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Diodes Incorporated MMBZ5243BW-7
- Part No.:
- MMBZ5243BW-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
MMBZ5243BW-7.pdf
- Description:
- DIODE ZENER 13V 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:9,304
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Product details
Overview
MMBZ5243BW-7 from Diodes Incorporated is a 13 V, 200 mW surface-mount Zener diode in SOT323 package, rated for ±5% tolerance (12.35–13.65 V), with 9.5 mA test current, 13 Ω dynamic impedance at 9.5 mA, and 0.5 μA reverse leakage at 9.9 V. It provides precision voltage regulation in low-power biasing and reference circuits for automotive ECUs and industrial sensor interfaces.
For engineers reviewing the MMBZ5243BW-7 datasheet, MMBZ5243BW-7 pinout, MMBZ5243BW-7 application, or MMBZ5243BW-7 equivalent, key selection criteria include Zener voltage accuracy, low leakage at rated VR, thermal resistance (625 °C/W), AEC-Q101 qualification, and SOT323 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its 13 V nominal Zener voltage is specified at 9.5 mA test current, with dynamic impedance of 13 Ω measured at 1 kHz, ensuring predictable regulation performance in feedback networks.
The device is constructed using planar epitaxial technology, housed in a halogen- and antimony-free "Green" molded plastic SOT323 case rated UL 94V-0, and qualified to AEC-Q101 for automotive-grade reliability across –65 °C to +150 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 13 V (12.35–13.65 V range at 9.5 mA - defines regulation setpoint for voltage reference design) |
| Power Dissipation | 200 mW (maximum continuous power at 25 °C ambient - limits usable current in linear regulator shunt paths) |
| Zener Impedance | 13 Ω @ 9.5 mA (low dynamic resistance ensures minimal output voltage variation under load transients) |
| Reverse Leakage Current | 0.5 μA @ 9.9 V (ultra-low leakage preserves accuracy in high-impedance bias networks) |
| Thermal Resistance | 625 °C/W (junction-to-ambient - determines temperature rise per mW dissipated on FR4 board) |
| Operating Temperature | –65 °C to +150 °C (AEC-Q101 qualified - supports under-hood and industrial control environments) |
Pinout & Package
Package: SOT323 - 3-terminal surface-mount plastic package with gull-wing leads, 0.006 g mass, moisture sensitivity level 1, matte tin-plated Alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reverse-biased cathode connection point | Connected to lower-potential node in shunt regulator; polarity must match schematic symbol orientation |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to regulated voltage rail; carries full Zener current during regulation |
| NC / Heat Sink Pad (Pin 3) | Non-connected internal die attach pad | Not electrically connected; may be grounded for thermal relief but must remain floating per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control modules and body controllers |
| Halogen- and antimony-free "Green" compound | Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - compliant with strict environmental manufacturing standards |
| SOT323 footprint | Enables automated placement and reflow soldering on high-density PCBs without lead bending or alignment issues |
| Low 0.5 μA leakage at 9.9 V | Minimizes error in precision voltage references and high-impedance sensor biasing circuits |
Applications
| Automotive Sensor Biasing | Industrial Analog Front-End Reference |
|---|---|
Use Scenario: Providing stable bias voltage to analog sensors (e.g., pressure, temperature) in engine control units. IC Role / Device Role / Timing Role: Shunt voltage reference maintaining fixed 13 V supply for sensor excitation and ADC reference scaling. Use Value: Tight 5% Zener tolerance and low 0.5 μA leakage ensure <0.1% reference drift over temperature and lifetime. | Use Scenario: Setting precise threshold in programmable logic controller (PLC) input conditioning circuits. IC Role / Device Role / Timing Role: Overvoltage clamp and reference node stabilizer for 12–24 V industrial I/O protection stages. Use Value: 13 V nominal rating aligns with common 12 V system rails; 625 °C/W RθJA enables reliable operation without heatsinking. |
| USB-C Power Delivery Monitoring | Medical Diagnostic Instrument Calibration |
