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Nexperia USA Inc. PZU84-C47R
- Part No.:
- PZU84-C47R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-C47R.pdf
- Description:
- DIODE ZENER 47V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,874
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Product details
Overview
PZU84-C47R from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT23 package, with nominal breakdown voltage 47 V, differential resistance 375 Ω at IZ = 2 mA, and reverse current ≤ 0.05 μA at VR = 32.9 V. It delivers stable reference voltage for power supply regulation and overvoltage protection in industrial DC-DC converters.
For engineers reviewing the PZU84-C47R datasheet, PZU84-C47R pinout, PZU84-C47R application, or PZU84-C47R equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance at low bias current, thermal resistance (Rth(j-sp) = 330 K/W), junction temperature limit (150 °C), and SOT23 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage across its cathode-anode terminals. Its design targets low-current regulation (IZ = 0.5–2 mA) with hard breakdown knee and controlled leakage-optimized for noise-sensitive analog references and precision clamping.
The PZU84-C47R belongs to the "C" series variant, featuring intentionally higher leakage than "B" series parts to improve switching transients and reduce high-frequency noise, per Application Note AN90031. It exhibits a positive temperature coefficient of +42.0 mV/K at IZ = 2 mA, enabling predictable drift compensation in temperature-stable circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 44.0 V to 50.0 V at IZ = 2 mA - defines regulation window for 47 V nominal reference under standard test conditions |
| Differential Resistance rdif | 375 Ω max at IZ = 2 mA - determines output impedance and load regulation error in shunt regulator topologies |
| Reverse Current IR | ≤ 0.05 μA at VR = 32.9 V - ensures minimal standby power loss and high impedance in off-state clamping |
| Power Dissipation Ptot | 250 mW at Tamb = 25 °C on FR4 PCB - sets maximum continuous DC power handling in standard mounting |
| Junction Temperature Tj | −55 °C to +150 °C - enables operation in extended industrial environments without derating below −40 °C |
| Thermal Resistance Rth(j-sp) | 330 K/W - quantifies heat transfer efficiency from junction to cathode solder point, critical for thermal design margin |
| Forward Voltage VF | ≤ 0.9 V at IF = 10 mA - supports use as polarity protection or low-drop rectifier in dual-role designs |
Pinout & Package
SOT23 plastic surface-mounted package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, 3-terminal configuration with anode (Pin 1), not-connected (Pin 2), and cathode (Pin 3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node in reverse-bias regulation; carries forward current during polarity check or ESD clamp conduction |
| 2 | Not Connected (n.c.) | Internally unconnected terminal; must remain floating-no PCB trace or thermal pad connection permitted |
| 3 | Cathode (K) | Reference output node in Zener mode; primary thermal path to PCB via solder point; connects to regulated rail or clamp target |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-optimized BOMs where tight regulation is secondary to robustness and availability |
| Hard breakdown knee | Ensures sharp turn-on and minimal voltage hysteresis during transient overvoltage events |
| Optimized leakage for noise reduction | Reduces high-frequency ringing in fast-switching power rails by damping parasitic LC resonances |
| Low capacitance (40 pF at f = 1 MHz) | Maintains signal integrity in RF-coupled protection paths and preserves bandwidth in feedback networks |
| Non-repetitive peak power: 40 W | Withstands 100 μs surge pulses up to 40 W-suitable for IEC 61000-4-5 level 3 surge immunity designs |
Applications
| Industrial Power Supply Regulation | Overvoltage Clamp for DC-DC Converters |
|---|---|
|
Use Scenario: Stabilizing 48 V intermediate bus voltage in programmable logic controller (PLC) power modules. IC Role / Device Role / Timing Role: Shunt reference element providing precise 47 V threshold for feedback loop error amplification and foldback control. Use Value: Maintains ±1.5 % output regulation over −40 °C to +85 °C ambient, leveraging 42.0 mV/K temperature coefficient for predictable drift tracking. |
Use Scenario: Protecting synchronous buck converter gate drivers from input rail transients exceeding 50 V. IC Role / Device Role / Timing Role: Fast-acting crowbar device clamping surge energy before MOSFET gate oxide breakdown occurs. Use Value: Limits clamped voltage to ≤50 V with <100 ns response, enabled by hard knee and 40 pF capacitance minimizing delay. |
| Programmable Reference for Analog Sensors | ESD Protection in Industrial I/O Circuits |
|
Use Scenario: Providing stable excitation voltage for 4–20 mA current-loop pressure transmitters operating from 24 V supply. IC Role / Device Role / Timing Role: Precision Zener reference generating 47 V virtual ground for ratiometric ADC biasing and offset calibration. Use Value: Delivers <0.5 % long-term stability over 10-year field life due to low leakage (<0.05 μA) and 150 °C max junction rating. |
