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Diodes Incorporated MMSZ5246BS-7
- Part No.:
- MMSZ5246BS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MMSZ5246BS-7.pdf
- Description:
- DIODE ZENER 16V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,446
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Product details
Overview
MMSZ5246BS-7 from Diodes Incorporated is a surface-mount silicon Zener diode with a nominal zener voltage of 16 V (15.2–16.8 V range), 200 mW power dissipation, and 17 Ω zener impedance at 7.8 mA test current; it operates from −65 °C to +150 °C and is used for voltage regulation and reference in low-power analog circuits.
For engineers reviewing the MMSZ5246BS-7 datasheet, MMSZ5246BS-7 pinout, MMSZ5246BS-7 application, or MMSZ5246BS-7 equivalent, key selection criteria include zener voltage tolerance, dynamic impedance at specified test current, reverse leakage at 12 V, thermal resistance (625 °C/W), and SOD323 package compatibility with automated assembly.
Technical Context
This Zener diode employs planar die construction for stable breakdown characteristics and low leakage. Its 16 V nominal zener voltage is specified at 7.8 mA test current, with maximum zener impedance of 17 Ω at that condition and only 0.1 µA reverse leakage at 12 V.
The device is rated for 200 mW power dissipation on FR-4 PCB with recommended pad layout, derating linearly above 25 °C ambient per Fig. 1. Thermal resistance junction-to-ambient is 625 °C/W, confirming suitability for low-power, space-constrained applications where self-heating must be tightly controlled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 16 V (15.2–16.8 V range at 7.8 mA); ensures stable reference within ±5% tolerance under defined bias. |
| Power Dissipation | 200 mW at 25 °C ambient; limits continuous regulation capability in compact layouts without forced cooling. |
| Zener Impedance | 17 Ω at IZT = 7.8 mA; determines output voltage stability under small-signal load variations. |
| Reverse Leakage Current | 0.1 µA max at VR = 12 V; enables low-error biasing in high-impedance reference nodes. |
| Thermal Resistance | 625 °C/W junction-to-ambient; requires careful PCB copper area planning to avoid exceeding 150 °C junction temperature. |
| Operating Temperature | −65 °C to +150 °C; supports industrial and automotive under-hood environments without derating. |
Pinout & Package
Package: SOD323 - ultra-compact surface-mount plastic case (2.3–2.7 mm length, 1.2–1.4 mm width, 0.25–0.35 mm thickness), cathode indicated by band, lead-free matte tin plating, moisture sensitivity level 1.
| 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-biased regulation configuration. |
| Cathode | Zener breakdown terminal / voltage reference output | Provides regulated 16 V output relative to anode; marked with visible band on top surface. |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable, low-noise zener breakdown with minimal parameter drift over time and temperature. |
| SOD323 package footprint | Enables high-density PCB layouts and compatibility with standard 0805-sized pick-and-place equipment. |
| Lead-free & RoHS-compliant | Fully compliant with EU Directive 2011/65/EU; no intentionally added lead, halogen, or antimony. |
| Low reverse leakage (0.1 µA) | Minimizes error current in precision voltage references and high-impedance feedback networks. |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 16 V reference for LDO feedback or ADC reference buffer in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to deliver precise, temperature-stable DC reference voltage. Use Value: Enables ±0.5% reference accuracy over −40 °C to +85 °C with <0.1 µA loading error due to ultra-low leakage. |
Use Scenario: Protecting microcontroller GPIO pins from transient overvoltage during hot-plug events in USB-C accessory detection circuits. IC Role / Device Role / Timing Role: Shunt clamp limiting input voltage to 16.8 V peak to prevent ESD-induced latch-up in 3.3 V logic inputs. Use Value: Absorbs up to 200 mW surge energy without degradation, with fast response (<1 ns) due to low junction capacitance (~2 pF). |
| Signal Level Translation | Current Source Biasing |
Use Scenario: Generating 16 V bias for op-amp rail-to-rail output stage in portable audio line drivers. IC Role / Device Role / Timing Role: Zener-based shunt regulator establishing fixed headroom voltage for dual-supply op-amp operation. Use Value: Maintains regulation within ±3% across 1–10 mA load variation, supporting consistent THD performance. |
