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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

onsemi MM5Z7V5ST1

Name: MM5Z7V5ST1
Brand: onsemi
SKU: MM5Z7V5ST1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MM5Z7V5ST1

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: SC-79, SOD-523

Datasheet:: MM5Z7V5ST1.pdf

Description:: DIODE ZENER 7.5V 200MW SOD523

Quantity:: RFQ Add To RFQ list

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Inventory:2,880

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Product details

Overview

MM5Z7V5ST1 from onsemi is a 7.5 V ±4.3% Zener diode in SOD−523 package, rated for 200 mW steady-state power dissipation at 25°C with 160 Ω maximum Zener impedance at 5 mA test current and 140 pF capacitance at 0 V/1 MHz. It provides precision voltage regulation in space-constrained portable electronics such as smartphone power rail clamping and USB interface overvoltage protection.

For engineers reviewing the MM5Z7V5ST1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 7.28–7.60 V Zener voltage range at 5 mA, 15 °C/W thermal coefficient, 16 kV HBM ESD rating, low-profile 0.7 mm height, and Pb-free matte tin lead finish compatible with 260°C reflow.

Technical Context

This device operates as a two-terminal shunt voltage regulator, conducting in reverse breakdown to clamp transient overvoltages and stabilize reference nodes. Its design centers on tight V_Z tolerance (±4.3%), low dynamic impedance (160 Ω max at I_ZT), and high ESD robustness (Class 3, >16 kV HBM) for signal line protection in battery-powered systems.

The SOD−523 package enables ultra-compact placement on high-density PCBs, with MSL 1 moisture sensitivity and void-free thermosetting epoxy meeting UL 94 V−0. Thermal resistance is 635 °C/W junction-to-ambient on FR−4 board, requiring derating to 1.5 mW/°C above 25°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	7.28–7.60 V at 5 mA test current - defines precise clamping threshold for 7.5 V nominal rails
Power Dissipation (P_D)	200 mW at 25°C - sets maximum continuous energy handling before thermal runaway
Zener Impedance (Z_ZT)	160 Ω max at I_ZT = 5 mA - ensures stable regulation under dynamic load transients
Capacitance (C)	140 pF max at 0 V, 1 MHz - limits high-frequency signal distortion in data-line protection
ESD Rating	Class 3 (>16 kV HBM) - enables direct integration into unshielded I/O paths without external ESD arrays
Package	SOD−523 (1.20 × 0.80 × 0.70 mm) - fits 0402 footprint area with 30% lower height than SOD−323
Temperature Coefficient	+2.5 mV/°C at 5 mA - predicts +12.5 mV drift over 5°C ambient change near room temperature

Pinout & Package

SOD−523 surface-mount package with cathode marked by band; body dimensions 1.20 mm × 0.80 mm × 0.70 mm; mounting position unrestricted; qualified for 260°C reflow per JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1 (Cathode)	Reverse-biased Zener terminal	Connected to protected node; conducts when voltage exceeds V_Z to shunt fault current
2 (Anode)	Reference/ground return path	Tied to system ground or lowest potential rail; completes current loop during clamping event

Key Features

Feature	Design Value
Tight Zener voltage tolerance	±4.3% (7.28–7.60 V) enables accurate 7.5 V rail monitoring without calibration
Low-profile SOD−523 package	0.7 mm height allows placement under connectors or beneath stacked components
High ESD immunity	16 kV HBM rating eliminates need for discrete TVS in Class A portable I/O designs
Pb-free matte tin finish	RoHS-compliant termination compatible with standard SnPb and lead-free soldering processes
MSL 1 moisture sensitivity	No dry-pack requirement or bake-out needed prior to assembly

