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

Nexperia USA Inc. SZMM3Z7V5T1GX

Name: SZMM3Z7V5T1GX
Brand: Nexperia USA Inc.
SKU: SZMM3Z7V5T1GX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SZMM3Z7V5T1GX

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-76, SOD-323

Datasheet:: SZMM3Z7V5T1GX.pdf

Description:: DIODE ZENER 7.5V 300MW SOD323

Quantity:: RFQ Add To RFQ list

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Inventory:26,880

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Product details

Overview

SZMM3Z7V5T1GX from Nexperia is a Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and overvoltage protection in low-power circuits. It delivers a nominal Zener voltage of 7.5 V with ±5 % tolerance, 0.5 Ω differential resistance at I_Z = 5 mA, and AEC-Q101 qualification for automotive-grade reliability - used in power supply feedback loops and ESD-clamped sensor interfaces.

For engineers reviewing the SZMM3Z7V5T1GX datasheet, SZMM3Z7V5T1GX pinout, SZMM3Z7V5T1GX application, or SZMM3Z7V5T1GX equivalent, key selection criteria include Zener voltage accuracy, thermal stability (2.5 mV/K tempco), junction-to-ambient thermal resistance (415 K/W), and non-repetitive surge capability (40 W @ 100 µs).

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage across load variations, with low dynamic impedance enabling tight regulation under transient current changes. Its 7.5 V nominal Zener voltage falls within the optimal range for 5 V/3.3 V system rail clamping and analog reference buffering.

Thermal design is constrained by R_th(j-a) = 415 K/W on FR4 PCB, requiring careful layout for ambient temperature limits (−55 °C to +150 °C). The AEC-Q101 qualification confirms robustness against automotive thermal cycling, humidity, and mechanical stress.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	7.06 V to 7.84 V at I_Z = 5 mA - ensures ±5 % regulation window for 7.5 V nominal reference
Differential Resistance (r_diff)	0.5 Ω max at I_Z = 5 mA - enables <10 mV output shift under 5 mA load change
Temperature Coefficient (S_Z)	+2.5 mV/K at I_Z = 5 mA - supports stable operation across −40 °C to +125 °C ambient
Total Power Dissipation (P_tot)	300 mW at T_amb = 25 °C - defines maximum continuous DC power on standard FR4 PCB
Non-repetitive Peak Power (P_ZSM)	40 W at t_p = 100 µs - provides transient overvoltage suppression for ESD or inductive spikes
Forward Voltage (V_F)	1.1 V max at I_F = 100 mA - limits forward conduction loss during fault conditions
Junction Temperature (T_j)	150 °C max - sets upper thermal limit for reliability in enclosed automotive modules

Pinout & Package

Package: SOD323 (SC-76), surface-mount plastic package with 2 leads; dimensions 2.7 mm × 1.6 mm × 1.1 mm; cathode marked by bar on top surface.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (K)	Connected to regulated output node; carries reverse current during Zener conduction
2	Anode (A)	Connected to ground or lower-potential rail; completes bias path for breakdown operation

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control units and body electronics
Low differential resistance	0.5 Ω max ensures minimal voltage deviation under dynamic load steps
Wide voltage range series	Part of 37-type family spanning 2.4 V to 75 V - simplifies BOM consolidation
Small SOD323 footprint	Enables high-density placement in space-constrained modules like ADAS sensors
Stable temperature coefficient	+2.5 mV/K allows predictable drift compensation in analog signal chains

Applications

Automotive Sensor Reference

USB Port Overvoltage Clamp

Use Scenario: Providing stable 7.5 V reference for analog front-end of tire pressure monitoring system (TPMS) sensor IC.

IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference, regulating bias voltage for op-amp and ADC input stages.

Use Value: ±5 % V_Z tolerance and +2.5 mV/K tempco ensure <±15 mV total drift over −40 °C to +125 °C, meeting ASIL-B functional safety margin.

Use Scenario: Clamping reverse transients on USB VBUS line during hot-plug events in infotainment head unit.

IC Role / Device Role / Timing Role: Shunt protector absorbing 40 W surge energy (100 µs pulse) before downstream LDO or USB switch fails.

Use Value: 40 W non-repetitive peak power rating prevents latch-up during ESD contact discharge per IEC 61000-4-2 Level 4.

Industrial PLC Input Protection

Medical Wearable Battery Monitor

Use Scenario: Protecting 24 V digital input channel of programmable logic controller against field-wiring surges.

IC Role / Device Role / Timing Role: Zener clamp placed between input terminal and optocoupler LED anode to limit voltage to safe forward threshold.

Use Value: 300 mW continuous dissipation sustains steady-state leakage without derating in 70 °C enclosure environments.

