My Inquiry
My Account
NXP Semiconductors PZU4.3B3,115
- Part No.:
- PZU4.3B3,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
PZU4.3B3,115.pdf
- Description:
- DIODE ZENER 4.3V 310MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:159,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PZU4.3B3,115 from NXP Semiconductors is a precision Zener diode optimized for voltage regulation and reference applications in space-constrained SMD designs. It delivers a nominal 4.3 V Zener voltage at 5 mA with ±2 % tolerance (B3 grade), 90 Ω maximum differential resistance, and 3 μA reverse current at 1 V, housed in the ultra-compact SOD323F (SC-90) package.
For engineers reviewing the PZU4.3B3,115 datasheet, PZU4.3B3,115 pinout, PZU4.3B3,115 application, or PZU4.3B3,115 equivalent, key selection criteria include tight voltage tolerance, low dynamic impedance, thermal coefficient behavior across operating current, and SOD323F footprint compatibility with high-density PCB layouts.
Technical Context
The PZU4.3B3,115 operates as a two-terminal shunt regulator, maintaining stable output voltage by conducting reverse current above its breakdown threshold. Its Zener voltage is specified at IZ = 5 mA, with differential resistance measured under the same condition.
Thermal performance is defined for two mounting conditions: standard FR4 PCB footprint (Rth(j-a) = 400 K/W) and enhanced cathode pad (Rth(j-a) = 230 K/W). Junction temperature is rated to 150 °C, and ambient operating range spans −65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.28 V to 4.48 V at IZ = 5 mA - defines regulation setpoint with ±2 % accuracy for precision biasing |
| Differential Resistance (rdif) | ≤90 Ω at IZ = 5 mA - ensures minimal output voltage shift under load current variation |
| Reverse Current (IR) | ≤3 μA at VR = 1 V - guarantees low leakage in standby or low-power monitoring circuits |
| Temperature Coefficient (SZ) | −2.5 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius for thermal stability analysis |
| Total Power Dissipation (Ptot) | 310 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard PCB layout |
| Forward Voltage (VF) | ≤1.1 V at IF = 100 mA - defines anode-cathode drop during forward conduction, relevant for ESD protection paths |
| Junction Temperature (Tj) | 150 °C maximum - determines thermal derating limits and reliability envelope in sealed enclosures |
Pinout & Package
SOD323F (SC-90) is a 2-pin surface-mount plastic package measuring 2.7 mm × 1.6 mm × 0.95 mm, with gull-wing leads and cathode marked by a bar on the device top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output node; polarity marker (bar) aligns with this terminal; carries reverse breakdown current |
| 2 | Anode | Connected to ground or lower-potential rail; completes Zener conduction path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance (B3 grade) | Enables tighter regulation margins than standard ±5 % parts, reducing need for post-calibration trimming |
| Low 90 Ω dynamic impedance | Minimizes output voltage variation under changing load currents, critical for analog reference stability |
| SOD323F ultra-small footprint | Supports high-density routing in portable and wearables where board area is constrained to < 5 mm² per device |
| −2.5 mV/K temperature coefficient | Provides predictable, linear voltage drift over temperature-enables compensation in precision sensor front-ends |
| 310 mW power rating on standard FR4 | Allows direct replacement of larger-package Zeners without thermal redesign when using typical 1-oz copper layouts |
Applications
| Power Supply Regulation | Reference Voltage Generation |
|---|---|
Use Scenario: Stabilizing 5 V rail in microcontroller-based IoT sensor nodes with variable battery input. IC Role / Device Role / Timing Role: Shunt regulator clamping excess voltage across bypass capacitor to maintain clean 4.3 V reference for ADC and LDO feedback. Use Value: Tight ±2 % tolerance ensures consistent ADC full-scale calibration across production batches without software correction. |
Use Scenario: Providing stable bias voltage for op-amp comparators in industrial temperature monitoring circuits. IC Role / Device Role / Timing Role: Precision voltage reference source establishing trip-point thresholds independent of supply fluctuations. Use Value: −2.5 mV/K tempco enables predictable offset compensation across −40 °C to +85 °C operating range. |
| Overvoltage Protection Clamping | Signal Level Translation |
Use Scenario: Protecting GPIO pins of automotive body control modules from load-dump transients. IC Role / Device Role / Timing Role: Fast-acting clamp diverting surge energy to ground before IC input structures exceed breakdown limits. Use Value: 310 mW continuous rating supports sustained clamping during slow-rising 12 V system overvoltages up to 100 ms. |
Use Scenario: Translating 3.3 V logic signals to 4.3 V interface levels in mixed-voltage FPGA I/O banks. IC Role / Device Role / Timing Role: Passive level shifter using forward-biased anode and Zener-clamped cathode to define upper rail. Use Value: Low 1.1 V forward voltage ensures minimal propagation delay and preserves signal rise/fall integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B4V3,115 | Same SOD323F package and 4.3 V nominal voltage, but ±5 % tolerance (B grade) and higher 120 Ω rdif | Acceptable where regulation accuracy > ±2 % is sufficient and cost sensitivity outweighs precision needs | Select BZX384-B4V3,115 only if ±5 % tolerance and higher impedance are acceptable for the target circuit's error budget. |
| MMSZ4V3ET1G | SOD-123 package (larger footprint), ±5 % tolerance, 90 Ω rdif, 500 mW Ptot on FR4 | Preferred where higher power dissipation or legacy footprint compatibility is required over miniaturization | Choose MMSZ4V3ET1G when board layout allows SOD-123 and thermal margin exceeds 310 mW, especially in industrial power supplies. |
Compared with BZX384-B4V3,115 and MMSZ4V3ET1G, the PZU4.3B3,115 uniquely combines ±2 % tolerance, 90 Ω impedance, and SOD323F size-making it optimal for high-accuracy, space-limited regulation where tighter voltage control directly improves system-level measurement fidelity.
