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Nexperia USA Inc. PZU12B3A,115
- Part No.:
- PZU12B3A,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PZU12B3A,115.pdf
- Description:
- DIODE ZENER 12V 320MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
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Product details
Overview
PZU12B3A,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 12 V nominal working voltage, 320 mW total power dissipation at 25 °C ambient, and 9 A non-repetitive peak reverse current. It delivers low dynamic impedance (80 Ω max at IZ = 5 mA), tight temperature coefficient (±3 mV/K typical), and optimized leakage for fast switching in precision reference and overvoltage protection circuits.
For engineers reviewing the PZU12B3A,115 datasheet, PZU12B3A,115 pinout, PZU12B3A,115 application, or PZU12B3A,115 equivalent, key selection criteria include Zener voltage tolerance (±2 %), differential resistance at 5 mA, thermal resistance to solder point (255 K/W), and SC-76 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable DC voltage under varying load and line conditions. Its hard breakdown knee and intentional minor leakage rise support noise reduction and transient response in feedback loops.
Designed for surface-mounted use on FR4 PCBs with single-sided copper, it relies on thermal conduction through cathode pad (Rth(j–sp) = 255 K/W) and exhibits a temperature coefficient of +3 mV/K at IZ = 5 mA - enabling predictable drift compensation in voltage references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 12 V nominal, ±2 % tolerance (11.76–12.24 V), ensuring precise regulation in 12 V rail monitoring |
| Differential Resistance rdif | ≤80 Ω at IZ = 5 mA, minimizing output voltage variation under load current changes |
| Reverse Current IR | ≤10 nA at VR = 9 V, enabling ultra-low standby power in battery-backed circuits |
| Total Power Dissipation Ptot | 320 mW at Tamb ≤ 25 °C on standard FR4 PCB, defining continuous operating limit |
| Non-repetitive Peak Reverse Current IZSM | 9 A for tp = 100 µs square wave, supporting surge suppression in transient protection stages |
| Thermal Resistance Rth(j–sp) | 255 K/W to solder point, critical for thermal design when mounting on 1 cm² cathode pad |
| Temperature Coefficient SZ | +3 mV/K at IZ = 5 mA, allowing predictable voltage drift modeling across –55 to +150 °C |
Pinout & Package
Package: SOD323 (SC-76), plastic surface-mount package, 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, marking bar indicates cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode | Connected to ground or lower-potential reference; forms reverse-biased junction during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance (B3 series) | Enables tighter regulation than ±5 % variants, reducing need for post-regulation trimming in precision supplies |
| Optimized leakage for fast switching | Intentional minor IR rise improves transient response and reduces ringing in feedback paths per AN90031 |
| Low dynamic impedance (80 Ω max @ 5 mA) | Maintains stable output under dynamic load steps common in microcontroller reset and ADC reference circuits |
| SOD323 footprint compatibility | Supports automated placement and reflow on high-density boards without requiring custom land patterns |
| 150 °C maximum junction temperature | Allows operation in industrial environments with minimal derating up to +105 °C ambient |
Applications
| Power Supply Voltage Reference | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Providing stable 12 V reference for analog-to-digital converters and voltage comparators in industrial sensor modules. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference, sinking excess current to hold node at precise 12 V ±2 %. Use Value: Low 80 Ω dynamic impedance ensures <10 mV deviation under 1 mA load variation, improving ADC accuracy. |
Use Scenario: Clamping input voltage to protect downstream LDOs and microcontrollers from 15 V transients on 12 V supply rails. IC Role / Device Role / Timing Role: Shunt clamp activated during overvoltage events, diverting surge current away from sensitive ICs. Use Value: 9 A non-repetitive peak current rating handles 100 µs surges without degradation, meeting IEC 61000-4-4 level 3. |
| Microcontroller Reset Circuit | Current-Limited Bias Generator |
|
Use Scenario: Generating clean, temperature-stable reset threshold for ARM Cortex-M0+ MCUs in automotive body control units. IC Role / Device Role / Timing Role: Forms part of RC-reset network where Zener sets accurate trip voltage independent of VDD variation. Use Value: +3 mV/K temperature coefficient enables predictable reset threshold shift, simplifying thermal margin analysis. |
