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Microchip Technology 1N5244A/TR
- Part No.:
- 1N5244A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5244A/TR.pdf
- Description:
- DIODE ZENER 14V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,106
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Product details
Overview
1N5244A/TR from Microsemi is a 14 V, ±10% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 9.0 mA test current and 15 Ω dynamic impedance at IZK = 0.25 mA, used for precision voltage regulation in low-power analog reference and power supply feedback circuits.
For engineers reviewing the 1N5244A/TR datasheet, 1N5244A/TR pinout, 1N5244A/TR application, or 1N5244A/TR equivalent, key selection criteria include Zener voltage tolerance (±10%), thermal resistance (310 °C/W on FR4), reverse leakage (<5 μA at 11.2 V), temperature coefficient (+0.082 %/°C), and RoHS-compliant "e3" variant availability.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable DC voltage across its terminals under varying load and line conditions. It exhibits a sharp knee at 9.0 mA test current with 15 Ω dynamic impedance at 0.25 mA, enabling predictable regulation in low-current bias networks.
Designed for operation from –65 °C to +175 °C, it features hermetically sealed glass construction, nonsensitive ESD behavior per MIL-STD-750 Method 1020, and inherent radiation hardness per MicroNote 050-making it suitable for aerospace and industrial environments where reliability under stress is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 14 V @ 9.0 mA - defines regulated output voltage in shunt regulator configurations |
| Zener Tolerance | ±10% (A suffix) - sets worst-case voltage window of 12.6–15.4 V at 25 °C |
| Power Dissipation | 500 mW at 25 °C - limits maximum continuous shunt current to ~35.7 mA at 14 V |
| Zener Impedance | 15 Ω @ IZK = 0.25 mA - determines regulation stiffness under light-load transients |
| Temp. Coefficient | +0.082 %/°C - predicts +11.5 mV/°C drift above 25 °C, critical for temp-stable references |
| Reverse Leakage | <5 μA @ 11.2 V - ensures minimal quiescent current loss in high-impedance bias networks |
| Package | DO-35 (DO-204AH) glass axial-leaded - enables through-hole mounting with 0.2 g mass and 10 mm lead length |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode indicated by colored 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 voltage ≤1.5 V @ 200 mA |
| Cathode | Banded end | Connected to higher-potential node; regulates voltage when reverse-biased above 14 V |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with JEDEC 1N52xx standard for interchangeability and test methodology |
| Stable voltage regulation | Maintains 14 V ±10% over 1–20 mA operating current and –65 °C to +175 °C range |
| Low capacitance | Typical junction capacitance <2 pF - preserves high-frequency signal integrity in RF bias networks |
| Radiation-hardened | Inherently radiation tolerant per MicroNote 050 - qualified for space-grade applications without derating |
| ESD robustness | Nonsensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling |
Applications
| Low-Power Reference Supply | Overvoltage Clamp |
|---|---|
Use Scenario: Generating stable 14 V reference for op-amp biasing or ADC reference in battery-powered instrumentation. IC Role / Device Role / Timing Role: Shunt voltage regulator providing fixed DC potential independent of input variation. Use Value: Delivers 14 V ±10% with <5 μA leakage at 11.2 V, minimizing standby current drain while maintaining accuracy over temperature. | Use Scenario: Protecting microcontroller I/O pins from transient voltage spikes exceeding 14 V. IC Role / Device Role / Timing Role: Voltage clamp diverting excess energy to ground when input exceeds Zener breakdown. Use Value: Responds within nanoseconds with 15 Ω dynamic impedance, limiting clamped voltage to ≤14.5 V at 10 mA surge. |
| Current-Sense Feedback | Temperature-Compensated Bias |
Use Scenario: Setting precise current limit threshold in linear regulator feedback loop. IC Role / Device Role / Timing Role: Zener-defined voltage drop across sense resistor establishes trip point. Use Value: Enables 1% current threshold accuracy via 14 V reference with +0.082 %/°C TC, allowing predictable thermal drift compensation. | Use Scenario: Compensating transistor VBE drift in analog front-end amplifiers. IC Role / Device Role / Timing Role: Zener diode paired with forward-biased diode to cancel thermal drift. Use Value: Leverages known +0.082 %/°C coefficient to offset –2.1 mV/°C VBE drift, achieving <±0.5 mV/°C net drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V nominal, ±5% tolerance, 1 W power rating, DO-41 package | Higher power and tighter tolerance but different voltage and larger footprint | Select when 12 V regulation and >500 mW dissipation are required; not pin-compatible due to DO-41 vs. DO-35 |
| BZX55C14 | 14 V nominal, ±5% tolerance, 500 mW, DO-35 package, lower ZZT (15 Ω vs. 15 Ω at IZK) | Same voltage and package, but tighter tolerance and different temp coefficient (+0.075 %/°C) | Prefer for higher-precision 14 V references where ±5% tolerance and lower TC are critical |
Compared with 1N5244A/TR, 1N4742A offers higher power and tighter tolerance but requires PCB layout change due to DO-41 package, while BZX55C14 matches DO-35 form factor and voltage but improves tolerance to ±5% and reduces temperature coefficient-making it suitable for enhanced stability without mechanical redesign.
