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Microchip Technology 1N5351C/TR8
- Part No.:
- 1N5351C/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5351C/TR8.pdf
- Description:
- DIODE ZENER 14V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,087
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Product details
Overview
1N5351C/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 14 V, ±2% tolerance (C suffix), 2.5 Ω maximum dynamic impedance at 100 mA test current, and 340 Ω maximum knee impedance at 1 mA. It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5351C/TR8 datasheet, 1N5351C/TR8 pinout, 1N5351C/TR8 application, or 1N5351C/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (6.7 A), and RoHS-compliant e3 packaging with tape-and-reel delivery (TR8).
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output across varying load currents from 1 mA to 670 mA. Its low dynamic impedance (2.5 Ω) and tight ±2% voltage tolerance ensure minimal deviation under line and load transients.
The 1N5351C/TR8 uses a void-free thermosetting epoxy T-18 package with tin-lead or matte-tin plating, rated for 260 °C soldering (10 s), and exhibits <0.25 V regulation change (ΔVZ) between 10% and 50% of max Zener current - critical for analog reference stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14 V ±2% - precise regulation point for 12–15 V rail clamping and reference generation |
| Test Current (IZT) | 100 mA - defines operating point where VZ and ZZ are specified |
| Dynamic Impedance (ZZ) | 2.5 Ω max at IZT - ensures low AC ripple rejection in feedback loops |
| Max Regulator Current (IZM) | 670 mA - maximum DC current at 25 °C lead temperature with adequate heatsinking |
| Surge Current (IZSM) | 6.7 A - peak non-repetitive half-sine (8.3 ms) capability for transient suppression |
| Voltage Regulation (ΔVZ) | 0.25 V max - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables 5 W dissipation with modest heatsinking at 3/8″ lead length |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC TO-204-AD), void-free thermosetting epoxy body meeting UL94V-0; cathode indicated by band; leads plated with annealed matte-tin (RoHS e3 compliant); weight 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to circuit ground or lower-potential node during regulation; carries full Zener current when reverse biased |
| Cathode | Reverse-bias voltage reference terminal | Banded end; connected to regulated voltage node; establishes 14 V reference relative to anode under reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables tighter regulation than standard ±5% (B) or ±10% (A) parts, reducing need for post-regulation trimming |
| Moisture sensitivity Level 1 per J-STD-020B | Eliminates dry-pack requirement and floor-life constraints, simplifying SMT assembly logistics |
| Nonsensitive to ESD per MIL-STD-750 Method 1020 | Reduces handling precautions and eliminates need for ESD-protected workstations in production |
| 5.0 W steady-state power at TL = 25 °C | Supports high-current shunt regulation without external active devices in mid-power applications |
| RoHS-compliant e3 marking | Confirms lead-free plating and halogen-free epoxy, satisfying EU Directive 2011/65/EU compliance requirements |
Applications
| Industrial Power Supply Reference | Overvoltage Clamp for 12 V Systems |
|---|---|
Use Scenario: Providing stable 14 V reference for feedback control in isolated DC-DC converters delivering 5–24 V outputs. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference establishing error amplifier setpoint. Use Value: ±2% tolerance and 2.5 Ω dynamic impedance minimize output drift across line/load variations and temperature. | Use Scenario: Clamping transient spikes on automotive 12 V battery rails during load dump or alternator surges. IC Role / Device Role / Timing Role: Passive overvoltage protector diverting excess energy to ground before downstream ICs are damaged. Use Value: 6.7 A surge rating and 0.25 V ΔVZ ensure predictable clamping threshold under repetitive stress events. |
| Programmable Voltage Monitor Threshold | Low-Power Sensor Bias Reference |
Use Scenario: Setting trip point for comparator-based undervoltage/overvoltage detection circuits in PLC I/O modules. IC Role / Device Role / Timing Role: Precision voltage threshold generator referenced to system ground. Use Value: Tight 14 V ±2% tolerance eliminates calibration steps and supports deterministic fault response timing. | Use Scenario: Supplying stable bias voltage to analog sensor front-ends (e.g., RTD bridges, strain gauges) in environmental monitoring nodes. IC Role / Device Role / Timing Role: Low-noise, low-drift DC reference source independent of supply rail fluctuations. Use Value: 25 °C/W thermal resistance and <0.25 V regulation shift enable stable bias under ambient temperature swings from –40 °C to +85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5351B/TR8 | ±5% tolerance (vs. ±2% for 1N5351C/TR8); otherwise identical electrical specs and package | Acceptable where 14 V ±0.7 V variation is permissible; lower cost for non-critical references | Select when budget constraints outweigh need for tight regulation; verify loop stability with higher ZZ spread |
