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Diodes Incorporated MMSZ5245BS-7
- Part No.:
- MMSZ5245BS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MMSZ5245BS-7.pdf
- Description:
- DIODE ZENER 15V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,261
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Product details
Overview
MMSZ5245BS-7 from Diodes Incorporated is a surface-mount 15 V Zener diode in SOD-323 package, rated for 200 mW power dissipation, with nominal Zener voltage 15 V (min 14.25 V, max 15.75 V) at 8.5 mA test current, 16 Ω dynamic impedance at test current, and only 0.1 µA reverse leakage at 11 V, used for precision voltage regulation and reference in low-power analog circuits.
For engineers reviewing the MMSZ5245BS-7 datasheet, MMSZ5245BS-7 pinout, MMSZ5245BS-7 application, or MMSZ5245BS-7 equivalent, this part serves as a stable, low-leakage, RoHS-compliant 15 V reference in space-constrained PCBs where thermal resistance of 625 °C/W and ±5% voltage tolerance are design-critical.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage across its terminals under varying load and supply conditions. Its planar die construction ensures consistent voltage regulation and low temperature coefficient performance over -65°C to +150°C operating range.
Designed for general-purpose voltage clamping and regulation, it delivers 15 V nominal output with tight 5% tolerance, low 16 Ω Zener impedance at 8.5 mA, and sub-µA leakage at VR = 11 V - enabling accurate biasing in sensor interfaces, ADC references, and power-supply feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 15 V - precise reference point for voltage regulation and clamping circuits |
| Zener Voltage Range | 14.25 V to 15.75 V - ±5% tolerance ensures predictable operation in production designs |
| Test Current (IZT) | 8.5 mA - defined operating point for specified Zener voltage and impedance |
| Zener Impedance (ZZT) | 16 Ω - low dynamic resistance maintains stable voltage under small-signal load variations |
| Power Dissipation | 200 mW - limits maximum continuous reverse power in ambient conditions without derating |
| Reverse Leakage (IR) | 0.1 µA at VR = 11 V - negligible current draw preserves accuracy in high-impedance reference nodes |
| Thermal Resistance | 625 °C/W - defines junction-to-ambient temperature rise per watt; requires careful layout on FR-4 |
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 height), cathode indicated by band, compatible with automated pick-and-place and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node when used in reverse-bias regulation |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 15 V relative to anode; must be biased above anode by ≥15 V to enter regulation |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable Zener voltage distribution and long-term stability under thermal cycling |
| SOD-323 package footprint | Reduces board area by >50% vs. DO-35; supports high-density routing in portable electronics |
| Lead-free & RoHS-compliant | Meets EU Directive 2011/65/EU; matte tin plating enables reliable solder joint formation |
| Halogen- and antimony-free | Complies with green manufacturing standards (<900 ppm Br/Cl, <1000 ppm Sb) |
Applications
| ADC Reference Voltage | Power Supply Feedback |
|---|---|
Use Scenario: Providing stable reference to 12-bit SAR ADC in battery-powered IoT sensor node. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC internal conversion ladder. Use Value: 0.1 µA leakage and 16 Ω impedance minimize reference error drift and improve effective resolution. |
Use Scenario: Setting output voltage in isolated flyback converter via optocoupler feedback loop. IC Role / Device Role / Timing Role: Zener clamp defining feedback threshold at secondary-side TL431 reference input. Use Value: Tight 5% tolerance and low tempco ensure ±1.5% output regulation across industrial temperature range. |
| Overvoltage Protection | Signal Level Shifting |
Use Scenario: Clamping microcontroller I/O pins against ESD transients in automotive body control module. IC Role / Device Role / Timing Role: Low-capacitance shunt protector limiting voltage to 15 V during surge events. Use Value: Sub-µA leakage avoids loading sensitive inputs; 200 mW rating handles short-duration pulses per IEC 61000-4-2. |
Use Scenario: Biasing op-amp input stage to 15 V rail in single-supply instrumentation amplifier. IC Role / Device Role / Timing Role: DC level translator establishing common-mode voltage for differential signal conditioning. Use Value: Stable 15 V output enables accurate gain setting and reduces offset drift caused by supply variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C15 | Same 15 V nominal, but SOD-523 package (smaller); 300 mW rating; higher leakage (1 µA @ 12 V) | Better power handling but larger footprint mismatch; less suitable for legacy SOD-323 layouts | Select if board space allows SOD-523 and higher pulse robustness is needed |
| MMBZ5245BS | Identical electrical specs and SOD-323 package; same marking code H5; dual-diode variant not applicable here | No functional difference - single-diode version matches MMSZ5245BS-7 exactly | Valid drop-in replacement; verify reel packaging compatibility (MMSZ uses -7-F tape/reel) |
Compared with BZX584-C15 and MMBZ5245BS, the MMSZ5245BS-7 offers optimal balance of low leakage (0.1 µA), industry-standard SOD-323 fit, and proven reliability in high-volume consumer and industrial PCBs - making it preferred for cost-sensitive, space-constrained reference designs.
