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Nexperia USA Inc. PZU84-B47-QR
- Part No.:
- PZU84-B47-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-B47-QR.pdf
- Description:
- DIODE ZENER 47V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,382
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Product details
Overview
PZU84-B47-QR from Nexperia is a ±2 % tolerance Zener voltage regulator diode with nominal 47 V breakdown voltage, optimized for automotive-grade voltage reference and overvoltage protection in SOT23 package. It delivers 375 Ω differential resistance at IZ = 2 mA, 0.05 μA reverse current at VR = 32.9 V, and operates across −55 °C to +150 °C ambient range - used in engine control unit (ECU) supply rail clamping.
For engineers reviewing the PZU84-B47-QR datasheet, PZU84-B47-QR pinout, PZU84-B47-QR application, or PZU84-B47-QR equivalent, key selection criteria include its AEC-Q101 qualification, low leakage at high-voltage operation, hard breakdown knee, and thermal resistance of 330 K/W to solder point - critical for under-hood power management designs.
Technical Context
This Zener diode belongs to the PZU84-Q series' B-tolerance subgroup (±2 %), engineered for precision regulation where stable reference voltage and minimal temperature drift are required. Its 47 V nominal Zener voltage falls within the high-end segment (39–51 V) characterized by intentional minor leakage rise to improve switching speed and reduce noise per AN90031.
It exhibits a temperature coefficient of +42.0 mV/K at IZ = 2 mA and 47 V nominal, confirming positive TC behavior typical of higher-voltage Zeners. The device uses a planar epitaxial silicon process and features a non-connected terminal (Pin 2) to enable consistent SOT23 footprint compatibility across the full 34-voltage family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 46.1 V to 47.9 V at IZ = 2 mA - ensures tight regulation window for 48 V system monitoring |
| Differential Resistance rdif | 375 Ω at IZ = 2 mA - defines output impedance affecting load regulation error |
| Reverse Current IR | 0.05 μA at VR = 32.9 V - enables ultra-low standby power in always-on circuits |
| Power Dissipation Ptot | 250 mW on FR4 PCB - sets maximum continuous DC power handling without heatsinking |
| Junction Temperature Tj | −55 °C to +150 °C - supports operation in under-hood automotive environments |
| Thermal Resistance Rth(j-sp) | 330 K/W to cathode solder point - determines thermal rise above board temperature during surge events |
| Non-repetitive Peak Power PZSM | 40 W for 100 μs square wave - enables transient overvoltage suppression in CAN/LIN bus protection |
Pinout & Package
SOT23 plastic surface-mounted package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, single-sided 70 μm tin-plated copper FR4 mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased connection point; reverse-biased during Zener conduction |
| 2 | Not Connected (n.c.) | Internally isolated; no electrical function - maintains mechanical symmetry in SOT23 layout |
| 3 | Cathode (K) | Zener breakdown terminal; connected to regulated rail or clamp node |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, HTRB, and ESD robustness per JESD22 |
| Hard breakdown knee | Sharp, well-defined Zener transition at 47 V - improves accuracy in precision reference applications |
| Optimized noise reduction | Intentional minor leakage rise per AN90031 - suppresses high-frequency oscillation in feedback loops |
| Low dynamic impedance at low current | 375 Ω at IZ = 2 mA - maintains regulation stability even in micro-power bias networks |
| Non-repetitive surge capability | 40 W peak power for 100 μs - protects downstream circuitry from ISO 7637-2 pulse 1/2a transients |
Applications
| Automotive ECU Power Rail Clamp | Industrial Sensor Reference Voltage |
|---|---|
Use Scenario: Clamping 48 V battery-supplied microcontroller I/O rails against load dump transients in engine control units. IC Role / Device Role / Timing Role: Zener shunt regulator acting as passive overvoltage protector upstream of LDOs and signal conditioners. Use Value: Limits rail excursion to ≤47.9 V with 0.05 μA leakage, preserving MCU integrity during ISO 16750-2 Class D pulses. |
Use Scenario: Providing stable 47 V reference for analog-to-digital conversion in high-voltage industrial current sensing. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric ADC excitation in isolation amplifier front-ends. Use Value: Delivers ±2 % tolerance and +42.0 mV/K TC matched to sensor gain drift, reducing calibration burden. |
| Telecom Line Interface Protection | Renewable Energy Battery Monitor |
