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Microchip Technology 1N5227BUR-1
- Part No.:
- 1N5227BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5227BUR-1.pdf
- Description:
- DIODE ZENER 3.6V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,941
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Product details
Overview
1N5227BUR-1 from Microsemi is a 3.6 V, ±5% tolerance, 500 mW surface-mount Zener diode in DO-213AA (SOD80) MELF glass package, designed for precision voltage regulation in low-power analog circuits, reference supplies, and overvoltage protection. It delivers 24 Ω dynamic impedance at 20 mA test current, operates from –65 °C to +175 °C, and exhibits –0.065 %/°C temperature coefficient.
For engineers reviewing the 1N5227BUR-1 datasheet, 1N5227BUR-1 pinout, 1N5227BUR-1 application, or 1N5227BUR-1 equivalent, key selection criteria include Zener voltage accuracy, thermal stability across wide temperature ranges, low leakage (<15 µA at 0.95 V), minimal capacitance, and hermetic glass packaging for reliability in harsh environments.
Technical Context
This device functions as a two-terminal reverse-biased voltage reference, operating in the Zener breakdown region with specified regulation at IZT = 20 mA. Its metallurgically bonded glass construction ensures stable junction characteristics and radiation hardness per MicroNote 050.
It supports operation up to 175 °C junction temperature with RθJA = 250 °C/W on FR4 (1 oz Cu), and requires end-cap temperature <125 °C or ambient <50 °C for full 500 mW dissipation. Forward voltage is ≤1.1 V at 200 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 3.6 V ±5% at 20 mA - defines precise regulation point for biasing and reference circuits |
| Power Dissipation PD | 0.5 W - sets maximum continuous power handling on standard FR4 PCB |
| Zener Impedance ZZT | 24 Ω at IZT = 20 mA - determines output voltage variation under load changes |
| Reverse Leakage IR | <15 µA at VR = 0.95 V - ensures minimal error current in high-impedance reference nodes |
| Temp. Coefficient αVZ | –0.065 %/°C - enables predictable drift compensation in temperature-sensitive designs |
| Junction Temp. Range | –65 °C to +175 °C - supports operation in aerospace, industrial, and downhole applications |
| Package | DO-213AA (SOD80/MELF) - hermetically sealed glass body with end-cap terminations for reliability |
Pinout & Package
DO-213AA (SOD80) is a cylindrical metallurgically bonded glass MELF package with two solderable end-cap terminals. Cathode is marked by a single band; polarity must be observed during placement - cathode side connects to higher potential for Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connects to circuit common or lower-potential rail; carries reverse leakage and regulation current |
| Cathode (banded end) | Regulated output node | Provides stable 3.6 V reference when biased positively relative to anode; interfaces directly with op-amp inputs or feedback networks |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in humid or corrosive environments |
| Metallurgical bond interface | Ensures mechanical robustness and thermal cycling reliability without interfacial delamination |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 - suitable for space-qualified and nuclear instrumentation systems |
| Low capacitance (typ. <2 pF) | Minimizes signal coupling and phase shift in RF bias networks and high-speed reference paths |
| MIL-PRF-19500 upscreening option | Enables qualification to military screening levels (JANTX/JANTXV) via suffix configuration |
Applications
| High-Voltage Reference Supply | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Providing stable 3.6 V bias for analog front-end amplifiers in data acquisition modules operating from unregulated 5–12 V rails. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference, sinking excess current to maintain fixed node voltage. Use Value: Delivers ±5% initial accuracy and –0.065 %/°C drift, enabling <±1% total error over –40 °C to +85 °C without trimming. | Use Scenario: Protecting microcontroller I/O pins against transient surges exceeding 3.6 V in industrial sensor interfaces. IC Role / Device Role / Timing Role: Two-terminal clamp limiting input voltage to safe logic threshold while absorbing surge energy. Use Value: With 24 Ω ZZT and 0.5 W rating, it clamps within 0.1 V of nominal VZ under 100 mA transients, preventing latch-up. |
| Temperature-Stable Oscillator Bias | Low-Power Sensor Excitation |
Use Scenario: Setting bias current for crystal oscillator sustaining amplifiers where frequency stability depends on supply voltage consistency. IC Role / Device Role / Timing Role: Shunt regulator establishing fixed current source via series resistor into amplifier input stage. Use Value: –0.065 %/°C tempco and <15 µA leakage ensure oscillator bias current varies <0.8% across –25 °C to +70 °C. | Use Scenario: Exciting resistive bridge sensors (e.g., strain gauges) in battery-powered condition monitoring devices. IC Role / Device Role / Timing Role: Precision voltage source delivering constant 3.6 V excitation independent of battery discharge curve. Use Value: Enables ratiometric measurement accuracy to ±0.5% over full temperature range using only passive components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5227B-1 | Same electrical specs but in axial DO-35 (DO-204AH) package; no MELF form factor | Requires through-hole PCB layout; unsuitable for automated SMT assembly | Select when legacy board compatibility or manual prototyping is prioritized over density and reflow compatibility |
| BZX55C3V6 | 3.6 V ±5%, 500 mW, DO-35 package; higher ZZT (30 Ω) and wider tempco (±0.08 %/°C) | Limited to commercial-grade industrial use; not radiation-hardened or MIL-screenable | Choose for cost-sensitive consumer applications where hermetic sealing and radiation tolerance are unnecessary |
Compared with 1N5227B-1 and BZX55C3V6, the 1N5227BUR-1 uniquely combines SMT-compatible MELF packaging, radiation hardness, and tight –0.065 %/°C tempco - making it optimal for high-reliability embedded systems where size, stability, and environmental resilience are critical.
