My Inquiry
My Account
Nexperia USA Inc. PZU84-B11R
- Part No.:
- PZU84-B11R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-B11R.pdf
- Description:
- DIODE ZENER 11V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,928
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PZU84-B11R from Nexperia is a general-purpose Zener voltage regulator diode in SOT23 package, providing precise 11 V nominal regulation at 5 mA with ±2 % tolerance, 60 Ω differential resistance, and 8 mV/K temperature coefficient - used for low-power voltage reference and overvoltage clamping in power supply feedback loops.
For engineers reviewing the PZU84-B11R datasheet, PZU84-B11R pinout, PZU84-B11R application, or PZU84-B11R equivalent, this device serves as a stable, low-leakage (≤0.1 μA at VR = 8.8 V), fast-switching Zener for precision biasing, ESD protection interface clamping, and analog circuit reference stabilization under ambient temperatures from −55 °C to +150 °C.
Technical Context
The PZU84-B11R operates in reverse breakdown mode with hard knee characteristics optimized for low-current regulation (IZ = 0.5 mA to 5 mA), delivering stable 11 V output despite input variations. Its design targets minimal dynamic impedance and intentional leakage control per AN90031 for noise-sensitive analog stages.
Thermal performance is defined by Rth(j-a) = 500 K/W (free air) and Rth(j-sp) = 330 K/W (solder point), enabling reliable operation up to 150 °C junction temperature. The device complies with IEC 60134 absolute maximum ratings, including 40 W non-repetitive peak reverse power for 100 μs pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 11 V at IZ = 5 mA - defines regulated output level for feedback and reference circuits |
| Tolerance | ±2 % - ensures tight voltage accuracy critical for precision analog sensing and ADC reference |
| Differential Resistance | 60 Ω max at IZ = 5 mA - determines regulation stiffness against load current changes |
| Reverse Leakage Current | ≤0.1 μA at VR = 8.8 V - minimizes quiescent power loss in high-impedance bias networks |
| Power Dissipation | 250 mW at Tamb = 25 °C - sets continuous DC power limit on standard FR4 PCB |
| Junction Temperature | −55 °C to +150 °C - supports industrial and automotive under-hood environments |
| Package | SOT23 - surface-mount footprint (2.9 mm × 1.3 mm × 1 mm) compatible with automated assembly |
Pinout & Package
SOT23 plastic surface-mounted package with 1.9 mm pin pitch, 2.9 mm × 1.3 mm × 1 mm body dimensions, and tin-plated terminals per JEDEC MO-215.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Anode connection | Connected to lower-potential node in reverse-biased configuration; carries forward current during transient conduction |
| 2 (n.c.) | Not connected | Internally unconnected terminal - must remain floating; no PCB trace or thermal pad required |
| 3 (Cathode) | Cathode connection | Connected to higher-potential node; serves as voltage reference output and primary heat path to solder point |
Key Features
| Feature | Design Value |
|---|---|
| Hard breakdown knee | Enables sharp, predictable turn-on at 11 V for accurate clamping without soft saturation |
| Low dynamic impedance | 60 Ω max improves regulation stability across 0.5–5 mA operating range |
| Optimized leakage profile | Intentional minor leakage rise reduces switching noise in feedback paths per AN90031 |
| Wide operating temperature | −55 °C to +150 °C rating supports deployment in harsh industrial and automotive ambient conditions |
| E24 voltage coverage | Part of 34-value series spanning 2.4 V–51 V, enabling exact match to common reference requirements |
Applications
| Power Supply Feedback Reference | ESD Protection Clamping |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or buck converter feedback loop via optocoupler-coupled TL431 replacement. IC Role / Device Role / Timing Role: Zener diode provides fixed 11 V reference to error amplifier input, defining regulation setpoint. Use Value: ±2 % tolerance and 60 Ω rdif ensure <±1.5 % output variation across line/load/temperature, meeting Class II power supply specs. |
Use Scenario: Protecting RS-485 transceiver I/O pins from ±8 kV contact ESD per IEC 61000-4-2. IC Role / Device Role / Timing Role: Placed between bus line and ground to clamp transients above 11 V while remaining inactive during normal 0–5 V signaling. Use Value: Hard knee and ≤0.1 μA leakage prevent signal distortion during idle state and ensure sub-10 ns response to ESD events. |
| Analog Sensor Biasing | Microcontroller Reset Threshold |
Use Scenario: Generating stable 11 V bias for op-amp rail-to-rail input stage powering MEMS pressure sensor signal conditioning. IC Role / Device Role / Timing Role: Supplies regulated excitation voltage to sensor bridge and reference to ADC input buffer. Use Value: 8 mV/K temperature coefficient limits drift to ±0.44 V over −40 °C to +85 °C, preserving 12-bit measurement accuracy. |
