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Microchip Technology 1N5351E3/TR13
- Part No.:
- 1N5351E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5351E3/TR13.pdf
- Description:
- DIODE ZENER 14V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:7,760
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Product details
Overview
1N5351E3/TR13 from Microsemi is a 14 V, ±5% tolerance, 5 W axial-leaded silicon Zener diode optimized for voltage regulation in power supply reference and overvoltage protection circuits. It delivers 100 mA maximum Zener current (IZM) at 25°C lead temperature, exhibits 2.5 Ω dynamic impedance (ZZ) at 100 mA test current, and operates across –65°C to +150°C.
For engineers reviewing the 1N5351E3/TR13 datasheet, 1N5351E3/TR13 pinout, 1N5351E3/TR13 application, or 1N5351E3/TR13 equivalent, key selection criteria include its 14 V nominal Zener voltage, 5 W steady-state power rating with 25 °C/W junction-to-lead thermal resistance, RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR13).
Technical Context
This device functions as a precision shunt voltage regulator, maintaining stable output voltage across wide operating current (100 mA IZM) and temperature (–65°C to +150°C) ranges. Its low 2.5 Ω dynamic impedance ensures minimal voltage variation under load changes, while the 0.25 V voltage regulation (ΔVZ) quantifies deviation between 10% and 50% of IZM.
The 1N5351E3/TR13 uses a void-free thermosetting epoxy T-18 package with cathode band polarity marking, rated for 260°C soldering (10 s), and meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity-no dry pack required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.0 V ±5% - precise reference voltage for feedback loops and clamping |
| Power Dissipation (Pd) | 5.0 W at TL = 25°C - supports high-current regulation with adequate heat sinking |
| Zener Test Current (IZT) | 100 mA - defined operating point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 2.5 Ω at IZT - low AC resistance ensures tight voltage regulation under varying load |
| Max Reverse Current (IR) | 1.0 μA at VR = 10.1 V - guarantees low leakage in standby or high-impedance bias networks |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal design with 3/8″ (10 mm) lead length from body |
| Voltage Regulation (ΔVZ) | 0.25 V - difference between VZ measured at 10% and 50% of IZM, indicating line regulation stability |
Pinout & Package
T-18 axial-leaded plastic package with cathode indicated by color band; leads are RoHS-compliant annealed matte-tin plated per MIL-STD-750 Method 2026; weight: 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential node; forward voltage ≤1.2 V @ 1.0 A |
| Cathode | Current exit terminal during reverse-biased Zener operation | Banded end; connected to higher-potential node for voltage clamping/regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions and electrical behavior across global supply chain |
| RoHS-compliant (e3 suffix) | Meets environmental compliance without performance trade-offs; matte-tin plating ensures solderability |
| Level 1 moisture sensitivity | No dry pack or baking required before assembly-reduces manufacturing overhead |
| High surge current rating (IZSM) | 6.7 A peak (8.3 ms half-sine) - withstands transient overvoltage events in power rails |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special ESD handling in production |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Shunt reference element providing stable 14 V reference to TL431 or similar error amplifier. Use Value: Maintains ±5% output accuracy across line/load/temperature with 2.5 Ω ZZ minimizing feedback loop gain variation. |
Use Scenario: Clamps transient spikes on 12 V automotive or industrial DC bus lines. IC Role / Device Role / Timing Role: Passive crowbar element diverting excess energy to ground when voltage exceeds 14.7 V (VZ + 5%). Use Value: Absorbs 5 W continuously and 6.7 A surges (8.3 ms), protecting downstream MOSFETs and controllers. |
| Programmable Voltage Reference | DC-DC Converter Bias Network |
Use Scenario: Sets precise threshold in adjustable LDO enable circuit or comparator hysteresis network. IC Role / Device Role / Timing Role: Stable 14 V reference source for resistor-divider scaling into op-amp inputs. Use Value: Delivers <1 μA leakage at 10.1 V and 0.25 V ΔVZ, ensuring threshold stability over temperature and aging. |
Use Scenario: Provides regulated bias voltage to gate drivers or control ICs in high-efficiency buck converters. IC Role / Device Role / Timing Role: Local shunt regulator supplying clean 14 V to bootstrap circuitry or level-shifters. Use Value: Supports 100 mA IZM with 25 °C/W RθJL-enables compact heatsinking on FR4 board with 4 mm² copper pads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5351B | No e3 RoHS suffix; tin-lead plating instead of matte-tin; identical electrical specs and T-18 package | Suitable for legacy non-RoHS assemblies or where Pb-based solder is used | Select 1N5351B only if RoHS exemption applies; otherwise prefer 1N5351E3/TR13 for compliance |
| MMSZ5241ET1G | Surface-mount SOD-123 package; 14 V ±5%; 500 mW rating; 17 Ω ZZ @ 20 mA | Limited to low-power bias/reference use; not suitable for 5 W dissipation or surge clamping | Choose MMSZ5241ET1G only for space-constrained PCBs where power demand is <0.5 W |
Compared with 1N5351B and MMSZ5241ET1G, the 1N5351E3/TR13 uniquely combines RoHS compliance, 5 W power handling, axial-leaded through-hole mounting, and 2.5 Ω dynamic impedance-making it optimal for industrial power supply regulation where thermal robustness and legacy compatibility matter.
