Nexperia USA Inc. BZT52H-B3V3,115

Overview

BZT52H-B3V3,115 from Nexperia is a ±2 % tolerance Zener diode in SOD123F package, designed for precision voltage regulation and reference applications at 3.3 V nominal breakdown voltage with 5 Ω typical differential resistance at I_Z = 5 mA and 830 mW total power dissipation at T_amb ≤ 25 °C. It serves as a stable shunt voltage reference in low-power analog circuits, power supply feedback networks, and overvoltage protection clamps.

For engineers reviewing the BZT52H-B3V3,115 datasheet, BZT52H-B3V3,115 pinout, BZT52H-B3V3,115 application, or BZT52H-B3V3,115 equivalent, this page delivers verified Zener voltage, thermal resistance (R_th(j-sp) = 150 K/W), reverse current (I_R ≤ 5 μA at V_R = 1 V), forward voltage (V_F ≤ 0.9 V at I_F = 10 mA), and SOD123F footprint compatibility for rapid PCB integration.

Technical Context

This device operates in reverse-biased Zener breakdown mode with a nominal V_Z of 3.3 V at I_Z = 5 mA, exhibiting a temperature coefficient of −3.5 to 0.0 mV/K and differential resistance of ≤95 Ω. Its design targets stable DC voltage reference generation under low-current conditions (I_Z = 1–5 mA) with minimal thermal drift.

The SOD123F package enables surface-mount assembly on FR4 PCBs with single-sided copper, using a 1 cm² cathode pad for optimal thermal performance (R_th(j-sp) = 150 K/W). It supports non-repetitive surge handling up to 6.0 A (t_p = 100 μs) and junction temperatures up to 150 °C.

Key Specifications

Pinout & Package

The BZT52H-B3V3,115 is housed in a compact SOD123F surface-mount plastic package (3.6 mm × 1.7 mm × 1.0 mm), optimized for automated placement and reflow soldering on FR4 PCBs with standard footprint per Figure 12.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZT52C3V3,115, the BZT52H-B3V3,115 offers tighter voltage control and higher power headroom; versus MMSZ4685T1G, it provides 66 % greater power handling and superior thermal resistance-critical for sustained regulation in compact layouts.

Availability

BZT52H-B3V3,115 is available at Aetrix Electronics and suitable for power supply feedback networks, overvoltage protection circuits, and precision reference voltage sources requiring stable component supply across industrial, consumer, and communications equipment lifecycles.

Supply support for BZT52H-B3V3,115 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, reliable discrete, logic, and MOSFET solutions with focus on efficiency, miniaturization, and robustness for mass-market electronics.

The BZT52H series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for cost-effective, space-constrained voltage regulation and reference functions in consumer, computing, and industrial power management systems.

FAQ

What is the maximum continuous Zener current for BZT52H-B3V3,115 at 70 °C ambient?

At T_amb = 70 °C, derating applies: P_tot drops linearly from 830 mW at 25 °C to 0 W at 150 °C. At 70 °C, allowable power is 581 mW. With V_Z ≈ 3.3 V, max continuous I_Z = 581 mW / 3.3 V ≈ 176 mA - but practical limit is 100 mA to maintain <100 °C junction temperature and ensure long-term reliability.

Can BZT52H-B3V3,115 be used in place of a 3.3 V LDO for low-noise analog supplies?

No - this Zener diode lacks the low-output-impedance, high-PSRR, and current-limiting features of an LDO. It provides passive regulation only and exhibits higher noise, poorer line/load regulation, and no short-circuit protection. Use only where simple shunt reference or clamping is sufficient, not as a replacement for active regulators.

Is the SOD123F package compatible with standard SOD-123 reflow footprints?

Yes - the SOD123F has identical lead spacing (2.5 mm) and overall length (3.6 mm) as SOD-123, but reduced height (1.0 mm vs. 1.2 mm) and narrower body (1.5 mm vs. 1.7 mm). The recommended reflow footprint (2.8 mm × 1.6 mm solder land) fits both packages, though SOD123F achieves better thermal performance due to optimized cathode pad contact.

What is the typical capacitance of BZT52H-B3V3,115 at 0 V reverse bias?

Diode capacitance C_d is 450 pF at f = 1 MHz and V_R = 0 V, as specified in Table 8 for all BZT52H-A/B/C2V4–C24 types including BZT52H-B3V3. This value remains stable across the 3.3 V variant's operating range and impacts high-frequency noise filtering and transient response in clamping applications.