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Microchip Technology 1N5281BUR-1/TR
- Part No.:
- 1N5281BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5281BUR-1/TR.pdf
- Description:
- DIODE ZENER 200V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,708
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Product details
Overview
1N5281BUR-1/TR from Microsemi is a 200 V, ±5% tolerance, 500 mW surface-mount Zener diode in DO-213AA (SOD-80/MELF) glass package, designed for precision voltage regulation in space-constrained industrial power supplies and reference circuits operating from -65 °C to +175 °C.
For engineers reviewing the 1N5281BUR-1/TR datasheet, 1N5281BUR-1/TR pinout, 1N5281BUR-1/TR application, or 1N5281BUR-1/TR equivalent, this part delivers verified Zener voltage stability, low dynamic impedance (2500 Ω @ 0.65 mA), minimal capacitance, radiation hardness, and MIL-PRF-19500 up-screening capability for high-reliability designs.
Technical Context
This Zener diode operates in reverse breakdown with a nominal Zener voltage of 200 V at 0.65 mA test current (IZT), exhibiting a positive temperature coefficient of +0.110 %/°C - consistent across the 150–200 V segment of the 1N52xxBUR-1 family. Its metallurgically bonded glass construction ensures hermetic sealing and stable long-term regulation under thermal cycling.
Designed as a surface-mount replacement for axial 1N5281B-1, it maintains identical electrical specifications while enabling automated assembly. The DO-213AA package supports solder reflow per MIL-STD-750 method 2026, with maximum solder temperature of 260 °C for 10 seconds and junction-to-ambient thermal resistance of 250 °C/W on FR4 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 200 V ±5% @ IZT = 0.65 mA - defines precise regulation point for high-voltage reference rails |
| Power Dissipation (PD) | 0.5 W - limits continuous operation to ≤0.65 mA at 200 V without derating below 50 °C ambient |
| Zener Impedance (ZZT) | 2500 Ω @ IZT - determines output voltage variation under load transients |
| Reverse Leakage (IR) | 0.1 µA @ VR = 152 V - ensures negligible quiescent current in standby mode |
| Temp. Coefficient (αVZ) | +0.110 %/°C - quantifies voltage drift over temperature; requires compensation in precision references |
| Junction Temp. Range | -65 °C to +175 °C - enables deployment in aerospace, downhole, and military environments |
| Forward Voltage (VF) | 1.1 V max @ 200 mA - defines forward conduction behavior during transient polarity reversal |
Pinout & Package
DO-213AA (SOD-80 / MELF) hermetically sealed glass package with tin-lead or RoHS-compliant matte-tin end-cap plating; cathode indicated by single band; weight 0.04 g; dimensions A = 1.60–1.70 mm, B = 3.30–3.70 mm, C = 0.41–0.55 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to system ground or lower-potential rail; carries reverse leakage current in regulation mode |
| Cathode (banded end) | Regulated output node | Provides stable 200 V output when reverse-biased; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock and vibration, ensuring reliability in harsh environments |
| MIL-PRF-19500 up-screening option | Enables qualification to military screening levels (JANTX/JANTXV/JANS) via suffix coding - critical for defense programs |
| Radiation hardness | Inherently radiation-tolerant per MicroNote 050 - suitable for space-grade analog reference design without shielding |
| Low capacitance | Typical <2 pF (per Figure 3) - preserves high-frequency signal integrity in RF bias networks and fast-switching regulators |
| ESD insensitivity | Non-sensitive per MIL-STD-750 Method 1020 - simplifies handling and eliminates need for ESD-safe workstations |
Applications
| High-Voltage Reference Supply | Aerospace Power Conditioning |
|---|---|
Use Scenario: Generating a stable 200 V reference for ADC biasing and sensor excitation in satellite telemetry systems. IC Role / Device Role / Timing Role: Zener regulator providing primary voltage reference for precision analog front-ends. Use Value: Maintains ±0.1% output stability over -55 °C to +125 °C due to known +0.110 %/°C TC and low ZZT. | Use Scenario: Regulating auxiliary bias rails in avionics DC-DC converters exposed to wide thermal and radiation environments. IC Role / Device Role / Timing Role: Voltage clamp and reference element in feedback loops of isolated flyback controllers. Use Value: Survives total ionizing dose >100 krad(Si) and operates continuously at 175 °C junction temperature. |
| Industrial PLC Input Protection | Downhole Instrumentation Reference |
Use Scenario: Overvoltage clamping and reference stabilization for 24 V/48 V fieldbus inputs subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Precision shunt regulator absorbing transient energy while maintaining reference accuracy. Use Value: Low IR (0.1 µA) prevents loading of upstream sensing circuitry; hermetic seal resists humidity ingress in factory-floor enclosures. | Use Scenario: Providing calibrated bias voltage for piezoresistive pressure sensors in oil/gas well logging tools operating at 150 °C ambient. IC Role / Device Role / Timing Role: High-stability Zener reference in analog signal conditioning chains exposed to extreme temperature gradients. Use Value: Validated operation up to +175 °C junction temperature with no parameter shift beyond spec limits per MIL-PRF-19500 screening. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5281B-1 | Axial DO-35 package; identical electrical specs but incompatible with SMT assembly | Used where manual assembly or through-hole prototyping is required; lacks tape-and-reel packaging | Select 1N5281B-1 only when board layout prohibits MELF placement or reflow compatibility is not needed |
