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Diodes Incorporated MMBZ5237BT-7-F
- Part No.:
- MMBZ5237BT-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOT-523
- Datasheet:
-
MMBZ5237BT-7-F.pdf
- Description:
- DIODE ZENER 8.2V 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:8,151
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Product details
Overview
MMBZ5237BT-7-F from Diodes Incorporated is a 8.2 V, 150 mW surface-mount Zener diode in SOT-523 package, rated for 20 mA test current, 8.0 Ω dynamic impedance at 1 kHz, and 3.0 μA reverse leakage at 6.5 V, used for precision voltage regulation and reference in space-constrained power management circuits.
For engineers reviewing the MMBZ5237BT-7-F datasheet, MMBZ5237BT-7-F pinout, MMBZ5237BT-7-F application, or MMBZ5237BT-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (833 °C/W), low capacitance (~15 pF), RoHS-compliant matte tin plating, and suitability for automated SMT assembly on FR-4 boards.
Technical Context
This Zener diode employs planar die construction to ensure stable breakdown characteristics and low temperature coefficient. It operates within -65 °C to +150 °C and maintains specified Zener voltage across 0.25–20 mA current range with defined impedance at both knee (ZZK) and test (ZZT) conditions.
Its ultra-small SOT-523 package supports high-density PCB layouts while meeting JEDEC moisture sensitivity Level 1 and MIL-STD-202 solderability requirements. The device is lead-free, halogen-free (Green compound, Date Code UO+), and optimized for stable DC voltage clamping and reference generation in low-power analog subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.2 V nominal, 7.79–8.61 V min/max at 20 mA - defines regulated output voltage tolerance band |
| Power Dissipation (PD) | 150 mW at TA = 25 °C - sets maximum continuous DC power handling on standard FR-4 layout |
| Zener Impedance (ZZT) | 8.0 Ω at IZT = 20 mA, f = 1 kHz - determines AC regulation stability under varying load |
| Reverse Leakage (IR) | 3.0 μA max at VR = 6.5 V - ensures minimal quiescent current in standby voltage-reference circuits |
| Thermal Resistance (RθJA) | 833 °C/W - indicates junction-to-ambient heat transfer efficiency on recommended pad layout |
| Capacitance (CT) | ~15 pF at VR = 0 V - limits high-frequency noise coupling in signal-path references |
Pinout & Package
Package: SOT-523 - ultra-compact 3-terminal surface-mount plastic case (1.60 mm × 0.80 mm × 0.50 mm), UL 94V-0 rated, moisture sensitivity Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / cathode reference ground node | Connected to circuit ground when used in reverse-biased Zener mode; polarity marked on top view |
| Cathode | Zener breakdown terminal / voltage reference output | Provides stable 8.2 V reference when reverse-biased; marked with bar or "K" code on package |
| Case / Not connected | Non-electrical mechanical termination | SOT-523 has no internal connection to case; serves only as thermal and mechanical anchor |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT-523 footprint | Enables placement in <1.0 mm² board area, supporting miniaturized portable and wearable electronics |
| Planar die construction | Delivers repeatable Zener voltage distribution and improved long-term stability vs. diffused-junction alternatives |
| Lead-free & Green compound | Meets RoHS Directive 2011/65/EU and halogen-free standards (IEC 61249-2-21) for eco-compliant manufacturing |
| Automated assembly compatible | Matte tin-plated Alloy 42 leads pass MIL-STD-202 Method 208, ensuring reliable reflow solder joint formation |
Applications
| Portable Power Management | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating bias voltage for low-power microcontroller reset circuits in battery-operated IoT nodes. IC Role / Device Role / Timing Role: Zener reference providing stable 8.2 V threshold for supervisor IC input. Use Value: Maintains reset accuracy over temperature (-40 to +85 °C) with <±5% VZ tolerance and low leakage (<3 μA). | Use Scenario: Setting precise reference voltage for 12-bit ADC front-end in industrial temperature transmitters. IC Role / Device Role / Timing Role: Low-noise DC reference source for ratiometric sensor excitation and ADC reference rail. Use Value: Delivers <8 Ω dynamic impedance and ~15 pF capacitance to minimize reference noise and settling time. |
| Automotive Body Control Modules | Medical Wearable Device Power Rails |