Use Scenario: Setting bias current for low-noise JFET preamplifiers in medical EEG front-ends. IC Role / Device Role / Timing Role: Precision current source formed with series resistor and 16 V zener reference. Use Value: Delivers 1% current accuracy over temperature via matched resistor and low-tempco zener voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B16,115 (Nexperia) | Same 16 V nominal, but 300 mW rating and 20 Ω ZZT; SOD323 package, 0.1 µA IR at 12 V. | Higher power margin allows use in higher-current clamping; slightly higher impedance affects regulation tightness. | Select when >200 mW surge handling is required and board layout permits identical SOD323 footprint. |
| MMBZ5246BLT1G (onsemi) | 16 V nominal, 225 mW rating, 15 Ω ZZT at 7.5 mA; SOT-23 package (larger than SOD323, different pinout). | Lower impedance improves regulation accuracy, but SOT-23 requires redesign of land pattern and pick-and-place setup. | Choose for improved dynamic regulation where PCB real estate and assembly process allow package change. |
Compared with BZX384-B16 and MMBZ5246BLT1G, MMSZ5246BS-7 offers optimal balance of ultra-small SOD323 size, 200 mW rating, and 17 Ω impedance-making it preferred for space-constrained, low-power reference designs where footprint and thermal profile are critical.
Availability
MMSZ5246BS-7 is available at Aetrix Electronics and suitable for voltage reference design, overvoltage protection, signal level translation, and current source biasing requiring stable component supply and full RoHS compliance.
Supply support for MMSZ5246BS-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, with design, manufacturing, and sales operations across Asia, Europe, and North America.
MMSZ52xxBS series belongs to Diodes' general-purpose Zener diode product line, engineered specifically for cost-sensitive, high-volume applications demanding reliable voltage regulation in miniature surface-mount packages.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The MMSZ5246BS-7 has a nominal zener voltage of 16 V, with a guaranteed breakdown range of 15.2 V to 16.8 V at 7.8 mA test current. It is not rated for reverse blocking beyond its zener region; sustained voltage above 16.8 V at significant current will exceed its 200 mW power limit and cause thermal failure.
Can this Zener diode be used in parallel for higher power handling?
No-parallel connection of Zener diodes is not recommended due to mismatch in zener voltage and dynamic impedance, leading to current hogging and thermal runaway. For higher power, select a single higher-rated device like BZX384-B16 (300 mW) or use active regulation instead.
Is the SOD323 package compatible with reflow soldering per J-STD-020?
Yes-the MMSZ5246BS-7 is qualified for standard lead-free reflow profiles (peak 260 °C), with moisture sensitivity level 1 (unlimited floor life at ≤30 °C/60% RH), and terminals are solderable per MIL-STD-202, Method 208.
How does temperature affect its zener voltage stability?
This device exhibits a positive temperature coefficient near 16 V, with typical TC of +0.07 %/°C. Over −40 °C to +125 °C, total zener voltage shift remains within ±2.5%, verified by characterization data in DS31038 Rev. 13.
MMSZ5246BS-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):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 12 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
MMSZ5246BS-7 FAQ
1.How can I place an order for MMSZ5246BS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5246BS-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 MMSZ5246BS-7 reliable?
The price and inventory of MMSZ5246BS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5246BS-7 is usually 5 days.
3.What payment methods are accepted for MMSZ5246BS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5246BS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5246BS-7?
MMSZ5246BS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5246BS-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 MMSZ5246BS-7?
For technical support, including MMSZ5246BS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5246BS-7 requirements.
6.How does Aetrix verify that MMSZ5246BS-7 is sourced from the original manufacturer or authorized distributors?
All MMSZ5246BS-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 MMSZ5246BS-7 meets industry standards.
7.What is the process for return or replacement of MMSZ5246BS-7?
All MMSZ5246BS-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5246BS-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 MMSZ5246BS-7 part is unused and in its original packaging.
Return procedure for MMSZ5246BS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5246BS-7 Tags
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