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Diodes Incorporated MMBZ5240BW-7
- Part No.:
- MMBZ5240BW-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
MMBZ5240BW-7.pdf
- Description:
- DIODE ZENER 10V 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:2,725
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Product details
Overview
MMBZ5240BW-7 from Diodes Incorporated is a 10 V, 200 mW surface-mount Zener diode in SOT323 package, rated for ±5% zener voltage tolerance at 20 mA test current, with 17 Ω zener impedance and 3.0 μA reverse leakage at 8.0 V, used for precision voltage regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the MMBZ5240BW-7 datasheet, MMBZ5240BW-7 pinout, MMBZ5240BW-7 application, or MMBZ5240BW-7 equivalent, key selection criteria include nominal zener voltage (10 V), power rating (200 mW), zener impedance (17 Ω), reverse leakage (3.0 μA @ VR = 8.0 V), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and temperature conditions. Its 10 V nominal zener voltage is specified at 20 mA test current, with tight ±5% tolerance (9.5–10.5 V) and low dynamic impedance (17 Ω at 1 kHz), enabling accurate clamping in signal conditioning and power rail supervision.
Designed for surface-mount assembly on FR4 PCBs with recommended pad layout per AP02001, it delivers thermal resistance of 625 °C/W and operates across –65 °C to +150 °C, meeting AEC-Q101 stress testing requirements for high-reliability automotive and industrial applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10 V nominal, 9.5–10.5 V range at IZT = 20 mA - defines precise clamping threshold for 10 V rail protection |
| Power Dissipation (PD) | 200 mW - limits continuous power handling in compact SOT323 footprint without forced cooling |
| Zener Impedance (ZZT) | 17 Ω at f = 1 kHz - ensures minimal voltage deviation under small-signal AC load variations |
| Reverse Leakage (IR) | 3.0 μA at VR = 8.0 V - guarantees low standby current in battery-powered voltage monitor circuits |
| Thermal Resistance (RθJA) | 625 °C/W - determines junction temperature rise above ambient on standard FR4 board with defined pad layout |
| Operating Temperature | –65 °C to +150 °C - supports deployment in under-hood automotive and industrial control environments |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTGB, TCT, and HAST |
Pinout & Package
Package: SOT323 - ultra-small plastic surface-mount case (2.10 mm × 1.30 mm × 0.90 mm), lead-free matte tin-plated terminals, moisture sensitivity level 1, weight ≈ 0.006 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground path | Connected to lower-potential node during Zener operation; enables standard orientation in shunt regulator configuration |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to supply rail being clamped; carries reverse current during overvoltage events |
| Case / Pin 3 | No internal connection | Non-functional thermal pad - electrically isolated, not tied to anode or cathode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use - meets high-temperature operating life, temperature cycling, and humidity testing requirements |
| SOT323 package | Enables high-density PCB layouts and compatibility with automated pick-and-place equipment |
| Green molding compound | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb) - satisfies strict environmental compliance mandates |
| Lead-free & RoHS compliant | Fully compliant with EU Directive 2011/65/EU - no intentionally added lead, suitable for global production |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping 12 V battery-supplied microcontroller I/O lines against load-dump transients. IC Role / Device Role: Shunt overvoltage protector for ESD-sensitive MCU GPIO pins. Use Value: Limits transient voltage to ≤10.5 V with 3.0 μA leakage, preserving signal integrity without loading active circuits. | Use Scenario: Providing stable 10 V reference for 12-bit ADC front-end in pressure sensor interface. IC Role / Device Role: Precision voltage reference source in ratiometric measurement circuit. Use Value: Delivers ±5% tolerance and 17 Ω impedance to minimize ADC code spread caused by reference drift. |
| Consumer USB-C Power Delivery Monitor | Medical Portable Diagnostic Device |