Availability
1N5227BUR-1 is available at Aetrix Electronics and suitable for precision voltage reference, overvoltage protection, and low-power sensor excitation applications requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for 1N5227BUR-1 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 Corporation (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 1N52xxBUR-1 series belongs to Microsemi's legacy Zener regulator product line, engineered for applications demanding hermetic packaging, wide temperature operation, and proven radiation tolerance in mission-critical systems.
FAQ
What is the Zener voltage and tolerance of the 1N5227BUR-1?
The 1N5227BUR-1 has a nominal Zener voltage of 3.6 V with a tolerance of ±5% at 20 mA test current (IZT). This value is guaranteed per the "B" suffix in the part number and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0232-1 Rev. 1. The device maintains regulation within this band across its rated operating temperature range.
What package type does the 1N5227BUR-1 use, and is it RoHS compliant?
The 1N5227BUR-1 uses the DO-213AA (SOD80/MELF) hermetically sealed glass package with metallurgically bonded end caps. Per the datasheet, RoHS-compliant versions are available for commercial-grade units (indicated by "e3" suffix), though the base 1N5227BUR-1 part number as documented does not include that suffix and is non-RoHS unless explicitly ordered with "e3".
What is the maximum power dissipation and thermal derating behavior of the 1N5227BUR-1?
The 1N5227BUR-1 has a steady-state power dissipation rating of 0.5 W at end-cap temperature <125 °C or ambient temperature <50 °C on FR4 with 1 oz copper. Its thermal resistance is RθJA = 250 °C/W. Derating begins linearly above 50 °C ambient, reaching zero power at 150 °C ambient per Figure 2 in the datasheet.
Does the 1N5227BUR-1 have radiation hardness certification, and what documentation supports it?
Yes, the 1N5227BUR-1 is inherently radiation hard per Microsemi MicroNote 050, as stated in the Applications/Benefits section of the datasheet. This applies to the entire 1N52xxBUR-1 family and is a material-level characteristic of the metallurgically bonded glass construction-not a test report for each individual lot.
How does the temperature coefficient of the 1N5227BUR-1 affect its performance in precision circuits?
The 1N5227BUR-1 has a temperature coefficient of –0.065 %/°C, meaning its Zener voltage decreases by approximately 2.34 mV/°C around 3.6 V. This predictable negative drift allows designers to compensate in multi-stage references or select complementary components, supporting stable operation over –65 °C to +175 °C without active calibration.
1N5227BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 24 Ohms
- Current - Reverse Leakage @ Vr:
- 15 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N5227BUR-1 FAQ
1.How can I place an order for 1N5227BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5227BUR-1 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 1N5227BUR-1 reliable?
The price and inventory of 1N5227BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5227BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5227BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5227BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5227BUR-1?
1N5227BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5227BUR-1 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 1N5227BUR-1?
For technical support, including 1N5227BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5227BUR-1 requirements.
6.How does Aetrix verify that 1N5227BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5227BUR-1 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 1N5227BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5227BUR-1?
All 1N5227BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5227BUR-1, 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 1N5227BUR-1 part is unused and in its original packaging.
Return procedure for 1N5227BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5227BUR-1 Tags
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