NXP Semiconductors PZU5.6B3,115

Overview

PZU5.6B3,115 from NXP Semiconductors is a precision Zener diode in SOD323F (SC-90) package, designed for voltage regulation and reference functions at 5.6 V nominal Zener voltage with ±2 % tolerance, 100 Ω maximum differential resistance at I_Z = 5 mA, and 310 mW total power dissipation at T_amb ≤ 25 °C - used in low-power analog supply rails and sensor biasing circuits.

For engineers reviewing the PZU5.6B3,115 datasheet, PZU5.6B3,115 pinout, PZU5.6B3,115 application, or PZU5.6B3,115 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (R_th(j-a) = 400 K/W), reverse current (I_R ≤ 1 μA at V_R = 4.7 V), junction temperature limit (150 °C), and SOD323F footprint compatibility with high-density PCB layouts.

Technical Context

The PZU5.6B3,115 operates as a two-terminal voltage reference device with sharp reverse breakdown at 5.6 V under 5 mA test current. Its Zener voltage exhibits a positive temperature coefficient of +1.9 mV/K, minimizing drift across industrial temperature ranges.

It delivers stable regulation under low-current conditions (I_Z ≥ 0.5 mA) and supports transient suppression via non-repetitive peak reverse current capability of 5.5 A (t_p = 100 μs), enabled by its optimized silicon junction design and FR4 PCB thermal management.

Key Specifications

Pinout & Package

SOD323F (SC-90) plastic surface-mounted package: 2.3 mm × 1.35 mm body, 0.65 mm height, cathode marked by bar on top surface, optimized for reflow soldering on 0.5 mm pitch pads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Compared with PZU5.6B3,115, BZX384-B5V6,115 offers identical form factor but trades 20 Ω higher dynamic impedance for broader distributor availability, while MMSZ5232BS-7-F sacrifices accuracy and size for 61 % higher power rating - making PZU5.6B3,115 optimal for space-constrained, precision-regulated 5 V subsystems.

Availability

PZU5.6B3,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable medical monitors, and automotive body electronics requiring stable component supply with guaranteed long-term continuity.

Supply support for PZU5.6B3,115 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 markets.

The PZUxB series was developed to deliver high-precision, low-profile Zener regulation for miniaturized power management in space-constrained embedded systems - emphasizing tight tolerance, thermal robustness, and SMD manufacturability.

FAQ

What is the Zener voltage range for PZU5.6B3,115 at 5 mA test current?

The PZU5.6B3,115 has a specified Zener voltage range of 5.31 V to 5.92 V when tested at I_Z = 5 mA, reflecting its ±2 % B3-grade tolerance. This range is confirmed in Table 8 of the NXP datasheet and defines the actual regulation window under standard DC bias conditions. The PZU5.6B3,115 maintains this specification across −65 °C to +150 °C ambient temperatures, with minimal drift due to its +1.9 mV/K temperature coefficient.

Does PZU5.6B3,115 support reflow soldering, and what profile is recommended?

Yes, PZU5.6B3,115 is qualified for reflow soldering only - wave soldering is not recommended. NXP specifies use of standard lead-free reflow profiles compliant with JEDEC J-STD-020, with peak temperature ≤ 260 °C and time above liquidus ≤ 60 seconds. The SOD323F package outline and solder pad dimensions in Figure 6 of the datasheet must be followed precisely to ensure reliable joint formation and avoid tombstoning. The PZU5.6B3,115's thermal characteristics assume this mounting method on FR4 PCBs.

What is the maximum reverse leakage current for PZU5.6B3,115, and at what voltage is it measured?

The maximum reverse leakage current for PZU5.6B3,115 is 1 μA, measured at V_R = 4.7 V and T_j = 25 °C, as stated in Table 8 of the NXP datasheet. This value applies specifically to the PZU5.6B3 variant and reflects its tight tolerance grade. At lower voltages (e.g., V_R = 1 V), leakage drops below 100 nA. The PZU5.6B3,115's low leakage supports energy-efficient operation in always-on sensor biasing circuits where standby current must remain under 1 μA.

How does the thermal resistance of PZU5.6B3,115 affect its power derating?

PZU5.6B3,115 has a junction-to-ambient thermal resistance (R_th(j-a)) of 400 K/W in free air on standard FR4 PCBs. This means each watt dissipated raises the junction temperature by 400 K above ambient. Since its absolute maximum junction temperature is 150 °C, the device must be derated linearly above 25 °C ambient - e.g., at 75 °C ambient, maximum allowable power drops to 310 mW × (150−75)/(150−25) = 186 mW. The PZU5.6B3,115's derating curve is shown in Figure 4 of the datasheet.

Can PZU5.6B3,115 be used as a substitute for older PZU5.6B or PZU5.6B1 variants?

Yes, PZU5.6B3,115 is a direct functional upgrade to PZU5.6B (±5 %) and PZU5.6B1 (±2 %), sharing identical SOD323F package, pinout, and absolute maximum ratings. Its tighter ±2 % tolerance and lower 100 Ω differential resistance improve regulation accuracy and load regulation performance. All three variants use the same 12NC ordering code suffix structure (e.g., -115), so PZU5.6B3,115 can replace earlier versions without PCB changes - provided the design benefits from enhanced precision. The PZU5.6B3,115 remains fully compatible with existing footprints and assembly processes.