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Diodes Incorporated MMSZ5258B-7-F
- Part No.:
- MMSZ5258B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5258B-7-F.pdf
- Description:
- DIODE ZENER 36V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:58,641
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Product details
Overview
MMSZ5258B-7-F from Diodes Incorporated is a 36 V, ±5% tolerance, 500 mW surface-mount Zener diode in SOD123 package, rated for 3.4 mA test current and 70 Ω dynamic impedance at 1 kHz, used for precision voltage regulation and reference in low-power analog circuits.
For engineers reviewing the MMSZ5258B-7-F datasheet, MMSZ5258B-7-F pinout, MMSZ5258B-7-F application, or MMSZ5258B-7-F equivalent, this device serves as a stable, AEC-Q101-qualified voltage clamp in power supply feedback paths, sensor biasing networks, and overvoltage protection stages where tight Zener voltage control and low leakage (<0.1 µA at 27 V) are required.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 36 V (34.2–37.8 V range), exhibiting a positive temperature coefficient of +0.09 %/°C per Figure 6 - enabling predictable drift compensation in temperature-stable references. Its 70 Ω impedance at IZT = 3.4 mA ensures minimal regulation error under varying load conditions.
Rated for 500 mW dissipation at TL = +75°C and 370 mW at TA = +25°C, it relies on FR-4 PCB thermal design with 1-inch copper pad (RθJA = 338 °C/W). The SOD123 package supports automated placement and reflow, with matte tin-plated Alloy 42 leads and cathode band polarity marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V nominal, 34.2–37.8 V range at IZT = 3.4 mA - defines regulated output level in shunt regulator designs |
| Power Dissipation | 370 mW @ TA = +25°C - sets maximum continuous DC power handling on standard PCB layout |
| Zener Impedance (ZZT) | 70 Ω @ f = 1 kHz, IZT = 3.4 mA - determines AC regulation stability and ripple rejection capability |
| Reverse Leakage (IR) | ≤0.1 µA @ VR = 27 V - ensures negligible current draw in standby or high-impedance bias networks |
| Thermal Resistance (RθJA) | 338 °C/W - quantifies junction-to-ambient temperature rise per watt, critical for thermal derating above +25°C |
| Operating Temperature | −65 to +150 °C - supports industrial and automotive under-hood applications without derating |
Pinout & Package
Two-terminal device in SOD123 plastic package (JEDEC DO-213AC); cathode identified by black band. Dimensions: L = 0.30 mm (lead length), D = 1.55 mm (body width), E = 2.65 mm (body length), He = 3.65 mm (height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in shunt regulation; forms return path for Zener current |
| Cathode | Reverse-biased Zener terminal / regulated output node | Connected to regulated voltage rail; clamps voltage when reverse current exceeds threshold |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use with extended temperature cycling and humidity testing |
| Green molding compound | UL 94V-0 rated, halogen- and antimony-free - meets RoHS 2 and automotive environmental compliance |
| SOD123 footprint | Compatible with industry-standard 0805-sized land pattern - enables drop-in replacement in space-constrained layouts |
| Low leakage at 27 V | ≤0.1 µA reverse current - preserves accuracy in high-impedance voltage divider or reference buffer circuits |
Applications
| Power Supply Feedback | Sensor Biasing |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or buck-derived auxiliary supplies via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting precise feedback threshold for TL431 or similar shunt regulators. Use Value: Tight 36 V tolerance (±5%) and low 70 Ω impedance ensure <±1% output regulation across line/load variations. |
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) or bridge-based pressure sensors. IC Role / Device Role / Timing Role: Low-drift voltage reference source for ratiometric measurement front-ends. Use Value: +0.09 %/°C tempco enables predictable offset correction; sub-0.1 µA leakage avoids sensor loading errors. |
| Overvoltage Clamp | Microcontroller Reset Circuit |
Use Scenario: Protecting downstream logic inputs from transient surges on 24 V industrial I/O lines. IC Role / Device Role / Timing Role: Shunt clamping device limiting voltage to safe levels during ESD or inductive kick events. Use Value: 36 V breakdown reliably clips transients above system rail while surviving 500 mW peak pulse energy per JEDEC standards. |
