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Diodes Incorporated MMSZ5250BS-7
- Part No.:
- MMSZ5250BS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
MMSZ5250BS-7.pdf
- Description:
- DIODE ZENER 20V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:45
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Product details
Overview
MMSZ5250BS-7 from Diodes Incorporated is a surface-mount 20 V Zener diode in SOD-323 package, rated for 200 mW power dissipation, with nominal Zener voltage 20 V (19.0–21.0 V), test current 6.2 mA, and maximum Zener impedance 25 Ω at IZT; used for precision voltage regulation and reference in low-power analog circuits.
For engineers reviewing the MMSZ5250BS-7 datasheet, MMSZ5250BS-7 pinout, MMSZ5250BS-7 application, or MMSZ5250BS-7 equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance at specified test current, reverse leakage at VR = 15 V, thermal resistance (625 °C/W), and SOD-323 footprint compatibility with automated PCB assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across load terminals under varying current conditions. Its planar die construction ensures consistent breakdown characteristics and low leakage (<0.1 µA at VR = 15 V).
Designed for general-purpose voltage referencing and overvoltage clamping, it delivers 20 V regulation with ±5% tolerance and exhibits 25 Ω dynamic impedance at 6.2 mA test current - critical for minimizing output variation in feedback networks and sensor biasing circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V nominal (19.0–21.0 V range); defines regulated output voltage under 6.2 mA test current. |
| Power Dissipation (PD) | 200 mW; limits continuous operating current to ~10 mA at 20 V to avoid thermal runaway on FR-4 board. |
| Zener Impedance (ZZT) | 25 Ω at IZT = 6.2 mA; determines regulation stiffness - lower value yields smaller output voltage shift with load current change. |
| Reverse Leakage (IR) | ≤0.1 µA at VR = 15 V; ensures minimal parasitic current in high-impedance reference nodes. |
| Thermal Resistance (RθJA) | 625 °C/W; indicates junction-to-ambient temperature rise per watt - requires derating above +25°C ambient. |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA; relevant for polarity verification and ESD protection path design. |
Pinout & Package
Package: SOD-323 - ultra-small plastic surface-mount case (2.3–2.7 mm length, 1.2–1.4 mm width, 0.25–0.35 mm thickness), cathode indicated by band, compatible with reflow soldering and automated pick-and-place.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node; reverse-biased operation places cathode at higher potential for regulation. |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; supplies regulated 20 V when reverse-biased and current ≥6.2 mA flows through external series resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight Zener voltage distribution and repeatable breakdown characteristics across production lots. |
| SOD-323 package | Enables high-density PCB layout and compatibility with standard 0805-class pick-and-place equipment. |
| Lead-free & RoHS compliant | Meets EU Directive 2011/65/EU with matte tin plating; eliminates lead contamination risk in end-product recycling. |
| Halogen- and antimony-free | Contains <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - satisfies "Green" device requirements for eco-sensitive applications. |
Applications
| Industrial Sensor Signal Conditioning | Low-Power Microcontroller Voltage Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Zener diode provides fixed 20 V reference for op-amp gain-setting and ADC reference scaling. Use Value: Maintains ±0.5% reference stability over -40°C to +85°C due to low tempco and 25 Ω ZZT, reducing calibration drift. |
Use Scenario: Generating precise 20 V bias for internal DAC reference in battery-powered IoT edge nodes. IC Role / Device Role / Timing Role: Functions as shunt regulator feeding low-current LDO input, enabling clean 3.3 V rail generation. Use Value: Draws only 0.1 µA leakage at 15 V, preserving battery life while delivering stable reference under pulsed load conditions. |
| USB-C Power Negotiation Clamp | Automotive Body Control Module Protection |
Use Scenario: Clamping CC line voltage during USB PD communication handshake to prevent controller overvoltage. IC Role / Device Role / Timing Role: Acts as transient voltage clamp limiting CC pin to ≤20 V during fault events. Use Value: Fast response to overvoltage transients (ns-scale) with 200 mW rating sufficient for short-duration PD negotiation spikes. |
