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Diodes Incorporated MMSZ5250BS-7-F
- Part No.:
- MMSZ5250BS-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5250BS-7-F.pdf
- Description:
- DIODE ZENER 20V 200MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:6,812
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Product details
Overview
MMSZ5250BS-7-F 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-F datasheet, MMSZ5250BS-7-F pinout, MMSZ5250BS-7-F application, or MMSZ5250BS-7-F 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 assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load or supply conditions. It exhibits a nominal 20 V breakdown with ±5% tolerance, 25 Ω dynamic impedance at 6.2 mA test current, and ≤0.1 µA reverse leakage at 15 V reverse bias.
Designed for general-purpose voltage referencing and overvoltage clamping in space-constrained PCBs, it leverages planar die construction and lead-free matte tin plating on Alloy 42 leadframe, meeting RoHS and halogen-free "Green" requirements per Diodes Inc. specifications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V nominal, 19.0–21.0 V range at IZT = 6.2 mA - defines regulated output voltage window under standard test condition |
| Power Dissipation (PD) | 200 mW at TA = 25 °C - limits continuous power handling without heatsinking on FR-4 board |
| Zener Impedance (ZZT) | 25 Ω max at IZT = 6.2 mA - determines voltage regulation stiffness under small-signal AC variation |
| Reverse Leakage (IR) | ≤0.1 µA at VR = 15 V - ensures minimal parasitic current in standby or high-impedance bias networks |
| Thermal Resistance (RθJA) | 625 °C/W - quantifies junction-to-ambient temperature rise per watt; requires layout-aware thermal design |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - relevant for polarity verification and forward conduction checks during testing |
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 marked by band, moisture sensitivity level 1, weight ≈ 0.004 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in Zener configuration; used for polarity identification and circuit grounding reference |
| Cathode | Reverse breakdown terminal / regulated output node | Connected to higher-potential side; delivers stabilized 20 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables tight Zener voltage tolerance and repeatable breakdown characteristics across production lots |
| SOD-323 package | Supports high-density PCB layouts and compatibility with standard 0805-class pick-and-place equipment |
| Lead-free & RoHS compliant | Meets EU Directive 2011/65/EU with <900 ppm Br/Cl and <1000 ppm Sb - suitable for green manufacturing programs |
| Low reverse leakage | ≤0.1 µA at 15 V enables use in battery-powered sensor biasing and low-current reference circuits |
Applications
| Industrial Sensor Signal Conditioning | USB Peripheral Voltage Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Zener diode providing 20 V reference for op-amp biasing and ADC reference scaling. Use Value: Tight 5% voltage tolerance and low 25 Ω impedance ensure <0.5% full-scale error contribution in 12-bit measurement systems. |
Use Scenario: Clamping VBUS transient spikes in USB 2.0 downstream ports of embedded host controllers. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as overvoltage protection element between VBUS and ground. Use Value: 200 mW rating and fast response enable absorption of short-duration 15–20 V surges without latch-up or degradation. |
| IoT Node Power Rail Monitoring | Automotive Body Control Module Biasing |
Use Scenario: Generating stable 20 V auxiliary rail from 24 V vehicle battery for microcontroller reset supervisor ICs. IC Role / Device Role / Timing Role: Zener-based shunt regulator feeding low-quiescent LDO input. Use Value: ≤0.1 µA leakage at 15 V minimizes standby current draw, extending coin-cell or supercap backup runtime. |
Use Scenario: Providing precise bias voltage for Hall-effect position sensor signal conditioning in door latch assemblies. IC Role / Device Role / Timing Role: Voltage reference source for differential amplifier common-mode setting. Use Value: Planar die consistency ensures <±2 mV unit-to-unit drift over -40 to +125 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C20LT1G | Same 20 V nominal, but SOD-523 package (smaller); 300 mW PD; 30 Ω ZZT at 5 mA | Higher power rating supports higher surge energy; smaller footprint demands tighter placement tolerance | Select when board space is critical and thermal margin allows SOD-523 reflow profile adaptation |
| MMBZ5250ELT1G | SOT-23 package; same 20 V rating; 350 mW PD; 22 Ω ZZT at 20 mA | Higher test current yields lower dynamic impedance but increases quiescent power consumption | Prefer for applications requiring sub-20 Ω impedance where board area permits SOT-23 mounting |
Compared with MMSZ5250BS-7-F, BZX584C20LT1G offers higher power and smaller size but looser impedance control, while MMBZ5250ELT1G delivers lower ZZT at higher bias current but occupies more PCB area - trade-offs center on thermal budget, layout density, and regulation precision.
Availability
MMSZ5250BS-7-F is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB peripheral voltage reference, IoT node power rail monitoring, and automotive body control module biasing requiring stable component supply and consistent Zener performance across production batches.
Supply support for MMSZ5250BS-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.
The MMSZ52xxBS series belongs to Diodes Inc.'s general-purpose Zener diode product line, engineered for cost-effective, reliable voltage regulation in consumer, industrial, and computing applications with strict RoHS and green compliance requirements.
FAQ
What is the maximum reverse voltage this Zener can clamp without damage?
The MMSZ5250BS-7-F is rated for 20 V nominal Zener voltage with 19.0–21.0 V tolerance at 6.2 mA. Its absolute maximum reverse voltage before destructive breakdown is not specified separately; safe operation requires staying within the 200 mW power limit - e.g., at 25 V reverse bias, current must remain below 8 mA to avoid exceeding PD.
Does this part support reflow soldering per JEDEC J-STD-020?
Yes - the SOD-323 package is qualified for lead-free reflow per JEDEC J-STD-020D, with moisture sensitivity level 1 (unlimited floor life at ≤30 °C/60% RH), and terminals are solderable per MIL-STD-202, Method 208 using standard Pb-free paste profiles.
How does its Zener impedance affect voltage regulation accuracy?
With ZZT = 25 Ω max at 6.2 mA, a 1 mA change in load current causes up to 25 mV output shift - critical in precision references. For <10 mV regulation error, load current variation must be kept within ±0.4 mA, or supplemental buffering used.
Is this diode suitable for automotive under-hood applications?
No - while it operates from –65 to +150 °C, it is not AEC-Q200 qualified. Its qualification covers commercial/industrial use only; automotive under-hood deployment requires AEC-Q200-tested alternatives such as the BZX84-C20LT1G or SMAZ20.
MMSZ5250BS-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 15 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ5250BS-7-F FAQ
1.How can I place an order for MMSZ5250BS-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5250BS-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 MMSZ5250BS-7-F reliable?
The price and inventory of MMSZ5250BS-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 MMSZ5250BS-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5250BS-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5250BS-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5250BS-7-F?
MMSZ5250BS-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5250BS-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 MMSZ5250BS-7-F?
For technical support, including MMSZ5250BS-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5250BS-7-F requirements.
6.How does Aetrix verify that MMSZ5250BS-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5250BS-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 MMSZ5250BS-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5250BS-7-F?
All MMSZ5250BS-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5250BS-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 MMSZ5250BS-7-F part is unused and in its original packaging.
Return procedure for MMSZ5250BS-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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