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Diodes Incorporated MMSZ5241B-7
- Part No.:
- MMSZ5241B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5241B-7.pdf
- Description:
- DIODE ZENER 11V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:9,079
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Product details
Overview
MMSZ5241B-7 from Diodes Incorporated is a 500mW surface-mount Zener diode with a nominal zener voltage of 11V (10.45–11.55V at 20mA), 22Ω zener impedance at test current, and 2.0µA reverse leakage at 8.4V. It uses an SOD123 package, features matte tin-plated alloy 42 leads, and is qualified to AEC-Q101 for automotive reliability. It serves as a precision voltage reference or overvoltage clamp in low-power analog and power supply feedback circuits.
For engineers reviewing the MMSZ5241B-7 datasheet, MMSZ5241B-7 pinout, MMSZ5241B-7 application, or MMSZ5241B-7 equivalent, key selection criteria include zener voltage tolerance, dynamic impedance at operating current, thermal derating behavior on FR-4 PCBs, and compliance with AEC-Q101 for automotive-grade deployment.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage regulation across varying load currents. Its 11V nominal zener voltage exhibits a temperature coefficient near +0.06%/°C (typical for this voltage range), enabling predictable drift in temperature-sensitive references.
The device delivers 370mW power dissipation at 25°C ambient and derates linearly to 500mW at 75°C lead temperature. Its SOD123 package provides 338°C/W junction-to-ambient thermal resistance on standard FR-4 layouts, supporting compact board-level voltage stabilization without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.0 V nominal, 10.45–11.55 V range at 20 mA - defines regulated output voltage under typical bias conditions |
| Power Dissipation (PD) | 370 mW at TA = 25°C - maximum continuous power on standard FR-4 layout before thermal derating applies |
| Zener Impedance (ZZT) | 22 Ω at IZT = 20 mA - determines AC regulation error and ripple rejection in feedback loops |
| Reverse Leakage (IR) | 2.0 µA at VR = 8.4 V - sets minimum quiescent current draw in high-impedance bias networks |
| Thermal Resistance (RθJA) | 338 °C/W - quantifies junction temperature rise per milliwatt on standard PCB pad layout |
| Package | SOD123 - 2-pin surface-mount outline with cathode band marking and 0.01 g mass for automated placement |
Pinout & Package
Package: SOD123 - molded plastic case with matte tin-finished alloy 42 leads, cathode band polarity marking, UL 94V-0 flammability rating, and moisture sensitivity level 1.
| 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 | Zener breakdown terminal / voltage reference output | Connected to regulated node; voltage at this pin clamps to 11V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| 500mW power rating at TL = 75°C | Enables higher transient power handling than standard 370mW rating, supporting surge-tolerant clamp designs |
| AEC-Q101 qualification | Validates reliability for automotive electronics including engine control modules and body controllers |
| Lead-free & halogen-free "Green" construction | Meets RoHS 2 and automotive ELV directives without compromising solderability or thermal performance |
| Cathode band polarity marking | Ensures unambiguous orientation during automated optical inspection and pick-and-place assembly |
Applications
| Power Supply Feedback | Overvoltage Protection |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or buck-derived auxiliary supplies. IC Role / Device Role / Timing Role: Shunt voltage reference in optocoupler feedback loop. Use Value: Maintains ±5% output accuracy over line/load/temperature with minimal external components. |
Use Scenario: Clamping transient spikes on 12V automotive sensor lines. IC Role / Device Role / Timing Role: Passive overvoltage clamp protecting downstream ADC inputs. Use Value: Limits voltage to ≤11.55V at 20mA, preventing damage to 12-bit SAR converters rated for 12V abs max. |
| Reference Voltage Source | Signal Level Translation |
Use Scenario: Generating stable 11V reference for comparator thresholds in battery monitoring ICs. IC Role / Device Role / Timing Role: Precision DC reference node for hysteresis setting. Use Value: Delivers <22Ω dynamic impedance, reducing threshold shift due to supply ripple by >80% vs. resistor-divider alone. |
Use Scenario: Biasing logic-level shifters interfacing 3.3V microcontrollers with 12V CAN transceivers. IC Role / Device Role / Timing Role: Clamp diode defining high-side logic threshold. Use Value: Provides repeatable 11V clamping point with <2µA leakage, minimizing standby current in always-on nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C11 | 11V ±5%, 300mW PD, SOD323 package, 40Ω ZZT | Lower power rating and higher impedance limit use to low-current references only | Select when board space is constrained and 300mW suffices; verify thermal margin on dense layouts |
| 1N4740A | 10V ±5%, 1W PD, DO-41 through-hole, 17Ω ZZT | Through-hole mounting and 10V nominal require PCB redesign and recalibration | Choose for legacy through-hole systems needing higher power; not drop-in compatible |
Compared with BZX584C11 and 1N4740A, MMSZ5241B-7 offers superior thermal performance in SMT layouts, tighter voltage tolerance at 20mA, and AEC-Q101 qualification-making it optimal for new automotive and industrial designs requiring surface-mount reliability and precise 11V regulation.
