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Microchip Technology 1N5351CE3/TR8
- Part No.:
- 1N5351CE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5351CE3/TR8.pdf
- Description:
- DIODE ZENER 14V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,353
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Product details
Overview
1N5351CE3/TR8 from Microsemi is a 14 V, ±2% 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), 2.5 Ω dynamic impedance (ZZ) at 100 mA test current, and operates across –65°C to +150°C.
For engineers reviewing the 1N5351CE3/TR8 datasheet, 1N5351CE3/TR8 pinout, 1N5351CE3/TR8 application, or 1N5351CE3/TR8 equivalent, key selection criteria include Zener voltage tolerance (±2%), thermal resistance (25 °C/W junction-to-lead), surge current rating (6.7 A), voltage regulation (ΔVZ = 0.25 V), and RoHS-compliant matte-tin plating.
Technical Context
This device functions as a two-terminal voltage reference with sharp reverse-breakdown knee behavior, specified at 100 mA test current (IZT). Its low dynamic impedance (2.5 Ω) ensures minimal output voltage variation under load changes, while its 25 °C/W junction-to-lead thermal resistance enables stable operation up to 5 W when mounted with ≥10 mm lead length from body.
The 1N5351CE3/TR8 exhibits 0.25 V voltage regulation (ΔVZ) between 10% and 50% of IZM, confirming tight regulation across operating current range. Reverse leakage remains ≤1.0 μA at 10.1 V (VR), supporting low-power standby modes in regulated supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.0 V ±2% - precise reference for feedback networks requiring tight DC accuracy |
| Power Dissipation (Pd) | 5.0 W at TL = 25°C - supports high-current regulation without external heatsink if leads are ≥10 mm long |
| Test Current (IZT) | 100 mA - standardized bias point for measuring VZ and ZZ, aligning with typical regulator loop currents |
| Dynamic Impedance (ZZ) | 2.5 Ω - low AC impedance minimizes ripple coupling into reference node |
| Max Regulator Current (IZM) | 670 mA - sets upper limit for sustained DC current before thermal runaway |
| Voltage Regulation (ΔVZ) | 0.25 V - difference between VZ measured at 67 mA and 335 mA, indicating line regulation capability |
| Surge Current (IZSM) | 6.7 A (8.3 ms half-sine) - withstands transient overloads such as input capacitor inrush or lightning-induced surges |
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, RoHS compliant (e3 suffix), weight 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; must be at lower potential than cathode during regulation |
| Cathode | Regulated output node | Banded end; connects to feedback divider or protected rail; maintains stable 14 V under varying load |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables tighter feedback loop control vs. ±5% (B) or ±10% (A) variants, reducing output voltage drift |
| 25 °C/W junction-to-lead thermal resistance | Allows full 5 W dissipation with simple lead-length heat sinking-no PCB copper pour required |
| 0.25 V voltage regulation (ΔVZ) | Ensures <±1.8% output variation across 10–50% of max current, critical for stable reference performance |
| RoHS-compliant matte-tin plating (e3) | Supports lead-free reflow assembly (260°C/10 s) without solderability degradation or whisker risk |
| Moisture sensitivity Level 1 (J-STD-020B) | Eliminates dry-pack requirement and floor-life constraints-ready for immediate SMT or through-hole assembly |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp for 12 V Rail |
|---|---|
Use Scenario: Used in optocoupler-based feedback path of isolated DC-DC converters to regulate 12 V output. IC Role / Device Role / Timing Role: Zener reference providing stable 14 V threshold to drive optocoupler LED, enabling closed-loop voltage control. Use Value: ±2% tolerance ensures output stays within ±1.5% of nominal, meeting industrial PSU specs without trimming. | Use Scenario: Placed across automotive 12 V battery rail to clamp transients above 14 V. IC Role / Device Role / Timing Role: Two-terminal shunt protector diverting surge energy to ground when rail exceeds 14 V. Use Value: 6.7 A surge rating handles ISO 7637-2 Pulse 1/2a events; 0.25 V ΔVZ prevents false triggering near nominal voltage. |
