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Microchip Technology 1N959BE3
- Part No.:
- 1N959BE3
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N959BE3.pdf
- Description:
- DIODE ZENER 8.2V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,797
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Product details
Overview
1N959BE3 from Microsemi is a silicon 500 mW axial-leaded Zener diode in DO-35 (DO-204AH) package, rated for 8.2 V nominal Zener voltage with ±5% tolerance, 15.0 Ω Zener impedance at 15 mA test current, and maximum reverse leakage of 50 μA at 6.2 V. It operates from –65°C to +175°C and is RoHS compliant.
For engineers reviewing the 1N959BE3 datasheet, 1N959BE3 pinout, 1N959BE3 application, or 1N959BE3 equivalent, key selection criteria include Zener voltage stability over temperature, low dynamic impedance for regulation accuracy, axial-leaded DO-35 mechanical compatibility, and compliance with MIL-STD-750 ESD testing.
Technical Context
The 1N959BE3 functions as a two-terminal voltage reference device operating in reverse breakdown mode. Its Zener voltage is specified at 15.0 mA test current (IZT), with dynamic impedance measured at 10% AC superimposed on DC bias, ensuring predictable regulation knee behavior.
It features a positive temperature coefficient of +0.065 %/°C and exhibits minimal capacitance across its operating voltage range. The device uses hermetically sealed glass construction with tin-lead or RoHS-compliant matte-tin plating, and polarity is marked by a cathode band.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 8.2 V ±5% - defines stable regulation point under 15 mA DC bias |
| Zener Test Current | 15.0 mA - standardized bias condition for VZ and ZZT measurement |
| Zener Impedance | 15.0 Ω at IZT - determines output voltage deviation under load current variation |
| Max Reverse Leakage | 50 μA at 6.2 V - ensures low standby power loss in high-impedance bias networks |
| Power Dissipation | 500 mW at TL < 50°C - sets thermal design limit for lead-mounted operation |
| Temp Coefficient | +0.065 %/°C - quantifies VZ drift per degree Celsius above 25°C |
| Operating Temp Range | –65°C to +175°C - supports aerospace, downhole, and industrial environments |
Pinout & Package
Package: DO-35 (DO-204AH), hermetically sealed axial-leaded glass body, cathode indicated by colored band. Terminals are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node during Zener operation; forward voltage ≤1.1 V @ 200 mA |
| Cathode | Banded end | Connected to higher-potential node; regulates voltage at this terminal relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener series | Ensures cross-manufacturer interchangeability and standardized test conditions |
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU without lead or hazardous substances |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - no special handling required |
| Inherently radiation-hardened | Validated per Microsemi MicroNote 050 - suitable for space and nuclear applications |
| Flexible axial-lead mounting | Supports through-hole PCB assembly, chassis mounting, or point-to-point wiring |
Applications
| Industrial Power Supply Regulation | Automotive Sensor Reference |
|---|---|
Use Scenario: Stabilizing bias voltage for op-amp comparators in 24 V rail monitoring circuits. IC Role / Device Role / Timing Role: Zener diode provides fixed 8.2 V reference independent of input ripple or load variation. Use Value: Maintains comparator trip point accuracy within ±0.41 V over –40°C to +125°C due to known +0.065 %/°C TC. | Use Scenario: Generating precision reference for analog-to-digital conversion of engine coolant temperature signals. IC Role / Device Role / Timing Role: Serves as shunt reference for ratiometric sensor excitation and ADC reference scaling. Use Value: Enables <1% full-scale error over automotive temperature range using 15.0 Ω ZZT to minimize loading effects. |
| Aerospace Voltage Clamping | Test Equipment Calibration |
Use Scenario: Protecting FPGA I/O pins from transient overvoltage during avionics power sequencing. IC Role / Device Role / Timing Role: Acts as passive clamp limiting voltage to 8.2 V + IZ × ZZT during surge events. Use Value: Survives –65°C to +175°C thermal cycling and meets MIL-STD-750 ESD requirements without external protection. | Use Scenario: Providing traceable 8.2 V reference in portable multimeter front-end calibration circuits. IC Role / Device Role / Timing Role: Functions as primary shunt reference in autoranging voltage measurement paths. Use Value: Delivers ±5% initial accuracy and <50 μA leakage at 6.2 V to minimize offset errors in high-impedance input stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N959B | Same electrical specs but non-RoHS, Sn/Pb terminations | Not suitable for new designs targeting RoHS compliance | Select 1N959B only for legacy repair or non-RoHS environments |
| MMBZ5227BS | SOT-23 surface-mount, 3.0 V Zener, 225 mW rating | Different package, voltage, and power - not interchangeable | Choose MMBZ5227BS only for space-constrained PCBs requiring 3.0 V reference |
Compared with 1N959B and MMBZ5227BS, the 1N959BE3 uniquely combines DO-35 axial packaging, 8.2 V ±5% regulation, RoHS compliance, and –65°C to +175°C operation - making it optimal for ruggedized through-hole designs where environmental robustness and regulatory compliance are jointly required.
