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

Diodes Incorporated ZMM5246B-7

Name: ZMM5246B-7
Brand: Diodes Incorporated
SKU: ZMM5246B-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZMM5246B-7

Manufacturer:: Diodes Incorporated

Category:: Single Zener Diodes

Package:: DO-213AC, MINI-MELF, SOD-80

Datasheet:: ZMM5246B-7.pdf

Description:: DIODE ZENER 16V 500MW MINI MELF

Quantity:: RFQ Add To RFQ list

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Inventory:2,454

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Product details

Overview

ZMM5246B-7 from Diodes Incorporated is a 16 V, 500 mW surface-mount Zener diode in MiniMELF (DO-213AA) glass package, rated for 7.8 mA test current and 17 Ω dynamic impedance at 1 mA, with +0.083 %/°C temperature coefficient-used for precision voltage reference and overvoltage protection in low-power analog sensor interfaces.

For engineers reviewing the ZMM5246B-7 datasheet, ZMM5246B-7 pinout, ZMM5246B-7 application, or ZMM5246B-7 equivalent, this part serves as a stable, low-capacitance (≈12 pF) voltage clamp in battery-powered instrumentation, power supply feedback networks, and ESD-tolerant signal conditioning circuits where thermal stability and miniaturized SMT packaging are critical.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal zener voltage of 16 V (range: 15.2–16.8 V at I_ZT = 7.8 mA), exhibiting low dynamic impedance (600 Ω at I_ZK = 0.25 mA) and minimal leakage (<0.1 µA at 12 V reverse bias). Its MiniMELF hermetic glass construction ensures robust thermal performance (R_JA = 300 °C/W) and long-term stability across -65°C to +175°C operating range.

The device features a cathode band polarity marker, solderable terminals compliant with MIL-STD-202 Method 208, and junction capacitance of approximately 12 pF at 2.0 V reverse bias-enabling use in moderate-frequency regulation and transient suppression without significant capacitive loading.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	16 V nominal, 15.2–16.8 V range at 7.8 mA - defines precise clamping threshold for reference and protection
Power Dissipation (P_D)	500 mW - supports continuous operation in compact PCB layouts without forced cooling
Zener Impedance (Z_ZT)	17 Ω at 7.8 mA - ensures low output impedance for stable voltage regulation under load variation
Reverse Leakage (I_R)	<0.1 µA at 12 V - minimizes standby current in battery-critical applications
Temp. Coefficient (TC)	+0.083 %/°C - enables predictable drift compensation in wide-temperature industrial environments
Junction Capacitance (C_j)	≈12 pF at 2 V - suitable for DC and low-MHz signal path clamping without bandwidth degradation
Package	MiniMELF (DO-213AA), 3.3–3.7 mm length × 1.3–1.6 mm diameter - enables high-density automated placement

Pinout & Package

MiniMELF (DO-213AA) glass package with axial leads and cathode band marking; no discrete pins-cathode and anode are accessed via opposite ends of the cylindrical body.

Pin/Terminal	Circuit Role	Design Meaning
Cathode End (band-marked)	Reverse-biased terminal	Connected to higher potential in Zener regulation; determines polarity-sensitive placement on PCB
Anode End (unmarked)	Reference/ground terminal	Typically tied to system ground or feedback node; establishes reference point for clamping action

Key Features

Feature	Design Value
Hermetic Glass Construction	Ensures moisture resistance and long-term parameter stability in harsh environments
Low Thermal Resistance	R_JA = 300 °C/W enables reliable 500 mW dissipation without heatsinking
Precision Voltage Tolerance	±5% total tolerance (15.2–16.8 V) supports tight-regulation designs without trimming
MIL-STD-202 Solderability	Guarantees consistent reflow yield in high-volume SMT assembly lines

Applications

Industrial Sensor Signal Conditioning

USB-C Power Delivery Feedback

Use Scenario: Clamping amplifier input rails in 4–20 mA loop-powered pressure transmitters exposed to EMI and supply transients.

IC Role / Device Role / Timing Role: Zener diode acting as bidirectional overvoltage protector and precision reference for op-amp biasing.

Use Value: Maintains ±0.5% reference accuracy over -40°C to +85°C while limiting fault current to <10 mA during 1 kV ESD events.

Use Scenario: Providing stable 16 V reference for error amplifier feedback in 20 V USB PD sink controllers.

IC Role / Device Role / Timing Role: Precision shunt regulator setting output voltage setpoint in isolated flyback secondary-side control.

Use Value: Enables ±1% output regulation across 10–100 mA load range with <10 ppm/°C effective TC when combined with matched resistors.

Portable Medical Pulse Oximeter

Automotive Cabin Control Panel

Use Scenario: Protecting ADC input of low-noise analog front-end from electrostatic discharge during finger contact.

