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Microchip Technology 1N5348E3/TR12
- Part No.:
- 1N5348E3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5348E3/TR12.pdf
- Description:
- DIODE ZENER 11V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,665
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Product details
Overview
1N5348E3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 11 V, ±5% tolerance (B-suffix equivalent), 125 mA maximum Zener current (IZM), 2.5 Ω dynamic impedance (ZZ), and 0.25 V voltage regulation (ΔVZ) - used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5348E3/TR12 datasheet, 1N5348E3/TR12 pinout, 1N5348E3/TR12 application, or 1N5348E3/TR12 equivalent, key selection criteria include Zener voltage stability under varying load current, thermal resistance (25 °C/W junction-to-lead), RoHS compliance (e3 suffix), and tape-and-reel packaging (TR12) for automated assembly.
Technical Context
This device operates as a two-terminal voltage regulator in reverse-biased mode, with cathode indicated by a band and required to be held positive relative to the anode. Its 11 V Zener voltage is specified at 125 mA test current (IZT) and measured at 25 °C lead temperature (TL).
It delivers stable regulation across -65 °C to +150 °C operating range, with 25 °C/W thermal resistance when leads are trimmed to 3/8 inch (10 mm) from body, and supports surge currents up to 8.0 A (8.3 ms half-sine) without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V ±5% - defines regulated output voltage in shunt configuration at 125 mA IZT |
| Power Dissipation | 5.0 W at TL = 25 °C - requires heat sinking beyond 25 °C lead temperature per derating curve |
| Dynamic Impedance (ZZ) | 2.5 Ω - low impedance ensures minimal voltage shift under load current variation |
| Voltage Regulation (ΔVZ) | 0.25 V - difference between VZ at 10% and 50% of IZM, indicating tight regulation linearity |
| Max Reverse Current (IR) | 5.0 μA at VR = 8.0 V - confirms low leakage below knee voltage, critical for standby power integrity |
| Surge Current (IZSM) | 8.0 A (8.3 ms half-sine) - enables transient overvoltage clamping without failure |
| Thermal Resistance | 25 °C/W junction-to-lead - determines required PCB copper area and lead length for thermal management |
Pinout & Package
Package: Axial-leaded T-18 plastic encapsulated case (Void-free UL94V-0 epoxy), cathode identified by color band. Leads are RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for reverse bias | Connected to system ground or lower-potential rail; current flows into cathode during regulation |
| Cathode | Regulated output node | Banded end; held at stable 11 V above anode; connects to feedback point or protected circuit input |
Key Features
| Feature | Design Value |
|---|---|
| RoHS Compliant (e3 suffix) | Meets EU Directive 2011/65/EU; no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE |
| Tape-and-Reel Packaging (TR12) | Standard EIA-296 compliant reel; enables high-speed SMT placement despite axial form factor |
| Moisture Sensitivity Level 1 | No dry pack required; safe for standard reflow without baking prior to assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020; eliminates need for special handling in production |
| High Surge Withstand | Rated for 8.0 A non-recurrent surge (8.3 ms); protects downstream ICs from line transients |
Applications
| Switching Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Zener diode provides precise 11 V reference for TL431 or similar shunt regulator IC. Use Value: Ensures ±1% output regulation accuracy over temperature and line/load variations due to low ΔVZ (0.25 V) and stable VZ tolerance. | Use Scenario: Provides stable excitation voltage for bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Acts as fixed-voltage reference source for ratiometric analog signal conditioning. Use Value: Delivers <5 μA leakage at 8 V reverse bias, minimizing sensor offset drift and enabling 16-bit ADC resolution. |
| Overvoltage Clamp Circuit | Programmable Threshold Detector |
Use Scenario: Placed across microcontroller I/O pins to clamp ESD or inductive kickback transients. IC Role / Device Role / Timing Role: Shunt protection device limiting voltage to 11 V during surge events. Use Value: Withstands 8.0 A surge (8.3 ms) without parametric shift, preserving system reliability per IEC 61000-4-2 Level 4. | Use Scenario: Configured with resistor divider to trigger comparator when input exceeds 11 V threshold. IC Role / Device Role / Timing Role: Precision voltage threshold element in battery monitoring or fault detection circuits. Use Value: ±5% VZ tolerance and 2.5 Ω ZZ ensure repeatable trip point within ±0.55 V across production lots and temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5348B | Same 11 V, ±5%, 5 W rating; non-RoHS tin-lead plating; bulk packaging | Lacks e3 RoHS compliance and TR12 tape-and-reel; suitable only for legacy or non-regulated environments | Select if RoHS exemption applies and manual assembly is used |
| SMBJ5348B | Surface-mount SMB package; identical electrical specs; 25 °C/W junction-to-case vs. 25 °C/W junction-to-lead | Requires PCB layout change; better thermal performance on heatsinked pads but no axial mounting flexibility | Choose for space-constrained designs where automated reflow is preferred over through-hole insertion |
Compared with 1N5348B and SMBJ5348B, the 1N5348E3/TR12 uniquely combines RoHS compliance, tape-and-reel readiness, and axial-leaded mechanical robustness-making it optimal for industrial power supplies requiring both regulatory conformance and high-volume automated assembly.
