Diodes Incorporated BZT52HC6V8WF-7

Overview

BZT52HC6V8WF-7 from Diodes Incorporated is a surface-mount Zener diode with nominal zener voltage 6.8 V (6.4–7.2 V range), 5 mA test current, 8 Ω maximum zener impedance at I_ZT, and ±1.2 to +4.5 mV/°C temperature coefficient. It delivers stable voltage regulation in low-power biasing and reference circuits, especially in automotive body control modules where AEC-Q101 qualification ensures reliability under thermal cycling and vibration.

For engineers reviewing the BZT52HC6V8WF-7 datasheet, BZT52HC6V8WF-7 pinout, BZT52HC6V8WF-7 application, or BZT52HC6V8WF-7 equivalent, key selection criteria include its SOD123F package footprint, 375 mW power dissipation on standard FR-4, 200 pF capacitance at 0 V, and cathode-band polarity marking for unambiguous orientation during automated placement.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage across its terminals. Its low dynamic impedance (8 Ω @ 5 mA) enables tight regulation under varying load conditions, while the positive temperature coefficient (+1.2 to +4.5 mV/°C) supports compensation in multi-device bias networks.

The device uses a planar epitaxial construction with matte tin–annealed copper alloy leadframe, achieving 0.015 g mass and UL 94V-0 flammability rating. Thermal resistance is 330 °C/W on minimal pad layout and improves to 150 °C/W with 1 cm² cathode pad - critical for sustained 250 mA forward surge capability.

Key Specifications

Pinout & Package

Package: SOD123F (Type B), flat-lead, low-profile surface-mount package with cathode band marking. Dimensions: 1.80 mm × 2.70 mm × 1.15 mm (L × W × H), 0.015 g weight, UL 94V-0 rated green molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ5235B-TP and BZX84-C6V8, BZT52HC6V8WF-7 offers superior thermal performance (375 mW vs. ≤250 mW), automotive qualification, and lowest zener impedance - making it optimal for high-reliability, space-constrained, and thermally demanding applications.

Availability

BZT52HC6V8WF-7 is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor transmitters, consumer power adapter feedback circuits, and medical diagnostic equipment requiring stable component supply and AEC-Q101 assurance.

Supply support for BZT52HC6V8WF-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 and manufacturing operations across Asia and the Americas.

The BZT52HC series belongs to Diodes' AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive and industrial voltage reference and overvoltage protection applications demanding high reliability and consistent parametric performance.

FAQ

What is the maximum reverse working voltage for BZT52HC6V8WF-7?

The maximum reverse working voltage is defined by the zener voltage range: 6.4 V to 7.2 V at 5 mA test current. Operation above 7.2 V risks exceeding specified regulation tolerance and may increase power dissipation beyond safe limits, especially at elevated temperatures where thermal derating applies.

Can BZT52HC6V8WF-7 be used in parallel for higher power handling?

No - Zener diodes exhibit negative temperature coefficients in parallel configurations, causing current hogging and thermal runaway. For higher power, use a single larger-package Zener or an active regulator; parallel operation is not recommended even with ballast resistors due to mismatched TC and Z_Z.

Is the SOD123F package compatible with standard reflow profiles?

Yes - the SOD123F package is qualified for Pb-free reflow per J-STD-020, with peak temperature up to 260°C. Its matte tin–annealed leadframe ensures wetting compatibility with SAC305 and SnPb pastes, and moisture sensitivity Level 1 eliminates pre-bake requirements.

How does the temperature coefficient affect long-term stability in precision references?

The +1.2 to +4.5 mV/°C coefficient causes ~27 mV drift over a 60°C range (−40°C to +125°C). In precision designs, this is mitigated by pairing with complementary TC components (e.g., NTC thermistors) or using trimmed references; standalone use is appropriate for non-critical biasing where ±0.4% drift is acceptable.