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Diodes Incorporated ZMM5226B-7
- Part No.:
- ZMM5226B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
ZMM5226B-7.pdf
- Description:
- DIODE ZENER 3.3V 500MW MINI MELF
- Quantity:
- Payment:
- Shipping:
Inventory:6,304
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Product details
Overview
ZMM5226B-7 from Diodes Incorporated is a 3.3 V, 500 mW surface-mount Zener diode in MiniMELF (DO-213AA) glass package, designed for precision voltage regulation and reference applications at 20 mA test current, with 28 Ω typical zener impedance and -0.070 %/°C temperature coefficient. It operates across -65 °C to +175 °C and supports low-power analog biasing in sensor signal conditioning circuits.
For engineers reviewing the ZMM5226B-7 datasheet, ZMM5226B-7 pinout, ZMM5226B-7 application, or ZMM5226B-7 equivalent, key selection criteria include its 3.14–3.47 V zener voltage tolerance, 25 µA maximum reverse leakage at 1.0 V, 1.5 V forward voltage at 200 mA, and suitability for space-constrained voltage reference designs requiring stable thermal performance up to 175 °C.
Technical Context
This Zener diode delivers regulated voltage reference functionality using a silicon p-n junction operating in reverse breakdown. Its MiniMELF glass package enables high thermal stability and hermetic reliability, with junction-to-ambient thermal resistance of 300 °C/W under ambient-soldered conditions.
The device exhibits a negative temperature coefficient (-0.070 %/°C), indicating decreasing zener voltage with rising temperature - critical for compensation in mixed-temperature analog systems. Electrical behavior is characterized at 25 °C with 100 ms pulse testing, and it maintains 500 mW power dissipation capability within derated ambient limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 V nominal, 3.14–3.47 V range at IZT = 20 mA - defines tight regulation window for low-voltage reference use |
| Zener Impedance (ZZT) | 28 Ω typical at IZT = 20 mA - determines output voltage stability under load variation |
| Reverse Leakage (IR) | 25 µA max at VR = 1.0 V - ensures minimal quiescent current in standby-biased circuits |
| Power Dissipation (PD) | 500 mW at TA = 25 °C - sets maximum continuous DC or pulsed power handling in PCB layout |
| Temp. Coefficient (TC) | -0.070 %/°C - enables predictable drift modeling for temperature-compensated references |
| Forward Voltage (VF) | 1.5 V at IF = 200 mA - relevant for polarity verification and ESD-safe handling during assembly |
| Operating Temp. Range | -65 °C to +175 °C - supports deployment in automotive engine control, industrial sensors, and downhole electronics |
Pinout & Package
MiniMELF (DO-213AA) glass package: cylindrical, hermetically sealed, 3.30–3.70 mm length × 1.30–1.60 mm diameter, cathode band marking. RoHS-compliant Sn97.5Ag2.5 termination, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in shunt regulator | Connected to circuit ground or lowest potential node when used as voltage reference |
| Cathode | Zener breakdown terminal / high-side connection in shunt regulator | Connected to input supply via current-limiting resistor; output voltage referenced to this node |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic Glass Encapsulation | Ensures long-term parameter stability and moisture resistance in harsh environments (e.g., automotive under-hood) |
| Low Temperature Coefficient | -0.070 %/°C enables <±2.3 mV/°C drift over 3.3 V output - suitable for uncompensated mid-precision references |
| MiniMELF Footprint | 0.034 g mass and sub-2 mm diameter allow placement in high-density analog sections without thermal crowding |
| RoHS-Compliant Termination | Sn97.5Ag2.5 finish meets lead-free reflow profiles (J-STD-020) and supports automated SMT assembly |
Applications
| Industrial Sensor Signal Conditioning | Automotive Cabin Control Module Reference |
|---|---|
|
Use Scenario: Biasing op-amp input stages and ADC reference dividers in pressure/temperature transducers. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 3.3 V node for analog front-end scaling. Use Value: Tight 3.14–3.47 V tolerance and -65 °C to +175 °C operation ensure consistent offset calibration across environmental stress tests. |
Use Scenario: Generating local 3.3 V reference for microcontroller I/O protection and CAN transceiver bias in HVAC control units. IC Role / Device Role / Timing Role: Low-power Zener clamp regulating auxiliary rail derived from 5 V system bus. Use Value: 25 µA leakage at 1.0 V minimizes standby current draw, extending battery-backed module uptime. |
| Portable Medical Device Power Monitoring | LED Driver Current Sense Reference |
|
Use Scenario: Providing reference voltage for battery voltage monitoring circuitry in handheld diagnostic tools. IC Role / Device Role / Timing Role: Precision shunt reference feeding comparator inputs for low-battery detection thresholds. Use Value: 28 Ω zener impedance ensures minimal voltage shift (<0.56 mV) under 20 µA sense-current variations. |
