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onsemi MMBZ5252BLT1
- Part No.:
- MMBZ5252BLT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5252BLT1.pdf
- Description:
- DIODE ZENER 24V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,621
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Product details
Overview
MMBZ5252BLT1 from onsemi is a 24 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 5.2 mA test current, 33 Ω dynamic impedance at IZT, and 0.1 μA leakage at 18 V reverse bias. It provides precision voltage regulation in space-constrained portable electronics.
For engineers reviewing the MMBZ5252BLT1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, ESD robustness (Class 3, >16 kV HBM), and validated alternative options for voltage reference and overvoltage protection designs.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, requiring no external biasing circuitry. Its Zener breakdown mechanism delivers stable reverse conduction at nominal 24 V with ±5% tolerance across production lots and temperature range −65°C to +150°C.
Thermal performance is defined by 556°C/W junction-to-ambient resistance on FR-5 board, enabling predictable derating to 1.8 mW/°C above 25°C ambient. The SOT-23 package supports automated placement and reflow soldering up to 260°C for 10 seconds without damage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.8 V min / 24 V nom / 25.2 V max @ IZT = 5.2 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 before thermal shutdown risk |
| Zener Impedance (ZZT) | 33 Ω max @ IZT = 5.2 mA - determines AC voltage regulation stability under varying load currents |
| Reverse Leakage (IR) | 0.1 μA max @ VR = 18 V - ensures minimal standby current in undervoltage clamp configurations |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - guarantees survivability during manual handling and board assembly |
| Junction Temp Range | −65°C to +150°C - supports operation in automotive under-hood and industrial control environments |
Pinout & Package
SOT-23 (TO-236) surface-mount package, 2.90 mm × 1.30 mm × 1.00 mm body size, void-free thermosetting plastic case with corrosion-resistant finish. Cathode identified by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; carries forward current when used as rectifier |
| 2 | No Connection | Internally unconnected terminal; must remain floating - no PCB trace or pad required |
| 3 | Cathode | Connected to higher-potential node in Zener mode; defines regulated voltage reference point at cathode-to-anode drop |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free, Halogen-Free/BFR-Free | RoHS-compliant construction meets global environmental compliance requirements without compromising reliability |
| Small SOT-23 footprint | Enables high-density PCB layouts in smartphones, wearables, and IoT sensor nodes where board area is constrained |
| 225 mW FR-5 rating | Supports stable voltage clamping in low-power signal conditioning circuits without heatsinking |
| UL 94 V-0 flammability | Ensures flame-retardant behavior during fault conditions in consumer and industrial end equipment |
Applications
| Portable Power Management | Automotive Sensor Interface |
|---|---|
Use Scenario: Voltage reference for ADC biasing and LDO feedback networks in battery-powered medical monitors. IC Role / Device Role / Timing Role: Zener diode providing stable 24 V reference point for analog front-end calibration. Use Value: Tight 5% VZ tolerance and low 33 Ω ZZT ensure <±1 LSB error in 12-bit ADC systems operating across −20°C to +70°C. |
Use Scenario: Overvoltage clamp protecting CAN transceiver inputs against load-dump transients in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Standby shunt regulator absorbing transient energy above 25.2 V threshold. Use Value: 0.1 μA leakage at 18 V prevents false triggering while 225 mW rating handles 100 ms pulses per ISO 7637-2 Pulse 5a. |
| Industrial PLC Input Protection | USB-C Power Negotiation Reference |
Use Scenario: Input stage protection for 24 V digital input modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary clamping element limiting voltage to safe levels before optocoupler input. Use Value: Class 3 ESD rating (>16 kV HBM) eliminates need for external TVS in cost-sensitive DIN-rail mounted controllers. |
Use Scenario: Precision voltage reference for USB PD sink controller monitoring VBUS during contract negotiation. IC Role / Device Role / Timing Role: Stable 24 V Zener source feeding comparator threshold network. Use Value: Minimal temperature coefficient drift (<±3 mV/°C near 24 V) maintains accurate detection across ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5252BLT1G | Identical electrical specs; Pb-free marking suffix 'G' confirms RoHS compliance per datasheet revision | No functional difference; same SOT-23 package, pinout, and thermal profile | Select MMBZ5252BLT1G when full RoHS documentation traceability is required for final product certification |
| SZMMBZ5252BLT1G | Same Zener voltage and impedance; AEC-Q101 qualified with PPAP capability and automotive-specific process controls | Required for automotive ECUs; not recommended for non-automotive use due to qualification overhead | Choose SZMMBZ5252BLT1G only when designing to automotive ASIL-B or higher functional safety requirements |
Compared with MMBZ5252BLT1, MMBZ5252BLT1G offers identical performance with enhanced compliance documentation, while SZMMBZ5252BLT1G adds automotive qualification at no electrical trade-off - enabling direct substitution where AEC-Q101 is mandated but not otherwise needed.
