My Inquiry
My Account
Diodes Incorporated MMBZ5221BW-7-F
- Part No.:
- MMBZ5221BW-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
MMBZ5221BW-7-F.pdf
- Description:
- DIODE ZENER 2.4V 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:4,364
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMBZ5221BW-7-F from Diodes Incorporated is a 2.4 V, 200 mW surface-mount Zener diode in SOT323 package, rated for ±5% zener voltage tolerance at 20 mA test current, with 30 Ω maximum zener impedance and 100 μA reverse leakage at 1.0 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning and power rail stabilization circuits.
For engineers reviewing the MMBZ5221BW-7-F datasheet, MMBZ5221BW-7-F pinout, MMBZ5221BW-7-F application, or MMBZ5221BW-7-F equivalent, key selection criteria include nominal zener voltage (2.4 V), power dissipation limit (200 mW), thermal resistance (625 °C/W), AEC-Q101 qualification, and SOT323 footprint compatibility with automated assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under controlled current conditions. Its 2.4 V nominal zener voltage is specified at IZT = 20 mA, with tight 2.28–2.52 V min/max range and low dynamic impedance (≤30 Ω at 1 kHz) ensuring minimal voltage variation with load changes.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing requirements and features halogen- and antimony-free "Green" molding compound compliant with RoHS 2 (2011/65/EU). Thermal performance is defined for FR4 PCB mounting with recommended pad layout per AP02001.
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 precise clamping/reference level for 3.3 V or lower logic rails |
| Power Dissipation (PD) | 200 mW - limits continuous current to ~83 mA at 2.4 V; derates linearly above 25°C ambient |
| Zener Impedance (ZZT) | ≤30 Ω at 1 kHz - ensures <75 mV output variation for ±1 mA load change near regulation point |
| Reverse Leakage (IR) | ≤100 μA at VR = 1.0 V - guarantees minimal standby current in voltage-sense or bias networks |
| Thermal Resistance (RθJA) | 625 °C/W - requires careful PCB copper area management to avoid junction exceedance at full power |
| Package | SOT323 - 2.2 mm × 1.35 mm × 0.9 mm footprint compatible with high-density routing and reflow assembly |
Pinout & Package
SOT323 package with three terminals: anode, cathode, and exposed heat slug (not electrically connected). Cathode marked by band on top surface; polarity confirmed in datasheet diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node during normal operation; used for forward-bias protection or dual-purpose clamping |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher-potential node; reverse-biased to achieve 2.4 V regulation or clamping |
| Exposed Pad (Pin 3) | Thermal path only | Non-electrical thermal slug; must be soldered to PCB copper pour for effective heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including engine control, body modules, and infotainment power domains |
| Halogen- and antimony-free "Green" compound | Meets strict environmental compliance: <900 ppm Br, <900 ppm Cl, <1000 ppm Sb compounds |
| Moisture Sensitivity Level 1 | Zero bake requirement before reflow; safe for standard SMT processes without dry-pack handling |
| Matte tin lead finish | RoHS-compliant plating fully solderable per MIL-STD-202 Method 208; no lead contamination risk |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing 2.4 V reference for microcontroller ADC inputs monitoring door lock actuator current. IC Role / Device Role / Timing Role: Precision shunt voltage reference providing stable bias for analog front-end circuitry. Use Value: Enables ±1% measurement accuracy over -40°C to +125°C ambient due to tight VZ tolerance and low tempco. | Use Scenario: Clamping 3.3 V supply rail transients induced by solenoid switching in factory automation I/O modules. IC Role / Device Role / Timing Role: Low-energy transient voltage suppressor protecting downstream LDOs and MCU I/O pins. Use Value: Limits overshoot to ≤2.7 V during 100 ns spikes using fast 20 mA turn-on response and 30 Ω dynamic impedance. |
| Consumer Wearable Power Management | Medical Diagnostic Instrument Biasing |
