My Inquiry
My Account
Nexperia USA Inc. PZU84-C43-QR
- Part No.:
- PZU84-C43-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-C43-QR.pdf
- Description:
- DIODE ZENER 43V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,381
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PZU84-C43-QR from Nexperia is a Zener voltage regulator diode in SOT23 package, rated for 43 V nominal breakdown voltage (±5 % tolerance), 250 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It delivers stable reference voltage in low-current regulation circuits with differential resistance of 375 Ω at IZ = 2 mA and reverse current ≤ 0.05 μA at VR = 30.1 V.
For engineers reviewing the PZU84-C43-QR datasheet, PZU84-C43-QR pinout, PZU84-C43-QR application, or PZU84-C43-QR equivalent, this device serves as a precision voltage clamp in ECU power rail monitoring, sensor biasing, and overvoltage protection where low leakage and hard breakdown knee are critical.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with a specified working voltage of 40.0 V to 46.0 V at IZ = 2 mA. Its temperature coefficient is +0.05 mV/K, indicating near-zero thermal drift across operating temperature range.
Designed for automotive-grade reliability, it features intentional minor leakage rise to optimize fast switching response and reduce noise per AN90031, distinguishing it from the -B series variants optimized for ultra-low leakage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 40.0 V to 46.0 V at IZ = 2 mA - defines clamping threshold for 43 V nominal rail protection |
| Tolerance | Approximately ±5 % - enables cost-optimized selection where tight regulation is not required |
| Differential Resistance rdif | 375 Ω at IZ = 2 mA - determines voltage deviation under load current variation |
| Reverse Current IR | ≤ 0.05 μA at VR = 30.1 V - ensures minimal standby power loss in always-on circuits |
| Total Power Dissipation Ptot | 250 mW on FR4 PCB - sets maximum continuous DC power handling under standard mounting |
| Junction Temperature Tj | −55 °C to +150 °C - supports operation in under-hood automotive environments |
| Non-repetitive Peak Power | 40 W for 100 μs - enables transient surge suppression without failure |
Pinout & Package
Package: SOT23 plastic surface-mount 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) | Forward current entry point; connected to lower-potential node during regulation |
| 2 | Not Connected (n.c.) | Internally unconnected terminal; must remain floating or grounded per layout guidelines |
| 3 | Cathode (K) | Reverse-bias connection point; tied to regulated voltage rail or reference node |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS power domains |
| Optimized switching noise profile | Intentional minor leakage rise reduces high-frequency oscillation in feedback loops |
| Hard breakdown knee | Sharp transition into conduction improves voltage regulation accuracy at low currents |
| Low thermal resistance | Rth(j-sp) = 330 K/W to cathode solder point enables efficient heat transfer in compact layouts |
Applications
| Automotive ECU Voltage Clamp | Industrial Sensor Bias Reference |
|---|---|
Use Scenario: Clamping 48 V supply rail transients in engine control unit power management. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage limiter during load dump events. Use Value: Withstands 40 W non-repetitive surges and maintains <46 V clamping up to 150 °C junction temperature. |
Use Scenario: Providing stable 43 V bias for high-voltage current-sense amplifier input stage. IC Role / Device Role / Timing Role: Precision voltage reference source for analog front-end conditioning. Use Value: 375 Ω dynamic impedance ensures <10 mV output shift under 26 μA load variation. |
| On-Board Charger Overvoltage Protection | EV Battery Management System Reference |
Use Scenario: Protecting gate drivers in 400 V OBC DC-DC converter secondary side. IC Role / Device Role / Timing Role: Fast-response voltage clamp triggered by switching-induced spikes. Use Value: Optimized leakage profile minimizes false triggering while enabling sub-μs response to >40 V excursions. |
Use Scenario: Generating local 43 V reference for cell-string voltage monitoring circuitry. IC Role / Device Role / Timing Role: Stable Zener reference for ADC reference divider network. Use Value: ±5 % tolerance and +0.05 mV/K TC ensure <±1.5 % total error over −40 °C to +125 °C ambient. |
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-C43,115 | Same 43 V nominal, ±5 %, but SOT23-3L package with no n.c. pin; higher typical leakage (1 μA @ 34.4 V) | Lacks AEC-Q101 qualification; not recommended for automotive safety-critical rails | Select when cost sensitivity outweighs automotive qualification requirements |
| MMSZ43ET1G | 43 V, ±5 %, but 500 mW Ptot; rdif = 110 Ω at IZ = 5 mA; higher leakage (10 μA @ 34.4 V) | Higher power rating suits higher-current regulation; less suitable for ultra-low-power biasing | Choose for applications needing tighter regulation under >5 mA load current |
Compared with BZX84-C43,115 and MMSZ43ET1G, PZU84-C43-QR uniquely combines AEC-Q101 compliance, ultra-low leakage (<0.05 μA), and noise-optimized switching behavior-making it the only option among the three qualified for automotive power rail clamping where reliability and signal integrity are jointly critical.
Availability
PZU84-C43-QR is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and EV battery management system prototyping requiring stable component supply and full traceability.
Supply support for PZU84-C43-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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components.
The PZU84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for robust voltage regulation in harsh automotive environments including powertrain and chassis control systems.
FAQ
What is the exact Zener voltage range for PZU84-C43-QR at 2 mA test current?
The guaranteed breakdown voltage range is 40.0 V to 46.0 V at IZ = 2 mA, per Table 9 of the Rev. 4 datasheet. This reflects the ±5 % tolerance applied to the 43 V nominal rating and is verified under Tj = 25 °C conditions with pulse testing (tp ≤ 300 μs).
Is Pin 2 truly unconnected, or does it serve a thermal or mechanical function?
Pin 2 is electrically unconnected (n.c.) and has no internal bond wire or semiconductor connection. Its presence supports mechanical stability and standardized SOT23 footprint compatibility but must remain floating-no grounding or routing is permitted per Nexperia's layout guidance in Figure 10 and 11.
How does the "intentional minor rise of leakage current" improve noise performance?
Per Application Note AN90031, the controlled increase in leakage (vs. -B series) damps parasitic oscillations in high-speed switching nodes by reducing effective diode capacitance discontinuity at the breakdown knee, thereby lowering broadband noise generation in feedback paths.
Can PZU84-C43-QR replace PZU84-B43-Q in an existing design?
No-PZU84-B43-Q has tighter ±2 % tolerance, lower leakage (<0.05 μA at 34.4 V), and harder breakdown knee, while PZU84-C43-QR trades those for optimized switching noise. Substitution requires revalidation of regulation accuracy, standby current, and EMI behavior in the target circuit.
PZU84-C43-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):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.6 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-C43-QR FAQ
1.How can I place an order for PZU84-C43-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-C43-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-C43-QR reliable?
The price and inventory of PZU84-C43-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-C43-QR is usually 5 days.
3.What payment methods are accepted for PZU84-C43-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-C43-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-C43-QR?
PZU84-C43-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-C43-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-C43-QR?
For technical support, including PZU84-C43-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-C43-QR requirements.
6.How does Aetrix verify that PZU84-C43-QR is sourced from the original manufacturer or authorized distributors?
All PZU84-C43-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-C43-QR meets industry standards.
7.What is the process for return or replacement of PZU84-C43-QR?
All PZU84-C43-QR units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-C43-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-C43-QR part is unused and in its original packaging.
Return procedure for PZU84-C43-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU84-C43-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…
