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Microchip Technology 1N5348CE3/TR13
- Part No.:
- 1N5348CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5348CE3/TR13.pdf
- Description:
- DIODE ZENER 11V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,590
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Product details
Overview
1N5348CE3/TR13 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 11 V, ±2% tolerance (C suffix), 2.5 Ω dynamic impedance at 125 mA test current, and maximum reverse current of 5.0 μA at 8.0 V. 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 1N5348CE3/TR13 datasheet, 1N5348CE3/TR13 pinout, 1N5348CE3/TR13 application, or 1N5348CE3/TR13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (8.0 A), voltage regulation (ΔVZ = 0.25 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output voltage across wide current (125 mA IZT to 800 mA IZM) and temperature ranges. Its low dynamic impedance (2.5 Ω) and tight ±2% voltage tolerance ensure minimal deviation under load variation.
The 1N5348CE3/TR13 uses a void-free thermosetting epoxy T-18 package with cathode band marking, rated for 5.0 W steady-state dissipation at 25°C lead temperature and 1.47 W on FR4 board. It meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity and withstands 8.3 ms half-sine surge currents up to 8.0 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V ±2% - precise reference for feedback networks requiring <±0.22 V deviation |
| Test Current (IZT) | 125 mA - operating point where VZ and ZZ are specified; sets minimum stable regulation current |
| Dynamic Impedance (ZZ) | 2.5 Ω - low AC resistance ensures minimal voltage shift under ripple or transient load changes |
| Max Reverse Current (IR) | 5.0 μA at 8.0 V - confirms sharp knee and low leakage below regulation threshold |
| Max Regulator Current (IZM) | 800 mA - maximum DC current before thermal runaway when adequately heat-sunk (TL ≤ 25°C) |
| Voltage Regulation (ΔVZ) | 0.25 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Surge Current (IZSM) | 8.0 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal design with 3/8" lead length; requires heatsinking above ~1.5 W |
Pinout & Package
Package: T-18 axial-leaded plastic case (void-free UL94V-0 epoxy), cathode indicated by colored band; leads plated with RoHS-compliant annealed matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse bias applied between cathode and anode |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to regulated rail; maintains 11 V relative to anode under reverse bias ≥ IZT |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables high-accuracy feedback in switching power supplies without external trimming |
| 25 °C/W junction-to-lead thermal resistance | Supports reliable 5 W operation with simple lead-length heatsinking-no PCB copper pour required |
| 8.0 A non-repetitive surge rating (8.3 ms) | Clamps lightning-induced or inductive-switching transients in industrial control inputs |
| Level 1 moisture sensitivity (J-STD-020B) | Eliminates dry-pack requirement and bake-out prior to assembly-reduces manufacturing cost |
| RoHS-compliant e3 suffix | Meets EU Directive 2011/65/EU and China RoHS II without exemption use |
Applications
| Switching Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters using optocoupler-coupled feedback. IC Role / Device Role / Timing Role: Precision 11 V reference source for TL431-like comparator circuits or direct shunt regulation. Use Value: ±2% tolerance ensures output stays within ±1% of target across line/load/temperature-meets EN 62368-1 safety margin requirements. | Use Scenario: Protecting microcontroller I/O pins from ESD and inductive kickback in automotive body control modules. IC Role / Device Role / Timing Role: Low-leakage (5 μA @ 8 V) shunt clamp that activates only above 11 V, preserving signal integrity below threshold. Use Value: 8.0 A surge rating absorbs 100 A/m surge events per ISO 16750-2 without degradation-extends system lifetime. |
| Industrial Sensor Excitation | Programmable Reference Generator |
Use Scenario: Providing stable excitation voltage to resistive bridge sensors (e.g., strain gauges) in process instrumentation. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source replacing higher-cost references in 4–20 mA transmitter front-ends. Use Value: 0.25 V ΔVZ ensures excitation stability <±0.5% over 10–400 mA load range-improves measurement resolution to 14-bit effective. | Use Scenario: Setting accurate thresholds in programmable logic controllers (PLCs) for analog input channel calibration. IC Role / Device Role / Timing Role: Fixed 11 V node used with resistor dividers to generate multiple precision thresholds (e.g., 2.5 V, 5 V). Use Value: 2.5 Ω ZZ minimizes divider ratio error due to loading-enables <0.1% threshold accuracy without buffer op-amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5348B | Same 11 V nominal voltage but ±5% tolerance (B suffix); 2.5 Ω ZZ; identical IZM and thermal specs | Acceptable where ±5% regulation is sufficient (e.g., non-critical biasing); lower cost than C-suffix | Select 1N5348B if system-level tolerance budget allows >±0.55 V deviation at 11 V |
| MMSZ5242BT1G | Surface-mount SOD-123 package; 11 V ±5%; 100 mW rating; ZZ = 17 Ω at 20 mA; not rated for 5 W operation | Limited to low-power signal-level clamping; unsuitable for power supply regulation or surge handling | Choose MMSZ5242BT1G only for space-constrained PCBs with <10 mA regulation current and no surge exposure |
Compared with 1N5348B and MMSZ5242BT1G, the 1N5348CE3/TR13 delivers tighter voltage control (±2% vs. ±5%), higher power capability (5 W vs. 0.1 W), and robust surge immunity (8.0 A vs. none specified)-making it uniquely suited for industrial-grade power regulation where accuracy and ruggedness are co-required.
