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onsemi SZMM3Z9V1T1G
- Part No.:
- SZMM3Z9V1T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z9V1T1G.pdf
- Description:
- DIODE ZENER 9.1V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,063
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Product details
Overview
SZMM3Z9V1T1G from onsemi is a 9.1 V ±5% Zener voltage regulator diode in SOD−323 package, rated for 300 mW steady-state power dissipation at 25°C, with 15 Ω dynamic 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 SZMM3Z9V1T1G datasheet, pinout, applications, or equivalent options, key selection factors include Zener voltage tolerance (±5%), low-profile SOD−323 footprint (1.7 mm × 1.25 mm × 0.9 mm), AEC−Q101 qualification, Class 3 ESD rating (>16 kV HBM), and thermal resistance of 416°C/W.
Technical Context
This device operates as a two-terminal voltage reference by maintaining a stable reverse breakdown voltage across its cathode-anode terminals under controlled current conditions. It exhibits a positive temperature coefficient of +3.8 mV/°C and 130 pF junction capacitance at 0 V bias and 1 MHz, enabling stable regulation in low-noise analog and mixed-signal circuits.
The SOD−323 package supports high-density PCB layouts with Pb-free plating, UL 94 V−0 flammability rating, and 260°C reflow compatibility for 10 seconds. Its 4.507 mg unit weight and void-free molded plastic case ensure reliability in automotive and handheld applications requiring AEC−Q101 compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.5 V min / 9.1 V nom / 9.6 V max @ IZT = 5 mA - defines regulated output voltage range under standard test conditions |
| Power Dissipation (PD) | 300 mW @ TA = 25°C - maximum continuous power handling on FR-4 board; derates 2.4 mW/°C above 25°C |
| Zener Impedance (ZZT) | 15 Ω max @ IZT = 5 mA - indicates voltage stability under small-signal AC variations |
| Reverse Leakage (IR) | 0.2 µA max @ VR = 7.0 V - ensures minimal quiescent current draw in standby mode |
| Junction Temp Range | −65°C to +150°C - supports operation in extended industrial and automotive ambient environments |
| ESD Rating | Class 3 (>16 kV) per HBM - provides robustness against electrostatic discharge during handling and assembly |
| Capacitance (C) | 130 pF @ VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent circuits |
Pinout & Package
SZMM3Z9V1T1G is housed in a SOD−323 surface-mount package (Case 477, Style 1) with cathode indicated by a polarity band. Dimensions: 1.70 mm × 1.25 mm × 0.90 mm (L × W × H), body weight 4.507 mg, UL 94 V−0 rated, and compatible with standard reflow profiles up to 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Regulated Output Terminal | Connected to reference node; voltage is clamped to VZ when reverse-biased above breakdown threshold |
| 2 (Anode) | Reference Ground Terminal | Typically tied to system ground or lower-potential rail; completes current path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 Qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock |
| Pb-Free Construction | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow requirements without lead-based solder |
| Low Profile Height | 0.9 mm max height enables use in ultra-thin devices such as wearables and slim smartphones |
| High ESD Robustness | Class 3 HBM rating (>16 kV) reduces risk of field failure due to static discharge during end-user handling |
| Stable Temp Coefficient | +3.8 mV/°C allows predictable voltage drift over temperature-critical for battery-powered sensor references |
Applications
| Smartphone Power Management | Automotive Body Control Module |
|---|---|
|
Use Scenario: Regulating reference voltage for ADCs monitoring battery voltage and charging status in compact smartphone PCBs. IC Role / Device Role / Timing Role: Two-terminal Zener reference providing stable 9.1 V reference point for analog front-end circuitry. Use Value: Enables accurate 12-bit ADC measurements within ±0.5% error budget despite wide ambient temperature swings (−20°C to +70°C). |
Use Scenario: Clamping transient surges on LIN bus lines and sensor supply rails in vehicle door modules. IC Role / Device Role / Timing Role: Overvoltage protection element absorbing load-dump spikes up to 40 V while maintaining low leakage. Use Value: Prevents damage to downstream MCUs and transceivers during ISO 7637-2 Pulse 5a events without adding bulk capacitance. |
| Medical Wearable Sensor Node | Industrial IoT Edge Controller |
|
Use Scenario: Providing stable bias for low-power op-amps conditioning ECG electrode signals in patch-style monitors. IC Role / Device Role / Timing Role: Precision voltage reference ensuring consistent gain calibration across production units. Use Value: Maintains <10 ppm/°C effective drift after compensation, meeting IEC 60601-2-47 accuracy requirements. |
Use Scenario: Generating local 9.1 V reference for isolated RS-485 transceiver biasing in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Standalone Zener shunt regulator powering auxiliary logic in multi-voltage domain systems. Use Value: Eliminates need for dedicated LDO, reducing BOM count and PCB area by 35% compared to integrated solutions. |
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-B9V1,115 | Same 9.1 V nominal Zener voltage, but SOD-323 package with 400 mW PD rating and higher ZZT (35 Ω) | Higher power margin suits intermittent surge clamping; less suitable for precision reference due to wider VZ tolerance (±5% vs ±2.5%) | Select when needing higher pulse energy absorption without changing layout |
| MMSZ4687T1G | 9.1 V Zener, SOD-123 package (2.7 mm × 1.6 mm), 500 mW rating, 20 Ω ZZT, −65°C to +150°C range | Larger footprint increases board area by 2.3×; better thermal performance for sustained 10 mA operation | Choose when thermal management outweighs size constraints, e.g., in industrial power supplies |
Compared with BZX384-B9V1,115 and MMSZ4687T1G, SZMM3Z9V1T1G offers the smallest footprint and AEC−Q101 qualification, making it optimal for automotive and portable designs where space, reliability, and regulatory compliance are prioritized over raw power handling.
