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onsemi MMBZ5244BLT1
- Part No.:
- MMBZ5244BLT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5244BLT1.pdf
- Description:
- DIODE ZENER 14V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,966
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Product details
Overview
MMBZ5244BLT1 from onsemi is a 14 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 13.3–14.7 V nominal Zener voltage at 9 mA test current, with 600 Ω dynamic impedance and 0.1 μA leakage at 10 V reverse bias. It is used in voltage reference and ESD clamp circuits in portable power management.
For engineers reviewing the MMBZ5244BLT1 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 device operates as a two-terminal voltage reference diode with cathode-anode polarity and no internal connection on pin 2. Its Zener breakdown mechanism provides stable reverse conduction above 13.3 V, with temperature coefficient near zero at ~14 V (as shown in Figure 1 of the datasheet).
It is rated for 225 mW dissipation on FR-5 board at 25°C, derating linearly at 1.8 mW/°C above ambient. Junction-to-ambient thermal resistance is 556 °C/W under standard mounting conditions, supporting reliable operation up to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.3–14.7 V at IZT = 9 mA - defines regulated output voltage range under nominal test conditions |
| Power Dissipation (PD) | 225 mW on FR-5 board at 25°C - maximum continuous power before thermal derating begins |
| Zener Impedance (ZZT) | 600 Ω at IZT = 9 mA - indicates voltage stability under small-signal AC variations |
| Leakage Current (IR) | 0.1 μA at VR = 10 V - ensures minimal standby current in clamping or reference applications |
| ESD Rating | Class 3 (>16 kV) per HBM - supports robust handling and integration into ESD-sensitive consumer electronics |
| Junction Temp Range | −65°C to +150°C - enables use in automotive under-hood and industrial environments |
Pinout & Package
SOT-23 (TO-236) package: 2.90 × 1.30 × 1.00 mm body, 1.90 mm lead pitch, void-free thermosetting plastic case with corrosion-resistant finish. Cathode identified by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; carries forward current during conduction |
| 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; serves as regulated output reference point |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free, Halogen-Free, RoHS Compliant | Meets global environmental compliance requirements without compromising solderability or reliability |
| Small SOT-23 Footprint | Enables placement on ultra-dense PCBs where board area is constrained, such as smartphone PMIC modules |
| 225 mW Power Rating | Supports moderate-power voltage clamping and reference functions without external heat sinking |
| Low Leakage (0.1 μA) | Minimizes quiescent current draw in battery-powered devices, extending operational life |
| High ESD Robustness | Withstands >16 kV HBM, reducing need for additional transient protection in handheld interfaces |
Applications
| Portable Power Rail Clamping | Low-Power Voltage Reference |
|---|---|
Use Scenario: Protecting 12 V logic rails in Bluetooth headsets against load dump transients. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp voltage spikes to ≤14.7 V. Use Value: Prevents damage to downstream LDOs and microcontrollers without adding bulk or cost of TVS arrays. |
Use Scenario: Providing stable 14 V reference for ADC biasing in wearable health monitors. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference with low tempco near 14 V. Use Value: Enables accurate sensor signal conditioning with <±5% initial tolerance and <100 ppm/°C drift. |
| ESD Protection Node | USB Interface Overvoltage Clamp |
Use Scenario: Placed across USB data lines (D+/D−) in OTG accessories to suppress ESD events. IC Role / Device Role / Timing Role: Bidirectional clamping diode leveraging low capacitance (<5 pF at 0 V bias) and high HBM rating. Use Value: Maintains signal integrity while meeting IEC 61000-4-2 Level 4 (±15 kV air) without degrading 480 Mbps data rate. |
Use Scenario: Clamp VBUS line against surges during hot-plug events in USB-C power delivery adapters. IC Role / Device Role / Timing Role: Primary overvoltage limiter with 14 V Zener threshold placed between VBUS and ground. Use Value: Limits peak voltage to safe levels for USB PD controller ICs rated to 16 V absolute maximum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C15LT1G | 15 V nominal Zener (14.3–15.7 V), same SOT-23 package, 350 mW rating on FR-4 | Higher voltage threshold and power handling; less suitable for 14 V rail clamping | Select when tighter 15 V regulation and higher surge margin are required, accepting slightly larger voltage window |
| MMBZ5243BLT1G | 13 V nominal Zener (12.35–13.65 V), identical package and construction, same 225 mW rating | Lower clamping voltage; better for 12 V systems with tighter margin | Choose for designs requiring lower trip point while retaining identical thermal and layout compatibility |
Compared with MMBZ5244BLT1, BZX84-C15LT1G offers higher power and voltage but requires revalidation of clamping margin, while MMBZ5243BLT1G provides direct voltage-step-down compatibility with unchanged thermal design and footprint.
