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Diodes Incorporated MMBZ5226BT-7-F
- Part No.:
- MMBZ5226BT-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOT-523
- Datasheet:
-
MMBZ5226BT-7-F.pdf
- Description:
- DIODE ZENER 3.3V 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:4,007
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Product details
Overview
MMBZ5226BT-7-F from Diodes Incorporated is a 3.3 V, 150 mW surface-mount Zener diode in SOT-523 package, with nominal zener voltage 3.3 V (min 3.14 V, max 3.47 V), test current 20 mA, and zener impedance 28 Ω at IZT; used for precision voltage regulation and reference in low-power analog circuits, ESD protection clamping, and power rail stabilization.
For engineers reviewing the MMBZ5226BT-7-F datasheet, MMBZ5226BT-7-F pinout, MMBZ5226BT-7-F application, or MMBZ5226BT-7-F equivalent, key selection criteria include zener voltage tolerance, dynamic impedance at operating current, thermal resistance (833 °C/W), reverse leakage (25 µA at 1.0 V), and SOT-523 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a silicon planar Zener diode optimized for stable reverse-bias breakdown at 3.3 V with tight ±3% tolerance. Its construction enables low capacitance (~20 pF typical) and fast response to transient overvoltage events.
Designed for automated SMT assembly, it features matte tin-plated Alloy 42 leads, RoHS-compliant green molding compound (date code UO+), and J-STD-020D Level 1 moisture sensitivity-requiring no bake prior to reflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 3.3 V - precise DC reference point for biasing or regulation in 3.3 V systems |
| Zener Voltage Range | 3.14 V to 3.47 V - ±3% tolerance ensures predictable clamping across production lots |
| Test Current (IZT) | 20 mA - standard operating point where VZ and ZZT are specified |
| Zener Impedance (ZZT) | 28 Ω - low dynamic resistance maintains stable voltage under small-signal load variation |
| Power Dissipation | 150 mW - limits continuous dissipation on FR-4 board with recommended pad layout |
| Reverse Leakage (IR) | 25 µA @ 1.0 V - minimal standby current in voltage-sense or reference paths |
| Thermal Resistance (RθJA) | 833 °C/W - defines junction-to-ambient temperature rise per milliwatt under standard mounting |
Pinout & Package
Package: SOT-523 - ultra-small plastic surface-mount case (1.6 mm × 0.8 mm × 0.5 mm), UL 94V-0 rated, lead-free, and halogen-free per Diodes Inc. Green policy.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / cathode-side reference node in reverse-bias configuration | Connected to lower-potential rail when used as shunt regulator or clamp |
| Cathode | Zener breakdown terminal / voltage reference output node | Provides stable 3.3 V reference relative to anode when reverse-biased above VZ |
| Case (non-electrical) | Mechanical mounting / thermal path | No internal connection; serves only structural and thermal dissipation role |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT-523 footprint | Enables placement in space-constrained designs such as wearables and IoT sensor nodes |
| Planar die construction | Ensures consistent breakdown characteristics and improved reliability vs. alloyed junctions |
| 150 mW power rating with 833 °C/W RθJA | Supports operation up to +125 °C ambient with ≤150 mW dissipation on standard FR-4 |
| RoHS-compliant & "Green" molding compound | Meets environmental compliance requirements without halogen-based flame retardants |
| Lead-free matte tin plating | Compatible with Pb-free reflow profiles and eliminates post-assembly cleaning concerns |
Applications
| USB Port ESD Protection | 3.3 V LDO Reference Stabilization |
|---|---|
Use Scenario: Clamping transient voltages on USB D+/D− lines during ESD events per IEC 61000-4-2. IC Role / Device Role: Bidirectional shunt clamp limiting line voltage to ≤3.3 V + VF during surge. Use Value: Low 28 Ω ZZT and 25 µA IR ensure minimal signal distortion and leakage in idle state. | Use Scenario: Stabilizing feedback node of a 3.3 V low-dropout regulator under light-load conditions. IC Role / Device Role: Precision voltage reference providing stable bias to error amplifier input. Use Value: Tight 3.14–3.47 V range and low tempco support <±1% output regulation over temperature. |
| Microcontroller Reset Circuit | Low-Power Sensor Biasing |
