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Microchip Technology 1N5268BE3/TR
- Part No.:
- 1N5268BE3/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5268BE3/TR.pdf
- Description:
- DIODE ZENER 82V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:4,470
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Product details
Overview
1N5268BE3/TR from Microsemi is a 500 mW, 82 V, ±5% tolerance glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for operation from –65 °C to +175 °C, with 2000 Ω maximum zener impedance at 0.25 mA and 330 Ω at 1.5 mA test current - used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5268BE3/TR datasheet, 1N5268BE3/TR pinout, 1N5268BE3/TR application, or 1N5268BE3/TR equivalent, key selection criteria include zener voltage tolerance (±5% B-suffix), thermal resistance (250 °C/W junction-to-lead), low temperature coefficient (+0.098 %/°C), RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR suffix).
Technical Context
This device operates as a two-terminal voltage regulator in reverse-biased mode, with cathode band marking polarity. It delivers stable 82 V regulation across 0.25–1.5 mA test currents and maintains performance over –65 °C to +175 °C ambient range.
Its DO-35 glass package provides hermetic sealing, ESD insensitivity per MIL-STD-750 Method 1020, and minimal capacitance (typical <2 pF at 0 V). Thermal resistance is specified at 250 °C/W junction-to-lead with 3/8″ lead length, enabling reliable power dissipation up to 500 mW at 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 82 V @ 1.5 mA test current - defines primary regulation point for feedback loops and reference circuits. |
| Zener Tolerance | ±5% (B suffix) - ensures voltage accuracy within ±4.1 V at 25 °C for stable biasing in analog circuitry. |
| Power Dissipation | 500 mW at 25 °C - supports continuous regulation in low-power supply rails without forced cooling. |
| Zener Impedance | 330 Ω @ IZT = 1.5 mA; 2000 Ω @ IZK = 0.25 mA - indicates dynamic resistance affecting regulation stability under varying load. |
| Temperature Coefficient | +0.098 %/°C - quantifies voltage drift with temperature, critical for high-accuracy references over wide operating ranges. |
| Operating Temperature | –65 °C to +175 °C - enables use in aerospace, downhole, and automotive under-hood applications. |
| Forward Voltage | ≤1.5 V @ 200 mA - defines conduction threshold in forward direction for clamping or protection functions. |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-lead package with tin-lead or RoHS-compliant matte-tin plating; cathode identified by colored band; leads are flexible axial terminals suitable for through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node; conducts forward current when biased >1.5 V. |
| Cathode | Banded end | Connected to higher-potential node during Zener operation; regulates voltage at 82 V when reverse-biased. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N52xx series | Ensures industry-standard form, fit, and function compatibility across manufacturers and legacy designs. |
| RoHS-compliant "e3" suffix | Meets EU RoHS Directive 2011/65/EU with annealed matte-tin plating, eliminating lead in solderable finish. |
| Tape-and-reel "TR" packaging | Enables automated SMT placement despite axial-lead construction, supporting high-volume production. |
| Radiation-hardened design | Inherently radiation tolerant per MicroNote 050 - validated for total ionizing dose (TID) resilience in space-grade systems. |
| ESD-insensitive construction | Passes MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling and assembly. |
Applications
| Industrial Power Supply Reference | Automotive Engine Control Unit (ECU) Protection |
|---|---|
Use Scenario: Provides stable 82 V reference for feedback divider in isolated DC-DC converters powering PLC I/O modules. IC Role / Device Role / Timing Role: Zener diode acts as passive voltage reference and overvoltage clamp on secondary-side regulation loop. Use Value: ±5% tolerance and +0.098 %/°C tempco ensure output voltage remains within ±5.2 V over –40 °C to +85 °C operating range. | Use Scenario: Clamps transient spikes on 12 V battery rail during load-dump events in diesel engine control units. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbs surge energy above 82 V to protect downstream MCU and sensor interfaces. Use Value: 500 mW rating and –65 °C to +175 °C range support survival under extreme under-hood thermal cycling and ISO 7637-2 pulse 5a stress. |
| Aerospace Avionics Bias Network | Downhole Oil & Gas Sensor Conditioning |
