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Microchip Technology 1N5245
- Part No.:
- 1N5245
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5245.pdf
- Description:
- DIODE ZENER 15V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:3,215
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Product details
Overview
1N5245 from Microsemi is a 15 V, ±5% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 20 mA test current and 8.5 Ω dynamic impedance at IZK = 0.25 mA, used for precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the 1N5245 datasheet, 1N5245 pinout, 1N5245 application, or 1N5245 equivalent, key selection criteria include Zener voltage stability across temperature (αVZ = +0.082 %/°C), low reverse leakage (≤10 μA @ VR = 12 V), and robust thermal performance (250 °C/W junction-to-lead) in compact axial-leaded form factor.
Technical Context
The 1N5245 operates as a two-terminal voltage reference device with sharp reverse breakdown knee, specified under JEDEC-standard conditions using 20 mA DC test current and stabilized thermal measurement at 25 °C ambient. Its Zener mechanism delivers stable regulation across -65 °C to +175 °C operating range.
It exhibits minimal capacitance (typical <2 pF at 0 V), low forward voltage (≤1.5 V @ 200 mA), and inherent radiation hardness per MicroNote 050 - making it suitable for space-constrained, high-reliability analog signal conditioning and power rail clamping where ESD insensitivity (MIL-STD-750 Method 1020) is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 15 V @ IZT = 20 mA - defines regulated output voltage under standard test condition |
| Zener Tolerance | ±5% (B suffix) - ensures voltage accuracy within 14.25–15.75 V at 25 °C |
| Power Dissipation | 500 mW at 25 °C - sets maximum continuous power handling before thermal derating applies |
| Zener Impedance | 16 Ω @ IZK = 0.25 mA - indicates regulation stiffness near knee region for low-current stability |
| Temperature Coefficient | +0.082 %/°C - quantifies voltage drift magnitude per degree rise above 25 °C |
| Reverse Leakage | ≤10 μA @ VR = 12 V - defines maximum off-state current below breakdown, critical for standby power loss |
| Operating Temperature | -65 °C to +175 °C - enables use in extended industrial, aerospace, and automotive environments |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode indicated by color 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 | Reference ground node | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener regulation terminal | Banded end; must be held positive relative to anode to achieve 15 V breakdown and regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N52xx series definition for interchangeability and test methodology |
| Radiation-hardened construction | Inherently radiation tolerant per MicroNote 050 - validated for total ionizing dose resilience in space-grade applications |
| ESD-insensitive design | Passes MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling and assembly |
| Low-capacitance regulation | Typical <2 pF at 0 V - preserves high-frequency signal integrity in RF biasing and fast-switching clamp circuits |
| Wide thermal operating range | -65 °C to +175 °C - supports deployment in engine control units, downhole tools, and avionics without derating penalties |
Applications
| Industrial Sensor Reference | Overvoltage Clamp for MCU I/O |
|---|---|
Use Scenario: Providing stable 15 V reference for 12-bit ADC front-end in temperature-transmitter modules operating at 125 °C ambient. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference establishing precise bias point for op-amp gain stages. Use Value: Maintains ±0.12% voltage stability over full temperature range due to +0.082 %/°C TC and low thermal resistance (250 °C/W). |
Use Scenario: Protecting 3.3 V GPIO pins of ARM Cortex-M4 microcontrollers against 24 V field-wiring transients in factory automation PLCs. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage excursion to ≤15.75 V during surge events. Use Value: Absorbs up to 500 mW transient energy without degradation, leveraging 10 μA max IR to minimize standby loading on protected rail. |
| Low-Power Analog Power Supply | Aerospace Voltage Monitor Threshold |
Use Scenario: Generating local 15 V bias for op-amps and comparators in battery-powered portable instrumentation with <100 μA quiescent draw. IC Role / Device Role / Timing Role: Primary regulation element in simple shunt regulator topology with series resistor. Use Value: Delivers stable 15 V output with only 0.25 mA minimum operating current (IZK), enabling ultra-low-power operation. |
Use Scenario: Setting trip threshold for radiation-tolerant voltage supervisor IC monitoring 28 V bus in satellite power distribution units. IC Role / Device Role / Timing Role: Precision Zener element defining comparator reference voltage in fault-detection circuitry. Use Value: Guarantees trip accuracy within ±5% over mission lifetime due to JEDEC registration and radiation-hardened glass package. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A (ON Semiconductor) | 15 V, ±5%, 1 W rating, DO-41 package, 22 Ω ZT @ 25 mA - higher power but larger footprint and higher ZT | Preferred where >500 mW surge absorption is needed; unsuitable for space-constrained DO-35 layouts | Select 1N4744A only if board layout allows DO-41 and thermal margin exceeds 1 W dissipation requirements. |
| BZX55C15 (Vishay) | 15 V, ±5%, 500 mW, DO-35 package, 16 Ω ZT @ 5 mA - identical package and power, but higher ZT at lower test current | Better suited for low-current biasing (<5 mA); less stable than 1N5245 at 20 mA nominal operation | Choose BZX55C15 when operating current is ≤5 mA and cost sensitivity outweighs regulation stiffness at full-rated current. |
Compared with 1N4744A and BZX55C15, the 1N5245 offers optimal balance of DO-35 footprint compatibility, 20 mA-rated regulation stiffness (16 Ω), and proven radiation tolerance - making it preferred for high-reliability, size-constrained analog references where JEDEC compliance and thermal stability are critical.
