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Diodes Incorporated MMBZ5225BT-7-F
- Part No.:
- MMBZ5225BT-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOT-523
- Datasheet:
-
MMBZ5225BT-7-F.pdf
- Description:
- DIODE ZENER 3V 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:2,338
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Product details
Overview
MMBZ5225BT-7-F from Diodes Incorporated is a 3.0 V, 150 mW surface-mount Zener diode in SOT-523 package, rated for 20 mA test current with 30 Ω dynamic impedance at 1 kHz and 50 μA reverse leakage at 1.0 V, used for voltage regulation and reference in space-constrained power management circuits.
For engineers reviewing the MMBZ5225BT-7-F datasheet, MMBZ5225BT-7-F pinout, MMBZ5225BT-7-F application, or MMBZ5225BT-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (833 °C/W), low-profile SOT-523 footprint, RoHS-compliant matte tin plating, and suitability for automated reflow assembly.
Technical Context
This device operates as a precision shunt voltage regulator, leveraging planar die construction to ensure stable Zener breakdown at 3.0 V (2.85–3.15 V range) under 20 mA test current. Its 150 mW power rating and 833 °C/W junction-to-ambient thermal resistance define its derating behavior above 25°C ambient.
The diode exhibits 30 Ω Zener impedance at IZT and 1600 Ω at IZK = 0.25 mA, supporting both regulated supply and low-current reference functions. Reverse leakage remains ≤50 μA at 1.0 V, enabling reliable operation in low-power standby paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.0 V ±5% - defines regulated output level in shunt regulator configurations |
| Power Dissipation | 150 mW - sets maximum continuous DC power handling on FR-4 PCB with recommended pad layout |
| Zener Test Current | 20 mA - standard bias point for specifying VZ, ZZT, and dynamic regulation performance |
| Zener Impedance | 30 Ω @ 1 kHz - determines AC regulation stability and ripple rejection capability |
| Reverse Leakage | ≤50 μA @ 1.0 V - ensures minimal quiescent current draw in voltage-sense or clamping applications |
| Thermal Resistance | 833 °C/W - quantifies temperature rise per watt dissipated; requires derating above 25°C ambient |
| Package | SOT-523 - 1.6 mm × 0.8 mm × 0.5 mm ultra-small outline for high-density PCB layouts |
Pinout & Package
SOT-523 package: 3-terminal surface-mount device with anode, cathode, and case (cathode marked by polarity indicator). Molded plastic case meets UL 94V-0 flammability rating; moisture sensitivity level 1 per J-STD-020D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential node in Zener regulation; forms return path during clamping |
| Cathode | Current exit terminal in forward bias; Zener breakdown terminal | Connected to regulated voltage node; reverse-biased to maintain stable VZ |
| Case / Exposed Pad | Non-electrical mechanical termination | No internal connection; serves only as thermal and mechanical anchor; not electrically isolated |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT-523 footprint | Enables placement in <1.0 mm² board area-critical for wearables and miniaturized IoT sensors |
| Planar die construction | Delivers tight VZ tolerance (±5%) and repeatable Zener impedance across production lots |
| Lead-free / RoHS-compliant plating | Matte tin finish over Alloy 42 leadframe supports Pb-free reflow profiles without solder joint reliability risk |
| Automated assembly compatibility | Standard tape-and-reel packaging (3000 pcs/reel) and terminal geometry meet pick-and-place nozzle and vision system requirements |
Applications
| Power Supply Voltage Reference | Overvoltage Clamp in USB Interface |
|---|---|
Use Scenario: Providing stable 3.0 V reference for ADC voltage dividers and LDO feedback networks in battery-powered microcontrollers. IC Role / Device Role / Timing Role: Shunt voltage reference maintaining accuracy within ±5% across temperature and load variations. Use Value: Eliminates need for external precision reference ICs, reducing BOM count and PCB area in sub-10 mm² sensor nodes. | Use Scenario: Protecting 3.3 V USB data lines from ESD transients and bus overvoltage events. IC Role / Device Role / Timing Role: Fast-acting bidirectional clamp limiting line voltage to ≤3.15 V during surge conditions. Use Value: Achieves <1 ns response time with ≤50 μA leakage, preserving signal integrity without loading the bus. |
| Low-Power Sensor Biasing | Microcontroller Reset Circuit |
