Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Nexperia USA Inc. PDZ20B,115

Name: PDZ20B,115
Brand: Nexperia USA Inc.
SKU: PDZ20B,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: PDZ20B,115

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-76, SOD-323

Datasheet:: PDZ20B,115.pdf

Description:: DIODE ZENER 20V 400MW SOD323

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:8,411

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

PDZ20B,115 from Nexperia is a single silicon Zener diode designed for low-power voltage regulation in surface-mounted applications, with a nominal Zener voltage of 20 V (19.52–20.39 V at I_Z = 5 mA), ±2 % tolerance, 100 Ω maximum differential resistance at 5 mA, 0.05 μA maximum reverse current at V_R = 15 V, and 400 mW total power dissipation on FR4 PCB.

For engineers reviewing the PDZ20B,115 datasheet, PDZ20B,115 pinout, PDZ20B,115 application, or PDZ20B,115 equivalent, this device serves as a precision shunt regulator in power supply feedback paths, reference voltage generation, and overvoltage protection circuits where compact SOD323 packaging and stable low-current Zener characteristics are required.

Technical Context

The PDZ20B,115 operates as a two-terminal shunt regulator, maintaining a stable reverse-biased breakdown voltage across its anode and cathode under controlled current conditions. Its Zener voltage exhibits a positive temperature coefficient of +16.4 mV/K at I_Z = 5 mA, enabling predictable thermal drift behavior in bias networks.

It features hard breakdown knee characteristics and low leakage (≤0.05 μA at 15 V), supporting accurate voltage clamping in low-quiescent-current designs. Thermal resistance from junction to ambient is 340 K/W on standard FR4 PCB, limiting continuous power handling above 25 °C per the derating curve.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	19.52–20.39 V at I_Z = 5 mA - defines precise clamping threshold for feedback or protection circuits
Differential Resistance r_dif	≤100 Ω at I_Z = 5 mA - ensures minimal voltage shift under load current variation
Reverse Current I_R	≤0.05 μA at V_R = 15 V - enables ultra-low standby power in battery-backed references
Power Dissipation P_tot	400 mW at T_amb ≤ 25 °C on FR4 - sets maximum continuous DC power before thermal derating applies
Forward Voltage V_F	0.9 V at I_F = 10 mA - supports use as polarity indicator or low-drop rectifier in auxiliary paths
Thermal Resistance R_th(j-a)	340 K/W - determines junction temperature rise under given ambient and power conditions
Package	SOD323 (SC-76) - 1.35 × 1.75 mm footprint optimized for high-density automated assembly

Pinout & Package

PDZ20B,115 is housed in a plastic surface-mounted SOD323 (SC-76) package with two leads: anode (A) and cathode (K). The cathode is marked by a bar on the device body. Mounting follows JEDEC-standard reflow footprint (0.6 mm pad width, 0.5 mm spacing).

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (K)	Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs
2	Anode (A)	Connected to ground or lower-potential reference; completes current path during regulation

Key Features

Feature	Design Value
Low dynamic impedance at low currents	100 Ω max at 5 mA - improves regulation accuracy in micro-power feedback loops
Hard breakdown knee	Sharp, well-defined V_Z transition - reduces ambiguity in clamping onset for protection circuits
Very low leakage current	0.05 μA max at 15 V - preserves battery life in always-on monitoring systems
±2 % voltage tolerance	Tight initial calibration - minimizes need for external trimming in precision references
SOD323 package compatibility	Standardized 1.35 × 1.75 mm outline - ensures drop-in replacement and pick-and-place compatibility

Applications

Power Supply Feedback Regulation

Reference Voltage Generation

Use Scenario: Stabilizing output voltage in isolated flyback or buck converter feedback networks using optocoupler-coupled error amplifiers.

IC Role / Device Role: Shunt reference providing precise 20 V threshold to control duty cycle via secondary-side error signal.

Use Value: Enables ±1 % output regulation without external op-amp, leveraging tight V_Z tolerance and low r_dif.

Use Scenario: Generating a stable 20 V reference for ADC biasing or sensor excitation in industrial data acquisition modules.

IC Role / Device Role: Passive voltage reference source supplying low-noise, temperature-compensated potential to analog front-end circuitry.

Use Value: Delivers <0.05 μA leakage and +16.4 mV/K TC, allowing predictable drift compensation in firmware or hardware.

Overvoltage Protection Clamp

ESD-Suppressed Signal Line Biasing

Use Scenario: Protecting microcontroller I/O pins against transient surges exceeding 20 V in automotive body electronics.

