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onsemi MMBZ5234BLT3G
- Part No.:
- MMBZ5234BLT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5234BLT3G.pdf
- Description:
- DIODE ZENER 6.2V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,292
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Product details
Overview
MMBZ5234BLT3G from onsemi is a 6.2 V, 225 mW surface-mount Zener diode in SOT-23 package, designed for precision voltage regulation and overvoltage protection in space-constrained circuits. It delivers 7 Ω dynamic impedance at 20 mA test current, supports ≤5 μA leakage at 4 V reverse bias, and features Class 3 ESD rating (>16 kV HBM). It is deployed in portable power rails, USB interface clamping, and voltage reference circuits for battery-powered IoT sensors.
For engineers reviewing the MMBZ5234BLT3G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (556 °C/W on FR-5), cathode-anode polarity marking, and Pb-free RoHS-compliant packaging suitable for automated SMT assembly.
Technical Context
This device operates as a two-terminal voltage reference diode with fixed reverse breakdown behavior. Its Zener voltage is specified at 20 mA test current (IZT) with ±5% tolerance, and exhibits 7 Ω dynamic impedance (ZZT) under that condition. Temperature coefficient is near-zero around 6.2 V, minimizing drift across −65°C to +150°C operating range.
The SOT-23 package uses Style 8 pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode), enabling unidirectional clamping without internal series resistance. It achieves 225 mW power dissipation on FR-5 board with 1.8 mW/°C derating above 25°C, and supports ≤0.95 V forward voltage at 10 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.2 V nominal, 5.89–6.51 V min–max at IZT = 20 mA - defines stable regulation point for low-power biasing |
| Power Dissipation (PD) | 225 mW on FR-5 board at 25°C - sets maximum continuous clamping energy in handheld PCBs |
| Zener Impedance (ZZT) | 7 Ω at IZT = 20 mA - ensures <140 mV output variation for ±14 mA load current shifts |
| Leakage Current (IR) | ≤5 μA at VR = 4 V - guarantees minimal standby power loss in always-on sensor nodes |
| ESD Rating | Class 3 (>16 kV HBM) - enables direct placement on exposed I/O lines without external protection |
| Forward Voltage (VF) | ≤0.95 V at IF = 10 mA - allows use as low-drop rectifier or logic-level clamp in mixed-signal domains |
| Thermal Resistance (RJA) | 556 °C/W on FR-5 - informs thermal rise under sustained 225 mW operation in dense layouts |
Pinout & Package
SOT-23 (TO-236) package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting plastic case with corrosion-resistant finish; cathode indicated by band; UL 94 V-0 flammability rating; max solder temperature 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node during Zener operation; forward conduction path when biased positively |
| Pin 2 | No Connection | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress |
| Pin 3 | Cathode | Connected to higher-potential node during regulation; polarity band aligns with this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW Power Rating | Enables robust transient suppression in 3.3 V and 5 V rail protection without heatsinking |
| Class 3 ESD Protection | Eliminates need for discrete TVS in USB 2.0 data line ESD hardening per IEC 61000-4-2 Level 4 |
| Pb-Free / RoHS Compliance | Meets global environmental mandates and supports lead-free reflow profiles (J-STD-020) |
| Small SOT-23 Footprint | Reduces PCB area by >60% vs. DO-35, critical for wearable device power management sections |
| AEC-Q101 Not Qualified | Intended for commercial/industrial applications only; not validated for automotive underhood environments |
Applications
| USB Data Line Clamping | Low-Power Sensor Reference |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB 2.0 interfaces against ESD events and bus overvoltage. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed between differential pair and ground, activated only during overvoltage transients. Use Value: Leverages 6.2 V Zener voltage to clamp below USB 3.3 V signaling threshold while surviving >16 kV HBM strikes. |
Use Scenario: Providing stable 6.2 V reference for ADC biasing in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference sourcing <100 μA quiescent current in ultra-low-power sleep mode. Use Value: Achieves ±0.3 V regulation stability over −40°C to +85°C due to near-zero TC at 6.2 V nominal. |
| Portable Device Power Rail Clamp | Logic-Level Signal Translation |
Use Scenario: Limiting voltage spikes on 5 V supply rails in handheld medical monitors during battery insertion/removal. IC Role / Device Role / Timing Role: Shunt regulator connected between rail and ground, conducting only during overvoltage excursions >6.5 V. Use Value: 225 mW rating sustains 100 ms transients without thermal runaway; 7 Ω ZZT ensures fast response to sub-μs surges. |
Use Scenario: Level-shifting 1.8 V GPIO signals to 3.3 V domain using Zener-based passive translator. IC Role / Device Role / Timing Role: Cathode tied to 3.3 V rail, anode driving 1.8 V logic; forward drop defines high-level threshold. Use Value: ≤0.95 V forward voltage enables reliable detection of 1.8 V logic high while blocking reverse current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V2LT1G | Same 6.2 V nominal, but 300 mW rating and 10 Ω ZZT; SOT-23 package with identical pinout (Style 8) | Higher power handling suits longer-duration transients; slightly higher impedance reduces regulation precision | Select when system requires >225 mW surge absorption and can tolerate ±0.5% tighter VZ tolerance |
| MMBZ5234BS | Same electrical specs but in SOD-123 package (3.7 × 1.6 × 1.1 mm); no NC pin; 350 mW rating on FR-4 | Larger footprint eases hand-soldering and improves thermal margin; incompatible with fine-pitch SMT lines | Choose for prototyping or industrial controls where manual assembly or higher reliability under thermal cycling is prioritized |
Compared with BZX84-C6V2LT1G and MMBZ5234BS, MMBZ5234BLT3G offers optimal balance of compact SOT-23 size, 225 mW capability, and 7 Ω low-impedance regulation-making it preferred for high-density consumer electronics where board space and ESD immunity are co-critical.
