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Diodes Incorporated MMBZ5225B-7-F
- Part No.:
- MMBZ5225B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5225B-7-F.pdf
- Description:
- DIODE ZENER 3V 350MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:41,014
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Product details
Overview
MMBZ5225B-7-F from Diodes Incorporated is a 3.0 V, ±5% tolerance, 350 mW surface-mount Zener diode in SOT23 package, optimized for voltage regulation and reference in low-power analog circuits, with 50 µA reverse leakage at 1.0 V and 1.6 kΩ dynamic impedance at 20 mA test current.
For engineers reviewing the MMBZ5225B-7-F datasheet, MMBZ5225B-7-F pinout, MMBZ5225B-7-F application, or MMBZ5225B-7-F equivalent, key selection criteria include Zener voltage accuracy, thermal derating on FR-4, SOT23 footprint compatibility, and JEDEC-compliant reliability for industrial and consumer power management designs.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across load variations, with nominal 3.0 V regulation at 20 mA test current and specified performance over −65°C to +150°C ambient range. Its planar die construction ensures consistent breakdown characteristics and low parametric drift.
Thermal resistance of 357°C/W (junction-to-ambient, FR-4 board) defines its power handling limit under real-world PCB conditions, and the device complies with JEDEC high-reliability standards while meeting RoHS 3, halogen-free, and antimony-free "Green" requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.0 V nominal, 2.85–3.15 V range at 20 mA - ensures tight regulation for 3.3 V rail clamping or reference generation. |
| Power Dissipation (PD) | 350 mW on FR-4 PCB - sets maximum continuous DC or pulsed power budget in compact layouts. |
| Zener Impedance (ZZT) | 1.6 kΩ at 20 mA - indicates moderate AC regulation capability; suitable for non-critical references, not precision DAC buffers. |
| Reverse Leakage (IR) | 50 µA at VR = 1.0 V - confirms low standby current in undervoltage detection or bias networks. |
| Operating Temperature | −65°C to +150°C - supports deployment in extended-temperature industrial and automotive-adjacent environments. |
| Package | SOT23 - enables automated placement, occupies <1.3 mm² PCB area, compatible with IPC-7351B standard footprints. |
Pinout & Package
SOT23 package: 3-terminal surface-mount plastic case with matte tin-plated alloy 42 leadframe; moisture sensitivity level 1 per J-STD-020; weight ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground | Connected to system ground or lower-potential node when used in shunt regulation configuration. |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to input supply via series resistor; provides stable 3.0 V reference to downstream circuitry. |
| No-Connect (Pin 3) | Unused internal die connection | Electrically isolated; must remain unconnected per datasheet - no tie-to-ground or pull-up required. |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables repeatable Zener voltage distribution and improved long-term stability vs. diffused junctions. |
| 350 mW dissipation on FR-4 | Validated thermal performance using industry-standard PCB layout - no heatsink or special copper required. |
| Lead-free & RoHS 3 compliant | Fully compliant with EU Directive 2015/863/EU - eliminates hazardous substances without compromising solderability. |
| Halogen- and antimony-free "Green" | Contains <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - meets strict environmental compliance for global OEM programs. |
Applications
| Power Supply Clamp | Reference Voltage Source |
|---|---|
|
Use Scenario: Clamping transient overvoltage on 3.3 V I/O lines in microcontroller peripherals. IC Role / Device Role: Shunt regulator absorbing surge energy above 3.0 V threshold. Use Value: Prevents latch-up or damage to 3.3 V logic inputs during ESD or inductive kick events. |
Use Scenario: Providing stable bias voltage for op-amp comparators in battery-monitoring circuits. IC Role / Device Role: Low-current Zener reference replacing higher-cost precision voltage references. Use Value: Delivers ±5% accuracy at 100 µA load - sufficient for threshold detection with 5% hysteresis margin. |
| Overvoltage Protection | Signal Level Translation |
|
Use Scenario: Protecting ADC input pins from accidental 5 V misconnection in mixed-voltage sensor interfaces. IC Role / Device Role: Crowbar element limiting input to ≤3.15 V before ADC saturation. Use Value: Ensures ADC full-scale range remains usable without external series resistance degradation. |