IC Role / Device Role / Timing Role: Low-capacitance (12 pF) Zener clamp placed directly at ADC input pin.

Use Value: Prevents latch-up without degrading 12-bit ENOB performance up to 10 kHz sampling rate.

Use Scenario: Stabilizing 16 V rail for microcontroller I/O protection in 12 V automotive infotainment displays.

IC Role / Device Role / Timing Role: Standby-mode voltage supervisor and transient suppressor on 16 V auxiliary supply line.

Use Value: Survives ISO 7637-2 pulse 5a (75 V/300 ms) without degradation, supporting AEC-Q200 Class 2 qualification.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX55C16-TR	Same 16 V rating, but 500 mW in DO-35 glass package; higher R_JA (500 °C/W), larger footprint	Less suitable for high-density MiniMELF layouts; lower thermal efficiency in sealed enclosures	Prefer when legacy DO-35 footprint compatibility is required over thermal performance
MMSZ5246ET1G	SOD-123 plastic package; same 16 V, 500 mW, but higher leakage (≤1 µA @ 12 V) and wider V_Z tolerance (±5% vs ±5% identical)	Lower moisture resistance; not recommended for extended outdoor or medical sterilization environments	Choose for cost-sensitive consumer applications where hermetic sealing is unnecessary

Compared with BZX55C16-TR and MMSZ5246ET1G, ZMM5246B-7 delivers superior thermal management and hermetic reliability in space-constrained, high-stability applications-making it optimal for industrial sensing and medical electronics where long-term parametric drift must be minimized.

Availability

ZMM5246B-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB-C power delivery feedback, portable medical pulse oximeters, and automotive cabin control panels requiring stable component supply across multi-year production cycles.

Supply support for ZMM5246B-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, specializing in high-reliability, high-efficiency components for industrial, computing, and automotive markets.

ZMM52xxB series belongs to Diodes' precision Zener diode product line, engineered for stable voltage reference and overvoltage protection in space-constrained, thermally demanding applications-particularly where hermetic packaging and tight TC control are essential.

FAQ

What is the maximum steady-state power dissipation for ZMM5246B-7 at 75°C ambient?

At 75°C ambient, the maximum steady-state power dissipation is derated to 375 mW, calculated using the 500 mW rating at 25°C and thermal resistance R_JA = 300 °C/W. This ensures junction temperature remains below 175°C-the absolute maximum rated value.

Can ZMM5246B-7 be used in place of ZMM5245B or ZMM5247B in existing designs?

Yes, but only if the 15–17 V functional window accommodates the 16 V nominal voltage and ±5% tolerance. ZMM5245B (15 V) and ZMM5247B (17 V) differ by 1 V center point and exhibit different temperature coefficients (+0.082 %/°C and +0.084 %/°C), so direct substitution may shift regulation accuracy in temperature-varying conditions.

Is ZMM5246B-7 compatible with lead-free reflow profiles?

Yes-its MiniMELF glass package and solderable terminals comply with IPC/JEDEC J-STD-020D for lead-free reflow, supporting peak temperatures up to 260°C for 10 seconds. The device passes thermal shock testing per MIL-STD-202 Method 107.

Does ZMM5246B-7 have a SPICE model available for simulation?

Yes-Diodes Incorporated provides verified SPICE models for ZMM5235B, ZMM5260B, and ZMM5262B in the DS30024 datasheet appendix. While no dedicated model is published for ZMM5246B-7, its electrical characteristics closely match ZMM5260B's model when adjusted for V_Z and TC parameters in behavioral simulation.

ZMM5246B-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: DO-213AC, MINI-MELF, SOD-80

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 16 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 17 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 12 V

Voltage - Forward (Vf) (Max) @ If:: 1.5 V @ 200 mA

Operating Temperature:: -65°C ~ 175°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: Mini MELF

ZMM5246B-7 FAQ

1.How can I place an order for ZMM5246B-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZMM5246B-7 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 ZMM5246B-7 reliable?

The price and inventory of ZMM5246B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMM5246B-7 is usually 5 days.

3.What payment methods are accepted for ZMM5246B-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMM5246B-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZMM5246B-7?

ZMM5246B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZMM5246B-7 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 ZMM5246B-7?

For technical support, including ZMM5246B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMM5246B-7 requirements.

6.How does Aetrix verify that ZMM5246B-7 is sourced from the original manufacturer or authorized distributors?

All ZMM5246B-7 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 ZMM5246B-7 meets industry standards.

7.What is the process for return or replacement of ZMM5246B-7?

All ZMM5246B-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZMM5246B-7, 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 ZMM5246B-7 part is unused and in its original packaging.

Return procedure for ZMM5246B-7:

1.Submit a request within 90 days.

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

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