Use Scenario: Biasing op-amp input stages in low-power instrumentation amplifiers using constant-current source topology. IC Role / Device Role / Timing Role: Provides stable voltage drop across series resistor to generate precise bias current. Use Value: ≤10 nA reverse leakage at 9 V ensures <100 nA error in 10 µA bias currents, preserving amplifier PSRR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B12,115 | Same 12 V ±2 % rating, but SOD323 package with higher 100 Ω rdif and 100 nA IR at 9 V | Less suitable for low-noise reference use due to higher leakage and impedance | Select when cost sensitivity outweighs precision requirements and thermal performance is secondary |
| MMSZ4687T1G | 12 V ±5 % tolerance, SOD123 package (larger footprint), 100 Ω rdif, 100 nA IR | Requires PCB redesign; not suitable for space-constrained designs needing SOD323 | Choose only if legacy SOD123 layout reuse is mandatory and ±5 % tolerance is acceptable |
Compared with BZX384-B12,115 and MMSZ4687T1G, PZU12B3A,115 offers superior regulation precision (±2 % vs ±5 %), lower dynamic impedance (80 Ω vs ≥100 Ω), and significantly reduced leakage (10 nA vs 100 nA), making it optimal for high-accuracy, low-power, and high-density applications.
Availability
PZU12B3A,115 is available at Aetrix Electronics and suitable for industrial power supply references, automotive body electronics overvoltage clamps, and medical sensor biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PZU12B3A,115 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 logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for automotive, industrial, and consumer markets.
PZUxBA series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered for high-precision voltage reference and transient protection in space-constrained, thermally demanding SMD applications.
FAQ
What is the maximum continuous power dissipation for PZU12B3A,115 at 70 °C ambient?
At 70 °C ambient, derating applies per the thermal resistance curve: Ptot = 320 mW × (1 − (70 − 25)/150) = 224 mW. This assumes mounting on FR4 PCB with single-sided copper and standard footprint per datasheet condition [3]. Exceeding this risks junction temperature exceeding 150 °C.
How does the B3 tolerance series differ from B1/B2 in the PZUxBA family?
B3 denotes ±2 % Zener voltage tolerance at IZ = 5 mA, identical to B1 and B2 in spec; the distinction lies in marking code (VN for PZU12B3A) and binning granularity. All three meet the same electrical limits, but B3 parts are selected from tighter distribution tails for enhanced consistency in high-volume calibration-critical applications.
Can PZU12B3A,115 be used in place of PZU12B2A,115?
Yes - both share identical electrical specifications, package, and marking format (VN). The B2/B3 designation reflects different production lots and test bins within the same ±2 % tolerance band; no circuit-level differences exist. Substitution requires no layout or schematic change.
What is the recommended reflow profile for SOD323 mounting of PZU12B3A,115?
Per Nexperia's SOD323 footprint guidelines (Fig. 10), use standard Pb-free reflow: preheat 150–200 °C for 60–120 s, soak 200–220 °C for 60–90 s, peak 260 °C max for ≤10 s. Maintain solder paste volume per 0.5 mm² pad area and avoid thermal shock by limiting ramp rates to ≤3 °C/s before and after peak.
PZU12B3A,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 320 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 9 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
PZU12B3A,115 FAQ
1.How can I place an order for PZU12B3A,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU12B3A,115 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 PZU12B3A,115 reliable?
The price and inventory of PZU12B3A,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU12B3A,115 is usually 5 days.
3.What payment methods are accepted for PZU12B3A,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU12B3A,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU12B3A,115?
PZU12B3A,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU12B3A,115 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 PZU12B3A,115?
For technical support, including PZU12B3A,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU12B3A,115 requirements.
6.How does Aetrix verify that PZU12B3A,115 is sourced from the original manufacturer or authorized distributors?
All PZU12B3A,115 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 PZU12B3A,115 meets industry standards.
7.What is the process for return or replacement of PZU12B3A,115?
All PZU12B3A,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU12B3A,115, 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 PZU12B3A,115 part is unused and in its original packaging.
Return procedure for PZU12B3A,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU12B3A,115 Tags
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