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Microchip Technology 1N5226BE3
- Part No.:
- 1N5226BE3
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5226BE3.pdf
- Description:
- DIODE ZENER 3.3V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,620
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Product details
Overview
1N5226BE3 from Microsemi is a 3.3 V, ±5% 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 and reference in low-power analog circuits.
For engineers reviewing the 1N5226BE3 datasheet, 1N5226BE3 pinout, 1N5226BE3 application, or 1N5226BE3 equivalent, this page delivers verified electrical specs, thermal derating behavior, RoHS-compliant plating details, and direct alternatives with documented voltage/tolerance/impedance differences.
Technical Context
This Zener operates in reverse breakdown to maintain stable 3.3 V output across 0.25–20 mA operating current range, with temperature coefficient of −0.070 %/°C and minimal capacitance (<5 pF typical per Figure 2). Its glass DO-35 package enables axial through-hole mounting with cathode band polarity marking.
Designed for operation up to +175 °C storage and −65 °C minimum, it exhibits 250 °C/W junction-to-lead thermal resistance at 10 mm lead length and supports soldering at 260 °C for 10 s. Forward voltage is ≤1.5 V at 200 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.3 V @ 20 mA test current - defines regulated output under standard bias |
| Zener Tolerance | ±5% (B suffix) - ensures voltage stays within 3.135–3.465 V at 25 °C |
| Power Dissipation | 500 mW at 25 °C - sets maximum continuous power before thermal derating applies |
| Zener Impedance | 28 Ω @ IZT - indicates regulation stiffness; lower values improve load regulation |
| Reverse Current | 100 μA @ 2.5 V - specifies leakage below knee voltage, critical for low-current bias networks |
| Temp. Coefficient | −0.070 %/°C - quantifies voltage drift with temperature; negative sign means VZ decreases as temp rises |
| Operating Temp. | −65 °C to +175 °C - supports aerospace, industrial, and high-reliability environments |
Pinout & Package
Hermetically sealed glass DO-35 (DO-204AH) axial-leaded package with cathode indicated by colored band; leads are tin-lead or RoHS-compliant matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to circuit ground or lower potential node during Zener operation |
| Cathode | Banded end | Connected to regulated voltage node; must be held positive relative to anode for breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered device | Guarantees compliance with 1N5221–1N5281B family mechanical and electrical standards |
| RoHS-compliant plating | e3 suffix confirms annealed matte-tin finish meeting EU RoHS Directive 2011/65/EU |
| Low Zener impedance | 28 Ω enables tight regulation under varying load currents in reference supplies |
| Radiation-hardened | Inherently radiation hard per MicroNote 050 - suitable for space-qualified designs |
| ESD-insensitive | Passes MIL-STD-750 Method 1020 - eliminates need for ESD handling controls in assembly |
Applications
| Low-Voltage Reference Supply | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Providing stable 3.3 V bias for op-amp input stages or ADC reference inputs in battery-powered instrumentation. IC Role / Device Role / Timing Role: Voltage reference element establishing precise DC offset or scaling point. Use Value: ±5% tolerance and −0.070 %/°C TC ensure reference stability within ±6.5 mV over 0–70 °C ambient range. | Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 3.3 V rail in industrial sensor interfaces. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess current when voltage exceeds 3.3 V threshold. Use Value: 28 Ω Zener impedance limits clamp voltage rise to <3.4 V at 10 mA surge, minimizing stress on protected ICs. |
| Current-Source Bias Network | Temperature-Compensated Reference |
Use Scenario: Generating constant current for LED drivers or transistor biasing using series resistor + 1N5226BE3. IC Role / Device Role / Timing Role: Stable voltage node enabling predictable current setpoint via Ohm's Law. Use Value: 500 mW rating allows ≥15 mA continuous current with 220 Ω series resistor at 5 V supply without exceeding Pd limit. | Use Scenario: Paired with forward-biased diode in temperature-compensated voltage references (e.g., Widlar-style circuits). IC Role / Device Role / Timing Role: Negative-TC Zener counteracting positive-TC forward diode voltage drift. Use Value: −0.070 %/°C coefficient enables cancellation of ~+2 mV/°C forward diode drift over −25 to +85 °C range. |
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 power rating, DO-41 package, 10 Ω Zz - higher power, lower impedance, larger footprint | Supports higher current loads (>30 mA) and better regulation under dynamic load changes | Select when >500 mW dissipation or lower impedance is required; verify PCB pad compatibility with DO-41 |
| BZX55C3V3 | 3.3 V, ±5%, 500 mW, DO-35 package, 90 Ω Zz - same package, higher impedance, tighter manufacturing control | Preferred for cost-sensitive consumer designs where 90 Ω Zz is acceptable for regulation accuracy | Choose for legacy BOM replacement where DO-35 fit is mandatory and higher Zz is tolerable |
Compared with 1N4728A and BZX55C3V3, the 1N5226BE3 offers JEDEC-registered consistency, radiation hardness, and ESD insensitivity - making it preferred for aerospace, defense, and high-reliability industrial use where those attributes outweigh minor impedance or power trade-offs.
