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Diodes Incorporated MMSZ5240BS-7-F
- Part No.:
- MMSZ5240BS-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MMSZ5240BS-7-F.pdf
- Description:
- DIODE ZENER 10V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:27,853
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Product details
Overview
MMSZ5240BS-7-F from Diodes Incorporated is a surface-mount 10 V Zener diode in SOD-323 package, rated for 200 mW power dissipation, 17 Ω zener impedance at 20 mA test current, and maximum 3.0 µA reverse leakage at 8.0 V. It provides precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the MMSZ5240BS-7-F datasheet, MMSZ5240BS-7-F pinout, MMSZ5240BS-7-F application, or MMSZ5240BS-7-F equivalent, key selection criteria include nominal zener voltage tolerance (±5%), thermal resistance (625 °C/W), forward voltage (0.9 V @ 10 mA), operating temperature range (–65 to +150 °C), and RoHS-compliant lead-free plating.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load or supply conditions. Its planar die construction ensures consistent breakdown characteristics and low dynamic impedance (17 Ω at IZT = 20 mA).
The device is optimized for general-purpose voltage reference and clamping in space-constrained PCB layouts. Its SOD-323 package supports automated pick-and-place assembly and meets J-STD-020D Level 1 moisture sensitivity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nominal) | 10 V - precise regulation point for biasing, reference, or clamping circuits |
| Zener Voltage Range | 9.50–10.50 V - ±5% tolerance ensures predictable performance across production lots |
| Power Dissipation | 200 mW - limits continuous current to ~20 mA at 10 V, defining safe operating area |
| Zener Impedance | 17 Ω @ 20 mA - low dynamic resistance enables stable output under small-signal load variation |
| Reverse Leakage Current | 3.0 µA @ 8.0 V - minimal off-state conduction preserves accuracy in high-impedance reference nodes |
| Forward Voltage | 0.9 V @ 10 mA - defines minimum forward bias needed for anode-cathode conduction |
| Thermal Resistance | 625 °C/W - determines junction temperature rise per milliwatt in standard FR-4 layout |
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), cathode indicated by band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-biased regulation; used as ground reference in shunt regulator |
| Cathode | Zener breakdown terminal / voltage clamp input | Connected to higher-potential rail; maintains ~10 V relative to anode when reverse biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight zener voltage distribution and repeatable breakdown characteristics across temperature |
| SOD-323 package | Enables high-density PCB placement and compatibility with standard 0805 footprint reflow profiles |
| Lead-free & RoHS compliant | Meets EU Directive 2011/65/EU with <900 ppm Br/Cl and <1000 ppm Sb - suitable for green manufacturing |
| Moisture Sensitivity Level 1 | Eliminates bake requirement prior to reflow, reducing assembly cost and handling risk |
Applications
| Low-Power Voltage Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 10 V reference for ADC biasing or op-amp feedback networks in battery-powered sensors. IC Role / Device Role / Timing Role: Shunt voltage reference maintaining fixed potential despite supply ripple or load drift. Use Value: Enables 10-bit+ measurement accuracy with <±0.5% regulation error over –40 to +85 °C ambient. |
Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 10 V in industrial control interfaces. IC Role / Device Role / Timing Role: Clamping element diverting excess energy to ground before damage threshold is reached. Use Value: Limits peak voltage to ≤10.5 V at 20 mA surge, preventing latch-up in 3.3 V or 5 V logic inputs. |
| Power Supply Feedback | Signal Level Translation |
|
Use Scenario: Setting output voltage in adjustable DC-DC converter feedback loop using TL431-compatible topology. IC Role / Device Role / Timing Role: Precision voltage divider node establishing regulated output setpoint. Use Value: Delivers ±5% initial accuracy and <10 mV drift over 1000-hour life, supporting ±1% output tolerance. |
Use Scenario: Shifting 3.3 V logic signals to 10 V levels for driving legacy analog comparators or optocouplers. IC Role / Device Role / Timing Role: Bidirectional level translator leveraging forward conduction and reverse breakdown thresholds. Use Value: Achieves clean 0→10 V transition with <100 ns propagation delay and no external bias required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C10 | Same 10 V nominal, but ±5% tolerance and 300 mW rating in SOD-523 package | Higher power handling allows 30 mA continuous operation; larger footprint requires layout revision | Select when >200 mW dissipation or improved thermal margin is required |
| MMBZ5240BLT1G | Identical electrical specs but in SOT-23 package with different marking and 3-pin configuration | Requires 3-pad layout; third pin is unused but affects routing density and solder joint reliability | Select only if existing design uses SOT-23 footprints and board rework is impractical |
Compared with BZX584-C10 and MMBZ5240BLT1G, MMSZ5240BS-7-F offers optimal balance of size, thermal performance, and compatibility with high-volume SOD-323 assembly processes-making it preferred for compact, cost-sensitive consumer and industrial designs.
Availability
MMSZ5240BS-7-F is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage clamp, and power supply feedback applications requiring stable component supply and full RoHS compliance.
Supply support for MMSZ5240BS-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 and manufacturing operations across Asia and the Americas.
This part belongs to the MMSZ52xxBS series of surface-mount Zener diodes, engineered specifically for high-reliability, low-profile voltage regulation in automated SMT production environments.
FAQ
What is the maximum reverse voltage that can be continuously applied without breakdown?
The MMSZ5240BS-7-F begins controlled breakdown at approximately 9.5 V and reaches nominal regulation at 10 V. Applying ≥8.0 V reverse bias results in measurable leakage (≤3.0 µA), but sustained operation below 9.5 V avoids significant current flow. Full regulation occurs only above the specified knee voltage.
Can this Zener diode be used in forward-biased mode like a standard diode?
Yes - it exhibits 0.9 V forward voltage at 10 mA, matching typical silicon diode behavior. However, its forward characteristics are not characterized beyond this single point; for dedicated rectification or switching, purpose-built signal diodes (e.g., 1N4148) are recommended.
How does the 625 °C/W thermal resistance impact real-world PCB layout?
This value assumes mounting on a standard FR-4 board with Diodes Incorporated's recommended pad layout (AP02001). Without copper pour or thermal vias, junction temperature rises ~625 °C per watt - so at 200 mW, ΔT ≈ 125 °C above ambient. Layout must ensure adequate copper area to avoid exceeding 150 °C max junction temperature.
Is the SOD-323 package compatible with standard 0805 pick-and-place equipment?
Yes - the SOD-323 (1.7 × 1.3 mm) falls within the capability envelope of most Class II and III placement systems. Its symmetrical geometry and matte tin finish ensure reliable vacuum nozzle pickup and accurate placement at speeds up to 12,000 cph, provided feeder tape pitch and vision calibration match JEDEC standards.
MMSZ5240BS-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):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 8 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
MMSZ5240BS-7-F FAQ
1.How can I place an order for MMSZ5240BS-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5240BS-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 MMSZ5240BS-7-F reliable?
The price and inventory of MMSZ5240BS-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 MMSZ5240BS-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5240BS-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5240BS-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5240BS-7-F?
MMSZ5240BS-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5240BS-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 MMSZ5240BS-7-F?
For technical support, including MMSZ5240BS-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5240BS-7-F requirements.
6.How does Aetrix verify that MMSZ5240BS-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5240BS-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 MMSZ5240BS-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5240BS-7-F?
All MMSZ5240BS-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5240BS-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 MMSZ5240BS-7-F part is unused and in its original packaging.
Return procedure for MMSZ5240BS-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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