Use Scenario: Clamping transient overvoltage on LIN bus interface supply lines in BCM subassemblies. IC Role / Device Role / Timing Role: Transient voltage suppressor protecting 8–12 V rail against load-dump spikes. Use Value: Withstands 150 mW continuous dissipation and handles short pulses per Fig. 6 surge curve up to 10 W. | Use Scenario: Generating stable 8.2 V intermediate rail for analog front-end amplifiers in ECG patch sensors. IC Role / Device Role / Timing Role: Low-power voltage reference enabling ultra-low quiescent current design (<10 μA system sleep). Use Value: Achieves 3.0 μA max reverse leakage at 6.5 V, minimizing standby drain on coin-cell batteries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C8V2 | Same 8.2 V nominal, but SOD-523 package (slightly larger), 350 mW PD, higher ZZT (15 Ω) | Higher power handling suits higher-current references; less suitable for ultra-dense layouts | Select when >150 mW dissipation or lower thermal resistance is required |
| MMBZ5237BS-7-F | Identical electrical specs, but SOT-23 package (larger footprint, RθJA = 350 °C/W) | Better thermal performance, easier hand-soldering, but occupies ~3× board area | Select when thermal margin >833 °C/W is critical or legacy SOT-23 tooling is in use |
Compared with BZX584C8V2 and MMBZ5237BS-7-F, MMBZ5237BT-7-F uniquely balances ultra-miniature size, 150 mW rating, and 8.0 Ω impedance-making it optimal for space-constrained, low-leakage, medium-precision reference designs where thermal load is managed via layout.
Availability
MMBZ5237BT-7-F is available at Aetrix Electronics and suitable for portable power management, industrial sensor signal conditioning, and automotive body control modules requiring stable component supply with full traceability and lifecycle support.
Supply support for MMBZ5237BT-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-volume, cost-sensitive, space-constrained applications demanding consistent voltage reference and clamping performance in consumer, computing, and industrial end equipment.
FAQ
What is the maximum reverse voltage before breakdown for MMBZ5237BT-7-F?
The nominal Zener voltage is 8.2 V with a guaranteed range of 7.79 V to 8.61 V at 20 mA test current. Breakdown occurs within this band; operation below 6.5 V yields ≤3.0 μA leakage, confirming sharp knee behavior per datasheet Fig. 2 and 3.
Can MMBZ5237BT-7-F be used in place of a 5.1 V Zener diode?
No - MMBZ5237BT-7-F is a fixed 8.2 V Zener diode. Substituting it for a 5.1 V part (e.g., MMBZ5231BT) would result in incorrect regulation voltage, potentially damaging downstream circuitry or causing functional failure in voltage-sensitive logic interfaces.
Is the SOT-523 package hand-solderable?
Yes, but requires precision tools and controlled thermal profiles due to its 0.5 mm pitch and small pad area. Recommended for reflow-only assembly per J-STD-020D Level 1; manual soldering is feasible with fine-tip irons, flux, and magnification, though yield may decrease without process optimization.
Does MMBZ5237BT-7-F meet AEC-Q200 stress testing requirements?
No - this part is not AEC-Q200 qualified. It is rated for industrial temperature range (–65 °C to +150 °C) and RoHS compliance, but lacks automotive-specific qualification testing (e.g., vibration, temperature cycling, humidity bias). For automotive applications, consult Diodes' AEC-Q200-qualified Zener portfolio such as the BZT52 series.
MMBZ5237BT-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):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 150 mW
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 6.5 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
MMBZ5237BT-7-F FAQ
1.How can I place an order for MMBZ5237BT-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5237BT-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 MMBZ5237BT-7-F reliable?
The price and inventory of MMBZ5237BT-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 MMBZ5237BT-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5237BT-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5237BT-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5237BT-7-F?
MMBZ5237BT-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5237BT-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 MMBZ5237BT-7-F?
For technical support, including MMBZ5237BT-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5237BT-7-F requirements.
6.How does Aetrix verify that MMBZ5237BT-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5237BT-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 MMBZ5237BT-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5237BT-7-F?
All MMBZ5237BT-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5237BT-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 MMBZ5237BT-7-F part is unused and in its original packaging.
Return procedure for MMBZ5237BT-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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