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onsemi SZMM5Z6V2ST1G
- Part No.:
- SZMM5Z6V2ST1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z6V2ST1G.pdf
- Description:
- DIODE ZENER 6.2V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SZMM5Z6V2ST1G from onsemi is a 6.2 V ±4.8% Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation, with 100 Ω max Zener impedance at 5 mA test current and 185 pF capacitance at 0 V/1 MHz - used for precision voltage regulation and ESD protection in space-constrained portable electronics.
For engineers reviewing the SZMM5Z6V2ST1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, AEC-Q101 qualification status, and direct alternative part comparisons for automotive and high-density PCB designs.
Technical Context
This Zener diode operates in reverse breakdown to clamp transient overvoltage and stabilize reference voltages. It features tight 5% tolerance (6.06 V to 6.33 V), low 10 Ω typical dynamic impedance at IZK = 1 mA, and Class 3 HBM ESD rating (>16 kV).
Designed for surface-mount assembly on FR-4 boards, it supports reflow up to 260 °C (MSL 1), has junction-to-ambient thermal resistance of 250 °C/W, and functions across −65 °C to +150 °C operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.06 V min to 6.33 V max at 5 mA - defines clamping threshold for overvoltage protection |
| Power Dissipation (PD) | 500 mW at 25 °C, derated 4.0 mW/°C above - sets maximum continuous safe power handling |
| Zener Impedance (ZZT) | 100 Ω max at IZT = 5 mA - determines regulation stiffness under load variation |
| Reverse Leakage (IR) | 3.0 μA max at VR = 4.0 V - ensures minimal quiescent current in standby mode |
| Capacitance (C) | 185 pF max at 0 V, 1 MHz - impacts high-frequency noise filtering capability |
| ESD Rating | Class 3 (>16 kV) per HBM - qualifies for direct interface with exposed I/O in handheld devices |
| Temperature Coefficient | +0.4 mV/°C at 5 mA - enables predictable drift compensation in temperature-sensitive references |
Pinout & Package
SOD-523 package: 1.20 mm × 0.80 mm body, 0.70 mm height, matte tin lead finish, void-free thermoset epoxy (UL 94 V-0). Mounting position unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output or protected node; reverse-biased during Zener operation |
| 2 | Anode | Connected to ground or lower-potential rail; completes conduction path during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Tight Zener Tolerance | ±4.8% (6.06–6.33 V) enables accurate voltage clamping without post-production trimming |
| Pb-Free & RoHS Compliant | 100% matte Sn finish meets global environmental compliance and lead-free reflow requirements |
| AEC-Q101 Qualified | Validated for automotive applications including infotainment power rails and sensor bias networks |
| Low Capacitance | 185 pF allows use in high-speed data line protection without signal integrity degradation |
| Small Outline | SOD-523 footprint saves >60% board area vs. SOD-123 - critical for ultra-thin mobile PCBs |
Applications
| Smartphone Power Management | Automotive Infotainment I/O Protection |
|---|---|
Use Scenario: Regulating 6.3 V supply rail for camera module analog front-end in LTE smartphones. IC Role / Device Role / Timing Role: Zener shunt regulator providing stable bias voltage and absorbing ESD transients on VBIAS line. Use Value: 185 pF capacitance avoids distortion of 100+ MHz image sensor clock signals routed nearby. | Use Scenario: Protecting USB 2.0 D+/D− lines against load-dump-induced surges in head unit PCBs. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor clamping to 6.33 V before damage occurs to PHY IC inputs. Use Value: AEC-Q101 qualification ensures reliability across −40 °C to +105 °C under vehicle vibration and thermal cycling. |
| Wearable Sensor Reference | Industrial IoT Edge Node |
Use Scenario: Generating precise 6.2 V reference for ADC in compact fitness tracker with optical heart-rate sensor. IC Role / Device Role / Timing Role: Voltage reference stabilizer compensating for battery voltage droop during pulse measurement bursts. Use Value: +0.4 mV/°C tempco allows software calibration over 0–50 °C operating range with <±10 mV error. | Use Scenario: Overvoltage protection on 5 V logic rail feeding RS-485 transceiver in factory-floor gateway device. IC Role / Device Role / Timing Role: Clamp diode limiting surge energy to <500 mJ during 2 kV EFT events per IEC 61000-4-4. Use Value: 500 mW power rating sustains 100 ms overvoltage without thermal runaway when paired with series current-limiting resistor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C6V2LT1G | Same 6.2 V nominal, ±5% tolerance; 350 mW rating; SOD-523 package; 200 pF capacitance | Lacks AEC-Q101 qualification; lower power rating limits surge energy absorption | Preferred for cost-sensitive consumer wearables where automotive qualification is unnecessary |
| MMSZ5234BT1G | 6.2 V nominal, ±5% tolerance; 500 mW rating; SOD-123 package; 220 pF capacitance; no AEC-Q101 | Larger 2.7 × 1.6 mm footprint; higher thermal resistance (350 °C/W); not automotive-qualified | Used where board space permits and legacy SOD-123 layout exists; unsuitable for new AEC-Q101 designs |
Compared with BZX584C6V2LT1G and MMSZ5234BT1G, SZMM5Z6V2ST1G offers tighter regulation (±4.8%), superior ESD robustness (>16 kV), and guaranteed automotive qualification - making it the only choice for next-generation infotainment and ADAS subsystems requiring zero-field failure risk.
