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Diodes Incorporated MMBZ5227B-7
- Part No.:
- MMBZ5227B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5227B-7.pdf
- Description:
- DIODE ZENER 3.6V 350MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,780
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Product details
Overview
MMBZ5227B-7 from Diodes Incorporated is a 3.6 V, 350 mW surface-mount Zener diode in SOT23 package, rated for 20 mA test current with 24 Ω dynamic impedance at 1 kHz and 15 µA reverse leakage at 1.0 V, used for precision voltage regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the MMBZ5227B-7 datasheet, MMBZ5227B-7 pinout, MMBZ5227B-7 application, or MMBZ5227B-7 equivalent, this page delivers verified Zener voltage tolerance (±5%), thermal resistance (357 °C/W), JEDEC-compliant reliability, and SOT23 terminal mapping for PCB layout and BOM validation.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled nominal voltage of 3.6 V (min 3.42 V, max 3.78 V) at IZT = 20 mA, exhibiting low dynamic impedance (24 Ω) and minimal temperature coefficient within its operating range.
Designed for stable reference generation in space-constrained designs, it maintains ≤15 µA reverse leakage at VR = 1.0 V and supports full -65°C to +150°C junction temperature operation while dissipating up to 350 mW on FR-4 PCB with recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.6 V nominal, ±5% tolerance (3.42–3.78 V @ 20 mA); enables accurate 3.3 V rail clamping or reference biasing. |
| Power Dissipation (PD) | 350 mW on FR-4 PCB; defines maximum continuous power handling without derating at 25°C ambient. |
| Zener Impedance (ZZT) | 24 Ω @ 1 kHz, 20 mA; ensures minimal output voltage variation under load transients. |
| Reverse Leakage (IR) | 15 µA @ VR = 1.0 V; guarantees low standby current in voltage-sense or protection circuits. |
| Thermal Resistance (RθJA) | 357 °C/W; determines junction-to-ambient temperature rise per watt dissipated on standard FR-4 layout. |
| Operating Temperature | -65°C to +150°C; supports industrial and automotive under-hood environments without derating. |
Pinout & Package
Package: SOT23 - 3-pin surface-mount plastic package with matte tin-plated Alloy 42 leadframe, UL 94V-0 rated molding compound, and moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground path | Connected to system ground or lower-potential node when used as shunt regulator. |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to input supply or protected node; maintains stable 3.6 V relative to anode during reverse bias. |
| No Connect (Pin 3) | Non-functional thermal pad / mechanical support | Internally unconnected; serves as heatsink anchor but must not be electrically tied to circuit nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables tight Zener voltage distribution and long-term stability under thermal cycling. |
| 350 mW FR-4 power rating | Validated for reliable operation without heatsinking on standard PCBs using Diodes' recommended pad layout. |
| Lead-free & RoHS 3 compliant | Fully compliant with EU Directive 2015/863/EU; contains <900 ppm Br/Cl and <1000 ppm Sb. |
| JEDEC High Reliability qualification | Qualified to AEC-Q200 stress test standards for passive components; suitable for automotive-grade applications. |
Applications
| Microcontroller Reset Circuit | Low-Voltage Reference Source |
|---|---|
Use Scenario: Provides clean, stable reset signal to microcontrollers during power-up and brown-out conditions. IC Role / Device Role / Timing Role: Shunt voltage clamp regulating reset threshold at 3.6 V with fast response to supply dips. Use Value: Ensures deterministic MCU initialization by holding reset active until VCC exceeds 3.6 V ±5%, preventing erratic boot behavior. |
Use Scenario: Supplies precise bias voltage to op-amp comparators or ADC reference inputs in sensor interfaces. IC Role / Device Role / Timing Role: Low-impedance Zener reference replacing higher-cost bandgap ICs in cost-sensitive analog front-ends. Use Value: Delivers 3.6 V reference with 24 Ω dynamic impedance and <15 µA leakage, minimizing error contribution in 12-bit measurement systems. |
| ESD Protection Clamp | USB Port Overvoltage Limiter |
Use Scenario: Placed across I/O lines to absorb transient ESD events before reaching sensitive logic inputs. IC Role / Device Role / Timing Role: Fast-acting shunt protector clamping line voltage to 3.6 V during ±8 kV HBM discharges. Use Value: Limits peak voltage to safe levels for 3.3 V GPIOs while maintaining <24 Ω clamping impedance for rapid energy dissipation. |
