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Microchip Technology 1N5260A
- Part No.:
- 1N5260A
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5260A.pdf
- Description:
- DIODE ZENER 43V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,213
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Product details
Overview
1N5260A from Microsemi is a 43 V, ±10% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 3.0 mA test current and 900 Ω dynamic impedance at 0.25 mA, operating from −65 °C to +175 °C. It serves as a precision voltage reference or shunt regulator in low-power analog circuits, power supply feedback paths, and overvoltage protection.
For engineers reviewing the 1N5260A datasheet, 1N5260A pinout, 1N5260A application, or 1N5260A equivalent, key selection criteria include its 43 V nominal Zener voltage, 10% tolerance (A suffix), 900 Ω Zener impedance at IZK = 0.25 mA, thermal resistance of 250 °C/W junction-to-lead, and DO-35 mechanical compatibility with axial-leaded PCB layouts.
Technical Context
This discrete Zener diode operates in reverse breakdown mode with cathode band indicating polarity. Its regulation stability relies on specified test current (IZT = 3.0 mA) and exhibits a +0.095 %/°C temperature coefficient above 25 °C, verified per JEDEC JESD24-A standards.
The device delivers stable voltage reference performance across wide temperature extremes (−65 °C to +175 °C) and maintains low leakage (<0.1 μA at VR = 34.4 V), with minimal capacitance typical for DO-35 glass packages and inherent radiation hardness per MicroNote 050.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 43 V @ IZT = 3.0 mA - defines regulated output voltage under standard test conditions |
| Zener Tolerance | ±10% (A suffix) - sets absolute voltage accuracy window: 38.7 V to 47.3 V |
| Power Dissipation | 500 mW at 25 °C - maximum steady-state power before thermal derating applies |
| Zener Impedance | 900 Ω @ IZK = 0.25 mA - indicates dynamic resistance near knee voltage; impacts regulation sensitivity to current changes |
| Max Reverse Current | 0.1 μA @ VR = 34.4 V - ensures low leakage below breakdown, critical for high-impedance bias networks |
| Temp Coefficient αVZ | +0.095 %/°C - quantifies voltage drift magnitude per degree rise above 25 °C |
| Operating Temperature | −65 °C to +175 °C - supports deployment in aerospace, downhole, and industrial environments |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode indicated by a single 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 | Reverse-biased reference node | Connected to lower-potential side of circuit; forms shunt path when cathode is held >43 V above anode |
| Cathode | Zener regulation terminal | Banded end; must be biased positive relative to anode to enter breakdown; carries full load current in shunt configuration |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with JEDEC JESD24-A for standardized 1N52xx series electrical and mechanical definitions |
| Hermetic glass construction | Ensures long-term parameter stability and moisture resistance without conformal coating |
| Radiation-hardened design | Inherently tolerant to total ionizing dose per MicroNote 050 - suitable for space-qualified systems |
| ESD-insensitive | Rated per MIL-STD-750 Method 1020 - no handling precautions required for static discharge |
| Flexible axial mounting | Leads support through-hole insertion and manual or automated axial lead forming per IPC-J-STD-001 |
Applications
| Industrial Power Supply Feedback | Automotive ECU Reference |
|---|---|
Use Scenario: Provides stable voltage reference for TL431-based adjustable linear regulators in 24 V industrial SMPS. IC Role / Device Role / Timing Role: Shunt reference element setting feedback divider ratio to maintain ±1% output regulation. Use Value: 43 V rating enables direct use with 24 V rail-derived bias supplies; ±10% tolerance accommodates cost-sensitive BOMs while maintaining loop stability. | Use Scenario: Supplies precise reference voltage to analog sensor signal conditioning circuits in engine control units. IC Role / Device Role / Timing Role: Zener-regulated bias source for op-amp input stages measuring throttle position or coolant temperature. Use Value: −65 °C to +175 °C operating range matches under-hood thermal requirements; low 0.1 μA leakage avoids loading high-impedance sensor bridges. |
| Aerospace Voltage Clamp | Test Equipment Calibration |
Use Scenario: Protects ADC inputs from transient overvoltage in satellite telemetry interface modules. IC Role / Device Role / Timing Role: Fast-response shunt clamp limiting input to 43 V during ESD or surge events. Use Value: Radiation hardness per MicroNote 050 ensures reliability in LEO missions; DO-35 form factor fits legacy board layouts requiring axial components. | Use Scenario: Serves as traceable voltage standard in benchtop multimeter calibration fixtures. IC Role / Device Role / Timing Role: Primary reference diode in stacked Zener reference chains for 10 V and 43 V calibration points. Use Value: Tight thermal coefficient (+0.095 %/°C) and low hysteresis enable repeatable measurements; DO-35 mechanical stability supports long-term aging studies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4750A | 47 V nominal, same 500 mW rating, DO-41 package (larger body, longer leads) | Higher voltage rating; less suitable where 43 V exact match is required for feedback loop gain | Select when board layout allows DO-41 footprint and 47 V regulation is acceptable |
| MMBZ5260B | 43 V nominal, ±5% tolerance (B suffix), SOT-23 surface-mount package, 200 mW rating | Smaller size and tighter tolerance, but lower power and different thermal profile | Select for space-constrained PCBs where 200 mW dissipation suffices and reflow compatibility is needed |
Compared with 1N5260A, 1N4750A offers higher Zener voltage in a mechanically distinct DO-41 package, while MMBZ5260B provides tighter tolerance and SMT compatibility at reduced power handling-neither is pin-compatible, and both require layout or thermal redesign.
