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onsemi SZMM3Z75VT1G
- Part No.:
- SZMM3Z75VT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z75VT1G.pdf
- Description:
- DIODE ZENER 75V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,767
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Product details
Overview
SZMM3Z75VT1G from onsemi is a 75 V ±4% Zener voltage regulator diode in SOD−323 package, rated for 300 mW steady-state power dissipation at 25°C, with 255 Ω maximum dynamic impedance at 2 mA test current and 0.05 μA reverse leakage at 52.5 V, used for precision voltage reference and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the SZMM3Z75VT1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, SOD−323 mechanical dimensions, AEC−Q101 qualification status, and direct alternative part comparisons for automotive and high-density PCB designs.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in silicon PN junction, with nominal Zener voltage of 75 V measured at 2 mA DC test current (IZT), and exhibits a positive temperature coefficient of +0.4 mV/°C above 6.2 V. Its low 0.9 mm body height and 1.7 mm × 1.25 mm footprint enable integration into ultra-thin mobile devices.
The SOD−323 package features Pb-free plating, UL 94 V−0 flammability rating, and 260°C soldering tolerance for 10 seconds. Thermal resistance junction-to-ambient is 416°C/W on FR-4 board with 1 cm² copper pad, supporting stable regulation up to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 70 V min / 75 V nom / 79 V max @ IZT = 2 mA - defines precise clamping threshold for overvoltage protection circuits |
| Power Dissipation (PD) | 300 mW @ TA = 25°C - sets maximum continuous power handling on standard FR-4 PCB |
| Zener Impedance (ZZT) | 255 Ω max @ IZT = 2 mA - determines output voltage stability under load transients |
| Reverse Leakage (IR) | 0.05 μA max @ VR = 52.5 V - ensures minimal standby current in battery-powered systems |
| Capacitance (C) | 35 pF @ VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering capability in RF-sensitive applications |
| ESD Rating | Class 3 (>16 kV) HBM - enables robust handling without external ESD protection in assembly lines |
| Junction Temp Range | −65°C to +150°C - supports operation in automotive under-hood and industrial environments |
Pinout & Package
SZMM3Z75VT1G is housed in a SOD−323 surface-mount plastic package (Case 477, Style 1), measuring 1.70 mm × 1.25 mm × 0.90 mm, with cathode indicated by a polarity band and marked "1G" on the device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; reverse-biased during normal operation |
| 2 (Anode) | Reference ground terminal | Tied to system ground or lower-potential rail; completes bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive applications including engine control units and infotainment power rails |
| Pb−Free construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profiles |
| Low profile (0.9 mm height) | Enables stacking under shields or placement beneath connectors in slim handheld devices |
| High ESD immunity (16 kV HBM) | Eliminates need for discrete TVS diodes in consumer-grade USB and audio interface protection |
| Stable tempco (+0.4 mV/°C) | Minimizes drift in reference voltage across −40°C to +125°C ambient operating range |
Applications
| Cellular Phone Power Management | Automotive Infotainment Supply Rail |
|---|---|
|
Use Scenario: Regulating auxiliary 5 V rail derived from 12 V battery via LDO in smartphone baseband subsystem. IC Role / Device Role / Timing Role: Zener voltage reference for feedback divider network in adjustable LDO controller. Use Value: Maintains ±1% output accuracy over temperature with <0.05 μA quiescent current, extending battery life. |
Use Scenario: Overvoltage clamp on HDMI hot-plug detect line in automotive head unit. IC Role / Device Role / Timing Role: Transient voltage suppressor protecting 3.3 V logic input from 12 V battery spikes. Use Value: Activates at 75 V to shunt surge energy before downstream ESD diodes reach breakdown. |
| High-Density PC Board Reference | Industrial Sensor Signal Conditioning |
|
Use Scenario: Providing stable 75 V reference for ADC input scaling in programmable logic controller analog input module. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric measurement circuitry. Use Value: Delivers 75 V ±4% tolerance with 255 Ω dynamic impedance, enabling 12-bit resolution accuracy. |
Use Scenario: Biasing photodiode amplifier in optical smoke detector requiring stable high-voltage supply. IC Role / Device Role / Timing Role: High-impedance voltage source for reverse-biasing sensing element. Use Value: Supplies 75 V with <0.05 μA leakage, minimizing dark current error in low-light detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B75,115 | Same 75 V nominal Zener, but 300 mW rating at 25°C with 200 Ω ZZT @ 5 mA; SOD-323 package, no AEC-Q101 qualification | Lacks automotive qualification and has higher test current (5 mA vs. 2 mA), reducing low-current stability in battery systems | Preferred for cost-sensitive industrial designs where AEC-Q101 is not required |
| MMSZ5265ET1G | 75 V Zener, 500 mW rating, 150 Ω ZZT @ 10 mA, SOD-123 package (2.7 mm × 1.6 mm), AEC-Q101 qualified | Larger footprint and higher power rating suit higher-energy transient suppression, but incompatible pin layout | Chosen when higher surge handling is needed and board area allows larger SOD-123 footprint |
Compared with BZX384-B75,115 and MMSZ5265ET1G, SZMM3Z75VT1G offers tighter 2 mA test condition matching for low-power reference use, smallest SOD−323 footprint among AEC−Q101−qualified 75 V Zeners, and lowest leakage current-making it optimal for space-constrained automotive and portable electronics.