IC Role / Device Role: Fast-acting shunt clamp diverting excess energy to ground when input exceeds V_Z.

Use Value: Hard breakdown knee ensures rapid conduction onset, limiting peak voltage to ≤20.4 V before damage occurs.

Use Scenario: Biasing RS-485 receiver inputs to 20 V common-mode level while suppressing ESD events on communication lines.

IC Role / Device Role: DC bias element with integrated transient suppression capability due to low r_dif and robust surge rating (1.5 A non-repetitive).

Use Value: Eliminates need for separate TVS + bias resistor, reducing BOM count and board space in full-duplex transceivers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-B20,115	Same SOD323 package, identical 20 V nominal V_Z, but higher r_dif (120 Ω vs. 100 Ω) and looser tolerance (±5 % vs. ±2 %)	Acceptable where cost sensitivity outweighs regulation precision; less suitable for feedback loops requiring tight stability	Select when budget constraints dominate and ±5 % V_Z drift is acceptable in final system margin
MMSZ4684T1G	Higher P_tot (500 mW), larger SOD123 package (3.7 × 1.6 mm), same V_Z range but wider tolerance (±5 %) and higher leakage (0.1 μA)	Better thermal performance in high-ambient environments, but incompatible with ultra-dense layouts requiring SOD323	Choose when board-level thermal management is challenging and footprint flexibility exists

Compared with BZX384-B20,115 and MMSZ4684T1G, PDZ20B,115 offers superior voltage precision and lower dynamic impedance in the smallest footprint-making it optimal for space-constrained, high-accuracy regulation where thermal load remains within 400 mW limits.

Availability

PDZ20B,115 is available at Aetrix Electronics and suitable for power supply feedback regulation, precision reference generation, overvoltage protection clamping, and ESD-suppressed signal line biasing requiring stable component supply and consistent parametric performance across production lots.

Supply support for PDZ20B,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 discrete, logic, and MOSFET solutions, headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.

The PDZ-B series targets low-power, surface-mount voltage regulation needs in consumer, industrial, and computing applications-designed specifically for compactness, tight tolerance, and stable low-current Zener operation in space-constrained PCBs.

FAQ

What is the maximum continuous reverse current the PDZ20B,115 can sustain without degradation?

The PDZ20B,115 is rated for continuous Zener current up to 20 mA at 25 °C ambient, derived from its 400 mW power limit and 20 V V_Z. At higher temperatures, current must be reduced per the derating curve-e.g., ~12 mA at 70 °C ambient-to maintain junction temperature below 150 °C.

Does the PDZ20B,115 require a series current-limiting resistor in all applications?

Yes-operation in Zener mode requires a series resistor to limit current to safe levels based on supply voltage and desired regulation point. For example, with a 24 V input and target I_Z = 5 mA, a 820 Ω resistor sets appropriate bias while keeping power within 400 mW limits.

How does the +16.4 mV/K temperature coefficient affect long-term voltage stability?

The positive temperature coefficient means V_Z increases by ~16.4 mV per Kelvin rise in junction temperature. Over a 50 °C rise (e.g., 25 °C to 75 °C), V_Z shifts ~0.82 V-requiring system-level compensation if sub-1 % absolute stability is needed across temperature.

Can PDZ20B,115 be used in forward-bias applications such as LED driver biasing?

Yes-the forward voltage is specified at 0.9 V (10 mA) and 1.1 V (100 mA), making it usable as a low-drop fixed bias element. However, its primary design intent and characterization focus remain reverse-bias regulation; forward conduction is secondary and not optimized for high-current switching.

PDZ20B,115 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: PDZ-B

Package/Case:: SC-76, SOD-323

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 20 V

Tolerance:: ±2%

Power - Max:: 400 mW

Impedance (Max) (Zzt):: 20 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 15 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-323

PDZ20B,115 FAQ

1.How can I place an order for PDZ20B,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for PDZ20B,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 PDZ20B,115 reliable?

The price and inventory of PDZ20B,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ20B,115 is usually 5 days.

3.What payment methods are accepted for PDZ20B,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ20B,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PDZ20B,115?

PDZ20B,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PDZ20B,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 PDZ20B,115?

For technical support, including PDZ20B,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ20B,115 requirements.

6.How does Aetrix verify that PDZ20B,115 is sourced from the original manufacturer or authorized distributors?

All PDZ20B,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 PDZ20B,115 meets industry standards.

7.What is the process for return or replacement of PDZ20B,115?

All PDZ20B,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDZ20B,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 PDZ20B,115 part is unused and in its original packaging.

Return procedure for PDZ20B,115:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…