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Microchip Technology 1N5226A/TR
- Part No.:
- 1N5226A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5226A/TR.pdf
- Description:
- DIODE ZENER 3.3V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:2,359
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Product details
Overview
1N5226A/TR from Microsemi is a 3.3 V, ±10% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 20 mA test current and 28 Ω dynamic impedance at IZT, used for precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the 1N5226A/TR datasheet, 1N5226A/TR pinout, 1N5226A/TR application, or 1N5226A/TR equivalent, this part serves as a standard 3.3 V Zener reference with verified thermal stability (−0.070 %/°C), low leakage (100 μA @ 2.64 V), and RoHS-compliant tape-and-reel packaging for automated assembly.
Technical Context
The 1N5226A/TR operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable 3.3 V across its terminals within ±10% tolerance under 20 mA test current. Its DO-35 glass package provides hermetic sealing and operation from −65 °C to +175 °C.
It exhibits 28 Ω zener impedance at IZT and 25 Ω at IZK = 0.25 mA, with temperature coefficient of −0.070 %/°C - confirming negative drift behavior ideal for compensation in bias networks. Forward voltage is ≤1.5 V at 200 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.3 V ±10% - defines regulated output voltage under 20 mA test current; suitable for 3.3 V rail monitoring and clamping. |
| Power Dissipation | 0.5 W at 25 °C - sets maximum continuous power handling before thermal derating begins at 3/8″ lead length. |
| Zener Impedance | 28 Ω @ IZT = 20 mA - indicates small-signal AC resistance affecting regulation accuracy under varying load currents. |
| Reverse Leakage | 100 μA @ VR = 2.64 V - quantifies off-state conduction; critical for low-power standby circuits where quiescent current matters. |
| Temp. Coefficient | −0.070 %/°C - specifies voltage drift per degree Celsius; enables predictable compensation in temperature-sensitive references. |
| Operating Temp. | −65 °C to +175 °C - supports deployment in harsh environments including automotive under-hood and industrial control systems. |
Pinout & Package
DO-35 (DO-204AH) glass axial-leaded package: hermetically sealed, tin-lead or RoHS-compliant matte-tin plating, cathode indicated by band; banded end must be biased positive for Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to circuit common; reverse-biased configuration requires this terminal at lower potential than cathode. |
| Cathode (banded end) | Zener output node | Provides regulated 3.3 V when reverse-biased; polarity marking ensures correct orientation during PCB placement. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered DO-35 construction | Ensures mechanical and electrical interchangeability with legacy 1N52xx designs across manufacturers. |
| ±10% voltage tolerance (A suffix) | Meets cost-sensitive applications requiring moderate regulation accuracy without tight-bin sorting. |
| Low capacitance (typ. <2 pF) | Minimizes high-frequency signal coupling in RF biasing and fast-switching protection circuits. |
| Radiation-hardened design | Inherently radiation-tolerant per MicroNote 050 - validated for space-qualified and nuclear instrumentation use. |
| Tape-and-reel packaging (TR suffix) | Enables automated SMT placement despite axial-leaded form factor via carrier tape compatibility. |
Applications
| Low-Voltage Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 3.3 V reference for ADC voltage dividers and op-amp bias networks in sensor signal conditioning. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference establishing precise DC offset and scaling point. Use Value: Delivers 3.3 V regulation with −0.070 %/°C drift, enabling <±1% total error over −40 °C to +85 °C ambient. |
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events on 3.3 V data lines. IC Role / Device Role / Timing Role: Shunt clamping device limiting voltage excursion above 3.3 V threshold during ESD or surge events. Use Value: Activates at 3.3 V with 28 Ω dynamic impedance, diverting >100 mA surge current while holding line voltage below 3.6 V. |
| Power Supply Feedback | Temperature Compensation Network |
|
Use Scenario: Setting output voltage in linear regulator feedback loops where external resistor divider adjusts regulation point. IC Role / Device Role / Timing Role: Precision Zener element replacing internal bandgap reference to improve accuracy and adjustability. Use Value: Enables 3.3 V output setting with ±10% initial tolerance and predictable −0.070 %/°C drift for predictable loop compensation. |
Use Scenario: Compensating thermistor-based bias networks in RF power amplifier stages operating across wide temperature ranges. IC Role / Device Role / Timing Role: Negative-tempco voltage source counterbalancing positive-tempco components in analog front-ends. Use Value: Provides known −0.070 %/°C coefficient to offset +0.15 %/°C thermistor drift, stabilizing gain over −65 °C to +175 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4728A | 3.3 V ±5%, 1 W rating, DO-41 package, 10 Ω ZZT | Higher power handling and tighter tolerance but larger footprint and higher thermal mass | Select when >500 mW dissipation or ±5% accuracy is required; not drop-in due to DO-41 vs. DO-35 size mismatch |
| BZX55C3V3 | 3.3 V ±5%, 500 mW, DO-35, 90 Ω ZZT, −0.05 %/°C tempco | Lower impedance variation and improved tempco, but non-JEDEC registered and different screening pedigree | Prefer for commercial-grade designs needing better stability; verify MIL-PRF-19500 compliance if military screening is mandatory |
Compared with 1N5226A/TR, 1N4728A offers higher power margin and tighter tolerance but requires PCB layout change, while BZX55C3V3 matches the DO-35 footprint and power rating but lacks JAN/JANTX screening options and has different impedance and tempco behavior.
