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onsemi SZMM5Z3V3T5G
- Part No.:
- SZMM5Z3V3T5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z3V3T5G.pdf
- Description:
- DIODE ZENER 3.3V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:7,750
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Product details
Overview
SZMM5Z3V3T5G from onsemi is a 3.3 V ±5% Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with 95 Ω max Zener impedance at 5 mA test current and <5 µA reverse leakage at 1 V, used for precision voltage clamping and ESD protection in space-constrained portable electronics.
For engineers reviewing the SZMM5Z3V3T5G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (250 °C/W), AEC-Q101 qualification, 16 kV HBM ESD rating, and SOD-523 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference and transient suppressor, leveraging silicon PN junction Zener breakdown at 3.3 V nominal. Its low 0.7 mm body height and 1.20 mm × 0.80 mm outline enable integration into ultra-thin mobile handsets and wearable sensors where board area is constrained.
The SZ prefix confirms automotive-grade traceability, PPAP capability, and AEC-Q101 qualification-critical for under-hood and infotainment subsystems. Its 100% matte tin lead finish supports lead-free reflow up to 260 °C and meets MSL 1 moisture sensitivity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 3.3 V nominal, 3.1–3.5 V range at 5 mA - ensures stable clamping within ±5% tolerance for 3.3 V rail protection |
| Power Rating | 500 mW at 25 °C, derated 4.0 mW/°C above - defines maximum continuous dissipation on FR-4 board |
| Zener Impedance | 95 Ω max at IZT = 5 mA - determines regulation stiffness and AC ripple suppression capability |
| Reverse Leakage | ≤5 µA at VR = 1 V - minimizes standby current in battery-powered systems |
| ESD Rating | Class 3 (>16 kV) per HBM - provides robust electrostatic discharge immunity without external TVS |
| Thermal Resistance | 250 °C/W junction-to-ambient - sets temperature rise under load; requires thermal pad design for sustained power |
| Package | SOD-523 (Case 502) - 1.20 mm × 0.80 mm × 0.70 mm footprint ideal for 0201-class layout density |
Pinout & Package
SOD-523 surface-mount package with cathode marked by polarity band; 2-terminal construction; void-free thermosetting plastic case meeting UL 94 V-0; 100% matte tin lead finish; qualified for 260 °C reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; accepts reverse bias during Zener conduction |
| 2 (Unbanded End) | Anode | Ground or reference return path; completes current loop during clamping operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including infotainment and body control modules |
| 16 kV HBM ESD Rating | Eliminates need for discrete ESD protection in front-end I/O lines of portable devices |
| 0.7 mm Low Profile | Enables stacking under connectors or beneath shields in slim-profile handheld designs |
| Pb-Free & RoHS Compliant | Meets global environmental regulations and supports lead-free assembly processes |
| MSL 1 Moisture Sensitivity | Allows indefinite floor life without dry pack or baking prior to reflow soldering |
Applications
| USB Interface Protection | Smartphone Power Rail Clamping |
|---|---|
Use Scenario: Protecting USB D+/D− lines from ESD events and overvoltage transients during hot-plug insertion. IC Role / Device Role / Timing Role: Bidirectional voltage clamp limiting signal swing to ±3.3 V while preserving signal integrity. Use Value: Prevents damage to USB PHY transceivers using only 0.7 mm height and no additional PCB area. | Use Scenario: Stabilizing 3.3 V LDO output against load dump and supply ripple in cellular baseband processors. IC Role / Device Role / Timing Role: Shunt regulator absorbing transient energy to maintain rail stability during burst-mode switching. Use Value: Delivers 500 mW clamping capacity in 1.20 mm × 0.80 mm footprint-reducing BOM count vs. discrete TVS + Zener combos. |
| Automotive Infotainment Display Bias | Wearable Sensor Reference Clamp |
Use Scenario: Providing stable 3.3 V bias for OLED display driver ICs in vehicle dashboards exposed to load dump pulses. IC Role / Device Role / Timing Role: Precision voltage reference and transient suppressor maintaining display contrast and timing accuracy. Use Value: AEC-Q101 qualification ensures reliability across −40 °C to +125 °C ambient with no derating loss. | Use Scenario: Clamping ADC reference inputs in hearable devices subject to handling ESD and battery voltage fluctuations. IC Role / Device Role / Timing Role: Low-leakage (<5 µA) shunt element preserving measurement accuracy during sleep mode. Use Value: 0.7 mm height enables placement directly adjacent to sensor ICs without interfering with flex cable routing. |
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-C3V3 | 3.3 V ±5%, SOD-523, 300 mW rating, 120 Ω Zz - lower power and higher impedance than SZMM5Z3V3T5G | Not AEC-Q101 qualified; limited to consumer portables, not automotive | Select when cost sensitivity outweighs automotive compliance and 500 mW headroom |
| MMSZ5226BT1G | 3.3 V ±5%, SOD-123, 500 mW, 28 Ω Zz - same power but larger 2.7 mm × 1.6 mm footprint and lower impedance | Higher thermal mass but incompatible with 0201-class density constraints | Select when board space allows larger package and tighter regulation (28 Ω vs. 95 Ω) is prioritized |
Compared with BZX584-C3V3 and MMSZ5226BT1G, the SZMM5Z3V3T5G uniquely combines AEC-Q101 qualification, 500 mW rating, and minimal 1.20 mm × 0.80 mm SOD-523 footprint-making it optimal for automotive and ultra-dense portable designs where both reliability and size are non-negotiable.