Use Scenario: Setting brown-out detection threshold for STM32F4 microcontroller reset circuit using external comparator. IC Role / Device Role / Timing Role: Provides 11 V reference to comparator non-inverting input; system resets when VDD drops below 11 V × R1/(R1+R2). Use Value: Tight ±2 % tolerance enables repeatable 2.75 V reset point (with 1:4 divider), eliminating false resets during voltage ripple. |
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-C11 | ±5 % tolerance, 100 Ω rdif at 5 mA, 0.5 μA IR at VR = 8.8 V | Higher regulation error and leakage reduce suitability for precision references | Select when cost sensitivity outweighs accuracy needs and leakage budget allows ≥0.5 μA |
| MMSZ5240B | ±5 % tolerance, 20 Ω rdif at 20 mA, but rated only to 500 mW peak (not 40 W surge) | Lacks non-repetitive 40 W pulse capability needed for transient suppression | Prefer for continuous regulation only; avoid where IEC 61000-4-5 surge immunity is required |
Compared with BZX84-C11 and MMSZ5240B, PZU84-B11R delivers tighter tolerance, lower leakage, and superior surge robustness - making it optimal for high-accuracy references and ESD-clamped interfaces where long-term stability and transient resilience are jointly critical.
Availability
PZU84-B11R is available at Aetrix Electronics and suitable for power supply feedback reference, ESD protection clamping, analog sensor biasing, and microcontroller reset threshold applications requiring stable component supply across industrial, instrumentation, and communications designs.
Supply support for PZU84-B11R 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, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
PZU84-B11R belongs to the PZU84 series of general-purpose Zener diodes engineered for precision voltage regulation and clamping in space-constrained SMT applications, emphasizing low leakage, hard breakdown, and thermal robustness.
FAQ
What is the maximum continuous reverse current the PZU84-B11R can sustain at 25 °C?
The PZU84-B11R supports a maximum continuous forward current of 200 mA per Absolute Maximum Ratings, but its Zener operation is specified at test currents up to 5 mA for regulation. At 11 V, sustained reverse current beyond 22.7 mA exceeds the 250 mW power limit (P = V × I), so practical continuous Zener current is capped at ≈22 mA to avoid thermal runaway on standard FR4 PCB.
Does the n.c. pin (pin 2) require grounding or thermal relief on the PCB?
No - pin 2 is internally not connected and must remain electrically floating. Nexperia's SOT23 footprint guidelines (Fig. 10–11) specify no solder land or thermal pad for pin 2; adding copper there risks solder bridging or mechanical stress without electrical benefit.
How does the temperature coefficient of ±8 mV/K affect regulation accuracy over temperature?
At 11 V nominal, an 8 mV/K coefficient causes ≈±0.88 V shift over a 110 K range (−40 °C to +70 °C), contributing ±8 % drift alone. Combined with ±2 % initial tolerance, total worst-case deviation reaches ±10 % - thus PZU84-B11R is best applied where secondary compensation or narrow ambient range mitigates thermal drift.
Can PZU84-B11R replace a 1N4740A in existing designs?
Yes, with caveats: both are 10 V Zeners, but PZU84-B11R is 11 V ±2 % (10.78–11.22 V) versus 1N4740A's 10 V ±5 % (9.5–10.5 V). Electrical substitution requires verifying circuit margin for the 0.78 V higher nominal voltage and confirming SOT23 footprint compatibility with existing layout and thermal design.
PZU84-B11R 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):
- 11 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-B11R FAQ
1.How can I place an order for PZU84-B11R through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-B11R 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-B11R reliable?
The price and inventory of PZU84-B11R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU84-B11R is usually 5 days.
3.What payment methods are accepted for PZU84-B11R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-B11R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-B11R?
PZU84-B11R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-B11R 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-B11R?
For technical support, including PZU84-B11R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-B11R requirements.
6.How does Aetrix verify that PZU84-B11R is sourced from the original manufacturer or authorized distributors?
All PZU84-B11R 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-B11R meets industry standards.
7.What is the process for return or replacement of PZU84-B11R?
All PZU84-B11R units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-B11R, 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-B11R part is unused and in its original packaging.
Return procedure for PZU84-B11R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU84-B11R Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