Availability
SZMM3Z9V1T1G is available at Aetrix Electronics and suitable for smartphone power management, automotive body control modules, medical wearable sensor nodes, and industrial IoT edge controllers requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SZMM3Z9V1T1G 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
SZMM3Z9V1T1G belongs to the MM3ZxxxT1G/SZMM3ZxxxT1G family of 300 mW Zener regulators designed specifically for high-density, space-constrained applications demanding AEC−Q101 compliance and robust ESD immunity.
FAQ
What is the Zener voltage tolerance of SZMM3Z9V1T1G?
The SZMM3Z9V1T1G has a nominal Zener voltage of 9.1 V with a tolerance of ±5%, meaning the actual measured voltage falls between 8.5 V and 9.6 V when tested at IZT = 5 mA and TA = 25°C. This tolerance is specified in the Electrical Characteristics table on page 2 of the official datasheet and applies to all units shipped under this part number.
Is SZMM3Z9V1T1G suitable for automotive applications?
Yes, SZMM3Z9V1T1G is AEC−Q101 qualified and PPAP capable, with the "SZ" prefix explicitly indicating compliance for automotive and other applications requiring unique site and control change requirements. Its operating junction temperature range (−65°C to +150°C) and Class 3 HBM ESD rating further validate its suitability for under-hood and body electronics.
What is the thermal resistance of SZMM3Z9V1T1G?
The thermal resistance from junction-to-ambient (RJA) for SZMM3Z9V1T1G is 416°C/W when mounted on an FR-4 board with a single-sided 1 cm² copper pad. This value is critical for calculating maximum allowable power dissipation at elevated ambient temperatures and is listed in the Maximum Ratings table of the datasheet.
Does SZMM3Z9V1T1G have a Pb-free finish?
Yes, SZMM3Z9V1T1G is a Pb-free device, as confirmed by the "T1G" suffix and explicit statement in the datasheet: "These are Pb−Free Devices." The leads are plated with Sn only, compliant with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow standards.
What is the reverse leakage current specification for SZMM3Z9V1T1G?
The reverse leakage current (IR) for SZMM3Z9V1T1G is specified as 0.2 µA maximum at a reverse voltage (VR) of 7.0 V and ambient temperature of 25°C. This parameter ensures minimal current draw in standby or monitoring modes, supporting ultra-low-power system design.
SZMM3Z9V1T1G 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):
- 9.1 V
- Tolerance:
- ±6%
- Power - Max:
- 300 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-323
SZMM3Z9V1T1G FAQ
1.How can I place an order for SZMM3Z9V1T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z9V1T1G 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 SZMM3Z9V1T1G reliable?
The price and inventory of SZMM3Z9V1T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z9V1T1G is usually 5 days.
3.What payment methods are accepted for SZMM3Z9V1T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z9V1T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z9V1T1G?
SZMM3Z9V1T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z9V1T1G 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 SZMM3Z9V1T1G?
For technical support, including SZMM3Z9V1T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z9V1T1G requirements.
6.How does Aetrix verify that SZMM3Z9V1T1G is sourced from the original manufacturer or authorized distributors?
All SZMM3Z9V1T1G 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 SZMM3Z9V1T1G meets industry standards.
7.What is the process for return or replacement of SZMM3Z9V1T1G?
All SZMM3Z9V1T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z9V1T1G, 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 SZMM3Z9V1T1G part is unused and in its original packaging.
Return procedure for SZMM3Z9V1T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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