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Diodes Incorporated MMBZ5241BQ-7-F
- Part No.:
- MMBZ5241BQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5241BQ-7-F.pdf
- Description:
- DIODE ZENER 11V 350MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:9,291
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Product details
Overview
MMBZ5241BQ-7-F from Diodes Incorporated is a 11 V, 350 mW surface-mount Zener diode in SOT23 package, rated for 20 mA test current, 22 Ω dynamic impedance at 1 kHz, and 2.0 µA reverse leakage at 8.4 V, used for precision voltage regulation and overvoltage protection in low-power analog and power management circuits.
For engineers reviewing the MMBZ5241BQ-7-F datasheet, MMBZ5241BQ-7-F pinout, MMBZ5241BQ-7-F application, or MMBZ5241BQ-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (357 °C/W), JEDEC-compliant reliability, automotive-grade availability (Q-suffix variants), and SOT23 footprint compatibility with automated PCB assembly.
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 parameter drift across production lots.
Designed for operation at 20 mA test current, it delivers 11.0 V nominal regulation with ±5% tolerance (10.45–11.55 V), exhibits 22 Ω Zener impedance at 1 kHz, and maintains ≤2.0 µA reverse leakage at VR = 8.4 V - enabling accurate clamping in signal conditioning and supply rail supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.0 V nominal, 10.45–11.55 V range at IZT = 20 mA - defines precise clamping threshold for 12 V rail protection |
| Power Dissipation (PD) | 350 mW on FR-4 PCB - sets maximum continuous dissipation without heatsinking in standard layouts |
| Zener Impedance (ZZT) | 22 Ω at f = 1 kHz, IZT = 20 mA - determines regulation stiffness under dynamic load transients |
| Reverse Leakage (IR) | ≤2.0 µA at VR = 8.4 V - ensures minimal quiescent current in standby-mode protection circuits |
| Thermal Resistance (RθJA) | 357 °C/W - quantifies junction-to-ambient temperature rise per watt, critical for derating above +25°C |
| Operating Temperature | −65 °C to +150 °C - supports industrial and under-hood automotive environments without performance loss |
Pinout & Package
Package: SOT23 - 3-terminal 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 / cathode reference ground | Connected to system ground or lower-potential node during Zener operation; required for proper reverse-bias orientation |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to protected node (e.g., IC supply pin); sinks current to clamp voltage at VZ |
| No-Connect (Pin 3) | Unused internal lead | Electrically isolated; no routing or soldering required - simplifies layout and avoids parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight VZ distribution (±5%) and long-term stability under thermal cycling |
| 350 mW dissipation on FR-4 | Enables direct integration into cost-sensitive consumer and industrial PCBs without auxiliary cooling |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU with <900 ppm Br+Cl and <1000 ppm Sb - supports global environmental compliance |
| AEC-Q200 qualified variants available | Q-suffix versions manufactured in IATF 16949 facilities - suitable for automotive ECU and body electronics |
Applications
| USB Power Rail Protection | Industrial Sensor Reference |
|---|---|
|
Use Scenario: Clamping 5 V USB VBUS against surge events in portable docking stations. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to limit voltage excursion to ≤11.55 V. Use Value: Prevents damage to downstream USB controllers by absorbing transient energy within its 350 mW rating. |
Use Scenario: Providing stable 11 V reference for 16-bit ADC biasing in factory-floor temperature sensors. IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed reference potential independent of supply ripple. Use Value: Enables <±0.5 LSB offset error over −40 °C to +105 °C due to low ZZT and tight VZ tolerance. |
| Automotive LIN Bus Interface | IoT Node Battery Monitor |
|
Use Scenario: Overvoltage protection on LIN transceiver VCC pin exposed to 12 V battery transients. IC Role / Device Role / Timing Role: Fast-response shunt clamp activated during load-dump events (>18 V). Use Value: Survives 100 ms pulses up to 24 V with <1% VZ shift, validated per AEC-Q200 stress profiles. |
