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onsemi SZMM5Z9V1T1G
- Part No.:
- SZMM5Z9V1T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z9V1T1G.pdf
- Description:
- DIODE ZENER 9.1V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:3
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Product details
Overview
SZMM5Z9V1T1G from onsemi is a 9.1 V ±5% Zener voltage regulator diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with 15 Ω maximum Zener impedance at 5 mA test current and 0.2 μA reverse leakage at 7.0 V, used for precision voltage reference and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the SZMM5Z9V1T1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), low-profile SOD-523 footprint (1.20 mm × 0.80 mm), AEC-Q101 qualification for automotive use, ESD robustness (>16 kV HBM), and thermal derating behavior above 25 °C.
Technical Context
This device operates as a two-terminal voltage reference, conducting in reverse breakdown to clamp voltage across its terminals. Its Zener voltage is specified at IZT = 5 mA with nominal 9.1 V, minimum 8.5 V, and maximum 9.6 V at 25 °C, and exhibits a temperature coefficient of +3.8 mV/°C.
The SOD-523 package enables surface-mount integration on high-density PCBs, with MSL 1 rating, 260 °C max reflow temperature, and Pb-free matte tin lead finish. It supports bidirectional mounting and complies with RoHS and AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal, 8.5–9.6 V range at IZT = 5 mA - defines stable regulation point under typical bias |
| Power Dissipation (PD) | 500 mW at TA = 25 °C, derates 4.0 mW/°C above - sets maximum continuous thermal load on FR-4 board |
| Zener Impedance (ZZT) | 15 Ω max at IZT = 5 mA - determines output voltage stability under dynamic load changes |
| Reverse Leakage (IR) | 0.2 μA max at VR = 7.0 V - ensures minimal standby current in voltage-sense or clamping circuits |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - provides robust handling and system-level ESD immunity without external protection |
| Package | SOD-523 (1.20 mm × 0.80 mm × 0.60 mm) - enables placement in ultra-compact mobile and wearable PCB layouts |
| Temperature Coefficient | +3.8 mV/°C - quantifies voltage drift over operating temperature range (−65 to +150 °C) |
Pinout & Package
SOD-523 package: 2-terminal surface-mount device with cathode marked by polarity band. Body dimensions: 1.20 mm × 0.80 mm × 0.60 mm; mounting position unrestricted; qualified for 260 °C reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased terminal during Zener operation |
| 2 (Unbanded End) | Anode | Connected to circuit ground or lower-potential reference; completes reverse-bias path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including infotainment power rails and sensor biasing |
| Low Capacitance (130 pF) | Minimizes signal distortion in high-frequency voltage-clamp or ESD protection paths |
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements for consumer and industrial end equipment |
| MSL 1 Rating | Enables standard SMT assembly without moisture-sensitive handling or baking protocols |
| Small Outline (SOD-523) | Reduces PCB area by >50% vs. SOD-323, critical for multi-rail portable power management |
Applications
| Smartphone Power Rail Clamping | Automotive Cabin Sensor Reference |
|---|---|
Use Scenario: Protecting 3.3 V and 5 V LDO outputs from transient overvoltage during hot-swap or load-dump events in compact smartphone PMIC modules. IC Role / Device Role / Timing Role: Two-terminal shunt voltage clamp placed directly across rail and ground. Use Value: Prevents damage to downstream logic ICs using only 1.20 mm × 0.80 mm PCB area and no active control circuitry. |
Use Scenario: Providing stable 9.1 V reference for analog front-end amplifiers in cabin temperature/humidity sensors exposed to automotive ambient conditions. IC Role / Device Role / Timing Role: Precision DC voltage reference source with low tempco (+3.8 mV/°C) and AEC-Q101 reliability. Use Value: Maintains sensor accuracy across −40 to +125 °C without trimming or calibration due to tight 8.5–9.6 V tolerance. |
| Wearable Battery Monitoring | Industrial IoT Edge Node Protection |
Use Scenario: Regulating voltage for fuel-gauge ADC inputs in coin-cell-powered wearables where board space limits discrete component count. IC Role / Device Role / Timing Role: Low-leakage (0.2 μA @ 7 V) Zener reference enabling accurate battery voltage sampling during sleep mode. Use Value: Extends battery life by minimizing quiescent current while maintaining ±5% voltage accuracy over temperature. |
Use Scenario: Safeguarding RS-485 transceiver supply pins against EFT bursts and induced surges in factory-floor gateways. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp leveraging 16 kV HBM ESD rating and 15 Ω ZZT. Use Value: Eliminates need for TVS diodes in cost-sensitive designs while meeting IEC 61000-4-4 Level 3 immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C9V1 | Same 9.1 V nominal, ±5% tolerance, but SOD-323 package (1.7 × 1.3 mm); 400 mW PD; 20 Ω ZZT | Larger footprint; lower power rating; not AEC-Q101 qualified | Select when legacy SOD-323 layout exists and automotive qualification is unnecessary |
| MMSZ5240B | 9.1 V nominal, ±5%, SOD-123 package (3.7 × 1.6 mm); 500 mW PD; 15 Ω ZZT; no AEC-Q101 or >16 kV ESD | 3× larger PCB area; lacks automotive qualification and enhanced ESD robustness | Choose for non-automotive industrial use where board space is less constrained and ESD immunity is secondary |
Compared with BZX584-C9V1 and MMSZ5240B, SZMM5Z9V1T1G delivers identical voltage regulation performance in a significantly smaller footprint, adds AEC-Q101 qualification for automotive systems, and provides superior ESD immunity-making it optimal for next-generation portable and vehicle-integrated electronics where size, reliability, and ruggedness are co-prioritized.
