My Inquiry
My Account
Nexperia USA Inc. PZU84-B3V3-QR
- Part No.:
- PZU84-B3V3-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-B3V3-QR.pdf
- Description:
- DIODE ZENER 3.3V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,488
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PZU84-B3V3-QR from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, rated for 3.3 V nominal breakdown at 5 mA, with differential resistance ≤95 Ω, reverse leakage ≤5 μA at 1 V, and AEC-Q101 qualification for automotive power rail stabilization.
For engineers reviewing the PZU84-B3V3-QR datasheet, PZU84-B3V3-QR pinout, PZU84-B3V3-QR application, or PZU84-B3V3-QR equivalent, key selection criteria include tight voltage tolerance, low dynamic impedance at low bias current, hard breakdown knee, and automotive-grade reliability under ambient temperatures from −55 °C to +150 °C.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable reference voltage across load variations. Its hard breakdown knee and low rdif (≤95 Ω at IZ = 5 mA) ensure minimal voltage deviation under dynamic current changes.
Designed for precision regulation in space-constrained automotive subsystems, it delivers temperature coefficient of −3.5 mV/K (typical) and diode capacitance of 410 pF at 1 MHz, enabling stable performance in noise-sensitive analog supply rails and ECU voltage monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.3 V at IZ = 5 mA - precise reference for 3.3 V logic rail clamping or feedback sensing |
| Voltage Tolerance | ±2 % - ensures tight regulation without post-production trimming in safety-critical modules |
| Differential Resistance | ≤95 Ω at IZ = 5 mA - minimizes output voltage shift under load transients |
| Reverse Leakage Current | ≤5 μA at VR = 1 V - reduces quiescent power loss in always-on vehicle networks |
| Power Dissipation | 250 mW at Tamb = 25 °C - supports continuous operation on standard FR4 PCB with 70 μm copper |
| Junction Temperature | −55 °C to +150 °C - validated for under-hood and transmission control unit environments |
| AEC-Q101 Qualified | Yes - meets stress test requirements for discrete semiconductors in automotive applications |
Pinout & Package
Package: SOT23 - surface-mounted plastic package, 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, 3-terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node; reverse-bias polarity required for Zener operation |
| 2 | Not Connected (n.c.) | Internal die pad left unconnected - no electrical function; must remain floating in layout |
| 3 | Cathode (K) | Connected to higher-potential node; primary current entry point during breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Hard breakdown knee | Sharp, well-defined Zener transition enables reliable overvoltage clamping without soft saturation |
| Low leakage at low VR | ≤5 μA at 1 V reverse bias - preserves battery life in always-on automotive modules |
| Optimized thermal resistance | Rth(j-sp) = 330 K/W - efficient heat transfer from junction to cathode solder point on PCB |
| Automotive-qualified construction | AEC-Q101 compliant - screened for mechanical shock, temperature cycling, and humidity robustness |
| Small-footprint SMT packaging | SOT23 footprint compatible with high-density PCB assembly and automated reflow processes |
Applications
| Engine Control Unit (ECU) Reference | Body Control Module (BCM) Voltage Clamp |
|---|---|
|
Use Scenario: Stabilizing 3.3 V microcontroller supply rail against load-induced ripple and battery voltage fluctuations in engine management systems. IC Role / Device Role / Timing Role: Zener regulator providing fixed reference voltage for ADC reference and internal LDO feedback. Use Value: ±2 % tolerance and ≤95 Ω rdif ensure <±15 mV output variation across 1–10 mA load range, meeting ASIL-B functional safety margin requirements. |
Use Scenario: Clamping CAN transceiver VIO supply to prevent overvoltage damage during load dump events in door module electronics. IC Role / Device Role / Timing Role: Standby-mode voltage limiter protecting 3.3 V interface circuitry from transient surges up to 40 W non-repetitive peak power. Use Value: Hard breakdown knee and 150 °C max junction temperature allow sustained operation during 100 μs surge pulses without parameter drift. |
| Infotainment System Power Monitor | ADAS Camera Module Bias Supply |
|
Use Scenario: Monitoring 3.3 V rail integrity in head unit power sequencing logic using comparator input referenced to Zener-stabilized voltage. IC Role / Device Role / Timing Role: Precision voltage reference for rail-good detection circuit with fast response to undervoltage faults. Use Value: Low 410 pF capacitance avoids signal delay in comparator input path, enabling sub-10 μs fault detection latency. |
