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onsemi SZMM5Z4685T1G
- Part No.:
- SZMM5Z4685T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z4685T1G.pdf
- Description:
- DIODE ZENER 3.6V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:5,965
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Product details
Overview
SZMM5Z4685T1G from onsemi is a 3.6 V nominal Zener voltage regulator diode in SOD−523 package, rated for 500 mW power dissipation at TL = 75°C, with 50 µA test current (IZT), 2 V reverse leakage voltage (VR), and 7.5 µA reverse leakage current (IR) - used for precision low-voltage reference and overvoltage clamping in space-constrained portable electronics.
For engineers reviewing the SZMM5Z4685T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 3.6 V ±5% Zener tolerance, −55°C to +150°C operating range, 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 silicon Zener diode optimized for stable voltage regulation under reverse bias, with specified Zener voltage measured at IZT = 50 µA and thermal equilibrium at TL = 30°C ±1°C. Its temperature coefficient is near zero around 3.6 V, minimizing drift across −55°C to +150°C.
The SOD−523 package enables automated placement and reflow soldering per JEDEC standards, with 260°C/10s maximum soldering temperature and UL 94 V−0 flammability rating. It features cathode polarity band marking and Pb−Free, RoHS-compliant construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.42 V (min) to 3.78 V (max) at IZT = 50 µA - defines tight 3.6 V ±5% regulation window for low-voltage reference stability |
| Power Dissipation (PD) | 500 mW on FR−5 board at TL = 75°C - supports continuous operation in thermally constrained handheld PCBs |
| Reverse Leakage (IR) | 7.5 µA max at VR = 2 V - ensures minimal quiescent current draw in battery-powered standby circuits |
| ESD Rating | Class 3 (>16 kV) per HBM - provides robust handling integrity during automated assembly and end-use electrostatic environments |
| Operating Temp | −55°C to +150°C - validated for automotive under-hood and industrial embedded applications requiring wide thermal margin |
| AEC−Q101 | Qualified and PPAP capable - confirms reliability compliance for automotive electronics supply chain requirements |
Pinout & Package
SZMM5Z4685T1G uses the SOD−523 surface-mount package (1.20 × 0.80 × 0.60 mm), void-free thermosetting plastic case with corrosion-resistant, solderable finish and cathode polarity band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low IZT Test Current | 50 µA enables stable Zener voltage measurement without excessive bias current in ultra-low-power systems |
| Small Outline Package | SOD−523 footprint saves >60% board area vs. SOD−123, critical for cellular phone and wearable PCB real estate |
| Automated Assembly Optimized | Transfer-molded case geometry and lead-free finish ensure consistent pick-and-place yield and reflow reliability |
| High ESD Robustness | 16 kV HBM rating eliminates need for external ESD protection in front-end I/O clamping applications |
Applications
| Smartphone Power Rail Clamping | Automotive Cabin Controller Reference |
|---|---|
Use Scenario: Protecting 3.3 V I/O lines from transient overvoltage events in LTE modem modules. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing fast-response voltage clamping at signal interface nodes. Use Value: 3.6 V Zener threshold aligns with 3.3 V rail tolerance margins, limiting overshoot to <400 mV while drawing <8 µA leakage at 2 V. |
Use Scenario: Generating stable 3.6 V reference for ADC input scaling in HVAC control units. IC Role / Device Role / Timing Role: Precision voltage reference source with minimal temperature-induced drift over −40°C to +125°C. Use Value: Near-zero TC at 3.6 V ensures reference error stays within ±0.5% across full automotive temperature range. |
| Wearable Fitness Tracker Sensor Bias | Industrial IoT Edge Node Voltage Clamp |
Use Scenario: Biasing analog front-end of optical heart-rate sensor operating from coin-cell supply. IC Role / Device Role / Timing Role: Low-current Zener reference establishing fixed bias point for photodiode amplifier stage. Use Value: 7.5 µA IR at 2 V enables >10-year battery life in always-on sensing mode with sub-100 nA total quiescent load. |
Use Scenario: Overvoltage protection on RS-485 transceiver VCC line exposed to field wiring surges. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping supply rail during EFT bursts and inductive switching events. Use Value: 500 mW PD rating sustains 100 ms surge events up to 3.8 V without degradation, verified per IEC 61000-4-4 Level 3. |
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-C3V6 | 3.6 V ±5%, SOD-323 package (1.7 × 1.3 mm), 300 mW PD, 5 µA IR @ 2 V | Lower power rating and larger footprint limit use in ultra-dense layouts; better leakage performance | Select when lower leakage dominates over board area constraints and thermal derating is less critical |
| MMSZ4685T1G | 3.6 V ±5%, SOD-123 package (3.7 × 1.6 mm), 500 mW PD, 7.5 µA IR @ 2 V, same Zener curve | Larger footprint increases PCB area by 3.5× but improves thermal mass and manual rework accessibility | Select when higher thermal robustness or hand-soldering feasibility is prioritized over miniaturization |
Compared with BZX584-C3V6 and MMSZ4685T1G, SZMM5Z4685T1G uniquely balances ultra-small SOD−523 size, AEC−Q101 qualification, and 500 mW power capability - making it optimal for automotive-grade, space-limited designs where both reliability and density are non-negotiable.
