My Inquiry
My Account
Diodes Incorporated MMSZ5229BS-7-F
- Part No.:
- MMSZ5229BS-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MMSZ5229BS-7-F.pdf
- Description:
- DIODE ZENER 4.3V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,349
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMSZ5229BS-7-F from Diodes Incorporated is a surface-mount 4.3 V Zener diode in SOD-323 package, rated for 200 mW power dissipation, with nominal Zener voltage 4.3 V (min 4.09 V, max 4.52 V) at 20 mA test current, 22 Ω dynamic impedance at IZT, and 5.0 µA reverse leakage at 1.0 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning circuits.
For engineers reviewing the MMSZ5229BS-7-F datasheet, MMSZ5229BS-7-F pinout, MMSZ5229BS-7-F application, or MMSZ5229BS-7-F equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (625 °C/W), SOD-323 footprint compatibility, and low-leakage performance at sub-breakdown bias.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under controlled current. Its planar die construction ensures consistent voltage regulation and low temperature coefficient, while the SOD-323 package supports high-density PCB layouts and automated reflow assembly.
It is characterized at 25 °C with 20 mA test current and exhibits 22 Ω Zener impedance at IZT, 2000 Ω at knee current (0.25 mA), and 5.0 µA reverse leakage at 1.0 V - confirming suitability for low-current reference and protection roles where stability and low standby loss are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 4.3 V - precise DC reference point for biasing or clamping |
| Zener Voltage Range | 4.09 V to 4.52 V - ±5% tolerance band at 20 mA, enabling predictable circuit margining |
| Power Dissipation | 200 mW - limits maximum continuous Zener current to ~46 mA at 4.3 V |
| Zener Impedance | 22 Ω at 20 mA - low dynamic resistance ensures minimal output voltage variation under load shifts |
| Reverse Leakage | 5.0 µA at 1.0 V - enables ultra-low quiescent current in standby monitoring circuits |
| Thermal Resistance | 625 °C/W - defines junction-to-ambient temperature rise per watt, critical for derating above 25 °C |
| Package | SOD-323 - 1.7 mm × 1.3 mm footprint with cathode band marking, compatible with IPC-7351B standard |
Pinout & Package
Two-terminal device in SOD-323 package: anode and cathode marked by a visible cathode band on the top surface. No internal bonding wires or multi-pin configuration - polarity must be observed during placement to ensure proper reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to lower-potential side of circuit; forms return path for Zener current |
| Cathode | Reverse-bias input / regulated output node | Connected to higher-potential rail; delivers stabilized 4.3 V when reverse-biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight Zener voltage distribution and repeatable breakdown characteristics across production lots |
| Lead-free & RoHS-compliant plating | Matte tin finish over Alloy 42 leadframe meets EU Directive 2011/65/EU without post-solder contamination risk |
| SOD-323 mechanical outline | 0.004 g weight and 1.3 mm width enable use in space-constrained portable electronics |
| Moisture sensitivity Level 1 | No bake requirement prior to reflow - simplifies manufacturing flow for high-volume SMT lines |
Applications
| Voltage Reference for ADC Biasing | Overvoltage Clamp in Sensor Interface |
|---|---|
Use Scenario: Providing stable 4.3 V reference to bias the input stage of a 12-bit SAR ADC in a battery-powered environmental sensor node. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to generate fixed reference voltage independent of supply variation. Use Value: Enables <±0.5 LSB offset error over 2.8–3.6 V supply range due to tight 4.3 V tolerance and low 22 Ω impedance. | Use Scenario: Protecting a 3.3 V I²C bus line from ESD transients induced by nearby RF modules in a smart home hub. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp limiting voltage excursion to ≤4.52 V during fast-rising events. Use Value: Limits transient overshoot below IC absolute maximum rating (5.5 V) while adding <0.5 pF parasitic capacitance to preserve 400 kHz timing integrity. |
| Low-Power Microcontroller Reset Threshold | Current-Limited LED Biasing |
