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onsemi SZMM3Z3V3T1G
- Part No.:
- SZMM3Z3V3T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z3V3T1G.pdf
- Description:
- DIODE ZENER 3.3V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:11,297
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Product details
Overview
SZMM3Z3V3T1G from onsemi is a 3.3 V, 300 mW Zener voltage regulator diode in SOD−323 package, designed for precision voltage reference and overvoltage protection in space-constrained circuits. It delivers nominal Zener voltage of 3.3 V (±0.2 V tolerance), 95 Ω dynamic impedance at 5 mA test current, and <5 µA leakage at 1.0 V reverse bias - enabling stable regulation in low-power portable electronics.
For engineers reviewing the SZMM3Z3V3T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC−Q101 qualification, 16 kV HBM ESD rating, −65°C to +150°C operating range, and Pb−free SOD−323 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable output voltage by conducting reverse current above its specified Zener breakdown threshold. Its thermal resistance (RJA = 416°C/W) and 300 mW power rating are defined for FR-4 board with 1 cm² copper pad, supporting reliable operation up to +150°C junction temperature.
The SZMM3Z3V3T1G exhibits a negative temperature coefficient of −3.5 mV/°C and 450 pF capacitance at 0 V bias and 1 MHz, making it suitable for low-noise reference and transient suppression where capacitive loading and thermal drift must be controlled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.1 V to 3.5 V @ IZT = 5 mA - ensures ±0.2 V regulation window for 3.3 V rail stabilization |
| Power Dissipation | 300 mW @ TA = 25°C - supports continuous operation in compact handheld PCBs without forced cooling |
| Zener Impedance (ZZT) | 95 Ω max @ IZT = 5 mA - limits output voltage variation under load transients in reference circuits |
| Leakage Current (IR) | <5 µA @ VR = 1.0 V - minimizes standby power loss in battery-powered devices |
| ESD Rating | Class 3 (>16 kV) per HBM - enables direct integration into exposed I/O lines without external protection |
| Operating Temperature | −65°C to +150°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
SZMM3Z3V3T1G is housed in a Pb−free SOD−323 surface-mount package (Case 477, Style 1), measuring 1.7 mm × 1.25 mm × 0.9 mm with cathode indicated by a polarity band. Mounting is orientation-agnostic and compatible with standard reflow profiles (260°C for 10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener anode connection point in reverse-bias configuration | Connected to regulated voltage node; polarity band identifies this terminal for correct PCB placement |
| 2 (Anode) | Zener cathode connection point in reverse-bias configuration | Typically tied to ground or lower-potential rail; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 Qualified | Validated for automotive applications including infotainment power rails and sensor interface protection |
| Low Profile (0.9 mm height) | Enables stacking under shields or integration into ultra-thin mobile modules without mechanical interference |
| 450 pF Capacitance @ 0 V | Minimizes signal distortion in RF-coupled bias networks while retaining effective AC bypass capability |
| −3.5 mV/°C Tempco | Predictable voltage drift allows compensation in precision analog front-ends using simple linear correction |
| UL 94 V−0 Flammability | Meets safety requirements for enclosed consumer and industrial enclosures without additional flame-retardant coating |
Applications
| Smartphone Power Management | Automotive Cabin Sensors |
|---|---|
|
Use Scenario: Providing stable 3.3 V reference for ADCs and LDO feedback networks in battery-powered handsets. IC Role / Device Role / Timing Role: Shunt voltage reference and overvoltage clamp for PMIC monitoring circuits. Use Value: Tight 3.3 V tolerance and low leakage ensure accurate sensor readings and extended battery life. |
Use Scenario: Protecting I²C bus lines and microcontroller GPIOs from load-dump transients in HVAC control modules. IC Role / Device Role / Timing Role: Transient voltage suppressor and rail clamp for 3.3 V digital interfaces. Use Value: 16 kV HBM ESD rating and AEC−Q101 qualification eliminate need for secondary protection components. |
| Industrial IoT Edge Node | Medical Wearable Monitoring |
|
Use Scenario: Stabilizing reference voltage for low-power wireless SoCs operating across wide ambient temperatures. IC Role / Device Role / Timing Role: Precision voltage regulator for RF transceiver bias and sensor excitation circuits. Use Value: −65°C to +150°C range and predictable −3.5 mV/°C drift support field-deployed reliability without calibration. |
Use Scenario: Regulating voltage for optical heart-rate sensor analog front-end in compact wrist-worn devices. IC Role / Device Role / Timing Role: Low-noise DC reference source with minimal capacitive loading on photodiode amplifier inputs. Use Value: 450 pF capacitance avoids phase margin degradation in transimpedance amplifier feedback loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B3V3,115 | 300 mW SOD-323, 3.3 V ±5%, ZZT = 90 Ω @ 5 mA, non-AEC-Q101 | Lacks automotive qualification; suitable for commercial-grade wearables and consumer portables | Select when AEC−Q101 compliance is not required and cost sensitivity outweighs qualification needs |
| MMSZ5226B-TP | 500 mW SOD-123, 3.3 V ±5%, ZZT = 130 Ω @ 20 mA, higher power but larger footprint | Requires more PCB area; better for higher-current clamping but incompatible with ultra-dense layouts | Select when higher surge energy handling is needed and SOD−323 size constraint does not apply |
Compared with BZX384-B3V3,115 and MMSZ5226B-TP, SZMM3Z3V3T1G uniquely combines AEC−Q101 qualification, 0.9 mm profile, and tight 3.1–3.5 V Zener range - making it optimal for automotive and miniaturized medical designs where regulatory compliance and space are co-constrained.
