onsemi SZBZX84C10ET1G

Overview

SZBZX84C10ET1G from onsemi is a 10 V, 250 mW surface-mount Zener diode in SOT-23 package, with nominal Zener voltage of 10.0 V at 5 mA test current, dynamic impedance of 20 Ω at 5 mA, and reverse leakage current ≤0.2 μA at 7.0 V. It provides precision voltage regulation for low-power biasing and reference applications in space-constrained portable electronics.

For engineers reviewing the SZBZX84C10ET1G datasheet, pinout, applications, or equivalent options, this device is selected for stable low-current voltage clamping, ESD-protected signal-level referencing, and automotive-grade power rail monitoring where AEC-Q101 qualification and ±0.6 V Zener tolerance are critical.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage across its cathode-anode terminals. Its 20 Ω dynamic impedance at 5 mA ensures minimal voltage deviation under small-signal load variations, while the −3.5 mV/°C temperature coefficient (at 10 V) enables predictable drift behavior over −65 °C to +150 °C junction range.

The SOT-23 package features a defined pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode), supports automated placement, and delivers 225 W peak pulse power handling per 8 × 20 µs waveform. Its Class 3 HBM ESD rating (>16 kV) and Pb-free RoHS-compliant construction meet stringent reliability requirements for automotive and industrial end equipment.

Key Specifications

Pinout & Package

SOT-23 (TO-236) package: 2.90 mm × 1.30 mm × 1.00 mm body, thermoset plastic case with corrosion-resistant finish, UL 94 V-0 flammability rating, and cathode indicated by polarity band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84C10ET1G and MMSZ5240BT1G, SZBZX84C10ET1G uniquely combines AEC-Q101 qualification, 20 Ω low-impedance regulation, and minimal SOT-23 footprint-making it optimal for automotive and space-constrained industrial designs requiring certified reliability.

Availability

SZBZX84C10ET1G is available at Aetrix Electronics and suitable for automotive sensor modules, portable medical devices, and industrial PLC input stages requiring stable component supply with full lifecycle traceability and long-term obsolescence management.

Supply support for SZBZX84C10ET1G 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

onsemi is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications-with emphasis on functional safety and sustainability.

SZBZX84C10ET1G belongs to the BZX84CxxxET1G/SZBZX84CxxxET1G Zener regulator family, engineered specifically for high-reliability voltage reference and clamping in automotive electronics and compact portable systems.

FAQ

What is the Zener voltage tolerance of SZBZX84C10ET1G at 5 mA test current?

The SZBZX84C10ET1G has a guaranteed Zener voltage range of 9.4 V to 10.6 V at 5 mA (IZT), corresponding to ±6% tolerance around the nominal 10.0 V rating. This specification is validated per onsemi's production test flow and applies across the full operating temperature range of −65 °C to +150 °C junction temperature. The SZBZX84C10ET1G datasheet confirms this in Table 1 on page 2 under "VZ1 (V) @ IZT1 = 5 mA".

Does SZBZX84C10ET1G have a no-connect pin, and how must it be handled on the PCB?

Yes, SZBZX84C10ET1G has Pin 2 designated as "No Connection" per the official marking diagram and mechanical outline (Style 8). This terminal is internally unconnected and must remain electrically floating-no trace, via, or copper pour may contact Pin 2 on the PCB. Improper connection risks parametric shift or premature failure. The SZBZX84C10ET1G pinout is explicitly defined in the datasheet on page 2 and page 6.

Is SZBZX84C10ET1G qualified for automotive use, and what standards does it meet?

Yes, SZBZX84C10ET1G is AEC-Q101 qualified and PPAP capable, as stated in the "Specification Features" section of the onsemi datasheet. It meets stress test requirements for temperature cycling, humidity bias, mechanical shock, and ESD (Class 3, >16 kV HBM). The "SZ" prefix denotes automotive and other applications requiring unique site and control change requirements-distinct from the commercial-grade BZX84C10ET1G variant.

What is the maximum continuous power dissipation for SZBZX84C10ET1G on a standard FR-5 PCB?

SZBZX84C10ET1G is rated for 250 mW total power dissipation on FR-5 board at TA = 25 °C, with derating of 2.0 mW/°C above that ambient temperature. This value is specified in the "Maximum Ratings" table on page 1 of the datasheet under "Total Power Dissipation on FR−5 Board." Exceeding this limit risks thermal runaway or accelerated parameter drift, especially given its 500 °C/W junction-to-ambient thermal resistance.

How does the temperature coefficient of SZBZX84C10ET1G affect its performance in wide-temperature applications?

The SZBZX84C10ET1G exhibits a temperature coefficient of −3.5 mV/°C at 5 mA, meaning its Zener voltage decreases by approximately 3.5 mV per degree Celsius rise in junction temperature. Over a −40 °C to +125 °C ambient range, this results in ~575 mV total drift-critical for precision references. Designers must compensate using TC-matched components or calibration; the SZBZX84C10ET1G datasheet provides TC curves in Figure 1 on page 4.