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Diodes Incorporated MMBZ5221BW-7
- Part No.:
- MMBZ5221BW-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
MMBZ5221BW-7.pdf
- Description:
- DIODE ZENER 2.4V 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:167
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Product details
Overview
MMBZ5221BW-7 from Diodes Incorporated is a 2.4 V, 200 mW surface-mount Zener diode in SOT323 package, rated for 20 mA test current with 30 Ω dynamic impedance at 1 kHz and 100 μA reverse leakage at 1.0 V reverse bias. It provides precision voltage regulation in low-power signal conditioning and reference circuits, compliant with AEC-Q101 for automotive-grade reliability.
For engineers reviewing the MMBZ5221BW-7 datasheet, MMBZ5221BW-7 pinout, MMBZ5221BW-7 application, or MMBZ5221BW-7 equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (625 °C/W), RoHS-compliant lead-free plating, moisture sensitivity level 1, and SOT323 mechanical compatibility with automated pick-and-place assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load or supply conditions. Its 2.4 V nominal Zener voltage is specified at 20 mA test current, with tight ±5% tolerance (2.28–2.52 V) and low dynamic impedance (30 Ω at 1 kHz) ensuring minimal voltage deviation during transient current changes.
The device uses a silicon PN junction optimized for low-power regulation, with forward voltage of 0.9 V at 10 mA and maximum power dissipation of 200 mW at 25 °C ambient. Derating begins above 25 °C per the defined curve (625 °C/W junction-to-ambient thermal resistance), limiting usable current in elevated temperature environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.4 V nominal, 2.28–2.52 V range at 20 mA - defines regulated output voltage with ±5% tolerance |
| Power Dissipation (PD) | 200 mW at TA = 25 °C - sets maximum continuous steady-state power handling |
| Zener Impedance (ZZT) | 30 Ω at IZT = 20 mA, f = 1 kHz - indicates small-signal AC voltage stability under load variation |
| Reverse Leakage (IR) | 100 μA max at VR = 1.0 V - quantifies off-state current that affects high-impedance bias networks |
| Thermal Resistance (RθJA) | 625 °C/W on FR4 board - determines junction temperature rise per mW dissipated |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - relevant for polarity verification and ESD protection path conduction |
| Operating Temperature | −65 to +150 °C - supports extended industrial and automotive under-hood applications |
Pinout & Package
Package: SOT323 - ultra-small plastic surface-mount case (2.10 mm × 1.30 mm × 0.90 mm), molded with halogen/antimony-free "Green" compound, UL 94V-0 rated, 0.006 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode-side connection in reverse-bias regulation | Connected to lower-potential node when used as shunt regulator; enables polarity identification via marking dot |
| Cathode (Pin 2) | Zener breakdown terminal / regulation reference node | Connected to higher-potential node; carries regulated voltage output in standard shunt configuration |
| Case / Pin 3 | No internal connection (NC) | Electrically isolated metal frame; serves only mechanical anchoring and thermal conduction path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use with extended temperature cycling and humidity testing |
| SOT323 footprint | Enables high-density PCB layouts and compatibility with standard 0805-class reflow profiles |
| Lead-free & Green construction | Meets RoHS 2 (2011/65/EU) and halogen-free standards (<900 ppm Br/Cl, <1000 ppm Sb) |
| Moisture Sensitivity Level 1 | Zero bake requirement before reflow; safe for unlimited floor life at ≤30 °C/60% RH |
| Matte tin annealed terminals | Ensures reliable solderability per MIL-STD-202, Method 208 without post-plating oxidation |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 2.4 V reference for microcontroller ADC inputs monitoring door lock status or window position sensors. IC Role / Device Role: Shunt voltage reference maintaining precise bias point despite battery voltage fluctuations (9–16 V). Use Value: Enables accurate 10-bit ADC resolution by holding reference within ±12 mV over temperature and line variation. | Use Scenario: Regulating excitation voltage for resistive bridge sensors (e.g., pressure transducers) in factory automation PLC I/O modules. IC Role / Device Role: Low-power Zener shunt regulator supplying constant 2.4 V to bridge top rail. Use Value: Reduces sensor offset drift to <0.05% FS by stabilizing excitation against 12 V rail ripple and load transients. |
| USB-C Power Delivery Monitor | Medical Wearable Battery Gauge |
