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Diodes Incorporated MMBZ5244B-7-F
- Part No.:
- MMBZ5244B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5244B-7-F.pdf
- Description:
- DIODE ZENER 14V 350MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,382
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Product details
Overview
MMBZ5244B-7-F from Diodes Incorporated is a 14 V, 350 mW surface-mount Zener diode in SOT23 package, rated for 9.0 mA test current with 15 Ω dynamic impedance at 1 kHz and 0.1 µA reverse leakage at 10 V. It provides precision voltage regulation in low-power analog reference and overvoltage protection circuits on FR-4 PCBs.
For engineers reviewing the MMBZ5244B-7-F datasheet, MMBZ5244B-7-F pinout, MMBZ5244B-7-F application, or MMBZ5244B-7-F equivalent, this part is selected for stable 14 V clamping in space-constrained DC bias networks, ESD-tolerant sensor interfaces, and automotive-grade power rail supervision where JEDEC-compliant reliability and RoHS/Green compliance are required.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled nominal voltage (13.3–14.7 V), specified at IZT = 9.0 mA. Its 15 Ω Zener impedance at 1 kHz ensures minimal voltage deviation under small-signal AC load variations.
The device exhibits ultra-low reverse leakage (≤0.1 µA at VR = 10 V) and thermal resistance of 357 °C/W on FR-4, enabling predictable derating up to +150 °C ambient per Figure 1 in DS18011 Rev. 26-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.0 V nominal, 13.3–14.7 V range at 9.0 mA - defines precise clamping threshold for 12–15 V rail monitoring |
| Power Dissipation (PD) | 350 mW on FR-4 PCB - supports continuous regulation in low-current bias networks without heatsinking |
| Zener Impedance (ZZT) | 15 Ω at 1 kHz, 9.0 mA - ensures <±15 mV output shift under ±150 µA AC load perturbation |
| Reverse Leakage (IR) | ≤0.1 µA at VR = 10 V - prevents measurable current draw in high-impedance voltage divider references |
| Thermal Resistance (RθJA) | 357 °C/W - enables operation up to +150 °C ambient when mounted per recommended pad layout |
| Package | SOT23 - 3-pin surface-mount footprint (2.9 × 1.3 × 1.0 mm) compatible with automated reflow assembly |
Pinout & Package
MMBZ5244B-7-F uses the standard SOT23 package with three terminals: Anode (Pin 1), Cathode (Pin 2), and unused (Pin 3). The cathode is marked by a band on the top surface; Pin 3 is internally unconnected and electrically isolated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node in reverse-biased configuration; must be held ≤10 V below cathode for regulation |
| Pin 2 | Cathode | Connected to regulated voltage node; carries full Zener current during clamping; marked by band |
| Pin 3 | NC (No Connect) | Internally unconnected; no electrical function; must remain floating or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables tight VZ tolerance (±5%) and stable long-term voltage drift under thermal cycling |
| 350 mW dissipation on FR-4 | Eliminates need for external heat spreading in 0.1–1 mA bias applications like op-amp reference dividers |
| Matte tin finish on Alloy 42 leadframe | Ensures reliable solder wetting and intermetallic formation in Pb-free reflow profiles (J-STD-020 Level 1) |
| Halogen- and antimony-free "Green" compound | Meets IPC-1752A reporting requirements with Br+Cl ≤1500 ppm and Sb ≤1000 ppm |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Voltage reference for LIN bus transceiver biasing in door module ECUs. IC Role / Device Role / Timing Role: Zener diode providing stable 14 V rail clamp against battery transients up to ±100 V. Use Value: Maintains transceiver VCC within 13.3–14.7 V window during load-dump events, preventing latch-up. |
Use Scenario: Precision bias network for 4–20 mA current-loop transmitter using rail-to-rail op-amps. IC Role / Device Role / Timing Role: Shunt regulator establishing 14 V reference for DAC output stage and current-sense amplifier. Use Value: Delivers <0.1 µA leakage-induced error in 1 MΩ feedback networks, preserving 12-bit linearity. |
| Consumer IoT Power Management | Medical Diagnostic Equipment |
|
Use Scenario: Overvoltage protection for USB-C PD negotiation IC powered from 12 V adapter. IC Role / Device Role / Timing Role: Clamping diode limiting VIN to 14.7 V during adapter surge events. Use Value: Absorbs 350 mW transient energy without parametric shift, verified per AEC-Q200 stress profiles. |
