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onsemi MMBZ5234ELT1G
- Part No.:
- MMBZ5234ELT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5234ELT1G.pdf
- Description:
- DIODE ZENER 6.2V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,232
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Product details
Overview
MMBZ5234ELT1G from onsemi is a 6.2 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation at 25°C, with 7 Ω dynamic impedance at 20 mA test current and 0.25 μA leakage current at 4 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the MMBZ5234ELT1G datasheet, pinout, applications, or equivalent options, this device is selected for compact voltage regulation where space-constrained PCBs demand high-density SMT placement, stable Zener voltage tolerance, and ESD-hardened operation up to 16 kV HBM.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 6.2 V at 20 mA test current (IZT), exhibiting a temperature coefficient near zero (±0.002%/°C typical) in its 6.2 V range. Its 7 Ω Zener impedance (ZZT) ensures minimal voltage deviation under load variation.
The SOT-23 package features a defined pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode), enabling unambiguous orientation during automated assembly. The device is Pb-free, AEC-Q101 qualified in SZ-prefix variants, and rated for junction temperatures from −65°C to +150°C.
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-voltage rail clamping |
| Zener Impedance (ZZT) | 7 Ω max at IZT = 20 mA - ensures <50 mV output shift under ±5 mA load change |
| Power Dissipation (PD) | 225 mW on FR-5 board at TA = 25°C - supports continuous operation in handheld battery-powered circuits |
| Leakage Current (IR) | 0.25 μA max at VR = 4 V - prevents excessive standby current in always-on sensing nodes |
| ESD Rating | Class 3 (>16 kV) per HBM - eliminates need for external ESD protection in USB/IO interfaces |
| Junction Temp Range | −65°C to +150°C - enables deployment in automotive cabin modules and industrial edge sensors |
| Package | SOT-23 (TO-236), 2.90 × 1.30 × 1.00 mm - fits 0805 footprint area with solderable terminations |
Pinout & Package
SOT-23 surface-mount plastic package (Case 318, Style 8), void-free thermosetting construction, UL 94 V-0 flammability rating, and cathode polarity band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node; reverse-biased during Zener operation |
| Pin 2 | No Connection | Internally isolated; must remain floating - no PCB trace or pad required |
| Pin 3 | Cathode | Connected to regulated voltage rail; polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW Power Rating | Enables use in 3.3 V/5 V logic supply rails without thermal derating on standard FR-5 boards |
| 7 Ω Dynamic Impedance | Delivers ≤35 mV regulation error across 10–30 mA load current swing |
| 16 kV HBM ESD Robustness | Eliminates need for discrete TVS in front-end IO protection for wearables and IoT sensors |
| Pb-Free & RoHS Compliant | Meets IPC-J-STD-020 moisture sensitivity level 1 (MSL-1) for unlimited floor life |
| −65°C to +150°C Operating Range | Supports under-hood automotive modules and outdoor industrial gateways without derating |
Applications
| USB Port Overvoltage Clamp | Microcontroller Reset Circuit Reference |
|---|---|
Use Scenario: Protecting USB data lines from transient surges during hot-plug events in portable chargers. IC Role / Device Role / Timing Role: Zener clamping element shunting excess voltage above 6.2 V to ground before it reaches PHY IC. Use Value: Prevents latch-up in USB transceivers by limiting common-mode voltage to within 6.51 V absolute maximum. |
Use Scenario: Generating a stable reset threshold for 3.3 V microcontrollers in battery-backed smart meters. IC Role / Device Role / Timing Role: Precision voltage reference feeding comparator input in supervisor IC or discrete reset circuit. Use Value: Ensures reset assertion remains valid down to 2.8 V supply, leveraging tight 6.2 V ±5% tolerance and low tempco. |
| Low-Power Sensor Biasing | Industrial Analog Input Protection |
Use Scenario: Providing stable 6.2 V bias to MEMS accelerometer signal conditioning circuitry in wireless condition monitors. IC Role / Device Role / Timing Role: Low-current Zener reference replacing higher-power LDO where quiescent current <1 μA is critical. Use Value: Draws only 0.25 μA leakage at 4 V, extending coin-cell life beyond 10 years in sleep-mode operation. |
Use Scenario: Front-end overvoltage protection for 4–20 mA loop-powered analog inputs in PLC I/O modules. IC Role / Device Role / Timing Role: Fast-acting clamp limiting input transients to 6.51 V before reaching op-amp input stage. Use Value: Survives 225 W peak pulses (8 × 20 μs) without degradation, meeting IEC 61000-4-5 Level 3 surge immunity. |
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, but 350 mW PD and 10 Ω ZZT - higher power, higher impedance | Preferred where board space allows larger SOT-23 variant and >200 mW pulse handling is needed | Select BZX84-C6V2 if system requires higher surge energy absorption without changing layout |
| MMBZ5234BS | Same electrical specs, but in SOD-323 package - 1.7 × 1.25 × 0.95 mm vs. SOT-23's 2.9 × 1.3 × 1.0 mm | Better suited for ultra-high-density RF modules where footprint area is constrained below 3.8 mm² | Choose MMBZ5234BS when minimizing PCB real estate outweighs rework risk from smaller pitch |
Compared with BZX84-C6V2 and MMBZ5234BS, the MMBZ5234ELT1G delivers optimal balance of low-profile SOT-23 compatibility, 7 Ω regulation stiffness, and production-ready tape-and-reel packaging - making it ideal for high-volume portable electronics requiring validated AEC-Q101 readiness and 3,000-unit reel logistics.
