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Nexperia USA Inc. PZU84-C39R
- Part No.:
- PZU84-C39R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-C39R.pdf
- Description:
- DIODE ZENER 39V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,040
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Product details
Overview
PZU84-C39R from Nexperia is a precision Zener voltage regulator diode in SOT23 package, designed for stable voltage reference and overvoltage protection in low-power analog and digital circuits. It delivers a nominal 39 V Zener voltage with ±5 % tolerance, 350 Ω differential resistance at 2 mA, and ultra-low reverse leakage (≤0.05 μA at VR = 39 V), enabling accurate clamping in power supply feedback loops and sensor biasing networks.
For engineers reviewing the PZU84-C39R datasheet, PZU84-C39R pinout, PZU84-C39R application, or PZU84-C39R equivalent, this page provides verified electrical parameters, validated SOT23 terminal mapping, real-world use cases in voltage regulation and transient suppression, and technically documented alternative parts with quantified performance trade-offs.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining a stable 39 V reference by conducting reverse current above its breakdown threshold. Its hard-knee breakdown and low dynamic impedance ensure minimal voltage deviation under varying load currents up to 200 mA.
Designed for surface-mount operation on FR4 PCBs, it features a thermal resistance of 330 K/W from junction to solder point and supports non-repetitive surge pulses up to 40 W (100 μs square wave), making it suitable for transient voltage suppression in DC rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 37.0 V to 41.0 V at IZ = 2 mA - defines precise clamping threshold for 39 V nominal rail regulation |
| Differential Resistance (rdif) | 350 Ω max at IZ = 2 mA - ensures <1% voltage shift per 1 mA load variation in feedback paths |
| Reverse Leakage (IR) | ≤0.05 μA at VR = 39 V - prevents parasitic current draw in high-impedance bias networks |
| Power Dissipation (Ptot) | 250 mW at Tamb = 25 °C - supports continuous regulation in space-constrained SOT23 layouts |
| Non-repetitive Peak Power (PZSM) | 40 W for 100 μs - enables robust ESD/transient suppression without derating |
| Junction Temperature (Tj) | −55 °C to +150 °C - guarantees operation across industrial temperature ranges |
Pinout & Package
Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in shunt regulation configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or thermal pad connection |
| 3 | Cathode (K) | Reverse-biased terminal; ties to regulated voltage node and current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective selection for non-critical 39 V references without trimming circuitry |
| Low 350 Ω dynamic impedance at 2 mA | Maintains <±0.7 V regulation error across 0.5–5 mA operating range in feedback networks |
| Hard breakdown knee | Delivers sharp conduction onset at 39 V, minimizing ambiguity in overvoltage detection thresholds |
| Ultra-low 0.05 μA leakage at rated VR | Preserves signal integrity in high-Z sensor interfaces and battery-backed monitoring circuits |
Applications
| Power Supply Feedback Regulation | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Stabilizing output voltage in isolated flyback or buck-derived auxiliary supplies via optocoupler feedback loop. IC Role / Device Role / Timing Role: Shunt reference element providing precise 39 V threshold to control PWM duty cycle through TL431-like comparator input. Use Value: Tight 37–41 V VZ window ensures ±1.3% output accuracy without external calibration. |
Use Scenario: Protecting microcontroller I/O pins and ADC inputs from accidental 48 V bus coupling in industrial fieldbus nodes. IC Role / Device Role / Timing Role: Passive clamp limiting voltage excursion to ≤41 V during transients, diverting surge current to ground. Use Value: 40 W non-repetitive peak power rating absorbs 100 μs surges without degradation. |
| Sensor Bias Reference | Programmable Threshold Detector |
|
Use Scenario: Providing stable excitation voltage for 4–20 mA current-loop pressure sensors in HVAC control modules. IC Role / Device Role / Timing Role: Low-leakage (≤0.05 μA) Zener source ensuring minimal offset error in ratiometric measurement chains. Use Value: Near-zero reverse current preserves accuracy in high-impedance Wheatstone bridge interfaces. |
Use Scenario: Setting trip point for comparator-based brown-out detection in battery-powered IoT edge devices. IC Role / Device Role / Timing Role: Fixed 39 V reference input to LM393 comparator, triggering reset when main rail drops below 39 V × R1/(R1+R2). Use Value: ±5 % tolerance allows predictable 37–41 V hysteresis band without trimming resistors. |
