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Microchip Technology 1N5228BUR-1
- Part No.:
- 1N5228BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5228BUR-1.pdf
- Description:
- DIODE ZENER 3.9V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,588
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Product details
Overview
1N5228BUR-1 from Microsemi is a 3.9 V, 5% tolerance, 500 mW surface-mount Zener diode in DO-213AA (SOD-80/MELF) glass package, designed for precision voltage regulation in low-power analog circuits, reference supplies, and overvoltage protection. It delivers stable regulation at 20 mA test current with 23 Ω dynamic impedance and operates across –65 °C to +175 °C junction temperature.
For engineers reviewing the 1N5228BUR-1 datasheet, 1N5228BUR-1 pinout, 1N5228BUR-1 application, or 1N5228BUR-1 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (100 °C/W junction-to-end-cap), low leakage (<10 µA @ 0.95 V), radiation-hardened construction, and MIL-PRF-19500 upscreening capability.
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 hermetic sealing and inherent radiation hardness per MicroNote 050.
It exhibits a negative temperature coefficient of –0.060 %/°C, enabling predictable drift compensation in temperature-sensitive references. Thermal performance is defined by RθJEC = 100 °C/W and RθJA = 250 °C/W on FR4, requiring end-cap temperature control below 125 °C for full 0.5 W dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 3.9 V ±5% at 20 mA - defines nominal regulation point with tight production control for stable reference generation. |
| Power Dissipation PD | 0.5 W - maximum steady-state power under specified thermal conditions; derates linearly above 50 °C ambient or 125 °C end-cap. |
| Dynamic Impedance ZZT | 23 Ω at 20 mA - low AC impedance ensures minimal output voltage variation under load transients. |
| Reverse Leakage IR | <10 µA at 0.95 V - enables low-error biasing in high-impedance reference networks. |
| Temp. Coefficient αVZ | –0.060 %/°C - predictable negative drift supports temperature-compensated reference designs. |
| Junction Temp. Range | –65 °C to +175 °C - supports operation in extended industrial, aerospace, and downhole environments. |
| Forward Voltage VF | 1.1 V max at 200 mA - ensures reliable forward conduction for polarity verification or dual-mode protection schemes. |
Pinout & Package
DO-213AA (SOD-80 / MELF) hermetically sealed glass package with axial symmetry and cathode band marking. End-cap terminals are solderable per MIL-STD-750 Method 2026; polarity is indicated by a single black band - cathode is banded end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener regulation terminal | Connected to higher potential during regulation; determines polarity for proper reverse-bias operation. |
| Anode (unbanded end) | Reference return terminal | Serves as circuit ground or common reference node; completes Zener current path. |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded glass construction | Enables hermetic sealing, eliminating moisture ingress and ensuring long-term parameter stability in harsh environments. |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 - suitable for space-qualified and nuclear instrumentation applications without additional shielding. |
| MIL-PRF-19500 upscreening option | Available with MQ/MX/MV/MSP reliability levels - meets military-grade screening requirements for mission-critical systems. |
| Low capacitance | Typical CJ < 2 pF (per Figure 3) - minimizes signal coupling and phase shift in RF bias and timing circuits. |
| ESD robustness | Non-sensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling and assembly. |
Applications
| Industrial Sensor Signal Conditioning | Aerospace Power Supply Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for strain gauges and RTDs in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Precision voltage reference providing fixed 3.9 V bias to bridge sensors, rejecting supply ripple and thermal drift. Use Value: Enables sub-0.1% measurement accuracy over –40 °C to +85 °C ambient due to low tempco and low leakage. |
Use Scenario: Generating stable reference for DC-DC converter feedback loops in satellite power management units. IC Role / Device Role / Timing Role: Primary voltage reference in isolated error amplifiers, regulating 5 V and 3.3 V rails under radiation exposure. Use Value: Maintains regulation integrity after total ionizing dose (TID) exposure >100 krad(Si), per MicroNote 050 validation. |
| Medical Instrumentation Biasing | Automotive Engine Control Unit (ECU) Protection |
Use Scenario: Providing regulated bias for op-amp input stages in portable ECG front-ends. IC Role / Device Role / Timing Role: Low-noise, low-capacitance reference source minimizing signal distortion and settling time degradation. Use Value: Capacitance <2 pF prevents high-frequency attenuation in 0.05–150 Hz biopotential bandwidth. |
