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

NXP Semiconductors PZU6.8B,115

Name: PZU6.8B,115
Brand: NXP Semiconductors
SKU: PZU6.8B,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PZU6.8B,115

Manufacturer:: NXP Semiconductors

Category:: Single Zener Diodes

Package:: -

Datasheet:: PZU6.8B,115.pdf

Description:: DIODE ZENER 6.8V 310MW SOD323F

Quantity:: RFQ Add To RFQ list

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Inventory:12,800

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Product details

Overview

PZU6.8B,115 from NXP Semiconductors is a single Zener diode in SOD323F (SC-90) surface-mount package, designed for precision voltage regulation at 6.8 V nominal Zener voltage with ±5 % tolerance. It delivers 60 Ω maximum differential resistance at I_Z = 5 mA, supports 20 nA reverse current at V_R = 5.5 V, and operates across −65 °C to +150 °C ambient temperature - used in low-power reference and overvoltage protection circuits.

For engineers reviewing the PZU6.8B,115 datasheet, PZU6.8B,115 pinout, PZU6.8B,115 application, or PZU6.8B,115 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (R_th(j-a) = 400 K/W standard footprint), power dissipation limit (310 mW at T_amb ≤ 25 °C), and SOD323F footprint compatibility with high-density PCB layouts.

Technical Context

The PZU6.8B,115 functions as a two-terminal voltage reference device operating in reverse breakdown mode. Its Zener voltage is specified at 5 mA test current, with temperature coefficient of +3.4 mV/K and typical capacitance of 3.5 pF at 1 MHz and 0 V reverse bias.

It exhibits non-repetitive peak reverse current capability of 215 A under 100 μs square-wave surge conditions, and its thermal performance is defined for two mounting configurations: standard FR4 footprint (R_th(j-a) = 400 K/W) and enhanced cathode pad (R_th(j-a) = 230 K/W).

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	6.47 V to 7.14 V at I_Z = 5 mA - defines stable regulation range for feedback or clamping
Tolerance	±5 % (B grade) - enables predictable voltage setting without post-production trimming
Differential Resistance r_dif	≤60 Ω at I_Z = 5 mA - ensures low output impedance for stable reference under load variation
Reverse Current I_R	≤20 nA at V_R = 5.5 V - minimizes leakage in high-impedance bias networks
Total Power Dissipation	310 mW at T_amb ≤ 25 °C - sets maximum continuous DC power in standard PCB layout
Thermal Resistance R_th(j-a)	400 K/W (standard footprint) - determines junction temperature rise per watt in typical routing
Operating Temperature	−65 °C to +150 °C - supports automotive under-hood and industrial control environments

Pinout & Package

SOD323F (SC-90) plastic surface-mounted package: 2.3 mm × 1.35 mm body, 0.65 mm height, gull-wing leads, cathode marked by bar on top surface.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode	Connected to regulated output node; polarity marker aligns with PCB silkscreen bar
2	Anode	Connected to ground or lower-potential rail; forms reverse-biased junction during regulation

Key Features

Feature	Design Value
Ultra-small SMD footprint	SOD323F package enables placement in space-constrained designs such as wearables and sensor modules
Low Zener impedance	60 Ω differential resistance improves regulation stability against dynamic load changes
Negligible leakage current	20 nA reverse current at 5.5 V preserves battery life in always-on monitoring circuits
Wide temperature operation	−65 °C to +150 °C rating supports deployment in harsh-environment industrial controllers
Controlled temperature coefficient	+3.4 mV/K enables predictable drift compensation in precision analog references

Applications

Voltage Reference for ADC Biasing	Overvoltage Clamp in USB Interface
Use Scenario: Provides stable 6.8 V reference to bias analog front-end circuitry feeding a 12-bit SAR ADC in an industrial data logger. IC Role / Device Role / Timing Role: Zener diode acts as passive voltage reference source, establishing fixed reference potential independent of supply rail fluctuations. Use Value: Enables <1 LSB integral nonlinearity error by maintaining reference stability within ±0.34 % over 0–70 °C operating range.	Use Scenario: Protects 5 V USB data lines from transient surges exceeding 6.8 V during hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Functions as shunt clamp, conducting excess current when line voltage exceeds Zener breakdown threshold. Use Value: Limits transient voltage to ≤7.14 V (max V_Z) with 215 A surge handling capacity, preventing damage to downstream PHY ICs.
Power Supply Feedback Divider	Microcontroller Reset Threshold
Use Scenario: Sets feedback voltage point in isolated flyback converter secondary-side regulation loop using optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Zener diode establishes precise 6.8 V threshold that triggers error amplifier correction when output deviates. Use Value: Achieves ±1.5 % output voltage regulation accuracy due to tight ±5 % V_Z tolerance and low r_dif.	Use Scenario: Generates clean reset signal for ARM Cortex-M0 microcontroller by clamping V_DD monitor node at 6.8 V during brown-out conditions. IC Role / Device Role / Timing Role: Acts as voltage threshold detector in discrete reset circuit, pulling reset line low when supply drops below 6.47 V. Use Value: Ensures deterministic reset assertion with 0.67 V hysteresis margin between turn-on (6.47 V) and turn-off (7.14 V) thresholds.

Voltage Reference for ADC Biasing

Overvoltage Clamp in USB Interface

Use Scenario: Provides stable 6.8 V reference to bias analog front-end circuitry feeding a 12-bit SAR ADC in an industrial data logger.

IC Role / Device Role / Timing Role: Zener diode acts as passive voltage reference source, establishing fixed reference potential independent of supply rail fluctuations.

