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Microchip Technology 1N5351E3/TR12
- Part No.:
- 1N5351E3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5351E3/TR12.pdf
- Description:
- DIODE ZENER 14V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:7,012
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Product details
Overview
1N5351E3/TR12 from Microsemi is a 14 V, ±5% tolerance, 5 W axial-leaded silicon Zener diode optimized for voltage regulation in power supply feedback loops, overvoltage protection circuits, and precision reference applications. It delivers 100 mA maximum Zener current (IZM), 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/TR12 datasheet, 1N5351E3/TR12 pinout, 1N5351E3/TR12 application, or 1N5351E3/TR12 equivalent, key selection criteria include its 14 V nominal Zener voltage, 5 W steady-state power rating at TL < 25°C with 3/8″ lead length, low 0.25 V voltage regulation (ΔVZ), and RoHS-compliant matte-tin plating per MIL-STD-750 Method 2026.
Technical Context
This device functions as a two-terminal voltage reference where reverse-biased operation maintains stable output voltage under varying load and line conditions. Its 25 °C/W junction-to-lead thermal resistance enables reliable 5 W dissipation with minimal heatsinking when leads are trimmed to 10 mm from body.
The 1N5351E3/TR12 features a 14 V nominal Zener voltage measured at 100 mA (IZT), 2.5 Ω dynamic impedance at IZT, and 0.25 V voltage regulation (ΔVZ) between 10% and 50% of IZM - confirming tight regulation across its operating current range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14 V ±5% - precise reference point for feedback or clamping at nominal 14 V |
| Test Current (IZT) | 100 mA - standardized bias point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 2.5 Ω - low AC resistance ensures minimal voltage shift under dynamic load changes |
| Max Regulator Current (IZM) | 100 mA - maximum continuous DC current before exceeding 5 W power limit at TL = 25°C |
| Voltage Regulation (ΔVZ) | 0.25 V - difference between VZ at 10% and 50% of IZM, indicating stability over operating range |
| Thermal Resistance (RθJL) | 25 °C/W - junction-to-lead resistance enables predictable temperature rise with 5 W dissipation |
| Reverse Current (IR) | 1.0 μA max @ 10.1 V - low leakage preserves accuracy in high-impedance reference nodes |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by band; leads are annealed matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower potential; forward voltage ≤1.2 V @ 1 A |
| Cathode | Zener regulation terminal / Output reference node | Banded end; reverse-biased to maintain 14 V reference; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 5 W Zener | Industry-standard compliance ensures interchangeability and design confidence in legacy systems |
| ±5% voltage tolerance (B suffix) | Reduces need for post-assembly trimming in mid-precision voltage reference designs |
| RoHS-compliant e3 suffix | Meets global environmental regulations without performance trade-offs or requalification |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints during SMT or manual assembly |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling in standard workstations without special static control infrastructure |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in optocoupler-based feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Zener reference node setting error amplifier threshold and enabling closed-loop regulation. Use Value: 14 V nominal VZ provides stable reference for 12 V output rails; 0.25 V ΔVZ ensures <2% output variation across load transients. |
Use Scenario: Placed across input rail of industrial sensor interface to clamp surges above 14 V. IC Role / Device Role / Timing Role: Two-terminal shunt protector diverting transient energy to ground before downstream ICs are damaged. Use Value: Withstands 100 mA IZM continuously and 10 A surge (IZSM) for 8.3 ms half-sine, meeting IEC 61000-4-5 Level 3 requirements. |
| Precision Voltage Reference | Linear Regulator Bias Network |
Use Scenario: Provides stable 14 V reference for analog front-end calibration in medical data acquisition systems. IC Role / Device Role / Timing Role: Low-drift, low-noise DC reference source for ADC reference buffers and DAC offset correction. Use Value: 2.5 Ω ZZ and 1.0 μA IR at 10.1 V minimize loading error and thermal drift in high-impedance reference paths. |
Use Scenario: Sets base bias voltage for pass transistor in discrete linear regulator delivering 12 V @ 500 mA. IC Role / Device Role / Timing Role: Zener establishes fixed emitter-base differential to control output voltage via transistor gain. Use Value: 5 W power rating allows sustained operation at full load without thermal runaway; 25 °C/W RθJL simplifies thermal design with short leads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5351B | No e3 RoHS suffix; tin-lead plating instead of matte-tin | Not compliant with EU RoHS Directive 2011/65/EU or China RoHS II | Select only for legacy repair or non-RoHS-regulated environments where Pb content is permitted |
| MMBZ5241B (SOT-23) | Surface-mount, 0.5 W rating, 14 V ±5%, 100 Ω ZZ @ 20 mA | Lower power, higher impedance, unsuitable for >50 mA continuous regulation | Choose only for space-constrained PCBs where 5 W dissipation is unnecessary and thermal mass is limited |
Compared with 1N5351B and MMBZ5241B, the 1N5351E3/TR12 uniquely combines JEDEC-standard axial packaging, 5 W power handling, RoHS compliance, and sub-3 Ω dynamic impedance - making it the preferred choice for industrial power supplies requiring field-replaceable, high-reliability Zener regulation.
