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Diodes Incorporated MMSZ5227BQ-7-F
- Part No.:
- MMSZ5227BQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5227BQ-7-F.pdf
- Description:
- DIODE ZENER 3.6V 370MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:7,240
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Product details
Overview
MMSZ5227BQ-7-F from Diodes Incorporated is an AEC-Q101-qualified 3.6V, 500mW surface-mount Zener diode in SOD123 package, designed for precision voltage regulation and reference in automotive power management circuits, ECU voltage supervisors, and sensor biasing networks. It delivers ±5% zener voltage tolerance (3.42–3.78V), 24Ω dynamic impedance at 20mA test current, and 15µA reverse leakage at 1.0V.
For engineers reviewing the MMSZ5227BQ-7-F datasheet, MMSZ5227BQ-7-F pinout, MMSZ5227BQ-7-F application, or MMSZ5227BQ-7-F equivalent, key selection criteria include automotive-grade reliability, low zener impedance at nominal current, tight voltage tolerance, thermal derating behavior, and SOD123 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its 3.6V nominal zener voltage exhibits a positive temperature coefficient of +0.03%/°C (per Figure 6), enabling predictable drift compensation in analog sensing chains.
The device is rated for 370mW power dissipation at 25°C ambient and derates linearly to 500mW at 75°C lead temperature. Thermal resistance junction-to-ambient is 338°C/W on FR-4 with 1-inch copper pad, defining its safe operating area in thermally constrained automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.6 V ±5% (3.42–3.78 V @ 20 mA); enables accurate 3.3V rail monitoring with margin |
| Zener Impedance | 24 Ω @ 20 mA; ensures minimal output voltage variation under load transients |
| Power Dissipation | 370 mW @ TA = 25°C; defines maximum continuous DC power in standard PCB layout |
| Reverse Leakage | 15 µA @ VR = 1.0 V; guarantees low quiescent current in always-on bias networks |
| Package | SOD123; industry-standard 2-pin surface-mount outline with cathode band polarity marking |
| AEC-Q101 Qualification | Qualified for automotive applications; validated for temperature cycling, HTRB, and ESD robustness |
| Thermal Resistance | 338 °C/W (Junction-to-Ambient); determines required copper area for thermal management |
Pinout & Package
Two-terminal device in SOD123 plastic package with cathode band marking. Cathode terminal is electrically connected to the banded end; anode is unmarked end. Standard SOD123 footprint requires 0.9 mm pad width (X), 4.05 mm pad length (X1), and 0.95 mm spacing (Y).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit ground or lower-potential rail; establishes reference return path |
| Cathode | Reverse breakdown terminal / Zener output node | Provides regulated 3.6V output when reverse-biased; marked with band for orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood and ECU environments per stress test requirements |
| Green molding compound | Halogen- and antimony-free UL 94V-0 compliant material; supports RoHS and ELV compliance |
| Low zener impedance | 24 Ω at 20 mA ensures <10 mV output shift across 1–20 mA load range |
| Automated assembly compatibility | SOD123 geometry and matte tin plating support reliable pick-and-place and reflow soldering |
| Moisture sensitivity level | MSL Level 1 per J-STD-020; no baking required prior to assembly |
Applications
| Automotive Engine Control Unit (ECU) Voltage Supervisor | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Monitoring 5V supply rail integrity in engine control modules to trigger fault logging or limp-home mode. IC Role / Device Role / Timing Role: Zener reference element in comparator-based undervoltage detection circuit. Use Value: 3.6V threshold provides 1.4V headroom below 5V rail while maintaining noise immunity via low ZZT. | Use Scenario: Providing stable bias voltage for bridge-type pressure sensors in factory automation transmitters. IC Role / Device Role / Timing Role: Precision shunt reference for Wheatstone bridge excitation. Use Value: ±5% tolerance and +0.03%/°C TC enable <0.5% full-scale error over –40°C to +125°C. |
| Consumer IoT Battery Protection Circuit | Medical Diagnostic Equipment Power Sequencing |