| Precision Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Supplies excitation voltage to bridge-based pressure sensors in process control transmitters. IC Role / Device Role / Timing Role: Stable 14 V reference source for ratiometric sensor biasing, minimizing gain error. Use Value: Low 2.5 Ω dynamic impedance rejects supply ripple; –65°C to +150°C operation supports harsh environments. | Use Scenario: Provides regulated bias to 4–20 mA transmitter front-end circuitry in factory automation modules. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant 14 V on local analog supply rail despite varying load current. Use Value: 670 mA IZM supports multiple op-amps and ADCs; Level 1 moisture rating simplifies inventory management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5351B | Same 14 V nominal, but ±5% tolerance (B suffix) and higher ΔVZ (0.25 V → 0.25 V same, but wider VZ spread) | Acceptable where ±5% output tolerance is sufficient; lower cost for non-critical rails | Select 1N5351B when absolute voltage accuracy is secondary to cost and availability |
| MMSZ5241ET1G | Surface-mount SOD-123 package, 14 V ±5%, 500 mW rating, 15 Ω ZZ - not drop-in; requires layout change | Used in space-constrained PCBs where axial leads are impractical; unsuitable for >500 mW loads | Choose MMSZ5241ET1G only for low-power, high-density designs accepting reduced power handling and accuracy |
Compared with 1N5351B and MMSZ5241ET1G, the 1N5351CE3/TR8 uniquely combines ±2% tolerance, 5 W power handling, axial-leaded serviceability, and RoHS compliance-making it optimal for industrial power supplies needing field-replaceable, high-accuracy references.
Availability
1N5351CE3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and precision voltage reference designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1N5351CE3/TR8 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 for ruggedized voltage regulation in mission-critical power systems, emphasizing wide temperature operation, surge resilience, and long-term parametric stability.
FAQ
What is the Zener voltage tolerance of the 1N5351CE3/TR8?
The 1N5351CE3/TR8 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in the part number. This means its nominal 14.0 V breakdown voltage falls within 13.72 V to 14.28 V at 25°C with 100 mA test current. This tighter tolerance improves regulation accuracy in feedback and reference applications compared to ±5% (B) or ±10% (A) variants.
Can the 1N5351CE3/TR8 be used in surface-mount designs?
No, the 1N5351CE3/TR8 is an axial-leaded T-18 package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5351B series in DO-214AA (SMB) package. The 1N5351CE3/TR8 requires through-hole mounting with ≥10 mm lead length from body to achieve full 5 W power dissipation.
What is the maximum surge current rating for the 1N5351CE3/TR8?
The 1N5351CE3/TR8 has a maximum non-recurrent surge current (IZSM) rating of 6.7 A for an 8.3 ms half-sine waveform. This value is derived from its 5 W power rating and 14 V Zener voltage, enabling robust transient suppression in automotive and industrial power rails without derating.
How does the 1N5351CE3/TR8 handle thermal management?
The 1N5351CE3/TR8 achieves a junction-to-lead thermal resistance of 25 °C/W when mounted with 3/8 inch (10 mm) lead length from body. This allows full 5 W dissipation at 25°C ambient without additional heatsinking. On FR4 PCBs, thermal resistance rises to 85 °C/W, limiting steady-state power to ~1.47 W unless enhanced copper pours are used.
Is the 1N5351CE3/TR8 RoHS compliant?
Yes, the "e3" suffix in 1N5351CE3/TR8 explicitly indicates RoHS compliance. Its leads feature annealed matte-tin plating per MIL-STD-750 Method 2026, qualified for lead-free reflow soldering at 260°C for 10 seconds, and meets IPC/JEDEC J-STD-020B moisture sensitivity Level 1.
1N5351CE3/TR8 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:
- ±2%
- 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
1N5351CE3/TR8 FAQ
1.How can I place an order for 1N5351CE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5351CE3/TR8 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 1N5351CE3/TR8 reliable?
The price and inventory of 1N5351CE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5351CE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5351CE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5351CE3/TR8 transactions.
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4.How is shipping managed for 1N5351CE3/TR8?
1N5351CE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5351CE3/TR8 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 1N5351CE3/TR8?
For technical support, including 1N5351CE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5351CE3/TR8 requirements.
6.How does Aetrix verify that 1N5351CE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5351CE3/TR8 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 1N5351CE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5351CE3/TR8?
All 1N5351CE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5351CE3/TR8, 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 1N5351CE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5351CE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5351CE3/TR8 Tags
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