Use Scenario: Protecting LIN bus transceiver supply pins against load-dump-induced surges in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Shunt regulator absorbs excess energy during 24 V surge events, holding downstream IC supply within safe margin. Use Value: 625 °C/W RθJA allows predictable thermal behavior on compact BCM PCBs without heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C20 | Same 20 V nominal Zener, but SOD-523 package (smaller footprint), 300 mW PD, 30 Ω ZZT at 5 mA. | Higher power handling supports higher current clamping; smaller SOD-523 may limit thermal relief on dense boards. | Prefer when board space is constrained and >200 mW dissipation is required; verify pad layout compatibility. |
| MMBZ5250BS | Same electrical specs (20 V, 6.2 mA, 25 Ω), but SOT-23 package - larger, 3-pin case with anode/cathode/emitter pinout (cathode = pin 2). | Requires different land pattern and manual or semi-automated placement; better thermal performance (RθJA ≈ 300 °C/W). | Choose when thermal management is critical and SOT-23 footprint is already standardized in design. |
Compared with BZX584C20 and MMBZ5250BS, MMSZ5250BS-7 offers optimal balance of SOD-323 miniaturization, 200 mW rating, and 25 Ω impedance - ideal for space-constrained, low-power voltage reference designs where thermal mass is managed via PCB copper area.
Availability
MMSZ5250BS-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, low-power microcontroller voltage reference, and USB-C power negotiation clamp applications requiring stable component supply and full RoHS compliance.
Supply support for MMSZ5250BS-7 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, serving automotive, industrial, computing, and consumer markets with high-reliability components.
MMSZ5250BS-7 belongs to the MMSZ52xxBS Zener diode family, engineered for general-purpose voltage regulation in space-constrained, automated-assembly environments - emphasizing consistency, green compliance, and SOD-323 manufacturability.
FAQ
What is the maximum reverse leakage current for MMSZ5250BS-7 at 15 V?
The maximum reverse leakage current is 0.1 µA at VR = 15 V and TA = +25°C, as specified in the Electrical Characteristics table. This low leakage ensures minimal error in high-impedance reference circuits and preserves battery life in always-on applications.
Can MMSZ5250BS-7 be used in place of a 20 V Zener in a linear regulator feedback network?
Yes - its 20 V nominal Zener voltage, ±5% tolerance, and 25 Ω dynamic impedance make it suitable for feedback node referencing in adjustable linear regulators. Ensure series resistor limits current to 6.2 mA minimum under worst-case input conditions to maintain regulation.
Is the SOD-323 package of MMSZ5250BS-7 compatible with standard reflow profiles?
Yes - the device is qualified for lead-free reflow per J-STD-020D Level 1 moisture sensitivity and uses matte tin plating compatible with standard Pb-free soldering profiles (peak 260°C). Recommended pad layout is documented in Diodes AP02001.
How does thermal derating affect MMSZ5250BS-7's usable power at 85°C ambient?
At TA = 85°C, power dissipation must be derated to 125 mW using the curve in Figure 1 (PD = 200 mW × [1 − (85−25)/150]). This corresponds to max Zener current of ~6.25 mA - sufficient for reference use but insufficient for high-current clamping without additional thermal relief.
MMSZ5250BS-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MMSZ5250BS-7 FAQ
1.How can I place an order for MMSZ5250BS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5250BS-7 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 MMSZ5250BS-7 reliable?
The price and inventory of MMSZ5250BS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5250BS-7 is usually 5 days.
3.What payment methods are accepted for MMSZ5250BS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5250BS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5250BS-7?
MMSZ5250BS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5250BS-7 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 MMSZ5250BS-7?
For technical support, including MMSZ5250BS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5250BS-7 requirements.
6.How does Aetrix verify that MMSZ5250BS-7 is sourced from the original manufacturer or authorized distributors?
All MMSZ5250BS-7 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 MMSZ5250BS-7 meets industry standards.
7.What is the process for return or replacement of MMSZ5250BS-7?
All MMSZ5250BS-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5250BS-7, 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 MMSZ5250BS-7 part is unused and in its original packaging.
Return procedure for MMSZ5250BS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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