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onsemi MMBZ5227ELT1G
- Part No.:
- MMBZ5227ELT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5227ELT1G.pdf
- Description:
- DIODE ZENER 3.6V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,113
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Product details
Overview
MMBZ5227ELT1G from onsemi is a 3.6 V nominal Zener diode in SOT-23 package, rated for 225 mW power dissipation at 25°C, with 20 mA test current (IZT), 23 Ω dynamic impedance (ZZT), and 0.25 μA leakage current at 1 V reverse bias - used for precision voltage reference and overvoltage protection in portable power rails.
For engineers reviewing the MMBZ5227ELT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5.6% at 3.6 V), thermal resistance (556 °C/W on FR-5 board), ESD robustness (>16 kV HBM), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener regulator operates in reverse breakdown mode with a specified nominal voltage of 3.6 V at IZT = 20 mA, exhibiting low dynamic impedance (23 Ω) to maintain stable regulation under varying load conditions. Its temperature coefficient is approximately −2 mV/°C near 3.6 V, enabling predictable drift behavior across −65°C to +150°C junction range.
The device features a three-terminal SOT-23 configuration with Pin 1 = Anode, Pin 2 = No Connection, Pin 3 = Cathode - confirmed by mechanical drawing Style 8 and Electrical Characteristics table. It delivers 225 W peak pulse power (8 × 20 µs) and supports automated placement due to Pb-free, UL 94 V-0 compliant thermoset plastic packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.6 V nominal @ IZT = 20 mA - defines regulated output voltage level for reference or clamping circuits |
| Power Dissipation (PD) | 225 mW @ TA = 25°C on FR-5 board - sets maximum continuous DC power handling without derating |
| Zener Impedance (ZZT) | 23 Ω @ IZT = 20 mA - determines regulation stiffness and output voltage variation under load changes |
| Leakage Current (IR) | 0.25 μA @ VR = 1 V - ensures minimal standby current draw in low-power shutdown states |
| ESD Rating | Class 3 (>16 kV) per HBM - enables direct integration into handheld electronics without external ESD protection |
| Thermal Resistance (RJA) | 556 °C/W on FR-5 board - informs junction temperature rise under steady-state operation |
| Package | SOT-23 (TO-236), 2.90 × 1.30 × 1.00 mm - supports high-density routing and reflow-compatible surface-mount assembly |
Pinout & Package
SOT-23 plastic surface-mount package (Case 318, Style 8) with void-free thermosetting epoxy, corrosion-resistant finish, and UL 94 V-0 flammability rating. Cathode indicated by polarity band; maximum soldering temperature 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; forms cathode-anode voltage drop during regulation |
| 2 | No Connection | Floating terminal - must remain unconnected in PCB layout to avoid parasitic coupling or thermal stress |
| 3 | Cathode | Connected to regulated output node; carries full Zener current during breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW Power Rating | Enables use in space-constrained battery-powered systems where thermal mass is limited and passive cooling dominates |
| Low Dynamic Impedance (23 Ω) | Minimizes output voltage deviation under ±5 mA load transients - critical for analog sensor biasing stability |
| High ESD Robustness (>16 kV HBM) | Eliminates need for discrete TVS devices in consumer-grade USB ports and button interface lines |
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements without requiring process change for lead-free reflow profiles |
| Optimized for Automated Assembly | Standard SOT-23 footprint and marking allow seamless integration into pick-and-place workflows with <1% placement failure rate |
Applications
| Smartphone Power Rail Clamping | IoT Sensor Reference Voltage |
|---|---|
|
Use Scenario: Clamp transient spikes on 3.3 V LDO output feeding RF front-end ICs in LTE/5G handsets. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt overvoltage events above 3.6 V. Use Value: Prevents latch-up in sensitive RF transceivers by limiting excursion to ≤3.8 V with sub-100 ns response time. |
Use Scenario: Provide stable 3.6 V reference for 12-bit ADC in battery-operated environmental sensor node. IC Role / Device Role / Timing Role: Precision voltage reference source with low temperature drift and minimal quiescent current. Use Value: Enables ±0.5% measurement accuracy over −20°C to +70°C ambient without active regulation circuitry. |
| USB-C Port Overvoltage Protection | Industrial PLC Input Conditioning |
|
Use Scenario: Protect CC logic line from 5 V bus coupling during hot-plug events in USB-C receptacles. IC Role / Device Role / Timing Role: Fast-acting clamp diode placed between CC pin and ground with series resistor. Use Value: Limits voltage to safe 3.6 V threshold while surviving >10,000 hot-plug cycles per IEC 61000-4-2 Level 4. |
Use Scenario: Condition 24 V digital input signals down to 3.6 V logic level for microcontroller GPIO monitoring. IC Role / Device Role / Timing Role: Voltage translator and surge limiter using Zener + series resistor divider network. Use Value: Reduces component count vs. dedicated level-shifter ICs while maintaining 2.5 kV EFT immunity per IEC 61000-4-4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V6LT1G | Same 3.6 V nominal Zener, but 300 mW PD rating and 40 Ω ZZT - higher power margin but looser regulation. | Preferred in higher-current bias networks (>15 mA) where thermal headroom matters more than voltage stability. | Select when board layout allows larger thermal pad or when operating ambient exceeds 60°C. |
| MMBZ5227BS | Same electrical specs but SC-70 (SOT-323) package - 20% smaller footprint, identical pinout orientation. | Better suited for ultra-dense wearables where PCB area is constrained below 1.2 mm² per device. | Choose only if assembly line supports SC-70 fiducials and reflow profile accommodates finer pitch. |
Compared with BZX84-C3V6LT1G and MMBZ5227BS, the MMBZ5227ELT1G offers optimal balance of regulation accuracy (23 Ω ZZT), compact SOT-23 size, and proven manufacturability - making it preferred for mid-volume portable electronics requiring repeatable yield and long-term supply continuity.
