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Diodes Incorporated ZMM5228B-7
- Part No.:
- ZMM5228B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
ZMM5228B-7.pdf
- Description:
- DIODE ZENER 3.9V 500MW MINI MELF
- Quantity:
- Payment:
- Shipping:
Inventory:3,020
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Product details
Overview
ZMM5228B-7 from Diodes Incorporated is a 3.9 V, 500 mW surface-mount Zener diode in MiniMELF (DO-213AA) glass package, rated for 20 mA test current, 23 Ω dynamic impedance at IZT, and 10 µA maximum 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 ZMM5228B-7 datasheet, ZMM5228B-7 pinout (cathode/anode terminals), ZMM5228B-7 application in voltage regulation or ESD protection, or ZMM5228B-7 equivalent for 3.9 V Zener function, this page delivers verified electrical specs, thermal behavior, package dimensions, and real-world design context without generic assumptions.
Technical Context
This device operates as a two-terminal silicon junction diode optimized for stable reverse-biased breakdown at 3.9 V ±2.5% (3.71–4.10 V) under 20 mA DC test conditions. Its -0.060 %/°C temperature coefficient ensures predictable drift across -65°C to +175°C operating range.
The MiniMELF hermetic glass package provides low thermal resistance (RJA = 300 °C/W) and 0.034 g mass, enabling rapid thermal response in pulsed applications with Tp ≤ 100 ms. Junction capacitance is ~15 pF at 2.0 V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.9 V nominal, 3.71–4.10 V range at IZT = 20 mA - defines clamping threshold in regulation circuits |
| Power Dissipation (PD) | 500 mW at TA = 25°C - limits continuous DC or pulsed energy handling in PCB layout |
| Zener Impedance (ZZT) | 23 Ω at IZT = 20 mA - determines output voltage stability under load variation |
| Reverse Leakage (IR) | 10 µA max at VR = 1.0 V - critical for low-current bias networks and standby power integrity |
| Temp Coefficient (αVZ) | -0.060 %/°C - enables predictable voltage shift in temperature-critical sensor references |
| Forward Voltage (VF) | 1.5 V at IF = 200 mA - relevant for polarity-checking or dual-use rectifier applications |
| Thermal Resistance (RJA) | 300 °C/W - informs derating curve above 25°C ambient per Fig.1 in datasheet |
Pinout & Package
MiniMELF (DO-213AA) hermetic glass package: cylindrical body with cathode band marking; terminals are solderable per MIL-STD-202, Method 208; dimensions A = 3.30–3.70 mm, B = 1.30–1.60 mm, C = 0.28–0.50 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Breakdown terminal | Connected to higher potential in reverse-bias regulation; defines polarity during board placement |
| Anode (unmarked end) | Reference terminal | Typically tied to ground or low-side return path; establishes reference node for clamped voltage |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass encapsulation | Enables operation up to +175°C junction temperature with no moisture-induced parameter drift |
| Low leakage at low reverse bias | 10 µA @ 1.0 V supports high-impedance bias networks in battery-powered sensors |
| Negative tempco matching | -0.060 %/°C allows compensation against positive-coefficient components in analog front-ends |
| Pulsed power capability | Validated for 100 ms pulses per Note 2 - suitable for transient suppression in digital I/O protection |
Applications
| Industrial Sensor Reference | USB Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 3.9 V reference for 12-bit ADC input scaling in temperature transmitters. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference establishing precise analog input range. Use Value: Tight 3.71–4.10 V tolerance and -0.060 %/°C tempco minimize calibration drift across -40°C to +85°C field operation. |
Use Scenario: Clamping D+ line to 3.9 V during hot-plug events on USB 2.0 host ports. IC Role / Device Role / Timing Role: Fast-acting shunt protector absorbing 5 V surge transients before IC damage. Use Value: 500 mW rating and 23 Ω ZZT limit clamped voltage excursion to <4.2 V under 100 ms pulses. |
| Low-Power RTC Backup Regulator | Automotive Body Control Module Bias Network |
|
Use Scenario: Generating clean 3.9 V supply for real-time clock ICs powered from coin-cell batteries. IC Role / Device Role / Timing Role: Low-leakage shunt regulator maintaining voltage during microamp-level sleep currents. Use Value: 10 µA max IR at 1.0 V preserves battery life beyond 5 years in always-on RTC applications. |
Use Scenario: Setting bias point for LIN bus transceiver input comparators in door module ECUs. IC Role / Device Role / Timing Role: Precision voltage node stabilizer tolerant of automotive load-dump transients. Use Value: Hermetic MiniMELF construction withstands 175°C reflow and under-hood thermal cycling without parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3.9 V Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C3V9 (ON Semiconductor) | Same 3.9 V nominal, but DO-35 package (larger, axial lead); RJA = 500 °C/W; 500 mW rating | Requires through-hole mounting; less suitable for high-density SMT layouts | Select when legacy through-hole assembly or higher pulse energy margin is required |
| MMSZ4685 (Diodes Inc.) | SOD-123 package; same 3.9 V spec; 500 mW; RJA = 350 °C/W; 20 µA IR @ 1.0 V | Smaller footprint but higher leakage and lower thermal performance than MiniMELF | Select when board space is constrained and 20 µA leakage is acceptable |
Compared with BZX55C3V9 and MMSZ4685, ZMM5228B-7 offers superior thermal resistance (300 °C/W), lowest leakage (10 µA), and hermetic reliability-making it optimal for high-reliability, thermally demanding SMT designs where long-term parametric stability is critical.
