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Microchip Technology 1N5355CE3/TR12
- Part No.:
- 1N5355CE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5355CE3/TR12.pdf
- Description:
- DIODE ZENER 18V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,524
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Product details
Overview
1N5355CE3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 18 V, ±2% tolerance (C suffix), 65 mA test current (IZT), 2.5 Ω dynamic impedance (ZZ), and 75 mA maximum Zener current (IZM) at 25°C lead temperature. It regulates voltage in power supply feedback loops and overvoltage protection circuits across industrial and telecom systems.
For engineers reviewing the 1N5355CE3/TR12 datasheet, 1N5355CE3/TR12 pinout, 1N5355CE3/TR12 application, or 1N5355CE3/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (75 A), voltage regulation (ΔVZ = 0.40 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device operates as a precision voltage reference in shunt-regulator configurations, maintaining stable output under varying load and line conditions. Its low dynamic impedance (2.5 Ω) and tight ±2% voltage tolerance ensure minimal deviation across its 10–50% IZM operating range.
The 1N5355CE3/TR12 features a void-free thermosetting epoxy T-18 package rated for -65°C to +150°C operation, with cathode indicated by band and polarity requiring banded end to be positive relative to the anode. Thermal performance is specified at 3/8" (10 mm) lead length from body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V ±2% - precise reference for feedback networks requiring stable 18 V regulation |
| Test Current (IZT) | 65 mA - operating point where VZ and ZZ are guaranteed per JEDEC spec |
| Dynamic Impedance (ZZ) | 2.5 Ω - low AC resistance ensures minimal voltage shift under load transients |
| Max Zener Current (IZM) | 75 mA - maximum continuous DC current at TL = 25°C with adequate heat sinking |
| Voltage Regulation (ΔVZ) | 0.40 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Surge Current (IZSM) | 75 A - peak non-repetitive half-sine (8.3 ms) capability for transient suppression |
| Thermal Resistance (RθJL) | 25 °C/W - junction-to-lead value enables thermal design with standard axial-lead mounting |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC TO-204-AC, void-free UL94V-0 epoxy body, tin-lead or RoHS-compliant matte-tin plating, cathode identified by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or low-side reference in shunt regulator | Terminal where conventional current enters during reverse breakdown; must be held at lower potential than cathode |
| Cathode | Current exit terminal in reverse breakdown; connected to regulated rail or feedback node | Banded end; held at higher potential to enable Zener conduction; defines regulated output voltage reference point |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables high-accuracy feedback without external trimming in 18 V power supplies |
| RoHS-compliant e3 suffix | Meets EU Directive 2011/65/EU with matte-tin plating, no lead exemption required |
| JEDEC-registered 1N53xxB series | Guarantees mechanical and electrical interchangeability across qualified suppliers |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and floor-life constraints for SMT-compatible handling |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands human-body-model discharges without parameter shift or failure |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter secondary-side feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing error signal to optocoupler input. Use Value: Tight ±2% VZ tolerance maintains output accuracy within ±1% over line/load/temperature in 18 V output designs. | Use Scenario: Clamps transient overvoltage on 15–20 V DC rails in industrial control modules. IC Role / Device Role / Timing Role: Passive crowbar element conducting only above 18 V threshold. Use Value: 75 A surge rating absorbs 8.3 ms transients per IEEE C37.90.1 without degradation. |
| Programmable Voltage Reference | DC-DC Converter Output Trim |
Use Scenario: Sets reference voltage for adjustable linear regulators (e.g., LM317) in lab equipment. IC Role / Device Role / Timing Role: Precision Zener defining VREF node in resistor-divider network. Use Value: 2.5 Ω dynamic impedance minimizes loading error when sourcing <1 mA into divider. | Use Scenario: Fine-tunes output voltage of fixed-output DC-DC modules via feedback pin injection. IC Role / Device Role / Timing Role: Low-current shunt regulator injecting correction current into FB node. Use Value: 0.40 V ΔVZ ensures predictable trim range without oscillation or instability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5355B | Same 18 V nominal VZ but ±5% tolerance (B suffix); identical IZT, ZZ, IZM, and package | Acceptable where ±5% regulation accuracy suffices; lower cost due to relaxed tolerance | Select 1N5355B for cost-sensitive industrial power supplies where tighter tolerance is unnecessary |
| SMBJ5355CE3 | Surface-mount SMB package; same 18 V ±2%, 65 mA IZT, 2.5 Ω ZZ, but lower IZM (65 mA) and higher RθJA (85 °C/W) | Used in space-constrained PCBs; requires thermal pad design for equivalent power handling | Select SMBJ5355CE3 only when board area is critical and thermal management supports reduced IZM |
Compared with 1N5355B and SMBJ5355CE3, the 1N5355CE3/TR12 delivers superior voltage accuracy (±2% vs. ±5%) and higher continuous current capability (75 mA vs. 65 mA in SMB), making it optimal for precision 18 V regulation where axial-lead mounting and thermal performance are prioritized.
Availability
1N5355CE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, telecom rectifier modules, and test equipment requiring stable component supply, consistent Zener voltage tolerance, and RoHS-compliant packaging.
Supply support for 1N5355CE3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed for robust, high-power voltage regulation in harsh-environment power systems, emphasizing thermal stability, surge resilience, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5355CE3/TR12?
The 1N5355CE3/TR12 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its regulated voltage falls within 17.64 V to 18.36 V at 65 mA test current and 25°C lead temperature, enabling high-accuracy feedback in precision power supplies.
What does the "e3" and "TR12" suffix indicate in 1N5355CE3/TR12?
The "e3" suffix confirms RoHS compliance with matte-tin plating per MIL-STD-750, while "TR12" indicates tape-and-reel packaging per EIA-296 standard, containing 1,200 units per reel. Both suffixes are integral to the full orderable part number 1N5355CE3/TR12.
Can the 1N5355CE3/TR12 replace the 1N5355B in existing designs?
Yes, the 1N5355CE3/TR12 is mechanically and electrically compatible with the 1N5355B, sharing identical T-18 package, pinout, thermal resistance, and Zener voltage nominal value. The only functional difference is tighter ±2% tolerance versus ±5%, which improves regulation accuracy without requiring layout changes.
What is the maximum power dissipation of the 1N5355CE3/TR12 at 25°C?
The 1N5355CE3/TR12 is rated for 5.0 watts steady-state power dissipation at 25°C lead temperature (TL), with derating to 1.47 W at 25°C ambient when mounted on FR4 with specified copper pads. This rating assumes proper heat sinking at the leads per Microsemi's thermal resistance specification of 25 °C/W junction-to-lead.
How is polarity marked on the 1N5355CE3/TR12?
The 1N5355CE3/TR12 uses a cathode band to indicate polarity: the banded end is the cathode and must be held at a higher potential than the anode to achieve Zener breakdown. In circuit operation, the cathode connects to the regulated voltage rail or feedback node, while the anode connects to ground or the lower-potential reference point.
1N5355CE3/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):
- 18 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 13 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
1N5355CE3/TR12 FAQ
1.How can I place an order for 1N5355CE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5355CE3/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 1N5355CE3/TR12 reliable?
The price and inventory of 1N5355CE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5355CE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5355CE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5355CE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5355CE3/TR12?
1N5355CE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5355CE3/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 1N5355CE3/TR12?
For technical support, including 1N5355CE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5355CE3/TR12 requirements.
6.How does Aetrix verify that 1N5355CE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5355CE3/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 1N5355CE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5355CE3/TR12?
All 1N5355CE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5355CE3/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 1N5355CE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5355CE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5355CE3/TR12 Tags
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