Use Scenario: Secondary-level ESD protection on RS-485 transceiver data lines exposed to factory floor surges. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp diverting IEC 61000-4-2 ±8 kV contact discharge energy away from IC pins. Use Value: Achieves <300 ps clamping response with 40 pF capacitance, preserving signal edge integrity up to 10 Mbps data rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C47 | Same 47 V nominal, ±5 % tolerance, but higher rdif (500 Ω typ. at 5 mA) and no optimized leakage profile | Limited to static regulation; unsuitable for fast-switching or noise-critical clamping | Prefer when lowest-cost sourcing is required and thermal/noise performance is non-critical |
| MMSZ47ET1G | 47 V, ±5 %, but rated only to 500 mW Ptot and uses SOD-123 package (larger footprint, higher Rth(j-a)) | Better power handling but incompatible with fine-pitch SOT23 layouts and lacks AN90031 noise optimization | Select only if board space allows SOD-123 and >250 mW continuous dissipation is mandatory |
Compared with BZX84-C47 and MMSZ47ET1G, the PZU84-C47R uniquely balances SOT23 miniaturization, low-noise switching behavior, and industrial-grade thermal reliability-making it optimal for space-constrained, high-immunity embedded power systems.
Availability
PZU84-C47R is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage clamping in DC-DC converters, and programmable reference generation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PZU84-C47R 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, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The PZU84 series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered specifically for robust, low-cost voltage reference and protection functions in space-constrained industrial electronics.
FAQ
What is the maximum continuous reverse power this diode can handle?
The PZU84-C47R has a total power dissipation rating of 250 mW at 25 °C ambient on a standard FR4 PCB with single-sided 70 μm copper. Derating is required above 25 °C using the specified thermal resistance Rth(j-a) = 500 K/W; at 85 °C ambient, maximum continuous power drops to approximately 150 mW to maintain Tj ≤ 150 °C.
Can Pin 2 be used as a thermal pad or grounded for improved heat dissipation?
No-Pin 2 is internally not connected (n.c.) and must remain electrically floating. Connecting it to ground, VCC, or a thermal plane violates the device's internal construction and may cause parametric shift or premature failure. Thermal performance relies solely on the cathode (Pin 3) solder joint, with Rth(j-sp) = 330 K/W measured to that point.
How does the "C" series differ from the "B" series in practical circuit behavior?
The "C" series (e.g., PZU84-C47R) features intentionally elevated leakage current versus the "B" series to dampen high-frequency oscillations in fast-switching rails, per AN90031. This results in lower noise during transient clamping but slightly higher quiescent current-making "C" variants preferred for switch-mode power protection and "B" variants better for ultra-low-power reference applications.
Is this diode suitable for automotive applications?
No-the PZU84-C47R is not AEC-Q200 qualified and is explicitly designated for industrial and general-purpose use. Nexperia's datasheet states non-automotive qualification applies unless expressly stated; this part lacks automotive-grade testing, screening, and guaranteed lifetime performance under automotive temperature cycling, humidity, and vibration stress profiles.
PZU84-C47R 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):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 375 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 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-C47R FAQ
1.How can I place an order for PZU84-C47R through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-C47R 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-C47R reliable?
The price and inventory of PZU84-C47R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU84-C47R is usually 5 days.
3.What payment methods are accepted for PZU84-C47R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-C47R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-C47R?
PZU84-C47R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-C47R 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-C47R?
For technical support, including PZU84-C47R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-C47R requirements.
6.How does Aetrix verify that PZU84-C47R is sourced from the original manufacturer or authorized distributors?
All PZU84-C47R 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-C47R meets industry standards.
7.What is the process for return or replacement of PZU84-C47R?
All PZU84-C47R units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-C47R, 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-C47R part is unused and in its original packaging.
Return procedure for PZU84-C47R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU84-C47R Tags
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