Availability
1N5244A/TR is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage protection, and analog bias circuitry requiring stable component supply across aerospace, industrial control, and test equipment programs.
Supply support for 1N5244A/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, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N52xx series was designed specifically for ruggedized, low-power voltage regulation in mission-critical systems where long-term stability, wide temperature operation, and intrinsic radiation tolerance are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5244A/TR?
The 1N5244A/TR has a nominal Zener voltage of 14 V with a ±10% tolerance, meaning its actual breakdown voltage falls between 12.6 V and 15.4 V at 25 °C and 9.0 mA test current. This tolerance is defined by the "A" suffix per JEDEC specification and applies across the full operating temperature range unless otherwise derated.
Is the 1N5244A/TR RoHS compliant?
Yes, the 1N5244A/TR is RoHS compliant when ordered with the "e3" suffix (e.g., 1N5244Ae3/TR). The base part number does not imply RoHS compliance; the "e3" designation confirms annealed matte-tin plating per RoHS requirements and solderability per MIL-STD-750 Method 2026.
What is the maximum reverse leakage current for the 1N5244A/TR?
The maximum reverse leakage current for the 1N5244A/TR is 5 μA at VR = 11.2 V (80% of nominal Zener voltage), measured at 25 °C. This value ensures minimal parasitic current draw in high-impedance reference or bias networks where leakage could degrade accuracy or efficiency.
Can the 1N5244A/TR be used in surface-mount designs?
No, the 1N5244A/TR is a through-hole DO-35 axial-leaded device and is not suitable for direct surface-mount assembly. Microsemi offers surface-mount equivalents under the MLL52xxB series (e.g., MLL5244B) in DO-213AA (MELF) package, which share identical electrical specs but require reflow-compatible layout and soldering profiles.
What is the thermal resistance of the 1N5244A/TR on a standard FR4 PCB?
The thermal resistance of the 1N5244A/TR is 310 °C/W junction-to-ambient when mounted on FR4 with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm traces. This value governs safe power derating: at 70 °C ambient, max dissipation drops to ~320 mW to keep junction temperature below 175 °C.
1N5244A/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):
- 14 V
- Tolerance:
- ±10%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 9.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5244A/TR FAQ
1.How can I place an order for 1N5244A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5244A/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 1N5244A/TR reliable?
The price and inventory of 1N5244A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5244A/TR is usually 5 days.
3.What payment methods are accepted for 1N5244A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5244A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5244A/TR?
1N5244A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5244A/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 1N5244A/TR?
For technical support, including 1N5244A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5244A/TR requirements.
6.How does Aetrix verify that 1N5244A/TR is sourced from the original manufacturer or authorized distributors?
All 1N5244A/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 1N5244A/TR meets industry standards.
7.What is the process for return or replacement of 1N5244A/TR?
All 1N5244A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5244A/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 1N5244A/TR part is unused and in its original packaging.
Return procedure for 1N5244A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5244A/TR Tags
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MM5Z5V1ST1G
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