NXP Semiconductors BZB84-B30,215

Overview

BZB84-B30,215 from Nexperia is a dual common-anode Zener diode in SOT23 (TO-236AB) package, designed for precision voltage regulation and transient suppression in compact PCB layouts. It delivers nominal 30 V Zener voltage (±2 % tolerance), 300 mW total power dissipation, and 40 W non-repetitive peak reverse power handling - enabling use in automotive body control modules requiring AEC-Q101-qualified overvoltage clamping.

For engineers reviewing the BZB84-B30,215 datasheet, BZB84-B30,215 pinout, BZB84-B30,215 application, or BZB84-B30,215 equivalent, this device supports dual-channel bidirectional voltage reference design, low-capacitance (<50 pF) signal-line protection, and thermally stable operation up to 150 °C junction temperature in space-constrained automotive and industrial systems.

Technical Context

This dual-Zener configuration shares a common anode (Pin 3), with independent cathodes (Pins 1 and 2), allowing simultaneous regulation of two circuits from a single node or differential clamping across complementary signals. Its ±2 % V_Z tolerance and low temperature coefficient (21.0–24.4 mV/K at I_Z = 2 mA) ensure tight voltage stability under varying thermal loads.

The device operates within a wide working voltage range (29.4–30.6 V), exhibits 300 Ω typical differential resistance at 2 mA, and maintains <0.05 µA reverse leakage at 24 V - supporting high-impedance sensing and low-power standby regulation without loading source circuits.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mount package: 3-pin, small outline, lead-free, RoHS-compliant, optimized for reflow soldering on FR4 PCBs with standard footprint (2.8 mm × 1.4 mm × 1.1 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5262BS-7-F and BZX84-C30,215, the BZB84-B30,215 uniquely integrates two ±2 %-tolerant Zeners in one SOT23, reducing component count by 50 % and improving thermal tracking between channels - critical for matched clamping in differential interfaces.

Availability

BZB84-B30,215 is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor signal conditioning, USB-C power delivery protection, and programmable logic controller input stages requiring stable component supply with AEC-Q101 assurance.

Supply support for BZB84-B30,215 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 focused on high-volume, high-reliability essential semiconductors for automotive, industrial, and consumer markets.

The BZB84 series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for space-efficient, thermally robust voltage regulation and transient suppression in harsh-environment electronics.

FAQ

What is the maximum continuous reverse current the BZB84-B30,215 can sustain?

The device has a maximum forward current rating of 200 mA, but for Zener operation, continuous reverse current is limited by thermal dissipation. At 25 °C ambient, sustained I_Z must stay below ~10 mA to remain within the 300 mW total power limit - verified by the 29.4–30.6 V V_Z range and 300 Ω differential resistance at 2 mA.

Can the BZB84-B30,215 be used for bidirectional ESD protection?

No - it is a dual unidirectional Zener (common-anode), not a bidirectional TVS. Each diode conducts only in reverse bias; forward conduction is limited to 0.9 V at 10 mA. For true bidirectional protection, a dedicated bidirectional TVS like PESD5V0S1BA must be used instead.

How does the common-anode configuration affect PCB layout?

The shared anode (Pin 3) simplifies grounding - both Zener cathodes route independently to protected nodes while tying to a single low-impedance ground plane. This avoids ground loops and improves thermal coupling between diodes, enhancing matching during transient events.

Is the 40 W peak power rating per diode or for the entire package?

The 40 W non-repetitive peak reverse power dissipation (P_ZSM) is specified per diode, as confirmed in Table 1 and Section 5 of the datasheet. With two independent Zener junctions, the package can handle up to 40 W on either cathode simultaneously - provided thermal limits (T_j ≤ 150 °C) are maintained via proper PCB copper area.