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onsemi MM3Z22VB
- Part No.:
- MM3Z22VB
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
MM3Z22VB.pdf
- Description:
- DIODE ZENER 22V 200MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:8,139
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Product details
Overview
MM3Z22VB from onsemi is a 22 V ±2% Zener diode in SOD−323FL package, rated for 200 mW power dissipation, with 51 Ω typical Zener impedance at 5 mA test current and 0.045 µA maximum reverse leakage at 15.4 V. It provides precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the MM3Z22VB datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal behavior, package dimensions, and real-world use cases for stable voltage clamping and reference design.
Technical Context
The MM3Z22VB operates as a two-terminal silicon Zener diode optimized for stable reverse-biased breakdown at 22 V nominal, with tight ±2% tolerance (B-series). Its 595 °C/W junction-to-ambient thermal resistance reflects its ultra-small SOD−323FL footprint and low-power capability.
It is characterized at 25 °C with IZT = 5 mA, where VZ = 21.56–22.44 V and ZZT = 51 Ω max. Reverse leakage IR is specified at VR = 15.4 V (70% of VZ), limiting error in high-impedance bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 21.56 V min to 22.44 V max at 5 mA - defines precise clamping threshold for protection or reference |
| Power Dissipation (PD) | 200 mW - sets maximum continuous power handling in surface-mount layout |
| Zener Impedance (ZZT) | 51 Ω max at 5 mA - determines regulation stability under varying load current |
| Reverse Leakage (IR) | 0.045 µA max at 15.4 V - ensures minimal error in high-Z voltage divider or bias networks |
| Thermal Resistance (RJA) | 595 °C/W - indicates sensitivity to PCB copper area and ambient temperature rise |
| Forward Voltage (VF) | 1.0 V max at 10 mA - defines conduction drop when used in forward-biased ESD path |
Pinout & Package
SOD−323FL package: ultra-thin, leadless, matte tin–plated, Pb-free surface-mount case (Case 477AB), 1.7 mm × 1.25 mm × 0.95 mm body size, cathode marked by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Forward conduction terminal / low-side connection | Connected to ground or lower potential in shunt regulator configuration |
| 2 (Cathode) | Zener breakdown terminal / high-side connection | Connected to supply rail or signal node requiring clamping; marked with band |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables accurate voltage references without post-calibration in space-constrained designs |
| 200 mW power rating | Supports low-power regulation in battery-operated sensors and IoT edge nodes |
| SOD−323FL package | Reduces board area by >50% vs. SOD-123 while maintaining hand-solderability |
| Pb-free matte tin finish | Ensures RoHS compliance and reliable solder joint formation with standard reflow profiles |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing ADC reference voltage in 4–20 mA loop-powered transmitters. IC Role / Device Role / Timing Role: Shunt voltage reference providing 22 V regulated bias for op-amp rail-splitting network. Use Value: Tight ±2% VZ tolerance minimizes full-scale error across temperature; low IR prevents loading of high-impedance divider. | Use Scenario: Clamping transient surges on USB VBUS line during hot-plug events. IC Role / Device Role / Timing Role: Low-capacitance Zener clamp placed between VBUS and GND to limit voltage to safe level. Use Value: 22 V breakdown protects downstream 5 V regulators; 200 mW rating handles short-duration ESD pulses per IEC 61000-4-2. |
| Low-Power MCU Reset Circuit | Automotive Cabin Control Panel Reference |
Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers in energy-harvesting systems. IC Role / Device Role / Timing Role: Precision Zener in resistor-divider feeding supervisor IC input. Use Value: 0.045 µA IR at 15.4 V ensures negligible current draw from weak energy sources; SOD−323FL enables compact layout near MCU. | Use Scenario: Providing stable 22 V reference for LED backlight dimming control in infotainment displays. IC Role / Device Role / Timing Role: Voltage reference for PWM comparator feedback path in DC-DC converter. Use Value: 51 Ω ZZT maintains regulation accuracy despite load transients; 150 °C max TJ supports under-dash thermal environment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B22 | Same 22 V ±2%, but in SOD-323 package (not FL variant); RJA = 625 °C/W | Slightly higher thermal resistance limits power derating at elevated ambient | Acceptable where board space allows marginally larger footprint and thermal budget permits |
| MMSZ5247B | 22 V ±5% tolerance; SOD-123 package; PD = 500 mW; ZZT = 30 Ω max at 20 mA | Looser tolerance trades accuracy for higher power handling and lower dynamic impedance | Preferred when higher surge energy absorption is required and ±5% VZ is acceptable |
Compared with BZX384-B22 and MMSZ5247B, the MM3Z22VB offers tighter voltage tolerance in the smallest standardized Zener footprint, making it optimal for space-constrained, precision-biased analog circuits where thermal management is controlled.
