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Microchip Technology 1N5281BE3/TR
- Part No.:
- 1N5281BE3/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5281BE3/TR.pdf
- Description:
- DIODE ZENER 200V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:4,597
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Product details
Overview
1N5281BE3/TR from Microsemi is a 200 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 160 V and 7000 Ω max zener impedance at 0.25 mA, used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5281BE3/TR datasheet, 1N5281BE3/TR pinout, 1N5281BE3/TR application, or 1N5281BE3/TR equivalent, key selection criteria include nominal Zener voltage (200 V), tight ±5% tolerance (B suffix), RoHS-compliant matte-tin plating (e3), tape-and-reel packaging (TR), and thermal resistance of 310 °C/W on FR4 board.
Technical Context
The 1N5281BE3/TR operates as a two-terminal voltage reference device with sharp reverse breakdown knee, characterized by low dynamic impedance (7000 Ω at IZK = 0.25 mA) and stable temperature coefficient (+0.110 %/°C). It maintains regulation across wide current range (0.25–0.65 mA test points) and extreme ambient temperatures (−65 °C to +175 °C).
Its DO-35 glass package provides hermetic sealing, ESD insensitivity per MIL-STD-750 Method 1020, and inherent radiation hardness per MicroNote 050. The cathode band marking enables unambiguous polarity identification for correct biasing in shunt regulation circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 200 V @ IZT = 0.65 mA - defines precise regulation point for high-voltage reference applications |
| Zener Tolerance | ±5% (B suffix) - ensures predictable voltage accuracy without post-selection or trimming |
| Power Dissipation | 500 mW at 25 °C - supports stable operation in compact through-hole designs with derating above 50 °C |
| Max Reverse Current | 0.1 μA @ VR = 160 V - guarantees minimal leakage in high-impedance bias networks |
| Zener Impedance | 7000 Ω @ IZK = 0.25 mA - indicates moderate dynamic resistance suitable for low-current references |
| Temp. Coefficient | +0.110 %/°C - quantifies voltage drift over temperature for stability-critical calibration circuits |
| Operating Temp. | −65 °C to +175 °C - enables use in aerospace, downhole, and military environments |
Pinout & Package
DO-35 (DO-204AH) glass axial-leaded package with hermetically sealed body, tin-lead or RoHS-compliant matte-tin plating, cathode indicated by single black band. Leads are flexible axial terminals suitable for manual or wave soldering (260 °C/10 s max).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to circuit ground or lower potential node in shunt regulator configuration |
| Cathode | Banded end | Connected to input voltage source; reverse-biased to maintain regulated output at cathode potential |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N5281B | Guarantees full six-parameter electrical compliance (VZ, IR, ZZT, ZZK, αVZ, VF) per industry standard |
| RoHS-compliant plating (e3) | Meets EU Directive 2011/65/EU with annealed matte-tin finish, solderable per MIL-STD-750 Method 2026 |
| Tape-and-reel packaging (TR) | Enables automated SMT-compatible placement despite axial-leaded form factor via carrier tape handling |
| Radiation-hardened design | Inherently resistant to total ionizing dose per MicroNote 050 - validated for space-grade reliability |
| ESD-insensitive construction | No special handling required; withstands MIL-STD-750 Method 1020 without parameter shift |
Applications
| Industrial Power Supply Reference | Aerospace Voltage Monitor |
|---|---|
Use Scenario: Stable 200 V reference in isolated feedback loop of 400 V DC-DC converter for factory automation PLCs. IC Role / Device Role / Timing Role: Shunt voltage reference providing error signal to optocoupler-driven PWM controller. Use Value: ±5% tolerance and −65 °C to +175 °C operation ensure consistent regulation across wide input line and ambient variations. |
Use Scenario: Overvoltage clamp in satellite power bus monitoring circuit exposed to radiation and thermal cycling. IC Role / Device Role / Timing Role: Protective Zener element clamping transient spikes above 200 V to safeguard downstream ADC inputs. Use Value: Inherent radiation hardness and 0.1 μA leakage at 160 V prevent false triggering or degradation in orbit. |
| Military Equipment Calibration | Downhole Oilfield Sensor Bias |
Use Scenario: Precision voltage reference in portable field-tester calibrating multimeters and oscilloscopes to MIL-STD-45662A. IC Role / Device Role / Timing Role: Primary reference source for 200 V range, traceable to NIST standards via B-suffix tolerance. Use Value: +0.110 %/°C tempco allows accurate compensation algorithms in handheld environmental testing gear. |
Use Scenario: Bias voltage generator for piezoresistive pressure transducers operating at 150 °C in oil well drill collars. IC Role / Device Role / Timing Role: High-temperature-stable Zener supplying excitation voltage to sensor bridge. Use Value: Hermetic DO-35 glass package and 175 °C max rating prevent seal failure or parameter drift under sustained thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5281B-TR | No e3 RoHS suffix; uses traditional tin-lead plating | Restricted to non-RoHS-compliant legacy military programs requiring Pb-based solder compatibility | Select only when lead-free compliance is not required and tin-lead assembly is mandated |
| MMBZ5281B-7-F | SOT-23 surface-mount package; same 200 V/±5%/500 mW specs but lower thermal resistance (300 °C/W) | Used in space-constrained PCBs where axial leads are incompatible with automated pick-and-place or density targets | Choose for high-volume production with reflow-only processes; verify layout clearance for 200 V creepage |
Compared with 1N5281BE3/TR, the 1N5281B-TR lacks RoHS compliance but offers identical electrical performance and legacy solder compatibility, while MMBZ5281B-7-F delivers identical regulation in a smaller footprint at the cost of reduced high-temp reliability margin and different thermal path design requirements.