Availability
SZMM3Z75VT1G is available at Aetrix Electronics and suitable for cellular phone power management, automotive infotainment supply rail protection, and high-density PC board reference applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SZMM3Z75VT1G 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 (Nasdaq: ON) is a global semiconductor supplier delivering energy-efficient solutions for automotive, industrial, cloud, medical, and IoT applications.
SZMM3Z75VT1G belongs to the MM3ZxxxT1G/SZMM3ZxxxT1G series of 300 mW Zener regulators designed specifically for space-constrained, high-reliability applications in automotive and portable electronics.
FAQ
What is the Zener voltage tolerance for SZMM3Z75VT1G?
The SZMM3Z75VT1G has a Zener voltage specification of 70 V minimum, 75 V nominal, and 79 V maximum at IZT = 2 mA and TA = 25°C, corresponding to ±4% tolerance around the nominal value. This tolerance remains valid across the full operating temperature range of −65°C to +150°C, as confirmed in the Electrical Characteristics table of the official onsemi datasheet.
Is SZMM3Z75VT1G qualified for automotive applications?
Yes, SZMM3Z75VT1G is AEC−Q101 qualified and PPAP capable, as explicitly stated in the "Specification Features" section of the datasheet. The "SZ" prefix denotes compliance with automotive-specific site and process controls, and the device meets stress testing requirements for temperature cycling, humidity, and mechanical shock per AEC−Q101 Rev D.
What is the maximum Zener impedance of SZMM3Z75VT1G and at what test condition?
The maximum Zener impedance (ZZT) of SZMM3Z75VT1G is 255 Ω, measured at IZT = 2 mA DC test current and TA = 25°C. This value reflects dynamic resistance under small-signal AC conditions and directly affects voltage regulation stability during load variations in precision reference circuits.
Does SZMM3Z75VT1G have Pb-free construction?
Yes, SZMM3Z75VT1G is explicitly labeled as a Pb−Free device in the Ordering Information table and carries the "G" suffix per onsemi's packaging nomenclature. It complies with RoHS Directive 2011/65/EU and uses Sn-only or Pb−Sn plating on leads, with full compatibility to lead-free reflow profiles per JEDEC J-STD-020.
What is the reverse leakage current specification for SZMM3Z75VT1G?
The reverse leakage current (IR) for SZMM3Z75VT1G is specified as 0.05 μA maximum at VR = 52.5 V and TA = 25°C. This ultra-low leakage enables minimal standby power draw in battery-operated systems and ensures accurate voltage reference performance in high-impedance feedback networks.
SZMM3Z75VT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- 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:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SZMM3Z75VT1G FAQ
1.How can I place an order for SZMM3Z75VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z75VT1G 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 SZMM3Z75VT1G reliable?
The price and inventory of SZMM3Z75VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z75VT1G is usually 5 days.
3.What payment methods are accepted for SZMM3Z75VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z75VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z75VT1G?
SZMM3Z75VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z75VT1G 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 SZMM3Z75VT1G?
For technical support, including SZMM3Z75VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z75VT1G requirements.
6.How does Aetrix verify that SZMM3Z75VT1G is sourced from the original manufacturer or authorized distributors?
All SZMM3Z75VT1G 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 SZMM3Z75VT1G meets industry standards.
7.What is the process for return or replacement of SZMM3Z75VT1G?
All SZMM3Z75VT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z75VT1G, 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 SZMM3Z75VT1G part is unused and in its original packaging.
Return procedure for SZMM3Z75VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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