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Microchip Technology 1N5265A/TR
- Part No.:
- 1N5265A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5265A/TR.pdf
- Description:
- DIODE ZENER 62V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:5,051
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Product details
Overview
1N5265A/TR from Microsemi is a 62 V, ±10% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 2.0 mA test current, 1400 Ω dynamic impedance at 0.25 mA, and operating from –65 °C to +175 °C - used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5265A/TR datasheet, 1N5265A/TR pinout, 1N5265A/TR application, or 1N5265A/TR equivalent, key selection criteria include Zener voltage tolerance (±10%), thermal resistance (310 °C/W on FR4), low leakage (<0.1 µA at 49.6 V), and RoHS-compliant tin plating with tape-and-reel packaging (TR suffix).
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage across wide current (0.25–20 mA) and temperature (–65 °C to +175 °C) ranges. Its DO-35 glass package provides hermetic sealing and inherent radiation hardness per MicroNote 050.
It exhibits a positive temperature coefficient of +0.097 %/°C above 6.8 V, minimal junction capacitance (typ. <2 pF), and ESD insensitivity per MIL-STD-750 Method 1020 - enabling reliable use in harsh-environment analog regulation without external biasing circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V nominal at 2.0 mA test current - defines regulated output voltage under standard bias conditions. |
| Tolerance | ±10% (A suffix) - guarantees VZ between 55.8 V and 68.2 V at 25 °C, critical for margin-based protection design. |
| Power Dissipation | 500 mW at 25 °C, derated linearly to 0 W at 175 °C - sets maximum continuous power handling on PCB or lead mount. |
| Zener Impedance | 1400 Ω at IZK = 0.25 mA - indicates voltage regulation stability under light-load or transient conditions. |
| Reverse Leakage | <0.1 µA at 49.6 V (80% of VZ) - ensures minimal standby current in high-impedance reference paths. |
| Temp. Coefficient | +0.097 %/°C - quantifies VZ drift with temperature; enables accurate compensation in wide-temp designs. |
| Forward Voltage | ≤1.5 V at 200 mA - defines conduction threshold when used bidirectionally or in clamp configurations. |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode indicated by color band; leads 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; forward conduction path when biased positively relative to cathode. |
| Cathode | Banded end | Connected to higher-potential node during Zener operation; defines polarity for voltage regulation and clamping. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered DO-35 construction | Ensures mechanical interchangeability and standardized mounting across legacy and new designs. |
| Inherent radiation hardness | Validated per MicroNote 050 - supports use in aerospace, defense, and nuclear instrumentation without shielding. |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling and assembly. |
| Minimal junction capacitance | Typ. <2 pF (per Figure 2) - preserves high-frequency signal integrity in RF detector or fast-clamp applications. |
| Tape-and-reel packaging (TR) | Complies with EIA-296 standard - enables automated SMT placement despite axial-leaded form factor. |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing reference voltage for feedback loops in 48 V telecom DC-DC converters operating at –40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: Zener voltage reference providing stable 62 V setpoint to error amplifier input. Use Value: ±10% tolerance and +0.097 %/°C TC enable predictable loop gain margin across full temperature range without trimming. |
Use Scenario: Clamping surge transients on 48 V battery backup lines in railway signaling systems. IC Role / Device Role / Timing Role: Shunt overvoltage protector diverting >68.2 V spikes to ground before downstream MOSFET gate damage. Use Value: 500 mW power rating and –65 °C to +175 °C operating range ensure survivability during repeated 100 V/10 ms surges in outdoor enclosures. |
| High-Temperature Sensor Interface | Legacy Equipment Voltage Reference |
Use Scenario: Providing excitation voltage to RTD bridges in oil-well downhole tools exposed to 150 °C ambient. IC Role / Device Role / Timing Role: Precision Zener reference generating stable bias for Wheatstone bridge amplification. Use Value: Hermetic DO-35 glass package and radiation hardness prevent parameter drift or failure under prolonged thermal stress and gamma exposure. |
Use Scenario: Replacing obsolete 1N5265 in military-grade test equipment requiring long-term calibration stability. IC Role / Device Role / Timing Role: Fixed-voltage reference in analog meter movement driver circuits. Use Value: JEDEC registration and identical DO-35 footprint allow drop-in replacement without board rework or recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5265B/TR | ±5% tolerance (vs. ±10% for A suffix); same VZ, package, and thermal specs. | Higher accuracy required in closed-loop feedback where tighter VZ margin reduces gain error. | Select 1N5265B/TR when system-level voltage tolerance budget permits tighter regulation and cost premium is acceptable. |
| MMBZ5265B-TP (Micro Commercial) | SOT-23 surface-mount package; same 62 V/±5%; 350 mW PD; higher thermal resistance (400 °C/W). | Used in space-constrained PCBs where axial leads are incompatible with automated assembly or layout density. | Choose MMBZ5265B-TP only if board real estate or reflow compatibility outweighs reduced power handling and thermal performance. |
Compared with 1N5265A/TR, the 1N5265B/TR offers improved voltage accuracy at identical thermal and mechanical behavior, while the MMBZ5265B-TP trades power rating and thermal efficiency for surface-mount compatibility - making the original 1N5265A/TR optimal for high-reliability through-hole applications demanding robustness over miniaturization.
