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Nexperia USA Inc. PZU84-B12R
- Part No.:
- PZU84-B12R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-B12R.pdf
- Description:
- DIODE ZENER 12V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,728
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Product details
Overview
PZU84-B12R from Nexperia is a general-purpose Zener voltage regulator diode in SOT23 package, rated for 12 V nominal breakdown voltage (±2 % tolerance), 250 mW total power dissipation, and 40 W non-repetitive peak reverse power. It delivers hard breakdown knee, low leakage current (<0.1 μA at VR = 9 V), and differential resistance of 80 Ω at IZ = 5 mA - used for precision voltage reference and overvoltage clamping in low-power analog circuits.
For engineers reviewing the PZU84-B12R datasheet, PZU84-B12R pinout, PZU84-B12R application, or PZU84-B12R equivalent, key selection criteria include Zener voltage accuracy, dynamic impedance at low bias current, thermal resistance (Rth(j-a) = 500 K/W), and SOT23 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse-biased avalanche mode to maintain stable reference voltage under varying load and temperature conditions. Its ±2 % tolerance and 80 Ω differential resistance at 5 mA ensure tight regulation in feedback networks and voltage-sense paths.
Designed for low-current regulation (IZ = 0.5–5 mA), it features intentional low leakage (<0.1 μA at VR = 9 V) and a sharp breakdown knee - critical for battery-powered sensor nodes and precision comparator reference rails where quiescent current and noise sensitivity are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12 V nominal, ±2 % tolerance (11.42–12.60 V at IZ = 5 mA) - enables accurate voltage clamping in 12 V rail protection circuits |
| Differential Resistance (rdif) | 80 Ω max at IZ = 5 mA - ensures minimal output voltage shift under small load variations |
| Reverse Leakage (IR) | ≤0.1 μA at VR = 9 V - preserves ultra-low standby current in always-on monitoring circuits |
| Total Power Dissipation (Ptot) | 250 mW at Tamb = 25 °C on FR4 PCB - defines maximum continuous DC power handling in standard layout |
| Non-repetitive Peak Power (PZSM) | 40 W at tp = 100 μs - supports transient surge suppression (e.g., ESD or inductive kickback) |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - allows use as polarity-protected series element in low-voltage signal paths |
| Junction Temperature (Tj) | −55 °C to +150 °C - permits operation in extended industrial environments without derating below −40 °C |
Pinout & Package
Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), optimized for automated placement and reflow soldering per IPC-7351B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node in reverse-bias configuration; forward conduction path when used as clamp or protection diode |
| 2 | Not Connected (n.c.) | Internally unconnected terminal - must remain floating; no PCB trace or thermal pad connection required |
| 3 | Cathode (K) | Connected to higher-potential node in Zener operation; serves as voltage reference output point in shunt regulator topology |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables direct replacement in 12 V reference designs without recalibration or resistor trimming |
| Hard breakdown knee | Provides abrupt transition from blocking to conduction - improves noise immunity and reduces regulation hysteresis |
| Low dynamic impedance (80 Ω @ 5 mA) | Maintains <12 mV output variation across ±1 mA load step - suitable for ADC reference buffers |
| Ultra-low leakage (<0.1 μA @ 9 V) | Minimizes error current in high-impedance voltage dividers and battery-backed real-time clock circuits |
| SOT23 footprint compatibility | Supports 0.6 mm solder land width and 0.5 mm spacing - aligns with standard high-density PCB assembly processes |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Clamp |
|---|---|
|
Use Scenario: Stabilizing reference voltage for 16-bit SAR ADC in temperature transmitter modules operating from 3.3 V supply. IC Role / Device Role / Timing Role: Shunt Zener regulator providing 12 V reference for op-amp gain-setting network and ADC input protection. Use Value: 80 Ω rdif and ±2 % VZ ensure <0.02 % full-scale error contribution; low leakage avoids bias current drift in 10 MΩ input impedance stages. |
Use Scenario: Overvoltage clamping on CC1/CC2 lines during USB-C port negotiation to prevent controller latch-up. IC Role / Device Role / Timing Role: Fast-response reverse-bias clamp limiting line voltage to 12 V during hot-plug transients. Use Value: 40 W PZSM rating absorbs 100 μs surges up to ±24 V; hard knee prevents false detection during PD contract negotiation. |
| IoT Node Battery Monitoring | Programmable Logic Controller Input Protection |
|
Use Scenario: Scaling and protecting lithium-ion cell voltage measurement in BLE-enabled asset trackers. IC Role / Device Role / Timing Role: Precision voltage divider top element with 12 V Zener reference for ratiometric ADC scaling. Use Value: ≤0.1 μA IR eliminates measurable discharge during 10-second sleep cycles; SOT23 size fits 2-layer tracker PCB constraints. |
