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Microchip Technology 1N5280BE3/TR
- Part No.:
- 1N5280BE3/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5280BE3/TR.pdf
- Description:
- DIODE ZENER 190V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:8,158
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Product details
Overview
1N5280BE3/TR from Microsemi is a 190 V, ±5% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for operation from −65 °C to +175 °C, with 0.1 μA max reverse current at 152 V and 10 Ω max zener impedance at 0.25 mA test current - used for precision voltage reference and overvoltage clamping in industrial power supplies.
For engineers reviewing the 1N5280BE3/TR datasheet, 1N5280BE3/TR pinout, 1N5280BE3/TR application, or 1N5280BE3/TR equivalent, key selection criteria include its 190 V nominal zener voltage, tight ±5% tolerance (B suffix), RoHS-compliant matte-tin plating (e3), tape-and-reel packaging (TR), and radiation-hardened construction per MicroNote 050.
Technical Context
This device operates as a two-terminal voltage regulator in reverse-biased mode, with zener breakdown characterized by a sharp knee and stable regulation across 0.25 mA to 20 mA operating current. Its temperature coefficient of +0.110 %/°C (measured from 25 °C to 125 °C at rated IZT) ensures predictable drift behavior in high-temperature environments.
Designed for axial-leaded through-hole mounting, the 1N5280BE3/TR features hermetically sealed glass encapsulation, nonsensitive ESD performance (MIL-STD-750 Method 1020), and minimal junction capacitance - enabling reliable use in low-noise analog references and transient suppression circuits where thermal stability and long-term parametric consistency are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 190 V @ 0.66 mA test current - defines precise regulation point for high-voltage reference designs |
| Zener Tolerance | ±5% (B suffix) - guarantees output voltage within 180.5–199.5 V at 25 °C under specified test conditions |
| Power Dissipation | 500 mW at 25 °C, derated linearly to zero at 175 °C - sets maximum continuous power handling in ambient-constrained layouts |
| Max Reverse Current | 0.1 μA @ 152 V - ensures negligible leakage in high-impedance bias networks and standby monitoring circuits |
| Zener Impedance | 10 Ω @ IZK = 0.25 mA - supports stable regulation under light-load conditions typical in sensor excitation and reference buffers |
| Operating Temperature | −65 °C to +175 °C - enables deployment in aerospace, downhole, and military systems without derating penalties |
| Thermal Resistance | 250 °C/W junction-to-lead (3/8″ lead length) - informs heatsinking requirements for sustained high-current operation |
Pinout & Package
DO-35 (DO-204AH) glass axial-lead package: hermetically sealed cylindrical glass body with tinned copper alloy leads; cathode identified by single black band; polarity must be observed - banded end positive for Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded lead | Connected to circuit ground or lower-potential node during Zener operation |
| Cathode | Banded lead | Connected to regulated voltage node; reverse-biased to maintain 190 V reference |
Key Features
| Feature | Design Value |
|---|---|
| Radiation hardness | Inherently radiation-hard per MicroNote 050 - suitable for space-grade and nuclear instrumentation applications without additional shielding |
| ESD immunity | Nonsensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling and assembly |
| RoHS compliance | Matte-tin plating per e3 suffix - meets EU RoHS Directive 2011/65/EU without compromising solderability or reliability |
| Tape-and-reel packaging | Standard EIA-296 format with TR suffix - enables automated pick-and-place for high-volume manufacturing |
| Stable tempco | +0.110 %/°C (25–125 °C) - allows accurate high-temperature voltage reference modeling and compensation |
Applications
| High-Voltage Power Supply Reference | Overvoltage Clamp in Telecom Line Cards |
|---|---|
|
Use Scenario: Stabilizing feedback voltage in 200 V DC-DC converter output stage. IC Role / Device Role / Timing Role: Zener diode provides fixed 190 V reference for error amplifier input. Use Value: Tight ±5% tolerance and low 10 Ω dynamic impedance ensure <±0.5% output regulation accuracy across load and temperature. |
Use Scenario: Protecting line interface ICs from lightning-induced surges on -48 V telecom distribution lines. IC Role / Device Role / Timing Role: Clamps transient voltages above 190 V to prevent damage to downstream transceivers. Use Value: 500 mW power rating and −65 °C to +175 °C operating range support robust surge handling in outdoor cabinets. |
| Industrial Sensor Excitation Reference | Aerospace Avionics Voltage Monitor |
|
Use Scenario: Generating stable excitation voltage for high-impedance piezoresistive pressure sensors in oilfield equipment. IC Role / Device Role / Timing Role: Serves as low-drift, low-capacitance voltage source for ratiometric measurement bridges. Use Value: Minimal capacitance and radiation-hardened construction ensure signal integrity and long-term calibration stability in harsh environments. |
Use Scenario: Monitoring 200 V bus voltage in flight control power distribution units. IC Role / Device Role / Timing Role: Functions as primary overvoltage detection element feeding comparator inputs. Use Value: Guaranteed operation up to +175 °C and inherent radiation hardness meet DO-160E Section 22 and MIL-STD-883 Class B requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5280BRLG | Same 190 V, ±5%, DO-35 package, but lead-free matte-tin plating without e3 designation; no TR tape-and-reel option | Lacks RoHS-compliant e3 marking and tape-and-reel packaging - unsuitable for automated SMT lines requiring EIA-296 compliance | Select when legacy leaded assembly or manual placement is used and RoHS documentation is not required |
| MMBZ5280B-TP | Surface-mount SOT-23 package, same 190 V/±5% spec, but only 225 mW power rating and −65 °C to +150 °C range | Lower power and reduced temperature capability limit use to low-power portable electronics, not industrial or aerospace | Select only for space-constrained PCBs where 500 mW dissipation and >150 °C operation are not needed |
Compared with 1N5280BE3/TR, 1N5280BRLG offers identical electrical specs but lacks RoHS traceability and tape-and-reel logistics, while MMBZ5280B-TP trades 500 mW capability and extended temperature range for miniaturization - making 1N5280BE3/TR the sole choice for high-reliability, high-power, high-temperature Zener regulation.