Use Scenario: Clamping and referencing voltage sense lines in USB PD CC logic detection circuitry operating from 3.3 V LDO. IC Role / Device Role: Precision clamp diode establishing 2.4 V threshold for CC pin state interpretation. Use Value: Ensures robust USB PD negotiation by fixing detection threshold within ±15 mV across −40 to +85 °C. | Use Scenario: Generating stable reference for fuel gauge IC (e.g., MAX17048) measuring Li-ion cell voltage in compact hearables. IC Role / Device Role: Low-current Zener reference replacing larger TLV431-based solutions in space-constrained designs. Use Value: Saves >0.5 mm² PCB area while maintaining 0.5% voltage accuracy over full battery discharge cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B2V4 | Same 2.4 V nominal, but SOD323 package (slightly larger footprint); 400 mW PD; 60 Ω ZZT | Higher power handling suits higher-current bias networks; less suitable for ultra-dense layouts | Select when >200 mW dissipation or legacy SOD323 tooling is required |
| MMSZ4678 | 2.4 V nominal, SOD-123 package; 500 mW PD; 100 Ω ZZT; no AEC-Q101 qualification | Larger size and non-automotive qualification limit use to commercial-grade consumer products | Choose for cost-sensitive non-automotive applications where thermal margin exceeds 200 mW |
Compared with BZX384-B2V4 and MMSZ4678, MMBZ5221BW-7 offers the smallest footprint (SOT323), AEC-Q101 compliance, and lowest Zener impedance-making it optimal for space-constrained, automotive-qualified, low-noise reference designs where 200 mW suffices.
Availability
MMBZ5221BW-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, USB-C power delivery monitors, and medical wearable battery gauges requiring stable component supply with traceable green sourcing.
Supply support for MMBZ5221BW-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 North America.
The MMBZ52xxBW series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for precision voltage reference and clamping in harsh-environment electronic control units where reliability, small size, and regulatory compliance are critical.
FAQ
What is the maximum reverse voltage (VR) at which leakage current is guaranteed?
The datasheet specifies maximum reverse leakage current of 100 μA at VR = 1.0 V. This is not a breakdown rating but a pre-breakdown leakage specification. The device enters controlled Zener breakdown above ~2.0 V, with nominal regulation beginning at 2.28 V under 20 mA test current.
Can MMBZ5221BW-7 be used in series or parallel configurations?
Series connection is acceptable for higher-voltage references if matched units are used to avoid current imbalance. Parallel operation is not recommended due to inherent Zener voltage tolerances (±5%) causing unequal current sharing and potential thermal runaway-individual regulation paths should be used instead.
Is the SOT323 package compatible with standard reflow profiles for lead-free soldering?
Yes-the SOT323 package is qualified for lead-free reflow per J-STD-020D Level 1, with no floor life limitation. It withstands peak temperatures up to 260 °C and is compatible with standard Pb-free SAC305 profiles when using recommended pad layout AP02001 from Diodes' website.
Does the "-7" suffix indicate tape-and-reel packaging only, or does it affect electrical performance?
The "-7" suffix denotes 3000-unit tape-and-reel packaging per the ordering information table. It has no effect on electrical characteristics, thermal performance, or reliability-only logistics and assembly handling. All electrical specs remain identical to the base part number MMBZ5221BW.
MMBZ5221BW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MMBZ5221BW-7 FAQ
1.How can I place an order for MMBZ5221BW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5221BW-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 MMBZ5221BW-7 reliable?
The price and inventory of MMBZ5221BW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5221BW-7 is usually 5 days.
3.What payment methods are accepted for MMBZ5221BW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5221BW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5221BW-7?
MMBZ5221BW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5221BW-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 MMBZ5221BW-7?
For technical support, including MMBZ5221BW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5221BW-7 requirements.
6.How does Aetrix verify that MMBZ5221BW-7 is sourced from the original manufacturer or authorized distributors?
All MMBZ5221BW-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 MMBZ5221BW-7 meets industry standards.
7.What is the process for return or replacement of MMBZ5221BW-7?
All MMBZ5221BW-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5221BW-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 MMBZ5221BW-7 part is unused and in its original packaging.
Return procedure for MMBZ5221BW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5221BW-7 Tags
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