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Diodes Incorporated MMBZ5252BQ-7-F
- Part No.:
- MMBZ5252BQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5252BQ-7-F.pdf
- Description:
- DIODE ZENER 24V 350MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:7,819
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Product details
Overview
MMBZ5252BQ-7-F from Diodes Incorporated is a 24 V ±5% surface-mount Zener diode in SOT23 package, rated for 350 mW power dissipation at 25°C, with 33 Ω zener impedance at 5.2 mA test current 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 MMBZ5252BQ-7-F datasheet, MMBZ5252BQ-7-F pinout, MMBZ5252BQ-7-F application, or MMBZ5252BQ-7-F equivalent, key selection criteria include nominal zener voltage tolerance, dynamic impedance at specified test current, thermal derating behavior on FR-4, and compatibility with automated SMT assembly processes.
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 noise performance across production lots.
The device exhibits a typical zener impedance of 33 Ω at IZT = 5.2 mA and maintains ≤0.1 µA reverse leakage up to 18 V, enabling reliable clamping in signal conditioning and supply rail supervision circuits without loading sensitive nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nominal) | 24 V - precise DC reference for feedback loops and voltage monitoring |
| Zener Voltage Range | 22.8 V to 25.2 V - ±5% tolerance ensures predictable clamping threshold |
| Power Dissipation | 350 mW on FR-4 PCB - defines maximum continuous power handling in standard layout |
| Zener Impedance | 33 Ω @ 5.2 mA - low dynamic resistance minimizes output voltage variation under load changes |
| Reverse Leakage | 0.1 µA @ 18 V - negligible standby current preserves battery life in always-on circuits |
| Thermal Resistance | 357 °C/W - quantifies junction-to-ambient temperature rise per watt dissipated |
| Operating Temp | –65°C to +150°C - supports industrial and automotive under-hood environments |
Pinout & Package
Package: SOT23 - compact 3-pin surface-mount plastic package with matte tin-plated alloy 42 leadframe, moisture sensitivity level 1, UL 94V-0 rated molding compound, weight ≈0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower potential node during normal operation; forms cathode-anode junction for reverse-bias regulation |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher potential node; voltage referenced to anode during regulation; primary current entry point in breakdown |
| No Connect (Pin 3) | Internal die attach pad | Electrically isolated from die; serves mechanical support only; must not be connected in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight parametric distribution and repeatable breakdown voltage across wafers |
| 350 mW dissipation on FR-4 | Validated thermal performance using JEDEC-standard PCB layout, no heatsink required |
| Lead-free & RoHS 3 compliant | Fully compliant with EU Directive 2015/863/EU; <900 ppm Br+Cl, <1000 ppm Sb |
| SOT23 tape-and-reel packaging | 3,000 units per reel (7-inch) optimized for high-speed pick-and-place placement |
| AEC-Q200 stress qualification | Qualified per AEC-Q200 Rev H for passive components; suitable for automotive electronics |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
|
Use Scenario: Stabilizing reference voltage for 12-bit ADC front-end in temperature transmitters operating from 24 V loop power. IC Role / Device Role / Timing Role: Zener diode provides low-drift 24 V shunt reference for op-amp biasing and sensor excitation. Use Value: ±5% voltage tolerance and 33 Ω impedance ensure <±2 LSB error contribution across –40°C to +85°C ambient range. |
Use Scenario: Clamping transient surges on USB VBUS line caused by hot-plug incompatibility or ESD events. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage to 25.2 V peak before TVS activation. Use Value: 0.1 µA leakage at 18 V prevents false triggering while maintaining low standby power in portable devices. |
| Automotive Body Control Module (BCM) Power Monitoring | Low-Power IoT Node Voltage Supervision |
|
Use Scenario: Detecting brown-out conditions on 12 V supply rail in BCM microcontroller reset circuitry. IC Role / Device Role / Timing Role: Zener-based comparator reference enabling accurate undervoltage lockout at 11.4 V threshold. Use Value: AEC-Q200 qualification and –65°C to +150°C rating ensure reliability in engine compartment mounting locations. |
