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onsemi MMSZ4691T1
- Part No.:
- MMSZ4691T1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4691T1.pdf
- Description:
- DIODE ZENER 6.2V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,532
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Product details
Overview
MMSZ4691T1 from onsemi is a 6.2 V ±5% Zener voltage regulator diode in SOD−123 package, rated for 500 mW power dissipation at 75°C, with 50 µA test current (IZT), 10 µA reverse leakage at 5 V (IR), and 150°C maximum junction temperature - used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the MMSZ4691T1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, ESD robustness (Class 3, >16 kV HBM), and direct alternatives for voltage regulation in space-constrained PCB designs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its nominal Zener voltage of 6.2 V is specified at IZT = 50 µA, with dynamic impedance (ZZT) optimized for low-noise reference applications.
The device features a temperature coefficient near zero at ~6 V (per Figure 1), enabling stable regulation across −55°C to +150°C. Thermal resistance from junction-to-lead is 150°C/W, supporting reliable operation on FR-4/FR-5 boards with proper layout and copper pour.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.89 V min / 6.2 V nom / 6.51 V max @ IZT = 50 µA - defines tight regulation window for 6.2 V reference design |
| Power Dissipation (PD) | 500 mW @ TL = 75°C, derated 6.7 mW/°C above - sets thermal limit for continuous operation on standard PCBs |
| Reverse Leakage (IR) | 10 µA max @ VR = 5 V - ensures minimal quiescent current in standby or battery-powered circuits |
| Junction Temp Range | −55°C to +150°C - supports automotive under-hood and industrial control environments |
| ESD Rating | Class 3 (>16 kV) per HBM - provides robust handling during automated assembly and field operation |
| Package | SOD−123 (1.60 × 2.69 × 1.16 mm) - enables high-density placement and compatibility with standard pick-and-place equipment |
Pinout & Package
SOD−123 surface-mount package with cathode indicated by polarity band; 2-terminal construction optimized for automated board assembly and high-density layouts.
| 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 regulation in ultra-low-power sensor biasing and IoT wake-up circuits |
| Pb-free & RoHS compliant | Meets global environmental compliance requirements without sacrificing thermal or electrical performance |
| Optimized thermal resistance | RJL = 150°C/W allows higher sustained power delivery than comparable SOD-323 devices |
| High ESD immunity | Class 3 (>16 kV HBM) eliminates need for external transient suppressors in handheld and portable designs |
Applications
| Portable Sensor Biasing | USB Power Rail Clamping |
|---|---|
Use Scenario: Providing stable 6.2 V reference for analog front-end amplifiers in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Precision voltage reference and current-limiting element in op-amp feedback networks. Use Value: Tight 5% VZ tolerance and low IR ensure <1% reference drift over temperature and battery discharge cycles. |
Use Scenario: Protecting 5 V USB data lines from ESD events and transient overvoltage during hot-plug insertion. IC Role / Device Role / Timing Role: Low-capacitance clamping diode placed between D+ and ground. Use Value: 10 µA IR at 5 V prevents signal loading while 16 kV HBM rating meets IEC 61000-4-2 Level 4 compliance. |
| Industrial PLC Input Conditioning | Automotive Cabin Control Reference |
Use Scenario: Scaling and conditioning 24 V field signals down to 0–5 V ADC input range in programmable logic controllers. IC Role / Device Role / Timing Role: Zener-based voltage divider stabilizer with series resistor for current limiting. Use Value: −55°C to +150°C operating range and AEC-Q101 qualification (via SZ variant) support harsh factory-floor environments. |
Use Scenario: Generating stable 6.2 V supply for microcontroller reset circuitry and LED backlight dimming in infotainment systems. IC Role / Device Role / Timing Role: Primary voltage reference for RC-based reset timing and PWM reference generation. Use Value: Near-zero TC at 6.2 V minimizes reset threshold drift across cabin temperature extremes (−40°C to +85°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V2 | Same 6.2 V nominal Zener, but SOT-23 package (larger footprint, higher RJA = 300°C/W) | Less suitable for ultra-dense layouts; higher thermal resistance limits power handling on small pads | Select when existing SOT-23 footprint reuse is prioritized over miniaturization |
| MMSZ4691T1G | Identical electrical specs and SOD−123 package; "G" suffix denotes Pb-free compliance (same as MMSZ4691T1 per onsemi documentation) | No functional difference; "G" and non-"G" variants share identical marking (CA), thermal, and electrical behavior | Prefer MMSZ4691T1G for new designs requiring explicit RoHS documentation traceability |
Compared with BZX84-C6V2 and MMSZ4691T1G, the MMSZ4691T1 offers identical Zener performance in the smallest standardized 2-lead SMD package, with superior thermal efficiency over SOT-23 and full backward compatibility with legacy "G"-suffixed production lots.