Use Scenario: Setting brown-out detection threshold for an ARM Cortex-M0+ MCU running from a single-cell Li-ion battery (2.8–4.2 V). IC Role / Device Role / Timing Role: Zener + resistor divider generating hysteresis-free reset trigger at ~3.8 V. Use Value: Achieves deterministic reset assertion at 3.8 V (93% of 4.3 V nominal) with <1 µA quiescent draw from 3.3 V auxiliary rail. | Use Scenario: Biasing a red indicator LED in a medical wearable with strict current control and minimal component count. IC Role / Device Role / Timing Role: Series Zener providing constant 4.3 V drop to set forward current through LED and series resistor. Use Value: Maintains ±3% LED brightness across 3.0–3.6 V supply variation using only two passive components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B4V3,115 | Same 4.3 V nominal, but SOD-323 package with tighter 2% tolerance (4.21–4.39 V); 300 mW rating | Higher power handling allows >60 mA Zener current; better for moderate-load references | Select when tighter voltage tolerance and higher power margin are required, and board layout accommodates identical footprint |
| MMBZ5229BS-7-F | Identical electrical specs and SOD-323 package, but dual-diode configuration (two anodes, shared cathode) | Enables dual-rail clamping or matched reference pairs; requires different routing and decoupling | Choose only if dual-Zener functionality is explicitly needed; otherwise not a drop-in replacement due to pinout mismatch |
Compared with BZX384-B4V3,115 and MMBZ5229BS-7-F, the MMSZ5229BS-7-F offers optimal balance of cost, availability, and 5% tolerance for general-purpose voltage referencing - whereas BZX384-B4V3,115 suits precision needs and MMBZ5229BS-7-F serves dual-channel designs.
Availability
MMSZ5229BS-7-F is available at Aetrix Electronics and suitable for voltage reference design, ESD protection circuits, and microcontroller reset supervision requiring stable component supply and full RoHS compliance.
Supply support for MMSZ5229BS-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 MMSZ52xxBS series belongs to Diodes' general-purpose Zener diode product line, engineered for cost-sensitive, high-volume applications demanding reliable voltage regulation in compact surface-mount packages.
FAQ
What is the maximum continuous Zener current for MMSZ5229BS-7-F at 25°C?
The device is rated for 200 mW power dissipation. At nominal 4.3 V Zener voltage, this corresponds to a maximum continuous Zener current of approximately 46.5 mA (200 mW ÷ 4.3 V). Derating is required above 25°C per the 625 °C/W thermal resistance curve.
Does MMSZ5229BS-7-F have a specified temperature coefficient?
While the datasheet does not list a numeric temperature coefficient, Figure 2 shows typical Zener breakdown curves across temperature, and the 4.3 V nominal value is specified at 25°C. For applications requiring TC data, Diodes' AP02003 application note provides characterization methods for Zener drift in this series.
Can MMSZ5229BS-7-F be used in place of a 3.3 V Zener diode?
No - it is a 4.3 V Zener diode with a minimum breakdown of 4.09 V. Substituting it for a 3.3 V part would result in failure to regulate at the intended voltage and potential circuit malfunction. Use MMSZ5226BS-7-F (3.3 V) instead for that voltage level.
Is the SOD-323 package of MMSZ5229BS-7-F compatible with standard reflow profiles?
Yes - the device is qualified for lead-free reflow per J-STD-020D with Moisture Sensitivity Level 1, meaning it can be placed directly onto PCBs without baking and processed using standard Pb-free peak profiles (e.g., JEDEC Level 3, peak 260°C).
MMSZ5229BS-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 22 Ohms
- Current - Reverse Leakage @ Vr:
- 5 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:
- SOD-323
MMSZ5229BS-7-F FAQ
1.How can I place an order for MMSZ5229BS-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5229BS-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 MMSZ5229BS-7-F reliable?
The price and inventory of MMSZ5229BS-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 MMSZ5229BS-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5229BS-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5229BS-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5229BS-7-F?
MMSZ5229BS-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5229BS-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 MMSZ5229BS-7-F?
For technical support, including MMSZ5229BS-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5229BS-7-F requirements.
6.How does Aetrix verify that MMSZ5229BS-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5229BS-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 MMSZ5229BS-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5229BS-7-F?
All MMSZ5229BS-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5229BS-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 MMSZ5229BS-7-F part is unused and in its original packaging.
Return procedure for MMSZ5229BS-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5229BS-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…