Availability
1N5226BE3 is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage protection, and current-source bias applications requiring stable component supply across aerospace, industrial control, and medical instrumentation programs.
Supply support for 1N5226BE3 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, radiation-hardened, and aerospace-grade components.
The 1N52xxB series was designed for precision voltage regulation in mission-critical systems where long-term stability, wide temperature operation, and immunity to environmental stressors are essential.
FAQ
What is the Zener voltage tolerance of the 1N5226BE3?
The 1N5226BE3 has a nominal Zener voltage of 3.3 V with a guaranteed tolerance of ±5%, denoted by the "B" suffix. This means its actual breakdown voltage falls between 3.135 V and 3.465 V when measured at 20 mA and 25 °C, per JEDEC specification and Microsemi's published electrical characteristics table.
Is the 1N5226BE3 RoHS compliant?
Yes, the 1N5226BE3 is RoHS compliant. The "e3" suffix explicitly indicates RoHS-compliant matte-tin plating per EU Directive 2011/65/EU, verified in Microsemi's documentation and confirmed by its qualification to MIL-STD-750 Method 2026 for solderability.
What is the maximum power dissipation of the 1N5226BE3 at room temperature?
The 1N5226BE3 has a maximum steady-state power dissipation of 500 mW at 25 °C ambient temperature. Derating begins above 25 °C at 4.0 mW/°C (250 °C/W thermal resistance), reaching zero dissipation at 150 °C case temperature per the published power derating curve (Figure 1).
Does the 1N5226BE3 have radiation hardness certification?
Yes, the 1N5226BE3 is inherently radiation hard per MicroNote 050, a documented Microsemi technical note confirming performance under total ionizing dose (TID) exposure. This property is intrinsic to its DO-35 glass construction and process, not requiring additional screening.
What is the Zener impedance of the 1N5226BE3 and why does it matter?
The 1N5226BE3 has a Zener impedance (ZZT) of 28 Ω measured at 20 mA test current. This value reflects how tightly the device regulates voltage under changing load conditions - lower impedance yields smaller output voltage variation, critical for precision references and low-noise analog circuits.
1N5226BE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bag
- Product Status:
- Active
- 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:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5226BE3 FAQ
1.How can I place an order for 1N5226BE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5226BE3 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 1N5226BE3 reliable?
The price and inventory of 1N5226BE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5226BE3 is usually 5 days.
3.What payment methods are accepted for 1N5226BE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5226BE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5226BE3?
1N5226BE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5226BE3 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 1N5226BE3?
For technical support, including 1N5226BE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5226BE3 requirements.
6.How does Aetrix verify that 1N5226BE3 is sourced from the original manufacturer or authorized distributors?
All 1N5226BE3 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 1N5226BE3 meets industry standards.
7.What is the process for return or replacement of 1N5226BE3?
All 1N5226BE3 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5226BE3, 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 1N5226BE3 part is unused and in its original packaging.
Return procedure for 1N5226BE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5226BE3 Tags
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BZT52C5V6T-7
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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