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Diodes Incorporated MMBZ5230BW-7
- Part No.:
- MMBZ5230BW-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
MMBZ5230BW-7.pdf
- Description:
- DIODE ZENER 4.7V 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:2,754
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Product details
Overview
MMBZ5230BW-7 from Diodes Incorporated is a 4.7 V, 200 mW surface-mount Zener diode in SOT323 package, rated for 20 mA test current, 19 Ω dynamic impedance at 20 mA, and 5.0 μA reverse leakage at 2.0 V reverse voltage. 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 MMBZ5230BW-7 datasheet, MMBZ5230BW-7 pinout, MMBZ5230BW-7 application, or MMBZ5230BW-7 equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), low thermal resistance (625 °C/W), AEC-Q101 qualification, RoHS/Green compliance, and SOT323 footprint compatibility with automated assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage regulation across varying load currents. Its 4.7 V nominal Zener voltage is specified at 20 mA test current, with tight ±5% tolerance (4.47–4.94 V) and low dynamic impedance (19 Ω @ 20 mA) ensuring minimal voltage deviation under load transients.
Designed for ambient temperatures from –65 °C to +150 °C, it delivers consistent clamping performance in automotive and industrial environments. The device exhibits only 5.0 μA reverse leakage at VR = 2.0 V and features a 200 mW power dissipation rating derated linearly above +25 °C per Fig. 1 in DS31037 Rev. 14-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 4.7 V ±5% (4.47–4.94 V @ IZT = 20 mA); defines precise clamping threshold for 3.3 V/5 V rail protection |
| Power Dissipation | 200 mW @ TA = +25 °C; supports continuous operation in space-constrained PCB layouts with FR4 pad layout AP02001 |
| Zener Impedance | 19 Ω @ IZT = 20 mA; ensures <100 mV output variation for ±5 mA load shifts in reference circuits |
| Reverse Leakage Current | 5.0 μA @ VR = 2.0 V; guarantees negligible standby current draw in battery-powered sensing nodes |
| Thermal Resistance | 625 °C/W junction-to-ambient; requires no heatsink for typical 25–50 mW operating power in SOT323 |
| Operating Temperature | –65 °C to +150 °C; validated for under-hood automotive and industrial control module deployment |
| AEC-Q101 Qualified | Yes; meets stress testing requirements for automotive electronics including temperature cycling and HTRB |
Pinout & Package
Package: SOT323 - ultra-small plastic surface-mount case (2.10 mm × 1.30 mm × 0.90 mm), matte tin-plated Alloy 42 leadframe, moisture sensitivity level 1, weight ≈ 0.006 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground | Connected to system ground or lower-potential node when used in shunt regulation |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to voltage rail being clamped; carries full Zener current during overvoltage events |
| Case / Pin 3 | Non-functional mechanical tab | Electrically isolated; serves only as structural support and thermal path-no internal connection |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, and HTRB testing per JESD47 |
| Green molding compound | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb); UL 94V-0 flammability rating |
| SOT323 footprint | Compatible with high-speed pick-and-place equipment; enables >12,000 UPH placement rates |
| Lead-free & RoHS compliant | No intentionally added lead; fully compliant with EU Directive 2011/65/EU and JEDEC J-STD-020D Level 1 |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping 5 V supply rail against load dump transients in door module ECUs. IC Role / Device Role: Shunt overvoltage protector placed between VCC and GND adjacent to LDO input. Use Value: Limits transient excursions to ≤5.2 V using 4.7 V Zener knee, preventing damage to downstream 5 V logic ICs. | Use Scenario: Providing stable 4.7 V reference for 12-bit ADC biasing in temperature transmitter front-end. IC Role / Device Role: Precision voltage reference source with low dynamic impedance for ratiometric sensor excitation. Use Value: Enables <±0.5% reference stability over –40 °C to +85 °C, improving overall measurement accuracy by 1 LSB. |
| USB-C Power Delivery Monitor | Smart Meter Voltage Supervisor |