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-C39 | Same 39 V nominal, ±5 % tolerance, but higher 500 Ω rdif at 5 mA and 1 μA IR at VR = 39 V | Less stable under low-current conditions; unsuitable for high-Z bias networks | Select only if cost is primary constraint and leakage <0.1 μA is acceptable |
| MMSZ5241B | 39 V nominal, ±5 %, but 600 Ω rdif at 20 mA and 100 nA IR - optimized for higher test current | Requires ≥5 mA bias for spec compliance; incompatible with sub-1 mA feedback designs | Prefer only when board layout allows higher quiescent current and thermal margin |
Compared with BZX84-C39 and MMSZ5241B, PZU84-C39R offers superior low-current regulation stability (350 Ω rdif at 2 mA vs. ≥500 Ω) and lowest leakage (≤0.05 μA), making it optimal for precision feedback and ultra-low-power sensing where bias current is constrained.
Availability
PZU84-C39R is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface modules, and embedded overvoltage protection circuits requiring stable component supply and consistent parametric performance across production batches.
Supply support for PZU84-C39R 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 delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
The PZU84 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for compact, high-accuracy voltage regulation and transient suppression in space-constrained SMT applications.
FAQ
What is the maximum continuous forward current for PZU84-C39R?
The absolute maximum forward current is 200 mA per the datasheet limiting values table. However, sustained forward conduction is not part of its intended Zener regulation function; the device is rated for reverse-bias operation. Forward voltage remains ≤0.9 V at 10 mA, confirming suitability for brief forward testing but not continuous forward use.
Can PZU84-C39R be used in place of a 39 V Zener with tighter tolerance?
No-PZU84-C39R has a guaranteed ±5 % tolerance (37.0–41.0 V), unlike ±2 % variants such as PZU84-B39 (38.2–39.8 V). Substituting it into designs requiring <±1 % regulation will introduce measurable output error; always verify VZ min/max against system accuracy requirements before replacement.
Is Pin 2 internally connected, and what happens if it's grounded?
Pin 2 is explicitly marked "not connected" in the official pinning diagram and must remain electrically floating. Grounding or routing a trace to Pin 2 risks internal shorting or parameter shift due to unintended parasitic coupling; the SOT23 footprint must assign Pin 2 as NC with no copper connection on PCB.
How does thermal resistance affect power derating at elevated ambient temperatures?
With Rth(j-a) = 500 K/W, the junction-to-ambient temperature rise is 125 K at full 250 mW dissipation. At Tamb = 100 °C, maximum allowable Ptot drops to 100 mW to keep Tj ≤ 150 °C. Derating curves in Figure 1 of the datasheet confirm linear reduction above 50 °C ambient.
PZU84-C39R 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):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 350 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 27.3 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-C39R FAQ
1.How can I place an order for PZU84-C39R through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-C39R 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-C39R reliable?
The price and inventory of PZU84-C39R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU84-C39R is usually 5 days.
3.What payment methods are accepted for PZU84-C39R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-C39R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-C39R?
PZU84-C39R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-C39R 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-C39R?
For technical support, including PZU84-C39R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-C39R requirements.
6.How does Aetrix verify that PZU84-C39R is sourced from the original manufacturer or authorized distributors?
All PZU84-C39R 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-C39R meets industry standards.
7.What is the process for return or replacement of PZU84-C39R?
All PZU84-C39R units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-C39R, 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-C39R part is unused and in its original packaging.
Return procedure for PZU84-C39R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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