Use Scenario: Regulating auxiliary 10 V bias rail for USB PD communication IC in charger adapter. IC Role / Device Role: Low-power voltage regulator for isolated PD controller supply. Use Value: Maintains stable 10 V output at 200 mW dissipation with 625 °C/W thermal resistance on compact PCB. | Use Scenario: Protecting analog front-end inputs from ESD during patient electrode connection. IC Role / Device Role: Transient voltage suppressor on biopotential amplifier input stage. Use Value: Responds within nanoseconds to 8 kV HBM pulses while adding <1 pF capacitance per Figure 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C10LT1G | Same 10 V nominal, ±5% tolerance, but 300 mW PD and 20 Ω ZZT; SOT23 package | Larger footprint; higher power margin but less space-efficient | Select when higher surge capability or legacy SOT23 board compatibility is required |
| MMSZ4686T1G | 10 V nominal, ±5%, 500 mW PD, 15 Ω ZZT; SOD-123 package | Higher power rating and lower impedance, but larger size and non-AEC-Q101 qualified | Prefer for non-automotive industrial designs needing tighter regulation under higher current loads |
Compared with BZX84-C10LT1G and MMSZ4686T1G, MMBZ5240BW-7 offers optimal balance of AEC-Q101 qualification, SOT323 miniaturization, and 200 mW power handling-making it the preferred choice for space-constrained automotive modules where reliability and footprint are jointly critical.
Availability
MMBZ5240BW-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, USB-C power delivery monitors, and portable medical diagnostic devices requiring stable component supply and full traceability.
Supply support for MMBZ5240BW-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 spanning Asia, Europe, and North America.
The MMBZ52xxBW series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for precision voltage reference and transient suppression in harsh-environment electronic control units.
FAQ
What is the maximum reverse voltage (VR) at which leakage current is guaranteed?
The datasheet specifies maximum reverse leakage current of 3.0 μA at VR = 8.0 V. This is the highest reverse voltage at which leakage is tested and guaranteed - exceeding 8.0 V enters the zener breakdown region where controlled conduction begins.
Is MMBZ5240BW-7 suitable for bidirectional ESD protection?
No - it is a unidirectional Zener diode optimized for reverse-bias voltage regulation. For bidirectional ESD protection, TVS diodes such as D3V3M1U2SOT-7 or SP1003-01UTG are required, as they clamp symmetrically in both polarities.
How does the 625 °C/W thermal resistance impact PCB layout?
This value assumes use of Diodes' recommended pad layout (AP02001). Deviating from that layout - especially reducing copper area or omitting thermal vias - will increase actual RθJA, risking thermal runaway at sustained 200 mW dissipation.
Does the "-7" suffix indicate tape-and-reel packaging only?
Yes - the "-7" denotes 3000-unit tape-and-reel packaging per the ordering information table. The "-F" suffix (e.g., MMBZ5240BW-7-F) adds RoHS-compliant plating confirmation, but Diodes ships all -7 parts as lead-free and green by default per DS31037 Rev. 14.
MMBZ5240BW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-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:
- SOT-323
MMBZ5240BW-7 FAQ
1.How can I place an order for MMBZ5240BW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5240BW-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 MMBZ5240BW-7 reliable?
The price and inventory of MMBZ5240BW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5240BW-7 is usually 5 days.
3.What payment methods are accepted for MMBZ5240BW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5240BW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5240BW-7?
MMBZ5240BW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5240BW-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 MMBZ5240BW-7?
For technical support, including MMBZ5240BW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5240BW-7 requirements.
6.How does Aetrix verify that MMBZ5240BW-7 is sourced from the original manufacturer or authorized distributors?
All MMBZ5240BW-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 MMBZ5240BW-7 meets industry standards.
7.What is the process for return or replacement of MMBZ5240BW-7?
All MMBZ5240BW-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5240BW-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 MMBZ5240BW-7 part is unused and in its original packaging.
Return procedure for MMBZ5240BW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5240BW-7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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BZX84C3V3LT1G
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Diodes Incorporated
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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