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Diodes Incorporated MMBZ5243BT-7-F
- Part No.:
- MMBZ5243BT-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOT-523
- Datasheet:
-
MMBZ5243BT-7-F.pdf
- Description:
- DIODE ZENER 13V 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:9,308
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Product details
Overview
MMBZ5243BT-7-F from Diodes Incorporated is a 13 V, 150 mW surface-mount Zener diode in SOT-523 package, rated for 9.5 mA test current, 13 Ω dynamic impedance at 9.5 mA, and 0.5 µA reverse leakage at 9.9 V, used for precision voltage reference and overvoltage protection in space-constrained power management circuits.
For engineers reviewing the MMBZ5243BT-7-F datasheet, MMBZ5243BT-7-F pinout, MMBZ5243BT-7-F application, or MMBZ5243BT-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), low thermal resistance (833 °C/W), RoHS-compliant matte tin plating, and suitability for automated SMT assembly on FR-4 PCBs.
Technical Context
This Zener diode employs planar die construction to ensure stable breakdown characteristics and tight voltage distribution across production lots. Its 13 V nominal Zener voltage is specified at 9.5 mA test current with ±5% tolerance (12.35–13.65 V), and it maintains low dynamic impedance (13 Ω) under that bias condition.
The device operates within –65 °C to +150 °C ambient temperature range and derates linearly above 25 °C per the published power derating curve. Reverse leakage remains ≤0.5 µA at VR = 9.9 V, supporting low-power standby regulation and sensing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 13 V - precise clamping/reference level at 9.5 mA, ±5% tolerance ensures predictable circuit behavior |
| Power Dissipation | 150 mW - maximum continuous DC power handling on standard FR-4 board with recommended pad layout |
| Zener Impedance | 13 Ω @ 9.5 mA - low dynamic resistance enables stable regulation under varying load conditions |
| Reverse Leakage Current | ≤0.5 µA @ 9.9 V - minimal quiescent current supports battery-powered and low-power monitoring circuits |
| Thermal Resistance | 833 °C/W - high junction-to-ambient resistance necessitates careful thermal layout in high-density designs |
| Package | SOT-523 - ultra-small 1.6 × 0.8 × 0.5 mm footprint ideal for portable and wearables PCBs |
| RoHS Compliance | Lead-free, halogen-free, green molding compound - meets IPC/JEDEC J-STD-020D Level 1 moisture sensitivity |
Pinout & Package
SOT-523 package: 3-terminal surface-mount case with anode (pin 1), cathode (pin 2), and no third functional terminal; polarity marked by cathode band on top view; terminals solderable per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction path input / Zener reverse-bias reference return | Connected to lower-potential node; forms reference ground return path during Zener operation |
| Cathode (Pin 2) | Zener breakdown voltage output / reverse-bias input | Connected to regulated or clamped node; defines 13 V reference potential relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT-523 footprint | 1.6 × 0.8 mm body size enables placement in <1.0 mm² PCB area, critical for wearables and hearing aids |
| Planar die construction | Ensures repeatable Zener voltage distribution and long-term stability under thermal cycling |
| 150 mW power rating at 25°C | Supports moderate-current shunt regulation without external heat sinking on standard FR-4 |
| Moisture Sensitivity Level 1 | No bake requirement before reflow; compatible with standard SMT assembly lines without dry pack handling |
Applications
| Portable Power Monitoring | USB-C ESD Clamp Reference |
|---|---|
Use Scenario: Monitoring battery voltage in Bluetooth earbuds using resistive divider into ADC. IC Role / Device Role / Timing Role: Provides stable 13 V reference for divider scaling, enabling accurate 3.0–4.2 V battery readout. Use Value: Tight 12.35–13.65 V tolerance ensures <1.5% full-scale error in ADC measurement across temperature. | Use Scenario: Biasing TVS diode array in USB-C receptacle for common-mode surge suppression. IC Role / Device Role / Timing Role: Sets clamping threshold for bidirectional transient protection network. Use Value: Low 0.5 µA leakage avoids loading high-impedance CC line while maintaining fast response to >10 kV ESD events. |
| Industrial Sensor Signal Conditioning | Medical Patch Monitor Voltage Reference |
