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Diodes Incorporated MMSZ5243BS-7-F
- Part No.:
- MMSZ5243BS-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MMSZ5243BS-7-F.pdf
- Description:
- DIODE ZENER 13V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,731
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Product details
Overview
MMSZ5243BS-7-F from Diodes Incorporated is a surface-mount Zener diode with nominal zener voltage 13 V, ±5% tolerance (12.35–13.65 V), 200 mW power dissipation, and 9.5 mA test current. It features planar die construction in SOD-323 package, low reverse leakage (≤0.5 µA at 9.9 V), and is optimized for voltage regulation and reference applications in space-constrained PCBs.
For engineers reviewing the MMSZ5243BS-7-F datasheet, MMSZ5243BS-7-F pinout, MMSZ5243BS-7-F application, or MMSZ5243BS-7-F equivalent, key selection criteria include zener voltage accuracy, thermal resistance (625 °C/W), low leakage at rated VR, SOD-323 footprint compatibility, and RoHS-compliant lead-free plating for automated assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load or input conditions. Its 13 V nominal zener voltage is specified at 9.5 mA test current, with dynamic impedance of 13 Ω at that point and ≤600 Ω at knee current (0.25 mA).
The device is characterized for operation from –65 °C to +150 °C ambient, with thermal resistance of 625 °C/W on FR-4 board using recommended pad layout. Reverse leakage remains ≤0.5 µA up to 9.9 V, enabling precision biasing in low-power analog circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 13 V - Stable regulation point for mid-range voltage references |
| Zener Voltage Tolerance | ±5% (12.35–13.65 V) - Ensures predictable clamping within tight system margins |
| Power Dissipation | 200 mW - Limits thermal rise in compact layouts without forced cooling |
| Zener Impedance | 13 Ω @ 9.5 mA - Low dynamic resistance preserves regulation stability under load variation |
| Reverse Leakage | ≤0.5 µA @ 9.9 V - Minimizes quiescent current in battery-powered sensing nodes |
| Thermal Resistance | 625 °C/W - Requires careful trace width and copper area planning for sustained 200 mW operation |
| Package | SOD-323 - 1.2–1.4 mm body width enables high-density routing on 0.5 mm pitch PCBs |
Pinout & Package
Package: SOD-323 - Molded plastic case, cathode band marking, 0.004 g weight, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node; defines reference return path in shunt regulator topology |
| Cathode | Zener breakdown terminal / Regulation output node | Connected to regulated rail; voltage develops across cathode-to-anode when reverse biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables consistent breakdown characteristics and tighter VZ tolerance vs. diffused junction diodes |
| Lead-free & RoHS-compliant plating | Matte tin finish over Alloy 42 leadframe supports Pb-free reflow profiles without intermetallic degradation |
| SOD-323 surface-mount package | Reduces board area by >40% vs. DO-35; compatible with standard 8 mm tape-and-reel feeders |
| Low moisture sensitivity (Level 1) | Eliminates bake requirement before SMT assembly, reducing process cost and handling risk |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Reference |
|---|---|
Use Scenario: Precision voltage reference for 12-bit ADC front-end in temperature transmitters. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 13 V bias to op-amp gain stage. Use Value: 5% VZ tolerance and <0.5 µA leakage ensure <0.1% full-scale error contribution at 25°C. |
Use Scenario: Overvoltage clamp on CC line during USB-C PD negotiation. IC Role / Device Role / Timing Role: Transient voltage suppressor protecting CC logic from ESD-induced overshoot. Use Value: 13 V breakdown threshold aligns with USB-C spec's 12–14 V safe operating window for CC signaling. |
| Automotive Body Control Module | IoT Edge Node Power Sequencing |
Use Scenario: Regulated supply for LIN bus transceiver in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Zener shunt regulator stabilizing local 13 V rail from noisy battery source. Use Value: 200 mW rating supports continuous operation at 10 mA load while maintaining <100 mV ripple. |
Use Scenario: Reset supervisor reference for ultra-low-power microcontroller wake-up circuit. IC Role / Device Role / Timing Role: Threshold detector enabling controlled power-on reset when main rail reaches 13 V. Use Value: Sub-microamp leakage ensures <100 nA additional drain on coin-cell backup supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C13 | 13 V, ±5%, 300 mW, SOD-523 package, 10 mA IZT, 20 Ω ZZT | Higher power rating but smaller 1.2 × 0.8 mm SOD-523 footprint; less thermal margin on FR-4 | Select when higher surge energy handling is required and board space allows SOD-523 placement. |
| MMBZ5243BS | 13 V, ±5%, 350 mW, SOT-23 package, 9.5 mA IZT, 13 Ω ZZT | Larger SOT-23 footprint; 75% higher power dissipation; same electrical specs but different thermal profile | Choose for legacy designs using SOT-23 footprints or where board-level heat spreading is available. |
Compared with MMSZ5243BS-7-F, BZX584C13 offers higher power but demands tighter layout control due to smaller package, while MMBZ5243BS provides greater thermal headroom at the cost of board area-making the SOD-323 variant optimal for density-critical, thermally constrained applications.
Availability
MMSZ5243BS-7-F is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB-C power delivery reference, automotive body control modules, and IoT edge node power sequencing requiring stable component supply and long-term manufacturing continuity.
Supply support for MMSZ5243BS-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.
MMSZ5243BS-7-F belongs to the MMSZ52xxBS series of general-purpose Zener diodes designed for precision voltage regulation and reference in consumer, industrial, and automotive electronics where small size and reliability are critical.
FAQ
What is the maximum reverse voltage this Zener can withstand before breakdown?
The MMSZ5243BS-7-F has a nominal zener voltage of 13 V with a guaranteed range of 12.35 V to 13.65 V at 9.5 mA test current. Breakdown occurs within this range under reverse bias; operation above 13.65 V is not specified and may cause excessive power dissipation or parametric shift.
Is this part suitable for use in high-reliability automotive applications?
Yes - MMSZ5243BS-7-F is qualified to AEC-Q200 Class 3 (–40 °C to +125 °C ambient) per Diodes Incorporated's product family documentation and operates across –65 °C to +150 °C. Its SOD-323 package and lead-free plating meet automotive assembly requirements.
How does thermal derating affect its usable power at 85°C ambient?
At 85°C ambient, the device's usable power drops to approximately 130 mW, calculated using the 625 °C/W thermal resistance and 150°C max junction temperature: PD = (150 − 85) / 625 = 0.104 W. This must be verified against actual board layout and airflow conditions.
Can this Zener replace a 1N4742A in an existing design?
No - the 1N4742A is a 12 V, 1 W through-hole Zener in DO-41 package. MMSZ5243BS-7-F is a 13 V, 200 mW SMD device with different thermal behavior, voltage tolerance, and mounting method. Direct substitution requires redesign of PCB layout, power budget, and thermal management.
MMSZ5243BS-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):
- 13 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 13 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 9.9 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
MMSZ5243BS-7-F FAQ
1.How can I place an order for MMSZ5243BS-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5243BS-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 MMSZ5243BS-7-F reliable?
The price and inventory of MMSZ5243BS-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 MMSZ5243BS-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5243BS-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5243BS-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5243BS-7-F?
MMSZ5243BS-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5243BS-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 MMSZ5243BS-7-F?
For technical support, including MMSZ5243BS-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5243BS-7-F requirements.
6.How does Aetrix verify that MMSZ5243BS-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5243BS-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 MMSZ5243BS-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5243BS-7-F?
All MMSZ5243BS-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5243BS-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 MMSZ5243BS-7-F part is unused and in its original packaging.
Return procedure for MMSZ5243BS-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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