Use Scenario: Sets bias point for op-amp input stages in inertial measurement unit (IMU) signal conditioning circuits. IC Role / Device Role / Timing Role: Precision Zener establishes fixed reference voltage for differential amplifiers measuring gyroscope outputs. Use Value: Radiation hardness per MicroNote 050 and 175 °C max rating enable uninterrupted operation in LEO satellite payloads. | Use Scenario: Regulates supply to piezoresistive pressure transducers deployed at 150 °C downhole environments in oil well logging tools. IC Role / Device Role / Timing Role: Primary voltage reference for analog front-end powering strain gauge bridges and ADC drivers. Use Value: Stable 82 V regulation with <2 pF capacitance minimizes noise coupling into high-impedance sensor signals at elevated temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5268BRLG | Same electrical specs; surface-mount MELF DO-213AA package instead of axial DO-35; no TR tape-and-reel option. | Requires PCB redesign for SMT vs. through-hole; better high-frequency performance due to lower inductance. | Select 1N5268BRLG only if board space constraints mandate SMT or RF noise immunity is prioritized over manual assembly flexibility. |
| MMBZ5268BLT1G | SOT-23 package; same 82 V, ±5%; lower 225 mW power rating; 1000 Ω Zzt @ 1.5 mA (vs. 330 Ω). | Not suitable for 500 mW continuous dissipation; limited to low-current biasing or transient clamping in portable electronics. | Choose MMBZ5268BLT1G only for space-constrained consumer devices where full 500 mW capability is unnecessary. |
Compared with 1N5268BE3/TR, 1N5268BRLG offers identical regulation but requires SMT rework, while MMBZ5268BLT1G sacrifices power handling and impedance for miniaturization - making 1N5268BE3/TR optimal for ruggedized, high-reliability through-hole designs demanding full 500 mW capability and low dynamic impedance.
Availability
1N5268BE3/TR is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECU protection circuits, and aerospace avionics requiring stable component supply with guaranteed long-term continuity and RoHS compliance.
Supply support for 1N5268BE3/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-temperature analog and mixed-signal components.
The 1N52xx series was designed for military, aerospace, and industrial applications requiring extended temperature operation, hermetic packaging, and JEDEC-standardized Zener regulation performance.
FAQ
What is the nominal Zener voltage and tolerance of the 1N5268BE3/TR?
The 1N5268BE3/TR has a nominal Zener voltage of 82 V with ±5% tolerance, indicated by the "B" suffix per Microsemi's documentation. This means the actual breakdown voltage falls between 77.9 V and 86.1 V at 25 °C under 1.5 mA test current, meeting JEDEC 1N5268B specifications.
Does the 1N5268BE3/TR have RoHS-compliant plating?
Yes, the "e3" suffix in 1N5268BE3/TR explicitly denotes RoHS-compliant annealed matte-tin plating per MIL-STD-750 Method 2026, replacing traditional tin-lead finishes while maintaining solderability and reliability in high-temperature environments.
What does the "TR" suffix indicate in 1N5268BE3/TR?
The "TR" suffix in 1N5268BE3/TR specifies tape-and-reel packaging per EIA-296 standard, enabling automated pick-and-place assembly despite its axial-lead DO-35 package - a key feature for high-volume manufacturing of industrial and automotive boards.
What is the maximum power dissipation and thermal resistance of the 1N5268BE3/TR?
The 1N5268BE3/TR has a maximum power dissipation of 500 mW at 25 °C, derating linearly above that temperature. Its thermal resistance is 250 °C/W junction-to-lead at 3/8″ (10 mm) lead length from the glass body, as confirmed in Microsemi's datasheet Figure 1 and Maximum Ratings table.
Is the 1N5268BE3/TR suitable for high-temperature applications like downhole oil & gas sensors?
Yes, the 1N5268BE3/TR is rated for operation from –65 °C to +175 °C and features inherent radiation hardness per MicroNote 050. Its DO-35 glass package and stable +0.098 %/°C temperature coefficient make it suitable for downhole sensor conditioning circuits where long-term reliability at sustained 150 °C is required.
1N5268BE3/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):
- 82 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 330 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 62 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)
1N5268BE3/TR FAQ
1.How can I place an order for 1N5268BE3/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5268BE3/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 1N5268BE3/TR reliable?
The price and inventory of 1N5268BE3/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5268BE3/TR is usually 5 days.
3.What payment methods are accepted for 1N5268BE3/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5268BE3/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5268BE3/TR?
1N5268BE3/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5268BE3/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 1N5268BE3/TR?
For technical support, including 1N5268BE3/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5268BE3/TR requirements.
6.How does Aetrix verify that 1N5268BE3/TR is sourced from the original manufacturer or authorized distributors?
All 1N5268BE3/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 1N5268BE3/TR meets industry standards.
7.What is the process for return or replacement of 1N5268BE3/TR?
All 1N5268BE3/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5268BE3/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 1N5268BE3/TR part is unused and in its original packaging.
Return procedure for 1N5268BE3/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5268BE3/TR Tags
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