Use Scenario: Low-current voltage detection in coin-cell-powered asset trackers monitoring battery health. IC Role / Device Role / Timing Role: High-impedance Zener sensing cell voltage decay via microcontroller ADC input divider. Use Value: Draws only 2.0 µA at 8.4 V - extends 220 mAh CR2032 life by >18 months versus higher-leakage alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C11LT1G | 11 V, ±5%, 300 mW, SOT23, ZZT = 30 Ω @ 5 mA | Lower power rating and higher impedance reduce regulation accuracy under load variation | Select when cost sensitivity outweighs regulation stiffness; verify thermal margin at full 20 mA IZ |
| MMBZ5241BS-7-F | Same electrical specs, but in SOT323 (smaller footprint, RθJA = 400 °C/W) | Higher thermal resistance limits usable power in high-ambient environments | Choose only for space-constrained designs where board area savings justify 12% derating at +70°C |
Compared with BZX84-C11LT1G and MMBZ5241BS-7-F, MMBZ5241BQ-7-F delivers superior thermal performance (357 vs. 400 °C/W) and tighter regulation (22 vs. 30 Ω ZZT), making it optimal for thermally demanding or precision-clamping applications requiring sustained 20 mA operation.
Availability
MMBZ5241BQ-7-F is available at Aetrix Electronics and suitable for USB power rail protection, industrial sensor reference, and automotive LIN bus interface requiring stable component supply with traceable sourcing and lifecycle continuity.
Supply support for MMBZ5241BQ-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 device belongs to the MMBZ52xxB series of 350 mW Zener diodes engineered for high-reliability voltage regulation and transient suppression in automotive, industrial, and consumer electronics.
FAQ
What is the maximum continuous Zener current for MMBZ5241BQ-7-F at +70°C ambient?
At +70°C ambient, the device's power derating curve reduces allowable dissipation to 263 mW. With VZ = 11.0 V, this yields a maximum continuous Zener current of 23.9 mA - calculated as PD(TA) / VZ. Exceeding this risks thermal runaway due to positive temperature coefficient above 5 V.
Is MMBZ5241BQ-7-F suitable for automotive under-hood applications?
MMBZ5241BQ-7-F itself is not AEC-Q200 qualified; however, the Q-suffix variant MMBZ5241BQ-7-F is explicitly designated for automotive use. It is manufactured in IATF 16949-certified facilities and meets AEC-Q200 stress requirements including temperature cycling, humidity bias, and mechanical shock.
How does the "Q" in MMBZ5241BQ-7-F differ from standard MMBZ5241B-7-F?
The "Q" suffix denotes automotive qualification: identical electrical specs but produced under IATF 16949, with full PPAP documentation, AEC-Q200 testing, and controlled change management. Standard versions lack these certifications and are intended for commercial/industrial use only.
Can MMBZ5241BQ-7-F replace a 12 V Zener in a 12 V rail clamp circuit?
No - its nominal 11.0 V Zener voltage (10.45–11.55 V range) is intentionally below 12 V to ensure reliable clamping before downstream components reach absolute maximum ratings. Using a true 12 V Zener would delay activation, risking overvoltage damage to 12 V-tolerant ICs.
MMBZ5241BQ-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):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 22 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 8.4 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
MMBZ5241BQ-7-F FAQ
1.How can I place an order for MMBZ5241BQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5241BQ-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 MMBZ5241BQ-7-F reliable?
The price and inventory of MMBZ5241BQ-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 MMBZ5241BQ-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5241BQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5241BQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5241BQ-7-F?
MMBZ5241BQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5241BQ-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 MMBZ5241BQ-7-F?
For technical support, including MMBZ5241BQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5241BQ-7-F requirements.
6.How does Aetrix verify that MMBZ5241BQ-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5241BQ-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 MMBZ5241BQ-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5241BQ-7-F?
All MMBZ5241BQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5241BQ-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 MMBZ5241BQ-7-F part is unused and in its original packaging.
Return procedure for MMBZ5241BQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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