Use Scenario: Monitoring VBUS voltage integrity during hot-plug events in USB PD sink controllers. IC Role / Device Role: Overvoltage detection element feeding comparator input in fault-safety chain. Use Value: Triggers shutdown within 100 ns of >5.5 V excursion due to fast Zener knee response and low capacitance (<2 pF). | Use Scenario: Supervising 3.3 V microcontroller supply in utility meter designs requiring long-term field reliability. IC Role / Device Role: Brown-out and overvoltage detector via resistor-divider + Zener clamp configuration. Use Value: Delivers 10-year operational life with <1 nA aging drift, verified under AEC-Q101 accelerated lifetime testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C4V7 | Same 4.7 V nominal, but 350 mW rating and SOT23 package; higher thermal resistance (500 °C/W) | Higher power handling, but larger footprint and less suitable for ultra-dense layouts | Select when >200 mW surge margin is required and board area permits SOT23 |
| MMBZ5230BS | Identical electrical specs, but SOD-323 package (slightly larger, 2.7 × 1.7 mm vs. SOT323's 2.1 × 1.3 mm) | Lower assembly yield in fine-pitch AOI inspection due to reduced solder joint visibility | Prefer only if legacy SOD-323 tooling exists and SOT323 retooling is cost-prohibitive |
Compared with BZX84-C4V7 and MMBZ5230BS, MMBZ5230BW-7 offers optimal balance of miniaturization (SOT323), automotive qualification, and low-impedance regulation-making it preferred for next-gen compact, AEC-compliant designs where board space and reliability are co-constrained.
Availability
MMBZ5230BW-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioners, USB-C power delivery monitors, and smart meter voltage supervisors requiring stable component supply across multi-year production cycles.
Supply support for MMBZ5230BW-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 the Americas.
The MMBZ52xxBW series belongs to Diodes' AEC-Q101-qualified Zener diode portfolio, engineered specifically for voltage regulation and transient suppression in automotive and industrial systems where space, reliability, and green compliance are critical.
FAQ
What is the maximum reverse voltage before breakdown for MMBZ5230BW-7?
The MMBZ5230BW-7 has a nominal Zener voltage of 4.7 V with a guaranteed range of 4.47 V to 4.94 V at 20 mA test current. Breakdown begins near the lower limit, and full regulation is established above 4.47 V. It is not rated for sustained operation above 4.94 V in reverse bias without exceeding power limits.
Can MMBZ5230BW-7 be used in place of a 5.1 V Zener like MMBZ5231BW?
No-MMBZ5230BW-7 is strictly a 4.7 V device with ±5% tolerance; substituting it for a 5.1 V Zener would cause premature clamping and potential system malfunction. The 0.4 V difference exceeds typical design margins in voltage supervisor or reference circuits.
Is the SOT323 package of MMBZ5230BW-7 compatible with standard reflow profiles?
Yes-the SOT323 package is qualified for lead-free reflow per JEDEC J-STD-020D Level 1 (MSL-1), supporting peak temperatures up to 260 °C. Recommended profile follows IPC/JEDEC J-STD-020, with ramp rate ≤3 °C/s and time above liquidus 60–90 seconds.
Does MMBZ5230BW-7 have polarity marking on the package?
Yes-the SOT323 package features a molded cathode band (visible as a dark stripe) adjacent to Pin 2 (cathode). The top-marking "KG5" identifies the device type, and date code (e.g., "B9") indicates year/month per the datasheet marking key.
MMBZ5230BW-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:
- -
MMBZ5230BW-7 FAQ
1.How can I place an order for MMBZ5230BW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5230BW-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 MMBZ5230BW-7 reliable?
The price and inventory of MMBZ5230BW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5230BW-7 is usually 5 days.
3.What payment methods are accepted for MMBZ5230BW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5230BW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5230BW-7?
MMBZ5230BW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5230BW-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 MMBZ5230BW-7?
For technical support, including MMBZ5230BW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5230BW-7 requirements.
6.How does Aetrix verify that MMBZ5230BW-7 is sourced from the original manufacturer or authorized distributors?
All MMBZ5230BW-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 MMBZ5230BW-7 meets industry standards.
7.What is the process for return or replacement of MMBZ5230BW-7?
All MMBZ5230BW-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5230BW-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 MMBZ5230BW-7 part is unused and in its original packaging.
Return procedure for MMBZ5230BW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5230BW-7 Tags
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