onsemi MM5Z22V

Overview

MM5Z22V from ON Semiconductor (formerly Fairchild) is a surface-mount Zener diode designed for precision voltage regulation and overvoltage protection in low-power circuits. It delivers a nominal Zener voltage of 22 V at 5 mA test current, with ±5% tolerance (20.8–23.3 V), 55 Ω dynamic impedance at I_ZT, and 200 mW power dissipation in the ultra-compact SOD-523F package - ideal for space-constrained consumer and portable electronics.

For engineers reviewing the MM5Z22V datasheet, pinout, applications, or equivalent options, key selection criteria include its 22 V regulation accuracy, low-profile 0.7 mm height, moisture sensitivity level 1 rating, RoHS-compliant matte tin finish, and cathode band marking - all critical for high-density PCB layout and industrial-grade reliability validation.

Technical Context

The MM5Z22V operates as a two-terminal voltage reference device relying on reverse-biased Zener breakdown. Its electrical behavior is defined by tightly controlled V_Z (20.8–23.3 V), low Z_ZT (55 Ω), and minimal leakage current (≤0.05 µA at 15.4 V). Thermal resistance is specified at 500 °C/W (junction-to-ambient), requiring careful thermal management on FR-4 PCBs with minimum land pads.

It features a flat lead, green mold compound SOD-523F package compliant with JEITA SC79, rated for -55 to +150 °C operating and storage temperature ranges. The cathode is unambiguously marked by a band, ensuring correct polarity during automated placement and manual inspection.

Key Specifications

Pinout & Package

SOD-523F is a 2-lead, cathode-band-marked surface-mount package. Total height is under 0.70 mm, with standardized JEITA SC79 outline dimensions optimized for high-density routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584C22 and MMSZ5247B, the MM5Z22V offers the lowest profile (0.7 mm), tightest Z_ZT at standard 5 mA test condition, and Level 1 moisture sensitivity - making it optimal for miniaturized, high-volume consumer designs where assembly simplicity and board real estate are constrained.

Availability

MM5Z22V is available at Aetrix Electronics and suitable for USB protection, IoT sensor references, industrial PLC inputs, and LED driver feedback circuits requiring stable component supply, full traceability, and long-term lifecycle assurance.

Supply support for MM5Z22V 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

ON Semiconductor (formerly Fairchild Semiconductor) is a global supplier of energy-efficient semiconductor solutions, serving automotive, industrial, cloud power, and IoT markets with discrete, analog, and power management devices.

The MM5Z22V belongs to the MM5Z2V4–MM5Z75V Zener diode family, engineered specifically for compact, high-reliability voltage regulation in space- and power-sensitive applications - emphasizing manufacturability, environmental compliance, and parametric consistency.

FAQ

What is the Zener voltage tolerance of MM5Z22V?

The MM5Z22V has a nominal Zener voltage of 22 V with a tolerance of ±5%, resulting in a guaranteed range of 20.8 V to 23.3 V at 5 mA test current (I_ZT). This specification is verified per the official ON Semiconductor datasheet Rev. 1.5 and applies strictly to the MM5Z22V part number under standard test conditions (T_A = 25 °C, pulse duration 10 ms).

Does MM5Z22V require baking before reflow soldering?

No, the MM5Z22V does not require baking prior to reflow. It is rated Moisture Sensitivity Level 1 (MSL-1) per J-STD-020, meaning it can be stored indefinitely at ≤30 °C/60% RH and subjected directly to standard lead-free reflow profiles without preconditioning. This simplifies manufacturing for the MM5Z22V and reduces process overhead.

What is the maximum reverse leakage current for MM5Z22V?

The MM5Z22V exhibits a maximum reverse leakage current (I_R) of 0.05 µA at V_R = 15.4 V, as specified in the official datasheet. This ultra-low leakage supports energy-sensitive applications such as battery-powered IoT nodes, where standby current must remain below 100 nA - a key design advantage of the MM5Z22V over higher-leakage alternatives.

Is MM5Z22V pin-compatible with other SOD-523F Zener diodes?

Yes, the MM5Z22V uses the standard SOD-523F package with identical mechanical footprint and pinout (anode/cathode orientation) as all other SOD-523F Zeners, including BZX584C22 and NSZ5V1. However, electrical parameters - especially V_Z, Z_ZT, and P_D - differ between part numbers, so functional substitution requires verification against circuit requirements for the MM5Z22V's specific 22 V, 55 Ω, 200 mW profile.

What is the thermal resistance of MM5Z22V?

The MM5Z22V has a junction-to-ambient thermal resistance (R_JA) of 500 °C/W when mounted on an FR-4 PCB with minimum land pad area. This value assumes no additional copper pour or thermal vias; actual R_JA improves with enhanced PCB thermal design. Engineers must apply this R_JA to calculate junction temperature rise in the MM5Z22V under worst-case power dissipation to ensure operation within -55 to +150 °C limits.