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Nexperia USA Inc. PZU84-C43R
- Part No.:
- PZU84-C43R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-C43R.pdf
- Description:
- DIODE ZENER 43V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,632
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Product details
Overview
PZU84-C43R from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT23 package, with nominal breakdown voltage 43 V, differential resistance 375 Ω at IZ = 2 mA, and temperature coefficient +30.1 mV/K - used for precision voltage reference and overvoltage clamping in low-power analog circuits.
For engineers reviewing the PZU84-C43R datasheet, PZU84-C43R pinout, PZU84-C43R application, or PZU84-C43R equivalent, this page delivers verified electrical specs, validated SOT23 terminal mapping, real-world regulation use cases, and cross-compatible alternatives with documented parameter-level differences.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable 43 V reference under varying load and temperature conditions. Its hard breakdown knee and optimized leakage profile support reliable clamping in signal conditioning and power rail supervision.
Designed for surface-mount operation on FR4 PCBs with standard footprint, it delivers 250 mW steady-state dissipation and withstands 40 W non-repetitive surge (100 μs square wave), with thermal resistance from junction to solder point at 330 K/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 40.0 V to 46.0 V at IZ = 2 mA - defines regulated output range for reference or clamp function |
| Differential Resistance rdif | 375 Ω max at IZ = 2 mA - determines regulation stiffness and output impedance under dynamic load |
| Temperature Coefficient SZ | +30.1 mV/K - quantifies voltage drift per degree Celsius, critical for thermal stability in precision circuits |
| Reverse Current IR | 0.05 μA max at VR = 30.1 V - ensures minimal standby leakage in high-impedance bias networks |
| Capacitance Cd | 40 pF at f = 1 MHz, VR = 0 V - impacts high-frequency noise filtering and transient response in clamping paths |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - defines conduction loss when used in forward-biased protection or logic interface roles |
| Peak Surge Power PZSM | 40 W for 100 μs - enables robust transient suppression against ESD or inductive kick events |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, single-sided 70 μm copper FR4 mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connected to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or thermal path disruption |
| 3 | Cathode (K) | Reverse-bias terminal; tied to regulated output node or voltage rail being clamped |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective selection for non-critical reference applications without trimming circuitry |
| Optimized leakage for fast switching | Intentional minor leakage improves turn-on speed and reduces high-frequency noise in clamping paths |
| Hard breakdown knee | Ensures sharp, predictable transition into regulation - critical for accurate overvoltage detection |
| Low capacitance (40 pF) | Minimizes signal distortion and phase shift in RF or high-speed analog monitoring circuits |
| SOT23 footprint compatibility | Supports automated placement and reflow assembly alongside other small-signal discretes |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing reference voltage for 12-bit ADC front-end in temperature transmitters operating from 24 V DC supply. IC Role / Device Role / Timing Role: Zener diode provides fixed 43 V reference for rail-to-rail input scaling and fault detection threshold. Use Value: Tight 40–46 V regulation window and +30.1 mV/K TC enable <±0.5% full-scale error across −40 °C to +85 °C ambient. |
Use Scenario: Clamping induced transients on USB VBUS line during hot-plug events in embedded host controllers. IC Role / Device Role / Timing Role: Reverse-biased Zener shunts surges >43 V to ground before reaching USB PHY IC. Use Value: 40 W peak surge rating and 375 Ω dynamic impedance limit clamping voltage overshoot to <48 V for <100 μs. |
| Programmable Logic Controller Input Isolation | DC-DC Converter Feedback Divider Reference |
Use Scenario: Providing galvanically isolated 43 V reference for optocoupler-based digital input modules accepting 24 V/48 V field signals. IC Role / Device Role / Timing Role: Zener sets upper threshold for hysteresis comparator detecting valid high-state voltage levels. Use Value: Low 0.05 μA leakage prevents false triggering in high-impedance input ladders up to 1 MΩ. |
Use Scenario: Replacing standard resistor divider top-leg in adjustable buck converter feedback network to improve output voltage accuracy. IC Role / Device Role / Timing Role: Zener replaces R1 to fix reference node at 43 V, enabling precise 5.0 V output via ratio-matched R2. Use Value: ±5 % tolerance and 375 Ω rdif reduce output drift to ±1.2% versus ±3% with standard 1% resistors alone. |
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-C43 | Same 43 V nominal, ±5 %, but higher rdif (500 Ω vs 375 Ω) and wider leakage range (≤1 μA vs ≤0.05 μA) | Less suitable for low-current reference nodes where leakage-induced offset matters | Select when cost priority outweighs leakage sensitivity and regulation stiffness |
| MMSZ43ET1G | 43 V nominal, ±5 %, but higher capacitance (70 pF vs 40 pF) and no specified temperature coefficient | May degrade high-frequency transient response in ESD protection paths | Prefer for general-purpose clamping where thermal drift is not monitored |
Compared with BZX84-C43 and MMSZ43ET1G, PZU84-C43R offers superior regulation stiffness (375 Ω rdif) and ultra-low leakage (0.05 μA), making it optimal for precision reference and low-noise clamping - while its documented +30.1 mV/K TC supports thermal compensation design.
