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Microchip Technology 1N5265A
- Part No.:
- 1N5265A
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5265A.pdf
- Description:
- DIODE ZENER 62V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,942
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Product details
Overview
1N5265A 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 and 1400 Ω dynamic impedance at 0.25 mA, operating from −65 °C to +175 °C - used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5265A datasheet, 1N5265A pinout, 1N5265A application, or 1N5265A equivalent, key selection criteria include Zener voltage tolerance, temperature coefficient (+0.097 %/°C), thermal resistance (250 °C/W junction-to-lead), low leakage (<0.1 μA at 47.5 V), and MIL-PRF-19500 screening compatibility with MQ/MX/MV prefixes.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable output 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 minimal capacitance (typ. <2 pF at 0 V, per Figure 2), nonsensitive ESD behavior (MIL-STD-750 Method 1020), and forward voltage ≤1.5 V at 200 mA - enabling use in low-noise analog references and transient-suppressed bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V nominal at 2.0 mA test current - defines regulation setpoint in shunt regulator circuits |
| Tolerance | ±10% (A suffix) - ensures voltage stability within 55.8–68.2 V at 25 °C under specified IZT |
| Power Dissipation | 500 mW at 25 °C, derated linearly to zero at 175 °C - limits continuous thermal load on PCB traces |
| Zener Impedance | 1400 Ω at IZK = 0.25 mA - determines regulation sensitivity to current variation near knee |
| Temp. Coefficient (αVZ) | +0.097 %/°C - quantifies voltage drift with ambient temperature change in high-stability designs |
| Reverse Leakage (IR) | <0.1 μA at 47.5 V - minimizes standby current loss in battery-powered voltage monitors |
| Operating Temp. | −65 °C to +175 °C - supports aerospace, downhole, and industrial environments without derating |
Pinout & Package
Hermetically sealed DO-35 (DO-204AH) glass axial-leaded package with cathode band marking; 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; carries reverse leakage and forward conduction current |
| Cathode | Banded end | Connected to regulated voltage node; sustains reverse breakdown at VZ = 62 V |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with JEDEC 1N52xx standard for interchangeability and guaranteed VZ, IR, VF limits |
| MIL-PRF-19500 screening option | Supports JAN/JANTX/JANTXV/JANS qualification via MQ/MX/MV/MSP prefixes with "-1" suffix |
| Low capacitance | Typ. <2 pF (per Figure 2) - preserves signal integrity in RF bias and high-frequency reference paths |
| Radiation-hardened | Inherently radiation tolerant per MicroNote 050 - suitable for space-grade and nuclear instrumentation |
| ESD robustness | Nonsensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling |
Applications
| Industrial Power Supply Feedback | Aerospace Voltage Reference |
|---|---|
Use Scenario: Shunt regulation in isolated flyback converter feedback network using optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Zener reference establishing precise 62 V threshold for error signal clamping and loop stability. Use Value: ±10% tolerance and +0.097 %/°C tempco enable stable regulation across −40 °C to +85 °C operating range without trimming. |
Use Scenario: Primary voltage reference in satellite power management unit requiring long-term stability under radiation exposure. IC Role / Device Role / Timing Role: Radiation-hardened Zener providing fault-tolerant 62 V reference for ADC input scaling and overvoltage latch detection. Use Value: Inherent radiation hardness (MicroNote 050) and −65 °C to +175 °C operation eliminate need for shielding or thermal compensation. |
| Automotive Battery Monitor | Test Equipment Calibration |
Use Scenario: Overvoltage clamp in 48 V mild-hybrid vehicle battery monitoring IC input stage. IC Role / Device Role / Timing Role: Transient suppression and voltage limiting for analog front-end protection against load-dump spikes. Use Value: 500 mW power rating and 0.1 μA leakage at 47.5 V ensure reliable clamping without parasitic loading during sleep mode. |
Use Scenario: Precision voltage standard in portable multimeter calibration circuitry. IC Role / Device Role / Timing Role: Stable 62 V reference source for DAC output verification and ADC full-scale adjustment. Use Value: Low dynamic impedance (1400 Ω at 0.25 mA) and tight tempco minimize measurement drift during extended calibration cycles. |