Availability
1N5351E3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable voltage references requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5351E3/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 semiconductor company specializing in high-reliability analog, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xxB/E3 series was designed for ruggedized voltage regulation in harsh-environment power systems-emphasizing thermal resilience, surge immunity, and long-term parametric stability.
FAQ
What is the Zener voltage tolerance of the 1N5351E3/TR13?
The 1N5351E3/TR13 has a nominal Zener voltage of 14.0 V with a ±5% tolerance, as indicated by the "B" suffix in its base part number (1N5351B). This tolerance is confirmed in the Electrical Characteristics table on page 1 of the Microsemi datasheet, where 1N5351B shows VZ = 14 V and tolerance column specifies ±5%.
Does the 1N5351E3/TR13 meet RoHS requirements?
Yes, the 1N5351E3/TR13 complies with RoHS directives, as explicitly stated in the Features section ("RoHS Compliant devices available by adding e3 suffix") and confirmed by the "e3" suffix in the full part number. Its leads use RoHS-compliant annealed matte-tin plating per MIL-STD-750 Method 2026.
What is the maximum Zener current (IZM) for the 1N5351E3/TR13 at 25°C?
The 1N5351E3/TR13 supports a maximum Zener current (IZM) of 100 mA at TL = 25°C, derived from Pd = 5.0 W and VZ = 14.0 V (IZM = Pd / VZ × 0.95 for ±5% tolerance upper limit). This value matches the "MAXIMUM REGULATOR CURRENT (IZM)" column for 1N5351B in the datasheet's Electrical Characteristics table.
What does the "TR13" suffix indicate in 1N5351E3/TR13?
The "TR13" suffix denotes tape-and-reel packaging per EIA-296 standard, with 13-inch reels. As noted in the Mechanical and Packaging section, this option is enabled by adding "TR" to the base part number; "TR13" specifies the reel size. The device remains electrically and mechanically identical to bulk or ammo-pack versions.
How is polarity marked on the 1N5351E3/TR13?
The 1N5351E3/TR13 uses a cathode band marking on the epoxy body to indicate polarity. Per the Mechanical and Packaging section, "Cathode indicated by band. Diode to be operated with the banded end positive with respect to the opposite end"-meaning the banded end is the cathode terminal during Zener operation.
1N5351E3/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):
- 14 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 10.1 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
1N5351E3/TR13 FAQ
1.How can I place an order for 1N5351E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5351E3/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 1N5351E3/TR13 reliable?
The price and inventory of 1N5351E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5351E3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5351E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5351E3/TR13 transactions.
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4.How is shipping managed for 1N5351E3/TR13?
1N5351E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5351E3/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 1N5351E3/TR13?
For technical support, including 1N5351E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5351E3/TR13 requirements.
6.How does Aetrix verify that 1N5351E3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5351E3/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 1N5351E3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5351E3/TR13?
All 1N5351E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5351E3/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 1N5351E3/TR13 part is unused and in its original packaging.
Return procedure for 1N5351E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5351E3/TR13 Tags
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