My Inquiry
My Account
Microchip Technology 1N5280BUR-1/TR
- Part No.:
- 1N5280BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5280BUR-1/TR.pdf
- Description:
- DIODE ZENER 190V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,036
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5280BUR-1/TR from Microsemi is a 190 V, ±5% tolerance, 500 mW surface-mount Zener diode in DO-213AA (SOD80) MELF glass package, designed for precision voltage regulation in power supply reference and overvoltage protection circuits operating from -65 °C to +175 °C.
For engineers reviewing the 1N5280BUR-1/TR datasheet, 1N5280BUR-1/TR pinout, 1N5280BUR-1/TR application, or 1N5280BUR-1/TR equivalent, this part delivers verified Zener voltage stability, low leakage (<0.1 µA at 144 V), and radiation-hardened performance per MicroNote 050-critical for aerospace, industrial control, and high-reliability analog monitoring systems.
Technical Context
This Zener operates in reverse breakdown with a nominal VZ of 190 V at IZT = 0.66 mA, exhibiting a positive temperature coefficient of +0.110 %/°C and dynamic impedance ZZT = 2400 Ω at test current. Its metallurgically bonded glass construction ensures hermetic sealing and ESD immunity per MIL-STD-750 Method 1020.
Designed for stable regulation across wide temperature extremes, it maintains ≤0.1 µA reverse leakage at VR = 144 V and supports steady-state dissipation up to 500 mW when TEC < 125 °C or ambient < 50 °C on FR4 board-enabling use in unregulated DC rails and feedback sensing nodes without thermal runaway risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 190 V at IZT = 0.66 mA - sets precise clamping threshold for overvoltage protection circuits |
| Power Dissipation (PD) | 0.5 W - defines maximum continuous energy handling without thermal derating on standard FR4 layout |
| Zener Impedance (ZZT) | 2400 Ω - indicates regulation stiffness; higher value implies greater output voltage variation under load change |
| Reverse Leakage (IR) | <0.1 µA at VR = 144 V - ensures minimal standby current in high-impedance bias networks |
| 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 operation in extended-environment automotive, downhole, and military systems |
| Package | DO-213AA (SOD80) - cylindrical MELF glass body with end-cap terminations; RoHS-compliant matte-tin plating |
Pinout & Package
DO-213AA (SOD80) MELF glass package: hermetically sealed, metallurgically bonded, cathode band marked on one end cap. Terminals are symmetric end caps; polarity defined by cathode band (banded end is anode in forward bias, cathode in Zener regulation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode End Cap | Forward anode / Zener cathode reference | Connected to regulated node; banded end must be held positive relative to opposite end for Zener conduction |
| Cathode End Cap | Forward cathode / Zener anode reference | Connected to circuit ground or lower-potential rail; reverse-biased during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in humid or corrosive environments |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050-no additional shielding required for TID-sensitive applications |
| Low capacitance (typ. ~1.5 pF) | Minimizes signal coupling and noise injection in high-frequency feedback paths and RF-adjacent circuits |
| MIL-PRF-19500 upscreening option | Enables qualification for space-grade and defense programs requiring enhanced reliability screening |
| ESD robustness (MIL-STD-750 Method 1020) | Withstands human-body-model discharges without parameter shift-reduces assembly-line failure risk |
Applications
| Industrial Power Supply Reference | Aerospace Voltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback converters where primary-side sensing requires high-voltage tolerance. IC Role / Device Role / Timing Role: Zener voltage reference providing stable 190 V clamp point for optocoupler bias and overvoltage detection. Use Value: Enables accurate regulation despite input transients up to 200 V while maintaining <0.1 µA leakage at 144 V. | Use Scenario: Protecting avionics bus monitors against lightning-induced surges on 28 V DC distribution lines. IC Role / Device Role / Timing Role: Standoff clamp limiting transient voltage to 190 V before downstream TVS activation. Use Value: Radiation-hardened construction ensures no parametric shift after total ionizing dose exposure per MIL-STD-883. |
| Downhole Sensor Bias Network | High-Temperature Test Equipment |
Use Scenario: Generating stable bias for piezoresistive pressure sensors in oil-well logging tools operating at 175 °C. IC Role / Device Role / Timing Role: Precision Zener reference maintaining regulation across full -65 °C to +175 °C junction range. Use Value: Temperature coefficient of +0.110 %/°C allows predictable drift compensation in closed-loop calibration algorithms. | Use Scenario: Calibrating high-voltage probes in semiconductor wafer test systems requiring traceable 190 V reference. IC Role / Device Role / Timing Role: Primary voltage standard in metrology-grade divider networks with <5% tolerance and hermetic stability. Use Value: DO-213AA package withstands repeated reflow cycles without seal degradation-ensuring long-term calibration integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5280B-1 | Same 190 V VZ, ±5% tolerance, but in axial DO-35 package-not surface mount | Requires through-hole PCB layout; unsuitable for automated SMT assembly | Select only if legacy board design mandates axial leaded components or manual prototyping |
| SMF190A | 190 V unidirectional TVS diode (not Zener regulator); 1.5 kW peak pulse power; 100 ns response | Designed for transient suppression-not steady-state regulation; higher leakage (~1 µA) | Choose for surge protection only; not interchangeable for reference or bias functions |
Compared with 1N5280B-1 and SMF190A, the 1N5280BUR-1/TR provides true SMT-compatible Zener regulation with hermetic stability and radiation tolerance-making it the sole choice for high-reliability, high-temperature, and space-constrained voltage reference designs.
