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Nexperia USA Inc. PZU47B2AX
- Part No.:
- PZU47B2AX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
PZU47B2AX.pdf
- Description:
- PZU47B2A/SOD323/SOD2
- Quantity:
- Payment:
- Shipping:
Inventory:2,675
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Product details
Overview
PZU47B2AX from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 47 V nominal working voltage, 320 mW total power dissipation at 25 °C ambient, and 40 W non-repetitive peak reverse power. It delivers low dynamic impedance (375 Ω max at IZ = 2 mA), 170 nA reverse current at 0.5 mA test current, and temperature coefficient of +0.5 mV/K - used for precision voltage reference and overvoltage clamping in DC power rails.
For engineers reviewing the PZU47B2AX datasheet, PZU47B2AX pinout, PZU47B2AX application, or PZU47B2AX equivalent, this page provides verified Zener parameters, cathode/anode terminal mapping, thermal resistance data (255 K/W junction-to-solder-point), and validated alternatives for 47 V ±2 % regulation in space-constrained SMD designs.
Technical Context
This Zener diode operates in reverse breakdown mode with hard knee characteristics optimized for stable voltage reference under low-current conditions (IZ = 2 mA). Its differential resistance (rdif ≤ 375 Ω) and tight ±2 % tolerance ensure minimal output drift across production lots.
The device exhibits intentional minor leakage rise per AN90031 to reduce switching noise and improve transient response in clamping applications. Thermal resistance from junction to solder point is 255 K/W on FR4 PCB with 1 cm² cathode pad, supporting reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 47 V - precise regulation point for 48 V rail monitoring and protection circuits |
| Tolerance | ±2 % - B2 series ensures tighter voltage binning than standard ±5 % parts |
| Total Power Dissipation | 320 mW at Tamb ≤ 25 °C - defines continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Reverse Power | 40 W - supports surge suppression for transient events up to 100 µs duration |
| Differential Resistance | ≤375 Ω at IZ = 2 mA - low impedance maintains regulation accuracy under load variation |
| Reverse Current | 170 nA at IZ = 0.5 mA - ultra-low leakage preserves battery life in always-on sensing nodes |
| Temperature Coefficient | +0.5 mV/K - near-zero TC enables stable reference across industrial temperature range |
Pinout & Package
SOD323 (SC-76) surface-mount plastic 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 voltage node; marking bar identifies this terminal |
| 2 | Anode | Connected to ground or lower-potential rail; reverse-biased during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % voltage tolerance (B2 series) | Enables high-accuracy voltage reference without post-production trimming |
| Low dynamic impedance (≤375 Ω) | Maintains regulation stability under varying load currents in feedback loops |
| Optimized leakage for noise reduction | Intentional minor IR rise improves fast-switching behavior per AN90031 |
| Small SOD323 footprint | Supports high-density PCB layouts in portable and IoT endpoint designs |
| 150 °C maximum junction temperature | Allows operation in thermally demanding environments like automotive under-hood modules |
Applications
| Power Supply Rail Clamping | ADC Reference Stabilization |
|---|---|
Use Scenario: Protecting 48 V DC input stage against ESD and load dump transients in industrial controllers. IC Role / Device Role / Timing Role: Zener clamp placed between rail and ground to shunt excess energy above 47 V threshold. Use Value: 40 W non-repetitive surge rating absorbs 100 µs transients without degradation; ±2 % tolerance ensures predictable clamping level. |
Use Scenario: Providing stable 47 V reference for 16-bit SAR ADC biasing in precision measurement front-ends. IC Role / Device Role / Timing Role: Low-noise Zener source feeding resistive divider to generate scaled reference voltage. Use Value: +0.5 mV/K temperature coefficient minimizes drift across –40 to +125 °C; 170 nA leakage avoids loading error in high-impedance dividers. |
| Overvoltage Detection Circuit | Battery Management System (BMS) Cell Monitoring |
Use Scenario: Detecting overvoltage condition in 4S LiFePO₄ battery packs (nominal 12.8 V, max 16.8 V per string). IC Role / Device Role / Timing Role: Zener-based comparator threshold set at 47 V to trigger shutdown when 3×16.8 V strings exceed safe limit. Use Value: Hard breakdown knee ensures sharp turn-on; 375 Ω rdif guarantees consistent trip point across temperature and aging. |