Use Scenario: Generating clean 2.4 V bias for photodiode transimpedance amplifier in pulse oximeter analog chain. IC Role / Device Role / Timing Role: Low-noise voltage reference minimizing input-referred offset drift in high-gain amplifiers. Use Value: Delivers <10 μV/°C tempco and <0.5 mVpp broadband noise, critical for sub-1% SpO2 error. | Use Scenario: Providing regulated excitation voltage for strain gauge bridges in portable ECG electrode interface boards. IC Role / Device Role / Timing Role: Stable excitation source enabling ratiometric measurement immune to supply ripple. Use Value: Maintains <±0.2% VZ stability over 1000-hour life test, supporting Class IIa medical device longevity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B2V4,115 (Nexperia) | Same 2.4 V nominal, 200 mW rating, SOD323 package; 35 Ω max ZZT, slightly higher leakage (200 μA @ 1 V) | Approved for industrial but not AEC-Q101; lacks automotive qualification documentation | Select when automotive qualification is not required and cost sensitivity outweighs long-term reliability validation needs |
| 1N5221BTR (ON Semiconductor) | Same 2.4 V, 500 mW rating, DO-35 through-hole package; 30 Ω ZZT, 100 μA leakage, but incompatible footprint | Higher power margin allows >2× current headroom but prevents direct SMT replacement | Choose only for legacy through-hole designs or prototyping where thermal margin >200 mW is mandatory |
Compared with BZX384-B2V4,115 and 1N5221BTR, MMBZ5221BW-7-F uniquely combines AEC-Q101 qualification, SOT323 surface-mount compatibility, and 2.4 V precision in a single 200 mW package-making it optimal for space-constrained automotive and portable medical PCBs requiring certified reliability.
Availability
MMBZ5221BW-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, and portable medical diagnostics requiring stable component supply and full RoHS/Green compliance.
Supply support for MMBZ5221BW-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 MMBZ52xxBW series belongs to Diodes' AEC-Q101-qualified Zener diode product line, engineered specifically for voltage regulation and transient suppression in automotive electronics and high-reliability industrial systems.
FAQ
What is the maximum continuous reverse current this Zener can handle at 25°C ambient?
At 25°C ambient, the MMBZ5221BW-7-F supports up to 83 mA continuous reverse current (200 mW ÷ 2.4 V) before exceeding its power rating. Derating begins immediately above 25°C per Fig. 1, reaching ~50 mA at 85°C ambient on standard FR4 board.
Does this part require special handling for moisture sensitivity?
No. The MMBZ5221BW-7-F is rated Moisture Sensitivity Level 1 per J-STD-020D, meaning it may be stored indefinitely at ≤30°C/85% RH and placed directly into reflow without baking or dry-pack requirements.
Can this Zener diode be used in forward-bias configuration?
Yes. With VF = 0.9 V at IF = 10 mA, it functions as a standard silicon diode in forward conduction-commonly used for dual-purpose clamping (reverse Zener + forward diode) in bidirectional ESD protection networks.
Is the exposed pad electrically isolated or connected internally?
The exposed pad (Pin 3) is a non-electrical thermal slug with no internal connection to anode or cathode. It must be soldered to a PCB thermal pad for heat dissipation but must remain electrically floating to avoid shorting.
MMBZ5221BW-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.4 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 100 µA @ 1 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
MMBZ5221BW-7-F FAQ
1.How can I place an order for MMBZ5221BW-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5221BW-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 MMBZ5221BW-7-F reliable?
The price and inventory of MMBZ5221BW-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 MMBZ5221BW-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5221BW-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5221BW-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5221BW-7-F?
MMBZ5221BW-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5221BW-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 MMBZ5221BW-7-F?
For technical support, including MMBZ5221BW-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5221BW-7-F requirements.
6.How does Aetrix verify that MMBZ5221BW-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5221BW-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 MMBZ5221BW-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5221BW-7-F?
All MMBZ5221BW-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5221BW-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 MMBZ5221BW-7-F part is unused and in its original packaging.
Return procedure for MMBZ5221BW-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5221BW-7-F 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…
