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onsemi MMBZ5227BLT1
- Part No.:
- MMBZ5227BLT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5227BLT1.pdf
- Description:
- DIODE ZENER 3.6V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,616
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Product details
Overview
MMBZ5227BLT1 from onsemi is a 3.6 V, 225 mW surface-mount Zener diode in SOT-23 package, designed for precision voltage regulation and overvoltage protection in space-constrained circuits. It delivers nominal Zener voltage of 3.6 V at 20 mA test current, with dynamic impedance of 24 Ω and leakage current ≤0.25 μA at 1 V reverse bias, commonly used in power supply feedback loops and portable device voltage clamping.
For engineers reviewing the MMBZ5227BLT1 datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (556 °C/W on FR-5), ESD rating (>16 kV HBM), and compatibility with automated SMT assembly on high-density PCBs.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its 3.6 V nominal Zener voltage exhibits low temperature coefficient near zero crossing, and it supports DC zener current up to 20 mA with guaranteed regulation performance across −65°C to +150°C junction temperature range.
The device features a cathode-indicated polarity band, no internal connection on pin 2, and is optimized for low-profile mounting on FR-5 or alumina substrates. Its 225 mW power rating derates linearly above 25°C at 1.8 mW/°C, enabling predictable thermal design in compact consumer electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.6 V nominal at IZT = 20 mA - provides stable reference for low-voltage regulator feedback or clamp circuits |
| Zener Impedance (ZZT) | 24 Ω max at IZT = 20 mA - ensures minimal output voltage variation under dynamic load changes |
| Power Dissipation (PD) | 225 mW on FR-5 board at 25°C - defines maximum continuous power handling before thermal derating applies |
| Reverse Leakage (IR) | ≤0.25 μA at VR = 1 V - guarantees negligible standby current in battery-powered voltage monitor applications |
| ESD Rating | Class 3 (>16 kV HBM) - enables robust handling during automated assembly without external protection |
| Junction Temp Range | −65°C to +150°C - supports operation in automotive cabin, industrial control, and outdoor portable environments |
| Forward Voltage (VF) | ≤0.95 V at IF = 10 mA - allows use as low-drop rectifier or logic-level clamp in dual-function designs |
Pinout & Package
SOT-23 (TO-236) plastic surface-mount package, 2.90 mm × 1.30 mm × 1.00 mm body size, void-free thermosetting case with corrosion-resistant finish, UL 94 V-0 flammability rating, and cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; required for forward conduction path |
| 2 | No Connection | Internally unconnected terminal - must remain floating; no PCB trace or pad required |
| 3 | Cathode | Connected to higher-potential node in reverse-bias regulation; polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free, Halogen-Free/BFR-Free | RoHS-compliant construction enables global market access and eliminates hazardous substance compliance risk |
| 225 mW Power Rating | Enables compact voltage regulation without heatsinking in handheld and wearables where board area is constrained |
| ESD Robustness >16 kV HBM | Eliminates need for external ESD protection in front-end signal conditioning and interface circuits |
| Optimized SMT Package | SOT-23 footprint supports high-speed pick-and-place assembly and reflow soldering per J-STD-020 standards |
| Zener Voltage Tolerance | ±5% (3.42–3.78 V) ensures consistent regulation across production batches without post-assembly trimming |
Applications
| USB Port Overvoltage Protection | Low-Voltage Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamping transient surges on USB VBUS line in portable accessories to prevent damage to downstream ICs. IC Role / Device Role / Timing Role: Zener voltage clamp placed between VBUS and ground, conducting only during overvoltage events ≥3.6 V. Use Value: Limits peak voltage to safe level using inherent Zener breakdown, eliminating need for TVS diodes in cost-sensitive designs. |
Use Scenario: Generating precise reset threshold for 3.3 V microcontrollers in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Reference element in RC-based reset generator, where Zener voltage sets trip point for comparator input. Use Value: Provides stable 3.6 V reference independent of supply ripple, ensuring reliable reset assertion across temperature and aging. |
| Cellular Phone Battery Monitoring | High-Density PC Board Voltage Rail Clamp |
Use Scenario: Monitoring Li-ion battery voltage via ADC input with overvoltage protection against charger faults. IC Role / Device Role / Timing Role: Bidirectional clamp: forward conducts below 0.95 V, reverse regulates above 3.6 V to protect ADC input. Use Value: Dual-mode protection reduces component count while maintaining ±0.1% reference stability for accurate SOC estimation. |
Use Scenario: Preventing rail collapse during hot-swap insertion in multi-rail embedded systems with tight spacing. IC Role / Device Role / Timing Role: Fast-acting shunt regulator on 3.3 V domain, absorbing surge energy before LDO or PMIC responds. Use Value: Responds within nanoseconds to transients, preserving system uptime without requiring larger-footprint alternatives. |
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 Zener, but 300 mW rating and higher ZZT (60 Ω); SOT-23 package with different marking and date code format | Higher power dissipation suits higher-current regulation; less suitable for ultra-low-leakage monitoring due to 1 μA IR spec | Select BZX84-C3V6 when >225 mW headroom is needed and leakage <0.25 μA is not critical |
| MMBZ5227BS | Identical electrical specs, but in SOD-123 package (3.7 mm × 1.6 mm) - 2.7× larger footprint and 2× higher RJA (1200 °C/W) | Lower thermal performance limits use in high-density layouts; incompatible with fine-pitch SMT lines calibrated for SOT-23 | Choose MMBZ5227BS only if SOD-123 is mandated by legacy board design or manual assembly constraints |
Compared with BZX84-C3V6 and MMBZ5227BS, MMBZ5227BLT1 offers optimal balance of low-profile SOT-23 packaging, 225 mW power handling, and sub-microamp leakage-making it preferred for modern portable electronics where board area, thermal density, and precision regulation coexist.