Use Scenario: Translating 5 V logic signals down to 3.0 V compatible levels for legacy interface ICs. IC Role / Device Role: Passive level shifter using forward-biased anode and Zener-clamped cathode. Use Value: Enables interoperability without active translators - supports ≤1 MHz digital edge rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V0 | Same 3.0 V nominal, but 300 mW rating and higher ZZT (2.5 kΩ); SOT23 package with different marking and tighter AEC-Q200 qualification path. | Preferred for automotive-grade designs requiring PPAP documentation; less suitable for high-temperature FR-4 derating scenarios. | Select when AEC-Q200 compliance and traceable change control are mandatory; verify thermal margin at 125°C ambient. |
| MM3Z3V0T1G | 3.0 V, 200 mW, 1.5 kΩ ZZT, same SOT23 footprint; lower power rating but tighter ±2% VZ tolerance option available. | Better for precision reference use cases where voltage accuracy outweighs power handling; limited to ≤150 mW continuous operation. | Choose when ±2% VZ tolerance is required and load current stays below 10 mA - avoid in >85°C ambient without derating. |
Compared with BZX84-C3V0 and MM3Z3V0T1G, MMBZ5225B-7-F offers superior thermal robustness (350 mW @ 25°C, 357°C/W RθJA) and broader industrial temperature support, making it optimal for cost-sensitive, thermally constrained consumer and industrial power rails where ±5% regulation suffices.
Availability
MMBZ5225B-7-F is available at Aetrix Electronics and suitable for voltage clamping, reference generation, and overvoltage protection applications requiring stable component supply, consistent SOT23 packaging, and JEDEC-compliant reliability.
Supply support for MMBZ5225B-7-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management, signal integrity, and protection solutions.
This part belongs to the MMBZ52xxB Zener diode family, designed specifically for compact, high-volume voltage regulation in space-constrained consumer, computing, and industrial electronics.
FAQ
What is the maximum continuous Zener current for MMBZ5225B-7-F at 70°C ambient?
At 70°C ambient, the power derating curve (Figure 1) reduces allowable dissipation to ~250 mW. With VZ = 3.0 V, max continuous current is approximately 83 mA - but practical design limits to 20 mA test current ensure stable regulation and longevity.
Can MMBZ5225B-7-F be used in place of a 3.3 V Zener diode?
No - its nominal Zener voltage is 3.0 V (2.85–3.15 V range), not 3.3 V. Substituting it for a 3.3 V part would result in undershoot of the target regulation point by up to 300 mV, potentially causing functional failure in 3.3 V rail monitoring or clamping circuits.
Is the SOT23 pinout compatible with standard pick-and-place equipment?
Yes - the SOT23 package uses standardized 1.3 mm pitch, 2.9 mm × 1.3 mm body dimensions, and matte tin-plated terminals fully compliant with IPC-J-STD-002 and MIL-STD-202 solderability requirements for automated assembly.
Does MMBZ5225B-7-F require a series current-limiting resistor in all applications?
Yes - as a shunt regulator, it must be paired with a series resistor to limit current during regulation. The resistor value is calculated using (VIN − VZ) / IZ, where IZ is chosen between 1 mA (for low leakage) and 20 mA (for best ZZT performance).
MMBZ5225B-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MMBZ5225B-7-F FAQ
1.How can I place an order for MMBZ5225B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5225B-7-F 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 MMBZ5225B-7-F reliable?
The price and inventory of MMBZ5225B-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5225B-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5225B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5225B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5225B-7-F?
MMBZ5225B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5225B-7-F 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 MMBZ5225B-7-F?
For technical support, including MMBZ5225B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5225B-7-F requirements.
6.How does Aetrix verify that MMBZ5225B-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5225B-7-F 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 MMBZ5225B-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5225B-7-F?
All MMBZ5225B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5225B-7-F, 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 MMBZ5225B-7-F part is unused and in its original packaging.
Return procedure for MMBZ5225B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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