Availability
SZMM5Z6V2ST1G is available at Aetrix Electronics and suitable for smartphone power management, automotive infotainment I/O protection, and wearable sensor reference applications requiring stable component supply and full traceability.
Supply support for SZMM5Z6V2ST1G 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.
SZMM5ZxxxST1G belongs to onsemi's automotive-grade Zener regulator family, engineered specifically for high-reliability voltage clamping and ESD protection in safety-critical and space-constrained electronic modules.
FAQ
What is the Zener voltage tolerance of SZMM5Z6V2ST1G?
The SZMM5Z6V2ST1G has a specified Zener voltage range of 6.06 V to 6.33 V at 5 mA test current, corresponding to ±4.8% tolerance. This tight tolerance is confirmed in the Electrical Characteristics table of the official onsemi datasheet Rev. 15 (April 2026), enabling precise voltage clamping without external trimming. The SZMM5Z6V2ST1G achieves this via process-controlled doping and laser trimming during manufacturing.
Is SZMM5Z6V2ST1G qualified for automotive use?
Yes, SZMM5Z6V2ST1G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the "Specification Features" section of the onsemi datasheet. The "SZ" prefix denotes automotive and other applications requiring unique site and control change requirements. This qualification covers temperature cycling, mechanical shock, and ESD testing per AEC standards - confirming suitability for infotainment, body control, and ADAS subsystems.
What is the maximum power dissipation for SZMM5Z6V2ST1G at 85 °C ambient?
At 85 °C ambient, SZMM5Z6V2ST1G's maximum power dissipation is 260 mW. This is calculated using the 500 mW rating at 25 °C and 4.0 mW/°C derating factor: 500 − (85 − 25) × 4.0 = 260 mW. The derating curve is shown in Figure 2 ("Steady State Power Derating") of the onsemi datasheet, and applies to FR-4 boards with 1 cm² copper pad.
Does SZMM5Z6V2ST1G have a defined polarity marking?
Yes, SZMM5Z6V2ST1G 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 device marking code "TE" appears adjacent to the band, and the "M" date code follows. This unambiguous cathode identification prevents reverse installation during automated placement - critical for functional safety in automotive PCBs.
What is the Zener impedance of SZMM5Z6V2ST1G at low current (1 mA)?
SZMM5Z6V2ST1G has a maximum Zener impedance (ZZK) of 10 Ω at IZK = 1 mA, as listed in the Electrical Characteristics table. This low dynamic impedance at knee current ensures stable regulation even under light-load conditions typical in sensor bias networks and reference dividers - a key advantage over general-purpose Zeners with ZZK > 50 Ω.
SZMM5Z6V2ST1G 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):
- 6.2 V
- Tolerance:
- ±6%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 4 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
SZMM5Z6V2ST1G FAQ
1.How can I place an order for SZMM5Z6V2ST1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z6V2ST1G 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 SZMM5Z6V2ST1G reliable?
The price and inventory of SZMM5Z6V2ST1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z6V2ST1G is usually 5 days.
3.What payment methods are accepted for SZMM5Z6V2ST1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z6V2ST1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z6V2ST1G?
SZMM5Z6V2ST1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z6V2ST1G 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 SZMM5Z6V2ST1G?
For technical support, including SZMM5Z6V2ST1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z6V2ST1G requirements.
6.How does Aetrix verify that SZMM5Z6V2ST1G is sourced from the original manufacturer or authorized distributors?
All SZMM5Z6V2ST1G 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 SZMM5Z6V2ST1G meets industry standards.
7.What is the process for return or replacement of SZMM5Z6V2ST1G?
All SZMM5Z6V2ST1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z6V2ST1G, 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 SZMM5Z6V2ST1G part is unused and in its original packaging.
Return procedure for SZMM5Z6V2ST1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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