Nexperia USA Inc. BZB84-C33,215

Overview

BZB84-C33,215 from Nexperia is a dual common-anode Zener diode in SOT23 package, designed for precision voltage regulation and overvoltage protection in compact DC power rails. It delivers nominal 33 V Zener voltage (±5 % tolerance), 300 mW total power dissipation, 45 Ω typical differential resistance at I_Z = 2 mA, and AEC-Q101 qualification for automotive-grade reliability - deployed in engine control unit (ECU) sensor biasing and CAN transceiver supply clamping.

For engineers reviewing the BZB84-C33,215 datasheet, BZB84-C33,215 pinout, BZB84-C33,215 application, or BZB84-C33,215 equivalent, this page provides verified electrical parameters, validated dual-diode terminal mapping, automotive-qualified thermal limits, and real-world use cases in rail stabilization and transient suppression - all derived from Nexperia's official Rev. 03 product data sheet.

Technical Context

This dual Zener operates with shared anode (Pin 3) and independent cathodes (Pins 1 & 2), enabling bidirectional voltage clamping or dual-rail reference generation without external interconnects. Its ±5 % V_Z tolerance (31.0 V to 35.0 V), low 0.9 V forward voltage at 10 mA, and 23.1 mV/K temperature coefficient at I_Z = 2 mA support stable regulation across −55 °C to +150 °C ambient.

The device sustains non-repetitive 40 W peak reverse power (100 µs square wave, T_j = 25 °C) and 0.90 A peak reverse current, while maintaining 325 Ω max differential resistance and ≤0.05 µA reverse leakage at V_R = 25.4 V - critical for low-power sensor interface protection where leakage-induced offset must be minimized.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mount package: 3-pin, 1.3 mm × 2.9 mm footprint, 1.1 mm height, tin-plated leads compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZB84-B33,215, the C-tolerance version trades 0.4 V regulation window for lower cost and broader acceptance in non-critical rails; versus MMBZ5267BS-7-F, it delivers true dual-channel integration in half the footprint with no layout penalty.

Availability

BZB84-C33,215 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input stages, and DC-DC converter feedback networks requiring stable component supply, AEC-Q101 compliance, and SOT23 space constraints.

Supply support for BZB84-C33,215 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 essential efficiency technologies - delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.

The BZB84 series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for robust voltage regulation and transient protection in harsh-environment electronics where long-term parametric stability is mandatory.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The absolute maximum junction temperature is 150 °C, as specified in Table 5 of the Nexperia datasheet. Continuous operation above this limit risks irreversible degradation of Zener characteristics and bond wire integrity. Derating begins at T_amb >25 °C per R_th(j-a) = 417 K/W - e.g., at 85 °C ambient, max continuous power drops to ~175 mW.

Can BZB84-C33,215 replace two separate 33 V Zeners in a circuit?

Yes - its dual common-anode structure replaces two discrete Zeners with identical V_Z, eliminating one solder joint and reducing PCB area by ~40 %. However, both cathodes must be driven independently; shared cathode configurations require redesign. Pin 3 must connect to system ground or reference potential.

How does the ±5 % tolerance affect regulation accuracy in a 24 V automotive system?

At nominal 33 V, ±5 % yields a 31.0–35.0 V window - sufficient for clamping 24 V rail transients up to 36 V (e.g., ISO 7637-2 Pulse 5a). For precision references, pair with a low-drift op-amp buffer; for protection, the window ensures reliable triggering without false trips during normal battery fluctuations (11–14.5 V).

Is thermal resistance measured per diode or for the entire package?

R_th(j-a) = 417 K/W and R_th(j-sp) = 100 K/W (Table 6) apply per diode under single-diode loading conditions. When both diodes conduct simultaneously, total power dissipation remains ≤300 mW but localized junction heating increases - derate total P_tot by 15 % for simultaneous conduction to maintain T_j <150 °C.