Nexperia USA Inc. BZB84-C36-QR

Overview

BZB84-C36-QR from Nexperia is a dual common-anode Zener diode pair in SOT23 package, rated for 36 V nominal Zener voltage (±5 % tolerance), 300 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It provides precision voltage regulation and overvoltage clamping in compact space-constrained circuits such as ECU power rail supervisors and sensor bias networks.

For engineers reviewing the BZB84-C36-QR datasheet, BZB84-C36-QR pinout, BZB84-C36-QR application, or BZB84-C36-QR equivalent, this page delivers verified electrical parameters, automotive-grade thermal performance, dual-diode configuration details, and real-world design context for voltage reference and transient suppression roles.

Technical Context

This dual-Zener device integrates two independent Zener diodes sharing a common anode (Pin 3), enabling bidirectional voltage clamping or dual-rail reference generation from a single footprint. Each diode supports 200 mA forward current and withstands 40 W non-repetitive peak reverse power at 100 µs pulse width.

Its ±5 % voltage tolerance (C-series), 350 Ω typical differential resistance at I_Z = 2 mA, and 0.05 µA max reverse leakage at V_R = 28.8 V (80 % of V_Z) ensure stable regulation under varying load and temperature conditions in automotive ambient ranges (−55 °C to +150 °C).

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with gull-wing leads; optimized for reflow soldering per IPC-7095 guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5226BS and BZX84-C36-TP, BZB84-C36-QR uniquely delivers dual 36 V Zener functions in one AEC-Q101-qualified SOT23 package, reducing component count by 50 % and eliminating inter-device parameter mismatch in automotive power supervision circuits.

Availability

BZB84-C36-QR is available at Aetrix Electronics and suitable for automotive ECU power supervision, sensor biasing, LIN bus protection, and infotainment power sequencing requiring stable component supply and full AEC-Q101 traceability.

Supply support for BZB84-C36-QR 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 logic, discrete, and MOSFET solutions, with leadership in automotive-qualified components.

The BZB84-Q series belongs to Nexperia's automotive Zener diode product line, engineered specifically for voltage regulation and transient protection in harsh-environment vehicle electronics where AEC-Q101 compliance and thermal robustness are mandatory.

FAQ

What is the maximum non-repetitive peak reverse current for BZB84-C36-QR?

The maximum non-repetitive peak reverse current is 0.8 A at t_p = 100 µs, derived from the 40 W peak power rating and 36 V nominal Zener voltage (I_ZSM = P_ZSM/V_Z). This value is confirmed in Table 9 of the datasheet for C-series 36 V devices and applies under square-wave surge conditions with T_j = 25 °C prior to surge.

Can BZB84-C36-QR be used for bidirectional clamping?

Yes - its dual common-anode configuration allows bidirectional clamping by connecting K1 to Node A and K2 to Node B, with CA tied to ground. When Node A exceeds 36 V, D1 conducts; when Node B exceeds 36 V, D2 conducts. This is explicitly supported in the "Dual common anode configuration" feature and pinning diagram (Table 2).

How does the ±5 % tolerance affect regulation accuracy in temperature-sensitive applications?

At I_Z = 2 mA, the temperature coefficient is +25.2 mV/K (typical), meaning V_Z increases ~0.9 V over a 36 °C rise. Combined with ±5 % initial tolerance (±1.8 V), total worst-case drift is ±2.7 V across −40 °C to +125 °C - acceptable for non-precision clamping but not for voltage references requiring < 1 % stability.

Is the SOT23 footprint compatible with standard reflow profiles?

Yes - Nexperia specifies a reflow soldering footprint in Figure 12 (sot23_fr) with 0.6 mm solder land width and 0.7 mm solder paste stencil opening per pin. The device complies with JEDEC J-STD-020 moisture sensitivity level 1 and withstands peak reflow temperatures up to 260 °C for 10 seconds, matching standard lead-free profiles.