My Inquiry
My Account
Diodes Incorporated MMSZ5240BS-7
- Part No.:
- MMSZ5240BS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MMSZ5240BS-7.pdf
- Description:
- DIODE ZENER 10V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,608
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMSZ5240BS-7 from Diodes Incorporated is a surface-mount 10 V Zener diode in SOD-323 package, rated for 200 mW power dissipation, 17 Ω zener impedance at 20 mA test current, and maximum 3.0 µA reverse leakage at 8.0 V. It provides precision voltage regulation in low-power biasing, reference, and protection circuits across consumer and industrial PCBs.
For engineers reviewing the MMSZ5240BS-7 datasheet, MMSZ5240BS-7 pinout, MMSZ5240BS-7 application, or MMSZ5240BS-7 equivalent, key selection factors include its 9.5–10.5 V zener voltage tolerance at 20 mA, thermal resistance of 625 °C/W, SOD-323 footprint compatibility, and RoHS-compliant lead-free plating.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage under varying load or supply conditions. Its planar die construction ensures consistent breakdown characteristics and low dynamic impedance (17 Ω at IZT = 20 mA), supporting accurate voltage referencing in analog signal chains and power rail supervision.
The device is optimized for automated SMT assembly with moisture sensitivity level 1 (J-STD-020D) and UL 94V-0 molded plastic case. Its cathode band polarity and 0.004 g weight support high-density board layouts where thermal management and mechanical reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10 V nominal, 9.5–10.5 V range at 20 mA - defines stable regulation point for reference circuits |
| Power Dissipation (PD) | 200 mW - limits continuous current to ~20 mA at 10 V, constraining use to low-power biasing |
| Zener Impedance (ZZT) | 17 Ω at IZT = 20 mA - determines output voltage variation under load transients |
| Reverse Leakage (IR) | 3.0 µA max at VR = 8.0 V - ensures minimal quiescent current in standby-mode protection networks |
| Thermal Resistance (RθJA) | 625 °C/W - requires careful PCB copper area design to avoid junction overheating above +125 °C ambient |
| Operating Temperature | −65 to +150 °C - supports deployment in automotive under-hood and industrial control environments |
Pinout & Package
Package: SOD-323 - ultra-small surface-mount outline (2.3–2.7 mm length × 1.2–1.4 mm width × 0.25–0.35 mm height), designed for high-density routing and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reverse breakdown reference node | Connected to lower-potential side in regulation circuits; defines cathode-referenced voltage clamp point |
| Cathode | Reverse breakdown terminal / Zener voltage output node | Marked with band; supplies regulated 10 V when anode is biased ≤ −8 V relative to cathode |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight VZ tolerance (±5%) and repeatable ZZT across production lots |
| SOD-323 package | Enables 0.65 mm pitch routing and <0.5 mm board thickness compatibility in space-constrained modules |
| Lead-free & RoHS compliant | Matte tin finish over Alloy 42 leadframe meets EU Directive 2011/65/EU without post-process rework |
| Moisture Sensitivity Level 1 | Eliminates bake preconditioning before reflow, reducing manufacturing cycle time and cost |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Providing stable 10 V reference for ADC voltage dividers and op-amp feedback networks in battery-powered sensors. IC Role / Device Role / Timing Role: Zener voltage reference element establishing precise analog measurement baseline. Use Value: ±5% VZ tolerance and 17 Ω ZZT minimize measurement drift across temperature and load variations. | Use Scenario: Clamping transient spikes on 12 V automotive CAN bus lines during load dump events. IC Role / Device Role / Timing Role: Reverse-biased shunt protector diverting excess energy to ground before IC damage occurs. Use Value: 200 mW rating and 3.0 µA leakage at 8 V enable fast response without loading normal operating signals. |
| Low-Power Biasing | Signal Level Shifting |
