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Microchip Technology 1N5274A
- Part No.:
- 1N5274A
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5274A.pdf
- Description:
- DIODE ZENER 130V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:7,107
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Product details
Overview
1N5274A from Microsemi is a 500 mW, 130 V Zener diode in DO-35 glass axial-leaded package with ±10% voltage tolerance, 0.95 mA test current, and 4500 Ω dynamic impedance at 0.25 mA. It regulates voltage in low-power reference and protection circuits across industrial temperature range (–65°C to +175°C).
For engineers reviewing the 1N5274A datasheet, 1N5274A pinout, 1N5274A application, or 1N5274A equivalent, this page delivers verified electrical specs, thermal derating behavior, cathode-band polarity marking, and RoHS-compliant packaging options - all critical for precision voltage reference design and legacy system replacement.
Technical Context
The 1N5274A operates as a reverse-biased silicon Zener diode with sharp breakdown knee at 130 V nominal, characterized at IZT = 0.95 mA and validated per JEDEC 1N52xx standards. Its 4500 Ω Zener impedance at IZK = 0.25 mA confirms stable regulation under light-load conditions.
Thermal performance is defined by 250 °C/W junction-to-lead resistance at 10 mm lead length and 310 °C/W junction-to-ambient on FR4 board. Maximum reverse leakage is 10 μA at VR = 104 V, and forward voltage is ≤1.5 V at 200 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 130 V ±10% - sets precise clamping level for overvoltage protection and reference circuits |
| Power Dissipation | 500 mW at 25°C - defines maximum continuous power handling before thermal derating applies |
| Zener Test Current | 0.95 mA - operating point where VZ is guaranteed; used for calibration and biasing |
| Zener Impedance | 4500 Ω at IZK = 0.25 mA - indicates regulation stability under very low current conditions |
| Max Reverse Leakage | 10 μA at VR = 104 V - ensures minimal standby current in high-impedance sensing paths |
| Temp. Coefficient | +0.110 %/°C - quantifies voltage drift with temperature; critical for wide-range accuracy |
| Operating Temp. | –65°C to +175°C - supports aerospace, downhole, and military applications without derating |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode indicated by single black 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 during Zener operation; forward conduction path |
| Cathode | Banded end | Connected to higher-potential node; Zener breakdown occurs here in reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N52xx series specifications for interchangeability and testing |
| RoHS-compliant option | Available with "e3" suffix - meets environmental compliance without performance trade-off |
| Radiation-hardened | Inherently radiation tolerant per MicroNote 050 - suitable for space and nuclear environments |
| ESD-insensitive | No special handling required per MIL-STD-750 Method 1020 - simplifies manufacturing and field service |
| Low capacitance | Typical <2 pF - preserves signal integrity in high-frequency clamp and sample-hold circuits |
Applications
| Voltage Reference Source | Overvoltage Protection |
|---|---|
Use Scenario: Stable 130 V reference for analog-to-digital converter (ADC) input scaling in industrial data acquisition systems. IC Role / Device Role / Timing Role: Zener diode provides fixed reference voltage to ADC reference input, replacing precision voltage references where ±10% tolerance is acceptable. Use Value: Eliminates need for active reference ICs while maintaining adequate linearity over –40°C to +85°C ambient range. | Use Scenario: Clamp circuit protecting microcontroller I/O pins from transient surges in 120 V AC line-sensing interfaces. IC Role / Device Role / Timing Role: Acts as shunt regulator that conducts excess energy when input exceeds 130 V, diverting current away from sensitive logic. Use Value: Limits peak voltage to 130 V ±10% with <10 μA leakage below threshold - preserving signal fidelity during normal operation. |
| Power Supply Regulation | Temperature-Stable Biasing |
Use Scenario: Low-current bias supply for high-voltage op-amp stages in medical imaging front-end amplifiers. IC Role / Device Role / Timing Role: Provides regulated 130 V rail for op-amp high-side supply, stabilized by thermal resistance of 250 °C/W junction-to-lead. Use Value: Maintains regulation within ±0.110 %/°C drift across full –65°C to +175°C range - enabling reliable operation in sterilizable equipment. | Use Scenario: Bias network for RF power transistor base-emitter junction in HF transmitter final stages. IC Role / Device Role / Timing Role: Supplies temperature-compensated bias voltage using matched 1N5274A units in differential configuration. Use Value: Leverages consistent +0.110 %/°C coefficient across production lots to minimize thermal drift in gain-setting networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5274B | ±5% tolerance (vs. ±10% for 1N5274A); same VZ, IZT, and package | Higher precision required in reference circuits where tighter voltage control is needed | Select 1N5274B when ±5% regulation accuracy is mandatory and cost premium is acceptable |
| MMBZ5274B | SOT-23 surface-mount package; 200 mW power rating; same 130 V nominal and ±5% tolerance | Used in space-constrained PCB layouts where axial-leaded DO-35 cannot be accommodated | Choose MMBZ5274B only if board real estate is limited and 200 mW dissipation suffices |
Compared with 1N5274A, the 1N5274B offers tighter voltage tolerance without changing thermal or electrical interface, while the MMBZ5274B trades power rating and mounting style for miniaturization - neither is pin-compatible due to differing packages and lead forms.