| MMSZ5241ET1G | Surface-mount SOD-123 package (vs. axial T-18); 14 V ±5%, 500 mW rating (vs. 5 W); 30 Ω ZZ | Only suitable for low-power signal-level referencing; cannot replace in shunt-regulator or surge-clamp roles | Choose only for space-constrained PCBs with <100 mA load current; requires derating for thermal performance |
Compared with 1N5351B/TR8, the 1N5351C/TR8 delivers tighter voltage control critical for closed-loop feedback, while MMSZ5241ET1G offers footprint reduction at the expense of power handling and regulation precision - making it unsuitable as a direct functional substitute.
Availability
1N5351C/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, automotive overvoltage protection, and programmable voltage monitoring requiring stable component supply and RoHS-compliant packaging.
Supply support for 1N5351C/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, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N53xx series was designed for robust, high-power voltage regulation in harsh environments - emphasizing thermal resilience, surge survivability, and long-term parametric stability under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N5351C/TR8?
The 1N5351C/TR8 has a Zener voltage tolerance of ±2%, as indicated by the "C" suffix in its part number. This means its nominal 14 V regulation point falls within 13.72 V to 14.28 V at 25 °C lead temperature. This tighter tolerance supports precision reference applications where ±5% variants like the 1N5351B/TR8 would introduce unacceptable error margins.
Can the 1N5351C/TR8 be used in surface-mount designs?
No - the 1N5351C/TR8 uses an axial-leaded T-18 package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5351C series in DO-214AA (SMB) package. The 1N5351C/TR8 requires through-hole mounting with 3/8″ (10 mm) lead length from body for rated 5 W operation.
What is the maximum surge current rating for the 1N5351C/TR8?
The 1N5351C/TR8 has a maximum non-repetitive surge current (IZSM) of 6.7 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating enables reliable transient suppression in 12 V automotive and industrial systems, provided the device is mounted with adequate copper area to manage thermal stress during surge events.
How does the thermal resistance of the 1N5351C/TR8 affect its power dissipation?
The 1N5351C/TR8 has a junction-to-lead thermal resistance (RθJL) of 25 °C/W. At 25 °C lead temperature, it sustains 5 W continuously; above that, power must be linearly derated - e.g., 3.75 W at 43.75 °C lead temperature. Mounting on FR4 with 4 mm² copper pads raises RθJA to 85 °C/W, limiting ambient-rated power to ~1.47 W.
Is the 1N5351C/TR8 RoHS compliant?
Yes - the "e3" suffix in the full manufacturer designation confirms the 1N5351C/TR8 is RoHS compliant, with matte-tin-plated leads and halogen-free epoxy encapsulation meeting EU Directive 2011/65/EU. The TR8 tape-and-reel packaging format is also compatible with automated assembly processes requiring RoHS traceability.
1N5351C/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
1N5351C/TR8 FAQ
1.How can I place an order for 1N5351C/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5351C/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 1N5351C/TR8 reliable?
The price and inventory of 1N5351C/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5351C/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5351C/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5351C/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5351C/TR8?
1N5351C/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5351C/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 1N5351C/TR8?
For technical support, including 1N5351C/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5351C/TR8 requirements.
6.How does Aetrix verify that 1N5351C/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5351C/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 1N5351C/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5351C/TR8?
All 1N5351C/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5351C/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 1N5351C/TR8 part is unused and in its original packaging.
Return procedure for 1N5351C/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5351C/TR8 Tags
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