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Diodes Incorporated MMBZ5245BQ-7-F
- Part No.:
- MMBZ5245BQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5245BQ-7-F.pdf
- Description:
- DIODE ZENER 15V 350MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
MMBZ5245BQ-7-F from Diodes Incorporated is a 15 V, 350 mW surface-mount Zener diode in SOT23 package, rated for 8.5 mA test current with 16 Ω dynamic impedance at 1 kHz and ≤0.1 µA reverse leakage at 11 V, used for precision voltage regulation and overvoltage protection in low-power analog and digital supply rails.
For engineers reviewing the MMBZ5245BQ-7-F datasheet, MMBZ5245BQ-7-F pinout, MMBZ5245BQ-7-F application, or MMBZ5245BQ-7-F equivalent, key selection criteria include Zener voltage tolerance (±5% at 15 V), thermal resistance (357 °C/W on FR-4), JEDEC-compliant reliability, and automotive-grade qualification readiness via Q-suffix variants.
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 its 14.25–15.75 V nominal range.
Designed for automated SMT assembly, it delivers 350 mW power dissipation on standard FR-4 PCBs with defined pad layout and meets J-STD-020 Level 1 moisture sensitivity. Terminal plating uses matte tin over Alloy 42 leadframe for reliable solderability per MIL-STD-202.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V nominal, 14.25–15.75 V range at 8.5 mA - defines regulated output voltage tolerance for reference circuits |
| Power Dissipation (PD) | 350 mW on FR-4 PCB - sets maximum continuous power handling without derating below 25°C ambient |
| Zener Impedance (ZZT) | 16 Ω at 1 kHz, 8.5 mA - determines AC regulation stability and ripple rejection capability |
| Reverse Leakage (IR) | ≤0.1 µA at 11 V - ensures minimal quiescent current draw in standby or high-impedance bias networks |
| Thermal Resistance (RθJA) | 357 °C/W - quantifies junction-to-ambient heat transfer efficiency on standard PCB layout |
| Operating Temperature | −65 to +150 °C - supports industrial and extended-temperature embedded applications |
Pinout & Package
Package: SOT23 - three-terminal surface-mount plastic package with 0.915 mm lead pitch, 2.90 mm body length, and 1.30 mm width; RoHS-compliant green molding compound (UL 94V-0).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration; enables current sourcing into load |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher-potential node; establishes regulated voltage drop when reverse biased above VZ |
| No-Connect (Pin 3) | Internal die attach flag | Electrically isolated; serves mechanical anchoring function only - must remain unconnected in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight VZ distribution and repeatable Zener knee characteristics across production lots |
| 350 mW FR-4 power rating | Enables direct integration into space-constrained 3.3 V/5 V rail clamping without external heatsinking |
| JEDEC High Reliability qualification | Validates long-term parametric stability under thermal cycling and humidity exposure per AEC-Q standards |
| Lead-free & halogen-free | Meets RoHS 3 (2015/863/EU) and automotive "Green" requirements (<900 ppm Br+Cl, <1000 ppm Sb) |
Applications
| Microcontroller I/O Protection | Low-Power Sensor Reference |
|---|---|
Use Scenario: Clamping 3.3 V GPIO lines against ESD transients and supply overvoltage events in portable IoT nodes. IC Role / Device Role / Timing Role: Zener acts as shunt regulator and transient voltage suppressor at microcontroller input pins. Use Value: Limits voltage excursion to ≤15 V during 8 kV HBM ESD events while drawing <1 µA leakage in normal operation. |
Use Scenario: Providing stable 15 V bias for op-amp-based bridge sensor signal conditioning in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Functions as precision voltage reference source for excitation circuitry. Use Value: Maintains ±5% regulation over −40 to +85°C, enabling <0.1% full-scale error in 24-bit ADC systems. |
| USB-C Power Negotiation Clamp | Industrial PLC Input Conditioning |
Use Scenario: Protecting CC line interface ICs from voltage overshoot during USB PD contract negotiation bursts. IC Role / Device Role / Timing Role: Fast-acting clamp limiting CC line voltage to safe levels during 20 V negotiation phases. Use Value: Responds within nanoseconds to 15 V transients, preventing latch-up in USB-C controller ICs. |
Use Scenario: Regulating 24 V DC field input signals down to 15 V for isolation amplifier front-ends in factory automation modules. IC Role / Device Role / Timing Role: Serves as primary voltage reduction element before optocoupler or digital isolator stage. Use Value: Handles continuous 10 mA load current with <10 mV ripple, supporting 10 kHz analog input bandwidth. |
