Diodes Incorporated DDZ2V4BSF-7

Overview

DDZ2V4BSF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode with nominal zener voltage 2.53 V (min 2.43 V, max 2.63 V) at 20 mA test current, 20 Ω dynamic impedance, and 1 µA reverse leakage at 1 V. It delivers tight voltage tolerance for voltage reference and regulation in low-power analog circuits, including sensor biasing and ADC reference stabilization.

For engineers reviewing the DDZ2V4BSF-7 datasheet, DDZ2V4BSF-7 pinout, DDZ2V4BSF-7 application, or DDZ2V4BSF-7 equivalent, this device is selected for stable low-voltage reference generation where ±4% V_Z tolerance, SOD323F thermal performance (R_θJA = 250 °C/W), and automotive-grade process control are critical.

Technical Context

This Zener diode operates in reverse breakdown to maintain a stable reference voltage across its cathode–anode terminals. Its 20 mA zener test current and 20 Ω impedance ensure predictable regulation under moderate load variations, while the 1 µA reverse leakage at 1 V supports low-quiescent-current designs.

The device uses a silicon planar Zener structure optimized for tight V_Z distribution and low temperature coefficient - typical TC near −2 mV/°C for 2.5 V-class devices per Figure 3 - and is qualified for automated SMT assembly on FR-4 PCBs with 10 mm × 10 mm copper pads.

Key Specifications

Pinout & Package

Package: SOD323F - ultra-compact surface-mount plastic package with molded "green" compound (UL 94V-0), 0.004 g mass, and matte tin–annealed copper alloy leadframe. Cathode identified by band marking on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B2V4 and MMSZ4678T1G, DDZ2V4BSF-7 offers superior regulation accuracy (20 Ω vs. 25–100 Ω), higher power headroom (500 mW), and tighter V_Z distribution - making it optimal for space-constrained, high-stability analog references.

Availability

DDZ2V4BSF-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, portable medical device reference, automotive cabin control panels, and IoT node power management requiring stable component supply and long-term traceability.

Supply support for DDZ2V4BSF-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, specializing in high-reliability components for industrial, automotive, and consumer markets with ISO/TS 16949 and IATF 16949 certified facilities.

This device belongs to the DDZxx(x)SF precision Zener series, engineered for low-voltage reference stability in automated SMT environments where tight V_Z tolerance, low leakage, and green packaging are mandatory.

FAQ

What is the maximum continuous power dissipation for DDZ2V4BSF-7 on a standard FR-4 PCB?

The DDZ2V4BSF-7 is rated for 500 mW maximum power dissipation when mounted on an FR-4 PCB with a 10 mm × 10 mm copper pad and board dimensions of 35 mm × 25 mm. Derating begins above +25°C ambient per Figure 1, reaching 200 mW at +70°C and 0 mW at +150°C.

How does the zener voltage tolerance affect calibration in ADC reference applications?

With a guaranteed V_Z range of 2.43–2.63 V (±4%), the DDZ2V4BSF-7 introduces up to ±4% full-scale error in a ratiometric ADC system. For 12-bit accuracy, this corresponds to ~164 LSBs - acceptable for non-critical sensing but may require one-time digital calibration in high-precision implementations.

Can DDZ2V4BSF-7 be used in forward-bias mode, and what is its forward voltage behavior?

Yes - the device exhibits 0.9 V forward voltage at 10 mA, with typical forward characteristics stable from −65°C to +150°C (Figure 2). This enables dual-use as a low-V_F clamp or ESD protection element in addition to reverse-bias reference operation.

Is DDZ2V4BSF-7 qualified for automotive applications, and what certifications apply?

DDZ2V4BSF-7 is manufactured in IATF 16949 certified facilities and supports PPAP documentation. While not individually AEC-Q101 qualified, Diodes states that automotive-grade change control (including AEC-Q200 stress testing) is available upon request - confirm qualification status with Diodes' automotive team before deployment in safety-critical systems.