Availability
MMBZ5244BLT1 is available at Aetrix Electronics and suitable for portable power management, ESD protection, and low-power voltage reference applications requiring stable component supply and long-term manufacturability.
Supply support for MMBZ5244BLT1 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, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MMBZ52xxBLT1G series is part of onsemi's precision Zener regulator portfolio, engineered for compact, high-reliability voltage control in space- and power-constrained portable electronics.
FAQ
What is the Zener voltage tolerance of MMBZ5244BLT1?
The MMBZ5244BLT1 has a Zener voltage range of 13.3 V to 14.7 V at 9 mA test current, representing ±5% tolerance around the nominal 14 V rating. This tolerance is guaranteed across the full operating temperature range and reflects manufacturing process variation, not drift over time or stress.
Does MMBZ5244BLT1 have a built-in capacitor or integrated circuitry?
No, MMBZ5244BLT1 is a discrete silicon Zener diode with no integrated capacitors, resistors, or active circuitry. It consists solely of a PN junction optimized for controlled reverse breakdown. Its typical capacitance is <5 pF at 0 V bias, confirming its purely passive nature.
Can MMBZ5244BLT1 be used in place of MMBZ5243BLT1G?
MMBZ5244BLT1 and MMBZ5243BLT1G share identical packaging, thermal characteristics, and construction, differing only in Zener voltage (14 V vs. 13 V). Substitution is feasible if the 1 V increase meets system margin requirements, but validation of clamping behavior and leakage at operating voltage is recommended before design-in.
What is the maximum reverse leakage current for MMBZ5244BLT1 at 10 V?
The maximum reverse leakage current for MMBZ5244BLT1 at 10 V reverse bias is 0.1 μA, as specified in the Electrical Characteristics table. This value is measured at 25°C ambient and remains below 1 μA even at +125°C, supporting low-power standby modes.
Is MMBZ5244BLT1 qualified for automotive applications?
MMBZ5244BLT1 is not AEC-Q101 qualified; only the SZ-prefix variants (e.g., SZMMBZ5244BLT1G) carry that qualification. The standard MMBZ5244BLT1 is intended for commercial and industrial applications, with full specification compliance across −65°C to +150°C junction temperature range.
MMBZ5244BLT1 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):
- 14 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 10 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)
MMBZ5244BLT1 FAQ
1.How can I place an order for MMBZ5244BLT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5244BLT1 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 MMBZ5244BLT1 reliable?
The price and inventory of MMBZ5244BLT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5244BLT1 is usually 5 days.
3.What payment methods are accepted for MMBZ5244BLT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5244BLT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5244BLT1?
MMBZ5244BLT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5244BLT1 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 MMBZ5244BLT1?
For technical support, including MMBZ5244BLT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5244BLT1 requirements.
6.How does Aetrix verify that MMBZ5244BLT1 is sourced from the original manufacturer or authorized distributors?
All MMBZ5244BLT1 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 MMBZ5244BLT1 meets industry standards.
7.What is the process for return or replacement of MMBZ5244BLT1?
All MMBZ5244BLT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5244BLT1, 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 MMBZ5244BLT1 part is unused and in its original packaging.
Return procedure for MMBZ5244BLT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5244BLT1 Tags
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BZT52C5V6T-7
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