Use Scenario: Reference stabilization in portable ECG front-end ADC driver stage. IC Role / Device Role / Timing Role: Low-noise shunt regulator supplying clean 14 V to instrumentation amplifier bias rails. Use Value: 15 Ω ZZT minimizes 1/f noise coupling into µV-level biopotential signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C15-7-F | 15 V nominal (14.3–15.8 V), 300 mW PD, 30 Ω ZZT at 5 mA | Higher VZ tolerance and impedance reduce accuracy in 14 V-critical rails | Select only if system tolerates +1 V clamping offset and higher dynamic error |
| MMBZ5245B-7-F | 15 V nominal (14.25–15.75 V), identical package, 16 Ω ZZT, 0.1 µA IR | 1 V higher regulation point shifts bias point in fixed-resistor divider networks | Use when circuit requires exact 15 V reference; verify resistor recalibration for 14 V target |
Compared with BZX84-C15-7-F and MMBZ5245B-7-F, MMBZ5244B-7-F delivers tighter 14 V regulation with lower impedance and matched thermal performance, making it optimal for designs where 14.0 V ±0.7 V is mandatory and leakage must stay below 0.1 µA.
Availability
MMBZ5244B-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and consumer IoT power management requiring stable component supply across production lifecycles.
Supply support for MMBZ5244B-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 integrated circuits, specializing in high-reliability components for automotive, industrial, and computing markets.
This part belongs to the MMBZ52xxB series of 350 mW Zener diodes designed for precision voltage reference and overvoltage protection in space-constrained, high-volume surface-mount applications.
FAQ
What is the maximum steady-state power dissipation for MMBZ5244B-7-F on FR-4?
The device is rated for 350 mW continuous power dissipation when mounted on FR-4 PCB with Diodes' recommended pad layout (Document DS18011, Note 6). Derating begins linearly above +25°C ambient, reaching zero dissipation at +150°C per Figure 1.
Does MMBZ5244B-7-F meet automotive qualification standards?
MMBZ5244B-7-F is qualified to JEDEC reliability standards referenced in AEC-Q but is not an AEC-Q200-qualified automotive grade part. For automotive applications, Diodes offers Q-suffix variants (e.g., MMBZ5244BQ-7-F) manufactured in IATF 16949-certified facilities.
How is the cathode identified on the SOT23 package?
The cathode is marked by a visible band on the top surface of the SOT23 package, aligned with Pin 2. Pin 1 is the anode, located adjacent to the band; Pin 3 is unconnected and positioned opposite the band end.
What is the typical Zener impedance at low current (<1 mA)?
At IZ = 0.25 mA, the dynamic impedance (ZZK) is 600 Ω (per Electrical Characteristics Table, DS18011 p.3). This value reflects higher impedance in the knee region, critical for low-current reference stability analysis.
MMBZ5244B-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):
- 14 V
- Tolerance:
- ±5%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 10 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
MMBZ5244B-7-F FAQ
1.How can I place an order for MMBZ5244B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5244B-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 MMBZ5244B-7-F reliable?
The price and inventory of MMBZ5244B-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 MMBZ5244B-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5244B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5244B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5244B-7-F?
MMBZ5244B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5244B-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 MMBZ5244B-7-F?
For technical support, including MMBZ5244B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5244B-7-F requirements.
6.How does Aetrix verify that MMBZ5244B-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5244B-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 MMBZ5244B-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5244B-7-F?
All MMBZ5244B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5244B-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 MMBZ5244B-7-F part is unused and in its original packaging.
Return procedure for MMBZ5244B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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