My Inquiry
My Account
Nexperia USA Inc. PZU39BAX
- Part No.:
- PZU39BAX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
PZU39BAX.pdf
- Description:
- PZU39BA/SOD323/SOD2
- Quantity:
- Payment:
- Shipping:
Inventory:5,854
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PZU39BAX from Nexperia is a general-purpose Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and overvoltage protection in low-power analog circuits. It delivers a nominal 39 V Zener voltage with ±5 % tolerance (B-series), 350 Ω maximum differential resistance at IZ = 2 mA, reverse current ≤130 nA at 0.5 mA, and operates up to 150 °C junction temperature - commonly used in power supply feedback loops and sensor biasing networks.
For engineers reviewing the PZU39BAX datasheet, PZU39BAX pinout, PZU39BAX application, or PZU39BAX equivalent, key selection criteria include its 39 V nominal regulation voltage, low leakage performance at sub-mA currents, thermal resistance of 255 K/W (junction-to-solder point), and compatibility with standard reflow soldering footprints for SOD323 packages.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and input conditions. Its 39 V nominal working voltage falls within the high-voltage segment of the PZUxBA series, where temperature coefficient is +0.7 mV/K and diode capacitance is 45 pF at 1 MHz and 0 V.
The device features intentional minor leakage rise per AN90031 to optimize fast switching response and reduce noise in regulation paths. It supports non-repetitive surge handling up to 45 A peak reverse current (tp = 100 µs) and dissipates up to 40 W peak power during transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 37.0 V to 41.0 V at IZ = 2 mA - defines regulation setpoint with ±5 % tolerance for stable reference generation |
| Differential Resistance rdif | ≤350 Ω at IZ = 2 mA - determines output impedance and regulation accuracy under load variation |
| Reverse Current IR | ≤130 nA at VR = 0.5 × VZ - ensures minimal standby power loss in high-impedance bias networks |
| Temperature Coefficient SZ | +0.7 mV/K - quantifies voltage drift per degree Celsius, critical for thermal stability in industrial environments |
| Diode Capacitance Cd | 45 pF at f = 1 MHz, VR = 0 V - impacts high-frequency noise rejection and transient response in filtering applications |
| Non-repetitive Peak Current IZSM | 45 A at tp = 100 µs - enables robust transient voltage suppression without permanent damage |
| Total Power Dissipation Ptot | 320 mW at Tamb ≤ 25 °C on FR4 PCB - sets continuous DC power handling limit for thermal design |
Pinout & Package
The PZU39BAX is housed in a SOD323 (SC-76) surface-mount plastic package measuring 1.7 mm × 1.25 mm × 0.95 mm, optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output node; marking bar on package identifies this terminal |
| 2 | Anode | Connected to ground or lower-potential rail; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-leakage Zener regulation | IR ≤130 nA at 0.5 mA enables use in ultra-low-power sensor references and battery-backed circuits |
| Hard breakdown knee | Sharp turn-on characteristic ensures predictable clamping behavior in overvoltage protection circuits |
| Optimized for noise reduction | Intentional minor leakage rise per AN90031 improves switching speed and reduces broadband noise in feedback paths |
| SOD323 footprint compatibility | Standard 1.3 mm pitch and 1.7 mm × 1.25 mm body allows drop-in replacement in space-constrained designs |
| High surge capability | 40 W non-repetitive peak power dissipation supports transient immunity in industrial power rails |
Applications
| Power Supply Feedback Loop | Sensor Bias Reference |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or buck-derived auxiliary supplies. IC Role / Device Role / Timing Role: Provides precise 39 V reference for optocoupler-based feedback network. Use Value: Enables tight output regulation (±1.5 %) across line/load/temperature variations without external trimming. |
Use Scenario: Supplying stable bias voltage to high-impedance pressure or temperature transducers. IC Role / Device Role / Timing Role: Acts as low-drift, low-noise voltage reference source for analog front-end conditioning. Use Value: Delivers <130 nA leakage and +0.7 mV/K TC to minimize measurement offset drift in 0–100 °C operating range. |
| Overvoltage Clamp Circuit | ADC Input Protection |
Use Scenario: Protecting downstream logic or interface ICs from 48 V bus transients in industrial control modules. IC Role / Device Role / Timing Role: Shunts excess energy above 39 V to ground during ESD or surge events. Use Value: Withstands 45 A peak surge (100 µs) and recovers fully without parameter shift, ensuring long-term reliability. |