Applications

Smartphone Power Rail Clamping	USB 2.0 Data Line Protection
Use Scenario: Clamping 5 V USB power input against surge events during hot-plug or adapter switching. IC Role / Device Role / Timing Role: Shunt regulator placed between VBUS and GND to limit peak voltage to ≤7.6 V. Use Value: Prevents damage to PMIC input stages while maintaining <140 pF loading on supply rail.	Use Scenario: Protecting D+ and D− lines from ESD strikes during cable insertion. IC Role / Device Role / Timing Role: Bidirectional clamping diode pair (anode-cathode tied) referenced to common-mode voltage. Use Value: 16 kV HBM rating meets IEC 61000-4-2 Level 4 without degrading 480 Mbps signal integrity.
Wearable Sensor Reference Stabilization	IoT Node Battery Monitoring
Use Scenario: Providing stable 7.5 V reference for ADC biasing in compact health monitors. IC Role / Device Role / Timing Role: Precision Zener used as voltage reference in ratiometric sensor excitation circuit. Use Value: ±4.3% V_Z tolerance and +2.5 mV/°C TC enable sub-1% measurement accuracy across 0–50°C.	Use Scenario: Monitoring Li-ion cell stack voltage in multi-cell battery packs. IC Role / Device Role / Timing Role: Overvoltage clamp on battery sense line to protect microcontroller ADC input. Use Value: 200 mW power rating supports sustained 10 mA fault current without thermal failure during overcharge events.

Smartphone Power Rail Clamping

USB 2.0 Data Line Protection

Use Scenario: Clamping 5 V USB power input against surge events during hot-plug or adapter switching.

IC Role / Device Role / Timing Role: Shunt regulator placed between VBUS and GND to limit peak voltage to ≤7.6 V.

Use Value: Prevents damage to PMIC input stages while maintaining <140 pF loading on supply rail.

Use Scenario: Protecting D+ and D− lines from ESD strikes during cable insertion.

IC Role / Device Role / Timing Role: Bidirectional clamping diode pair (anode-cathode tied) referenced to common-mode voltage.

Use Value: 16 kV HBM rating meets IEC 61000-4-2 Level 4 without degrading 480 Mbps signal integrity.

Wearable Sensor Reference Stabilization

IoT Node Battery Monitoring

Use Scenario: Providing stable 7.5 V reference for ADC biasing in compact health monitors.

IC Role / Device Role / Timing Role: Precision Zener used as voltage reference in ratiometric sensor excitation circuit.

Use Value: ±4.3% V_Z tolerance and +2.5 mV/°C TC enable sub-1% measurement accuracy across 0–50°C.

Use Scenario: Monitoring Li-ion cell stack voltage in multi-cell battery packs.

IC Role / Device Role / Timing Role: Overvoltage clamp on battery sense line to protect microcontroller ADC input.

Use Value: 200 mW power rating supports sustained 10 mA fault current without thermal failure during overcharge events.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX584C7V5	Same 7.5 V nominal, but SOD-323 package (1.7 × 1.3 × 1.1 mm); 300 mW P_D; 100 Ω Z_ZT	Larger footprint and higher power handling; less suitable for ultra-thin wearables	Select when higher surge energy absorption is required and board space permits larger package
MMSZ5236B	SOD-123 package (3.7 × 1.6 × 1.1 mm); 500 mW P_D; ±5% V_Z tolerance; 100 Ω Z_ZT	Lower density fit; better thermal performance; not suitable for 0402-area layouts	Choose for industrial environments requiring higher reliability margin and easier hand-soldering

Compared with BZX584C7V5 and MMSZ5236B, MM5Z7V5ST1 offers the smallest footprint and lowest profile for space-critical consumer designs, trading off some power handling and impedance for miniaturization-ideal where PCB real estate is constrained and 200 mW clamping suffices.

Availability

MM5Z7V5ST1 is available at Aetrix Electronics and suitable for smartphone power rail clamping, USB 2.0 data line protection, and wearable sensor reference stabilization requiring stable component supply and consistent Pb-free compliance.

Supply support for MM5Z7V5ST1 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, and IoT applications.