Use Scenario: Setting current threshold in constant-current LED driver feedback loop using resistive sensing. IC Role / Device Role / Timing Role: Stable voltage reference for op-amp error amplifier input in current-regulated topology. Use Value: -0.070 %/°C TC aligns with copper trace resistance drift, reducing thermal-induced current error in ambient-temperature lighting systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5226T1G | Same 3.3 V nominal rating but SOD-123 plastic package; 30 Ω ZZT, 25 µA IR, +0.030 %/°C TC | Better suited for cost-sensitive consumer PCBs where hermeticity is not required | Select for higher-volume production with standard reflow profiles and lower procurement cost |
| BZX584C3V3 | 3.3 V, SOD-323 package; 90 Ω ZZT, 5 µA IR at 1 V, ±0.05 %/°C TC | Lower leakage supports ultra-low-power IoT sensor nodes; less stable under thermal cycling | Prefer where standby current <5 µA is mandatory and operating temperature stays below 125 °C |
Compared with ZMM5226B-7, MMSZ5226T1G trades hermetic reliability for cost and board-space efficiency, while BZX584C3V3 prioritizes ultra-low leakage over thermal stability - making the ZMM5226B-7 optimal for high-reliability analog references where environmental robustness is non-negotiable.
Availability
ZMM5226B-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive cabin control modules, and portable medical device power monitoring requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ZMM5226B-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, specializing in high-reliability components for automotive, industrial, and computing markets.
ZMM52xx series belongs to Diodes' legacy Zener diode portfolio targeting precision voltage reference and regulation in space-constrained, thermally demanding applications - emphasizing hermetic packaging and wide-temperature operation.
FAQ
What is the maximum continuous power dissipation for ZMM5226B-7 at 100 °C ambient?
At 100 °C ambient, the ZMM5226B-7 derates to approximately 250 mW based on its 300 °C/W thermal resistance and 175 °C maximum junction temperature. This is calculated using PD(TA) = (TJMAX − TA) / RJA, yielding (175 − 100) / 300 = 0.25 W. Operation beyond this risks thermal runaway.
Can ZMM5226B-7 be used in place of a 3.3 V TL431 shunt regulator?
No - the ZMM5226B-7 is a two-terminal passive Zener diode requiring external current limiting and offering no active regulation or adjustable output. Unlike the TL431, it lacks an internal reference, error amplifier, or cathode/anode/control pin architecture. It serves only as a fixed-voltage clamp or basic reference, not as a programmable shunt regulator.
Is the cathode band orientation standardized for MiniMELF devices?
Yes - the cathode band on ZMM5226B-7 is unidirectional and marks the cathode terminal, consistent with JEDEC DO-213AA specification. When mounted horizontally on PCB, the band faces the current-limiting resistor side; polarity must be verified before reflow to avoid reverse-bias failure during initial power-up.
Why does Diodes Incorporated mark ZMM5226B-7 as "Not Recommended for New Design"?
Diodes recommends migrating to the MMSZ52xx series due to improved manufacturability, tighter parametric binning, and broader SMT process compatibility of the SOD-123 plastic package. The ZMM52xx glass MiniMELF remains fully supported for legacy repair and high-reliability applications where hermetic sealing and extreme temperature resilience are essential design requirements.
ZMM5226B-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):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 28 Ohms
- Current - Reverse Leakage @ Vr:
- 25 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
ZMM5226B-7 FAQ
1.How can I place an order for ZMM5226B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZMM5226B-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 ZMM5226B-7 reliable?
The price and inventory of ZMM5226B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMM5226B-7 is usually 5 days.
3.What payment methods are accepted for ZMM5226B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMM5226B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZMM5226B-7?
ZMM5226B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZMM5226B-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 ZMM5226B-7?
For technical support, including ZMM5226B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMM5226B-7 requirements.
6.How does Aetrix verify that ZMM5226B-7 is sourced from the original manufacturer or authorized distributors?
All ZMM5226B-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 ZMM5226B-7 meets industry standards.
7.What is the process for return or replacement of ZMM5226B-7?
All ZMM5226B-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZMM5226B-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 ZMM5226B-7 part is unused and in its original packaging.
Return procedure for ZMM5226B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZMM5226B-7 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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