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Microchip Technology 1N5345AE3/TR13
- Part No.:
- 1N5345AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5345AE3/TR13.pdf
- Description:
- DIODE ZENER 8.7V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:7,286
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Product details
Overview
1N5345AE3/TR13 from Microsemi is a 5.0 W axial-leaded silicon Zener diode with nominal regulation voltage of 8.7 V, ±10% tolerance (A suffix), 150 mA maximum Zener current (IZM), and 2.0 Ω maximum dynamic impedance (ZZ) at 150 mA test current. It operates from –65°C to +150°C and is RoHS-compliant (e3 suffix), used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5345AE3/TR13 datasheet, 1N5345AE3/TR13 pinout, 1N5345AE3/TR13 application, or 1N5345AE3/TR13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (9.5 A), and compliance with MIL-PRF-19500 screening options when prefixed.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output voltage across wide operating current (150 mA max IZM) and temperature (–65°C to +150°C) ranges. Its low 25 °C/W junction-to-lead thermal resistance enables high-power operation with minimal heatsinking when leads are trimmed to 3/8 inch (10 mm) from body.
The 1N5345AE3/TR13 exhibits 0.20 V maximum voltage regulation (ΔVZ) between 10% and 50% of IZM, confirming tight regulation stability. Its 2.0 Ω dynamic impedance at 150 mA test current (IZT = 150 mA) and 500 Ω maximum knee impedance (ZZK @ 1.0 mA) support reliable low-current biasing and transient suppression roles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.7 V ±10% - defines regulated output voltage under specified test conditions (IZT = 150 mA) |
| Power Dissipation | 5.0 W at TL = 25°C - maximum steady-state power handling with 3/8″ lead length heat sinking |
| Max Zener Current (IZM) | 150 mA - maximum DC current before exceeding rated power at rated voltage tolerance limit |
| Dynamic Impedance (ZZ) | 2.0 Ω max @ IZT = 150 mA - low AC impedance ensures minimal voltage variation under load transients |
| Surge Current (IZSM) | 9.5 A peak (8.3 ms half-sine) - supports short-duration overvoltage clamping without failure |
| Thermal Resistance | 25 °C/W junction-to-lead - enables high-current operation with simple lead-based thermal management |
| Reverse Leakage (IR) | 10 μA max @ VR = 6.25 V - low leakage preserves regulation accuracy and minimizes standby loss |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-204AL standard; void-free UL94V-0 epoxy body; cathode indicated by band; leads plated with RoHS-compliant matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to circuit ground or lower potential node in reverse-bias regulation configuration |
| Cathode | Zener regulation terminal | Banded end; connected to unregulated input rail to clamp voltage at 8.7 V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions, marking, and electrical behavior across global supply chain |
| Moisture sensitivity Level 1 | No dry pack required - simplifies handling, storage, and assembly logistics |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD controls during board assembly and handling |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU - suitable for environmentally regulated industrial and commercial designs |
| High surge current capability | 9.5 A non-recurrent half-sine (8.3 ms) withstand - protects downstream circuitry from transient overvoltages |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates error amplifier reference in isolated flyback or forward converter feedback networks. IC Role / Device Role / Timing Role: Zener diode provides stable 8.7 V reference to optocoupler input or TL431 cathode. Use Value: Maintains ±10% output regulation despite line/load variations and ambient temperature shifts from –40°C to +85°C. | Use Scenario: Supplies precise bias voltage to analog sensor signal conditioning circuits in factory automation systems. IC Role / Device Role / Timing Role: Acts as shunt reference for op-amp excitation or ADC reference divider network. Use Value: Delivers 8.7 V with ≤0.20 V regulation delta (ΔVZ) across 15–150 mA operating range, ensuring consistent sensor scaling. |
| Overvoltage Clamp Protection | Programmable Threshold Detector |
Use Scenario: Clamps transient surges on 12 V rail in automotive body control modules during load dump events. IC Role / Device Role / Timing Role: Shunt limiter placed between rail and ground to divert excess energy above 8.7 V. Use Value: Withstands 9.5 A surge (8.3 ms) without degradation, protecting downstream CAN transceivers and microcontrollers. | Use Scenario: Sets trip point for comparator-based undervoltage lockout (UVLO) in battery-powered medical devices. IC Role / Device Role / Timing Role: Provides fixed 8.7 V threshold against which battery voltage is compared. Use Value: Enables accurate UVLO activation at 8.7 V ±0.87 V, preventing brownout operation while maximizing usable battery capacity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5345B | ±5% tolerance (vs. ±10% for 1N5345AE3/TR13); same VZ, IZT, ZZ, and package | Higher precision required where tighter voltage stability is critical (e.g., calibration references) | Select 1N5345B when ±5% regulation accuracy is mandatory; otherwise 1N5345AE3/TR13 offers cost-effective general-purpose performance. |
| MMBZ5236BS | Surface-mount SOD-123 package; 8.2 V nominal VZ; 200 mW power rating; not drop-in compatible | Used in space-constrained PCBs where axial leads are impractical; unsuitable for 5 W dissipation | Choose MMBZ5236BS only for low-power, high-density layouts; 1N5345AE3/TR13 remains necessary for 5 W thermal management and surge robustness. |
Compared with 1N5345B and MMBZ5236BS, the 1N5345AE3/TR13 uniquely balances axial-leaded mechanical reliability, 5 W power handling, ±10% tolerance for cost-sensitive regulation, and MIL-qualified screening readiness - making it optimal for industrial power supplies and ruggedized embedded systems.