Availability
MMBZ5227BLT1 is available at Aetrix Electronics and suitable for cellular phone power management, handheld portable voltage clamping, and high-density PC board regulation requiring stable component supply, full RoHS compliance, and AEC-Q101 traceability.
Supply support for MMBZ5227BLT1 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, and consumer markets.
The MMBZ52xxBLT1G series is part of onsemi's precision Zener voltage regulator product line, engineered specifically for space-constrained, high-reliability applications demanding stable reference voltages and robust ESD immunity in portable and automotive electronics.
FAQ
What is the nominal Zener voltage and tolerance of MMBZ5227BLT1?
The MMBZ5227BLT1 has a nominal Zener voltage of 3.6 V with a tolerance of ±5%, meaning its actual Zener voltage falls between 3.42 V and 3.78 V when tested at 20 mA (IZT). This specification is guaranteed across the full operating temperature range and is validated per onsemi's production test flow. The MMBZ5227BLT1 maintains this accuracy without external calibration or trimming.
Does MMBZ5227BLT1 have a connected pin 2, and how should it be handled on the PCB?
No, pin 2 of the MMBZ5227BLT1 is internally not connected (NC) and must remain unconnected on the PCB layout. The device uses a three-terminal SOT-23 package with pin 1 as anode, pin 2 as NC, and pin 3 as cathode - confirmed in the official onsemi datasheet mechanical drawings and electrical characteristics table. Routing or soldering to pin 2 may cause assembly defects or functional failure.
What is the maximum reverse leakage current for MMBZ5227BLT1, and at what voltage is it specified?
The MMBZ5227BLT1 specifies a maximum reverse leakage current (IR) of 0.25 μA at a reverse voltage (VR) of 1 V, measured at 25°C ambient temperature. This ultra-low leakage supports long battery life in always-on monitoring circuits. The value remains ≤1 μA even at 15 V reverse bias, per typical characterization curves in the datasheet.
Is MMBZ5227BLT1 suitable for automotive applications, and what qualification does it hold?
The standard MMBZ5227BLT1 is not AEC-Q101 qualified; however, its automotive-grade counterpart SZMMBZ5227BLT1G is fully AEC-Q101 qualified and PPAP capable. Both share identical electrical parameters, but only the SZ-prefix version meets automotive reliability requirements including extended temperature cycling, humidity testing, and failure analysis protocols. For non-automotive industrial use, MMBZ5227BLT1 is fully appropriate.
How does the thermal resistance of MMBZ5227BLT1 affect its power handling on a standard PCB?
The MMBZ5227BLT1 has a junction-to-ambient thermal resistance (RJA) of 556 °C/W when mounted on an FR-5 board, meaning each 1°C rise above ambient requires dissipating only ~1.8 mW. At 25°C ambient, its 225 mW rating drops linearly - e.g., at 75°C board temperature, usable power reduces to ~135 mW. This derating behavior must be included in thermal margin calculations for sustained operation.
MMBZ5227BLT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 225 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:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MMBZ5227BLT1 FAQ
1.How can I place an order for MMBZ5227BLT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5227BLT1 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 MMBZ5227BLT1 reliable?
The price and inventory of MMBZ5227BLT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5227BLT1 is usually 5 days.
3.What payment methods are accepted for MMBZ5227BLT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5227BLT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5227BLT1?
MMBZ5227BLT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5227BLT1 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 MMBZ5227BLT1?
For technical support, including MMBZ5227BLT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5227BLT1 requirements.
6.How does Aetrix verify that MMBZ5227BLT1 is sourced from the original manufacturer or authorized distributors?
All MMBZ5227BLT1 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 MMBZ5227BLT1 meets industry standards.
7.What is the process for return or replacement of MMBZ5227BLT1?
All MMBZ5227BLT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5227BLT1, 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 MMBZ5227BLT1 part is unused and in its original packaging.
Return procedure for MMBZ5227BLT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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