Use Scenario: Clamping transient voltages on 5 V sensor supply lines in diesel engine control modules exposed to load dump events. IC Role / Device Role / Timing Role: Overvoltage protection element shunting surge energy to ground when line voltage exceeds 3.9 V. Use Value: Fast response and 0.5 W pulse-handling capability limit clamped voltage to ≤4.2 V for 100 ms surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5228B-1 | Same 3.9 V/5% spec, but in axial DO-35 (JEDEC TO-204AH) package - no MELF form factor or hermetic glass seal. | Lacks radiation hardness and MIL-PRF-19500 upscreening; unsuitable for space or high-reliability mil-aero use. | Select only for cost-sensitive commercial PCBs where through-hole mounting and standard screening suffice. |
| BZX55C3V9 | 3.9 V ±5%, 500 mW, but plastic DO-35 package - higher leakage (>50 µA), no radiation qualification, RθJA ≈ 500 °C/W. | Not rated for extended temperature or radiation environments; limited to consumer/industrial ambient conditions. | Use only in non-critical, low-cost applications where hermeticity, TJ >150 °C, or radiation tolerance are unnecessary. |
Compared with 1N5228B-1 and BZX55C3V9, the 1N5228BUR-1 provides superior thermal performance (RθJEC = 100 °C/W), guaranteed radiation hardness, and hermetic reliability - making it the sole choice for high-integrity analog references where parameter stability under stress is mandatory.
Availability
1N5228BUR-1 is available at Aetrix Electronics and suitable for industrial sensor conditioning, aerospace power reference design, and medical instrumentation requiring stable component supply across extended temperature and radiation-exposed environments.
Supply support for 1N5228BUR-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, radiation-hardened, and high-performance analog and mixed-signal components.
The 1N5228BUR-1 belongs to Microsemi's legacy MIL-PRF-19500 qualified Zener regulator family, engineered for precision voltage reference and overvoltage protection in defense, space, and critical infrastructure systems.
FAQ
What is the Zener voltage tolerance and test condition for the 1N5228BUR-1?
The 1N5228BUR-1 has a nominal Zener voltage of 3.9 V with a ±5% tolerance, measured at a test current IZT of 20 mA and ambient temperature of 25 °C. This tolerance is confirmed by the "B" suffix in the part number and applies across the full operating temperature range when used within thermal limits.
Does the 1N5228BUR-1 support MIL-PRF-19500 screening?
Yes, the 1N5228BUR-1 supports MIL-PRF-19500 upscreening via reliability level suffixes (e.g., MQ, MX, MV, MSP). The base "UR-1" designation indicates the metallurgically bonded surface-mount configuration; adding a reliability prefix enables compliance with specific military screening levels per the standard.
What is the maximum power dissipation and thermal derating behavior of the 1N5228BUR-1?
The 1N5228BUR-1 has a steady-state power dissipation rating of 0.5 W, valid only when the end-cap temperature remains below 125 °C or ambient temperature stays below 50 °C on FR4 board. Derating follows a linear curve beyond those points, governed by RθJEC = 100 °C/W and RθJA = 250 °C/W.
Is the 1N5228BUR-1 RoHS compliant?
RoHS-compliant versions of the 1N5228BUR-1 are available for commercial-grade use only, designated by the "e3" suffix (e.g., 1N5228BUR-1e3). These feature annealed matte-tin plating and meet JEDEC J-STD-609 Category 3 requirements; military-screened variants retain tin-lead terminations.
How is polarity identified on the 1N5228BUR-1 package?
Polarity on the 1N5228BUR-1 is marked by a single black cathode band on the glass body - the banded end is the cathode and must be connected to the higher-potential node during Zener regulation. This marking aligns with industry-standard MELF diode orientation and is visible under standard optical inspection.
1N5228BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N5228BUR-1 FAQ
1.How can I place an order for 1N5228BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5228BUR-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 1N5228BUR-1 reliable?
The price and inventory of 1N5228BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5228BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5228BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5228BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5228BUR-1?
1N5228BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5228BUR-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 1N5228BUR-1?
For technical support, including 1N5228BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5228BUR-1 requirements.
6.How does Aetrix verify that 1N5228BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5228BUR-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 1N5228BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5228BUR-1?
All 1N5228BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5228BUR-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 1N5228BUR-1 part is unused and in its original packaging.
Return procedure for 1N5228BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5228BUR-1 Tags
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