Use Scenario: Overvoltage clamp for Li-ion battery charging IC input during transient surges. IC Role / Device Role / Timing Role: Shunt protection device limiting voltage to 3.78V max during fault events. Use Value: 500mW peak power rating absorbs 100ms 100mA surge without degradation. | Use Scenario: Enabling controlled power-up sequence for FPGA and ADC subsystems in portable ultrasound units. IC Role / Device Role / Timing Role: Reference source for reset supervisor IC requiring precise 3.6V threshold. Use Value: Low 15µA leakage preserves standby current budget in battery-powered diagnostic modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C3V6LT1G | 3.6V ±5%, 300mW, SOD-523 package, 30Ω ZZT @ 5mA | Lower power rating and smaller footprint; higher impedance reduces regulation accuracy at >10mA | Select for space-constrained consumer designs where 300mW suffices and SOD-523 is preferred |
| MMSZ5227BT1G | Identical electrical specs but commercial-grade (non-AEC-Q101), same SOD123 package | Lacks automotive qualification; unsuitable for ECU or ADAS modules requiring AEC compliance | Select for cost-sensitive industrial or consumer applications without automotive reliability requirements |
Compared with BZX584C3V6LT1G and MMSZ5227BT1G, MMSZ5227BQ-7-F uniquely combines AEC-Q101 qualification, 500mW power handling, and 24Ω zener impedance-making it the only choice for automotive voltage supervision where both reliability and regulation precision are mandatory.
Availability
MMSZ5227BQ-7-F is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and medical power sequencing requiring stable component supply with guaranteed AEC-Q101 compliance and traceable lot history.
Supply support for MMSZ5227BQ-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.
The MMSZ52xxB series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for voltage reference, regulation, and protection in harsh-environment electronic control units.
FAQ
What is the maximum reverse voltage this Zener can sustain before breakdown?
The MMSZ5227BQ-7-F has a nominal zener voltage of 3.6V with a guaranteed range of 3.42V to 3.78V at 20mA test current. Breakdown occurs within this range; operation above 3.78V under sustained current exceeds specification and risks thermal runaway unless power dissipation remains within derated limits.
Does this part require a heatsink in typical automotive PCB layouts?
No heatsink is required. With 338°C/W junction-to-ambient thermal resistance on FR-4 with 1-inch copper pad, the device stays within 150°C max junction temperature at ≤370mW dissipation and 25°C ambient. Standard layout meets thermal needs for most ECU and body-control applications.
How does the temperature coefficient affect performance across –40°C to +125°C?
Per Figure 6, MMSZ5227B exhibits +0.03%/°C TC. Over 165°C range, total zener voltage drift is ~5%, keeping output within 3.42–3.78V band. This stability supports reliable undervoltage detection in automotive ambient extremes without external compensation.
Can this Zener be used in place of a TL431-based shunt regulator?
No-it lacks the active feedback, adjustable threshold, and 100mA sink capability of TL431. MMSZ5227BQ-7-F is a passive two-terminal shunt reference best suited for fixed-voltage clamping or low-current biasing, not programmable regulation or high-current error amplification.
MMSZ5227BQ-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):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 370 mW
- Impedance (Max) (Zzt):
- 24 Ohms
- Current - Reverse Leakage @ Vr:
- 15 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ5227BQ-7-F FAQ
1.How can I place an order for MMSZ5227BQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5227BQ-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 MMSZ5227BQ-7-F reliable?
The price and inventory of MMSZ5227BQ-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 MMSZ5227BQ-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5227BQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5227BQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5227BQ-7-F?
MMSZ5227BQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5227BQ-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 MMSZ5227BQ-7-F?
For technical support, including MMSZ5227BQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5227BQ-7-F requirements.
6.How does Aetrix verify that MMSZ5227BQ-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5227BQ-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 MMSZ5227BQ-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5227BQ-7-F?
All MMSZ5227BQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5227BQ-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 MMSZ5227BQ-7-F part is unused and in its original packaging.
Return procedure for MMSZ5227BQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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