Availability
MMBZ5234BLT3G is available at Aetrix Electronics and suitable for USB interface protection, portable power rail clamping, and low-power sensor reference circuits requiring stable component supply and full traceability.
Supply support for MMBZ5234BLT3G 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
onsemi (Semiconductor Components Industries, LLC) is a global semiconductor supplier specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications.
The MMBZ52xxBLT3G series belongs to onsemi's precision Zener voltage regulator product line, engineered specifically for space-constrained, low-power voltage reference and transient suppression in portable and high-density electronics.
FAQ
What is the Zener voltage tolerance of MMBZ5234BLT3G?
The MMBZ5234BLT3G has a Zener voltage tolerance of ±5% around its nominal 6.2 V value, meaning the actual measured VZ falls between 5.89 V and 6.51 V when tested at IZT = 20 mA and TA = 25°C. This tolerance is guaranteed across production lots and is verified per onsemi's AEC-Q101-aligned test flow for commercial-grade Zeners.
Does MMBZ5234BLT3G have a built-in capacitor or resistor?
No, MMBZ5234BLT3G is a discrete two-terminal Zener diode with no integrated passive components. Its SOT-23 package contains only the silicon junction; Pin 2 is explicitly marked "No Connection" in the datasheet and must remain unconnected on the PCB. Any required filtering or current-limiting must be implemented externally.
Can MMBZ5234BLT3G be used in automotive applications?
MMBZ5234BLT3G is not AEC-Q101 qualified and is rated for commercial/industrial use only. While its operating temperature range (−65°C to +150°C) overlaps with some automotive requirements, onsemi does not certify this variant for automotive applications. For such use cases, the SZMMBZ5234BLT3G (with SZ prefix) must be selected instead.
What is the maximum reverse leakage current for MMBZ5234BLT3G at 4 V?
The maximum reverse leakage current (IR) for MMBZ5234BLT3G at VR = 4 V and TA = 25°C is 5 μA, as specified in the Electrical Characteristics table. This low leakage ensures minimal current draw in always-on circuits such as real-time clock backup rails or battery-monitoring comparators using MMBZ5234BLT3G as a reference.
How does the NC pin (Pin 2) affect PCB layout for MMBZ5234BLT3G?
Pin 2 of MMBZ5234BLT3G is internally unconnected and must not be soldered to any net on the PCB. Layout guidelines require leaving this pad floating-no copper pour, trace, or thermal relief should contact it-to prevent mechanical stress, solder wicking, or unintended parasitic coupling that could degrade ESD performance or long-term reliability of the MMBZ5234BLT3G device.
MMBZ5234BLT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 4 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-23-3 (TO-236)
MMBZ5234BLT3G FAQ
1.How can I place an order for MMBZ5234BLT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5234BLT3G 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 MMBZ5234BLT3G reliable?
The price and inventory of MMBZ5234BLT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5234BLT3G is usually 5 days.
3.What payment methods are accepted for MMBZ5234BLT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5234BLT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5234BLT3G?
MMBZ5234BLT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5234BLT3G 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 MMBZ5234BLT3G?
For technical support, including MMBZ5234BLT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5234BLT3G requirements.
6.How does Aetrix verify that MMBZ5234BLT3G is sourced from the original manufacturer or authorized distributors?
All MMBZ5234BLT3G 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 MMBZ5234BLT3G meets industry standards.
7.What is the process for return or replacement of MMBZ5234BLT3G?
All MMBZ5234BLT3G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5234BLT3G, 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 MMBZ5234BLT3G part is unused and in its original packaging.
Return procedure for MMBZ5234BLT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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