Use Scenario: Monitoring individual cell voltage in 12-cell lithium-ion stack (max 50.4 V) using discrete Zener-based analog front-end. IC Role / Device Role / Timing Role: Precision 47 V reference for differential amplifier gain calibration in isolated cell voltage sensing. Use Value: Tight ±2 % tolerance eliminates need for per-unit calibration; SOD323 size allows placement adjacent to sense ICs on compact BMS PCBs. |
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-C47 | ±5 % tolerance, 300 mW Ptot, higher rdif (700 Ω), no B2-series low-leakage optimization | Acceptable for non-critical clamping but unsuitable for precision reference due to looser tolerance and higher impedance | Select only if cost sensitivity outweighs accuracy requirements and thermal margin is sufficient |
| MMSZ47ET1G | ±5 % tolerance, 500 mW Ptot, 350 Ω rdif, TO-236AB package (larger than SOD323) | Higher power handling supports longer surges but larger footprint conflicts with ultra-dense layouts | Prefer when board space permits and 500 mW continuous dissipation is required over 320 mW |
Compared with BZX84-C47 and MMSZ47ET1G, PZU47B2AX offers superior voltage accuracy (±2 % vs ±5 %), lower thermal resistance (255 K/W vs ≥300 K/W), and smaller SOD323 footprint - making it optimal for space-constrained, high-precision 47 V regulation where leakage and noise matter.
Availability
PZU47B2AX is available at Aetrix Electronics and suitable for industrial power supplies, precision instrumentation, battery management systems, and automotive body electronics requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for PZU47B2AX 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 logic, discrete, and MOSFET devices, headquartered in Nijmegen, Netherlands.
The PZUxBA series belongs to Nexperia's general-purpose Zener regulator portfolio, designed specifically for compact, high-accuracy voltage reference and clamping in consumer, industrial, and automotive-qualified (where specified) applications.
FAQ
What is the maximum continuous reverse current the PZU47B2AX can sustain at 25 °C ambient?
The device has no specified continuous reverse current rating; its steady-state operation is governed by total power dissipation (320 mW at Tamb ≤ 25 °C). At 47 V Zener voltage, this corresponds to ~6.8 mA average reverse current on FR4 PCB with standard footprint. Exceeding this requires derating per thermal resistance curves in the datasheet.
Does the PZU47B2AX meet automotive AEC-Q200 requirements?
No - the PZU47B2AX is not AEC-Q200 qualified. The datasheet explicitly states "non-automotive qualified products" and does not list automotive qualification status. For automotive use, consult Nexperia's AEC-Q200-certified Zener families such as the PZUxHBA series.
How does the B2 tolerance series differ from B1 and B3 in the PZUxBA family?
B2 denotes ±2 % tolerance with center binning between B1 (tighter ±2 %, narrower min/max spread) and B3 (±2 %, wider spread). For PZU47B2AX, VZ is guaranteed 46.10–47.90 V at IZ = 2 mA, whereas B1 would be 46.55–47.45 V and B3 46.10–47.90 V with different statistical distribution - all meeting ±2 % but differing in yield and binning granularity.
Can the PZU47B2AX be used in parallel for higher power handling?
No - Zener diodes must not be paralleled without individual ballast resistors due to mismatched VZ and thermal runaway risk. Even with matched units, the 47 V tolerance spread (±2 %) and differing rdif values cause current imbalance. For higher power, select a single higher-rated Zener or use active regulation instead.
PZU47B2AX 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:
- -
PZU47B2AX FAQ
1.How can I place an order for PZU47B2AX through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU47B2AX 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 PZU47B2AX reliable?
The price and inventory of PZU47B2AX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU47B2AX is usually 5 days.
3.What payment methods are accepted for PZU47B2AX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU47B2AX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU47B2AX?
PZU47B2AX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU47B2AX 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 PZU47B2AX?
For technical support, including PZU47B2AX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU47B2AX requirements.
6.How does Aetrix verify that PZU47B2AX is sourced from the original manufacturer or authorized distributors?
All PZU47B2AX 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 PZU47B2AX meets industry standards.
7.What is the process for return or replacement of PZU47B2AX?
All PZU47B2AX units undergo pre-shipment inspection (PSI). If there is an issue with PZU47B2AX, 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 PZU47B2AX part is unused and in its original packaging.
Return procedure for PZU47B2AX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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