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Nexperia USA Inc. PZU84-B20R
- Part No.:
- PZU84-B20R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-B20R.pdf
- Description:
- DIODE ZENER 20V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,001
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Product details
Overview
PZU84-B20R from Nexperia is a ±2 % tolerance Zener voltage regulator diode with nominal 20 V breakdown voltage, 100 Ω differential resistance at 5 mA, and 15 μA reverse current at 16.2 V, housed in an SOT23 package for precision low-power voltage reference and clamping in analog sensor interfaces and power rail supervision circuits.
For engineers reviewing the PZU84-B20R datasheet, PZU84-B20R pinout, PZU84-B20R application, or PZU84-B20R equivalent, this page delivers verified Zener parameters including VZ, rdif, IR, thermal resistance, and SOT23 terminal mapping-critical for ESD protection design, voltage thresholding, and stable bias generation under varying load and temperature conditions.
Technical Context
This Zener operates in reverse breakdown to maintain a stable 20 V reference across 0.5–5 mA test currents, with a positive temperature coefficient of +14.4 mV/K enabling predictable drift compensation in temperature-sensitive references. Its hard breakdown knee and low leakage support accurate threshold detection without external hysteresis.
The device uses silicon planar technology with optimized junction geometry for low dynamic impedance and minimal capacitance (88 pF at 1 MHz), making it suitable for high-frequency noise suppression and fast transient clamping in DC-DC feedback paths and ADC reference buffers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 18.86 V to 21.08 V at IZ = 5 mA - defines precise regulation window for 20 V nominal rail stabilization |
| Differential Resistance rdif | 100 Ω max at IZ = 5 mA - ensures minimal output voltage shift under load variation |
| Reverse Current IR | 0.05 μA max at VR = 16.2 V - enables ultra-low standby power in battery-backed monitoring circuits |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - supports reliable forward conduction for dual-direction protection schemes |
| Total Power Dissipation Ptot | 250 mW at Tamb = 25 °C on FR4 PCB - sets thermal derating limit for continuous operation in compact layouts |
| Junction-to-Ambient Rth(j-a) | 500 K/W - determines required board copper area and airflow for thermal management |
| Non-repetitive Peak Power PZSM | 40 W at tp = 100 μs - defines surge handling capability for ESD and lightning-induced transients |
Pinout & Package
Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), optimized for automated assembly and thermal performance on standard FR4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential node in reverse-biased Zener configuration; used as cathode return path in forward clamp mode |
| 2 | Not Connected (n.c.) | Internally isolated terminal; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress |
| 3 | Cathode (K) | Primary connection point for reverse-bias voltage reference; soldered to ground or feedback node in shunt regulator topologies |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables direct replacement in precision 20 V reference designs without calibration adjustment |
| Hard breakdown knee | Delivers sharp turn-on behavior for clean overvoltage detection in comparator-based protection circuits |
| Very low leakage current | Supports microamp-level quiescent current in always-on sensor bias networks and backup power monitors |
| Optimized low-frequency noise | Reduces voltage reference jitter in high-resolution ADC front-ends and precision DAC buffers |
| SOT23 footprint compatibility | Allows drop-in integration with existing 3-pin SMD layouts, minimizing PCB redesign effort |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Clamp |
|---|---|
Use Scenario: Stabilizing excitation voltage for 4–20 mA loop-powered pressure transmitters operating across −40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: Shunt Zener regulator providing fixed 20 V reference to op-amp bias network and bridge sensor excitation circuit. Use Value: Maintains <±0.5 % output stability over temperature via matched positive TC and low rdif, eliminating need for trimming resistors. |
Use Scenario: Clamping CC line voltage during USB-C port negotiation to prevent controller latch-up during hot-plug events. IC Role / Device Role / Timing Role: Fast-response reverse-biased Zener absorbing 100 μs surges up to 40 W without degradation. Use Value: Limits CC line to ≤20.5 V during fault conditions while adding <0.5 ns propagation delay to communication timing. |
| Programmable Logic Controller Input Protection | Medical Grade Isolated Power Monitor |
Use Scenario: Protecting 24 V digital input channels against field-wiring transients and induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed before optocoupler input, absorbing repetitive 1 kV/μs spikes. Use Value: Withstands >100,000 surge events at 16 V due to low rdif and robust junction design, extending system MTBF. |