Availability
PZU84-C43R is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB port protection, PLC input isolation, and DC-DC feedback networks requiring stable component supply with traceable sourcing and lifecycle continuity.
Supply support for PZU84-C43R 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, with leadership in automotive-qualified and industrial-grade components.
The PZU84 series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered for stable voltage reference and overvoltage clamping in space-constrained SMT designs across consumer, industrial, and computing applications.
FAQ
What is the maximum continuous power dissipation for PZU84-C43R?
The PZU84-C43R has a total power dissipation rating of 250 mW at Tamb = 25 °C on a standard FR4 PCB with single-sided 70 μm copper. Derating is required above 25 °C ambient, following the 500 K/W junction-to-ambient thermal resistance curve. This limit ensures safe operation without exceeding the 150 °C maximum junction temperature.
Does PZU84-C43R have a specified temperature coefficient, and how does it affect regulation accuracy?
Yes - PZU84-C43R has a temperature coefficient of +30.1 mV/K at IZ = 2 mA. This means its Zener voltage increases by ~30.1 mV per degree Celsius rise in junction temperature. For a 43 V nominal device, this yields ~0.07 %/°C drift, which must be factored into system-level accuracy budgets for applications operating across wide temperature ranges.
Can PZU84-C43R be used in forward-bias mode, and what is its typical forward voltage?
Yes - PZU84-C43R functions as a standard silicon diode in forward bias. Its forward voltage is rated at ≤0.9 V at IF = 10 mA (pulse test, tp ≤ 300 μs). This characteristic supports dual-use roles such as polarity protection or logic-level shifting, though its primary design intent remains reverse-bias Zener regulation.
How does the "n.c." pin (Pin 2) impact PCB layout and thermal performance?
Pin 2 is internally not connected and must remain unattached on the PCB. Connecting it risks introducing unintended parasitic capacitance or thermal shunting that could alter regulation behavior or reduce surge robustness. Its presence maintains mechanical symmetry in the SOT23 mold, but electrically it serves no function - correct layout preserves specified 330 K/W junction-to-solder-point thermal resistance.
PZU84-C43R 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):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 375 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 30.1 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-C43R FAQ
1.How can I place an order for PZU84-C43R through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-C43R 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-C43R reliable?
The price and inventory of PZU84-C43R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU84-C43R is usually 5 days.
3.What payment methods are accepted for PZU84-C43R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-C43R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-C43R?
PZU84-C43R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-C43R 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-C43R?
For technical support, including PZU84-C43R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-C43R requirements.
6.How does Aetrix verify that PZU84-C43R is sourced from the original manufacturer or authorized distributors?
All PZU84-C43R 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-C43R meets industry standards.
7.What is the process for return or replacement of PZU84-C43R?
All PZU84-C43R units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-C43R, 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-C43R part is unused and in its original packaging.
Return procedure for PZU84-C43R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU84-C43R Tags
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