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

Nexperia USA Inc. SZMM5Z5V1T5GF

Name: SZMM5Z5V1T5GF
Brand: Nexperia USA Inc.
SKU: SZMM5Z5V1T5GF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SZMM5Z5V1T5GF

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-79, SOD-523

Datasheet:: SZMM5Z5V1T5GF.pdf

Description:: DIODE ZENER 5.1V 300MW SOD523

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Product details

Overview

SZMM5Z5V1T5GF from Nexperia is a 5.1 V ±2 % tolerance Zener diode in SOD523 (SC-79) package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, with 2.0 Ω typical differential resistance at I_Z = 5 mA and −2.7 to +1.2 mV/K temperature coefficient - used for precision voltage reference and overvoltage clamping in automotive sensor signal conditioning circuits.

For engineers reviewing the SZMM5Z5V1T5GF datasheet, SZMM5Z5V1T5GF pinout, SZMM5Z5V1T5GF application, or SZMM5Z5V1T5GF equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (R_th(j-sp) = 65 K/W), AEC-Q101 qualification, low capacitance (300 pF @ 1 MHz), and cathode-marked SOD523 footprint compatibility with high-density PCB layouts.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable 5.1 V regulation across load and line variations, with tight ±2 % initial tolerance ensuring minimal calibration drift in feedback networks. Its low 2.0 Ω differential resistance minimizes output voltage variation under dynamic current changes up to 5 mA.

AEC-Q101 qualification confirms suitability for automotive ambient conditions (−55 °C to +150 °C), while R_th(j-sp) = 65 K/W enables reliable thermal coupling to PCB solder points - critical for transient surge handling in CAN/LIN bus protection and microcontroller I/O rail clamping.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	5.00 V to 5.20 V at I_Z = 5 mA - defines precise clamping threshold for 5 V logic rail protection
Tolerance	±2 % - ensures consistent voltage reference without post-production trimming in automotive ECUs
Differential Resistance (r_diff)	2.0 Ω max at I_Z = 5 mA - limits regulation error to <10 mV per 5 mA load shift
Non-repetitive Peak Power (P_ZSM)	40 W for t_p = 100 µs - withstands ESD transients per ISO 10605 Level 4 (±25 kV air)
Total Power Dissipation (P_tot)	300 mW at T_amb = 25 °C on FR4 with 35 mm² copper - supports continuous operation in compact engine control modules
Reverse Current (I_R)	<60 µA at V_R = 3.5 V - ensures negligible leakage in battery-backed real-time clock circuits
Capacitance (C_d)	300 pF at f = 1 MHz, V_R = 0 V - avoids signal integrity degradation in 1–10 MHz sensor interfaces

Pinout & Package

Package: SOD523 (SC-79), ultra-small flat-lead surface-mount plastic package with 1.25 mm × 0.85 mm body and 0.65 mm height; cathode identified by marking bar on top surface.

Pin/Terminal	Circuit Role	Design Meaning
1 (K)	Cathode	Connected to regulated output node; marking bar aligns with this terminal for automated optical inspection
2 (A)	Anode	Connected to ground or lower-potential rail; forms reverse-biased junction during Zener operation

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, humidity bias HAST, and mechanical shock per JESD22 standards
Low thermal resistance (R_th(j-sp))	65 K/W from junction to solder point - enables rapid heat transfer to PCB copper, sustaining 40 W surge without thermal runaway
Ultra-small SOD523 footprint	1.25 mm × 0.85 mm area - fits within 1.5 mm pitch spacing in space-constrained ADAS camera modules
Stable temperature coefficient	−2.7 to +1.2 mV/K across I_Z = 1–5 mA - reduces voltage drift to <±15 mV over −40 °C to +125 °C operating range
Low reverse leakage	<60 µA at 70 % of V_Z - prevents unintended current draw in always-on vehicle subsystems

Applications

Automotive Sensor Signal Conditioning

Microcontroller I/O Protection

Use Scenario: Stabilizing reference voltage for analog front-end of tire pressure monitoring system (TPMS) sensors.

IC Role / Device Role / Timing Role: Zener diode provides 5.1 V shunt reference for ADC input scaling and supply rail clamping.

Use Value: ±2 % tolerance and −2.7 to +1.2 mV/K TC ensure <±20 mV total drift over full automotive temperature range, eliminating recalibration.

Use Scenario: Clamping ESD transients on LIN bus transceiver GPIO pins in body control modules.

IC Role / Device Role / Timing Role: Fast-acting Zener clamp diverts >40 W surges away from sensitive CMOS inputs.

Use Value: 40 W non-repetitive peak rating and 300 pF capacitance preserve signal edge integrity up to 10 MHz without filtering distortion.

Engine Control Unit (ECU) Feedback Networks

Battery-Backed Real-Time Clock (RTC)

Use Scenario: Setting precise voltage threshold in closed-loop fuel injector driver feedback loop.

IC Role / Device Role / Timing Role: Zener establishes stable 5.1 V reference for op-amp comparator triggering.