Use Scenario: Generating clean reset threshold for ARM Cortex-M0+ microcontrollers with 3.3 V supply. IC Role / Device Role: Zener-based voltage detector triggering reset IC or GPIO input. Use Value: Predictable 3.3 V turn-on with <100 ns response ensures reliable reset assertion during brown-out. | Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in battery-powered sensors. IC Role / Device Role: Low-current voltage reference source for ratiometric measurement circuits. Use Value: 20 mA IZT capability and 25 µA IR enable microamp-level biasing with minimal self-heating error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C3V3 | Same 3.3 V nominal, but SOD-523 package (slightly larger), 300 mW rating, 90 Ω ZZT | Higher power handling supports higher surge energy; less suitable for ultra-dense layouts | Select when surge robustness > footprint size, especially in industrial I/O protection |
| MM3Z3V3T1G | SOD-323 package, 200 mW, 3.3 V ±5%, 30 Ω ZZT, 5 µA IR @ 1 V | Lower leakage improves battery life in always-on sensing; larger footprint than SOT-523 | Select for ultra-low-power applications where 5 µA leakage outweighs 0.2 mm² area penalty |
Compared with BZX584C3V3 and MM3Z3V3T1G, MMBZ5226BT-7-F offers the smallest footprint and best balance of low leakage (25 µA), tight tolerance (±3%), and low impedance (28 Ω) for space- and precision-critical 3.3 V reference use cases.
Availability
MMBZ5226BT-7-F is available at Aetrix Electronics and suitable for USB interface protection, microcontroller reset generation, low-power sensor biasing, and 3.3 V LDO reference stabilization requiring stable component supply across prototyping, NPI, and volume production phases.
Supply support for MMBZ5226BT-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 high-reliability components.
This part belongs to the MMBZ52xxBT series of general-purpose Zener diodes designed specifically for compact, low-power voltage regulation and ESD protection in portable and space-constrained electronics.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The MMBZ5226BT-7-F has a nominal zener voltage of 3.3 V with a guaranteed range of 3.14 V to 3.47 V at 20 mA test current. Breakdown occurs within this band; applying ≥3.47 V in reverse bias will sustain regulated conduction. It is not rated for blocking above 3.47 V without significant current flow.
Can this Zener diode be used in forward-bias mode like a standard diode?
Yes - its forward voltage is specified at 0.9 V @ 10 mA, matching typical silicon diode behavior. However, it is optimized for reverse-bias regulation; forward conduction is secondary and lacks dedicated characterization beyond VF, making it unsuitable as a primary rectifier or switching element.
Is the SOT-523 package compatible with standard pick-and-place equipment?
Yes - the SOT-523 package is fully supported by industry-standard SMT assembly equipment. Its 0.5 mm pitch, defined land pattern (per Diodes Inc. AP02001), and J-STD-020D Level 1 moisture sensitivity allow direct placement without baking or special tooling, ideal for high-speed automated lines.
How does temperature affect the zener voltage stability?
The MMBZ5226BT-7-F exhibits a positive temperature coefficient near 3.3 V, resulting in ~0.05%/°C drift. Over −65 °C to +150 °C, total VZ shift remains within ±5% of nominal, verified per DS30267 Rev. 11. For precision references, derating and thermal layout (e.g., copper pour isolation) are recommended.
MMBZ5226BT-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):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 150 mW
- Impedance (Max) (Zzt):
- 28 Ohms
- Current - Reverse Leakage @ Vr:
- 25 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
MMBZ5226BT-7-F FAQ
1.How can I place an order for MMBZ5226BT-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5226BT-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 MMBZ5226BT-7-F reliable?
The price and inventory of MMBZ5226BT-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 MMBZ5226BT-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5226BT-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5226BT-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5226BT-7-F?
MMBZ5226BT-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5226BT-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 MMBZ5226BT-7-F?
For technical support, including MMBZ5226BT-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5226BT-7-F requirements.
6.How does Aetrix verify that MMBZ5226BT-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5226BT-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 MMBZ5226BT-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5226BT-7-F?
All MMBZ5226BT-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5226BT-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 MMBZ5226BT-7-F part is unused and in its original packaging.
Return procedure for MMBZ5226BT-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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