Use Scenario: Voltage monitoring node in USB-C PD source negotiation circuitry for VBUS validation. IC Role / Device Role / Timing Role: Precision Zener reference for comparator trip-point setting in fault-detection comparators. Use Value: 13 Ω Zener impedance ensures fast response to VBUS overvoltage events without reference droop. | Use Scenario: Calibration voltage source in portable ECG/EEG signal chain front-end modules. IC Role / Device Role / Timing Role: Low-drift DC reference for DAC output buffering and gain-setting resistors. Use Value: AEC-Q101 qualification correlates with long-term stability requirements; 0.006 g mass supports ultra-lightweight handheld form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C13-7-F | Same 13 V nominal, 5% tolerance, but 350 mW power rating and SOT23 package | Higher power handling allows >15 mA continuous operation; larger footprint requires layout revision | Select when higher current capability or legacy SOT23 compatibility is required |
| MMBZ5243BS-7-F | Identical electrical specs but SOT363 dual-diode variant with shared cathode | Enables dual-rail clamping or matched reference pairs; adds second anode terminal | Select when space-constrained designs require two matched 13 V Zeners in one footprint |
Compared with BZX84-C13-7-F and MMBZ5243BS-7-F, MMBZ5243BW-7 offers optimal balance of AEC-Q101 compliance, SOT323 miniaturization, and ultra-low leakage - making it preferred for new automotive and portable medical designs where footprint and reliability are prioritized over raw power headroom.
Availability
MMBZ5243BW-7 is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog front-end references, and USB-C power delivery monitoring requiring stable component supply and AEC-Q101 traceability.
Supply support for MMBZ5243BW-7 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 and manufacturing operations across Asia and the Americas.
The MMBZ52xxBW series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for precision voltage reference and overvoltage protection in harsh-environment electronics.
FAQ
What is the maximum reverse voltage (VR) at which MMBZ5243BW-7 guarantees ≤0.5 μA leakage?
The datasheet specifies 0.5 μA maximum reverse leakage current at VR = 9.9 V. This value is measured under standard test conditions (TA = +25 °C) and defines the upper bound of leakage before entering significant breakdown conduction - critical for high-impedance reference node integrity.
Can MMBZ5243BW-7 be used in place of a 12 V Zener diode in a voltage clamp circuit?
No - MMBZ5243BW-7 is a 13 V Zener (12.35–13.65 V range). Substituting it for a 12 V part would raise the clamping threshold by ~1 V, potentially allowing damaging overvoltage to reach downstream components. Use MMBZ5242BW-7 (12 V) instead for exact replacement.
Is the SOT323 package of MMBZ5243BW-7 compatible with standard reflow profiles for lead-free soldering?
Yes - the device is fully RoHS-compliant with matte tin plating and qualified for lead-free reflow per J-STD-020D Level 1 moisture sensitivity. Standard IPC/JEDEC J-STD-020 Class 3 peak profile (260 °C max) is supported without degradation.
Does MMBZ5243BW-7 have a specified capacitance value for high-frequency noise filtering applications?
No - the datasheet does not list junction capacitance (CJ) for MMBZ5243BW-7. While Figure 4 shows typical total capacitance vs. Zener voltage (≈15 pF at 13 V), this is extrapolated from adjacent parts and not guaranteed. For noise filtering, use a dedicated RF capacitor or TVS diode with published Cj.
MMBZ5243BW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 13 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 13 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 9.9 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-323
MMBZ5243BW-7 FAQ
1.How can I place an order for MMBZ5243BW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5243BW-7 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 MMBZ5243BW-7 reliable?
The price and inventory of MMBZ5243BW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5243BW-7 is usually 5 days.
3.What payment methods are accepted for MMBZ5243BW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5243BW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5243BW-7?
MMBZ5243BW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5243BW-7 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 MMBZ5243BW-7?
For technical support, including MMBZ5243BW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5243BW-7 requirements.
6.How does Aetrix verify that MMBZ5243BW-7 is sourced from the original manufacturer or authorized distributors?
All MMBZ5243BW-7 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 MMBZ5243BW-7 meets industry standards.
7.What is the process for return or replacement of MMBZ5243BW-7?
All MMBZ5243BW-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5243BW-7, 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 MMBZ5243BW-7 part is unused and in its original packaging.
Return procedure for MMBZ5243BW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5243BW-7 Tags
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