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Diodes Incorporated MMSZ5258BS-7
- Part No.:
- MMSZ5258BS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
MMSZ5258BS-7.pdf
- Description:
- DIODE ZENER 36V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2
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Product details
Overview
MMSZ5258BS-7 from Diodes Incorporated is a surface-mount 36 V Zener diode in SOD-323 package, rated for 200 mW power dissipation, 70 Ω maximum zener impedance at 3.4 mA test current, and 0.1 µA reverse leakage at 27 V, used for precision voltage regulation and reference in low-power analog circuits.
For engineers reviewing the MMSZ5258BS-7 datasheet, MMSZ5258BS-7 pinout, MMSZ5258BS-7 application, or MMSZ5258BS-7 equivalent, key selection criteria include nominal zener voltage tolerance (±5%), thermal resistance (625 °C/W), cathode-band polarity marking, JEDEC-compliant SOD-323 footprint, and RoHS/halogen-free compliance for consumer and industrial PCB designs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 36 V reference across varying load currents, with specified test conditions at 3.4 mA and characterized up to 150 °C junction temperature. Its planar die construction ensures consistent voltage regulation and low dynamic impedance under pulse and DC bias.
The device exhibits 700 Ω maximum knee impedance at 0.25 mA and 0.1 µA reverse leakage at VR = 27 V, confirming tight regulation performance in low-current sensing and feedback paths. Its SOD-323 package supports automated placement and reflow soldering per J-STD-020D Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 36 V - precise regulation point for feedback networks and voltage references |
| Zener Voltage Range | 34.2–37.8 V - ±5% tolerance ensures predictable clamping in supply rails |
| Test Current (IZT) | 3.4 mA - standard bias condition for measuring nominal VZ and ZZT |
| Zener Impedance (ZZT) | 70 Ω max - low dynamic resistance maintains regulation stability under load variation |
| Power Dissipation (PD) | 200 mW - limits continuous current to ~5.6 mA at 36 V for thermal safety on FR-4 PCB |
| Reverse Leakage (IR) | 0.1 µA @ 27 V - negligible error contribution in high-impedance reference dividers |
| Thermal Resistance (RθJA) | 625 °C/W - defines junction-to-ambient rise under full power on standard pad layout |
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 identified by band marking, compatible with automated pick-and-place and reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node; forms regulated output when cathode is biased above anode |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; supplies stable 36 V relative to anode in reverse-biased operation |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable breakdown characteristics and long-term parameter stability over temperature |
| SOD-323 package | Enables high-density PCB layouts and compatibility with 0.5 mm pitch reflow profiles |
| Lead-free & RoHS compliant | Fulfills EU Directive 2011/65/EU requirements without compromising solderability or reliability |
| Halogen- and antimony-free | Meets "Green" definition: Br < 900 ppm, Cl < 900 ppm, Br+Cl < 1500 ppm, Sb < 1000 ppm |
| Moisture sensitivity Level 1 | Eliminates bake requirement prior to assembly-reduces manufacturing overhead |
Applications
| Power Supply Feedback | Overvoltage Protection |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback or buck converter feedback loops using optocoupler-coupled TL431 alternatives. IC Role / Device Role / Timing Role: Zener reference element providing stable 36 V threshold for error amplifier biasing and loop compensation. Use Value: Tight ±5% VZ tolerance and low 70 Ω ZZT minimize output drift across line/load/temperature variations. |
Use Scenario: Clamping transient surges on 24 V industrial I/O lines to prevent damage to downstream logic inputs. IC Role / Device Role / Timing Role: Standalone shunt protector absorbing energy above 36 V while limiting peak voltage to safe levels. Use Value: 200 mW rating allows brief surge handling; 0.1 µA leakage avoids loading sensitive sensor outputs during normal operation. |
| Voltage Reference | Signal Level Shifting |
|
Use Scenario: Generating precision bias points for op-amp input stages or ADC reference buffers in battery-powered instrumentation. IC Role / Device Role / Timing Role: Low-current voltage reference source delivering stable 36 V for scaling or offsetting analog signals. Use Value: Sub-microampere leakage and 625 °C/W RθJA enable stable operation even in thermally constrained enclosures. |
