onsemi MM5Z27VT1

Overview

MM5Z27VT1 from onsemi is a 27 V, 100 mW surface-mount Zener diode in SOD−523 package, with nominal Zener voltage 27 V (min 25.1 V, max 28.9 V) at 2 mA test current, 80 Ω dynamic impedance at IZT, and 0.05 µA reverse leakage at 21.4 V. It provides precision voltage regulation in space-constrained portable electronics.

For engineers reviewing the MM5Z27VT1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal limits, ESD robustness (Class 3, >16 kV HBM), package dimensions, and real-world use context for board-level protection and reference design.

Technical Context

The MM5Z27VT1 operates as a two-terminal voltage reference device, conducting in reverse bias above its specified Zener breakdown threshold. Its 27 V nominal regulation point is stabilized by silicon junction physics under controlled test conditions (IZT = 2 mA, TA = 25°C).

It exhibits a positive temperature coefficient of +0.0214 %/°C (21.4 mV/°C), low capacitance (70 pF at 0 V, 1 MHz), and meets MSL 1 reflow requirements (260°C peak). The SOD−523 package enables high-density placement without compromising thermal derating up to 150°C junction temperature.

Key Specifications

Pinout & Package

SOD−523 plastic surface-mount package with void-free epoxy (UL 94 V−0), matte tin lead finish, and MSL 1 qualification. Mounting position unrestricted.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584C27 and MMSZ5256ET1G, the MM5Z27VT1 offers the smallest footprint and highest ESD rating among 27 V Zeners, making it optimal for consumer portables where board area and handling robustness are critical constraints.

Availability

MM5Z27VT1 is available at Aetrix Electronics and suitable for cellular phone power clamping, wearable sensor reference generation, and industrial PLC input protection requiring stable component supply and consistent parametric performance across production lots.

Supply support for MM5Z27VT1 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 (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud computing, and IoT markets.

The MM5Z27VT1 belongs to the MM5Z series of miniature Zener regulators designed specifically for space-constrained, high-reliability applications in portable and wireless devices where low leakage, tight voltage tolerance, and ESD resilience are mandatory.

FAQ

What is the maximum reverse current (I_ZT) at which MM5Z27VT1 guarantees its nominal 27 V Zener voltage?

The MM5Z27VT1 guarantees its nominal Zener voltage of 27 V (with min/max bounds 25.1 V–28.9 V) at a reverse test current of 2 mA, as specified in the Electrical Characteristics table on page 3 of the official datasheet. This I_ZT value is used for all parameter measurements including Zener impedance and temperature coefficient. Operating outside this condition may shift regulation voltage outside guaranteed limits.

Does MM5Z27VT1 support lead-free reflow soldering, and what is its qualified peak temperature?

Yes, MM5Z27VT1 is qualified for lead-free reflow soldering with a maximum peak temperature of 260°C, meeting JEDEC J-STD-020 MSL 1 requirements. Its matte tin lead finish and thermosetting plastic body ensure reliable solder joint formation without delamination or voiding under standard profile conditions.

Can MM5Z27VT1 be used as a voltage reference in precision analog circuits?

The MM5Z27VT1 provides adequate stability for non-critical analog references (e.g., comparator thresholds or bias points), but lacks the initial tolerance (±3.7% at 27 V), low tempco drift, and long-term stability of bandgap-based references. For precision applications requiring <0.1% accuracy, a dedicated voltage reference IC is recommended instead of MM5Z27VT1.

What is the reverse leakage current of MM5Z27VT1 at 80% of its nominal Zener voltage?

At 21.4 V - which equals 80% of the nominal 27 V Zener voltage - the MM5Z27VT1 exhibits a maximum reverse leakage current of 0.05 µA, as confirmed in the Electrical Characteristics table. This low leakage supports ultra-low-power operation in battery-powered systems where standby current must remain below 100 nA.

Is the SOD−523 package of MM5Z27VT1 compatible with standard 0201 pick-and-place equipment?

Yes, the SOD−523 package of MM5Z27VT1 (1.20 mm × 0.80 mm) is mechanically compatible with standard 0201-capable pick-and-place systems. Its marking "12" and cathode band orientation align with industry-standard vision recognition algorithms, enabling high-yield placement in high-volume manufacturing of compact PCBs.