Use Scenario: Stabilizing reference voltage for lithium-ion cell voltage measurement in portable ECG patch.

IC Role / Device Role / Timing Role: Low-current Zener (I_Z = 5 mA) supplies precise bias to 12-bit delta-sigma ADC reference buffer.

Use Value: 0.5 Ω r_diff maintains <2.5 mV error under 10 µA reference load variation, preserving 0.1 % battery SOC accuracy.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-B7V5,115	Same 7.5 V nominal, ±5 %, but SOD323 package with 400 mW P_tot; higher r_diff (1.5 Ω)	Higher power handling suits industrial 24 V rail clamping; less suitable for low-drift analog references	Select when surge margin >300 mW required and tempco stability is secondary
MMSZ5236B-7-F	7.5 V, ±5 %, SOD123 package; 500 mW P_tot, r_diff = 1.0 Ω, no AEC-Q101 qualification	Larger footprint eases hand-soldering; lacks automotive qualification and tighter tempco	Prefer for cost-sensitive consumer designs where AEC-Q101 is not mandated

Compared with BZX384-B7V5 and MMSZ5236B-7-F, SZMM3Z7V5T1GX offers superior thermal stability (+2.5 mV/K vs. +3.2/+4.0 mV/K), lower dynamic impedance (0.5 Ω), and automotive qualification - making it optimal for safety-critical or high-precision voltage reference roles.

Availability

SZMM3Z7V5T1GX is available at Aetrix Electronics and suitable for automotive sensor modules, USB interface protection circuits, and industrial PLC input conditioning requiring stable component supply, AEC-Q101 compliance, and compact SOD323 packaging.

Supply support for SZMM3Z7V5T1GX 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

Nexperia is a global semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade quality.

SZMM3Z7V5T1GX belongs to the SZMM3Z series of general-purpose Zener diodes engineered for precision voltage regulation and transient suppression in space-constrained, thermally demanding applications such as automotive electronics and industrial controls.

FAQ

What is the maximum continuous reverse current this Zener can handle at 25 °C?

At T_amb = 25 °C, the device supports up to 40 mA continuous reverse current (I_Z = P_tot/V_Z ≈ 300 mW / 7.5 V), assuming no additional thermal derating. This value decreases linearly above 25 °C based on R_th(j-a) = 415 K/W and T_j(max) = 150 °C.

How does the marking 'LV' on the device body correlate to the part number?

The marking 'LV' is the factory code for SZMM3Z7V5T1GX per Table 4 of the datasheet; it uniquely identifies the 7.5 V variant within the SZMM3Z series and is laser-etched on the cathode-side surface of the SOD323 package.

Can this Zener be used in parallel for higher power dissipation?

No - Zener diodes exhibit manufacturing spread in V_Z, causing current imbalance and thermal runaway when paralleled. For higher power, use a single higher-rated device (e.g., SOD123-packaged MMSZ5236B) or active regulation instead.

Is the 40 W surge rating applicable to repetitive pulses?

No - the 40 W rating applies only to non-repetitive square-wave pulses of t_p = 100 µs, with ≥1 s interval between surges. Repetitive operation must stay within 300 mW average power limit to avoid junction overheating and permanent degradation.

SZMM3Z7V5T1GX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: SC-76, SOD-323

Packaging:: Tape & Reel (TR)

Product Status:: Active

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

Tolerance:: ±5%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 10 Ohms

Current - Reverse Leakage @ Vr:: 500 nA @ 4 V

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 100 mA

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-323

SZMM3Z7V5T1GX FAQ

1.How can I place an order for SZMM3Z7V5T1GX through Aetrix?

Please submit a Request for Quotation (RFQ) for SZMM3Z7V5T1GX 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 SZMM3Z7V5T1GX reliable?

The price and inventory of SZMM3Z7V5T1GX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z7V5T1GX is usually 5 days.

3.What payment methods are accepted for SZMM3Z7V5T1GX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z7V5T1GX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SZMM3Z7V5T1GX?

SZMM3Z7V5T1GX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SZMM3Z7V5T1GX 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 SZMM3Z7V5T1GX?

For technical support, including SZMM3Z7V5T1GX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z7V5T1GX requirements.

6.How does Aetrix verify that SZMM3Z7V5T1GX is sourced from the original manufacturer or authorized distributors?

All SZMM3Z7V5T1GX 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 SZMM3Z7V5T1GX meets industry standards.

7.What is the process for return or replacement of SZMM3Z7V5T1GX?

All SZMM3Z7V5T1GX units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z7V5T1GX, 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 SZMM3Z7V5T1GX part is unused and in its original packaging.

Return procedure for SZMM3Z7V5T1GX:

1.Submit a request within 90 days.

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

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