Availability
SZMM5Z3V3T5G is available at Aetrix Electronics and suitable for USB interface protection, smartphone power rail clamping, and automotive infotainment display bias requiring stable component supply across production lifecycles.
Supply support for SZMM5Z3V3T5G 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MM5Z/SZMM5Z series targets compact, high-reliability voltage regulation-designed specifically for space-constrained, mission-critical portable and automotive electronics needing precise, low-profile Zener clamping.
FAQ
What is the Zener voltage tolerance of SZMM5Z3V3T5G?
The SZMM5Z3V3T5G has a nominal Zener voltage of 3.3 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 3.1 V and 3.5 V when tested at 5 mA (IZT). This tolerance is confirmed in the Electrical Characteristics table on page 3 of the onsemi datasheet, and applies under standard 25 °C ambient conditions.
Is SZMM5Z3V3T5G qualified for automotive use?
Yes, SZMM5Z3V3T5G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the datasheet's Specification Features section. The "SZ" prefix denotes automotive-grade traceability, process control, and stress testing-making SZMM5Z3V3T5G suitable for under-hood and cabin electronics where reliability across extended temperature ranges is required.
What is the maximum power dissipation of SZMM5Z3V3T5G at 85 °C ambient?
At 85 °C ambient, SZMM5Z3V3T5G's maximum power dissipation is 260 mW. This is calculated from its 500 mW rating at 25 °C and 4.0 mW/°C linear derating: 500 mW − (85 − 25) × 4.0 mW = 260 mW. Derating follows the curve in Figure 1 of the datasheet and assumes mounting on an FR-4 board with 1 cm² copper pad.
Does SZMM5Z3V3T5G have a defined polarity marking?
Yes, SZMM5Z3V3T5G uses Style 1 marking per the Mechanical Case Outline diagram: Pin 1 (cathode) is identified by a polarity band on the SOD-523 package body. The datasheet specifies "PIN 1. CATHODE (POLARITY BAND)" and shows the band adjacent to terminal 1 in the generic marking diagram on page 1 of the mechanical drawing.
What is the reverse leakage current specification for SZMM5Z3V3T5G?
SZMM5Z3V3T5G exhibits ≤5 µA reverse leakage current (IR) at VR = 1 V, as specified in the Electrical Characteristics table on page 3 of the onsemi datasheet. This low leakage supports battery-sensitive applications such as wearables and always-on sensors where standby current must be minimized.
SZMM5Z3V3T5G 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):
- 3.3 V
- Tolerance:
- ±6.06%
- Power - Max:
- 500 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
SZMM5Z3V3T5G FAQ
1.How can I place an order for SZMM5Z3V3T5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z3V3T5G 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 SZMM5Z3V3T5G reliable?
The price and inventory of SZMM5Z3V3T5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z3V3T5G is usually 5 days.
3.What payment methods are accepted for SZMM5Z3V3T5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z3V3T5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z3V3T5G?
SZMM5Z3V3T5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z3V3T5G 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 SZMM5Z3V3T5G?
For technical support, including SZMM5Z3V3T5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z3V3T5G requirements.
6.How does Aetrix verify that SZMM5Z3V3T5G is sourced from the original manufacturer or authorized distributors?
All SZMM5Z3V3T5G 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 SZMM5Z3V3T5G meets industry standards.
7.What is the process for return or replacement of SZMM5Z3V3T5G?
All SZMM5Z3V3T5G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z3V3T5G, 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 SZMM5Z3V3T5G part is unused and in its original packaging.
Return procedure for SZMM5Z3V3T5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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