Use Scenario: Biasing analog front-end components (e.g., op-amp inputs, thermistor bridges) in always-on environmental sensors. IC Role / Device Role / Timing Role: Low-quiescent-current voltage source delivering stable 3.0 V at <100 μA total system draw. Use Value: Enables multi-year battery life in wireless sensor nodes by minimizing static current consumption. | Use Scenario: Generating clean, noise-immune reset signal for ARM Cortex-M0+ MCUs during power-up and brownout conditions. IC Role / Device Role / Timing Role: Precision threshold detector triggering reset when supply drops below 2.85 V. Use Value: Prevents MCU lockup or flash corruption by ensuring deterministic reset assertion across voltage ramp rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C3V0LT1G | Same 3.0 V nominal, but SOD-523 package (slightly larger footprint); 300 mW rating; 90 Ω ZZT | Higher power handling supports transient clamping in industrial I/O modules | Select when >150 mW surge margin or legacy SOD-523 footprint compatibility is required |
| MMSZ5225ET1G | Same 3.0 V, SOD-123 package; 500 mW rating; 30 Ω ZZT; higher leakage (100 μA @ 1.0 V) | Larger size accommodates manual repair; suited for prototyping and low-volume industrial controls | Choose for hand-soldering feasibility or where thermal mass improves transient robustness |
Compared with BZX584C3V0LT1G and MMSZ5225ET1G, MMBZ5225BT-7-F offers the smallest PCB footprint and lowest leakage, making it optimal for ultra-compact, low-power designs where board area and standby current are critical constraints.
Availability
MMBZ5225BT-7-F is available at Aetrix Electronics and suitable for battery-powered sensors, USB peripheral protection, microcontroller reset circuits, and portable medical devices requiring stable component supply with consistent parametric performance.
Supply support for MMBZ5225BT-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-reliability, cost-optimized components for consumer, industrial, and computing markets.
This device belongs to the MMBZ52xxBT series of low-power Zener diodes designed specifically for space-constrained voltage regulation and ESD protection in portable and battery-operated electronics.
FAQ
What is the maximum continuous Zener current for MMBZ5225BT-7-F at 70°C ambient?
At 70°C ambient, the device's power dissipation must be derated from 150 mW using the 833 °C/W thermal resistance. Derated power = 150 mW × (1 − (70 − 25)/833) ≈ 92 mW. At 3.0 V, this supports ~30.7 mA continuous current, but the datasheet specifies 20 mA as the standard test current for guaranteed VZ and ZZT performance.
Does MMBZ5225BT-7-F have a specified capacitance value?
No capacitance value is specified in the DS30267 datasheet for MMBZ5225BT-7-F. Figure 4 shows typical total capacitance vs. nominal Zener voltage for the full series, estimating ~30 pF for 3.0 V devices at zero bias, but this is not a guaranteed parameter and should not be used for design-critical timing or filtering calculations.
Can MMBZ5225BT-7-F be used in bidirectional ESD protection?
No-it is a unidirectional Zener diode optimized for reverse-bias regulation. For bidirectional ESD protection, a dedicated TVS diode such as the D3V3M1U2LP-7 is required. Using this part in forward bias provides only 0.9 V clamping, insufficient for most ESD standards.
Is the SOT-523 package of MMBZ5225BT-7-F compatible with standard reflow profiles?
Yes-the device is qualified for Pb-free reflow per JEDEC J-STD-020D, with peak temperature up to 260°C. Its matte tin plating and SOT-523 thermal mass allow reliable soldering using industry-standard profile #3 (Ramp-to-spike), provided pad layout follows Diodes Inc.'s AP02001 guidelines.
MMBZ5225BT-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 150 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-523
MMBZ5225BT-7-F FAQ
1.How can I place an order for MMBZ5225BT-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5225BT-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 MMBZ5225BT-7-F reliable?
The price and inventory of MMBZ5225BT-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 MMBZ5225BT-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5225BT-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5225BT-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5225BT-7-F?
MMBZ5225BT-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5225BT-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 MMBZ5225BT-7-F?
For technical support, including MMBZ5225BT-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5225BT-7-F requirements.
6.How does Aetrix verify that MMBZ5225BT-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5225BT-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 MMBZ5225BT-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5225BT-7-F?
All MMBZ5225BT-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5225BT-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 MMBZ5225BT-7-F part is unused and in its original packaging.
Return procedure for MMBZ5225BT-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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