Use Scenario: Limiting input voltage to 12-bit SAR ADCs with 5 V full-scale range in data acquisition systems. IC Role / Device Role / Timing Role: Clamps input excursions beyond safe rail limits while adding minimal parasitic capacitance. Use Value: 45 pF capacitance avoids signal integrity degradation at sampling rates up to 1 MSPS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B39 | Same 39 V nominal, ±5 %, but higher typical leakage (≤500 nA) and 600 Ω rdif | Limited to less demanding regulation tasks where tighter voltage stability is not required | Choose when cost sensitivity outweighs low-leakage or low-impedance needs |
| MMSZ5242B | 39 V nominal, ±5 %, but rated only for 500 mW Ptot and lacks specified surge rating | Suitable for steady-state reference only; not recommended for transient-prone environments | Select only for non-surge applications with ample thermal margin on larger PCB copper areas |
Compared with BZX384-B39 and MMSZ5242B, PZU39BAX offers superior low-current regulation (350 Ω rdif, 130 nA IR) and verified 40 W surge capability - making it preferred for precision feedback and ruggedized industrial interfaces where long-term stability and transient resilience are critical.
Availability
PZU39BAX is available at Aetrix Electronics and suitable for power supply feedback loops, sensor bias references, overvoltage clamp circuits, and ADC input protection requiring stable component supply and traceable sourcing.
Supply support for PZU39BAX 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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and sustainability.
The PZUxBA series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered specifically for compact, high-reliability voltage reference and protection in consumer, industrial, and automotive-qualified (where specified) applications.
FAQ
What is the maximum continuous power dissipation for PZU39BAX at 70 °C ambient?
At 70 °C ambient, derated power dissipation is approximately 220 mW based on the 320 mW rating at 25 °C and thermal resistance of 255 K/W (junction-to-solder point). This assumes standard FR4 PCB mounting with single-sided 1 cm² cathode pad per datasheet condition [3]. No forced airflow or heatsinking is assumed.
Does PZU39BAX meet AEC-Q200 requirements for automotive use?
No - PZU39BAX is not automotive-qualified. The datasheet explicitly states "Non-automotive qualified products" and confirms no AEC-Q200 testing or qualification has been performed. It is intended for industrial, consumer, and computing applications only.
How does the +0.7 mV/K temperature coefficient affect regulation accuracy over –40 °C to +85 °C?
Over a 125 K temperature span, the total VZ drift is approximately +87.5 mV (0.7 mV/K × 125 K), representing ±0.22 % of 39 V. Combined with initial ±5 % tolerance, worst-case regulation band spans 36.9 V to 41.1 V across full temperature range.
Can PZU39BAX be used in parallel for higher power handling?
No - Zener diodes must not be paralleled due to mismatched breakdown voltages causing current hogging and thermal runaway. For higher power, use a single higher-rated Zener or implement active regulation with a pass transistor driven by a reference diode.
PZU39BAX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
PZU39BAX FAQ
1.How can I place an order for PZU39BAX through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU39BAX 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 PZU39BAX reliable?
The price and inventory of PZU39BAX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU39BAX is usually 5 days.
3.What payment methods are accepted for PZU39BAX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU39BAX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU39BAX?
PZU39BAX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU39BAX 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 PZU39BAX?
For technical support, including PZU39BAX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU39BAX requirements.
6.How does Aetrix verify that PZU39BAX is sourced from the original manufacturer or authorized distributors?
All PZU39BAX 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 PZU39BAX meets industry standards.
7.What is the process for return or replacement of PZU39BAX?
All PZU39BAX units undergo pre-shipment inspection (PSI). If there is an issue with PZU39BAX, 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 PZU39BAX part is unused and in its original packaging.
Return procedure for PZU39BAX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU39BAX 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…
