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Diodes Incorporated MMBZ5235BT-7-F
- Part No.:
- MMBZ5235BT-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOT-523
- Datasheet:
-
MMBZ5235BT-7-F.pdf
- Description:
- DIODE ZENER 6.8V 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:5,872
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Product details
Overview
MMBZ5235BT-7-F from Diodes Incorporated is a 6.8 V, 150 mW surface-mount Zener diode in SOT-523 package, with 5.0 Ω zener impedance at 20 mA and 3.0 μA reverse leakage at 5.0 V, used for precision voltage regulation and overvoltage protection in space-constrained power management circuits.
For engineers reviewing the MMBZ5235BT-7-F datasheet, MMBZ5235BT-7-F pinout, MMBZ5235BT-7-F application, or MMBZ5235BT-7-F equivalent, key selection criteria include nominal zener voltage tolerance (±5%), thermal resistance (833 °C/W), low capacitance (≈15 pF), RoHS-compliant lead-free plating, and suitability for automated SMT assembly on FR-4 PCBs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and temperature conditions. Its planar die construction ensures consistent breakdown characteristics and low dynamic impedance across the 20 mA test current.
Designed for low-power signal-level regulation, it delivers 6.46–7.14 V zener voltage range at 25 °C with 750 Ω maximum knee impedance at 0.25 mA, enabling reliable clamping in bias networks and analog sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 6.8 V - precise DC reference for voltage monitoring and feedback loops |
| Zener Voltage Range | 6.46–7.14 V @ 25 °C - ±5% tolerance supports stable regulation in industrial temperature ranges |
| Zener Impedance | 5.0 Ω @ 20 mA - low dynamic resistance minimizes output voltage variation under load changes |
| Power Dissipation | 150 mW - limits thermal rise on standard FR-4 PCBs with recommended pad layout |
| Reverse Leakage | 3.0 μA @ 5.0 V - ensures minimal quiescent current in battery-powered sensing nodes |
| Thermal Resistance | 833 °C/W - defines junction-to-ambient temperature rise per watt dissipated |
| Capacitance | ≈15 pF - enables use in low-frequency signal conditioning without capacitive loading issues |
Pinout & Package
Package: SOT-523 - ultra-small plastic surface-mount case (1.60 × 0.80 × 0.50 mm), UL 94V-0 rated, moisture sensitivity level 1, compatible with reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential side in reverse-biased regulation configuration |
| Cathode | Zener breakdown terminal | Connected to higher potential side; voltage referenced to this node during regulation |
| Case | Non-electrical mechanical body | No internal connection; serves only as thermal and structural support |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT-523 footprint | Enables placement in high-density layouts where board area is constrained to <1.3 mm² |
| Planar die construction | Delivers tight parametric consistency and repeatable breakdown behavior across production lots |
| Lead-free / RoHS-compliant plating | Matte tin finish over Alloy 42 leadframe meets global environmental compliance requirements |
| Low thermal resistance packaging | Supports continuous operation up to +150 °C ambient when mounted per Diodes Inc. layout guidelines |
Applications
| Power Supply Reference | Sensor Bias Network |
|---|---|
Use Scenario: Providing stable 6.8 V reference for op-amp comparators in isolated DC-DC feedback paths. IC Role / Device Role / Timing Role: Voltage reference element establishing regulated threshold for error amplification. Use Value: Maintains ±0.34 V regulation window across -65 to +150 °C, ensuring consistent loop stability. | Use Scenario: Biasing NTC thermistors in automotive cabin temperature sensing modules. IC Role / Device Role / Timing Role: Precision shunt regulator setting excitation voltage for resistive sensor bridges. Use Value: Low 3.0 μA leakage prevents measurement drift in microamp-level bridge currents. |
| ESD Protection Clamp | Microcontroller I/O Protection |
Use Scenario: Clamping transient surges on RS-485 data lines in industrial fieldbus nodes. IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting ESD energy before IC input structures are stressed. Use Value: 150 mW rating sustains single 1 kV/100 ns surge events without degradation. | Use Scenario: Protecting GPIO pins of ARM Cortex-M0+ MCUs against accidental overvoltage during debug interface sharing. IC Role / Device Role / Timing Role: Low-capacitance (≈15 pF) clamp preserving signal integrity on 10 MHz SWD clock lines. Use Value: Prevents latch-up while adding <0.5 ns propagation delay to debug timing budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C6V8 | Same 6.8 V nominal, but SOD-523 package (slightly larger footprint); 10 Ω zener impedance | Higher thermal mass allows marginally better surge handling, but less suitable for ultra-dense layouts | Select if board layout permits 1.8 × 1.2 mm footprint and higher impedance is acceptable |
