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Diodes Incorporated MMBZ5227BT-7-F
- Part No.:
- MMBZ5227BT-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOT-523
- Datasheet:
-
MMBZ5227BT-7-F.pdf
- Description:
- DIODE ZENER 3.6V 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:2,578
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Product details
Overview
MMBZ5227BT-7-F from Diodes Incorporated is a 3.6 V, 150 mW surface-mount Zener diode in SOT-523 package, rated for 20 mA test current, 24 Ω dynamic impedance at 20 mA, and 15 μA reverse leakage at 1.0 V reverse bias; used for precision voltage reference and overvoltage protection in low-power sensor interfaces and portable power rails.
For engineers reviewing the MMBZ5227BT-7-F datasheet, MMBZ5227BT-7-F pinout, MMBZ5227BT-7-F application, or MMBZ5227BT-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (833 °C/W), low capacitance (~15 pF), RoHS-compliant matte tin plating, and suitability for automated SMT assembly on space-constrained PCBs.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage regulation across varying load currents. Its planar die construction ensures consistent Zener characteristics and low leakage, with specified performance validated at 25 °C ambient and derated linearly above 25 °C per the 833 °C/W RθJA.
The device delivers 3.6 V nominal regulation with ±5% tolerance (3.42–3.78 V), 24 Ω impedance at 20 mA, and only 15 μA IR at VR = 1.0 V - enabling reliable clamping in low-current signal conditioning paths without loading source impedances.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.6 V nominal, 3.42–3.78 V min/max - defines precise clamping threshold for 3.3 V rail protection |
| Power Dissipation (PD) | 150 mW - limits continuous dissipation to avoid thermal runaway on FR-4 boards with standard pad layout |
| Zener Impedance (ZZT) | 24 Ω at IZT = 20 mA - ensures minimal voltage shift under moderate current transients |
| Reverse Leakage (IR) | 15 μA at VR = 1.0 V - guarantees negligible standby current in always-on monitoring circuits |
| Thermal Resistance (RθJA) | 833 °C/W - requires careful thermal pad design for >50 mW operation in enclosed environments |
| Package | SOT-523 - 1.6 mm × 0.8 mm footprint supports high-density routing in wearables and IoT nodes |
Pinout & Package
SOT-523 package: ultra-compact 3-terminal surface-mount case with anode/cathode polarity marked on top surface; terminals are solderable per MIL-STD-202 Method 208, lead-free matte tin finish over Alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node during regulation; enables reverse-bias operation when cathode is held higher |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to regulated voltage node; determines clamping level relative to anode reference |
| Case / Heat Sink (Pin 3) | Thermal path | Non-electrical; provides mechanical mounting and minor thermal conduction via exposed copper pad |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT-523 footprint | Enables placement in <1.0 mm² board area - critical for miniaturized battery management ICs |
| 150 mW power rating with 833 °C/W RθJA | Supports transient suppression up to 100 ms pulses without derating in open-air conditions |
| ±5% Zener voltage tolerance | Meets tight reference requirements for ADC biasing and comparator hysteresis networks |
| Lead-free and RoHS-compliant | Complies with IPC-J-STD-020D Level 1 moisture sensitivity - no bake required before reflow |
Applications
| USB-C Port Protection | Low-Power Sensor Biasing |
|---|---|
Use Scenario: Clamping ESD transients on USB-C CC lines during hot-plug events. IC Role / Device Role / Timing Role: Zener clamp protecting Type-C controller GPIO pins from ±8 kV contact discharge. Use Value: 15 μA leakage avoids loading the 500 kΩ CC pull-up resistor; 3.6 V threshold aligns with VCONN logic high margin. | Use Scenario: Providing stable reference voltage for MEMS accelerometer analog front-end. IC Role / Device Role / Timing Role: Precision shunt reference establishing 3.3 V rail monitor threshold. Use Value: 24 Ω ZZT ensures <10 mV droop at 200 μA sensor bias current - maintains ADC linearity within 0.1% FS. |
| IoT Node Battery Monitoring | Industrial PLC Input Conditioning |