Availability
1N5226A/TR is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage protection, and analog feedback applications requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5226A/TR 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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N52xx series was designed specifically for ruggedized, JEDEC-standard Zener regulation in mission-critical systems demanding extended temperature range, hermetic packaging, and MIL-PRF-19500 screening options.
FAQ
What is the nominal Zener voltage and tolerance of the 1N5226A/TR?
The 1N5226A/TR has a nominal Zener voltage of 3.3 V with a tolerance of ±10%, as indicated by the "A" suffix per Microsemi's documentation. This tolerance applies under standard test conditions of 20 mA Zener test current at 25 °C ambient temperature, and is guaranteed across the full operating temperature range of −65 °C to +175 °C.
Does the 1N5226A/TR support military-grade screening?
Yes - the 1N5226A/TR can be ordered with military screening prefixes (e.g., MQ, MX, MV, MSP) when combined with the "-1" suffix, enabling compliance with MIL-PRF-19500 for JAN, JANTX, JANTXV, and JANS levels. The base 1N5226A/TR itself is commercial-grade but shares the same DO-35 die and construction as screened variants.
What is the maximum reverse leakage current for the 1N5226A/TR?
The 1N5226A/TR specifies a maximum reverse leakage current (IR) of 100 μA at VR = 2.64 V (80% of nominal Zener voltage). This value is measured after 20 seconds of thermal stabilization with 3/8″ lead length, and remains valid across the full −65 °C to +175 °C operating temperature range.
Is the 1N5226A/TR RoHS compliant?
Yes - the 1N5226A/TR is RoHS compliant when ordered with the "e3" suffix (e.g., 1N5226Ae3/TR), indicating annealed matte-tin plating per MIL-STD-750 Method 2026. The base part uses traditional tin-lead plating unless otherwise specified, and both versions meet solderability requirements at 260 °C for 10 seconds.
What is the thermal resistance of the 1N5226A/TR in typical PCB mounting?
The 1N5226A/TR has a thermal resistance of 310 °C/W junction-to-ambient when mounted on an FR4 PCB with 1 oz copper, 4 mm² pads, and 1 mm track width over 25 mm length. At 3/8″ (10 mm) lead length from body, junction-to-lead thermal resistance is 250 °C/W - critical for calculating safe operating area under pulsed or continuous dissipation.
1N5226A/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±10%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 28 Ohms
- Current - Reverse Leakage @ Vr:
- 25 µA @ 950 mV
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5226A/TR FAQ
1.How can I place an order for 1N5226A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5226A/TR 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 1N5226A/TR reliable?
The price and inventory of 1N5226A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5226A/TR is usually 5 days.
3.What payment methods are accepted for 1N5226A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5226A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5226A/TR?
1N5226A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5226A/TR 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 1N5226A/TR?
For technical support, including 1N5226A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5226A/TR requirements.
6.How does Aetrix verify that 1N5226A/TR is sourced from the original manufacturer or authorized distributors?
All 1N5226A/TR 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 1N5226A/TR meets industry standards.
7.What is the process for return or replacement of 1N5226A/TR?
All 1N5226A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5226A/TR, 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 1N5226A/TR part is unused and in its original packaging.
Return procedure for 1N5226A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5226A/TR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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