Availability
1N5348CE3/TR13 is available at Aetrix Electronics and suitable for switching power supplies, overvoltage protection circuits, industrial sensor excitation, and programmable reference generation requiring stable component supply and long-term obsolescence management.
Supply support for 1N5348CE3/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 radiation-hardened components for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for ruggedized 5 W voltage regulation in harsh-environment power systems-emphasizing thermal robustness, surge resilience, and extended temperature operation.
FAQ
What is the Zener voltage tolerance of the 1N5348CE3/TR13?
The 1N5348CE3/TR13 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its actual regulation voltage falls between 10.78 V and 11.22 V at 125 mA test current and 25°C lead temperature, enabling high-accuracy voltage referencing in critical feedback paths where tighter control than standard ±5% devices is required.
Can the 1N5348CE3/TR13 be used without a heatsink?
The 1N5348CE3/TR13 can operate at full 5 W dissipation only with adequate heatsinking-specifically, when lead temperature (TL) is maintained at ≤25°C, typically achieved with ≥3/8" (10 mm) lead length from the epoxy body. Without heatsinking, its derated power on FR4 board is 1.47 W at 25°C ambient; exceeding this risks thermal runaway and permanent damage to the 1N5348CE3/TR13.
What does the "e3" and "TR13" suffix mean in 1N5348CE3/TR13?
The "e3" suffix indicates RoHS-compliant matte-tin lead plating per JEDEC standards, while "TR13" denotes tape-and-reel packaging per EIA-296, with 13-inch reels. Together, 1N5348CE3/TR13 specifies a lead-free, automated-assembly-ready version of the 11 V Zener diode-distinct from through-hole bulk or ammo-pack variants of the same electrical specification.
How does the voltage regulation (ΔVZ) of 0.25 V impact circuit performance?
The 0.25 V voltage regulation (ΔVZ) of the 1N5348CE3/TR13-defined as the difference between Zener voltage measured at 10% and 50% of IZM-indicates excellent line regulation. In practice, this means the 1N5348CE3/TR13 maintains output voltage within a narrow 0.25 V window across a 400 mA current range (80 mA to 400 mA), reducing need for post-regulation filtering in sensitive analog subsystems.
Is the 1N5348CE3/TR13 suitable for automotive applications?
Yes-the 1N5348CE3/TR13 is qualified for operation from –65°C to +150°C, meets MIL-STD-750 ESD testing (Method 1020), and withstands high surge stresses per ISO 16750-2 pulse definitions. Its T-18 package and RoHS-compliant e3 plating make the 1N5348CE3/TR13 appropriate for under-hood engine control units and body electronics where thermal cycling and transient immunity are critical.
1N5348CE3/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):
- 11 V
- Tolerance:
- ±2%
- 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
1N5348CE3/TR13 FAQ
1.How can I place an order for 1N5348CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5348CE3/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 1N5348CE3/TR13 reliable?
The price and inventory of 1N5348CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5348CE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5348CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5348CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5348CE3/TR13?
1N5348CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5348CE3/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 1N5348CE3/TR13?
For technical support, including 1N5348CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5348CE3/TR13 requirements.
6.How does Aetrix verify that 1N5348CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5348CE3/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 1N5348CE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5348CE3/TR13?
All 1N5348CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5348CE3/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 1N5348CE3/TR13 part is unused and in its original packaging.
Return procedure for 1N5348CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5348CE3/TR13 Tags
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MM5Z5V1ST1G
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