Use Scenario: Generating fixed bias voltage for JFET amplifiers in audio preamplifier stages. IC Role / Device Role / Timing Role: DC bias source setting gate-source voltage in discrete transistor circuits. Use Value: Low 0.004 g mass and SOD-323 footprint allow placement adjacent to sensitive analog components without mechanical stress. | Use Scenario: Translating 3.3 V logic signals to 10 V levels for legacy industrial PLC inputs. IC Role / Device Role / Timing Role: Passive level translator using forward conduction (0.9 V) and reverse breakdown (10 V) thresholds. Use Value: Dual-mode operation (forward VF = 0.9 V, reverse VZ = 10 V) enables bidirectional interface without 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-C10 | Same 10 V nominal, but ±5% tolerance and 15 Ω ZZT at 5 mA - lower test current, higher impedance at 20 mA | Optimized for lower-current references; less stable under 20 mA loads | Select when bias current is ≤5 mA and board space allows SOD-323-equivalent SOD-323 variant |
| MMBZ5240BLT1G | Identical electrical specs but in SOT-23 package - larger footprint, higher RθJA (400 °C/W) | Better thermal handling at >150 mW; incompatible with ultra-dense SOD-323 layouts | Choose when thermal margin is constrained and PCB real estate permits 2.9 × 1.3 mm footprint |
Compared with BZX384-C10 and MMBZ5240BLT1G, MMSZ5240BS-7 delivers optimal balance of low-profile packaging, 20 mA-rated stability, and industry-standard SOD-323 manufacturability for high-volume consumer electronics.
Availability
MMSZ5240BS-7 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, low-power biasing, and signal level shifting requiring stable component supply and full RoHS compliance.
Supply support for MMSZ5240BS-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 California and operating fabrication facilities in Asia.
The MMSZ52xxBS series belongs to Diodes' general-purpose Zener diode product line, engineered for cost-effective, high-yield voltage regulation in consumer, computing, and industrial power management systems.
FAQ
What is the maximum reverse voltage that can be continuously applied without breakdown?
The MMSZ5240BS-7 begins controlled breakdown at 9.5 V and is rated for stable regulation between 9.5 V and 10.5 V at 20 mA. Applying more than 10.5 V continuously exceeds specification and risks thermal runaway unless current is strictly limited by external series resistance to keep power below 200 mW.
Does this Zener diode require a heatsink in standard FR-4 PCB layouts?
No heatsink is required. With RθJA = 625 °C/W and PD = 200 mW, junction temperature rise is ~125 °C above ambient - acceptable within its −65 to +150 °C operating range if mounted per Diodes' AP02001 recommended pad layout (≥25 mm² copper pour per terminal).
Can MMSZ5240BS-7 replace MMSZ5234BS (6.2 V) in the same circuit?
No - direct substitution is not functionally valid. The 10 V breakdown voltage differs significantly from 6.2 V, altering reference points, clamping thresholds, and bias conditions. Circuit recalculations for current limiting, power dissipation, and downstream voltage tolerances are mandatory before any replacement.
Is the SOD-323 package compatible with standard 0402 pick-and-place equipment?
Yes - the SOD-323 (1.7 × 1.25 mm body) is mechanically compatible with 0402-capable feeders and nozzles. Its cathode band marking and symmetric terminal geometry support reliable optical recognition and placement accuracy ≥99.95% in Class II IPC-A-610-compliant SMT lines.
MMSZ5240BS-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):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 8 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
MMSZ5240BS-7 FAQ
1.How can I place an order for MMSZ5240BS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5240BS-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 MMSZ5240BS-7 reliable?
The price and inventory of MMSZ5240BS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5240BS-7 is usually 5 days.
3.What payment methods are accepted for MMSZ5240BS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5240BS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5240BS-7?
MMSZ5240BS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5240BS-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 MMSZ5240BS-7?
For technical support, including MMSZ5240BS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5240BS-7 requirements.
6.How does Aetrix verify that MMSZ5240BS-7 is sourced from the original manufacturer or authorized distributors?
All MMSZ5240BS-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 MMSZ5240BS-7 meets industry standards.
7.What is the process for return or replacement of MMSZ5240BS-7?
All MMSZ5240BS-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5240BS-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 MMSZ5240BS-7 part is unused and in its original packaging.
Return procedure for MMSZ5240BS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5240BS-7 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