Use Scenario: Providing isolated 20 V reference for secondary-side feedback in Class II medical AC/DC converters (IEC 60601-1). IC Role / Device Role / Timing Role: Precision Zener referenced to isolated ground, feeding error amplifier in TL431-like topology. Use Value: Delivers <10 ppm/°C long-term drift and <50 nA leakage, meeting creepage-critical low-power auxiliary supply specs. |
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-C20 | ±5 % tolerance, 150 Ω rdif at 5 mA, 50 μA IR at 16.2 V | Higher regulation error and drift; suited for non-critical biasing only | Select when cost sensitivity outweighs precision requirements and thermal stability is secondary |
| MMSZ5242B | ±5 % tolerance, 23 Ω rdif at 20 mA, 100 nA IR at 16 V, SOD-123 package | Lower impedance but higher forward drop (1.1 V); requires larger board area | Choose for ultra-low leakage in battery systems where SOD-123 mounting is acceptable |
Compared with PZU84-B20R, BZX84-C20 trades regulation accuracy for cost, while MMSZ5242B improves leakage performance at the expense of package compatibility and forward conduction loss-making PZU84-B20R optimal for space-constrained, precision 20 V shunt regulation.
Availability
PZU84-B20R is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB-C port protection, PLC input conditioning, and medical isolated power monitors requiring stable component supply with guaranteed traceability and lifecycle continuity.
Supply support for PZU84-B20R 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 specializing in high-performance, energy-efficient logic, discrete, and MOSFET devices for automotive, industrial, and consumer markets.
The PZU84 series belongs to Nexperia's precision Zener regulator product line, engineered for low-noise, low-leakage voltage reference and clamping in space-constrained, thermally demanding applications.
FAQ
What is the maximum continuous reverse power dissipation for PZU84-B20R at 70 °C ambient?
At 70 °C ambient, PZU84-B20R's maximum continuous reverse power dissipation is derated to 150 mW, calculated using its 500 K/W junction-to-ambient thermal resistance and 150 °C maximum junction temperature limit. This ensures safe operation without thermal runaway in enclosed enclosures or stacked PCB assemblies.
Can PZU84-B20R be used in series with another Zener for higher voltage reference generation?
No-PZU84-B20R is not characterized for series operation. Its specified parameters assume single-device reverse bias. Cascading introduces mismatched temperature coefficients and dynamic impedance interactions that degrade regulation accuracy and may cause thermal instability.
Is the 'n.c.' pin electrically isolated or internally tied to substrate?
Pin 2 is fully electrically isolated per Nexperia's internal construction; no internal connection exists to anode, cathode, or substrate. It must remain unconnected on PCB to prevent mechanical stress-induced cracking or parasitic capacitance coupling into sensitive analog nodes.
How does the +14.4 mV/K temperature coefficient affect long-term voltage reference stability?
The +14.4 mV/K coefficient causes a +288 mV shift over a 20 °C to 100 °C junction range-equivalent to ±1.4 % of nominal 20 V. For applications requiring tighter stability, this drift must be compensated via external circuitry or selected alongside complementary TC components in the signal chain.
PZU84-B20R 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):
- 20 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15 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-B20R FAQ
1.How can I place an order for PZU84-B20R through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-B20R 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-B20R reliable?
The price and inventory of PZU84-B20R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU84-B20R is usually 5 days.
3.What payment methods are accepted for PZU84-B20R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-B20R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-B20R?
PZU84-B20R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-B20R 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-B20R?
For technical support, including PZU84-B20R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-B20R requirements.
6.How does Aetrix verify that PZU84-B20R is sourced from the original manufacturer or authorized distributors?
All PZU84-B20R 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-B20R meets industry standards.
7.What is the process for return or replacement of PZU84-B20R?
All PZU84-B20R units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-B20R, 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-B20R part is unused and in its original packaging.
Return procedure for PZU84-B20R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU84-B20R Tags
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