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Diodes Incorporated MMBZ5250BT-7-F
- Part No.:
- MMBZ5250BT-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOT-523
- Datasheet:
-
MMBZ5250BT-7-F.pdf
- Description:
- DIODE ZENER 20V 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:3,344
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Product details
Overview
MMBZ5250BT-7-F from Diodes Incorporated is a 20 V, 150 mW surface-mount Zener diode in SOT-523 package, rated for 6.2 mA test current, 25 Ω zener impedance at 1 kHz, and 0.1 μA reverse leakage at 15 V, used for precision voltage regulation and reference in space-constrained power management circuits.
For engineers reviewing the MMBZ5250BT-7-F datasheet, MMBZ5250BT-7-F pinout, MMBZ5250BT-7-F application, or MMBZ5250BT-7-F equivalent, key selection criteria include nominal zener voltage tolerance (±5%), thermal resistance (833 °C/W), low capacitance (<10 pF), RoHS-compliant matte tin plating, and suitability for automated SMT assembly on FR-4 PCBs.
Technical Context
This device operates as a silicon planar Zener diode with sharp reverse breakdown at 20 V nominal, designed for stable voltage clamping and reference generation in low-power analog and digital supply rails. Its construction enables consistent performance across -65 °C to +150 °C ambient temperature range.
The 150 mW power rating and 833 °C/W junction-to-ambient thermal resistance define its derating behavior above 25 °C, while the 25 Ω dynamic impedance at 6.2 mA supports stable regulation under moderate load transients. Reverse leakage remains ≤0.1 μA up to 15 V, ensuring minimal quiescent current draw in standby modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 20 V ±5% - defines precise clamping threshold for overvoltage protection or reference voltage generation |
| Power Dissipation | 150 mW - maximum continuous power handling on standard FR-4 board with recommended pad layout |
| Zener Test Current | 6.2 mA - operating point where specified zener voltage and impedance are guaranteed |
| Zener Impedance | 25 Ω @ 1 kHz - low dynamic resistance ensures minimal output voltage variation under load changes |
| Reverse Leakage | 0.1 μA @ 15 V - ultra-low off-state current preserves battery life in portable applications |
| Thermal Resistance | 833 °C/W - quantifies temperature rise per watt; requires thermal-aware PCB layout above 25 °C ambient |
| Package | SOT-523 - 1.6 mm × 0.8 mm × 0.5 mm ultra-small footprint for high-density layouts |
Pinout & Package
Package: SOT-523 - ultra-compact plastic molded case (UL 94V-0), 0.002 g weight, moisture sensitivity level 1, lead-free matte tin plating over Alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node during normal operation; polarity must match schematic symbol orientation |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher-potential node; reverse-biased to achieve 20 V regulation or clamping |
| Case / Exposed Pad | Non-electrical mechanical anchor | No internal connection; serves only for mechanical stability and thermal conduction to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SMT footprint | 1.6 mm × 0.8 mm body enables placement in tight spaces such as wearables and IoT sensor nodes |
| Planar die construction | Ensures repeatable breakdown characteristics and long-term stability under thermal cycling |
| RoHS-compliant & "Green" | Halogen-free molding compound (Date Code UO and newer) meets environmental compliance requirements |
| Automated assembly compatible | Standard SOT-523 geometry and solderable terminals support high-yield reflow and pick-and-place |
Applications
| Portable Power Monitoring | USB-C PD Voltage Clamp |
|---|---|
Use Scenario: Monitoring battery voltage in Bluetooth earbuds using a microcontroller ADC with internal 3.3 V reference. IC Role / Device Role / Timing Role: Zener diode provides stable 20 V reference for external voltage divider scaling down battery voltage to safe ADC input range. Use Value: Tight 20 V ±5% tolerance and sub-0.1 μA leakage minimize measurement error and extend battery runtime. | Use Scenario: Protecting USB-C port controller IC from transient overvoltage during hot-plug events. IC Role / Device Role / Timing Role: Clamps induced surges above 20 V to safeguard 3.3 V logic pins of the port controller. Use Value: 25 Ω low zener impedance ensures fast response and minimal overshoot during 8/20 μs surge pulses. |
| Industrial Sensor Signal Conditioning | Low-Power MCU Reset Circuit |