Use Scenario: Generating clean, temperature-stable reset signal for ARM Cortex-M microcontrollers operating from 3.3 V rails. IC Role / Device Role / Timing Role: Reference element in RC-delayed reset generator with hysteresis. Use Value: Stable 36 V Zener allows accurate scaling to 3.3 V threshold via resistor divider; −65 to +150 °C range covers full MCU operating envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C36 (Nexperia) | Same 36 V nominal, ±5% tolerance, but 300 mW rating and SOD323 package | Lower power handling limits use in >10 mA shunt applications; smaller footprint reduces thermal mass | Select when board space is constrained and power dissipation remains ≤250 mW |
| MMBZ5258BLT1G (ON Semiconductor) | Identical 36 V rating and SOD123 package, but rated 350 mW @ TA = +25°C and higher 100 Ω ZZT | Higher impedance degrades ripple rejection; lower power rating requires tighter thermal design | Prefer only if legacy BOM alignment outweighs regulation performance trade-offs |
Compared with BZX584-C36 and MMBZ5258BLT1G, MMSZ5258B-7-F delivers superior thermal robustness (370 mW vs. ≤350 mW), lower dynamic impedance (70 Ω vs. ≥100 Ω), and AEC-Q101 qualification - making it optimal for automotive and industrial systems demanding long-term voltage stability under thermal stress.
Availability
MMSZ5258B-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC analog input stages, and medical sensor signal conditioning requiring stable component supply and AEC-Q101 reliability assurance.
Supply support for MMSZ5258B-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 device belongs to the MMSZ52xxB series of general-purpose Zener diodes engineered for cost-sensitive, high-volume applications requiring reliable voltage reference and clamping in consumer, industrial, and automotive electronics.
FAQ
What is the maximum steady-state power dissipation for MMSZ5258B-7-F at +75°C ambient?
The device is rated for 500 mW power dissipation at lead temperature (TL) = +75°C, as specified in the Maximum Ratings table. This assumes proper thermal coupling to a heatsink or large copper plane; on standard FR-4 with 1-inch pad, derating begins above +25°C per Figure 1's 338 °C/W RθJA.
Does MMSZ5258B-7-F have automotive qualification?
Yes - it is explicitly qualified to AEC-Q101 standards for high-reliability automotive applications, as confirmed in the Features section of DS18010 Rev. 28-2. This includes stress testing for temperature cycling, humidity, and mechanical shock per automotive-grade requirements.
How does the temperature coefficient affect regulation accuracy over −40°C to +125°C?
Per Figure 6, MMSZ5258B exhibits +0.09 %/°C temperature coefficient. Over a 165°C span, this yields ~14.9 mV/°C × 165°C ≈ ±1.49 V total drift - or ±4.1% of 36 V nominal. For precision applications, this must be compensated via circuit design or paired with negative-coefficient devices.
Can MMSZ5258B-7-F replace MMSZ5257B in a 33 V reference design?
No - MMSZ5257B is rated 33 V (31.35–34.65 V), while MMSZ5258B is 36 V (34.2–37.8 V). Substituting increases regulated voltage by ~9%, potentially exceeding downstream IC absolute maximum ratings. Use only if circuit tolerances accommodate the +3 V shift and impedance change (58 Ω → 70 Ω).
MMSZ5258B-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 27 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-123
MMSZ5258B-7-F FAQ
1.How can I place an order for MMSZ5258B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5258B-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 MMSZ5258B-7-F reliable?
The price and inventory of MMSZ5258B-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 MMSZ5258B-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5258B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5258B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5258B-7-F?
MMSZ5258B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5258B-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 MMSZ5258B-7-F?
For technical support, including MMSZ5258B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5258B-7-F requirements.
6.How does Aetrix verify that MMSZ5258B-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5258B-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 MMSZ5258B-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5258B-7-F?
All MMSZ5258B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5258B-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 MMSZ5258B-7-F part is unused and in its original packaging.
Return procedure for MMSZ5258B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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