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Vishay General Semiconductor - Diodes Division MMSZ5240C-E3-18
- Part No.:
- MMSZ5240C-E3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5240C-E3-18.pdf
- Description:
- DIODE ZENER 10V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:5,804
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Product details
Overview
MMSZ5240C-E3-18 from Vishay Semiconductors is a silicon planar Zener diode with a nominal zener voltage of 10 V ±2 %, rated for 500 mW power dissipation on lead, and designed for precision voltage regulation in low-power analog and digital supply rails. It features a dynamic resistance of 17 Ω at 20 mA test current, temperature coefficient of +0.064 %/°C, and operates across -55 °C to +150 °C.
For engineers reviewing the MMSZ5240C-E3-18 datasheet, MMSZ5240C-E3-18 pinout, MMSZ5240C-E3-18 application, or MMSZ5240C-E3-18 equivalent, this device is selected for stable reference generation in sensor signal conditioning, microcontroller reset circuits, and overvoltage protection where tight voltage tolerance and thermal stability are required.
Technical Context
The MMSZ5240C-E3-18 operates as a single-element, cathode-anode configured Zener diode optimized for reverse-bias breakdown regulation. Its junction-to-lead thermal resistance is 250 K/W, enabling reliable operation at up to 150 °C junction temperature under defined PCB layout conditions.
It delivers 10 V regulation at 20 mA test current (IZT1), with reverse leakage ≤3 μA at 7.6 V (VR), and exhibits a positive temperature coefficient (+0.064 %/°C) - indicating increasing VZ with rising temperature - critical for biasing stability in temperature-varying environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 10 V ±2 % at 20 mA - enables precise voltage clamping or reference in 3.3 V/5 V system rails |
| Power Dissipation | 500 mW (junction-to-lead) - supports continuous regulation without heatsinking on standard FR-4 |
| Dynamic Resistance | 17 Ω at IZT = 20 mA - ensures low output impedance for stable regulation under load variation |
| Temperature Coefficient | +0.064 %/°C - provides predictable VZ drift for thermal compensation design |
| Reverse Leakage | ≤3 μA at VR = 7.6 V - minimizes standby current in battery-powered sensing nodes |
| Junction Temperature | 150 °C max - suitable for under-hood automotive modules and industrial control enclosures |
Pinout & Package
SOD-123 surface-mount package: 2.7 mm × 3.7 mm body, 1.55 mm lead pitch, cathode marked by bar on top surface. Molded in UL 94 V-0 compound, MSL level 1, compatible with standard reflow profiles (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or lower potential in Zener mode | Provides return path for regulation current; must be routed with low-inductance trace in noise-sensitive applications |
| Cathode | Current exit terminal in forward bias; connected to regulated node in Zener mode | Carries full Zener current; requires adequate copper area for thermal dissipation per JEDEC 51-3 footprint |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Reduces need for post-production calibration in precision analog front-ends |
| AEC-Q101 qualification option available | Supports automotive-grade designs when ordered as MMSZ5240C-HE3_A-18 variant |
| ESD robustness >8 kV HBM | Enables direct integration into unshielded I/O protection circuits without external TVS |
| Thermal resistance junction-to-ambient 420 K/W | Allows 300 mW safe operation on FR-4 board with recommended footprint |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Stabilizing reference voltage for 12-bit ADC inputs in pressure transducers operating from 12 V supply. IC Role / Device Role / Timing Role: Zener diode providing 10 V reference to op-amp gain stage and ADC VREF input. Use Value: ±2 % tolerance ensures <0.5 LSB error across temperature; 17 Ω dynamic resistance maintains linearity under varying sensor bridge current. | Use Scenario: Generating clean reset threshold for ARM Cortex-M0+ MCU in smart meter design. IC Role / Device Role / Timing Role: Voltage supervisor element holding reset active until 3.3 V rail reaches 90 % of nominal. Use Value: Low 3 μA leakage at 7.6 V prevents premature release; +0.064 %/°C TC aligns with MCU's internal bandgap drift profile. |
| Overvoltage Clamp for RS-485 Transceivers | Low-Power Reference in Wearable Biometric Sensors |
Use Scenario: Protecting differential bus lines against ESD transients and supply coupling in factory automation nodes. IC Role / Device Role / Timing Role: Bidirectional clamp formed with two MMSZ5240C-E3-18 devices (anode-to-anode) between A/B lines and ground. Use Value: 10 V breakdown limits common-mode swing to safe levels; 8 kV HBM rating absorbs contact discharge without degradation. | Use Scenario: Supplying stable bias to photodiode TIA in pulse oximeter with coin-cell battery source. IC Role / Device Role / Timing Role: Low-current Zener reference (IZT = 20 mA not required; operates at ~1 mA) for transimpedance amplifier feedback network. Use Value: 3 μA leakage at 7.6 V ensures <100 nA standby drain; SOD-123 footprint fits compact 12 mm × 12 mm PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C10L-7-F | Same 10 V ±2 %, SOD-523 package (smaller), 300 mW Ptot, RthJA = 500 K/W | Higher thermal resistance limits use in high-ambient environments; smaller footprint saves space but reduces solder joint reliability | Select when board area is constrained and ambient temperature stays below 70 °C |
| 1N4740A-TAP | 10 V ±5 %, DO-35 through-hole, 1 W Ptot, RthJA = 500 K/W, no AEC-Q101 option | Looser tolerance increases calibration burden; through-hole mounting incompatible with fully SMT production | Select only for prototyping or legacy through-hole designs requiring higher power margin |
Compared with BZX584C10L-7-F and 1N4740A-TAP, the MMSZ5240C-E3-18 offers tighter tolerance than the 1N4740A-TAP and superior thermal performance versus the BZX584C10L-7-F, making it optimal for production-grade SMT designs needing accuracy and reliability in extended temperature ranges.