Availability
MMSZ4691T1 is available at Aetrix Electronics and suitable for portable sensor biasing, USB power rail clamping, and industrial PLC input conditioning requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for MMSZ4691T1 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, and cloud infrastructure markets.
The MMSZ4xxxT1G series was designed for high-reliability, low-power voltage regulation in space-constrained surface-mount applications - targeting cost-sensitive, high-volume consumer, industrial, and automotive electronics where stability, ESD robustness, and thermal efficiency are critical.
FAQ
What is the exact Zener voltage tolerance for MMSZ4691T1?
The MMSZ4691T1 has a guaranteed Zener voltage range of 5.89 V (minimum) to 6.51 V (maximum) at IZT = 50 µA and TA = 25°C, corresponding to a ±5% tolerance around the nominal 6.2 V value. This tolerance remains valid across the full operating temperature range of −55°C to +150°C, as confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet.
Is MMSZ4691T1 RoHS compliant and lead-free?
Yes, the MMSZ4691T1 is Pb-free and RoHS compliant, as explicitly stated in the datasheet's Features section and Mechanical Characteristics. The "T1" suffix aligns with onsemi's Pb-free packaging standard, and the device carries the required environmental certifications for global market deployment without restriction.
What is the maximum power dissipation for MMSZ4691T1 on a standard FR-4 PCB?
MMSZ4691T1 delivers 500 mW maximum power dissipation when mounted on an FR-5 board at lead temperature (TL) of 75°C, with linear derating of 6.7 mW/°C above that point. On typical FR-4 boards with minimal copper, actual usable power is slightly lower due to higher thermal resistance - design margin should include junction temperature calculation using RJL = 150°C/W.
Does MMSZ4691T1 have AEC-Q101 qualification?
The base MMSZ4691T1 is not AEC-Q101 qualified; however, its automotive-grade counterpart SZMMSZ4691T1G is explicitly listed as AEC-Q101 qualified and PPAP capable per the datasheet's Features section. For automotive applications requiring qualification, the SZ-prefixed variant must be selected - MMSZ4691T1 remains suitable for industrial and commercial use.
What is the reverse leakage current of MMSZ4691T1 at 5 V?
The reverse leakage current (IR) of MMSZ4691T1 is specified as 10 µA maximum at VR = 5 V and TA = 25°C. This low leakage supports energy-efficient operation in always-on circuits such as real-time clock backup supplies and low-power sensor bias rails where standby current must remain below 100 µA.
MMSZ4691T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 5 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ4691T1 FAQ
1.How can I place an order for MMSZ4691T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4691T1 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 MMSZ4691T1 reliable?
The price and inventory of MMSZ4691T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4691T1 is usually 5 days.
3.What payment methods are accepted for MMSZ4691T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4691T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4691T1?
MMSZ4691T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4691T1 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 MMSZ4691T1?
For technical support, including MMSZ4691T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4691T1 requirements.
6.How does Aetrix verify that MMSZ4691T1 is sourced from the original manufacturer or authorized distributors?
All MMSZ4691T1 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 MMSZ4691T1 meets industry standards.
7.What is the process for return or replacement of MMSZ4691T1?
All MMSZ4691T1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4691T1, 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 MMSZ4691T1 part is unused and in its original packaging.
Return procedure for MMSZ4691T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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