My Inquiry
My Account
Nexperia USA Inc. SZMM3Z75VT1GX
- Part No.:
- SZMM3Z75VT1GX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z75VT1GX.pdf
- Description:
- DIODE ZENER 75V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:480
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SZMM3Z75VT1GX from Nexperia is a 75 V ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, designed for precision voltage reference and overvoltage protection in automotive and industrial power rails.
For engineers reviewing the SZMM3Z75VT1GX datasheet, SZMM3Z75VT1GX pinout, SZMM3Z75VT1GX application, or SZMM3Z75VT1GX equivalent, this device offers AEC-Q101 qualification, low differential resistance (0.05 Ω), temperature coefficient of +73.4 to +88.6 mV/K at IZ = 2 mA, and junction-to-ambient thermal resistance of 415 K/W - critical for stable regulation under transient surge and ambient temperature variation.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal working voltage of 75 V (min 70 V, max 79 V at IZ = 2 mA), exhibiting a positive temperature coefficient (+73.4 to +88.6 mV/K) that ensures predictable drift in high-temperature environments. Its low differential resistance (0.05 Ω) enables tight regulation under varying load current.
The device supports pulsed operation up to 40 W (tp = 100 µs, square wave) and continuous DC dissipation of 300 mW at Tamb = 25 °C on FR4 PCB. It is qualified per AEC-Q101, confirming suitability for automotive power supply monitoring and ECU voltage clamping applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 75 V (min 70 V, max 79 V at IZ = 2 mA); defines precise clamping threshold for overvoltage protection circuits |
| Tolerance | ±5 %; ensures predictable voltage margin for safety-critical regulation without post-production trimming |
| Differential Resistance | 0.05 Ω; maintains <10 mV output deviation across 1–5 mA Zener current variation |
| Temperature Coefficient | +73.4 to +88.6 mV/K at IZ = 2 mA; enables accurate thermal drift modeling in 125 °C under-hood environments |
| Total Power Dissipation | 300 mW at Tamb = 25 °C on standard FR4 PCB; sets maximum steady-state power handling without heatsinking |
| Non-repetitive Peak Power | 40 W (tp = 100 µs); sustains transient surge events like load dump or ISO 7637-2 pulse 5a |
| Junction Temperature Limit | 150 °C; supports operation in extended-temperature automotive ECUs and industrial controllers |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package with 2 leads, 1.35 mm × 0.85 mm footprint, 0.45 mm height, 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; marking bar identifies this terminal |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for voltage reference or clamping function |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias HAST, and ESD robustness (HBM ≥ 2 kV) |
| Low differential resistance | 0.05 Ω ensures <5 mV regulation error over ±1 mA Zener current change - critical for precision feedback paths |
| Wide voltage range coverage | Part of 37-device series spanning 2.4 V to 75 V, enabling single-source design reuse across multiple rail voltages |
| Thermal performance | Rth(j-a) = 415 K/W (FR4, single-sided copper) allows direct PCB-level thermal management without thermal vias |
Applications
| Automotive Load Dump Protection | Industrial Sensor Reference |
|---|---|
|
Use Scenario: Clamps 120 V load dump transients on 12 V vehicle power bus per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Standalone Zener clamp placed between battery rail and protected IC input. Use Value: Absorbs 40 W surge energy within 100 µs while holding rail below 85 V - preventing damage to downstream CAN transceivers and microcontrollers. |
Use Scenario: Provides stable 75 V reference for analog front-end of high-voltage battery cell monitor. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC input scaling and overvoltage alarm threshold. Use Value: ±5 % tolerance and +73.4 mV/K TC enable calibrated measurement accuracy across −40 °C to +125 °C without software compensation. |
| Power Supply Overvoltage Detection | LED Driver Current Regulation |
|
Use Scenario: Monitors 48 V telecom power supply output for >75 V fault condition triggering shutdown logic. IC Role / Device Role / Timing Role: Voltage sense element feeding comparator input; no active circuitry required. Use Value: Low leakage (<500 nA at 60 V) ensures minimal quiescent current draw while maintaining fast response to overvoltage events. |