Use Scenario: Stabilizing excitation voltage for 350 Ω strain gauge bridge in factory-floor load cell. IC Role / Device Role / Timing Role: Shunt regulator establishing fixed 13 V supply for bridge biasing and instrumentation amplifier reference. Use Value: 13 Ω Zener impedance minimizes output variation under 1–2 mA load shifts caused by bridge imbalance. | Use Scenario: Providing reference voltage for analog front-end of disposable ECG patch with 7-day battery life. IC Role / Device Role / Timing Role: Low-leakage Zener reference for rail-to-rail op-amp biasing in ultra-low-power signal chain. Use Value: 0.5 µA max leakage at 9.9 V contributes <0.1% of total system standby current, preserving battery longevity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C13 | 13 V, 300 mW, SOD-523 package, 20 mA test current, 20 Ω ZZT, 0.1 µA IR @ 10.4 V | Higher power rating allows higher current regulation but larger 1.3 × 0.8 mm footprint | Select when >150 mW dissipation or tighter 0.1 µA leakage is required; not drop-in due to different marking and thermal profile |
| MMBZ5243BS-7-F | Identical electrical specs, same SOT-523 package, but with alternate marking (KH3) and tape/reel packaging variant | No functional difference; differs only in reel orientation and date-code marking format | Direct form-fit-function replacement; use when sourcing logistics require alternate reel configuration |
Compared with BZX584C13 and MMBZ5243BS-7-F, the MMBZ5243BT-7-F offers optimal balance of ultra-compact size, industry-standard marking (KH3), and proven reliability in high-volume portable designs-making it preferred where board area is constrained and legacy compatibility matters.
Availability
MMBZ5243BT-7-F is available at Aetrix Electronics and suitable for portable power monitoring, USB-C ESD clamp reference, and industrial sensor signal conditioning requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing traceability.
Supply support for MMBZ5243BT-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.
The MMBZ52xxBT series belongs to Diodes' general-purpose Zener diode product line, engineered specifically for high-reliability, low-cost voltage regulation and protection in consumer, computing, and industrial surface-mount applications.
FAQ
What is the maximum continuous Zener current for MMBZ5243BT-7-F at 70°C ambient?
At 70°C ambient, the device's power derating curve reduces its maximum allowable dissipation to approximately 112 mW. With a nominal Zener voltage of 13 V, this corresponds to a maximum continuous Zener current of ~8.6 mA - calculated as 112 mW ÷ 13 V, assuming negligible forward drop and stable thermal resistance.
Does MMBZ5243BT-7-F support reflow soldering per JEDEC J-STD-020?
Yes - the SOT-523 package is rated Moisture Sensitivity Level 1 per J-STD-020D, meaning it may be stored indefinitely at ≤30°C/60% RH and subjected to standard lead-free reflow profiles (peak 260°C) without baking or special handling.
How does the 13 Ω Zener impedance affect regulation accuracy under load variation?
A 13 Ω dynamic impedance means a 1 mA change in Zener current causes ~13 mV shift in output voltage. In a 13 V reference application with ±1 mA load variation, this results in ±13 mV (±0.1%) regulation error - acceptable for non-precision analog interfaces but insufficient for 12-bit+ ADC references without post-regulation filtering.
Can MMBZ5243BT-7-F be used in place of a 12 V Zener for overvoltage protection?
No - its nominal 13 V Zener voltage and 12.35–13.65 V tolerance range do not overlap with typical 12 V Zener specifications (e.g., 11.4–12.6 V). Substituting it risks inadequate clamping during 12 V rail transients or premature conduction during normal operation.
MMBZ5243BT-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 13 V
- Tolerance:
- ±5%
- Power - Max:
- 150 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-523
MMBZ5243BT-7-F FAQ
1.How can I place an order for MMBZ5243BT-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5243BT-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 MMBZ5243BT-7-F reliable?
The price and inventory of MMBZ5243BT-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 MMBZ5243BT-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5243BT-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5243BT-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5243BT-7-F?
MMBZ5243BT-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5243BT-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 MMBZ5243BT-7-F?
For technical support, including MMBZ5243BT-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5243BT-7-F requirements.
6.How does Aetrix verify that MMBZ5243BT-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5243BT-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 MMBZ5243BT-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5243BT-7-F?
All MMBZ5243BT-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5243BT-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 MMBZ5243BT-7-F part is unused and in its original packaging.
Return procedure for MMBZ5243BT-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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