Availability
1N5265A/TR is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection circuits, high-temperature sensor interfaces, and legacy equipment voltage reference applications requiring stable component supply and long-lifecycle support.
Supply support for 1N5265A/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, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N52xx series was designed as a JEDEC-standardized family of general-purpose Zener diodes delivering stable voltage regulation across extreme temperatures and radiation environments - targeting mission-critical analog infrastructure.
FAQ
What is the Zener voltage tolerance of the 1N5265A/TR?
The 1N5265A/TR has a nominal Zener voltage of 62 V with a guaranteed tolerance of ±10%, meaning its actual breakdown voltage falls between 55.8 V and 68.2 V at 25 °C and 2.0 mA test current. This tolerance is defined by the "A" suffix per Microsemi's datasheet and applies to all units in the production lot without binning.
Does the 1N5265A/TR require heatsinking in typical applications?
No, the 1N5265A/TR does not require external heatsinking in standard applications. Its 500 mW power rating at 25 °C and thermal resistance of 310 °C/W on FR4 (with specified copper pad geometry) allows safe operation up to ~70 °C ambient without additional thermal management - provided average dissipation remains below derated limits per Figure 1.
Is the 1N5265A/TR RoHS compliant?
Yes, the 1N5265A/TR is RoHS compliant. The "e3" designation in Microsemi's part numbering system indicates RoHS-compliant annealed matte-tin plating, and the TR suffix confirms tape-and-reel packaging compliant with EIA-296. Full compliance documentation is available upon request from Aetrix Electronics.
What is the maximum reverse leakage current for the 1N5265A/TR?
The maximum reverse leakage current for the 1N5265A/TR is 0.1 µA measured at 49.6 V (80% of nominal 62 V Zener voltage), per the Electrical Characteristics table on page 1 of the Microsemi datasheet. This value is guaranteed across the full operating temperature range and reflects worst-case parametric spread.
Can the 1N5265A/TR be used in place of the 1N5265B/TR?
Yes, the 1N5265A/TR can be substituted for the 1N5265B/TR in applications tolerant of ±10% Zener voltage variation instead of ±5%. Both share identical DO-35 package, thermal characteristics, and electrical ratings except tolerance - but system-level validation is required to confirm that the wider tolerance does not impact regulation accuracy or protection thresholds.
1N5265A/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):
- 62 V
- Tolerance:
- ±10%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 185 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 45 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)
1N5265A/TR FAQ
1.How can I place an order for 1N5265A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5265A/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 1N5265A/TR reliable?
The price and inventory of 1N5265A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5265A/TR is usually 5 days.
3.What payment methods are accepted for 1N5265A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5265A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5265A/TR?
1N5265A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5265A/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 1N5265A/TR?
For technical support, including 1N5265A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5265A/TR requirements.
6.How does Aetrix verify that 1N5265A/TR is sourced from the original manufacturer or authorized distributors?
All 1N5265A/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 1N5265A/TR meets industry standards.
7.What is the process for return or replacement of 1N5265A/TR?
All 1N5265A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5265A/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 1N5265A/TR part is unused and in its original packaging.
Return procedure for 1N5265A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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