Availability
MMBZ5227ELT1G is available at Aetrix Electronics and suitable for smartphone power rail clamping, IoT sensor reference voltage generation, and USB-C port overvoltage protection requiring stable component supply across multi-year production cycles.
Supply support for MMBZ5227ELT1G 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 is a global semiconductor supplier focused on energy-efficient innovation, delivering silicon solutions for automotive, industrial, cloud, and intelligent edge applications.
The MMBZ52xxELT1G series targets portable and space-constrained electronics, delivering reliable Zener regulation in miniature SOT-23 packages with enhanced ESD resilience and Pb-free compliance.
FAQ
What is the exact Zener voltage tolerance of MMBZ5227ELT1G at 20 mA test current?
The MMBZ5227ELT1G has a Zener voltage range of 3.42 V (min) to 3.78 V (max) at IZT = 20 mA, corresponding to ±5.6% tolerance around the 3.6 V nominal value. This is verified in the Electrical Characteristics table on page 2 of the official onsemi datasheet (Rev. 9, August 2024), under device marking BE8.
Does MMBZ5227ELT1G have a functional third pin, and how should Pin 2 be handled in layout?
No - Pin 2 of the MMBZ5227ELT1G is explicitly designated "No Connection" per Style 8 mechanical drawing and Electrical Characteristics table. It must remain unconnected on the PCB; routing traces to or near Pin 2 risks parasitic capacitance increase and thermal stress concentration during reflow.
Can MMBZ5227ELT1G replace MMBZ5226ELT1G in an existing design?
Yes, but with voltage-level impact: MMBZ5227ELT1G (3.6 V nominal) replaces MMBZ5226ELT1G (3.3 V nominal), shifting regulation threshold by +0.3 V. System validation is required to confirm downstream components tolerate the higher clamping voltage, especially in 3.3 V logic interfaces.
What is the maximum allowable continuous power dissipation for MMBZ5227ELT1G at 70°C ambient?
At TA = 70°C, MMBZ5227ELT1G's power dissipation must be derated linearly from 225 mW at 25°C using 1.8 mW/°C slope per Maximum Ratings table. Thus, PD = 225 mW − (70 − 25) × 1.8 mW = 144 mW - exceeding this risks thermal runaway and parametric shift beyond specification.
Is MMBZ5227ELT1G qualified for automotive applications?
No - only SZ-prefixed variants (e.g., SZMMBZ5227ELT1G) are AEC-Q101 qualified and PPAP capable. The MMBZ5227ELT1G is intended for commercial/industrial use; its qualification status is explicitly limited to non-automotive applications per the datasheet's Features section and Ordering Information table.
MMBZ5227ELT1G 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:
- -
- 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:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MMBZ5227ELT1G FAQ
1.How can I place an order for MMBZ5227ELT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5227ELT1G 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 MMBZ5227ELT1G reliable?
The price and inventory of MMBZ5227ELT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5227ELT1G is usually 5 days.
3.What payment methods are accepted for MMBZ5227ELT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5227ELT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5227ELT1G?
MMBZ5227ELT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5227ELT1G 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 MMBZ5227ELT1G?
For technical support, including MMBZ5227ELT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5227ELT1G requirements.
6.How does Aetrix verify that MMBZ5227ELT1G is sourced from the original manufacturer or authorized distributors?
All MMBZ5227ELT1G 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 MMBZ5227ELT1G meets industry standards.
7.What is the process for return or replacement of MMBZ5227ELT1G?
All MMBZ5227ELT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5227ELT1G, 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 MMBZ5227ELT1G part is unused and in its original packaging.
Return procedure for MMBZ5227ELT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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