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Microchip Technology 1N5231A/TR
- Part No.:
- 1N5231A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5231A/TR.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:5,626
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Product details
Overview
1N5231A/TR from Microsemi is a 500 mW, 5.1 V ±10% glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 20 mA test current, 17 Ω dynamic impedance at IZT, and -65°C to +175°C operating temperature range. It provides stable voltage regulation in low-power reference and protection circuits.
For engineers reviewing the 1N5231A/TR datasheet, 1N5231A/TR pinout, 1N5231A/TR application, or 1N5231A/TR equivalent, key selection criteria include Zener voltage tolerance (±10%), thermal resistance (250 °C/W junction-to-lead), reverse leakage (50 µA @ 3.8 V), and RoHS-compliant plating options with "e3" suffix.
Technical Context
This discrete Zener diode operates in reverse breakdown mode with cathode band marking polarity. Its regulation performance is specified at 20 mA test current and validated across -65°C to +175°C ambient, with temperature coefficient of ±0.030 %/°C for the A-suffix variant.
Designed for axial-leaded through-hole mounting, it features hermetically sealed glass construction, 0.2 g mass, and tin-lead or annealed matte-tin plating compliant with MIL-STD-750 Method 2026. Soldering max is 260°C for 10 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 5.1 V ±10% at 20 mA - defines nominal regulation point with guaranteed min/max bounds for precision biasing |
| Power Dissipation | 500 mW at 25°C - sets maximum continuous DC power handling before thermal derating applies |
| Zener Impedance ZZT | 17 Ω at IZT = 20 mA - indicates small-signal AC resistance affecting regulation stability under varying load |
| Reverse Leakage IR | 50 µA @ 3.8 V - quantifies off-state conduction that impacts high-impedance reference accuracy |
| Temp Coefficient αVZ | ±0.030 %/°C - determines voltage drift magnitude over temperature in compensated reference designs |
| Forward Voltage VF | ≤1.5 V @ 200 mA - defines forward conduction threshold, relevant for polarity-sensitive protection schemes |
| Operating Temp Range | -65°C to +175°C - enables use in aerospace, downhole, and industrial environments without derating |
Pinout & Package
DO-35 (DO-204AH) glass axial-lead package with cathode indicated by a single black band; leads are flexible axial terminals suitable for manual or wave soldering. Hermetically sealed construction ensures long-term reliability in harsh environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded lead | Connected to lower-potential node; must be negative relative to cathode for Zener operation |
| Cathode | Banded lead | Connected to higher-potential node; voltage regulation occurs across this terminal pair in reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered device | Complies with industry-standard 1N52xx series mechanical and electrical definitions for interchangeability |
| RoHS-compliant option | Available with "e3" suffix - meets environmental compliance without sacrificing glass-body reliability |
| Tight thermal resistance | 250 °C/W junction-to-lead (3/8″ lead length) - supports stable operation without heatsinking in compact layouts |
| ESD robustness | Nonsensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in board-level integration |
| Low capacitance | Typical <2 pF - preserves high-frequency signal integrity in RF bias and fast-switching clamp applications |
Applications
| Voltage Reference for Analog Sensors | Overvoltage Clamp in MCU I/O Protection |
|---|---|
Use Scenario: Provides stable 5.1 V reference for ADC biasing and sensor excitation in industrial temperature transmitters. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown as two-terminal shunt voltage reference. Use Value: ±10% tolerance and ±0.030 %/°C tempco enable sub-1% total error over -40°C to +85°C without trimming. | Use Scenario: Clamps 5 V I/O lines on microcontrollers against ESD and transient surges exceeding 6 V. IC Role / Device Role / Timing Role: Shunt protection device diverting excess current away from sensitive input pins. Use Value: 50 µA leakage at 3.8 V ensures minimal loading on 5 V logic, while 500 mW rating absorbs 8 kV HBM ESD events. |
| Low-Power Bias Supply for Op-Amps | Regulated Standby Voltage in Power Sequencing |