Availability
1N5280BE3/TR is available at Aetrix Electronics and suitable for high-voltage reference design, telecom surge protection, and aerospace voltage monitoring requiring stable component supply, full RoHS compliance, and extended temperature performance.
Supply support for 1N5280BE3/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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and high-voltage analog components for defense, aerospace, and industrial markets.
The 1N52xxB series was developed to deliver JEDEC-registered, high-stability Zener regulation across 2.4–200 V with military-grade screening options and extended temperature capability - targeting mission-critical power and sensing infrastructure.
FAQ
What is the nominal zener voltage and tolerance of the 1N5280BE3/TR?
The 1N5280BE3/TR has a nominal zener voltage of 190 V with a guaranteed tolerance of ±5%, indicated by the "B" suffix per JEDEC specification. This tolerance is verified at 25 °C with 0.66 mA test current and applies across the full operating temperature range of −65 °C to +175 °C as supported by its +0.110 %/°C temperature coefficient.
Does the 1N5280BE3/TR support automated assembly processes?
Yes, the 1N5280BE3/TR includes the "TR" suffix denoting standard EIA-296 tape-and-reel packaging, enabling compatibility with high-speed pick-and-place equipment. Its matte-tin plating (e3) ensures consistent solderability, and the DO-35 axial-lead form factor is supported by industry-standard feeders and vision alignment systems.
Is the 1N5280BE3/TR suitable for aerospace applications?
Yes, the 1N5280BE3/TR is inherently radiation-hard per MicroNote 050 and supports MIL-PRF-19500 screening levels (e.g., JANTXV) when ordered with appropriate prefixes. Its −65 °C to +175 °C operating range, hermetic glass package, and ESD immunity make it qualified for avionics power monitoring and satellite subsystems.
What is the maximum reverse leakage current for the 1N5280BE3/TR?
The 1N5280BE3/TR specifies a maximum reverse current (IR) of 0.1 μA at 152 V (80% of nominal 190 V), measured after 20 seconds of thermal stabilization. This ultra-low leakage supports high-impedance bias networks and precision reference circuits where current draw must remain below 100 nA.
How does the thermal resistance of the 1N5280BE3/TR affect PCB layout?
The 1N5280BE3/TR has a junction-to-lead thermal resistance of 250 °C/W at 3/8″ (10 mm) lead length. To maintain safe junction temperatures, PCB traces connected to its leads should use ≥1 mm width and ≥4 mm² copper pads, especially in high-ambient environments - otherwise, power derating per Figure 1 becomes necessary.
1N5280BE3/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- 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:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5280BE3/TR FAQ
1.How can I place an order for 1N5280BE3/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5280BE3/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 1N5280BE3/TR reliable?
The price and inventory of 1N5280BE3/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5280BE3/TR is usually 5 days.
3.What payment methods are accepted for 1N5280BE3/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5280BE3/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5280BE3/TR?
1N5280BE3/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5280BE3/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 1N5280BE3/TR?
For technical support, including 1N5280BE3/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5280BE3/TR requirements.
6.How does Aetrix verify that 1N5280BE3/TR is sourced from the original manufacturer or authorized distributors?
All 1N5280BE3/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 1N5280BE3/TR meets industry standards.
7.What is the process for return or replacement of 1N5280BE3/TR?
All 1N5280BE3/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5280BE3/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 1N5280BE3/TR part is unused and in its original packaging.
Return procedure for 1N5280BE3/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5280BE3/TR Tags
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