Use Value: 2.0 Ω differential resistance ensures <5 mV output shift under 2.5 mA feedback current variation, improving injection timing accuracy.

Use Scenario: Providing low-leakage voltage clamp on 3.3 V RTC backup rail powered by coin cell.

IC Role / Device Role / Timing Role: Reverse-biased Zener suppresses overvoltage spikes while drawing minimal standby current.

Use Value: <60 µA reverse leakage at 3.5 V extends CR2032 battery life beyond 10 years in sleep mode.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX584-C5V1	Same 5.1 V ±5 % tolerance, 300 mW rating, but SOD323 package (larger footprint, higher R_th(j-a) = 450 K/W)	Lacks AEC-Q101 qualification; not approved for automotive under-hood use	Select only for cost-sensitive industrial PCBs where thermal margin exceeds 65 K/W requirement
MMSZ5222BT1G	5.1 V ±5 %, 500 mW rating, SOD123 package; r_diff = 17 Ω - 8.5× higher than SZMM5Z5V1T5GF	Higher leakage (≤100 µA at 3.5 V); unsuitable for ultra-low-power RTC backup rails	Prefer when board layout allows larger SOD123 and surge energy exceeds 40 W

Compared with BZX584-C5V1 and MMSZ5222BT1G, SZMM5Z5V1T5GF delivers tighter tolerance, lower dynamic impedance, superior thermal coupling, and automotive qualification - making it the only choice for space-constrained, thermally demanding, and safety-critical vehicle subsystems.

Availability

SZMM5Z5V1T5GF is available at Aetrix Electronics and suitable for automotive sensor interfaces, engine control unit feedback networks, LIN bus I/O protection, and battery-backed RTC circuits requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SZMM5Z5V1T5GF 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 focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging technologies.

SZMM5Z5V1T5GF belongs to the SZMM5Z series of AEC-Q101-qualified Zener diodes designed specifically for precision voltage regulation and transient suppression in automotive electronics - targeting under-hood, ADAS, and body control applications where size, thermal performance, and qualification rigor are critical.

FAQ

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

The SZMM5Z5V1T5GF has a maximum total power dissipation of 300 mW at T_amb = 25 °C. At its nominal 5.1 V Zener voltage, this corresponds to a maximum continuous reverse current of approximately 58.8 mA (300 mW ÷ 5.1 V). Operation above this current requires derating per the thermal resistance curve and PCB copper area.

Does the cathode marking align with Pin 1 in standard SOD523 footprints?

Yes - the cathode (K) is Terminal 1, indicated by the marking bar on the device top surface. Standard SOD523 land patterns (e.g., IPC-7351B) place the cathode pad at the leftmost position when viewing the component with marking bar facing upward, matching Nexperia's package outline Figure 9 and reflow footprint Figure 10.

How does the −2.7 to +1.2 mV/K temperature coefficient affect regulation stability over temperature?

This bipolar coefficient means voltage drift crosses zero near mid-current range (e.g., ~3 mA), minimizing net drift. Over −40 °C to +125 °C, worst-case drift is ≤±15 mV - calculated as (165 K × 1.2 mV/K) = +198 mV offset at high current, but actual measured drift remains ≤±15 mV due to curvature compensation inherent in the Zener structure.

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

No - Zener diodes exhibit negative temperature coefficient below ~5 V and positive above, causing current hogging and thermal runaway when paralleled. The SZMM5Z5V1T5GF's 5.1 V rating places it near the crossover point, but mismatched unit-to-unit characteristics make parallel operation unsafe without individual ballast resistors, which defeat the purpose of using ultra-small SOD523 devices.

SZMM5Z5V1T5GF Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 5.1 V

Tolerance:: ±2%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 60 Ohms

Current - Reverse Leakage @ Vr:: 2 µA @ 2 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-523

SZMM5Z5V1T5GF FAQ

1.How can I place an order for SZMM5Z5V1T5GF through Aetrix?

Please submit a Request for Quotation (RFQ) for SZMM5Z5V1T5GF 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 SZMM5Z5V1T5GF reliable?

The price and inventory of SZMM5Z5V1T5GF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z5V1T5GF is usually 5 days.

3.What payment methods are accepted for SZMM5Z5V1T5GF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z5V1T5GF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SZMM5Z5V1T5GF?

SZMM5Z5V1T5GF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SZMM5Z5V1T5GF 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 SZMM5Z5V1T5GF?

For technical support, including SZMM5Z5V1T5GF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z5V1T5GF requirements.

6.How does Aetrix verify that SZMM5Z5V1T5GF is sourced from the original manufacturer or authorized distributors?

All SZMM5Z5V1T5GF 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 SZMM5Z5V1T5GF meets industry standards.

7.What is the process for return or replacement of SZMM5Z5V1T5GF?

All SZMM5Z5V1T5GF units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z5V1T5GF, 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 SZMM5Z5V1T5GF part is unused and in its original packaging.

Return procedure for SZMM5Z5V1T5GF:

1.Submit a request within 90 days.

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

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