Availability
1N5260A is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECUs, aerospace clamping circuits, and test equipment calibration requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N5260A 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 defense, aerospace, and industrial markets.
The 1N52xx series was designed as a JEDEC-standardized family of general-purpose, high-stability Zener diodes targeting applications demanding proven reliability, wide temperature operation, and hermetic packaging.
FAQ
What is the nominal Zener voltage and tolerance of the 1N5260A?
The 1N5260A has a nominal Zener voltage of 43 V with a ±10% tolerance, as indicated by the "A" suffix per Microsemi's documentation. This means the actual breakdown voltage falls between 38.7 V and 47.3 V at the specified test current of 3.0 mA. The tolerance is guaranteed per JEDEC JESD24-A, and the device is not rated for tighter tolerances unless marked with C (±2%) or D (±1%) suffixes.
What package type and mounting style does the 1N5260A use?
The 1N5260A uses the DO-35 (also designated DO-204AH) hermetically sealed glass axial-leaded package. It features flexible axial leads suitable for through-hole mounting, with cathode polarity marked by a single band. Lead finish is either tin-lead or RoHS-compliant matte-tin, solderable per MIL-STD-750 Method 2026, and compatible with standard wave or hand-soldering processes up to 260 °C for 10 seconds.
What is the Zener impedance of the 1N5260A and why does it matter?
The 1N5260A has a maximum Zener impedance (ZZK) of 900 Ω measured at IZK = 0.25 mA. This value reflects the dynamic resistance near the knee of the breakdown curve and directly affects regulation accuracy under varying load currents. A lower ZZK improves voltage stability; 900 Ω is typical for 43 V Zeners in this family and aligns with design expectations for low-power reference and clamp applications.
Can the 1N5260A operate reliably in high-temperature environments?
Yes, the 1N5260A is rated for continuous operation from −65 °C to +175 °C, making it suitable for under-hood automotive, downhole oil/gas, and aerospace applications. Its thermal resistance is 250 °C/W junction-to-lead at 3/8″ lead length, and derating begins above 25 °C ambient per Figure 1 in the datasheet. The device's radiation hardness (per MicroNote 050) further supports mission-critical thermal and radiation environments.
How does the temperature coefficient of the 1N5260A affect its performance?
The 1N5260A has a positive temperature coefficient (αVZ) of +0.095 %/°C, meaning its Zener voltage increases by approximately 0.041 V per 10 °C rise above 25 °C. This behavior is confirmed for devices rated IZT ≥ 8.5 mA (per Note 3), and must be factored into precision reference designs operating across wide temperature spans. For tighter drift control, higher-voltage Zeners in this series exhibit more stable coefficients.
1N5260A 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):
- 43 V
- Tolerance:
- ±10%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 93 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 33 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)
1N5260A FAQ
1.How can I place an order for 1N5260A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5260A 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 1N5260A reliable?
The price and inventory of 1N5260A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5260A is usually 5 days.
3.What payment methods are accepted for 1N5260A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5260A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5260A?
1N5260A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5260A 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 1N5260A?
For technical support, including 1N5260A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5260A requirements.
6.How does Aetrix verify that 1N5260A is sourced from the original manufacturer or authorized distributors?
All 1N5260A 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 1N5260A meets industry standards.
7.What is the process for return or replacement of 1N5260A?
All 1N5260A units undergo pre-shipment inspection (PSI). If there is an issue with 1N5260A, 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 1N5260A part is unused and in its original packaging.
Return procedure for 1N5260A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5260A Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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