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Nexperia USA Inc. PZU47BAX
- Part No.:
- PZU47BAX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
PZU47BAX.pdf
- Description:
- PZU47BA/SOD323/SOD2
- Quantity:
- Payment:
- Shipping:
Inventory:5,147
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Product details
Overview
PZU47BAX from Nexperia is a general-purpose Zener voltage regulator diode in SOD323 (SC-76) surface-mount package, rated for 47 V nominal working voltage with ±5 % tolerance (B series), 320 mW total power dissipation at 25 °C ambient, and non-repetitive peak reverse power dissipation up to 40 W. It delivers stable voltage reference in low-power supply rails and protection circuits.
For engineers reviewing the PZU47BAX datasheet, PZU47BAX pinout, PZU47BAX application, or PZU47BAX equivalent, key selection criteria include its 47 V Zener voltage with hard breakdown knee, low leakage current (≤170 nA at IZ = 0.5 mA), differential resistance of ≤375 Ω at 2 mA, temperature coefficient of +0.5 mV/K, and suitability for compact voltage clamping in space-constrained PCB layouts.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain a stable reference voltage across its terminals under varying load and input conditions. Its design emphasizes low dynamic impedance and predictable temperature behavior-critical for precision regulation in analog sensing and power rail supervision.
The device features intentional minor leakage current rise optimized for fast switching and noise reduction per AN90031, and exhibits a typical junction-to-ambient thermal resistance of 390 K/W on FR4 PCB with standard footprint-enabling reliable operation within its 150 °C maximum junction temperature limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V nominal, ±5 % tolerance (B series); ensures stable clamping at system overvoltage thresholds |
| Total Power Dissipation (Ptot) | 320 mW at Tamb ≤ 25 °C on FR4 PCB; defines continuous DC power handling in standard layout |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for tp = 100 µs square wave; supports transient surge suppression without failure |
| Differential Resistance (rdif) | ≤375 Ω at IZ = 2 mA; maintains tight voltage regulation under small-signal load variations |
| Reverse Current (IR) | ≤170 nA at VR = 36.4 V (0.77 × VZ); minimizes standby power loss in high-impedance bias networks |
| Temperature Coefficient (SZ) | +0.5 mV/K at VZ = 47 V; enables predictable drift compensation in wide-temperature environments |
| Junction Temperature (Tj) | Max 150 °C; allows operation in industrial-grade ambient conditions up to +125 °C with derating |
Pinout & Package
SOD323 (SC-76) plastic surface-mount package: 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output node; polarity marking bar aligns with this terminal |
| 2 | Anode | Connected to ground or lower-potential reference; completes reverse-bias conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Low-leakage Zener operation | IR ≤ 170 nA at VR = 36.4 V enables microamp-level standby current in battery-powered monitors |
| Hard breakdown knee | Sharp transition into conduction improves voltage threshold accuracy in overvoltage detection |
| Optimized switching & noise performance | Intentional minor leakage rise per AN90031 reduces ringing and EMI in fast-switching clamp circuits |
| Thermal robustness | Rth(j-a) = 390 K/W on standard FR4 ensures stable VZ under sustained 320 mW dissipation |
Applications
| Power Supply Rail Clamping | Reference Voltage Generation |
|---|---|
|
Use Scenario: Protecting 48 V telecom line interface ICs from transient surges exceeding 50 V. IC Role / Device Role / Timing Role: Zener diode acts as shunt overvoltage clamp, diverting excess energy to ground before downstream components are stressed. Use Value: 47 V nominal rating provides 6 % margin above nominal 48 V rail while maintaining low rdif for rapid response. |
Use Scenario: Providing stable 47 V reference for ADC input scaling in industrial sensor signal conditioning. IC Role / Device Role / Timing Role: Passive voltage reference source establishing known full-scale input for 16-bit analog-to-digital conversion. Use Value: ±5 % tolerance and +0.5 mV/K TC enable <1 % total error over –40 °C to +85 °C without active compensation. |
| ESD Protection Network | DC Bias Stabilization |
|
Use Scenario: Secondary clamping stage in multi-stage ESD protection for USB-C power delivery lines. IC Role / Device Role / Timing Role: Fast-reacting Zener absorbing residual transients after TVS primary stage, limiting voltage to safe levels for PMIC inputs. Use Value: 40 W non-repetitive peak power rating handles IEC 61000-4-2 contact discharge events without degradation. |
