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Diodes Incorporated MMBZ5239BW-7-F
- Part No.:
- MMBZ5239BW-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5239BW-7-F.pdf
- Description:
- DIODE ZENER 9.1V 200MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:6,773
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Product details
Overview
MMBZ5239BW-7-F from Diodes Incorporated is a 9.1 V, 200 mW surface-mount Zener diode in SOT323 package, rated for ±5% zener voltage tolerance at 20 mA test current, with 10 Ω dynamic impedance and 3 μA reverse leakage at 7.0 V, used for precision voltage regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the MMBZ5239BW-7-F datasheet, MMBZ5239BW-7-F pinout, MMBZ5239BW-7-F application, or MMBZ5239BW-7-F equivalent, key selection criteria include zener voltage accuracy, thermal resistance (625 °C/W), AEC-Q101 qualification, lead-free "Green" compliance, and SOT323 footprint compatibility with automated assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and temperature conditions. It features a nominal 9.1 V zener voltage with tight 8.65–9.56 V range at 20 mA, and exhibits low dynamic impedance (10 Ω at 1 kHz) to minimize output voltage variation during transient current changes.
Designed for high-reliability applications, it meets AEC-Q101 stress testing requirements and uses halogen/antimony-free molding compound (UL 94V-0). Its 0.006 g weight and moisture sensitivity level 1 rating support robust reflow soldering in automotive and industrial PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal, 8.65–9.56 V range at 20 mA - ensures stable reference within ±5% tolerance for feedback loops and voltage clamping. |
| Power Dissipation (PD) | 200 mW at 25°C - limits continuous power handling; derates linearly above 25°C per Fig. 1 curve. |
| Zener Impedance (ZZT) | 10 Ω at 20 mA, 1 kHz - enables low AC voltage deviation during small-signal regulation. |
| Reverse Leakage (IR) | 3.0 μA max at 7.0 V - guarantees minimal standby current in bias networks and sensing circuits. |
| Thermal Resistance (RθJA) | 625 °C/W on FR4 board - defines junction-to-ambient temperature rise per watt dissipated. |
| Package | SOT323 - 3-pin surface-mount outline with 2.10 mm body width, compatible with standard pick-and-place equipment. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
Package: SOT323 - ultra-small plastic surface-mount case with matte tin-plated Alloy 42 leads, 0.006 g mass, UL 94V-0 flammability rating, and moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground path | Connected to circuit ground or lower-potential node when used in reverse-biased regulation configuration. |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Provides stable 9.1 V reference relative to anode; connects to feedback point or clamp rail. |
| No-connect (Pin 3) | Internal die attach flag / mechanical support | Not electrically connected; serves as heatsink tab and mechanical anchor-must not be biased or loaded. |
Key Features
| Feature | Design Value |
|---|---|
| Automated assembly compatibility | SOT323 footprint and lead finish meet MIL-STD-202 solderability requirements for high-yield reflow. |
| AEC-Q101 qualification | Validated for automotive underhood environments including -65°C to +150°C operation and humidity exposure. |
| Halogen- and antimony-free "Green" construction | Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb thresholds-compliant with EU RoHS 2 and JESD22-A112. |
| Low thermal resistance design | 625 °C/W on standard FR4 layout enables 200 mW operation without external heatsinking. |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module (BCM) Voltage Reference |
|---|---|
Use Scenario: Stabilizing ADC reference voltage in 4–20 mA loop transmitters operating across -40°C to +85°C ambient. IC Role / Device Role / Timing Role: Zener diode provides precise 9.1 V shunt reference for op-amp biasing and DAC output scaling. Use Value: ±5% voltage tolerance and 10 Ω impedance ensure <0.5% full-scale error drift over temperature and load. | Use Scenario: Clamping microcontroller I/O rail against load-dump transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Acts as fast-acting overvoltage protector on LIN bus interface lines. Use Value: 3 μA leakage at 7 V minimizes quiescent current; AEC-Q101 rating ensures field reliability. |
| Consumer Power Adapter Feedback Network | Medical Portable Device Battery Monitoring |