Availability
MMSZ5241B-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and consumer power adapter feedback circuits requiring stable component supply and AEC-Q101-compliant sourcing.
Supply support for MMSZ5241B-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 the Americas.
The MMSZ52xxB series belongs to Diodes' general-purpose Zener diode product line, engineered for cost-effective, high-reliability voltage regulation in commercial and automotive applications where precision, small size, and RoHS compliance are essential.
FAQ
What is the maximum reverse voltage that can be continuously applied to MMSZ5241B-7 without breakdown?
The absolute maximum reverse voltage before breakdown is defined by its zener voltage specification: 11.55V at 20mA test current. Applying ≥11.55V in reverse will initiate controlled breakdown. For safe non-breakdown operation, keep reverse bias below 8.4V, where leakage remains ≤2.0µA per datasheet limits.
How does thermal derating affect MMSZ5241B-7's power handling on a standard PCB?
On an FR-4 board with 1-inch copper pad, MMSZ5241B-7 dissipates 370mW at 25°C ambient but derates linearly to zero at 150°C junction temperature. Its 338°C/W RθJA means each 1°C rise above 25°C reduces usable power by ~1.1mW - critical for sustained operation in enclosed enclosures.
Is MMSZ5241B-7 suitable for use in automotive infotainment power rails?
Yes - MMSZ5241B-7 is AEC-Q101 qualified and rated for −65°C to +150°C operation. Its 11V zener voltage stabilizes 12V rail monitors and protects audio codec bias networks against load dump transients up to ISO 7637-2 Pulse 5a levels when combined with appropriate series resistance.
Can MMSZ5241B-7 replace MMSZ5242B (12V) in a feedback circuit without redesign?
No - substituting the 11V MMSZ5241B-7 for the 12V MMSZ5242B alters the regulated output voltage by ~9%. This changes feedback ratio requirements and may cause overvoltage or undervoltage shutdown. Recalculate compensation network values and verify loop stability before substitution.
MMSZ5241B-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 22 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 8.4 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
MMSZ5241B-7 FAQ
1.How can I place an order for MMSZ5241B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5241B-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 MMSZ5241B-7 reliable?
The price and inventory of MMSZ5241B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5241B-7 is usually 5 days.
3.What payment methods are accepted for MMSZ5241B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5241B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5241B-7?
MMSZ5241B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5241B-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 MMSZ5241B-7?
For technical support, including MMSZ5241B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5241B-7 requirements.
6.How does Aetrix verify that MMSZ5241B-7 is sourced from the original manufacturer or authorized distributors?
All MMSZ5241B-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 MMSZ5241B-7 meets industry standards.
7.What is the process for return or replacement of MMSZ5241B-7?
All MMSZ5241B-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5241B-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 MMSZ5241B-7 part is unused and in its original packaging.
Return procedure for MMSZ5241B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5241B-7 Tags
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