Use Scenario: Generates clean 5.1 V bias for rail-to-rail op-amps in battery-powered instrumentation. IC Role / Device Role / Timing Role: Passive voltage regulator supplying fixed bias independent of load current variation. Use Value: 17 Ω ZZT maintains <10 mV output shift from 5 to 20 mA load, enabling stable gain calibration. | Use Scenario: Maintains 5.1 V standby rail during main supply sequencing in FPGA-based control systems. IC Role / Device Role / Timing Role: Hold-up regulator ensuring critical configuration logic remains powered during power transitions. Use Value: -65°C to +175°C rating allows operation in unheated enclosures and high-temp industrial cabinets without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4729A | 5.6 V nominal, ±5% tolerance, 1.0 W power rating, DO-41 package | Higher power and tighter tolerance but 0.5 V higher Zener voltage; requires PCB footprint change | Select when higher power margin or tighter voltage accuracy is required and DO-41 layout is available |
| BZX55C5V1 | 5.1 V ±5%, 500 mW, DO-35, lower ZZT (10 Ω), different tempco (+0.05%/°C) | Improved regulation stiffness but less stable over temperature than 1N5231A/TR in wide-range environments | Prefer for room-temperature-stable references where dynamic impedance dominates error budget |
Compared with 1N4729A and BZX55C5V1, the 1N5231A/TR offers the only combination of JEDEC 1N52xx-series compatibility, ±10% tolerance with known tempco (±0.030 %/°C), and proven high-temperature operation up to +175°C - critical for aerospace and downhole electronics.
Availability
1N5231A/TR is available at Aetrix Electronics and suitable for voltage reference design, I/O protection circuits, and low-power bias supply applications requiring stable component supply across extended temperature ranges.
Supply support for 1N5231A/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 specifically for ruggedized, low-power voltage regulation in mission-critical systems where long-term stability, wide temperature operation, and JEDEC-standard interchangeability are mandatory.
FAQ
What is the Zener voltage tolerance for 1N5231A/TR?
The "A" suffix in 1N5231A/TR specifies a nominal Zener voltage of 5.1 V with a tolerance of ±10%, as defined in the Microsemi datasheet. This tolerance applies under standard test conditions (25°C, IZT = 20 mA) and is guaranteed across the full operating temperature range.
Does 1N5231A/TR have RoHS-compliant packaging options?
Yes - the "e3" suffix denotes RoHS-compliant annealed matte-tin plating per MIL-STD-750 Method 2026. The base 1N5231A/TR part uses standard tin-lead plating; RoHS compliance requires ordering 1N5231Ae3/TR or confirming e3 marking on the device body.
What is the maximum reverse leakage current for 1N5231A/TR?
The maximum reverse leakage current for 1N5231A/TR is 50 µA measured at 3.8 V (0.75 × VZ). This value is specified in the Electrical Characteristics table and reflects worst-case off-state conduction affecting high-impedance reference nodes.
Can 1N5231A/TR be used in surface-mount designs?
No - 1N5231A/TR is a DO-35 axial-leaded glass package intended for through-hole mounting. For surface-mount equivalents, Microsemi offers the MLL5231B in DO-213AA (MELF) package; it shares identical electrical specs but requires requalification for thermal and mechanical layout.
What is the thermal resistance of 1N5231A/TR, and how does it affect layout?
The junction-to-lead thermal resistance of 1N5231A/TR is 250 °C/W at 3/8″ (10 mm) lead length from the glass body. This means a 125 mW dissipation raises junction temperature by 31.25°C above lead temperature - guiding minimum lead length and copper pour requirements for thermal management.
1N5231A/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):
- 5.1 V
- Tolerance:
- ±10%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1.9 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)
1N5231A/TR FAQ
1.How can I place an order for 1N5231A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5231A/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 1N5231A/TR reliable?
The price and inventory of 1N5231A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5231A/TR is usually 5 days.
3.What payment methods are accepted for 1N5231A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5231A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5231A/TR?
1N5231A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5231A/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 1N5231A/TR?
For technical support, including 1N5231A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5231A/TR requirements.
6.How does Aetrix verify that 1N5231A/TR is sourced from the original manufacturer or authorized distributors?
All 1N5231A/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 1N5231A/TR meets industry standards.
7.What is the process for return or replacement of 1N5231A/TR?
All 1N5231A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5231A/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 1N5231A/TR part is unused and in its original packaging.
Return procedure for 1N5231A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5231A/TR 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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