Use Scenario: Translating 3.3 V logic signals to higher-voltage domains (e.g., 36 V) for driving external relays or solenoids via level-shifting interface. IC Role / Device Role / Timing Role: Cathode-referenced clamp defining upper rail for open-drain driver output stage. Use Value: Fast response to overvoltage events and defined 36 V ceiling ensure reliable interfacing without additional active circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-C36 (Nexperia) | Same 36 V nominal, ±5% tolerance, but rated at 300 mW and uses SOD-323 package with different thermal derating curve. | Higher power rating suits higher-current clamping; requires updated thermal layout verification. | Select when >200 mW surge energy absorption is required and board space permits same footprint. |
| MMBZ5258BS (Diodes Inc.) | Identical electrical specs but in SOT-23 package-larger footprint, lower RθJA (400 °C/W), and higher 350 mW rating. | Improved thermal performance enables sustained operation at higher ambient temperatures. | Choose for elevated ambient environments (>85 °C) where SOD-323 thermal limits may be exceeded. |
Compared with BZX384-C36 and MMBZ5258BS, MMSZ5258BS-7 offers optimal balance of miniaturization, certified green compliance, and sufficient power handling for space-constrained low-power regulation-making it preferred for portable and high-density PCBs where thermal margin is adequate.
Availability
MMSZ5258BS-7 is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, voltage reference, and signal level shifting requiring stable component supply and RoHS-compliant sourcing.
Supply support for MMSZ5258BS-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.
MMSZ5258BS-7 belongs to the MMSZ52xxBS series of general-purpose Zener diodes designed for precision voltage regulation and clamping in compact, cost-sensitive consumer, computing, and industrial electronics.
FAQ
What is the maximum continuous reverse current for MMSZ5258BS-7 at 25°C?
The device is rated for 200 mW total power dissipation. At its nominal 36 V zener voltage, this corresponds to a maximum continuous reverse current of approximately 5.6 mA (200 mW ÷ 36 V). Operation beyond this limit risks exceeding junction temperature limits unless derated per Figure 1 in DS31038 Rev. 13-2.
Does MMSZ5258BS-7 have a specified capacitance value?
No capacitance specification is provided in the official datasheet DS31038. Figure 4 shows typical total capacitance vs. nominal zener voltage for the series, indicating ~1.5 pF for 36 V devices at 0 V bias and 1 MHz, but this is not a guaranteed parameter and should not be used for timing-critical AC coupling applications.
Can MMSZ5258BS-7 be used in place of a 33 V Zener like MMSZ5257BS?
No-it is not a direct substitute. MMSZ5257BS has nominal 33 V (31.35–34.65 V range), while MMSZ5258BS is 36 V (34.2–37.8 V). Using it in a 33 V feedback path would raise regulated output by ~3 V, potentially damaging downstream components. Always match nominal VZ within system tolerance bands.
Is the SOD-323 package of MMSZ5258BS-7 compatible with standard reflow profiles?
Yes-the device is qualified for lead-free reflow per J-STD-020D Level 1 moisture sensitivity, meaning it can be processed using standard Pb-free reflow profiles (peak 260°C) without baking. The recommended pad layout is documented in Diodes' AP02001 application note.
MMSZ5258BS-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MMSZ5258BS-7 FAQ
1.How can I place an order for MMSZ5258BS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5258BS-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 MMSZ5258BS-7 reliable?
The price and inventory of MMSZ5258BS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5258BS-7 is usually 5 days.
3.What payment methods are accepted for MMSZ5258BS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5258BS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5258BS-7?
MMSZ5258BS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5258BS-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 MMSZ5258BS-7?
For technical support, including MMSZ5258BS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5258BS-7 requirements.
6.How does Aetrix verify that MMSZ5258BS-7 is sourced from the original manufacturer or authorized distributors?
All MMSZ5258BS-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 MMSZ5258BS-7 meets industry standards.
7.What is the process for return or replacement of MMSZ5258BS-7?
All MMSZ5258BS-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5258BS-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 MMSZ5258BS-7 part is unused and in its original packaging.
Return procedure for MMSZ5258BS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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