Availability
SZMM5Z4685T1G is available at Aetrix Electronics and suitable for smartphone power rail clamping, automotive cabin controller reference, and wearable fitness tracker sensor bias requiring stable component supply across high-volume production cycles.
Supply support for SZMM5Z4685T1G 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.
SZMM5Z4685T1G belongs to the MM5Z4xxx/SZMM5Z4xxx series - a family of AEC−Q101-qualified Zener diodes engineered specifically for compact, high-reliability voltage regulation in automotive infotainment, ADAS subsystems, and portable electronics.
FAQ
What is the Zener voltage tolerance of SZMM5Z4685T1G?
The SZMM5Z4685T1G has a nominal Zener voltage of 3.6 V with a guaranteed tolerance of ±5%, corresponding to a minimum of 3.42 V and maximum of 3.78 V when tested at IZT = 50 µA and thermal equilibrium at TL = 30°C ±1°C. This tight tolerance ensures predictable clamping behavior in precision reference and protection circuits where voltage margin is critical.
Is SZMM5Z4685T1G qualified for automotive applications?
Yes, SZMM5Z4685T1G 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 −55°C to +150°C operating range, 16 kV HBM ESD rating, and Pb−Free/RoHS construction meet stringent automotive reliability standards.
What is the maximum reverse leakage current for SZMM5Z4685T1G?
The maximum reverse leakage current (IR) for SZMM5Z4685T1G is 7.5 µA when measured at VR = 2 V and TA = 25°C. This low leakage supports ultra-low-power operation in battery-powered devices such as wearables and remote sensors, where standby current must remain below 10 µA to extend operational lifetime.
Can SZMM5Z4685T1G be used in place of MM5Z4685T1G?
Yes, SZMM5Z4685T1G is the automotive-grade variant of MM5Z4685T1G, sharing identical electrical specifications including Zener voltage, power rating, and leakage current. The primary differences are enhanced process controls, extended qualification testing, and PPAP documentation - making SZMM5Z4685T1G suitable for automotive use where MM5Z4685T1G is not certified.
What is the thermal resistance of SZMM5Z4685T1G?
The junction-to-ambient thermal resistance (RJA) of SZMM5Z4685T1G is 250°C/W, measured via infrared scan method on FR−5 board. This value informs thermal design for sustained operation: at 500 mW dissipation, junction temperature rise above ambient is ~125°C, requiring careful layout and thermal relief to maintain TJ ≤ +150°C under worst-case conditions.
SZMM5Z4685T1G 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):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
SZMM5Z4685T1G FAQ
1.How can I place an order for SZMM5Z4685T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z4685T1G 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 SZMM5Z4685T1G reliable?
The price and inventory of SZMM5Z4685T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z4685T1G is usually 5 days.
3.What payment methods are accepted for SZMM5Z4685T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z4685T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z4685T1G?
SZMM5Z4685T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z4685T1G 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 SZMM5Z4685T1G?
For technical support, including SZMM5Z4685T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z4685T1G requirements.
6.How does Aetrix verify that SZMM5Z4685T1G is sourced from the original manufacturer or authorized distributors?
All SZMM5Z4685T1G 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 SZMM5Z4685T1G meets industry standards.
7.What is the process for return or replacement of SZMM5Z4685T1G?
All SZMM5Z4685T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z4685T1G, 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 SZMM5Z4685T1G part is unused and in its original packaging.
Return procedure for SZMM5Z4685T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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