Availability
1N5274A is available at Aetrix Electronics and suitable for industrial instrumentation, aerospace power monitoring, and legacy military electronics requiring stable component supply with long lifecycle support.
Supply support for 1N5274A 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, mixed-signal, and radiation-hardened components for defense, aerospace, and industrial markets.
The 1N52xx series was designed for robust, low-cost voltage regulation in harsh-environment applications where extended temperature range, ESD immunity, and hermetic sealing are essential.
FAQ
What is the nominal Zener voltage and tolerance of the 1N5274A?
The 1N5274A has a nominal Zener voltage of 130 V with a tolerance of ±10%, as designated by the "A" suffix per Microsemi's 1N52xx family specification. This tolerance is guaranteed under standard test conditions (IZT = 0.95 mA, TA = 25°C), and the device complies with JEDEC registration requirements for the 1N52xx series.
What package type and marking does the 1N5274A use?
The 1N5274A uses the DO-35 (DO-204AH) hermetically sealed glass axial-leaded package. The cathode is marked by a single black band on the glass body, and the part number "1N5274A" is laser-marked or etched directly onto the device. Lead finish is either tin-lead or RoHS-compliant matte-tin per MIL-STD-750 Method 2026.
What is the maximum power dissipation and thermal resistance of the 1N5274A?
The 1N5274A has a maximum power dissipation of 500 mW at 25°C ambient, with thermal resistance of 250 °C/W junction-to-lead at 10 mm lead length. When mounted on an FR4 PCB with specified copper area, junction-to-ambient thermal resistance is 310 °C/W, and steady-state power drops to 0.48 W at TA < 25°C.
How does the 1N5274A perform under high-temperature conditions?
The 1N5274A operates reliably from –65°C to +175°C, with a positive temperature coefficient of +0.110 %/°C. Its regulation remains stable across this range due to inherent radiation hardness and ESD insensitivity, making it suitable for downhole tools, avionics, and engine-control modules where thermal cycling is extreme.
Is the 1N5274A RoHS compliant, and how is compliance indicated?
Yes, RoHS-compliant versions of the 1N5274A are available with the "e3" suffix (e.g., 1N5274Ae3), indicating annealed matte-tin plating per JEDEC J-STD-609. Standard 1N5274A units may use tin-lead plating; users must specify the "e3" suffix at order time to ensure RoHS conformance.
1N5274A 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):
- 130 V
- Tolerance:
- ±10%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1100 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 99 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)
1N5274A FAQ
1.How can I place an order for 1N5274A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5274A 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 1N5274A reliable?
The price and inventory of 1N5274A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5274A is usually 5 days.
3.What payment methods are accepted for 1N5274A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5274A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5274A?
1N5274A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5274A 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 1N5274A?
For technical support, including 1N5274A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5274A requirements.
6.How does Aetrix verify that 1N5274A is sourced from the original manufacturer or authorized distributors?
All 1N5274A 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 1N5274A meets industry standards.
7.What is the process for return or replacement of 1N5274A?
All 1N5274A units undergo pre-shipment inspection (PSI). If there is an issue with 1N5274A, 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 1N5274A part is unused and in its original packaging.
Return procedure for 1N5274A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5274A Tags
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