Availability
PZU4.3B3,115 is available at Aetrix Electronics and suitable for power supply regulation, reference voltage generation, overvoltage protection clamping, and signal level translation requiring stable component supply across high-mix, low-volume production runs.
Supply support for PZU4.3B3,115 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The PZUxB series was developed to deliver high-precision, miniature Zener regulation for compact, thermally constrained embedded systems-emphasizing tight tolerance, low dynamic impedance, and robust SMD manufacturability.
FAQ
What is the Zener voltage tolerance of PZU4.3B3,115?
The PZU4.3B3,115 has a Zener voltage tolerance of ±2 %, corresponding to a guaranteed range of 4.28 V to 4.48 V at 5 mA test current. This B3-grade tolerance is tighter than standard ±5 % Zeners and is confirmed in Table 8 of the NXP datasheet. The PZU4.3B3,115 achieves this precision through process-controlled doping and post-trimming validation.
What is the maximum continuous power dissipation for PZU4.3B3,115 on a standard PCB?
The PZU4.3B3,115 has a maximum total power dissipation of 310 mW when mounted on an FR4 PCB with single-sided copper, tin-plated, and standard footprint (per Table 1 and Table 5). This value drops with rising ambient temperature per the derating curve in Figure 4. The PZU4.3B3,115 must be operated within this limit to avoid junction overheating beyond 150 °C.
How is the cathode identified on the PZU4.3B3,115 package?
The cathode of the PZU4.3B3,115 is marked by a visible bar on the top surface of the SOD323F package and corresponds to Pin 1 in the pinning diagram. This marking aligns with the simplified outline in Table 2 and is consistent across all PZUxB series devices. The PZU4.3B3,115 must be oriented correctly during placement to ensure proper reverse-bias operation.
What is the differential resistance of PZU4.3B3,115 and why does it matter?
The PZU4.3B3,115 has a maximum differential resistance of 90 Ω at IZ = 5 mA, as specified in Table 8. This parameter reflects how much the Zener voltage changes per unit change in current-lower rdif means better regulation under varying load conditions. In practice, the PZU4.3B3,115 maintains tighter output voltage stability than Zeners with rdif > 100 Ω in precision analog circuits.
Can PZU4.3B3,115 be used in reflow soldering processes?
Yes, the PZU4.3B3,115 is qualified for reflow soldering only, as explicitly stated in Section 10 of the NXP datasheet. It is not recommended for wave or hand soldering. The device complies with JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for standard reflow profiles, and its SOD323F package is designed for compatibility with 4 mm pitch tape-and-reel feeding (115 variant denotes 3000-unit reel).
PZU4.3B3,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- 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:
- -
PZU4.3B3,115 FAQ
1.How can I place an order for PZU4.3B3,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU4.3B3,115 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 PZU4.3B3,115 reliable?
The price and inventory of PZU4.3B3,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU4.3B3,115 is usually 5 days.
3.What payment methods are accepted for PZU4.3B3,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU4.3B3,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU4.3B3,115?
PZU4.3B3,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU4.3B3,115 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 PZU4.3B3,115?
For technical support, including PZU4.3B3,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU4.3B3,115 requirements.
6.How does Aetrix verify that PZU4.3B3,115 is sourced from the original manufacturer or authorized distributors?
All PZU4.3B3,115 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 PZU4.3B3,115 meets industry standards.
7.What is the process for return or replacement of PZU4.3B3,115?
All PZU4.3B3,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU4.3B3,115, 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 PZU4.3B3,115 part is unused and in its original packaging.
Return procedure for PZU4.3B3,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU4.3B3,115 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…