Availability
MMBZ5234ELT1G is available at Aetrix Electronics and suitable for USB interface protection, microcontroller reset supervision, low-power sensor biasing, and industrial analog input protection requiring stable component supply and long-term lifecycle assurance.
Supply support for MMBZ5234ELT1G 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 MMBZ52xxELT1G series targets space-constrained, low-power voltage regulation - designed specifically for handheld portables, high-density PC boards, and battery-operated edge devices needing reliable Zener clamping without thermal overhead.
FAQ
What is the Zener voltage tolerance of MMBZ5234ELT1G?
The MMBZ5234ELT1G has a Zener voltage tolerance of ±5% around its nominal 6.2 V rating, meaning the actual measured VZ falls between 5.89 V and 6.51 V at 20 mA test current and 25°C ambient. This tolerance is guaranteed across the full operating temperature range and is verified per onsemi's production test flow - ensuring consistent performance in MMBZ5234ELT1G-based voltage references.
Does MMBZ5234ELT1G have a functional pin 2 connection?
No, pin 2 of the MMBZ5234ELT1G is internally not connected (NC) and must remain unconnected on the PCB. The device uses only pins 1 (anode) and 3 (cathode) for operation. This NC configuration is explicitly defined in the datasheet's pinout diagram (Style 8) and confirmed in the mechanical outline - misrouting pin 2 will not affect MMBZ5234ELT1G functionality but may cause assembly inspection fails.
Can MMBZ5234ELT1G replace older MMBZ5234ELT1 parts?
Yes, MMBZ5234ELT1G is the Pb-free, halogen-free successor to MMBZ5234ELT1, with identical electrical specifications, SOT-23 package dimensions, and pinout. The "G" suffix denotes RoHS compliance and qualifies MMBZ5234ELT1G for new designs requiring environmental compliance - no layout or schematic changes are needed when upgrading from MMBZ5234ELT1 to MMBZ5234ELT1G.
What is the maximum allowable surge current for MMBZ5234ELT1G?
The MMBZ5234ELT1G supports nonrepetitive peak pulse power of 225 W for an 8 × 20 μs waveform, corresponding to a peak surge current of approximately 1.5 A at 6.2 V. This capability is validated per Figure 9 in the datasheet and enables MMBZ5234ELT1G to absorb IEC 61000-4-5 Level 3 surges without parametric shift or failure - critical for MMBZ5234ELT1G deployment in industrial fieldbus interfaces.
Is MMBZ5234ELT1G suitable for automotive applications?
The SZMMBZ5234ELT1G variant (AEC-Q101 qualified, PPAP-capable) is certified for automotive use, while the standard MMBZ5234ELT1G is intended for commercial/industrial applications. Though MMBZ5234ELT1G shares identical electrical and thermal specs, only the SZ-prefix version undergoes automotive-specific stress testing - designers targeting automotive cabin modules must specify SZMMBZ5234ELT1G, not MMBZ5234ELT1G.
MMBZ5234ELT1G 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:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MMBZ5234ELT1G FAQ
1.How can I place an order for MMBZ5234ELT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5234ELT1G 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 MMBZ5234ELT1G reliable?
The price and inventory of MMBZ5234ELT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5234ELT1G is usually 5 days.
3.What payment methods are accepted for MMBZ5234ELT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5234ELT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5234ELT1G?
MMBZ5234ELT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5234ELT1G 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 MMBZ5234ELT1G?
For technical support, including MMBZ5234ELT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5234ELT1G requirements.
6.How does Aetrix verify that MMBZ5234ELT1G is sourced from the original manufacturer or authorized distributors?
All MMBZ5234ELT1G 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 MMBZ5234ELT1G meets industry standards.
7.What is the process for return or replacement of MMBZ5234ELT1G?
All MMBZ5234ELT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5234ELT1G, 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 MMBZ5234ELT1G part is unused and in its original packaging.
Return procedure for MMBZ5234ELT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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