Use Scenario: Installed on USB VBUS line to prevent damage from accidental 5 V overvoltage or hot-swap surges. IC Role / Device Role / Timing Role: Standby-mode Zener limiter conducting only above 3.6 V, protecting downstream 3.3 V USB PHY circuitry. Use Value: Blocks >3.78 V excursions with 15 µA leakage at 1.0 V, preserving USB enumeration integrity and reducing need for active OVP ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V6 | Same 3.6 V nominal, but 300 mW rating and 40 Ω ZZT; SOT23 package with different marking and thermal resistance (400 °C/W). | Lower power margin and higher impedance reduce regulation accuracy in high-current or thermally constrained layouts. | Select when legacy BOM compatibility or distributor stock availability outweighs 50 mW/16 Ω performance gap. |
| MM3Z3V6 | 3.6 V Zener in SOD-323 (0805) package; 200 mW rating, 30 Ω ZZT, and 20 µA IR @ 1 V. | Smaller footprint but lower power and higher leakage limit use to ultra-low-power sensor nodes or space-limited wearables. | Choose for area-constrained designs where 150 mW headroom and 5 µA lower leakage are acceptable trade-offs. |
Compared with BZX84-C3V6 and MM3Z3V6, MMBZ5227B-7 offers superior thermal performance (357 °C/W), tighter impedance control (24 Ω), and lower leakage (15 µA), making it optimal for industrial-grade voltage references requiring long-term stability and robust PCB-level power handling.
Availability
MMBZ5227B-7 is available at Aetrix Electronics and suitable for microcontroller reset circuits, low-voltage reference sources, ESD protection clamps, and USB port overvoltage limiters requiring stable component supply across production lifecycles.
Supply support for MMBZ5227B-7 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, industry-standard components for automotive, industrial, and consumer markets.
This device belongs to the MMBZ52xxB series of 350 mW Zener diodes designed specifically for precision voltage regulation and protection in compact, automated-assembly PCBs with stringent environmental compliance requirements.
FAQ
What is the maximum continuous Zener current for MMBZ5227B-7 at 25°C?
The absolute maximum DC Zener current is derived from PD/VZ = 350 mW / 3.6 V ≈ 97 mA, but the datasheet specifies 20 mA as the standardized test current (IZT) for parameter characterization; sustained operation above 50 mA requires thermal derating per Figure 1.
Does MMBZ5227B-7 meet AEC-Q200 requirements for automotive use?
Yes - it is qualified to JEDEC standards referenced in AEC-Q200 for passive components and manufactured in IATF 16949-certified facilities; the automotive-grade Q-suffix variant (e.g., MMBZ5227BQ-7-F) is available for PPAP-controlled programs.
How does the SOT23 pinout map to cathode/anode terminals?
Per Diodes' top-view schematic: Pin 1 is Anode, Pin 2 is Cathode, and Pin 3 is internally unconnected (mechanical support only); correct orientation is confirmed by the device marking "G2" adjacent to Pin 1 on the package body.
Can MMBZ5227B-7 replace a 3.3 V Zener in a 3.3 V rail clamp?
No - its nominal 3.6 V Zener voltage exceeds typical 3.3 V rail tolerance (±5% = 3.135–3.465 V); using it risks incomplete clamping during brown-out or false triggering; select MMBZ5226B (3.3 V) instead for direct replacement.
MMBZ5227B-7 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:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 350 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-23-3
MMBZ5227B-7 FAQ
1.How can I place an order for MMBZ5227B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5227B-7 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 MMBZ5227B-7 reliable?
The price and inventory of MMBZ5227B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5227B-7 is usually 5 days.
3.What payment methods are accepted for MMBZ5227B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5227B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5227B-7?
MMBZ5227B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5227B-7 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 MMBZ5227B-7?
For technical support, including MMBZ5227B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5227B-7 requirements.
6.How does Aetrix verify that MMBZ5227B-7 is sourced from the original manufacturer or authorized distributors?
All MMBZ5227B-7 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 MMBZ5227B-7 meets industry standards.
7.What is the process for return or replacement of MMBZ5227B-7?
All MMBZ5227B-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5227B-7, 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 MMBZ5227B-7 part is unused and in its original packaging.
Return procedure for MMBZ5227B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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