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onsemi MMBZ5234BLT1
- Part No.:
- MMBZ5234BLT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5234BLT1.pdf
- Description:
- DIODE ZENER 6.2V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,475
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Product details
Overview
MMBZ5234BLT1 from onsemi is a 225 mW surface-mount Zener diode in SOT-23 package, rated for 6.2 V nominal reverse breakdown voltage at 20 mA test current, with 7 Ω dynamic impedance and 5 μA leakage current at 4 V reverse bias. It provides precision voltage regulation in space-constrained applications including portable power rails and ESD-protected signal lines.
For engineers reviewing the MMBZ5234BLT1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, cathode-anode polarity mapping, and direct alternatives for voltage reference and overvoltage clamp design.
Technical Context
This device operates as a two-terminal voltage reference diode with fixed reverse-biased Zener conduction. Its 6.2 V nominal Zener voltage exhibits low temperature coefficient (≈+2.5 mV/°C) and stable regulation across −65°C to +150°C junction temperature range.
The SOT-23 package supports automated placement and reflow soldering at 260°C for 10 seconds. With 1.8 mW/°C thermal derating on FR-5 board and 556°C/W junction-to-ambient thermal resistance, it maintains regulation integrity under moderate power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.2 V nominal at 20 mA - defines precise clamping threshold for overvoltage protection circuits |
| Power Dissipation (PD) | 225 mW on FR-5 board - sets maximum continuous DC power handling before thermal shutdown |
| Zener Impedance (ZZT) | 7 Ω at IZT = 20 mA - ensures minimal output voltage variation under load current changes |
| Leakage Current (IR) | 5 μA at VR = 4 V - guarantees low standby current in high-impedance bias networks |
| Forward Voltage (VF) | 0.95 V max at IF = 10 mA - enables use as low-drop rectifier or ESD shunt in forward mode |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust electrostatic discharge immunity without external protection |
| Junction Temperature Range | −65°C to +150°C - supports operation in automotive under-hood and industrial ambient environments |
Pinout & Package
SOT-23 (TO-236) package: 2.90 mm × 1.30 mm × 1.00 mm body, 1.90 mm lead pitch, void-free thermosetting plastic case with corrosion-resistant finish. Cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; source of forward current |
| 2 | No Connection | Internally unconnected terminal - must remain floating in PCB layout |
| 3 | Cathode | Connected to higher-potential node in reverse-bias configuration; defines regulated output reference point |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free, Halogen-Free/BFR-Free | RoHS-compliant construction enabling use in consumer and automotive electronics without material restrictions |
| 225 mW Power Rating | Enables stable voltage reference in compact battery-powered devices without heatsinking |
| Class 3 ESD Protection | Eliminates need for discrete TVS diodes in I/O line protection designs |
| Optimized SOT-23 Footprint | Supports high-density PCB layouts and automated assembly with standard pick-and-place equipment |
| Low Zener Impedance (7 Ω) | Maintains tight regulation tolerance (<±0.5%) across 5–25 mA operating current range |
Applications
| USB Data Line Protection | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamps transient voltages on USB D+/D− lines during hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Zener diode configured as bidirectional shunt clamp between data line and ground. Use Value: Leverages 6.2 V breakdown and >16 kV HBM rating to suppress ±8 kV contact ESD per IEC 61000-4-2 without signal distortion. |
Use Scenario: Generates clean, temperature-stable reset threshold for 3.3 V microcontrollers. IC Role / Device Role / Timing Role: Precision voltage reference feeding comparator input in power-on reset generator. Use Value: 7 Ω dynamic impedance and <±2% VZ tolerance ensure reset assertion within 100 ms of supply ramp-up. |
| Portable Device Battery Monitor | Industrial Sensor Signal Conditioning |
Use Scenario: Provides stable reference for ADC measurement of Li-ion cell voltage in wearables. IC Role / Device Role / Timing Role: Low-power Zener reference in resistive divider network feeding SAR ADC input. Use Value: 5 μA leakage at 4 V ensures <1 μA loading error on 1 MΩ divider, preserving 12-bit measurement accuracy. |
Use Scenario: Regulates excitation voltage for 4–20 mA loop-powered pressure transducers. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant 6.2 V across sensor bridge supply. Use Value: 225 mW rating and −65°C to +150°C operation support reliable performance in unheated factory-floor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V2 | Same 6.2 V nominal Zener voltage, but 300 mW rating and higher ZZT (10 Ω); SOT-23 package with identical pinout (Pin 1-Anode, Pin 2-NC, Pin 3-Cathode) | Higher power handling suits higher-current regulation, but looser impedance impacts precision reference stability | Select BZX84-C6V2 when >225 mW dissipation is required and ±1% VZ tolerance is acceptable |
| MMBZ5234BS | Same electrical specs (6.2 V, 7 Ω, 5 μA), but in SOD-123 package (3.7 mm × 1.6 mm) with different footprint and thermal resistance (RJA = 450°C/W) | Larger package allows higher board-level power dissipation but occupies 2.5× more area than SOT-23 | Select MMBZ5234BS when board layout permits larger footprint and thermal management requires lower RJA |
Compared with MMBZ5234BLT1, BZX84-C6V2 offers higher power margin at the cost of regulation precision, while MMBZ5234BS trades miniaturization for improved thermal performance-both require no circuit redesign but demand PCB layout verification.