Availability
1N5348E3/TR12 is available at Aetrix Electronics and suitable for switching power supplies, industrial sensor interfaces, overvoltage protection circuits, and programmable threshold detectors requiring stable component supply and full RoHS compliance.
Supply support for 1N5348E3/TR12 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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal stability, surge resilience, and long-term parametric consistency.
FAQ
What is the Zener voltage tolerance of the 1N5348E3/TR12?
The 1N5348E3/TR12 has a nominal Zener voltage of 11 V with ±5% tolerance, consistent with the "B" suffix designation in the 1N53xxB family. This tolerance is verified at 125 mA test current and 25 °C lead temperature, and applies across the full operating temperature range of -65 °C to +150 °C.
Does the 1N5348E3/TR12 require dry packing before reflow soldering?
No, the 1N5348E3/TR12 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it is not hygroscopic and does not require dry packing or baking prior to standard reflow soldering. The void-free UL94V-0 epoxy body ensures reliable performance without preconditioning.
What is the maximum surge current rating for the 1N5348E3/TR12?
The 1N5348E3/TR12 is rated for a maximum non-recurrent surge current (IZSM) of 8.0 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating is validated per Microsemi's characterization and enables robust transient suppression in power rails and I/O protection circuits.
How does the thermal resistance of the 1N5348E3/TR12 affect PCB layout?
The 1N5348E3/TR12 has a junction-to-lead thermal resistance of 25 °C/W when leads are trimmed to 3/8 inch (10 mm) from the body. To maintain safe junction temperature, PCB traces connected to its leads must provide adequate copper area and minimize thermal isolation-especially critical when operating near 5 W dissipation at elevated ambient temperatures.
Is the 1N5348E3/TR12 compatible with lead-free soldering processes?
Yes, the 1N5348E3/TR12 features RoHS-compliant matte-tin plating and is qualified for lead-free reflow soldering at 260 °C for 10 seconds maximum. Its UL94V-0 epoxy body withstands repeated thermal cycling without delamination or parameter shift, ensuring reliability in modern assembly lines.
1N5348E3/TR12 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):
- 11 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 8 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
1N5348E3/TR12 FAQ
1.How can I place an order for 1N5348E3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5348E3/TR12 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 1N5348E3/TR12 reliable?
The price and inventory of 1N5348E3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5348E3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5348E3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5348E3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5348E3/TR12?
1N5348E3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5348E3/TR12 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 1N5348E3/TR12?
For technical support, including 1N5348E3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5348E3/TR12 requirements.
6.How does Aetrix verify that 1N5348E3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5348E3/TR12 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 1N5348E3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5348E3/TR12?
All 1N5348E3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5348E3/TR12, 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 1N5348E3/TR12 part is unused and in its original packaging.
Return procedure for 1N5348E3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5348E3/TR12 Tags
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