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 | ±5% tolerance (vs. ±10% for 1N5265A); same VZ, IZT, package, and tempco | Higher accuracy required in lab-grade instrumentation where tighter initial tolerance reduces calibration burden | Select 1N5265B when absolute voltage accuracy at 25 °C is prioritized over cost; no PCB changes needed |
| MMBZ5265B (SOT-23) | Surface-mount MMBZ5265B offers same 62 V/±5% spec but in SOT-23 package; lower power (350 mW), higher thermal resistance | Suitable for space-constrained consumer electronics; not rated for −65 °C or radiation environments | Choose MMBZ5265B only for commercial-grade, high-volume PCBs where reflow compatibility and footprint reduction outweigh ruggedness needs |
Compared with 1N5265B and MMBZ5265B, the 1N5265A delivers optimal balance of military-grade reliability, wide temperature operation, and cost efficiency for industrial and aerospace shunt regulation - while offering lower leakage and superior thermal performance than the SOT-23 alternative.
Availability
1N5265A is available at Aetrix Electronics and suitable for industrial power supplies, aerospace voltage references, automotive battery monitors, and test equipment calibration requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N5265A 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 precision voltage regulation in mission-critical systems where long-term stability, extreme environmental resilience, and MIL-qualified screening are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5265A?
The 1N5265A 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 2.0 mA test current and 25 °C. This tolerance is defined by the "A" suffix per JEDEC specification and applies to all units in the batch without individual sorting.
Does the 1N5265A support military-grade screening?
Yes, the 1N5265A supports MIL-PRF-19500 screening when ordered with appropriate prefixes: MQ (JAN), MX (JANTX), MV (JANTXV), or MSP (JANS), always paired with the "-1" suffix (e.g., MQ1N5265A-1). These versions undergo rigorous environmental and electrical testing per military standards for aerospace and defense applications.
What is the maximum reverse leakage current for the 1N5265A?
The 1N5265A specifies a maximum reverse leakage current (IR) of 0.1 μA when measured at 47.5 V (76.6% of VZ) - well below the 1.0 μA typical limit for many Zeners. This ultra-low leakage enables use in battery-backed circuits and high-impedance sensing nodes where standby current must be minimized.
Can the 1N5265A be used in surface-mount designs?
No - the 1N5265A is exclusively packaged in the axial-leaded DO-35 (DO-204AH) glass body. For surface-mount equivalents, Microsemi offers the MLL5265B in DO-213AA (MELF) package, which shares identical electrical specs but requires different board layout and reflow profile due to its cylindrical geometry and metallized ends.
What is the thermal resistance of the 1N5265A?
The 1N5265A has a junction-to-lead thermal resistance of 250 °C/W when measured at 3/8 inch (10 mm) lead length from the glass body. When mounted on an FR4 PCB with 4 mm² copper pads and 1 mm track width, its junction-to-ambient thermal resistance is 310 °C/W - critical for calculating safe operating area under sustained power dissipation.
1N5265A 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):
- 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 FAQ
1.How can I place an order for 1N5265A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5265A 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 reliable?
The price and inventory of 1N5265A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5265A is usually 5 days.
3.What payment methods are accepted for 1N5265A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5265A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5265A?
1N5265A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5265A 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?
For technical support, including 1N5265A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5265A requirements.
6.How does Aetrix verify that 1N5265A is sourced from the original manufacturer or authorized distributors?
All 1N5265A 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 meets industry standards.
7.What is the process for return or replacement of 1N5265A?
All 1N5265A units undergo pre-shipment inspection (PSI). If there is an issue with 1N5265A, 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 part is unused and in its original packaging.
Return procedure for 1N5265A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5265A Tags
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MMBZ5240B-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
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