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Diodes Incorporated MMBZ5252BT-7-F
- Part No.:
- MMBZ5252BT-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOT-523
- Datasheet:
-
MMBZ5252BT-7-F.pdf
- Description:
- DIODE ZENER 24V 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:8,338
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Product details
Overview
MMBZ5252BT-7-F from Diodes Incorporated is a 24 V, 150 mW surface-mount Zener diode in SOT-523 package, rated for 5.2 mA test current, 33 Ω dynamic impedance at 1 kHz, and 0.1 μA reverse leakage at 18 V, used for precision voltage regulation and overvoltage protection in space-constrained power rails.
For engineers reviewing the MMBZ5252BT-7-F datasheet, MMBZ5252BT-7-F pinout, MMBZ5252BT-7-F application, or MMBZ5252BT-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), low thermal resistance (833 °C/W), RoHS-compliant matte tin plating, and suitability for automated SMT assembly on FR-4 PCBs.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its planar die construction ensures consistent breakdown characteristics and low leakage across -65°C to +150°C operating range.
Designed for low-power regulation, it delivers 24 V ±5% nominal Zener voltage with 33 Ω impedance at 5.2 mA, and exhibits only 0.1 μA reverse leakage at VR = 18 V - enabling reliable clamping in signal conditioning and supply rail supervision circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 24 V - precise DC reference for voltage monitoring and regulation |
| Zener Voltage Range | 22.8 V to 25.2 V - ±5% tolerance ensures predictable clamping threshold |
| Test Current (IZT) | 5.2 mA - standard bias point for specified Zener voltage and impedance |
| Zener Impedance (ZZT) | 33 Ω at 1 kHz - low dynamic resistance minimizes output voltage variation under load transients |
| Power Dissipation | 150 mW - limits continuous dissipation in ultra-small SOT-523 footprint |
| Reverse Leakage (IR) | 0.1 μA at VR = 18 V - negligible standby current in high-impedance sensing paths |
| Thermal Resistance (RθJA) | 833 °C/W - defines junction-to-ambient temperature rise per watt on standard FR-4 layout |
Pinout & Package
Package: SOT-523 - ultra-small surface-mount plastic case (1.6 mm × 0.8 mm × 0.5 mm), UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reverse-biased cathode reference | Connected to lower-potential node when used as shunt regulator or clamp |
| Cathode | Zener breakdown terminal / Voltage reference output | Provides stable 24 V reference relative to anode; marked side on package top view |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT-523 footprint | Enables placement in dense PCB layouts where board space is constrained below 1.3 mm² |
| Planar die construction | Delivers repeatable Zener voltage distribution and improved long-term stability vs. diffused-junction devices |
| Lead-free/RoHS-compliant plating | Matte tin finish over Alloy 42 leadframe meets global environmental compliance without solderability compromise |
| Low reverse leakage (0.1 μA) | Minimizes error in high-impedance reference divider networks and battery-powered sensor interfaces |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Clamp |
|---|---|
Use Scenario: Stabilizing reference voltage for 24 V industrial analog sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Shunt Zener regulator providing stable 24 V reference for ADC input scaling and fault detection circuitry. Use Value: Maintains ±0.5% reference accuracy over temperature (-40°C to +85°C) due to tight 22.8–25.2 V tolerance and low 33 Ω impedance. | Use Scenario: Overvoltage protection on USB-C CC line during hot-plug events. IC Role / Device Role / Timing Role: Transient voltage clamp limiting CC line to ≤24 V during 20 V PD negotiation bursts. Use Value: Responds within nanoseconds to surges up to 100 W (10 ms pulse), preventing controller latch-up without adding series resistance. |
| Automotive Body Control Module (BCM) Supply Rail Monitor | IoT Node Battery Voltage Supervisor |
Use Scenario: Monitoring 24 V vehicle battery rail for undervoltage/overvoltage faults in BCMs. IC Role / Device Role / Timing Role: Precision Zener element in comparator-based window detector circuit. Use Value: Enables detection of >25.2 V overvoltage with <100 mV hysteresis using standard op-amp comparators. | Use Scenario: Low-power voltage supervisor for Li-SOCl₂ primary cells in remote metering nodes. IC Role / Device Role / Timing Role: Reference source for micropower supervisor IC triggering at 24 V system reset threshold. Use Value: Draws only 0.1 μA leakage at 18 V, extending 10-year battery life by minimizing quiescent current in always-on monitoring path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C24LT1G | 24 V, ±5%, 300 mW, SOT-23 package - 2× larger footprint, higher power rating | Suitable for higher-current regulation (>10 mA), less space-constrained designs | Select when >150 mW dissipation or legacy SOT-23 board compatibility is required |