Availability
1N5245 is available at Aetrix Electronics and suitable for industrial sensor reference, overvoltage clamp for MCU I/O, and low-power analog power supply applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N5245 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-voltage analog components for aerospace, defense, and industrial markets.
The 1N52xx series was designed specifically for precision voltage regulation in harsh-environment applications where long-term stability, JEDEC compliance, and extended temperature operation are mandatory design requirements.
FAQ
What is the Zener voltage tolerance for the 1N5245?
The 1N5245 has a nominal Zener voltage of 15 V with ±5% tolerance, corresponding to the "B" suffix per JEDEC specification. This means its actual breakdown voltage falls between 14.25 V and 15.75 V when measured at 20 mA test current and 25 °C ambient temperature. The tolerance is guaranteed across the full operating temperature range of -65 °C to +175 °C.
What package type does the 1N5245 use?
The 1N5245 uses the DO-35 (also designated DO-204AH) hermetically sealed glass axial-leaded package. It features a cylindrical glass body with tinned copper alloy leads, cathode identified by a single black band, and complies with MIL-STD-750 solderability requirements. The package measures approximately 1.8 mm diameter × 3.6 mm length.
How does the 1N5245 perform at elevated temperatures?
The 1N5245 maintains regulation across -65 °C to +175 °C, with a positive temperature coefficient of +0.082 %/°C above 25 °C. At 125 °C, its Zener voltage increases by approximately 0.82 V (5.5%) relative to 25 °C value. Thermal resistance is 250 °C/W junction-to-lead at 10 mm lead length, enabling reliable operation in high-ambient environments without forced cooling.
Is the 1N5245 suitable for space or radiation-intensive applications?
Yes - the 1N5245 is inherently radiation-hardened per MicroNote 050 and qualified for use in space-grade systems. Its glass DO-35 construction provides immunity to total ionizing dose (TID) effects, and it meets MIL-PRF-19500 screening levels (e.g., JANTXV) when ordered with appropriate prefixes and suffixes. Radiation tolerance is a built-in feature, not an optional screen.
What is the maximum reverse leakage current for the 1N5245?
The 1N5245 has a maximum reverse leakage current (IR) of 10 μA when tested at VR = 12 V and 25 °C. This low leakage ensures minimal standby power loss in battery-operated circuits and preserves accuracy in high-impedance reference networks. Leakage remains ≤10 μA across the full -65 °C to +175 °C operating range per qualification data.
1N5245 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):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 16 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 10.5 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)
1N5245 FAQ
1.How can I place an order for 1N5245 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5245 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 1N5245 reliable?
The price and inventory of 1N5245 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5245 is usually 5 days.
3.What payment methods are accepted for 1N5245?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5245 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5245?
1N5245 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5245 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 1N5245?
For technical support, including 1N5245 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5245 requirements.
6.How does Aetrix verify that 1N5245 is sourced from the original manufacturer or authorized distributors?
All 1N5245 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 1N5245 meets industry standards.
7.What is the process for return or replacement of 1N5245?
All 1N5245 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5245, 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 1N5245 part is unused and in its original packaging.
Return procedure for 1N5245:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5245 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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