Diodes Incorporated DZ23C51-7-F

Overview

DZ23C51-7-F from Diodes Incorporated is a dual common-cathode 51 V ±6% Zener diode pair in SOT23 package, rated for 300 mW total power dissipation, with matched voltage tolerance (ΔV_Z ≤ 5%), 750 Ω maximum Zener impedance at 1 mA, and +0.11 %/°C temperature coefficient - used for precision voltage reference and overvoltage clamping in DC power rail monitoring circuits.

For engineers reviewing the DZ23C51-7-F datasheet, DZ23C51-7-F pinout, DZ23C51-7-F application, or DZ23C51-7-F equivalent, key selection criteria include dual-Zener matching tolerance, low thermal resistance (417 °C/W), JEDEC-qualified reliability, SOT23 automated assembly compatibility, and reverse leakage <0.1 µA at 38 V.

Technical Context

This dual Zener operates in common-cathode configuration: Pins 1 and 2 are anodes of two independent 48–54 V Zener elements sharing Pin 3 as cathode. Each diode is characterized at I_ZT = 5 mA (V_Z = 48–54 V) and I_ZK = 1 mA (Z_ZK = 750 Ω max), with specified TC of +0.11 %/°C and minimum reverse voltage of 38 V.

Thermal derating begins at 25 °C ambient, with linear reduction to zero power at 150 °C junction temperature. The device meets JEDEC high-reliability standards and is qualified for commercial-grade operation across –65 °C to +150 °C storage and operating range.

Key Specifications

Pinout & Package

Package: SOT23 - molded plastic case, 0.008 g weight, UL 94V-0 flammability rating, matte tin-plated terminals, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B51,115, DZ23C51-7-F delivers integrated dual-rail clamping without layout penalty; versus DZ23C51Q-7-F, it offers identical performance at lower cost for non-automotive industrial use where AEC-Q200 is not mandated.

Availability

DZ23C51-7-F is available at Aetrix Electronics and suitable for industrial power monitoring, automotive body control modules, medical sensor signal conditioning, and telecom DC-DC converter feedback requiring stable component supply with full traceability and lifecycle management.

Supply support for DZ23C51-7-F 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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with design, manufacturing, and distribution operations across Asia, the Americas, and Europe.

DZ23C51-7-F belongs to the DZ23C series of dual common-cathode Zener diodes engineered for high-precision voltage referencing and overvoltage protection in space-constrained, high-reliability applications.

FAQ

What is the maximum continuous Zener current for DZ23C51-7-F at 25°C ambient?

At 25°C ambient, the maximum continuous Zener current is calculated from P_D = 300 mW and V_Z ≈ 51 V, yielding I_Z(max) ≈ 5.88 mA. Derating applies above 25°C per Fig. 1: at 85°C ambient, max current drops to ~3.5 mA. Operation beyond these limits risks thermal instability and parametric shift.

Can DZ23C51-7-F be used in series or parallel configurations with other Zeners?

No - DZ23C51-7-F integrates two Zeners in fixed common-cathode topology; pins 1 and 2 are isolated anodes sharing pin 3. Series connection would short one element; parallel use of both anodes defeats the matched ΔV_Z benefit. External dual-Zener ICs like TL431 are required for programmable configurations.

Is the 5% ΔV_Z tolerance guaranteed per unit or lot-average?

The ≤5% ΔV_Z is guaranteed per individual device, measured at I_ZT = 5 mA on both elements during final test. This is verified unit-by-unit in production, not a statistical lot average, ensuring every shipped DZ23C51-7-F meets the matching spec without binning.

Does DZ23C51-7-F support reflow soldering per J-STD-020?

Yes - DZ23C51-7-F is rated for moisture sensitivity level 1 and qualified for standard Pb-free reflow profiles (peak 260°C, 30 sec max). Its SOT23 package withstands JEDEC J-STD-020D.3 conditions, including preheat (150–200°C), soak (150–200°C for 60–120 sec), and reflow (235–260°C peak).