Use Scenario: Input stage protection for 24 V digital input modules subjected to field wiring transients. IC Role / Device Role / Timing Role: Primary shunt clamp before TVS diode, absorbing repetitive 10–100 ms overvoltages up to 30 V. Use Value: 250 mW Ptot supports continuous 12 V regulation at 20 mA; Rth(j-a) = 500 K/W enables operation at 85 °C ambient without heatsink. |
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-C12 | Same 12 V ±5 % tolerance, 300 mW Ptot, but higher rdif (≥100 Ω) and IR (≤100 nA @ 9 V) | Acceptable for non-critical biasing; unsuitable for precision references requiring <0.1 μA leakage | Select when cost priority outweighs regulation accuracy and leakage performance |
| MMSZ4687 | 12 V ±5 %, 500 mW Ptot, rdif = 100 Ω @ 20 mA, IR = 100 nA @ 9 V, larger SOD-123 package | Better power handling but larger footprint; lacks hard knee and low-leakage optimization | Choose only if board space allows SOD-123 and thermal margin exceeds 250 mW requirement |
Compared with BZX84-C12 and MMSZ4687, PZU84-B12R provides tighter voltage tolerance, lower dynamic impedance, and significantly lower leakage - making it optimal for precision analog sensing and low-power always-on systems where regulation stability and quiescent current dominate selection criteria.
Availability
PZU84-B12R is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB-C interface protection, IoT battery monitoring, and PLC input stage regulation requiring stable component supply across long-lifecycle embedded programs.
Supply support for PZU84-B12R 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, with leadership in automotive-qualified and industrial-grade components.
The PZU84 series belongs to Nexperia's general-purpose Zener regulator product line, engineered specifically for stable voltage reference and overvoltage clamping in space-constrained, low-power analog and mixed-signal applications.
FAQ
What is the guaranteed Zener voltage range for PZU84-B12R at 5 mA test current?
The guaranteed Zener voltage range is 11.42 V to 12.60 V at IZ = 5 mA and Tj = 25 °C, per the ±2 % tolerance specification in Table 8 of the datasheet. This range remains valid across the full operating junction temperature range (−55 °C to +150 °C), with temperature coefficient of +6.0 mV/K typical at this voltage level.
Can PZU84-B12R be used in forward-bias mode as a standard silicon diode?
Yes - its forward voltage is specified as ≤0.9 V at IF = 10 mA, making it usable as a low-drop rectifier or polarity protection element. However, it is not optimized for high forward current; absolute maximum IF is 200 mA, and continuous forward dissipation must stay within the 250 mW Ptot limit under thermal constraints.
How does the "n.c." pin (Pin 2) affect PCB layout and thermal design?
Pin 2 is internally unconnected and must remain electrically floating - no trace, pad, or thermal relief should connect to it. Leaving it unconnected avoids parasitic coupling and ensures specified Rth(j-sp) = 330 K/W (measured at cathode tab) remains valid. Standard SOT23 reflow footprints accommodate this by omitting solder mask opening on Pin 2.
Is PZU84-B12R qualified for automotive applications?
No - the datasheet explicitly states this device is not automotive-qualified. It has not undergone AEC-Q101 stress testing or been characterized for automotive temperature ranges (−40 °C to +125 °C ambient). For automotive use, Nexperia offers the PZU12B2 series, which is AEC-Q101 qualified and specified for 12 V Zener regulation in vehicle ECUs.
PZU84-B12R 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):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 100 mV
- 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-B12R FAQ
1.How can I place an order for PZU84-B12R through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-B12R 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-B12R reliable?
The price and inventory of PZU84-B12R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU84-B12R is usually 5 days.
3.What payment methods are accepted for PZU84-B12R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-B12R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-B12R?
PZU84-B12R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-B12R 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-B12R?
For technical support, including PZU84-B12R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-B12R requirements.
6.How does Aetrix verify that PZU84-B12R is sourced from the original manufacturer or authorized distributors?
All PZU84-B12R 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-B12R meets industry standards.
7.What is the process for return or replacement of PZU84-B12R?
All PZU84-B12R units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-B12R, 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-B12R part is unused and in its original packaging.
Return procedure for PZU84-B12R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU84-B12R Tags
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