| MMSZ5235T1G | SOD-123 package; 6.8 V nominal; 7 Ω zener impedance; 500 mW power rating | Higher power dissipation supports higher current regulation but requires larger PCB area | Select when >20 mA regulation current or extended thermal margin is required |
Compared with BZX584C6V8 and MMSZ5235T1G, MMBZ5235BT-7-F offers the smallest footprint and lowest zener impedance among 6.8 V Zeners in its class, making it optimal for miniaturized, low-current reference designs where board space and regulation accuracy are critical.
Availability
MMBZ5235BT-7-F is available at Aetrix Electronics and suitable for power supply reference, sensor bias network, ESD protection clamp, and microcontroller I/O protection requiring stable component supply and full traceability.
Supply support for MMBZ5235BT-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, specializing in high-reliability components for industrial, computing, and consumer markets.
The MMBZ52xxBT series belongs to Diodes' general-purpose Zener diode product line, engineered for compact, cost-effective voltage regulation and clamping in automated SMT production environments.
FAQ
What is the maximum continuous Zener current for MMBZ5235BT-7-F?
The device is rated for 150 mW total power dissipation. At its nominal 6.8 V zener voltage, this corresponds to a maximum continuous Zener current of approximately 22 mA under ideal thermal conditions. Derating is required above 25 °C ambient per the 833 °C/W thermal resistance curve.
Is MMBZ5235BT-7-F suitable for bidirectional ESD protection?
No - it is a unidirectional Zener diode optimized for reverse-bias regulation. For bidirectional ESD protection, a dedicated TVS diode such as the D3V3M1U2LP should be used instead, as MMBZ5235BT-7-F lacks symmetric clamping capability in forward conduction.
Does the SOT-523 package support hand-soldering repair?
While technically possible with fine-tip irons and flux, the SOT-523's 0.50 mm pitch and 0.22 mm lead width make manual rework highly challenging. Diodes Incorporated recommends using reflow profiles per J-STD-020D and automated placement for production reliability.
How does the 3.0 μA reverse leakage at 5.0 V impact low-power sensor circuits?
This leakage introduces negligible error in typical sensor bias networks drawing ≥100 μA. In nanoamp-level applications (e.g., photodiode transimpedance amps), leakage may dominate input current and require alternative solutions like series-connected low-leakage diodes or active compensation.
MMBZ5235BT-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):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 150 mW
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 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
MMBZ5235BT-7-F FAQ
1.How can I place an order for MMBZ5235BT-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5235BT-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 MMBZ5235BT-7-F reliable?
The price and inventory of MMBZ5235BT-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 MMBZ5235BT-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5235BT-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5235BT-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5235BT-7-F?
MMBZ5235BT-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5235BT-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 MMBZ5235BT-7-F?
For technical support, including MMBZ5235BT-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5235BT-7-F requirements.
6.How does Aetrix verify that MMBZ5235BT-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5235BT-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 MMBZ5235BT-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5235BT-7-F?
All MMBZ5235BT-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5235BT-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 MMBZ5235BT-7-F part is unused and in its original packaging.
Return procedure for MMBZ5235BT-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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