Use Scenario: Providing stable bias voltage for image sensor analog front-end in rear-view camera modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Temperature-compensated reference source maintaining consistent sensor gain calibration across −40 °C to +105 °C. Use Value: −3.5 mV/K temperature coefficient minimizes reference drift to <±10 mV over full operating range, preserving image linearity. |
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-C3V3,115 (Nexperia) | ±5 % tolerance, higher rdif (≤100 Ω), same SOT23 package and 3.3 V nominal rating | Lower cost; suitable for non-safety-critical consumer-grade supplies where tighter regulation is not required | Select when AEC-Q101 qualification and ±2 % tolerance are not mandatory, and cost sensitivity outweighs precision needs |
| MMSZ4685T1G (onsemi) | ±5 % tolerance, 3.3 V nominal, 500 mW power rating, SOD-123 package (larger footprint) | Higher power handling but incompatible pinout and thermal profile; requires PCB redesign | Choose only if board-level thermal constraints demand >250 mW dissipation and SOD-123 layout is already established |
Compared with BZX84-C3V3,115, PZU84-B3V3-QR offers tighter tolerance and automotive qualification at identical footprint; versus MMSZ4685T1G, it trades power headroom for AEC-Q101 compliance and smaller SOT23 area-critical for compact ECU designs.
Availability
PZU84-B3V3-QR is available at Aetrix Electronics and suitable for automotive ECU design, body electronics development, and ADAS camera module production requiring stable component supply with guaranteed long-term continuity.
Supply support for PZU84-B3V3-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, reliable discrete and logic devices for automotive, industrial, and mobile markets.
The PZU84-Q series belongs to Nexperia's AEC-Q101-qualified Zener regulator portfolio, engineered specifically for precision voltage reference and clamping in harsh automotive environments where stability, low leakage, and repeatable breakdown behavior are critical.
FAQ
What is the maximum reverse current before breakdown for PZU84-B3V3-QR?
At VR = 1 V, the reverse leakage current is guaranteed ≤5 μA per datasheet Table 8. This low leakage ensures minimal standby power draw in always-on automotive circuits such as CAN wake-up receivers and real-time clock supervisors.
Can PZU84-B3V3-QR be used in parallel for higher power dissipation?
No-Zener diodes exhibit negative temperature coefficients and mismatched breakdown voltages, causing current hogging and thermal runaway when paralleled. For higher power, use a single higher-rated device or an active shunt regulator topology.
Is Pin 2 electrically isolated or internally bonded?
Pin 2 is explicitly marked "n.c." (not connected) in Table 2 and confirmed as unconnected in the simplified outline graphic. It must remain unconnected in PCB layout-no routing, soldering, or grounding is permitted.
How does the −3.5 mV/K temperature coefficient affect regulation accuracy over temperature?
Over a −40 °C to +125 °C range, the coefficient causes ~575 mV total drift (165 K × 3.5 mV/K), but since VZ = 3.3 V, this represents ~17 % relative change-mitigated by system-level calibration or use within narrower ambient bands typical of sealed ECUs.
PZU84-B3V3-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):
- 3.3 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 1000 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 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-B3V3-QR FAQ
1.How can I place an order for PZU84-B3V3-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-B3V3-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-B3V3-QR reliable?
The price and inventory of PZU84-B3V3-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-B3V3-QR is usually 5 days.
3.What payment methods are accepted for PZU84-B3V3-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-B3V3-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-B3V3-QR?
PZU84-B3V3-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-B3V3-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-B3V3-QR?
For technical support, including PZU84-B3V3-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-B3V3-QR requirements.
6.How does Aetrix verify that PZU84-B3V3-QR is sourced from the original manufacturer or authorized distributors?
All PZU84-B3V3-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-B3V3-QR meets industry standards.
7.What is the process for return or replacement of PZU84-B3V3-QR?
All PZU84-B3V3-QR units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-B3V3-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-B3V3-QR part is unused and in its original packaging.
Return procedure for PZU84-B3V3-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU84-B3V3-QR 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…