Use Value: Enables <1 LSB integral nonlinearity error by maintaining reference stability within ±0.34 % over 0–70 °C operating range.

Use Scenario: Protects 5 V USB data lines from transient surges exceeding 6.8 V during hot-plug events or ESD discharge.

IC Role / Device Role / Timing Role: Functions as shunt clamp, conducting excess current when line voltage exceeds Zener breakdown threshold.

Use Value: Limits transient voltage to ≤7.14 V (max V_Z) with 215 A surge handling capacity, preventing damage to downstream PHY ICs.

Power Supply Feedback Divider

Microcontroller Reset Threshold

Use Scenario: Sets feedback voltage point in isolated flyback converter secondary-side regulation loop using optocoupler-coupled error amplifier.

IC Role / Device Role / Timing Role: Zener diode establishes precise 6.8 V threshold that triggers error amplifier correction when output deviates.

Use Value: Achieves ±1.5 % output voltage regulation accuracy due to tight ±5 % V_Z tolerance and low r_dif.

Use Scenario: Generates clean reset signal for ARM Cortex-M0 microcontroller by clamping V_DD monitor node at 6.8 V during brown-out conditions.

IC Role / Device Role / Timing Role: Acts as voltage threshold detector in discrete reset circuit, pulling reset line low when supply drops below 6.47 V.

Use Value: Ensures deterministic reset assertion with 0.67 V hysteresis margin between turn-on (6.47 V) and turn-off (7.14 V) thresholds.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-B6V8,115	Same SOD323F package, identical 6.8 V ±5 % rating, but higher typical r_dif (90 Ω vs. 60 Ω)	Slightly reduced regulation stiffness in high-dynamic-load scenarios	Preferred where legacy BOM alignment outweighs marginal impedance advantage
MMSZ4688T1G	SOD123 package (larger), same 6.8 V ±5 %, higher P_tot (500 mW), higher r_dif (100 Ω)	Requires PCB footprint change; better suited for higher-power dissipation needs	Select when thermal margin >310 mW is required and board area permits larger package

Compared with BZX384-B6V8,115 and MMSZ4688T1G, the PZU6.8B,115 offers lowest differential resistance in SOD323F form factor, enabling tighter voltage regulation in space-constrained, low-power systems without footprint or thermal derating trade-offs.

Availability

PZU6.8B,115 is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and power supply feedback applications requiring stable component supply, consistent parametric performance, and long-term obsolescence management.

Supply support for PZU6.8B,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 markets.

The PZUxB series was developed as a family of general-purpose Zener diodes optimized for high-volume surface-mount manufacturing, emphasizing tight voltage tolerance, small footprint, and robust thermal performance in consumer and industrial power management circuits.

FAQ

What is the Zener voltage tolerance of PZU6.8B,115?

The PZU6.8B,115 has a Zener voltage tolerance of ±5 %, meaning its actual breakdown voltage falls between 6.47 V and 7.14 V when tested at 5 mA. This B-grade tolerance is confirmed in Table 9 of the NXP datasheet and applies specifically to the PZU6.8B,115 variant within the PZUxB series.

Does PZU6.8B,115 support reflow soldering only?

Yes, PZU6.8B,115 is qualified exclusively for reflow soldering per NXP's datasheet Section 10. Wave or hand soldering is not recommended due to thermal stress risks in the SOD323F package. The PZU6.8B,115 must be processed using JEDEC J-STD-020-compliant reflow profiles to ensure reliability and avoid delamination.

What is the maximum reverse current specification for PZU6.8B,115 at 5.5 V?

The PZU6.8B,115 specifies a maximum reverse current (I_R) of 20 nA at V_R = 5.5 V and T_j = 25 °C, as listed in Table 9 of the NXP datasheet. This ultra-low leakage supports high-impedance bias networks and extends battery life in always-on sensing applications using the PZU6.8B,115.

Can PZU6.8B,115 be used in automotive under-hood environments?

Yes, the PZU6.8B,115 is rated for ambient temperatures from −65 °C to +150 °C and meets automotive-grade thermal cycling requirements per its qualification on FR4 PCBs. Its 150 °C maximum junction temperature and robust SOD323F construction make the PZU6.8B,115 suitable for engine control unit (ECU) auxiliary regulation and sensor biasing in under-hood locations.

What does the '115' suffix in PZU6.8B,115 indicate?

The '115' suffix in PZU6.8B,115 denotes the packing method: 3000 units per 4 mm pitch, 8 mm tape-and-reel format, as defined in Table 10 of the NXP datasheet. This distinguishes it from the '135' variant (10,000 units/reel) and confirms the PZU6.8B,115 is supplied in standard small-batch production packaging.

PZU6.8B,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:: -

PZU6.8B,115 FAQ

1.How can I place an order for PZU6.8B,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for PZU6.8B,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 PZU6.8B,115 reliable?

The price and inventory of PZU6.8B,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU6.8B,115 is usually 5 days.

3.What payment methods are accepted for PZU6.8B,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU6.8B,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PZU6.8B,115?

PZU6.8B,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PZU6.8B,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 PZU6.8B,115?

For technical support, including PZU6.8B,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU6.8B,115 requirements.

6.How does Aetrix verify that PZU6.8B,115 is sourced from the original manufacturer or authorized distributors?

All PZU6.8B,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 PZU6.8B,115 meets industry standards.

7.What is the process for return or replacement of PZU6.8B,115?

All PZU6.8B,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU6.8B,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 PZU6.8B,115 part is unused and in its original packaging.

Return procedure for PZU6.8B,115:

1.Submit a request within 90 days.

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

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