Availability
MM3Z22VB is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB port protection, and low-power MCU reset circuits requiring stable component supply and consistent ±2% voltage accuracy.
Supply support for MM3Z22VB 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.
The MM3Z22VB belongs to the MM3Z2V4B–MM3Z75VB Zener diode family, engineered for high-precision, low-power voltage regulation and transient suppression in miniaturized SMT designs.
FAQ
What is the Zener voltage tolerance of MM3Z22VB?
The MM3Z22VB has a Zener voltage tolerance of ±2% at 25 °C, with a specified range of 21.56 V to 22.44 V at 5 mA test current. This tight tolerance is confirmed in the Electrical Characteristics table of the official onsemi datasheet Rev. 3 (August 2023) and applies specifically to the MM3Z22VB marking code "PZ". The MM3Z22VB is part of the B-series, which guarantees this tolerance across production lots.
What package type does MM3Z22VB use?
The MM3Z22VB uses the SOD−323FL package (Case 477AB), a Pb-free, matte tin–plated, ultra-thin surface-mount outline measuring 1.7 mm × 1.25 mm × 0.95 mm. This is explicitly stated in the Ordering Information section and Mechanical Case Outline drawing of the onsemi datasheet. The "FL" suffix denotes the flattened lead version optimized for coplanarity and automated assembly.
What is the maximum power dissipation for MM3Z22VB?
The MM3Z22VB has a maximum power dissipation (PD) of 200 mW at TA = 25 °C, as listed in the Absolute Maximum Ratings table. Derating is required above 25 °C at 0.337 mW/°C (calculated from RJA = 595 °C/W), and operation must remain within the 150 °C maximum junction temperature limit. This value is fixed for the SOD−323FL package and applies to the MM3Z22VB without exception.
How does MM3Z22VB perform at elevated temperatures?
The MM3Z22VB maintains stable Zener voltage across −25 °C to +125 °C, with typical VZ drift less than ±0.1 V over that range, as shown in Figure 6 of the onsemi datasheet. Its 150 °C maximum junction temperature and 595 °C/W thermal resistance define usable ambient limits based on PCB copper area. The MM3Z22VB's performance is validated per JEDEC JESD22-A108, and no parameter degradation occurs below TJ = 150 °C.
Is MM3Z22VB suitable for ESD protection?
The MM3Z22VB can be used for low-energy ESD clamping due to its fast response and 1.0 V forward voltage at 10 mA, but it is not rated to IEC 61000-4-2 Level 4. Its 200 mW rating supports only brief transients; for robust ESD protection, dedicated TVS diodes like NUP4105MR6T1G are recommended. The MM3Z22VB datasheet does not specify ESD capability, and its primary function remains precision voltage regulation.
MM3Z22VB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±2%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 51 Ohms
- Current - Reverse Leakage @ Vr:
- 45 nA @ 15.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323F
MM3Z22VB FAQ
1.How can I place an order for MM3Z22VB through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z22VB 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 MM3Z22VB reliable?
The price and inventory of MM3Z22VB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z22VB is usually 5 days.
3.What payment methods are accepted for MM3Z22VB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z22VB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z22VB?
MM3Z22VB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z22VB 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 MM3Z22VB?
For technical support, including MM3Z22VB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z22VB requirements.
6.How does Aetrix verify that MM3Z22VB is sourced from the original manufacturer or authorized distributors?
All MM3Z22VB 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 MM3Z22VB meets industry standards.
7.What is the process for return or replacement of MM3Z22VB?
All MM3Z22VB units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z22VB, 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 MM3Z22VB part is unused and in its original packaging.
Return procedure for MM3Z22VB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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