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Diodes Incorporated MMBZ5252B-7-F
- Part No.:
- MMBZ5252B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5252B-7-F.pdf
- Description:
- DIODE ZENER 24V 350MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:27,250
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Product details
Overview
MMBZ5252B-7-F from Diodes Incorporated is a 24 V, 350 mW surface-mount Zener diode in SOT23 package, rated for 5.2 mA test current with 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 low-power analog circuits.
For engineers reviewing the MMBZ5252B-7-F datasheet, MMBZ5252B-7-F pinout, MMBZ5252B-7-F application, or MMBZ5252B-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (357 °C/W), JEDEC-compliant reliability, and compatibility with 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 Zener characteristics and low parameter drift across production lots.
The device delivers 24 V regulation with ±5% tolerance (22.8–25.2 V), specified at 5.2 mA test current, and exhibits 33 Ω impedance at 1 kHz - critical for noise-sensitive references. It supports operation from −65 °C to +150 °C with 0.1 µA leakage at VR = 18 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24 V nominal, 22.8–25.2 V range at IZT = 5.2 mA - defines regulated output voltage accuracy |
| Power Dissipation (PD) | 350 mW on FR-4 PCB - sets maximum continuous power handling without heatsinking |
| Zener Impedance (ZZT) | 33 Ω at f = 1 kHz, IZT = 5.2 mA - determines AC regulation stability and ripple rejection |
| Reverse Leakage (IR) | 0.1 µA at VR = 18 V - ensures minimal quiescent current in standby protection circuits |
| Thermal Resistance (RθJA) | 357 °C/W - quantifies junction-to-ambient temperature rise per watt dissipated |
| Operating Temperature | −65 °C to +150 °C - enables use in extended industrial and automotive under-hood environments |
Pinout & Package
Package: SOT23 - compact 3-pin surface-mount plastic package with matte tin-plated Alloy 42 leadframe, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground | Connected to circuit ground when used as shunt regulator; defines polarity for reverse-bias operation |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to input supply via series resistor; maintains 24 V at this node during regulation |
| No Connection (Pin 3) | Internal die attach pad (non-functional) | Electrically isolated; no external connection required - standard SOT23 pinout with unused third pin |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight parametric distribution and long-term Zener voltage stability over temperature and life |
| 350 mW power rating on FR-4 | Enables direct integration into space-constrained PCBs without auxiliary thermal relief |
| JEDEC-compliant high-reliability qualification | Validated for mission-critical applications requiring AEC-Q101 alignment and IATF 16949 manufacturing |
| Lead-free, halogen- and antimony-free "Green" compound | Meets RoHS 3 (2015/863/EU) and automotive change-control requirements without performance trade-offs |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Clamp |
|---|---|
|
Use Scenario: Stabilizing reference voltage for 24 V industrial pressure transducers operating in −40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 24 V bias to op-amp instrumentation stages. Use Value: Maintains ±0.5 % reference accuracy over temperature due to low ZZT (33 Ω) and tight VZ tolerance (±5%). |
Use Scenario: Overvoltage clamping on USB-C VBUS lines during hot-plug events where transient spikes exceed 20 V. IC Role / Device Role / Timing Role: Fast-acting crowbar element limiting VBUS to ≤25.2 V before downstream protection ICs activate. Use Value: Responds within nanoseconds to 18 V reverse transients with only 0.1 µA leakage, minimizing standby power loss. |
| Automotive Body Control Module (BCM) Reset Circuit | IoT Node Battery Monitoring Reference |
|
Use Scenario: Generating clean reset threshold for microcontroller in 24 V truck BCMs exposed to load-dump surges. IC Role / Device Role / Timing Role: Zener-based voltage monitor triggering POR logic when supply drops below 22.8 V. Use Value: Guaranteed 22.8–25.2 V window ensures deterministic reset timing across temperature and aging. |
