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onsemi MMSZ5234BT1
- Part No.:
- MMSZ5234BT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5234BT1.pdf
- Description:
- DIODE ZENER 6.2V 500MW SOD-123
- Quantity:
- Payment:
- Shipping:
Inventory:6,129
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Product details
Overview
MMSZ5234BT1 from ON Semiconductor is a 6.2 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation on FR−5 board at 75°C, with 7 Ω dynamic impedance at 20 mA test current and 0.25 µA leakage at 4 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power analog circuits, DC-DC feedback loops, and microcontroller I/O protection.
For engineers reviewing the MMSZ5234BT1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, SOD−123 terminal mapping, and direct alternatives for voltage regulation and clamping designs requiring stable 6.2 V reference under 20 mA operating conditions.
Technical Context
The MMSZ5234BT1 operates as a silicon planar Zener diode with avalanche breakdown mechanism optimized for thermal equilibrium operation at TL = 30°C ±1°C. Its nominal Zener voltage of 6.2 V is specified with junction temperature stabilized during measurement, ensuring repeatability across production lots.
It exhibits a typical temperature coefficient of +2.5 mV/°C near 6.2 V, enabling predictable drift compensation in reference circuits. The device supports continuous DC operation up to 150°C junction temperature and withstands transient surge power up to 100 W for 1 ms rectangular pulses at 25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.2 V nominal, 5.89–6.51 V range at 20 mA - defines stable regulation point for feedback or clamping |
| Power Dissipation (PD) | 500 mW on FR−5 board @ TL = 75°C - sets maximum steady-state thermal load without heatsinking |
| Zener Impedance (ZZT) | 7 Ω max @ IZT = 20 mA - ensures minimal output voltage variation under load current changes |
| Leakage Current (IR) | 0.25 µA max @ VR = 4 V - guarantees low standby power loss in high-impedance bias networks |
| Junction Temperature Range | −55°C to +150°C - enables deployment in automotive engine compartments and industrial control enclosures |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust handling during automated PCB assembly and field service |
Pinout & Package
SOD−123 surface-mount plastic package (Case 425, Style 1), void-free thermosetting epoxy body with corrosion-resistant solderable finish; cathode indicated by polarity band; 260°C max soldering temperature for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener anode connection in reverse-bias configuration | Connected to regulated voltage node; carries full Zener current during conduction |
| 2 (Anode) | Zener cathode connection in reverse-bias configuration | Connected to circuit ground or lower-potential rail; establishes reference return path |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW FR−5 board rating | Enables use in space-constrained consumer and industrial PCBs without external heat sinking |
| ±5% Zener tolerance | Supports cost-sensitive applications where tight regulation is not required but repeatable thresholding is essential |
| 150°C max junction temperature | Permits operation in under-hood automotive modules and sealed industrial sensors |
| UL 94 V−0 flammability rating | Meets safety requirements for mains-connected equipment and Class II power supplies |
| Pb−Free construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profile standards |
Applications
| Microcontroller I/O Protection | DC-DC Converter Feedback |
|---|---|
Use Scenario: Clamping 3.3 V or 5 V GPIO lines against ESD or supply transients in embedded systems. IC Role / Device Role / Timing Role: Voltage clamp limiting input voltage to safe levels while diverting surge current to ground. Use Value: Prevents latch-up or permanent damage to MCU pins using only 0.25 µA leakage at 4 V, minimizing quiescent power impact. |
Use Scenario: Providing precise 6.2 V reference to error amplifier in adjustable buck converter feedback network. IC Role / Device Role / Timing Role: Stable voltage reference setting output voltage via resistor divider ratio. Use Value: Maintains ±5% output accuracy over temperature due to 7 Ω Zener impedance and +2.5 mV/°C TC, reducing need for trimming. |
| Low-Power Sensor Biasing | Industrial Signal Conditioning |
Use Scenario: Generating stable bias voltage for analog sensor front-ends in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Low-current Zener reference supplying excitation voltage to resistive or capacitive sensors. Use Value: Draws only 20 mA max test current and sustains regulation down to 1 mA, extending battery life in sleep-mode operation. |
Use Scenario: Protecting 0–10 V analog input channels from overvoltage events in PLC analog modules. IC Role / Device Role / Timing Role: Shunt limiter absorbing fault energy before downstream op-amps or ADC inputs. Use Value: Withstands 100 W non-repetitive surge for 1 ms, providing margin against lightning-induced surges on field wiring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C6V2 | Same 6.2 V ±5%, but SOD-323 package (smaller footprint, 350 mW rating) | Lower power handling limits use in high-current regulation; better for ultra-dense layouts | Select when board area is critical and peak Zener current stays below 15 mA |
| MMSZ5234ET1G | Identical electrical specs but Pb-free and AEC-Q101 qualified (SZ prefix variant) | Required for automotive ECUs and safety-critical industrial controllers | Select when automotive qualification or enhanced process traceability is mandated |
Compared with MMSZ5234BT1, BZX584-C6V2 trades 150 mW power capability for 30% smaller footprint, while MMSZ5234ET1G adds automotive qualification without altering regulation performance-making the original MMSZ5234BT1 optimal for cost-sensitive industrial and consumer designs needing 500 mW headroom.