Availability
MMBZ5234BLT1 is available at Aetrix Electronics and suitable for USB interface protection, microcontroller reset generation, portable battery monitoring, and industrial sensor excitation requiring stable component supply and RoHS compliance.
Supply support for MMBZ5234BLT1 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBZ52xxBLT1G series was designed specifically for space-constrained voltage regulation and ESD protection in portable electronics, emphasizing low-profile packaging, high reliability, and full RoHS compliance.
FAQ
What is the exact Zener voltage tolerance for MMBZ5234BLT1?
The MMBZ5234BLT1 has a guaranteed Zener voltage range of 5.89 V (min) to 6.51 V (max) at 20 mA test current, corresponding to ±5% tolerance around the 6.2 V nominal value. This specification is validated per onsemi's Electrical Characteristics table on page 3 of the July 2024 datasheet revision.
Does MMBZ5234BLT1 support automotive-grade applications?
MMBZ5234BLT1 is not AEC-Q101 qualified; however, the SZMMBZ5234BLT1G variant (with SZ prefix) meets AEC-Q101 requirements and PPAP capability. For automotive use, engineers must specify the SZ-prefixed part-MMBZ5234BLT1 itself is intended for commercial and industrial applications only.
Can MMBZ5234BLT1 be used in forward-bias mode?
Yes, MMBZ5234BLT1 functions as a standard silicon diode in forward bias, with forward voltage ≤0.95 V at 10 mA. Its 0.95 V VF rating supports use in low-voltage clamping or level-shifting circuits where minimal forward drop is critical.
What is the thermal derating behavior of MMBZ5234BLT1 above 25°C?
MMBZ5234BLT1 derates linearly at 1.8 mW/°C above 25°C ambient temperature when mounted on FR-5 board. At 85°C ambient, its usable power drops to 117 mW (225 mW − (85−25) × 1.8), ensuring safe operation without exceeding 150°C junction limit.
Is Pin 2 of MMBZ5234BLT1 electrically connected internally?
No, Pin 2 of MMBZ5234BLT1 is a no-connect (NC) terminal per onsemi's mechanical outline documentation (Style 8, page 6). It must remain unconnected on the PCB; routing traces to or from Pin 2 may cause assembly defects or unintended parasitic coupling.
MMBZ5234BLT1 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)
MMBZ5234BLT1 FAQ
1.How can I place an order for MMBZ5234BLT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5234BLT1 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 MMBZ5234BLT1 reliable?
The price and inventory of MMBZ5234BLT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5234BLT1 is usually 5 days.
3.What payment methods are accepted for MMBZ5234BLT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5234BLT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5234BLT1?
MMBZ5234BLT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5234BLT1 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 MMBZ5234BLT1?
For technical support, including MMBZ5234BLT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5234BLT1 requirements.
6.How does Aetrix verify that MMBZ5234BLT1 is sourced from the original manufacturer or authorized distributors?
All MMBZ5234BLT1 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 MMBZ5234BLT1 meets industry standards.
7.What is the process for return or replacement of MMBZ5234BLT1?
All MMBZ5234BLT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5234BLT1, 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 MMBZ5234BLT1 part is unused and in its original packaging.
Return procedure for MMBZ5234BLT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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