Diodes Incorporated DDZ6V2BQ-7

Overview

DDZ6V2BQ-7 from Diodes Incorporated is a precision Zener diode in SOD123 package, designed for voltage regulation and reference applications with tight 5.96–6.27 V zener voltage tolerance at 20 mA test current, 7 Ω maximum zener impedance, and 0.5 µA maximum reverse leakage at 4.0 V. It serves as a stable voltage reference in power supply feedback loops, analog sensor biasing, and overvoltage protection circuits.

For engineers reviewing the DDZ6V2BQ-7 datasheet, DDZ6V2BQ-7 pinout, DDZ6V2BQ-7 application, or DDZ6V2BQ-7 equivalent, key selection criteria include zener voltage accuracy, low dynamic impedance, AEC-Q101 qualification for automotive use, thermal resistance (425 °C/W on minimal pad), and SOD123 footprint compatibility with automated assembly.

Technical Context

This device operates in reverse breakdown mode to maintain a stable reference voltage under varying load and temperature conditions. Its 6.2 V nominal zener voltage falls in the optimal range for low-drift, low-noise voltage references where temperature coefficient is minimized - typical TC is +0.03 %/°C near 6.2 V per Figure 16.

The diode features a single-junction silicon structure with cathode band marking, matte tin–annealed terminals, and green molding compound compliant with RoHS 3 and halogen-free standards. It is rated for 294 mW power dissipation on minimal PCB pad layout and 470 mW on 1-in² copper area.

Key Specifications

Pinout & Package

Package: SOD123 - molded plastic case with cathode band marking; dimensions: 1.55 mm (D) × 2.65 mm (E) × 0.30 mm (L); weight ≈ 0.01 g; moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision Zener reference applications.

Compared with BZX84-C6V2-7-F and MMSZ4687-TP, DDZ6V2BQ-7 delivers superior voltage accuracy, lower dynamic impedance, and guaranteed automotive qualification - making it the only choice for safety-critical or high-reliability applications demanding long-term stability and traceable process control.

Availability

DDZ6V2BQ-7 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor signal conditioning, medical patient monitor power rails, and telecom DC-DC converter feedback requiring stable component supply with full AEC-Q101 traceability.

Supply support for DDZ6V2BQ-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The DDZ series targets high-precision, high-reliability voltage reference needs in automotive, industrial, and medical systems - emphasizing tight V_Z tolerance, low Z_ZT, and AEC-Q101-compliant manufacturing.

FAQ

What is the maximum reverse voltage (V_R) that DDZ6V2BQ-7 can withstand before breakdown?

DDZ6V2BQ-7 begins controlled reverse breakdown at its specified zener voltage range of 5.96–6.27 V when tested at 20 mA. Below this threshold - specifically at V_R = 4.0 V - reverse leakage is guaranteed ≤0.5 µA. Operation above 6.27 V is permissible only within its 294 mW power limit and thermal derating curve; sustained voltage beyond 6.8 V risks exceeding safe operating area.

Is DDZ6V2BQ-7 compatible with lead-free reflow profiles?

Yes. DDZ6V2BQ-7 features matte tin–annealed terminals over Alloy 42 leadframe and is fully compatible with IPC/JEDEC J-STD-020 Class 3 lead-free reflow profiles. Its moisture sensitivity level is rated at Level 1, eliminating bake requirements prior to assembly. The green molding compound meets UL 94V-0 flammability and RoHS 3 compliance.

How does the temperature coefficient affect regulation accuracy over -40°C to +125°C?

At 6.2 V, DDZ6V2BQ-7 exhibits a typical temperature coefficient of +0.03 %/°C (Figure 16), translating to ±3.75 mV/°C drift. Over the full -40°C to +125°C range, total V_Z shift is approximately ±0.62 V - well within its initial ±2.6% tolerance band. This behavior is confirmed by characterization data across the DDZ5V1B–DDZ10C family.

Can DDZ6V2BQ-7 replace TL431 in shunt regulator configurations?

Yes, but with design adjustments: DDZ6V2BQ-7 provides fixed 6.2 V reference versus TL431's adjustable 2.5 V output. To replicate TL431 functionality, use it in series with a resistor divider to set higher output voltages, or pair it with an op-amp buffer for low-output-impedance applications. Its 7 Ω Z_ZT supports comparable transient response in properly biased configurations.