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Diodes Incorporated MMSZ5231BS-7-F
- Part No.:
- MMSZ5231BS-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MMSZ5231BS-7-F.pdf
- Description:
- DIODE ZENER 5.1V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:1,008
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Product details
Overview
MMSZ5231BS-7-F from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 5.1 V (4.85–5.36 V range), 200 mW power dissipation, and 17 Ω zener impedance at 20 mA test current. It operates from −65 °C to +150 °C and is used for precision voltage regulation and reference in low-power analog circuits, such as sensor biasing and ADC reference stabilization.
For engineers reviewing the MMSZ5231BS-7-F datasheet, MMSZ5231BS-7-F pinout, MMSZ5231BS-7-F application, or MMSZ5231BS-7-F equivalent, key selection criteria include zener voltage tolerance, dynamic impedance at specified test current, thermal resistance (625 °C/W), reverse leakage at rated voltage (5 µA @ 2.0 V), and SOD-323 package compatibility with high-density PCB layouts.
Technical Context
This device employs planar die construction for stable breakdown characteristics and low parameter drift over temperature. Its SOD-323 package supports automated placement and reflow soldering, with cathode band polarity marking and matte tin-plated Alloy 42 leads meeting MIL-STD-202 solderability requirements.
The zener operates under controlled pulse conditions (short duration) to minimize self-heating effects during testing. Electrical parameters-including VZ, IZT, ZZT, and IR-are specified at TA = +25 °C unless noted, and derating follows the published power curve (Fig. 1) above 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nominal) | 5.1 V - precise DC reference point for low-current regulation and feedback networks |
| Zener Voltage Range | 4.85–5.36 V @ IZT = 20 mA - ensures ±5% tolerance compliance for stable reference design |
| Power Dissipation | 200 mW - defines maximum continuous DC power handling on FR-4 board with recommended pad layout |
| Zener Impedance | 17 Ω @ IZT = 20 mA - indicates low AC impedance for effective ripple suppression in reference paths |
| Reverse Leakage Current | 5.0 µA @ VR = 2.0 V - confirms minimal error contribution in high-impedance bias networks |
| Thermal Resistance | 625 °C/W - quantifies junction-to-ambient rise per watt; critical for thermal margin in enclosed designs |
| Operating Temperature | −65 °C to +150 °C - supports industrial and automotive under-hood applications without derating loss |
Pinout & Package
Package: SOD-323 - ultra-small plastic surface-mount case (2.30–2.70 mm length, 1.20–1.40 mm width, 0.25–0.35 mm thickness), UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode bias reference | Connected to lower potential side in reverse-biased regulation configuration |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; supplies regulated voltage when reverse biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable breakdown voltage and low long-term drift in voltage reference circuits |
| SOD-323 package footprint | Enables high-density routing on space-constrained PCBs while maintaining thermal performance |
| Lead-free & RoHS-compliant plating | Matte tin finish over Alloy 42 leadframe meets global environmental compliance without solderability compromise |
| Low zener impedance (17 Ω) | Minimizes output voltage variation under load transients in precision analog supply rails |
| Halogen- and antimony-free "Green" status | Meets strict Br/Cl/Sb ppm limits (<900/1500/1000 ppm respectively) for eco-sensitive end equipment |
Applications
| Industrial Sensor Signal Conditioning | Portable Device Power Rail Clamping |
|---|---|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in factory automation modules. IC Role / Device Role / Timing Role: Zener diode providing fixed 5.1 V reference to op-amp bias network. Use Value: Maintains <±0.5% reference stability across −40 °C to +85 °C ambient, reducing sensor offset drift. |
Use Scenario: Protecting 3.3 V microcontroller I/O pins from ESD-induced overvoltage during USB hot-plug events. IC Role / Device Role / Timing Role: Low-capacitance (≈30 pF) shunt clamp limiting transient voltage to ≤5.36 V. Use Value: Absorbs 200 mW peak pulse energy without degradation, preserving signal integrity in battery-powered devices. |
| Medical Wearable Battery Monitoring | Automotive Cabin Control Panel Reference |
Use Scenario: Generating accurate threshold voltage for lithium-ion cell voltage detection in fitness trackers. IC Role / Device Role / Timing Role: Precision 5.1 V zener feeding comparator input in low-quiescent-current monitoring circuit. Use Value: Delivers 5 µA max reverse leakage at 2 V, enabling nanoamp-level sleep-mode current budgets. |
Use Scenario: Supplying stable reference to analog-to-digital converter measuring HVAC actuator position feedback. IC Role / Device Role / Timing Role: Temperature-stable zener operating across −40 °C to +125 °C ambient range. Use Value: Maintains ≤5.36 V upper limit under full automotive thermal stress, ensuring ADC code accuracy. |
Availability
MMSZ5231BS-7-F is available at Aetrix Electronics and suitable for industrial sensor conditioning, portable device clamping, medical wearable monitoring, and automotive cabin control applications requiring stable component supply and full RoHS/Green compliance.
Supply support for MMSZ5231BS-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This part belongs to the MMSZ52xxBS series of general-purpose Zener diodes designed specifically for compact, high-reliability voltage reference and regulation in space-constrained consumer, industrial, and automotive electronics.
FAQ
What is the maximum reverse leakage current for MMSZ5231BS-7-F at 2.0 V?
The maximum reverse leakage current is 5.0 µA at VR = 2.0 V and TA = +25 °C, as specified in the Electrical Characteristics table. This value remains stable up to +125 °C ambient, with typical leakage increasing to ≈12 µA at elevated temperature per characterization curves in DS31038.
Can MMSZ5231BS-7-F be used in place of a 5 V TTL logic clamp?
No-it is not rated for fast transient suppression like TVS diodes. With 30 pF capacitance and 17 Ω dynamic impedance, it responds too slowly for ESD pulses. Its role is steady-state voltage regulation, not surge clamping; use dedicated TVS devices (e.g., DZ23C5V1) for logic line protection.
Is the SOD-323 package compatible with standard reflow profiles?
Yes-the device is qualified for lead-free reflow per J-STD-020D Level 1 moisture sensitivity. Recommended peak temperature is 260 °C for ≤10 seconds, with ramp rates matching IPC/JEDEC J-STD-020 guidelines. Pad layout per AP02001 ensures optimal thermal transfer and solder joint reliability.
How does thermal derating affect power handling above 25 °C?
Power dissipation must be linearly derated above +25 °C ambient at 0.32 mW/°C (200 mW ÷ 625 °C/W), reaching zero at +175 °C. At +85 °C ambient, maximum allowable power drops to 128 mW-verified by Fig. 1 in DS31038 and validated on standard FR-4 with AP02001 pad geometry.
MMSZ5231BS-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 2 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:
- SOD-323
MMSZ5231BS-7-F FAQ
1.How can I place an order for MMSZ5231BS-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5231BS-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 MMSZ5231BS-7-F reliable?
The price and inventory of MMSZ5231BS-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 MMSZ5231BS-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5231BS-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5231BS-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5231BS-7-F?
MMSZ5231BS-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5231BS-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 MMSZ5231BS-7-F?
For technical support, including MMSZ5231BS-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5231BS-7-F requirements.
6.How does Aetrix verify that MMSZ5231BS-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5231BS-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 MMSZ5231BS-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5231BS-7-F?
All MMSZ5231BS-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5231BS-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 MMSZ5231BS-7-F part is unused and in its original packaging.
Return procedure for MMSZ5231BS-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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