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Microchip Technology 1N5343AE3/TR13
- Part No.:
- 1N5343AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5343AE3/TR13.pdf
- Description:
- DIODE ZENER 7.5V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,187
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Product details
Overview
1N5343AE3/TR13 from Microsemi is a 5 W axial-leaded Zener diode with nominal regulation voltage of 7.5 V, ±10% tolerance (A suffix), 175 mA test current (IZT), 1.5 Ω maximum dynamic impedance (ZZ), and 630 mA maximum Zener current (IZM). It operates from –65°C to +150°C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5343AE3/TR13 datasheet, 1N5343AE3/TR13 pinout, 1N5343AE3/TR13 application, or 1N5343AE3/TR13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (10.7 A), reverse leakage at VR = 5.4 V (10 µA max), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This discrete Zener diode functions as a two-terminal voltage regulator in shunt configuration, maintaining stable output voltage across wide operating current (10–630 mA) and temperature (–65°C to +150°C) ranges. Its low dynamic impedance (1.5 Ω) ensures minimal voltage variation under load transients.
The device uses void-free thermosetting epoxy encapsulation (UL94V-0), cathode-indicating band polarity, and is rated for 5.0 W steady-state dissipation at 25°C lead temperature (3/8″ from body). Thermal resistance is 25 °C/W junction-to-lead and 85 °C/W junction-to-ambient on FR4 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V ±10% - defines regulated output voltage under IZT = 175 mA; high tolerance allows cost-effective use where tight regulation not required. |
| Test Current (IZT) | 175 mA - standardized bias point for VZ measurement; design must ensure minimum operating current ≥10% IZM (63 mA) for stable regulation. |
| Dynamic Impedance (ZZ) | 1.5 Ω max - low series resistance enables <100 mV ΔVZ across 10–50% IZM range, critical for ripple suppression in analog references. |
| Max Zener Current (IZM) | 630 mA - maximum continuous DC current at TL = 25°C; derates linearly above 25°C per Figure 1 (25 °C/W thermal resistance). |
| Surge Current (IZSM) | 10.7 A - peak non-repetitive 8.3 ms half-sine rating; supports transient overvoltage clamping without failure in power rail protection. |
| Reverse Leakage (IR) | 10 µA max @ VR = 5.4 V - low off-state current minimizes quiescent power loss in high-impedance bias networks. |
| Thermal Resistance | 25 °C/W junction-to-lead - enables high-power operation with simple lead heatsinking; 85 °C/W on FR4 requires copper pad design for >1.47 W dissipation. |
Pinout & Package
Package: T-18 axial-leaded plastic case (void-free UL94V-0 epoxy), 0.7 g weight, cathode indicated by colored band. Leads are annealed matte-tin plated (RoHS-compliant, solderable per MIL-STD-750 Method 2026).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink terminal in reverse-bias regulation mode | Connected to circuit ground or lower-potential node; must handle full IZM current and associated power dissipation. |
| Cathode | Regulated voltage output terminal | Banded end; connected to voltage node requiring stabilization; polarity reversal causes forward conduction (VF ≤ 1.2 V @ 1 A). |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures mechanical and electrical interchangeability across manufacturers for 1N53xx series; simplifies second-source qualification. |
| Moisture sensitivity Level 1 | No dry pack required before PCB assembly-reduces handling cost and eliminates bake step for SMT reflow compatibility. |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020-enables safe handling in standard lab environments without special grounding protocols. |
| High surge current capability | 10.7 A 8.3 ms half-sine rating-provides robust transient immunity in industrial power supplies and automotive load-dump scenarios. |
| e3 RoHS-compliant plating | Matte-tin termination meets EU RoHS Directive 2011/65/EU and China RoHS; compatible with Pb-free and SnPb solder processes. |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp for Microcontroller I/O |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback or forward converter secondary-side regulation. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise error signal to optocoupler input or TL431 comparator. Use Value: Maintains ±10% output regulation across line/load/temperature with 1.5 Ω dynamic impedance limiting feedback loop ripple. |
Use Scenario: Protecting 3.3 V or 5 V GPIO pins from ESD or inductive kickback in industrial sensors. IC Role / Device Role / Timing Role: Passive clamp diverting transient energy to ground before IC damage threshold is exceeded. Use Value: 10.7 A surge rating and 7.5 V clamping voltage limit pin stress below 8 V, preserving I/O integrity per IEC 61000-4-2 Level 4. |
| Programmable Voltage Threshold Detector | Temperature-Stable Bias Network |
Use Scenario: Setting trip point for comparator-based undervoltage lockout (UVLO) or brownout detection circuits. IC Role / Device Role / Timing Role: Fixed reference node enabling hysteresis-free threshold comparison against monitored rail. Use Value: –65°C to +150°C operating range and low ΔVZ (0.15 V) ensure consistent trip point across automotive under-hood environments. |