Use Scenario: Sets constant current limit in linear LED driver by regulating voltage across sense resistor. IC Role / Device Role / Timing Role: Shunt regulator defining reference voltage for current mirror or op-amp control loop. Use Value: 0.05 Ω rdiff minimizes current drift across LED forward voltage variation, improving luminance stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B75,115 (Nexperia) | Same 75 V rating, ±5 %, but SOD323 package with 200 mW Ptot; higher rdiff (0.1 Ω) and no AEC-Q101 qualification | Limited to commercial-grade consumer power supplies; unsuitable for automotive due to missing stress test validation | Select when cost sensitivity outweighs automotive reliability requirements and surge immunity is not needed |
| 1N4744A (ON Semiconductor) | 75 V, ±5 %, but DO-41 through-hole package; 1 W Ptot, rdiff = 15 Ω, no AEC-Q101 | Requires board space and wave soldering; higher thermal resistance limits high-frequency transient absorption | Choose only for legacy through-hole designs where rework to SMD is impractical |
Compared with BZX384-B75 and 1N4744A, SZMM3Z75VT1GX delivers superior surge resilience (40 W vs ≤10 W), tighter regulation (0.05 Ω vs ≥15 Ω), and validated automotive reliability - making it the sole choice for new AEC-compliant designs requiring compact, high-fidelity voltage clamping.
Availability
SZMM3Z75VT1GX is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor reference, telecom power monitoring, and LED driver regulation requiring stable component supply across production lifecycles.
Supply support for SZMM3Z75VT1GX 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
SZMM3Z75VT1GX belongs to the SZMM3Z series of AEC-Q101-qualified Zener diodes engineered specifically for robust voltage regulation and transient suppression in harsh automotive and industrial environments.
FAQ
What is the maximum reverse voltage this Zener can regulate before breakdown?
The SZMM3Z75VT1GX has a nominal Zener voltage of 75 V, with guaranteed minimum and maximum values of 70 V and 79 V respectively at IZ = 2 mA. Below 70 V, it remains in high-impedance reverse-blocking state; above 79 V under specified test conditions, it enters full conduction with controlled dynamic resistance.
Can this diode be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients at low voltages but positive coefficients above ~5.6 V (like this 75 V part), yet manufacturing tolerances cause unequal current sharing. Parallel connection risks thermal runaway and premature failure; use a single higher-rated device or external current-balancing resistors if higher power is required.
Is the cathode marking visible under standard optical inspection?
Yes - the cathode (pin 1) is identified by a distinct white or black marking bar on the top surface of the SOD323 package, aligned with the cathode lead. This mark is clearly visible under 10× magnification and compatible with automated optical inspection (AOI) systems used in SMT line verification.
Does this part support reflow soldering per JEDEC J-STD-020?
Yes - the SZMM3Z75VT1GX is qualified for lead-free reflow per JEDEC J-STD-020D, with peak temperature rating of 260 °C (10-second duration). The recommended reflow profile uses ramp rate ≤3 °C/s, preheat 150–200 °C for 60–120 s, and time above liquidus (TAL) of 60–90 s at 235–245 °C.
SZMM3Z75VT1GX 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):
- 75 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 255 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 52.5 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
SZMM3Z75VT1GX FAQ
1.How can I place an order for SZMM3Z75VT1GX through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z75VT1GX 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 SZMM3Z75VT1GX reliable?
The price and inventory of SZMM3Z75VT1GX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z75VT1GX is usually 5 days.
3.What payment methods are accepted for SZMM3Z75VT1GX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z75VT1GX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z75VT1GX?
SZMM3Z75VT1GX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z75VT1GX 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 SZMM3Z75VT1GX?
For technical support, including SZMM3Z75VT1GX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z75VT1GX requirements.
6.How does Aetrix verify that SZMM3Z75VT1GX is sourced from the original manufacturer or authorized distributors?
All SZMM3Z75VT1GX 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 SZMM3Z75VT1GX meets industry standards.
7.What is the process for return or replacement of SZMM3Z75VT1GX?
All SZMM3Z75VT1GX units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z75VT1GX, 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 SZMM3Z75VT1GX part is unused and in its original packaging.
Return procedure for SZMM3Z75VT1GX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZMM3Z75VT1GX Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
