5V1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PZU84-B5V1R 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 PZU84-B5V1R?

For technical support, including PZU84-B5V1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-B5V1R requirements.

6.How does Aetrix verify that PZU84-B5V1R is sourced from the original manufacturer or authorized distributors?

All PZU84-B5V1R 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 PZU84-B5V1R meets industry standards.

7.What is the process for return or replacement of PZU84-B5V1R?

All PZU84-B5V1R units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-B5V1R, 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 PZU84-B5V1R part is unused and in its original packaging.

Return procedure for PZU84-B5V1R:

1.Submit a request within 90 days.

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

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