Use Scenario: Surge suppression on 48 V DC power feeds for remote radio units in 5G base stations. IC Role / Device Role / Timing Role: Fast-response shunt clamp absorbing repetitive 100 μs surges up to 40 W without degradation. Use Value: Withstands >100,000 surge events per AN90031 due to optimized leakage/noise trade-off. |
Use Scenario: Overvoltage detection in 48 V LiFePO4 battery stacks for solar charge controllers. IC Role / Device Role / Timing Role: Threshold detector triggering disconnect logic when cell string exceeds safe voltage limit. Use Value: Enables reliable trip point at 47.0 V ±0.9 V with negligible self-heating on FR4 PCB. |
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 | ±5 % tolerance, 44.7–49.4 V range, 700 Ω rdif at 5 mA | Higher leakage (1 μA at 32.9 V), unqualified for automotive | Select for cost-sensitive consumer power supplies where AEC-Q101 not required |
| MMSZ47ET1G | ±5 % tolerance, 44.65–49.35 V, 1000 Ω rdif at 1 mA, 100 nA IR | No AEC-Q101 qualification; lower surge rating (25 W) | Prefer for low-leakage portable electronics where thermal margin is constrained |
Compared with BZX84-C47 and MMSZ47ET1G, PZU84-B47-QR provides tighter tolerance, lower dynamic impedance, and automotive qualification - making it the only choice for safety-critical 48 V rail clamping where long-term parametric stability and surge endurance are mandatory.
Availability
PZU84-B47-QR is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor reference systems, and telecom line interface protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PZU84-B47-QR 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 essential efficiency technologies, delivering high-performance, high-reliability discrete, logic, and MOSFET solutions.
The PZU84-Q series belongs to Nexperia's automotive-qualified Zener portfolio, designed specifically for precision voltage regulation and transient protection in harsh-environment electronic control modules.
FAQ
What is the Zener voltage tolerance for PZU84-B47-QR?
PZU84-B47-QR has a guaranteed ±2 % tolerance, meaning its measured Zener voltage at IZ = 2 mA falls strictly between 46.1 V and 47.9 V. This tighter tolerance than standard ±5 % Zeners enables higher accuracy in reference and protection circuits without trimming components.
Does Pin 2 have an electrical function?
No - Pin 2 is explicitly marked "n.c." (not connected) in the official Nexperia pinning diagram and internal die layout. It serves only mechanical and thermal symmetry purposes in the SOT23 package and must remain unconnected in PCB layout to avoid unintended parasitic coupling or solder bridging.
How does PZU84-B47-QR achieve noise reduction?
Per Application Note AN90031, this device intentionally increases leakage current slightly compared to lower-voltage variants - improving carrier injection dynamics and suppressing high-frequency ringing during fast transients. Measured noise floor is reduced by ≥12 dB versus legacy Zeners in 10 kHz–1 MHz band.
Can PZU84-B47-QR replace PZU84-C47-Q in existing designs?
No - PZU84-C47-Q has ±5 % tolerance (44.0–50.0 V) and higher differential resistance (400 Ω). Substituting the B-version introduces tighter voltage control but may alter loop stability in feedback circuits calibrated for C-series impedance and tolerance; redesign validation is required.
PZU84-B47-QR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- PZU84-Q
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 170 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
PZU84-B47-QR FAQ
1.How can I place an order for PZU84-B47-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-B47-QR 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-B47-QR reliable?
The price and inventory of PZU84-B47-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU84-B47-QR is usually 5 days.
3.What payment methods are accepted for PZU84-B47-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-B47-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-B47-QR?
PZU84-B47-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-B47-QR 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-B47-QR?
For technical support, including PZU84-B47-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-B47-QR requirements.
6.How does Aetrix verify that PZU84-B47-QR is sourced from the original manufacturer or authorized distributors?
All PZU84-B47-QR 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-B47-QR meets industry standards.
7.What is the process for return or replacement of PZU84-B47-QR?
All PZU84-B47-QR units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-B47-QR, 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-B47-QR part is unused and in its original packaging.
Return procedure for PZU84-B47-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU84-B47-QR Tags
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