Availability
1N5281BE3/TR is available at Aetrix Electronics and suitable for industrial power supply reference, aerospace voltage monitor, and military equipment calibration requiring stable component supply with guaranteed long-term continuity.
Supply support for 1N5281BE3/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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N52xxB series was designed specifically for mission-critical voltage reference and protection applications demanding extended temperature range, radiation tolerance, and JEDEC-verified parametric consistency.
FAQ
What is the Zener voltage tolerance of the 1N5281BE3/TR?
The 1N5281BE3/TR has a nominal Zener voltage of 200 V with a guaranteed tolerance of ±5%, indicated by the "B" suffix in the part number. This tolerance applies across the full operating temperature range (−65 °C to +175 °C) and is verified per JEDEC standards for all six electrical parameters, including VZ, IR, ZZT, ZZK, αVZ, and VF.
Does the 1N5281BE3/TR require special handling for ESD sensitivity?
No, the 1N5281BE3/TR is nonsensitive to ESD per MIL-STD-750 Method 1020 and does not require static-control handling procedures. Its glass DO-35 construction and internal structure inherently dissipate electrostatic discharge without parameter shift or damage, making it suitable for standard bench and production environments.
What is the maximum reverse current specification for the 1N5281BE3/TR?
The 1N5281BE3/TR specifies a maximum reverse current (IR) of 0.1 μA at VR = 160 V, measured at 25 °C after 20 seconds of stabilization. This low leakage ensures minimal loading in high-impedance reference networks and supports accurate voltage sensing in precision instrumentation circuits using the 1N5281BE3/TR.
Can the 1N5281BE3/TR be used in high-temperature environments like downhole oilfield tools?
Yes, the 1N5281BE3/TR is rated for continuous operation from −65 °C to +175 °C and features a hermetically sealed DO-35 glass package. Its thermal resistance of 310 °C/W on FR4 and inherent radiation hardness per MicroNote 050 make it suitable for downhole sensor biasing and other extreme-environment applications where the 1N5281BE3/TR must maintain regulation stability under thermal stress.
What does the "e3" and "TR" suffix indicate in 1N5281BE3/TR?
The "e3" suffix denotes RoHS-compliant matte-tin plating per EU Directive 2011/65/EU, while "TR" indicates tape-and-reel packaging per EIA-296 standard. Together, they specify a lead-free, automated-handling-ready version of the 1N5281BE3/TR that maintains full electrical equivalence to the base 1N5281B part while meeting modern environmental and manufacturing requirements.
1N5281BE3/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):
- 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:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5281BE3/TR FAQ
1.How can I place an order for 1N5281BE3/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5281BE3/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 1N5281BE3/TR reliable?
The price and inventory of 1N5281BE3/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5281BE3/TR is usually 5 days.
3.What payment methods are accepted for 1N5281BE3/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5281BE3/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5281BE3/TR?
1N5281BE3/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5281BE3/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 1N5281BE3/TR?
For technical support, including 1N5281BE3/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5281BE3/TR requirements.
6.How does Aetrix verify that 1N5281BE3/TR is sourced from the original manufacturer or authorized distributors?
All 1N5281BE3/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 1N5281BE3/TR meets industry standards.
7.What is the process for return or replacement of 1N5281BE3/TR?
All 1N5281BE3/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5281BE3/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 1N5281BE3/TR part is unused and in its original packaging.
Return procedure for 1N5281BE3/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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