Availability
SZMM3Z3V3T1G is available at Aetrix Electronics and suitable for smartphone power management, automotive cabin sensors, and industrial IoT edge nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SZMM3Z3V3T1G 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, and intelligent edge applications.
SZMM3Z3V3T1G belongs to the MM3ZxxxT1G/SZMM3ZxxxT1G series - engineered specifically for high-reliability voltage regulation in space-constrained, thermally demanding environments such as automotive ECUs and portable medical devices.
FAQ
What is the Zener voltage tolerance of SZMM3Z3V3T1G?
The SZMM3Z3V3T1G has a nominal Zener voltage of 3.3 V with a guaranteed range of 3.1 V to 3.5 V at IZT = 5 mA and TA = 25°C. This ±0.2 V tolerance supports precise 3.3 V rail regulation in low-voltage microcontroller and sensor applications without requiring post-production trimming.
Is SZMM3Z3V3T1G suitable for automotive applications?
Yes, SZMM3Z3V3T1G is AEC−Q101 qualified and PPAP capable, with full traceability and process controls meeting automotive requirements. Its −65°C to +150°C operating range, 16 kV HBM ESD rating, and Pb−free SOD−323 package make it appropriate for under-hood and cabin electronics including body control modules and sensor interfaces.
What is the maximum power dissipation for SZMM3Z3V3T1G at 85°C ambient?
At TA = 85°C, SZMM3Z3V3T1G's power dissipation is derated linearly from 300 mW at 25°C using 2.4 mW/°C. The calculation yields 300 mW − (85 − 25) × 2.4 mW = 156 mW - confirming safe operation in thermally stressed PCB locations like near power converters or processors.
How is polarity identified on the SZMM3Z3V3T1G package?
SZMM3Z3V3T1G uses a cathode-indicating polarity band on the SOD−323 case. Pin 1 (cathode) is marked with a visible band; Pin 2 (anode) is unmarked. This matches the standard SOD−323 marking convention and ensures correct orientation during automated placement and manual inspection.
Does SZMM3Z3V3T1G require external series resistance in typical applications?
Yes, SZMM3Z3V3T1G requires a current-limiting resistor to maintain IZ within its specified 5 mA test condition and avoid exceeding 300 mW dissipation. For a 5 V input rail, a 330 Ω resistor sets nominal Zener current near 5.2 mA - balancing regulation accuracy, thermal margin, and stability per the device's dynamic impedance profile.
SZMM3Z3V3T1G 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):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 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
SZMM3Z3V3T1G FAQ
1.How can I place an order for SZMM3Z3V3T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z3V3T1G 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 SZMM3Z3V3T1G reliable?
The price and inventory of SZMM3Z3V3T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z3V3T1G is usually 5 days.
3.What payment methods are accepted for SZMM3Z3V3T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z3V3T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z3V3T1G?
SZMM3Z3V3T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z3V3T1G 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 SZMM3Z3V3T1G?
For technical support, including SZMM3Z3V3T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z3V3T1G requirements.
6.How does Aetrix verify that SZMM3Z3V3T1G is sourced from the original manufacturer or authorized distributors?
All SZMM3Z3V3T1G 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 SZMM3Z3V3T1G meets industry standards.
7.What is the process for return or replacement of SZMM3Z3V3T1G?
All SZMM3Z3V3T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z3V3T1G, 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 SZMM3Z3V3T1G part is unused and in its original packaging.
Return procedure for SZMM3Z3V3T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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