Availability
SZMM5Z9V1T1G is available at Aetrix Electronics and suitable for smartphone power rail clamping, automotive cabin sensor reference, and wearable battery monitoring requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for SZMM5Z9V1T1G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
SZMM5Z9V1T1G belongs to the MM5Z/SZMM5ZxxxT1G series of miniature Zener regulators designed specifically for space-constrained, high-reliability voltage reference and overvoltage protection in portable and automotive electronics.
FAQ
What is the Zener voltage tolerance of SZMM5Z9V1T1G?
The SZMM5Z9V1T1G has a Zener voltage tolerance of ±5% at 25 °C, with a specified range of 8.5 V (minimum) to 9.6 V (maximum) at IZT = 5 mA. This tolerance remains valid across the full operating temperature range of −65 °C to +150 °C, and is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet for SZMM5Z9V1T1G.
Is SZMM5Z9V1T1G qualified for automotive applications?
Yes, SZMM5Z9V1T1G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the "Specification Features" section of the onsemi datasheet. The "SZ" prefix denotes compliance with automotive-specific site and control change requirements, making SZMM5Z9V1T1G suitable for use in automotive infotainment, body electronics, and cabin sensor subsystems.
What is the maximum Zener impedance of SZMM5Z9V1T1G and at what test condition?
The maximum Zener impedance (ZZT) of SZMM5Z9V1T1G is 15 Ω, measured at the Zener test current IZT = 5 mA and ambient temperature TA = 25 °C. This value is listed in the Electrical Characteristics table on page 3 of the onsemi datasheet and reflects dynamic resistance under stable regulation conditions.
Does SZMM5Z9V1T1G have ESD protection, and if so, what level?
SZMM5Z9V1T1G has an ESD rating of Class 3 (>16 kV) per the Human Body Model (HBM), as documented in the "Specification Features" section of the onsemi datasheet. This high-level ESD robustness eliminates the need for additional external protection in handheld and automotive interface circuits subject to routine handling and transient exposure.
What is the thermal derating behavior of SZMM5Z9V1T1G above 25 °C?
SZMM5Z9V1T1G derates linearly at 4.0 mW/°C above 25 °C ambient temperature, with a junction-to-ambient thermal resistance (RJA) of 250 °C/W on FR-4 board. Its maximum power dissipation drops from 500 mW at 25 °C to zero at 150 °C, as shown in Figure 1 of the onsemi datasheet.
SZMM5Z9V1T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±6%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 200 nA @ 7 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-523
SZMM5Z9V1T1G FAQ
1.How can I place an order for SZMM5Z9V1T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z9V1T1G 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 SZMM5Z9V1T1G reliable?
The price and inventory of SZMM5Z9V1T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z9V1T1G is usually 5 days.
3.What payment methods are accepted for SZMM5Z9V1T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z9V1T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z9V1T1G?
SZMM5Z9V1T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z9V1T1G 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 SZMM5Z9V1T1G?
For technical support, including SZMM5Z9V1T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z9V1T1G requirements.
6.How does Aetrix verify that SZMM5Z9V1T1G is sourced from the original manufacturer or authorized distributors?
All SZMM5Z9V1T1G 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 SZMM5Z9V1T1G meets industry standards.
7.What is the process for return or replacement of SZMM5Z9V1T1G?
All SZMM5Z9V1T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z9V1T1G, 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 SZMM5Z9V1T1G part is unused and in its original packaging.
Return procedure for SZMM5Z9V1T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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