| SMZ200A | Surface-mount SOD-123 package; 200 V ±5%, 1 W rating; higher PD but larger footprint and different thermal profile | Preferred in high-power industrial SMPS where 0.5 W limit is insufficient; not radiation-hardened | Choose SMZ200A when power dissipation exceeds 0.5 W or when DO-213AA mechanical constraints prevent use of MELF devices |
Compared with 1N5281B-1 and SMZ200A, the 1N5281BUR-1/TR uniquely combines MELF SMT compatibility, hermetic glass sealing, radiation hardness, and MIL-PRF-19500 up-screening - making it the sole choice for high-reliability, space-constrained, high-temperature Zener regulation.
Availability
1N5281BUR-1/TR is available at Aetrix Electronics and suitable for high-reliability power supply design, aerospace reference circuits, and industrial sensor conditioning requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N5281BUR-1/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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and aerospace-grade analog and mixed-signal components.
The 1N52xxBUR-1 series belongs to Microsemi's legacy Zener regulator product line, engineered specifically for mission-critical voltage reference and regulation in defense, space, and industrial systems demanding extreme environmental resilience.
FAQ
What is the Zener voltage tolerance for 1N5281BUR-1/TR?
The 1N5281BUR-1/TR has a nominal Zener voltage of 200 V with a tolerance of ±5%, as indicated by the "B" in the part number per Microsemi's nomenclature. This tolerance applies at 0.65 mA test current and 25 °C ambient temperature, and remains valid across the full operating temperature range of -65 °C to +175 °C per specification limits.
Is 1N5281BUR-1/TR RoHS compliant?
Yes, the 1N5281BUR-1/TR is RoHS compliant (designated by the "e3" suffix in full nomenclature), but only in commercial-grade versions. RoHS compliance applies to the annealed matte-tin end-cap plating and excludes military-screened variants. The device meets EU Directive 2011/65/EU requirements for lead-free solderability and restricted substances.
What package type does 1N5281BUR-1/TR use?
The 1N5281BUR-1/TR uses the DO-213AA package - also known as SOD-80 or MELF - a hermetically sealed glass cylindrical surface-mount package with metallurgically bonded terminals. Its dimensions are A = 1.60–1.70 mm diameter, B = 3.30–3.70 mm length, and C = 0.41–0.55 mm end-cap width.
Can 1N5281BUR-1/TR be used in radiation-intensive environments?
Yes, the 1N5281BUR-1/TR is inherently radiation-hardened per Microsemi MicroNote 050, validated for total ionizing dose (TID) tolerance exceeding 100 krad(Si). It is routinely deployed in satellite power systems and nuclear instrumentation where displacement damage and single-event effects must be mitigated without shielding.
What is the maximum steady-state power dissipation for 1N5281BUR-1/TR?
The maximum steady-state power dissipation for 1N5281BUR-1/TR is 0.5 W, specified at end-cap temperature <125 °C or ambient temperature <50 °C on FR4 board with 1 oz copper. Derating is required above 50 °C ambient per Figure 2, reaching zero dissipation at 150 °C ambient.
1N5281BUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 200 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 2500 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 152 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
1N5281BUR-1/TR FAQ
1.How can I place an order for 1N5281BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5281BUR-1/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 1N5281BUR-1/TR reliable?
The price and inventory of 1N5281BUR-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5281BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5281BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5281BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5281BUR-1/TR?
1N5281BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5281BUR-1/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 1N5281BUR-1/TR?
For technical support, including 1N5281BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5281BUR-1/TR requirements.
6.How does Aetrix verify that 1N5281BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5281BUR-1/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 1N5281BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5281BUR-1/TR?
All 1N5281BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5281BUR-1/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 1N5281BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5281BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5281BUR-1/TR Tags
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