Availability
1N5280BUR-1/TR is available at Aetrix Electronics and suitable for industrial power supplies, aerospace voltage clamps, downhole sensor bias networks, and high-temperature test equipment requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N5280BUR-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 analog and mixed-signal ICs, discrete devices, and radiation-hardened components.
The 1N52xxBUR-1 series belongs to Microsemi's legacy Zener regulator product line, engineered specifically for mission-critical voltage reference and protection in aerospace, defense, and industrial systems demanding hermetic packaging and extended temperature operation.
FAQ
What is the Zener voltage tolerance of the 1N5280BUR-1/TR?
The 1N5280BUR-1/TR has a nominal Zener voltage of 190 V with a tolerance of ±5%, indicated by the "B" suffix in the part number per Microsemi's nomenclature. This tolerance applies at 25 °C with IZT = 0.66 mA and remains stable across its full operating temperature range due to its metallurgically bonded construction.
Does the 1N5280BUR-1/TR support RoHS compliance?
Yes, the 1N5280BUR-1/TR is RoHS compliant (designated by the "e3" suffix in full nomenclature), with annealed matte-tin plating on both end caps. RoHS compliance is available for commercial-grade units only and meets JEDEC J-STD-609A Class 3 requirements for lead-free solderability.
What is the maximum reverse leakage current for the 1N5280BUR-1/TR?
The 1N5280BUR-1/TR specifies a maximum reverse leakage current (IR) of 0.1 µA at VR = 144 V and 25 °C. This ultra-low leakage enables use in high-impedance bias networks and precision reference dividers where standby current must remain below 100 nA.
Can the 1N5280BUR-1/TR be used in radiation-intensive environments?
Yes, the 1N5280BUR-1/TR is inherently radiation hard per Microsemi MicroNote 050, validated for total ionizing dose (TID) resilience without parameter shift. It is routinely selected for satellite power systems and nuclear instrumentation where displacement damage and single-event effects must be mitigated.
What is the thermal resistance of the 1N5280BUR-1/TR package?
The 1N5280BUR-1/TR in DO-213AA package has a thermal resistance of RθJA = 250 °C/W when mounted on FR4 with 1 oz copper and the recommended footprint, and RθJEC = 100 °C/W junction-to-end-cap. Derating begins above 50 °C ambient or 125 °C end-cap temperature to maintain 500 mW dissipation capability.
1N5280BUR-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):
- 190 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 2400 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 144 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
1N5280BUR-1/TR FAQ
1.How can I place an order for 1N5280BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5280BUR-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 1N5280BUR-1/TR reliable?
The price and inventory of 1N5280BUR-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 1N5280BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5280BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5280BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5280BUR-1/TR?
1N5280BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5280BUR-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 1N5280BUR-1/TR?
For technical support, including 1N5280BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5280BUR-1/TR requirements.
6.How does Aetrix verify that 1N5280BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5280BUR-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 1N5280BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5280BUR-1/TR?
All 1N5280BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5280BUR-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 1N5280BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5280BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5280BUR-1/TR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