Use Scenario: Setting precise bias point for high-gain op-amp feedback networks in precision instrumentation amplifiers. IC Role / Device Role / Timing Role: Provides fixed DC offset voltage independent of supply variation, improving common-mode rejection ratio stability. Use Value: Low 170 nA reverse current prevents loading of high-impedance bias nodes, preserving amplifier gain accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B47 | Same 47 V/±5 % rating but SOD323 package with higher Ptot = 300 mW (Nexperia spec); slightly higher rdif (≤400 Ω) | Marginally less stable under dynamic load due to higher impedance; identical thermal profile | Preferred when sourcing consistency with legacy BZX384 footprint is required |
| MMSZ47ET1G | 47 V/±5 %, SOD-123 package (larger), Ptot = 500 mW, rdif = ≤350 Ω, IR = ≤100 nA at 37.6 V | Higher power handling supports longer-duration transients; larger footprint limits ultra-dense routing | Chosen when board layout allows larger package and higher continuous dissipation is needed |
Compared with PZU47BAX, BZX384-B47 offers identical specification but older qualification status, while MMSZ47ET1G trades miniaturization for higher power and lower leakage-making PZU47BAX optimal for space-constrained, low-quiescent-current 47 V regulation where SOD323 size and AN90031 noise optimization are critical.
Availability
PZU47BAX is available at Aetrix Electronics and suitable for power supply rail clamping, reference voltage generation, ESD protection networks, and DC bias stabilization requiring stable component supply across industrial, telecom, and instrumentation designs.
Supply support for PZU47BAX 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 logic, discrete, and MOSFET devices with focus on efficiency, reliability, and miniaturization for consumer, industrial, and automotive markets.
PZUxBA series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered for compact, low-power voltage reference and clamping in space-constrained surface-mount applications-emphasizing tight tolerance, low leakage, and optimized noise behavior.
FAQ
What is the maximum continuous reverse voltage that PZU47BAX can regulate without exceeding its power limit?
At 25 °C ambient on a standard FR4 PCB, PZU47BAX sustains 47 V regulation with ≤320 mW dissipation, corresponding to a maximum continuous reverse current of ~6.8 mA (320 mW ÷ 47 V). Derating applies above 25 °C per its 390 K/W thermal resistance.
How does the +0.5 mV/K temperature coefficient affect voltage accuracy over industrial temperature range?
From –40 °C to +85 °C (ΔT = 125 K), the coefficient contributes ±62.5 mV drift (125 × 0.5 mV/K), or ±0.13 % of 47 V. Combined with ±5 % initial tolerance, total worst-case deviation is ±5.13 %-suitable for non-critical regulation where active compensation isn't used.
Can PZU47BAX be used in parallel for higher power handling?
No-Zener diodes exhibit negative temperature coefficient mismatch; paralleling causes current hogging and thermal runaway. For higher power, use a single higher-rated device like MMSZ47ET1G or add external series resistance to balance current sharing.
Is PZU47BAX suitable for automotive applications?
No-this device is not AEC-Q200 qualified. Nexperia explicitly states non-automotive qualification in its legal disclaimers. For automotive use, select an AEC-Q200–qualified Zener such as PZU47BAH (automotive grade variant) or equivalent qualified alternatives.
PZU47BAX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
PZU47BAX FAQ
1.How can I place an order for PZU47BAX through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU47BAX 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 PZU47BAX reliable?
The price and inventory of PZU47BAX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU47BAX is usually 5 days.
3.What payment methods are accepted for PZU47BAX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU47BAX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU47BAX?
PZU47BAX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU47BAX 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 PZU47BAX?
For technical support, including PZU47BAX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU47BAX requirements.
6.How does Aetrix verify that PZU47BAX is sourced from the original manufacturer or authorized distributors?
All PZU47BAX 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 PZU47BAX meets industry standards.
7.What is the process for return or replacement of PZU47BAX?
All PZU47BAX units undergo pre-shipment inspection (PSI). If there is an issue with PZU47BAX, 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 PZU47BAX part is unused and in its original packaging.
Return procedure for PZU47BAX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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