My Inquiry
My Account
Microchip Technology 1N5245A
- Part No.:
- 1N5245A
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5245A.pdf
- Description:
- DIODE ZENER 15V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:4,392
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5245A from Microsemi is a 15 V, ±10% 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 IZT, used for precision voltage regulation in low-power analog reference and bias circuits.
For engineers reviewing the 1N5245A datasheet, 1N5245A pinout, 1N5245A application, or 1N5245A equivalent, this page delivers verified electrical specs, thermal derating behavior, Zener voltage temperature coefficient (+0.082 %/°C), cathode band polarity marking, and RoHS-compliant e3 variant availability.
Technical Context
The 1N5245A operates as a two-terminal voltage reference device with sharp reverse breakdown knee, defined by JEDEC-standardized Zener voltage (VZ = 15 V @ IZT = 20 mA) and low dynamic impedance (ZZT = 8.5 Ω). Its regulation stability relies on controlled junction doping and hermetically sealed glass construction.
It exhibits a positive temperature coefficient of +0.082 %/°C over 25–125 °C, requiring thermal compensation in high-accuracy references. The device supports steady-state dissipation of 0.5 W at TL ≤ 50 °C (3/8″ lead length) and derates linearly to zero at 175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 15 V @ 20 mA test current - defines stable regulation point for low-current reference designs |
| Power Dissipation | 0.5 W at 25 °C ambient - sets maximum continuous DC power handling before thermal derating applies |
| Zener Impedance | 8.5 Ω @ IZT - determines output voltage variation under load current changes |
| Reverse Leakage Current | 10 μA @ 12 V - ensures minimal quiescent current in standby regulation circuits |
| Temperature Coefficient | +0.082 %/°C - quantifies voltage drift per degree rise; requires compensation above 50 °C operation |
| Operating Temperature | −65 °C to +175 °C - enables use in extended industrial, aerospace, and downhole environments |
| Forward Voltage | 1.5 V max @ 200 mA - defines conduction threshold when used in bidirectional protection or clamp roles |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode indicated by a 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; forward conduction path when biased >1.5 V |
| Cathode | Banded end | Connected to higher-potential node during Zener regulation; defines reference output terminal |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N52xx series compliance | Ensures interchangeability and standardized test conditions across global supply chain |
| ±10% voltage tolerance (A suffix) | Meets cost-sensitive industrial reference requirements without premium tight-tolerance pricing |
| Low 8.5 Ω dynamic impedance at 20 mA | Minimizes output voltage sag under varying load currents in feedback or bias networks |
| Radiation-hardened per MicroNote 050 | Supports deployment in space-grade and nuclear instrumentation applications without upscreening |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for handling precautions during manual assembly or prototyping |
Applications
| Reference Voltage Source | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 15 V reference for op-amp comparators and ADC voltage dividers in sensor signal conditioning modules. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference establishing precise DC bias point independent of supply variation. Use Value: Enables <±1% measurement accuracy over −40 to +85 °C ambient with no active regulation circuitry. | Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 15 V in industrial control panels. IC Role / Device Role / Timing Role: Shunt clamping element diverting excess energy to ground when input exceeds 15 V Zener threshold. Use Value: Limits peak voltage to 15.5 V (including ZZT × Isurge) while dissipating <0.5 W during short-duration transients. |
| Current Source Bias | Power Supply Regulation |
Use Scenario: Setting collector current in discrete BJT amplifier stages via constant-voltage drop across emitter resistor. IC Role / Device Role / Timing Role: Fixed-voltage node enabling predictable IC = (VZ − VBE) / RE calculation. Use Value: Achieves <±5% current stability over temperature due to matched TC between VZ and VBE. | Use Scenario: Regulating unregulated 18–24 V DC rails to clean 15 V for analog subsystems in legacy telecom equipment. IC Role / Device Role / Timing Role: Series-pass shunt regulator element maintaining output within ±0.15 V under 1–15 mA load range. Use Value: Delivers 15 V ±0.5% with <10 mV ripple suppression using only one resistor and the 1N5245A. |
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 power rating, DO-41 package, ZZT = 14 Ω @ 17 mA | Higher power handling but larger footprint; less suitable for space-constrained PCBs | Select when >500 mW dissipation or tighter ±5% tolerance is required |
| BZX55-C15 (Vishay) | 15 V, ±5%, 500 mW, DO-35, ZZT = 15 Ω @ 5 mA, αVZ = +0.08 %/°C | Lower test current and higher impedance reduce regulation precision at higher loads | Select when sourcing from distributors with strong Vishay inventory; verify thermal layout compatibility |
Compared with 1N4744A and BZX55-C15, the 1N5245A offers tighter thermal resistance (250 °C/W vs. ~300 °C/W), lower ZZT, and radiation hardness-making it preferred for high-reliability, thermally constrained, or mission-critical analog references.
Availability
1N5245A is available at Aetrix Electronics and suitable for precision voltage reference, overvoltage protection, analog biasing, and low-power regulation applications requiring stable component supply across industrial, aerospace, and test equipment programs.
Supply support for 1N5245A 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 robust, low-cost, and field-proven voltage regulation in harsh-environment electronics where long-term stability and JEDEC standardization are mandatory.
FAQ
What is the Zener voltage tolerance for the 1N5245A?
The 1N5245A has a nominal Zener voltage of 15 V with a guaranteed tolerance of ±10%, as indicated by the "A" suffix per JEDEC standard. This tolerance is verified at 20 mA test current and 25 °C ambient, and remains valid across the full operating temperature range of −65 °C to +175 °C.
Does the 1N5245A require heatsinking in typical applications?
No, the 1N5245A does not require external heatsinking in standard applications. Its 0.5 W power rating is fully usable at lead temperature ≤50 °C (3/8″ from body), and thermal resistance is 250 °C/W junction-to-lead. For PCB-mounted use, derating begins above 25 °C ambient per Figure 1 in the datasheet.
How is polarity marked on the 1N5245A?
The 1N5245A uses a single black band on the glass body to identify the cathode terminal. During Zener regulation, the banded end must be held at a higher potential than the anode (non-banded) end. This marking is consistent across all DO-35 Zener diodes in the 1N52xx family.
Is the 1N5245A RoHS compliant?
Yes, RoHS-compliant versions of the 1N5245A are available with the "e3" suffix (e.g., 1N5245Ae3), featuring annealed matte-tin plating per MIL-STD-750 Method 2026. Standard versions use tin-lead plating, and both meet solderability requirements at 260 °C for 10 seconds.
What is the maximum reverse leakage current for the 1N5245A?
The 1N5245A specifies a maximum reverse leakage current (IR) of 10 μA at 12 V reverse bias (80% of VZ). This value is measured after 20 seconds of thermal stabilization and confirms low standby power draw in always-on reference circuits.
1N5245A 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:
- ±10%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 16 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 11 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)
1N5245A FAQ
1.How can I place an order for 1N5245A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5245A 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 1N5245A reliable?
The price and inventory of 1N5245A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5245A is usually 5 days.
3.What payment methods are accepted for 1N5245A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5245A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5245A?
1N5245A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5245A 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 1N5245A?
For technical support, including 1N5245A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5245A requirements.
6.How does Aetrix verify that 1N5245A is sourced from the original manufacturer or authorized distributors?
All 1N5245A 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 1N5245A meets industry standards.
7.What is the process for return or replacement of 1N5245A?
All 1N5245A units undergo pre-shipment inspection (PSI). If there is an issue with 1N5245A, 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 1N5245A part is unused and in its original packaging.
Return procedure for 1N5245A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5245A 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
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