Use Scenario: Stabilizing excitation voltage for a 4–20 mA loop-powered pressure sensor in factory automation. IC Role / Device Role / Timing Role: Regulates unregulated 24 V loop supply down to precise 20 V reference for op-amp biasing. Use Value: 833 °C/W thermal resistance allows reliable operation in enclosed enclosures up to +70 °C ambient. | Use Scenario: Generating a clean reset threshold for an ARM Cortex-M0+ microcontroller in smart metering modules. IC Role / Device Role / Timing Role: Supplies regulated 20 V to external reset supervisor IC that monitors 3.3 V rail. Use Value: Low 0.1 μA leakage prevents unintended discharge of reset capacitor during deep-sleep modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C20LT1G | Same 20 V nominal, but SOD-523 package (slightly larger); 30 Ω zener impedance; 0.1 μA leakage | Higher thermal resistance (900 °C/W); less suitable for ultra-dense layouts | Select when legacy SOD-523 footprint compatibility is required over absolute size minimization |
| MMSZ5250ET1G | Same 20 V nominal, SOD-123 package; 150 mW rating; 25 Ω impedance; 0.1 μA leakage | 3.7 mm × 1.6 mm footprint - 3× larger area; better heat dissipation but incompatible with SOT-523 land pattern | Choose when higher power margin or manual rework accessibility is prioritized over board space |
Compared with BZX584C20LT1G and MMSZ5250ET1G, MMBZ5250BT-7-F delivers the smallest PCB footprint and best fit for miniaturized designs, while maintaining identical electrical regulation performance and leakage behavior - critical where volume and weight are constrained.
Availability
MMBZ5250BT-7-F is available at Aetrix Electronics and suitable for portable power monitoring, USB-C PD voltage clamp, and industrial sensor signal conditioning requiring stable component supply and full traceability.
Supply support for MMBZ5250BT-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, headquartered in Plano, Texas, serving automotive, industrial, computing, and consumer markets with a focus on reliability and efficiency.
This part belongs to the MMBZ52xxBT series of ultra-small-signal Zener diodes, engineered specifically for space-constrained voltage reference and clamping in portable and battery-powered systems.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The MMBZ5250BT-7-F has a nominal zener voltage of 20 V with a tolerance of ±5%, meaning breakdown occurs between 19.0 V and 21.0 V at 6.2 mA test current. It is not rated for sustained reverse operation above 21.0 V; exceeding this risks irreversible degradation or thermal runaway.
Can this Zener diode be used in parallel for higher power handling?
No - due to manufacturing variations in zener voltage, paralleling multiple MMBZ5250BT-7-F units causes current hogging, where one device conducts most of the current and overheats. For higher power, use a single higher-rated Zener or a dedicated voltage regulator IC instead.
Is the SOT-523 package compatible with standard reflow profiles?
Yes - the SOT-523 package and matte tin plating are fully compatible with IPC/JEDEC J-STD-020D Level 1 moisture sensitivity and standard lead-free reflow profiles (peak 260 °C). No pre-bake is required, and solder joint integrity is verified per MIL-STD-202 Method 208.
Does this part meet automotive AEC-Q200 requirements?
No - the MMBZ5250BT-7-F is not AEC-Q200 qualified. It is rated for industrial temperature range (-65 °C to +150 °C), but lacks the stress testing, failure analysis, and qualification documentation required for automotive applications. For AEC-Q200 Zeners, consider Diodes Inc.'s AZ series.
MMBZ5250BT-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):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 150 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 15 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
MMBZ5250BT-7-F FAQ
1.How can I place an order for MMBZ5250BT-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5250BT-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 MMBZ5250BT-7-F reliable?
The price and inventory of MMBZ5250BT-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 MMBZ5250BT-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5250BT-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5250BT-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5250BT-7-F?
MMBZ5250BT-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5250BT-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 MMBZ5250BT-7-F?
For technical support, including MMBZ5250BT-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5250BT-7-F requirements.
6.How does Aetrix verify that MMBZ5250BT-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5250BT-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 MMBZ5250BT-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5250BT-7-F?
All MMBZ5250BT-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5250BT-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 MMBZ5250BT-7-F part is unused and in its original packaging.
Return procedure for MMBZ5250BT-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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