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onsemi MMBZ5232ELT1
- Part No.:
- MMBZ5232ELT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5232ELT1.pdf
- Description:
- DIODE ZENER 5.6V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:17,565
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Product details
Overview
MMBZ5232ELT1 from onsemi is a 5.6 V ±5% Zener voltage regulator diode in SOT-23 package, rated for 225 mW power dissipation at 25°C, with 11 Ω dynamic impedance at 20 mA test current and 0.25 μA leakage current at 3 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the MMBZ5232ELT1 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (556 °C/W on FR-5), ESD robustness (>16 kV HBM), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates in reverse-biased Zener breakdown mode to maintain stable voltage regulation across load and line variations. Its 5.6 V nominal Zener voltage exhibits near-zero temperature coefficient (~0.5 mV/°C) within the 4.7–5.9 V range, minimizing drift over −65°C to +150°C junction temperature.
The SOT-23 package features a defined pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode), polarity band marking, and Pb-free construction compliant with RoHS. Thermal performance is specified for FR-5 board (225 mW) and alumina substrate (300 mW), with derating above 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.32–5.88 V @ IZT = 20 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 225 mW @ TA = 25°C on FR-5 board - sets maximum continuous DC power handling in typical PCB environment |
| Zener Impedance (ZZT) | 11 Ω @ IZT = 20 mA - determines AC regulation stability and ripple rejection capability |
| Leakage Current (IR) | 0.25 μA @ VR = 3 V - ensures minimal standby current draw in undervoltage protection circuits |
| ESD Rating | Class 3 (>16 kV) per HBM - provides robust electrostatic discharge immunity during handling and assembly |
| Junction Temp Range | −65°C to +150°C - supports operation in extended industrial and automotive ambient environments |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish; cathode indicated by polarity band; Pb-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential side of Zener circuit; reverse-biased during regulation |
| Pin 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required |
| Pin 3 | Cathode | Connected to higher-potential side; polarity band identifies this terminal for correct orientation |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW Power Rating | Enables compact voltage regulation in space-constrained portable devices without heatsinking |
| ESD Robustness >16 kV (HBM) | Eliminates need for external ESD protection in handheld and consumer interface circuits |
| Small SOT-23 Footprint | Supports high-density PCB layouts in smartphones, wearables, and IoT sensor nodes |
| Low Leakage (0.25 μA @ 3 V) | Minimizes quiescent current in battery-powered systems requiring long sleep-mode endurance |
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements for commercial and industrial end equipment |
Applications
| Smartphone Power Rail Clamping | IoT Sensor Reference Voltage |
|---|---|
Use Scenario: Clamp transient overvoltage on 5 V USB-powered subsystems during hot-plug events or ESD strikes. IC Role / Device Role / Timing Role: Zener clamping diode providing fast (<1 ns response) shunt protection at system input rail. Use Value: Prevents damage to downstream LDOs and PMICs using only 5.6 V regulation threshold and 225 mW peak pulse handling. |
Use Scenario: Provide stable 5.6 V reference for ADC biasing or comparator hysteresis in ultra-low-power environmental sensors. IC Role / Device Role / Timing Role: Precision voltage reference source with <0.5 mV/°C TC and sub-microamp leakage. Use Value: Enables accurate analog measurements over −40°C to +85°C without calibration drift compensation. |
| Wearable Battery Monitoring | Industrial Control Signal Conditioning |
Use Scenario: Monitor lithium-ion cell voltage via resistive divider with Zener-clamped input to MCU ADC. IC Role / Device Role / Timing Role: Input protection and voltage scaling element ensuring ADC input stays within safe 0–5.6 V range. Use Value: Maintains measurement integrity while consuming only 0.25 μA standby current during deep-sleep cycles. |
Use Scenario: Stabilize 5 V logic supply rail against noise and ripple in PLC I/O modules operating in electrically noisy factory environments. IC Role / Device Role / Timing Role: Local shunt regulator maintaining clean reference for optocoupler drivers and level translators. Use Value: Delivers 11 Ω dynamic impedance to suppress high-frequency switching noise coupled onto control rails. |
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-C5V6 | Same 5.6 V nominal Zener, but 300 mW rating and 40 Ω ZZT; SOT-23 package with identical pinout (Anode-NC-Cathode) | Higher power handling suits higher-current regulation; higher impedance reduces AC regulation accuracy | Select BZX84-C5V6 when >225 mW continuous dissipation is required; verify thermal layout supports 300 mW derating |
| MMBZ5232BS | Same electrical specs, but in SOD-123 package (larger, 2-pin, no NC pin); 225 mW rating, 11 Ω ZZT | Requires different PCB footprint; lacks NC pin simplifies routing but eliminates SOT-23 compatibility | Choose MMBZ5232BS only if SOD-123 is already standardized in design; not drop-in for SOT-23 layouts |
Compared with BZX84-C5V6 and MMBZ5232BS, the MMBZ5232ELT1 uniquely balances low dynamic impedance (11 Ω), ultra-low leakage (0.25 μA), and strict SOT-23 footprint compliance-making it optimal for high-precision, space-constrained, low-quiescent-current designs where thermal margin is limited.