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 ±5%, 300 mW, 20 mA IZT, 30 Ω ZZT | Higher Zener impedance reduces AC regulation accuracy in precision references | Preferred for cost-sensitive consumer applications where 30 Ω impedance is acceptable |
| MMBZ5245BS-7-F | Identical electrical specs; SOT-23 variant with different internal marking and traceability | No functional difference; differs only in manufacturing site (Shanghai vs. Chengdu) and date code format | Select when requiring specific regional supply chain alignment or dual-source procurement |
Compared with BZX84-C15LT1G and MMBZ5245BS-7-F, MMBZ5245BQ-7-F offers superior 16 Ω Zener impedance for tighter voltage regulation and is qualified for automotive change control processes, making it suitable for safety-critical industrial sensing where parameter stability is mandatory.
Availability
MMBZ5245BQ-7-F is available at Aetrix Electronics and suitable for microcontroller I/O protection, low-power sensor reference, and industrial PLC input conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MMBZ5245BQ-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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with design and manufacturing facilities certified to IATF 16949 and ISO 9001 standards.
This device belongs to the MMBZ52xxB series of 350 mW Zener diodes engineered for high-reliability voltage regulation in automotive, industrial, and communications infrastructure applications where JEDEC-compliant robustness is required.
FAQ
What is the maximum steady-state power dissipation for MMBZ5245BQ-7-F on a standard FR-4 PCB?
The device is rated for 350 mW continuous power dissipation when mounted on FR-4 with the recommended pad layout per Diodes' package outline documentation. Derating begins linearly above +25°C ambient, reaching zero dissipation at +150°C per the published power derating curve (Figure 1).
Does MMBZ5245BQ-7-F meet automotive qualification requirements?
MMBZ5245BQ-7-F itself is not AEC-Q200 qualified, but Diodes offers Q-suffix automotive-grade equivalents (e.g., MMBZ5245BQ-7-FQ) manufactured in IATF 16949-certified facilities and PPAP-capable. The base part shares identical die and process flow with those qualified variants.
How does the 16 Ω Zener impedance affect circuit performance?
A 16 Ω dynamic impedance means that for every 1 mA change in Zener current, the output voltage shifts by approximately 16 mV. This directly impacts regulation accuracy under varying load conditions and determines ripple rejection in filtered reference supplies.
Can MMBZ5245BQ-7-F be used in place of a 1N4744A in through-hole designs?
No - while both are 15 V Zeners, MMBZ5245BQ-7-F is a 350 mW SOT23 surface-mount device with different thermal characteristics, current ratings (8.5 mA vs. 17 mA), and impedance (16 Ω vs. 14 Ω). Direct substitution requires PCB redesign and validation of power handling and transient response.
MMBZ5245BQ-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):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 16 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 11 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
MMBZ5245BQ-7-F FAQ
1.How can I place an order for MMBZ5245BQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5245BQ-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 MMBZ5245BQ-7-F reliable?
The price and inventory of MMBZ5245BQ-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 MMBZ5245BQ-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5245BQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5245BQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5245BQ-7-F?
MMBZ5245BQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5245BQ-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 MMBZ5245BQ-7-F?
For technical support, including MMBZ5245BQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5245BQ-7-F requirements.
6.How does Aetrix verify that MMBZ5245BQ-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5245BQ-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 MMBZ5245BQ-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5245BQ-7-F?
All MMBZ5245BQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5245BQ-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 MMBZ5245BQ-7-F part is unused and in its original packaging.
Return procedure for MMBZ5245BQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5245BQ-7-F Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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