Use Scenario: Scaling Li-ion cell voltage to MCU ADC input range using resistive divider + Zener clamp. IC Role / Device Role / Timing Role: Overvoltage limiter preventing ADC saturation during charger fault conditions. Use Value: 3.42–3.78 V regulation window matches 3.3 V ADC full-scale with 5% headroom - eliminates need for external op-amp buffer. | Use Scenario: Protecting 24 V digital input optocoupler LED from field-wiring surges. IC Role / Device Role / Timing Role: Low-energy crowbar limiting transient energy into series current-limiting resistor. Use Value: 150 mW rating sustains 100 ms 100 V spikes at <1.5 mA average current - extends optocoupler lifetime by 3× vs. unclamped design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C3V6LT1G | Same 3.6 V nominal, but SOD-523 package (slightly larger); 30 Ω ZZT, 20 μA IR | Higher thermal resistance (900 °C/W) reduces usable power in confined layouts | Prefer for legacy designs already using SOD-523 footprints or where slightly higher leakage is acceptable |
| MM3Z3V6T1G | Same SOT-523 package; 3.6 V nominal, but ±6% tolerance (3.38–3.82 V); 40 Ω ZZT | Looser voltage spec increases ADC offset error in precision biasing | Acceptable for non-critical rail monitoring where cost is prioritized over regulation accuracy |
Compared with BZX584C3V6LT1G and MM3Z3V6T1G, MMBZ5227BT-7-F offers tighter voltage tolerance and lower dynamic impedance in the smallest standardized SOT-523 outline - making it optimal for space-constrained, low-leakage, and precision-clamping use cases.
Availability
MMBZ5227BT-7-F is available at Aetrix Electronics and suitable for USB-C interface protection, MEMS sensor biasing, IoT battery monitoring, and industrial PLC input conditioning requiring stable component supply and full traceability.
Supply support for MMBZ5227BT-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, with design centers across Asia and manufacturing in China, Taiwan, and the US.
This part belongs to the MMBZ52xxBT Zener diode family, engineered for general-purpose voltage regulation and transient suppression in high-volume consumer and industrial surface-mount applications.
FAQ
What is the maximum reverse voltage (VR) this Zener can withstand before breakdown?
The MMBZ5227BT-7-F exhibits sharp Zener breakdown at its nominal 3.6 V rating, with specified reverse leakage measured at 1.0 V. It is not rated for sustained reverse operation below breakdown - the 1.0 V value is a test condition for leakage, not a maximum blocking voltage. For blocking applications, select a diode with explicit VRWM rating.
Can this device be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficient and parameter spread; paralleling MMBZ5227BT-7-F units causes current hogging and thermal runaway. For >150 mW dissipation, use a single higher-power Zener (e.g., 1N4728A) or active regulation instead.
Is the SOT-523 package compatible with standard reflow profiles?
Yes - the SOT-523 package meets IPC-J-STD-020D Level 1 moisture sensitivity, requiring no pre-bake. It is qualified for standard lead-free reflow profiles (peak 260 °C, 60-second duration), with matte tin plating ensuring reliable wetting and joint integrity.
How does the 833 °C/W thermal resistance affect real-world layout?
At 100 mW dissipation, the junction-to-ambient rise is ~83 °C - meaning a 25 °C ambient yields ~108 °C junction temperature. To stay within the -65 to +150 °C rating, limit continuous power to ≤60 mW on standard FR-4 without thermal vias, or add two 0.3 mm thermal vias under the pad to reduce RθJA by ~30%.
MMBZ5227BT-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):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 150 mW
- Impedance (Max) (Zzt):
- 24 Ohms
- Current - Reverse Leakage @ Vr:
- 15 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
MMBZ5227BT-7-F FAQ
1.How can I place an order for MMBZ5227BT-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5227BT-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 MMBZ5227BT-7-F reliable?
The price and inventory of MMBZ5227BT-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 MMBZ5227BT-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5227BT-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5227BT-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5227BT-7-F?
MMBZ5227BT-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5227BT-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 MMBZ5227BT-7-F?
For technical support, including MMBZ5227BT-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5227BT-7-F requirements.
6.How does Aetrix verify that MMBZ5227BT-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5227BT-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 MMBZ5227BT-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5227BT-7-F?
All MMBZ5227BT-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5227BT-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 MMBZ5227BT-7-F part is unused and in its original packaging.
Return procedure for MMBZ5227BT-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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