Availability
MMSZ5240C-E3-18 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, and portable medical devices requiring stable component supply with RoHS-compliant, commercial-grade Zener regulation.
Supply support for MMSZ5240C-E3-18 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
Vishay Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.
The MMSZ52xx series is part of Vishay's small-signal Zener portfolio engineered for precision voltage reference and clamping in space-constrained, thermally demanding applications - particularly where ±2 % tolerance and AEC-Q101 qualification are required.
FAQ
What is the exact zener voltage and tolerance for MMSZ5240C-E3-18?
The MMSZ5240C-E3-18 has a nominal zener voltage of 10 V with a tolerance of ±2 %, measured at a test current of 20 mA under thermal equilibrium conditions. This specification is guaranteed per the Vishay datasheet revision 1.1 (July 2023) and applies to all units shipped with the "C" suffix. The MMSZ5240C-E3-18 achieves this tight tolerance via process-controlled doping and post-trim screening.
Is MMSZ5240C-E3-18 suitable for automotive applications?
The MMSZ5240C-E3-18 itself is commercial-grade (E3 suffix), but the same die is qualified to AEC-Q101 when ordered as MMSZ5240C-HE3_A-18. For automotive use, specify the HE3_A variant - it includes enhanced testing for temperature cycling, humidity, and ESD, and carries full AEC-Q101 documentation. The MMSZ5240C-E3-18 should not be used in safety-critical automotive systems without validation.
What is the maximum power dissipation of MMSZ5240C-E3-18 on a standard PCB?
On an FR-4 board with the recommended JEDEC 51-3 soldering footprint, the MMSZ5240C-E3-18 is rated for 300 mW continuous power dissipation. Its junction-to-ambient thermal resistance is 420 K/W under those conditions. Exceeding 300 mW risks exceeding the 150 °C maximum junction temperature unless additional copper area or forced cooling is applied.
Does MMSZ5240C-E3-18 have ESD protection built-in?
Yes - the MMSZ5240C-E3-18 exhibits ESD robustness of >8 kV per Human Body Model (HBM) and >800 V per Machine Model (MM), as verified per AEC-Q101 test methods. This intrinsic capability stems from its silicon planar structure and processing, eliminating the need for external ESD protection in many I/O interface applications. The MMSZ5240C-E3-18 leverages this feature in RS-485 and sensor front-end designs.
What package type and marking does MMSZ5240C-E3-18 use?
The MMSZ5240C-E3-18 uses the SOD-123 surface-mount package with cathode indicated by a bar on the top surface. Its marking code is "F0", per the Vishay ordering matrix. The package weighs 10.6 mg, is UL 94 V-0 rated, and has moisture sensitivity level (MSL) 1 - meaning it can be stored indefinitely at ambient conditions without baking prior to reflow.
MMSZ5240C-E3-18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±2%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 8 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ5240C-E3-18 FAQ
1.How can I place an order for MMSZ5240C-E3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5240C-E3-18 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 MMSZ5240C-E3-18 reliable?
The price and inventory of MMSZ5240C-E3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5240C-E3-18 is usually 5 days.
3.What payment methods are accepted for MMSZ5240C-E3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5240C-E3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5240C-E3-18?
MMSZ5240C-E3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5240C-E3-18 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 MMSZ5240C-E3-18?
For technical support, including MMSZ5240C-E3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5240C-E3-18 requirements.
6.How does Aetrix verify that MMSZ5240C-E3-18 is sourced from the original manufacturer or authorized distributors?
All MMSZ5240C-E3-18 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 MMSZ5240C-E3-18 meets industry standards.
7.What is the process for return or replacement of MMSZ5240C-E3-18?
All MMSZ5240C-E3-18 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5240C-E3-18, 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 MMSZ5240C-E3-18 part is unused and in its original packaging.
Return procedure for MMSZ5240C-E3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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