Availability
MMBZ5252BLT1 is available at Aetrix Electronics and suitable for portable power management, automotive sensor interface, industrial PLC input protection, and USB-C power negotiation requiring stable component supply with consistent parametric performance across production lots.
Supply support for MMBZ5252BLT1 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, and consumer markets.
The MMBZ52xxBLT1G series is designed for compact, high-reliability voltage regulation in space-constrained portable and automotive electronics, emphasizing low leakage, tight tolerance, and robust ESD immunity.
FAQ
What is the Zener voltage tolerance of MMBZ5252BLT1?
The MMBZ5252BLT1 has a Zener voltage tolerance of ±5% around its nominal 24 V rating, meaning the actual measured VZ falls between 22.8 V and 25.2 V at IZT = 5.2 mA and TA = 25°C. This tolerance remains valid across the full operating temperature range of −65°C to +150°C as confirmed in the onsemi datasheet Electrical Characteristics table.
Does MMBZ5252BLT1 support automated PCB assembly?
Yes, MMBZ5252BLT1 uses the SOT-23 package optimized for automated board assembly, with a 2.90 mm × 1.30 mm footprint and lead pitch of 1.90 mm. It withstands standard reflow profiles up to 260°C for 10 seconds, and its corrosion-resistant finish ensures reliable solder wetting on FR-4 and FR-5 substrates - all explicitly stated in the Mechanical Characteristics section of the MMBZ5252BLT1 datasheet.
What is the maximum reverse leakage current for MMBZ5252BLT1?
The maximum reverse leakage current for MMBZ5252BLT1 is 0.1 μA at VR = 18 V and TA = 25°C, as specified in the Electrical Characteristics table. This low leakage enables reliable use in high-impedance reference circuits and battery-backed systems where standby current must be minimized without sacrificing regulation accuracy.
Is MMBZ5252BLT1 RoHS compliant?
Yes, MMBZ5252BLT1 is RoHS compliant, Pb-free, and halogen-free/BFR-free as confirmed in the Features section of the official onsemi datasheet. The "M" in the marking diagram denotes Pb-free packaging, and the device meets EU Directive 2011/65/EU requirements without requiring additional compliance documentation beyond standard onsemi declarations.
How does thermal derating work for MMBZ5252BLT1 on FR-5 board?
MMBZ5252BLT1 is rated for 225 mW total power dissipation at TA = 25°C on FR-5 board, with linear derating of 1.8 mW/°C above that temperature. This means at 65°C ambient, maximum allowable power drops to 225 mW − (40°C × 1.8 mW/°C) = 153 mW - a value directly extractable from the Maximum Ratings table in the MMBZ5252BLT1 datasheet.
MMBZ5252BLT1 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):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 33 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 18 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)
MMBZ5252BLT1 FAQ
1.How can I place an order for MMBZ5252BLT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5252BLT1 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 MMBZ5252BLT1 reliable?
The price and inventory of MMBZ5252BLT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5252BLT1 is usually 5 days.
3.What payment methods are accepted for MMBZ5252BLT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5252BLT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5252BLT1?
MMBZ5252BLT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5252BLT1 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 MMBZ5252BLT1?
For technical support, including MMBZ5252BLT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5252BLT1 requirements.
6.How does Aetrix verify that MMBZ5252BLT1 is sourced from the original manufacturer or authorized distributors?
All MMBZ5252BLT1 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 MMBZ5252BLT1 meets industry standards.
7.What is the process for return or replacement of MMBZ5252BLT1?
All MMBZ5252BLT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5252BLT1, 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 MMBZ5252BLT1 part is unused and in its original packaging.
Return procedure for MMBZ5252BLT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5252BLT1 Tags
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