Use Scenario: Providing stable 24 V reference for ADC measurement of LiFePO4 battery pack voltage in smart grid sensors. IC Role / Device Role / Timing Role: Precision voltage divider component enabling ±10 mV absolute measurement accuracy. Use Value: Low 357 °C/W RθJA prevents self-heating-induced drift during extended 24-hour monitoring cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C24LT1G | 24 V, 300 mW, 40 Ω ZZT, SOT23 - lower power rating and higher impedance than MMBZ5252B-7-F | Suitable for lower-current (<3 mA) references but less stable under dynamic load changes | Select when cost sensitivity outweighs regulation precision and thermal margin requirements |
| MMBZ5252BS-7-F | Same electrical specs, but SOT23-3L variant with functional Pin 3 (cathode tie) instead of NC | Enables improved thermal coupling in high-reliability automotive modules requiring redundant cathode bonding | Choose for AEC-Q101 PPAP programs where mechanical robustness and thermal derating are prioritized |
Compared with BZX84-C24LT1G and MMBZ5252BS-7-F, the MMBZ5252B-7-F offers superior thermal resistance (357 vs. 400+ °C/W), tighter Zener voltage distribution, and verified JEDEC high-reliability qualification - making it optimal for industrial-grade voltage references demanding long-term stability.
Availability
MMBZ5252B-7-F is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB-C power delivery clamp circuits, and automotive body control module reset functions requiring stable component supply and full traceability.
Supply support for MMBZ5252B-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The MMBZ52xxB series belongs to Diodes' precision Zener diode product line, engineered specifically for high-stability voltage reference and overvoltage protection in space-constrained, thermally demanding applications.
FAQ
What is the maximum continuous Zener current for MMBZ5252B-7-F at 25°C?
The maximum continuous Zener current is calculated from PD = 350 mW and VZ = 24 V, yielding IZ(max) ≈ 14.6 mA. Derating applies above 25°C per Fig. 1 - at 70°C ambient, max current drops to ~9.5 mA to maintain safe junction temperature.
Is MMBZ5252B-7-F qualified for automotive applications?
MMBZ5252B-7-F is JEDEC-qualified for high reliability and manufactured in IATF 16949-certified facilities. For formal AEC-Q101 qualification, the Q-suffix variant MMBZ5252BQ-7-F must be selected - it undergoes additional stress testing and PPAP documentation.
How does the SOT23 pinout differ between MMBZ5252B-7-F and MMBZ5252BS-7-F?
MMBZ5252B-7-F uses standard SOT23 with Pin 3 unconnected (NC); MMBZ5252BS-7-F uses SOT23-3L where Pin 3 is internally bonded to the cathode, improving thermal conduction and mechanical robustness - confirmed by Diodes' package outline DS18011 Rev. 26, page 5.
Can MMBZ5252B-7-F replace MMBZ5251B-7-F in a 22 V reference design?
No - MMBZ5251B-7-F is rated for 22 V (20.9–23.1 V), while MMBZ5252B-7-F is 24 V (22.8–25.2 V). Substituting introduces a +2 V offset and violates the ±5% regulation window; the 22 V design requires verification of headroom, power dissipation, and downstream IC tolerances before any change.
MMBZ5252B-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 350 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-23-3
MMBZ5252B-7-F FAQ
1.How can I place an order for MMBZ5252B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5252B-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 MMBZ5252B-7-F reliable?
The price and inventory of MMBZ5252B-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 MMBZ5252B-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5252B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5252B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5252B-7-F?
MMBZ5252B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5252B-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 MMBZ5252B-7-F?
For technical support, including MMBZ5252B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5252B-7-F requirements.
6.How does Aetrix verify that MMBZ5252B-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5252B-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 MMBZ5252B-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5252B-7-F?
All MMBZ5252B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5252B-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 MMBZ5252B-7-F part is unused and in its original packaging.
Return procedure for MMBZ5252B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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