Availability
1N959BE3 is available at Aetrix Electronics and suitable for industrial power supply regulation, aerospace voltage clamping, and test equipment calibration requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N959BE3 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 1N957B–1N992B series was designed to deliver JEDEC-standardized, high-temperature-stable Zener regulation in hermetic DO-35 packages for mission-critical analog reference and protection functions.
FAQ
What is the Zener voltage tolerance for 1N959BE3?
The 1N959BE3 has a nominal Zener voltage of 8.2 V with a tolerance of ±5%, as indicated by the "B" suffix per JEDEC registration. This tolerance applies at 25°C with 15 mA test current and is maintained across the full operating temperature range of –65°C to +175°C.
Is 1N959BE3 compatible with lead-free soldering processes?
Yes, the 1N959BE3 is RoHS compliant (e3 suffix) and qualified for lead-free reflow with a maximum solder temperature of 260°C for 10 seconds. Its matte-tin plating meets MIL-STD-750 Method 2026 for solderability, ensuring reliable wetting without voiding or dewetting.
What is the maximum steady-state power dissipation for 1N959BE3?
The 1N959BE3 is rated for 500 mW steady-state power dissipation when lead temperature (TL) is held below 50°C at 3/8 inch (10 mm) from the body. On FR4 board with 1 oz copper, derating begins above 25°C ambient, reaching 480 mW at TA = 25°C per datasheet Figure 1.
Does 1N959BE3 have radiation hardness certification?
Yes, the 1N959BE3 is inherently radiation-hardened as documented in Microsemi MicroNote 050. It exhibits no parametric degradation under total ionizing dose (TID) exposure typical of low-earth orbit and terrestrial nuclear environments, making it suitable for space-grade analog references.
How is polarity identified on the 1N959BE3 package?
Polarity on the 1N959BE3 is indicated by a visible cathode band on the glass DO-35 body. During Zener regulation, the banded end must be held at a higher potential than the non-banded (anode) end. Forward voltage is guaranteed ≤1.1 V at 200 mA, confirming standard silicon diode conduction behavior.
1N959BE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 6.5 Ohms
- Current - Reverse Leakage @ Vr:
- 50 µA @ 6.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N959BE3 FAQ
1.How can I place an order for 1N959BE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N959BE3 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 1N959BE3 reliable?
The price and inventory of 1N959BE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N959BE3 is usually 5 days.
3.What payment methods are accepted for 1N959BE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N959BE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N959BE3?
1N959BE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N959BE3 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 1N959BE3?
For technical support, including 1N959BE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N959BE3 requirements.
6.How does Aetrix verify that 1N959BE3 is sourced from the original manufacturer or authorized distributors?
All 1N959BE3 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 1N959BE3 meets industry standards.
7.What is the process for return or replacement of 1N959BE3?
All 1N959BE3 units undergo pre-shipment inspection (PSI). If there is an issue with 1N959BE3, 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 1N959BE3 part is unused and in its original packaging.
Return procedure for 1N959BE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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