Availability
1N5351E3/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and precision voltage reference designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5351E3/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 1N53xxB series was designed specifically for robust, high-power voltage regulation in harsh-environment power systems - emphasizing thermal resilience, ESD immunity, and JEDEC-standard interoperability.
FAQ
What is the Zener voltage tolerance for 1N5351E3/TR12?
The 1N5351E3/TR12 has a ±5% Zener voltage tolerance, confirmed by the "B" suffix in its designation per Microsemi's datasheet. This means its actual VZ falls within 13.3 V to 14.7 V at 100 mA test current and 25°C lead temperature. The e3 suffix indicates RoHS compliance but does not affect voltage tolerance specification.
What is the maximum continuous Zener current for 1N5351E3/TR12?
The 1N5351E3/TR12 supports a maximum continuous Zener current (IZM) of 100 mA when operated at TL < 25°C with 3/8″ (10 mm) lead length from the body. This corresponds to its rated 5 W power dissipation. Derating is required above 25°C per the published power derating curve in Figure 1 of the datasheet.
Does 1N5351E3/TR12 require dry packing or moisture barrier bags?
No, the 1N5351E3/TR12 has IPC/JEDEC J-STD-020B moisture sensitivity Level 1, meaning it is not hygroscopic and requires no dry pack, baking, or floor-life controls prior to soldering. This simplifies inventory handling and eliminates moisture-related assembly risks.
What is the cathode marking convention for 1N5351E3/TR12?
The cathode of the 1N5351E3/TR12 is identified by a single color band on the body. During operation, the banded (cathode) end must be held positive relative to the anode to achieve Zener breakdown and voltage regulation. Reverse polarity will result in forward conduction (~1.2 V drop) rather than regulation.
Is 1N5351E3/TR12 suitable for surge protection applications?
Yes, the 1N5351E3/TR12 is rated for a maximum non-recurrent surge current (IZSM) of 10 A for an 8.3 ms half-sine waveform, making it suitable for transient voltage suppression in DC power rails. Its 5 W steady-state rating and low ΔVZ ensure stable clamping behavior during repeated or sustained overvoltage events.
1N5351E3/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):
- 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/TR12 FAQ
1.How can I place an order for 1N5351E3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5351E3/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 1N5351E3/TR12 reliable?
The price and inventory of 1N5351E3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5351E3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5351E3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5351E3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5351E3/TR12?
1N5351E3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5351E3/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 1N5351E3/TR12?
For technical support, including 1N5351E3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5351E3/TR12 requirements.
6.How does Aetrix verify that 1N5351E3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5351E3/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 1N5351E3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5351E3/TR12?
All 1N5351E3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5351E3/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 1N5351E3/TR12 part is unused and in its original packaging.
Return procedure for 1N5351E3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5351E3/TR12 Tags
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