The MM5Z series is designed specifically for compact, high-reliability voltage regulation and ESD protection in portable and space-constrained electronic devices, emphasizing miniature packaging, tight tolerances, and robust transient immunity.

FAQ

What is the Zener voltage range of MM5Z7V5ST1 at 5 mA test current?

The MM5Z7V5ST1 has a specified Zener voltage range of 7.28 V to 7.60 V at I_ZT = 5 mA, corresponding to a nominal 7.5 V rating with ±4.3% tolerance. This range is measured under standard conditions (T_A = 25°C) and defines the actual clamping window for overvoltage protection circuits using the MM5Z7V5ST1.

Is MM5Z7V5ST1 compatible with lead-free reflow soldering processes?

Yes, MM5Z7V5ST1 features a 100% matte tin lead finish and is qualified for peak reflow temperatures up to 260°C, fully compliant with JEDEC J-STD-020 requirements for lead-free assembly. The device meets MSL 1 classification, eliminating the need for dry packing or pre-bake before soldering - a key advantage for high-yield manufacturing of products using MM5Z7V5ST1.

What is the maximum Zener impedance of MM5Z7V5ST1 and at what condition is it specified?

The maximum Zener impedance (Z_ZT) of MM5Z7V5ST1 is 160 Ω, specified at the test current I_ZT = 5 mA and T_A = 25°C. This value reflects dynamic resistance in the breakdown region and directly impacts regulation stability during fast transients - lower Z_ZT means tighter voltage control under varying load, critical for precision applications using MM5Z7V5ST1.

Does MM5Z7V5ST1 have ESD protection capability, and if so, what level?

Yes, MM5Z7V5ST1 is rated for Class 3 Human Body Model (HBM) ESD protection with >16 kV withstand capability. This intrinsic robustness allows MM5Z7V5ST1 to serve dual roles as both a voltage regulator and primary ESD clamp in I/O interfaces, reducing bill-of-materials count in portable designs without compromising IEC 61000-4-2 compliance.

What is the thermal resistance junction-to-ambient for MM5Z7V5ST1 on FR-4 board?

The thermal resistance junction-to-ambient (R_JA) of MM5Z7V5ST1 is 635 °C/W when mounted on an FR-4 board per the datasheet's test condition (Note 1). This high R_JA reflects the thermal limitations of the ultra-small SOD−523 package, necessitating strict derating: power must be reduced by 1.5 mW per °C above 25°C ambient to avoid exceeding the 200 mW absolute maximum rating of MM5Z7V5ST1.

MM5Z7V5ST1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SC-79, SOD-523

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 7.5 V

Tolerance:: ±2%

Power - Max:: 200 mW

Impedance (Max) (Zzt):: 15 Ohms

Current - Reverse Leakage @ Vr:: 1 µA @ 5 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-523

MM5Z7V5ST1 FAQ

1.How can I place an order for MM5Z7V5ST1 through Aetrix?

Please submit a Request for Quotation (RFQ) for MM5Z7V5ST1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MM5Z7V5ST1 reliable?

The price and inventory of MM5Z7V5ST1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z7V5ST1 is usually 5 days.

3.What payment methods are accepted for MM5Z7V5ST1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z7V5ST1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MM5Z7V5ST1?

MM5Z7V5ST1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MM5Z7V5ST1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MM5Z7V5ST1?

For technical support, including MM5Z7V5ST1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z7V5ST1 requirements.

6.How does Aetrix verify that MM5Z7V5ST1 is sourced from the original manufacturer or authorized distributors?

All MM5Z7V5ST1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MM5Z7V5ST1 meets industry standards.

7.What is the process for return or replacement of MM5Z7V5ST1?

All MM5Z7V5ST1 units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z7V5ST1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MM5Z7V5ST1 part is unused and in its original packaging.

Return procedure for MM5Z7V5ST1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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