Nexperia USA Inc. BZB784-C2V7-QX

Overview

BZB784-C2V7-Q from Nexperia is a dual Zener voltage regulator diode in SOT323 (SC-70) package, configured as two cathodes sharing a common anode. It delivers 2.7 V nominal regulation with ±5% tolerance, 20 µA reverse current at VR = 1 V, and supports up to 200 mA forward current - used for precision low-voltage biasing and ESD protection in automotive sensor interfaces.

For engineers reviewing the BZB784-C2V7-Q datasheet, BZB784-C2V7-Q pinout, BZB784-C2V7-Q application, or BZB784-C2V7-Q equivalent, this device is selected for dual-rail clamping, low-power voltage reference generation, and AEC-Q101-compliant transient suppression where space-constrained SOT323 packaging and matched dual-Zener characteristics are required.

Technical Context

This dual-Zener diode integrates two independent 2.7 V Zener elements sharing a common anode terminal, enabling symmetrical bidirectional clamping or independent low-voltage regulation paths. Its differential resistance is 300 Ω (typ.) at IZ = 5 mA, and temperature coefficient is −1.4 mV/K - optimized for stable operation across −55 °C to +150 °C ambient range.

Qualified per AEC-Q101, it sustains non-repetitive peak reverse power of 40 W (tp = 100 µs), with total power dissipation limited to 350 mW (2 diodes loaded on FR4 PCB). Junction-to-solder-point thermal resistance is 140 K/W when both diodes are active, supporting reliable thermal performance in automotive under-hood modules.

Key Specifications

Pinout & Package

SOT323 (SC-70) plastic surface-mounted package with 3 leads, 1.3 mm pitch, and standard FR4-compatible reflow footprint (2.65 mm × 2.35 mm solder land area).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DMN2026LSD-13 and BZX84-C2V7,215, the BZB784-C2V7-Q uniquely provides matched dual-Zener regulation in one SOT323 package, reducing component count, improving thermal tracking, and enabling compact bidirectional ESD protection - critical for automotive domain controllers and space-limited industrial sensors.

Availability

BZB784-C2V7-Q is available at Aetrix Electronics and suitable for automotive sensor interfaces, low-voltage reference generation, and industrial IO module clamping requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZB784-C2V7-Q 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 leading global semiconductor expert delivering high-performance logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for automotive, industrial, and consumer markets.

The BZB784-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation and transient protection in harsh automotive environments - emphasizing matched dual-element performance and SC-70 space efficiency.

FAQ

What is the maximum continuous forward current rating for BZB784-C2V7-Q?

The absolute maximum forward current is 200 mA per diode, as specified in Table 5 of the datasheet under "Limiting values." This rating applies at Tamb = 25 °C on FR4 PCB with single-sided copper. Derating is required above 25 °C ambient, following the thermal resistance curve in Table 6.

Can BZB784-C2V7-Q be used for bidirectional ESD protection on a single signal line?

Yes - connect the signal line to both K1 and K2, and tie CA to ground. This configures the device as a symmetrical ±2.7 V clamp, providing equal positive and negative ESD current paths with matched Zener characteristics and thermal coupling.

How does the −1.4 mV/K temperature coefficient affect regulation accuracy over temperature?

At 2.7 V nominal, −1.4 mV/K translates to ~−0.052%/°C drift. Over −40 °C to +125 °C (165 K span), total shift is ~−231 mV - resulting in regulation range of ~2.47 V to 2.93 V. This is within the ±5% initial tolerance band and remains suitable for non-critical biasing and clamping functions.

Is the common anode (CA) pin internally bonded to both Zener dies?

Yes - the CA pin is the sole anode connection for both integrated Zener diodes, confirmed by the simplified outline in Table 2 and the internal schematic implied by the "common anode" designation and dual-cathode pinning. No internal separation exists between the anode regions of the two diodes.