| MMSZ5252ET1G | 24 V, ±5%, 500 mW, SOD-123 package - 3× larger, higher thermal mass, 10× higher leakage (1.0 μA) | Better for surge handling and thermal cycling in automotive under-hood environments | Choose for robustness in high-vibration, wide-temp applications where size is secondary |
Compared with BZX584C24LT1G and MMSZ5252ET1G, MMBZ5252BT-7-F offers the smallest PCB area and lowest leakage, making it optimal for miniaturized, ultra-low-power systems where 150 mW dissipation suffices and SOT-523 placement is supported.
Availability
MMBZ5252BT-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB-C power delivery protection, automotive body control modules, and IoT battery supervisors requiring stable component supply and RoHS-compliant sourcing.
Supply support for MMBZ5252BT-7-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, cost-optimized components for industrial, computing, and consumer markets.
The MMBZ52xxBT series targets space- and power-sensitive voltage reference and protection applications, emphasizing ultra-small packaging, tight Zener tolerances, and compatibility with high-speed automated assembly lines.
FAQ
What is the maximum continuous Zener current for MMBZ5252BT-7-F?
The device is rated for 150 mW total power dissipation. At its nominal 24 V Zener voltage, this corresponds to a maximum continuous Zener current of 6.25 mA (150 mW ÷ 24 V). Derating applies above 25°C ambient per the published power derating curve.
Is MMBZ5252BT-7-F suitable for use in automotive applications?
Yes - it is qualified for operation from -65°C to +150°C and meets AEC-Q200 stress test requirements for passive components. Its RoHS-compliant matte tin plating and SOT-523 package support reflow soldering in automotive PCB assembly, though design validation per specific vehicle ECU environment remains the responsibility of the end user.
How does the SOT-523 package affect thermal performance?
The SOT-523's small pad area and thin mold compound result in high thermal resistance (833 °C/W junction-to-ambient on FR-4). To maintain reliability, keep average power below 50 mW in still-air environments or add copper pour and thermal vias to reduce effective RθJA by up to 40%.
Can MMBZ5252BT-7-F replace older through-hole Zeners like 1N4749A?
No - while both regulate at ~24 V, the MMBZ5252BT-7-F is a surface-mount device with different thermal behavior, lower power rating (150 mW vs. 1 W), and tighter voltage tolerance (±5% vs. ±5% but higher test current). It is not a drop-in replacement; redesign of PCB layout, thermal management, and current-limiting resistor values is required.
MMBZ5252BT-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 150 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:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-523
MMBZ5252BT-7-F FAQ
1.How can I place an order for MMBZ5252BT-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5252BT-7-F 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 MMBZ5252BT-7-F reliable?
The price and inventory of MMBZ5252BT-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5252BT-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5252BT-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5252BT-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5252BT-7-F?
MMBZ5252BT-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5252BT-7-F 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 MMBZ5252BT-7-F?
For technical support, including MMBZ5252BT-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5252BT-7-F requirements.
6.How does Aetrix verify that MMBZ5252BT-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5252BT-7-F 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 MMBZ5252BT-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5252BT-7-F?
All MMBZ5252BT-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5252BT-7-F, 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 MMBZ5252BT-7-F part is unused and in its original packaging.
Return procedure for MMBZ5252BT-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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