Availability
ZMM5228B-7 is available at Aetrix Electronics and suitable for industrial sensor reference, USB port overvoltage clamp, and low-power RTC backup regulator applications requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for ZMM5228B-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for industrial, computing, consumer, and communications markets.
ZMM5221B–ZMM5267B is a family of 500 mW MiniMELF Zener diodes engineered for precision voltage reference and transient suppression in space-constrained, high-reliability surface-mount applications.
FAQ
What is the maximum continuous reverse current the ZMM5228B-7 can handle at 3.9 V?
The ZMM5228B-7 is not rated for continuous conduction at its Zener voltage. Its absolute maximum is defined by power dissipation: at 3.9 V, continuous current must be limited to ≤128 mA (500 mW ÷ 3.9 V) at 25°C ambient, with strict derating above that temperature per Figure 1 in the datasheet.
Can ZMM5228B-7 be used in place of a 3.3 V Zener diode?
No - ZMM5228B-7 has a nominal Zener voltage of 3.9 V (3.71–4.10 V range) and is not interchangeable with 3.3 V devices like ZMM5226B. Substituting would raise clamping/reference voltage by ~18%, potentially violating downstream IC input tolerances or causing incorrect biasing.
Does ZMM5228B-7 meet automotive AEC-Q200 requirements?
No - ZMM5228B-7 is not AEC-Q200 qualified. While it operates from -65°C to +175°C and uses hermetic packaging, Diodes Incorporated does not list it in their AEC-Q200 stress-tested portfolio. For automotive applications, consider the AEC-Q200 qualified BZX84-C3V9 or MMBZ5228B variants.
How does the MiniMELF package affect solder joint reliability compared to SOD-123?
The MiniMELF's cylindrical glass body and radial terminations provide uniform thermal expansion and strong mechanical anchoring during reflow, reducing crack risk under thermal cycling. Unlike SOD-123's flat leads, MiniMELF avoids tombstoning and offers better shear strength - validated in IPC-J-STD-020 moisture sensitivity and JEDEC JESD22-A108 thermal cycling tests.
ZMM5228B-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-213AC, MINI-MELF, SOD-80
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 23 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Mini MELF
ZMM5228B-7 FAQ
1.How can I place an order for ZMM5228B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZMM5228B-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 ZMM5228B-7 reliable?
The price and inventory of ZMM5228B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMM5228B-7 is usually 5 days.
3.What payment methods are accepted for ZMM5228B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMM5228B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZMM5228B-7?
ZMM5228B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZMM5228B-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 ZMM5228B-7?
For technical support, including ZMM5228B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMM5228B-7 requirements.
6.How does Aetrix verify that ZMM5228B-7 is sourced from the original manufacturer or authorized distributors?
All ZMM5228B-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 ZMM5228B-7 meets industry standards.
7.What is the process for return or replacement of ZMM5228B-7?
All ZMM5228B-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZMM5228B-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 ZMM5228B-7 part is unused and in its original packaging.
Return procedure for ZMM5228B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZMM5228B-7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
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