Availability
MMSZ5234BT1 is available at Aetrix Electronics and suitable for microcontroller I/O protection, DC-DC converter feedback, and low-power sensor biasing requiring stable component supply, consistent Zener voltage tolerance, and SOD−123 surface-mount compatibility.
Supply support for MMSZ5234BT1 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
ON Semiconductor is a global semiconductor manufacturer specializing in power management, analog, sensor, and discrete devices for automotive, industrial, and cloud power applications.
The MMSZ52xxxT1G series was designed for general-purpose medium-current voltage regulation and clamping in space-constrained surface-mount applications, emphasizing thermal stability, ESD robustness, and Pb-free compliance.
FAQ
What is the Zener voltage tolerance for MMSZ5234BT1?
The MMSZ5234BT1 has a ±5% Zener voltage tolerance, meaning its reverse breakdown voltage is guaranteed between 5.89 V and 6.51 V when tested at 20 mA (IZT) and thermal equilibrium. This tolerance is confirmed in the "5% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table on page 3 of the ON Semiconductor datasheet, and applies specifically to the "B" suffix variant like MMSZ5234BT1.
Does MMSZ5234BT1 require a heatsink in standard PCB layouts?
No, MMSZ5234BT1 does not require a heatsink when mounted on FR−5 board with the minimum recommended footprint, as its 500 mW power rating is validated under those conditions. Derating begins above 75°C lead temperature at 6.7 mW/°C, so natural convection cooling suffices for ambient temperatures ≤50°C and continuous currents ≤20 mA. The MMSZ5234BT1's thermal resistance (RJL = 150°C/W) supports this passive operation.
What is the maximum reverse leakage current for MMSZ5234BT1 at 4 V?
The maximum reverse leakage current for MMSZ5234BT1 at 4 V reverse bias is 0.25 µA, as specified in the Electrical Characteristics table on page 3 of the datasheet. This value is measured at TA = 25°C and confirms low standby power draw, making the MMSZ5234BT1 suitable for battery-powered applications where quiescent current must be minimized.
Is MMSZ5234BT1 compatible with lead-free reflow soldering processes?
Yes, MMSZ5234BT1 is Pb−free and qualified for lead-free reflow soldering per JEDEC J-STD-020. Its maximum soldering temperature is 260°C for 10 seconds, matching standard Pb-free reflow profiles. The device marking "MMSZ5234BT1G" (where "G" denotes Pb-free) aligns with ON Semiconductor's Pb-free strategy documentation referenced in the datasheet.
How does the temperature coefficient affect MMSZ5234BT1 in precision reference applications?
The MMSZ5234BT1 has a typical positive temperature coefficient of +2.5 mV/°C near 6.2 V, meaning its Zener voltage increases linearly with junction temperature. In precision reference applications, this drift must be compensated-either through circuit design (e.g., combining with negative TC components) or by operating within a controlled thermal environment. The coefficient is documented in Figure 1 of the datasheet and applies specifically to the MMSZ52xxBT1G series, including MMSZ5234BT1.
MMSZ5234BT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 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:
- SOD-123
MMSZ5234BT1 FAQ
1.How can I place an order for MMSZ5234BT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5234BT1 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 MMSZ5234BT1 reliable?
The price and inventory of MMSZ5234BT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5234BT1 is usually 5 days.
3.What payment methods are accepted for MMSZ5234BT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5234BT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5234BT1?
MMSZ5234BT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5234BT1 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 MMSZ5234BT1?
For technical support, including MMSZ5234BT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5234BT1 requirements.
6.How does Aetrix verify that MMSZ5234BT1 is sourced from the original manufacturer or authorized distributors?
All MMSZ5234BT1 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 MMSZ5234BT1 meets industry standards.
7.What is the process for return or replacement of MMSZ5234BT1?
All MMSZ5234BT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5234BT1, 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 MMSZ5234BT1 part is unused and in its original packaging.
Return procedure for MMSZ5234BT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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