Availability
1N5345AE3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, and overvoltage protection circuits requiring stable component supply, long-term obsolescence mitigation, and RoHS-compliant sourcing.
Supply support for 1N5345AE3/TR13 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 timing solutions for aerospace, defense, and industrial markets.
The 1N53xx series was designed for robust, high-power voltage regulation in harsh environments - emphasizing thermal resilience, surge immunity, and extended temperature operation from –65°C to +150°C.
FAQ
What is the Zener voltage tolerance of the 1N5345AE3/TR13?
The 1N5345AE3/TR13 has a Zener voltage tolerance of ±10%, indicated by the "A" suffix in its part number. This means its actual regulation voltage falls between 7.83 V and 9.57 V at 150 mA test current and 25°C lead temperature. The e3 suffix confirms RoHS compliance, and TR13 denotes tape-and-reel packaging per EIA-296 standard.
Can the 1N5345AE3/TR13 be used in surface-mount designs?
No - the 1N5345AE3/TR13 uses axial-leaded T-18 (DO-204AL) packaging and is not compatible with surface-mount assembly processes. For SMT equivalents, Microsemi offers the SMBJ5345B or SMBG5345B in SMB/SMBG packages; however, those parts differ in thermal performance, surge rating, and footprint, and are not direct replacements for the 1N5345AE3/TR13.
What is the maximum surge current rating for the 1N5345AE3/TR13?
The 1N5345AE3/TR13 has a maximum non-recurrent surge current (IZSM) of 9.5 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating assumes proper PCB layout with adequate copper area and is validated per Microsemi's published test conditions - enabling reliable transient suppression in power rails without device failure.
How does the thermal resistance of the 1N5345AE3/TR13 affect its power handling?
The 1N5345AE3/TR13 has a junction-to-lead thermal resistance of 25 °C/W when leads are trimmed to 3/8 inch (10 mm) from the body. At 25°C ambient, this allows full 5.0 W dissipation; above that temperature, derating is required per Figure 1 in the datasheet. Mounting on FR4 with 4 mm² copper pads increases thermal resistance to 85 °C/W, limiting steady-state power to 1.47 W.
Is the 1N5345AE3/TR13 suitable for automotive applications?
Yes - the 1N5345AE3/TR13 operates from –65°C to +150°C and meets MIL-PRF-19500 screening requirements when ordered with MQ/MX/MV prefixes (e.g., MX1N5345AE3/TR13). Its nonsensitivity to ESD (MIL-STD-750 Method 1020), 9.5 A surge rating, and moisture Level 1 classification make it appropriate for under-hood and body-control module use, provided thermal design accommodates its 25 °C/W junction-to-lead resistance.
1N5345AE3/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 8.7 V
- Tolerance:
- ±10%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 6.25 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- T-18
1N5345AE3/TR13 FAQ
1.How can I place an order for 1N5345AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5345AE3/TR13 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 1N5345AE3/TR13 reliable?
The price and inventory of 1N5345AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5345AE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5345AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5345AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5345AE3/TR13?
1N5345AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5345AE3/TR13 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 1N5345AE3/TR13?
For technical support, including 1N5345AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5345AE3/TR13 requirements.
6.How does Aetrix verify that 1N5345AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5345AE3/TR13 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 1N5345AE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5345AE3/TR13?
All 1N5345AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5345AE3/TR13, 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 1N5345AE3/TR13 part is unused and in its original packaging.
Return procedure for 1N5345AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5345AE3/TR13 Tags
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