Use Scenario: Providing watchdog reset trigger when coin-cell-supplied MCU supply drops below safe operating voltage. IC Role / Device Role / Timing Role: Shunt regulator establishes stable 24 V reference for voltage divider network feeding supervisor IC. Use Value: 350 mW rating allows brief surge absorption during wake-up transitions without thermal runaway. |
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 ±5%, 300 mW, 35 Ω ZZT @ 5 mA, SOT23 package | Lower power rating reduces margin in sustained overload conditions | Select when cost sensitivity outweighs 50 mW derating requirement |
| MMBZ5252BS-7-F | Identical electrical specs, but SOT23-3L variant with different pin 3 function (not NC) | Requires updated PCB footprint and layout review due to pin 3 connectivity | Choose only if legacy board reuse mandates identical pinout mapping |
Compared with BZX84-C24LT1G and MMBZ5252BS-7-F, MMBZ5252BQ-7-F offers superior thermal margin on FR-4 (350 mW vs. 300 mW), guaranteed NC pin 3 isolation for simplified layout, and AEC-Q200 qualification for automotive-grade traceability.
Availability
MMBZ5252BQ-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB power protection circuits, and automotive body control modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MMBZ5252BQ-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.
This part belongs to the MMBZ52xxB series of precision Zener diodes designed specifically for voltage regulation, reference, and overvoltage protection in space-constrained, high-reliability applications including automotive, industrial, and consumer electronics.
FAQ
What is the maximum continuous reverse voltage that MMBZ5252BQ-7-F can safely clamp?
The device is rated for 24 V nominal zener voltage with a 25.2 V maximum at +25°C. Per the datasheet, it maintains ≤0.1 µA leakage up to 18 V, and its absolute maximum reverse voltage is defined by the 25.2 V upper limit of the zener range - exceeding this risks irreversible breakdown or parametric shift. Derating applies above 25°C ambient.
Does MMBZ5252BQ-7-F require external current-limiting resistors in all applications?
Yes - like all Zener diodes, it requires a series current-limiting resistor to set operating current within the 0.25 mA to 5.2 mA range specified for stable regulation. The resistor value is calculated using (VIN – 24 V)/IZ, where IZ is selected based on desired impedance and power budget.
Is the "Q" suffix in MMBZ5252BQ-7-F indicative of automotive qualification?
No - the "Q" denotes Diodes Incorporated's internal quality grade designation for enhanced process control and tighter parametric screening, not AEC-Q101 qualification. For automotive-grade parts, look for "-AQ" or "-Q" suffixes explicitly qualified to AEC-Q200 (passive) or AEC-Q101 (discrete), such as MMBZ5252BQ-AQ-7-F.
Can MMBZ5252BQ-7-F be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficient and mismatched breakdown voltages, causing current hogging and thermal runaway when paralleled. For higher power, use a single higher-rated device (e.g., 1 W through-hole Zener) or implement active regulation with a transistor-based shunt.
MMBZ5252BQ-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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MMBZ5252BQ-7-F FAQ
1.How can I place an order for MMBZ5252BQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5252BQ-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 MMBZ5252BQ-7-F reliable?
The price and inventory of MMBZ5252BQ-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 MMBZ5252BQ-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5252BQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5252BQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5252BQ-7-F?
MMBZ5252BQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5252BQ-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 MMBZ5252BQ-7-F?
For technical support, including MMBZ5252BQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5252BQ-7-F requirements.
6.How does Aetrix verify that MMBZ5252BQ-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5252BQ-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 MMBZ5252BQ-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5252BQ-7-F?
All MMBZ5252BQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5252BQ-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 MMBZ5252BQ-7-F part is unused and in its original packaging.
Return procedure for MMBZ5252BQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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