Use Scenario: Generating stable bias current for op-amp input stages or transistor amplifiers in instrumentation front-ends. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source establishing predictable quiescent operating points. Use Value: 10 µA IR at 5.4 V and 1.5 Ω ZZ minimize current-source error and thermal drift in precision analog designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5343B | Same VZ (7.5 V), but ±5% tolerance (B suffix) and higher IZM (630 mA unchanged); identical package and thermal specs. | Preferred where tighter voltage accuracy is required without changing layout or thermal design. | Select 1N5343B when ±5% VZ tolerance is needed; no PCB changes required due to identical pinout and footprint. |
| MMBZ5231BS | Surface-mount SOD-123 package, 500 mW rating, 7.5 V ±5%, 10 mA IZT, 17 Ω ZZ - lower power, higher impedance, different form factor. | Suitable only for low-current bias/reference; cannot replace 1N5343AE3/TR13 in 5 W power regulation roles. | Choose MMBZ5231BS only for space-constrained, low-power designs; requires new layout and thermal analysis. |
Compared with 1N5343AE3/TR13, the 1N5343B offers improved voltage accuracy at same power level, while MMBZ5231BS trades power handling and thermal performance for miniaturization-neither is drop-in, but both serve distinct design priorities.
Availability
1N5343AE3/TR13 is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp for microcontroller I/O, and programmable voltage threshold detector applications requiring stable component supply and long-term obsolescence management.
Supply support for 1N5343AE3/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 discrete components for aerospace, defense, and industrial markets.
The 1N53xx series was designed as a JEDEC-standardized, high-power Zener platform for ruggedized voltage regulation in harsh-environment power systems-emphasizing thermal robustness, surge resilience, and long-term stability.
FAQ
What is the Zener voltage tolerance of the 1N5343AE3/TR13?
The 1N5343AE3/TR13 has a Zener voltage tolerance of ±10%, indicated by the "A" suffix in its part number. This means its nominal 7.5 V regulation voltage falls within 6.75 V to 8.25 V at 175 mA test current and 25°C lead temperature. The e3 suffix confirms RoHS compliance, and TR13 denotes tape-and-reel packaging per EIA-296.
Can the 1N5343AE3/TR13 be used in surface-mount designs?
No, the 1N5343AE3/TR13 is an axial-leaded T-18 package device and is not suitable for surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5343B or SMBG5343B in DO-214AA/DO-214AB packages-these share the same 7.5 V Zener voltage but differ in thermal performance, surge rating, and mounting method.
What is the maximum power dissipation of the 1N5343AE3/TR13 at ambient temperature?
The 1N5343AE3/TR13 dissipates up to 5.0 W at 25°C lead temperature (TL), but its steady-state power on FR4 PCB is limited to 1.47 W at 25°C ambient (TA) due to higher junction-to-ambient thermal resistance (85 °C/W). Derating follows a linear curve beyond 25°C per Figure 1 in the datasheet.
How does the 1N5343AE3/TR13 handle electrostatic discharge (ESD)?
The 1N5343AE3/TR13 is nonsensitive to ESD per MIL-STD-750 Method 1020, meaning it withstands typical handling ESD events without degradation. This eliminates the need for special ESD precautions during manual assembly or bench testing-unlike many low-power Zeners that require strict static control.
What is the reverse leakage current specification for the 1N5343AE3/TR13?
The 1N5343AE3/TR13 specifies a maximum reverse leakage current (IR) of 10 µA at VR = 5.4 V (72% of VZ), measured at 25°C. This low leakage supports high-impedance bias networks and minimizes standby power loss in battery-operated or energy-sensitive applications.
1N5343AE3/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):
- 7.5 V
- Tolerance:
- ±10%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 5.4 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
1N5343AE3/TR13 FAQ
1.How can I place an order for 1N5343AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5343AE3/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 1N5343AE3/TR13 reliable?
The price and inventory of 1N5343AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5343AE3/TR13 is usually 5 days.
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Once your 1N5343AE3/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 1N5343AE3/TR13?
For technical support, including 1N5343AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5343AE3/TR13 requirements.
6.How does Aetrix verify that 1N5343AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5343AE3/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 1N5343AE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5343AE3/TR13?
All 1N5343AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5343AE3/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 1N5343AE3/TR13 part is unused and in its original packaging.
Return procedure for 1N5343AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5343AE3/TR13 Tags
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MM5Z5V1ST1G
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