Use Scenario: Setting secondary-side feedback threshold in isolated flyback converters for USB-C PD adapters. IC Role / Device Role / Timing Role: Zener establishes optocoupler LED turn-on voltage to regulate output voltage via primary-side controller. Use Value: Tight 8.65–9.56 V range maintains ±1.5% output regulation across line/load variations. | Use Scenario: Providing reference voltage for fuel gauge ICs monitoring Li-ion cell voltage in handheld diagnostics tools. IC Role / Device Role / Timing Role: Supplies stable 9.1 V reference to ADC input stage for accurate battery state-of-charge calculation. Use Value: Low 3 μA leakage preserves battery life; SOT323 size fits space-constrained PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B9V1,115 (Nexperia) | Same 9.1 V nominal, ±5% tolerance, but 300 mW PD and SOD323 package (slightly larger footprint). | Higher power rating supports higher surge currents; less suitable for ultra-dense layouts requiring SOT323. | Select when >200 mW dissipation margin is needed or when Nexperia supply chain preference applies. |
| 1SMA5920BT3G (onsemi) | 9.1 V nominal, ±5%, but DO-214AC (SMA) package - 5.3 mm × 2.6 mm vs. SOT323's 2.2 mm × 1.3 mm. | Higher thermal mass improves surge handling (Fig. 6 shows 40 W peak), but incompatible with fine-pitch SMT lines. | Choose for high-energy transient suppression where board space allows larger package. |
Compared with BZX384-B9V1,115 and 1SMA5920BT3G, MMBZ5239BW-7-F offers optimal balance of miniaturization (SOT323), AEC-Q101 qualification, and strict 10 Ω impedance-making it preferred for space-constrained automotive and portable electronics where precision and reliability are co-prioritized.
Availability
MMBZ5239BW-7-F is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive body control modules, and consumer power adapter feedback networks requiring stable component supply and long-term lifecycle assurance.
Supply support for MMBZ5239BW-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 centers across Asia and manufacturing in Taiwan, China, and the U.S.
This device belongs to the MMBZ52xxBW series of 200 mW Zener diodes engineered specifically for high-volume, high-reliability surface-mount applications in automotive, industrial, and consumer electronics where space, consistency, and regulatory compliance are critical.
FAQ
What is the maximum reverse voltage (VR) that MMBZ5239BW-7-F can withstand before breakdown?
The device exhibits a nominal zener voltage of 9.1 V at 20 mA test current, with guaranteed breakdown occurring between 8.65 V and 9.56 V. Below 7.0 V, reverse leakage remains ≤3.0 μA - confirming reliable blocking behavior up to its rated VR of 7.0 V per the Electrical Characteristics table.
Is MMBZ5239BW-7-F suitable for use in automotive under-hood applications?
Yes - it is fully qualified to AEC-Q101 standards, including temperature cycling (-65°C to +150°C), high-temperature reverse bias, and mechanical shock testing. Its halogen-free "Green" compound and matte tin plating also meet automotive chemical compliance requirements.
How does the SOT323 package affect thermal performance compared to larger Zener packages?
With RθJA = 625 °C/W on FR4, the SOT323 limits continuous power to 200 mW at 25°C ambient. This is lower than SMA or DO-35 packages, but sufficient for low-power reference and clamping roles where board area is constrained and heat generation is minimal.
Can MMBZ5239BW-7-F replace older through-hole Zeners like 1N4739A in new designs?
It provides equivalent 9.1 V regulation but in SOT323 surface-mount format - not a direct pin-for-pin replacement due to different footprint and thermal characteristics. Layout redesign and thermal validation are required, though electrical behavior matches closely within specified test conditions.
MMBZ5239BW-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):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 7 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
MMBZ5239BW-7-F FAQ
1.How can I place an order for MMBZ5239BW-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5239BW-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 MMBZ5239BW-7-F reliable?
The price and inventory of MMBZ5239BW-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 MMBZ5239BW-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5239BW-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5239BW-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5239BW-7-F?
MMBZ5239BW-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5239BW-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 MMBZ5239BW-7-F?
For technical support, including MMBZ5239BW-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5239BW-7-F requirements.
6.How does Aetrix verify that MMBZ5239BW-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5239BW-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 MMBZ5239BW-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5239BW-7-F?
All MMBZ5239BW-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5239BW-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 MMBZ5239BW-7-F part is unused and in its original packaging.
Return procedure for MMBZ5239BW-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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