Availability
MMBZ5232ELT1 is available at Aetrix Electronics and suitable for smartphone power rail clamping, IoT sensor reference voltage generation, wearable battery monitoring, and industrial control signal conditioning requiring stable component supply and full traceability.
Supply support for MMBZ5232ELT1 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, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MMBZ52xxELT1G series is designed specifically for space-constrained, low-power voltage regulation and transient suppression in portable and high-density electronics-emphasizing small footprint, high ESD immunity, and tight Zener voltage tolerance.
FAQ
What is the exact Zener voltage tolerance of MMBZ5232ELT1?
The MMBZ5232ELT1 has a guaranteed Zener voltage range of 5.32 V to 5.88 V at 20 mA test current (IZT), corresponding to a ±5% tolerance around the nominal 5.6 V value. This specification is verified per onsemi's August 2024 Rev. 9 datasheet and applies under TA = 25°C with pulse testing to minimize self-heating effects.
Does MMBZ5232ELT1 have a functional third pin, and what is its role?
Yes - Pin 2 of the MMBZ5232ELT1 is explicitly designated "No Connection" in the official datasheet and mechanical drawings. It is internally unconnected and must remain floating on the PCB; no trace, pad, or solder connection should be made to Pin 2. The active terminals are only Pin 1 (Anode) and Pin 3 (Cathode).
Can MMBZ5232ELT1 be used in automotive applications?
The standard MMBZ5232ELT1 is not AEC-Q101 qualified. However, the SZMMBZ5232ELT1G variant - which shares identical electrical specs and SOT-23 packaging - is AEC-Q101 qualified and PPAP capable. For automotive use, specify SZMMBZ5232ELT1G instead of MMBZ5232ELT1 to ensure compliance with automotive reliability and change-control requirements.
What is the thermal resistance of MMBZ5232ELT1 on a standard FR-5 PCB?
The junction-to-ambient thermal resistance (RJA) of MMBZ5232ELT1 is 556 °C/W when mounted on an FR-5 board per the datasheet's Note 2 (1.0 × 0.75 × 0.62 inch test board). This value governs temperature rise: at 225 mW dissipation, junction temperature rises ~125°C above ambient - confirming the need for derating above 25°C ambient.
How does the ESD rating of MMBZ5232ELT1 compare to typical silicon diodes?
The MMBZ5232ELT1 achieves Class 3 Human Body Model (HBM) ESD rating (>16 kV), significantly exceeding the 2 kV typical of generic signal diodes. This high immunity stems from optimized process design and is validated per ANSI/ESDA/JEDEC JS-001, making MMBZ5232ELT1 suitable for direct integration into ESD-prone interfaces without supplemental protection components.
MMBZ5232ELT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 5.6 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 11 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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)
MMBZ5232ELT1 FAQ
1.How can I place an order for MMBZ5232ELT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5232ELT1 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 MMBZ5232ELT1 reliable?
The price and inventory of MMBZ5232ELT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5232ELT1 is usually 5 days.
3.What payment methods are accepted for MMBZ5232ELT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5232ELT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5232ELT1?
MMBZ5232ELT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5232ELT1 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 MMBZ5232ELT1?
For technical support, including MMBZ5232ELT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5232ELT1 requirements.
6.How does Aetrix verify that MMBZ5232ELT1 is sourced from the original manufacturer or authorized distributors?
All MMBZ5232ELT1 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 MMBZ5232ELT1 meets industry standards.
7.What is the process for return or replacement of MMBZ5232ELT1?
All MMBZ5232ELT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5232ELT1, 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 MMBZ5232ELT1 part is unused and in its original packaging.
Return procedure for MMBZ5232ELT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5232ELT1 Tags
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