Availability
MMSZ5245BS-7 is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and power supply feedback applications requiring stable component supply, consistent parametric performance, and full RoHS compliance.
Supply support for MMSZ5245BS-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.
The MMSZ52xxBS series belongs to Diodes' general-purpose Zener diode product line, engineered for compact, low-cost voltage regulation in space-constrained and thermally sensitive applications.
FAQ
What is the maximum reverse voltage before breakdown for MMSZ5245BS-7?
The nominal Zener voltage is 15 V, with guaranteed range 14.25 V to 15.75 V at 8.5 mA test current. Breakdown begins near the lower limit; sustained operation below 14.25 V keeps the device in non-conducting state. Full regulation occurs only above ~14.5 V under typical bias conditions.
Can MMSZ5245BS-7 be used in place of a 1N4744A?
No - the 1N4744A is a 14 V, 1 W through-hole Zener in DO-41 package. MMSZ5245BS-7 is a 15 V, 200 mW SOD-323 surface-mount device. Differences in voltage, power rating, package, and thermal behavior make direct substitution unsafe without circuit redesign and layout changes.
Is MMSZ5245BS-7 suitable for use in automotive applications?
Yes - it meets AEC-Q200 stress test requirements for passive components when qualified per Diodes Inc. automotive-grade variants (e.g., MMSZ5245BS-Q). The standard MMSZ5245BS-7 is rated for -65°C to +150°C operation and widely used in non-safety-critical automotive subsystems like infotainment power rails and sensor biasing.
How does thermal derating affect MMSZ5245BS-7's power capability?
At 25°C ambient, it delivers full 200 mW. Derating begins linearly above 25°C: power drops by 0.32 mW/°C (based on RθJA = 625 °C/W), reaching zero at 150°C junction. For reliable operation at 85°C ambient, max power is reduced to ~160 mW - requiring appropriate PCB copper area per Diodes' AP02001 layout guidelines.
MMSZ5245BS-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 16 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 11 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
MMSZ5245BS-7 FAQ
1.How can I place an order for MMSZ5245BS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5245BS-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 MMSZ5245BS-7 reliable?
The price and inventory of MMSZ5245BS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5245BS-7 is usually 5 days.
3.What payment methods are accepted for MMSZ5245BS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5245BS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5245BS-7?
MMSZ5245BS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5245BS-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 MMSZ5245BS-7?
For technical support, including MMSZ5245BS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5245BS-7 requirements.
6.How does Aetrix verify that MMSZ5245BS-7 is sourced from the original manufacturer or authorized distributors?
All MMSZ5245BS-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 MMSZ5245BS-7 meets industry standards.
7.What is the process for return or replacement of MMSZ5245BS-7?
All MMSZ5245BS-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5245BS-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 MMSZ5245BS-7 part is unused and in its original packaging.
Return procedure for MMSZ5245BS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5245BS-7 Tags
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