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Microchip Technology 1N5355CE3/TR8
- Part No.:
- 1N5355CE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5355CE3/TR8.pdf
- Description:
- DIODE ZENER 18V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,833
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Product details
Overview
1N5355CE3/TR8 from Microsemi is a 5 W, 18 V ±2% tolerance axial-leaded silicon Zener diode designed for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation. It operates across –65°C to +150°C, delivers 65 mA maximum Zener current (IZM), and exhibits 2.5 Ω dynamic impedance (ZZ) at 65 mA test current.
For engineers reviewing the 1N5355CE3/TR8 datasheet, 1N5355CE3/TR8 pinout, 1N5355CE3/TR8 application, or 1N5355CE3/TR8 equivalent, key selection criteria include its tight ±2% voltage tolerance (C suffix), RoHS-compliant matte-tin plating (e3), tape-and-reel packaging (TR8), and verified 260°C solderability per MIL-STD-750.
Technical Context
This Zener diode functions as a two-terminal shunt regulator, maintaining stable 18 V output by conducting reverse current above its breakdown threshold. Its low 2.5 Ω dynamic impedance ensures minimal voltage variation under load changes, while its 25 °C/W junction-to-lead thermal resistance enables reliable 5 W operation with 3/8″ lead length heat sinking.
The device features a void-free UL94V-0 epoxy case, cathode band polarity marking, and moisture sensitivity level 1 per J-STD-020B-eliminating dry-pack requirements. It withstands 8.3 ms non-recurrent surge currents up to 75 A and exhibits ≤0.40 V voltage regulation (ΔVZ) between 10% and 50% of IZM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V ±2% - precise regulation setpoint for feedback or clamping at nominal operating current |
| Power Dissipation (Pd) | 5.0 W at TL = 25°C - supports high-stability regulation in thermally managed linear supplies |
| Test Current (IZT) | 65 mA - defined operating point where VZ and ZZ are guaranteed per JEDEC spec |
| Dynamic Impedance (ZZ) | 2.5 Ω max @ IZT - low AC resistance minimizes output voltage ripple under varying load |
| Max Reverse Current (IR) | 0.5 μA @ 14.4 V - ensures negligible leakage below regulation threshold |
| Surge Current (IZSM) | 75 A peak (8.3 ms half-sine) - robust transient suppression capability without failure |
| Voltage Regulation (ΔVZ) | 0.40 V max - difference between VZ measured at 10% and 50% of IZM reflects regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC DO-204AL), void-free UL94V-0 epoxy body, tin-lead or RoHS-compliant matte-tin plated leads, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to circuit ground or lower potential node in shunt regulation configuration |
| Cathode | Zener breakdown terminal | Banded end; connected to regulated voltage node-reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables tighter output regulation without external trimming in mid-precision power supplies |
| RoHS-compliant matte-tin plating (e3) | Ensures lead-free assembly compatibility and solderability up to 260°C for 10 s |
| Tape-and-reel packaging (TR8) | Supports automated SMT placement despite axial form factor via carrier tape handling |
| Moisture Sensitivity Level 1 | Eliminates baking or dry-pack requirements-reduces manufacturing overhead and shelf-life risk |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-protected workstations |
Applications
| Switching Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in flyback or forward converter feedback networks using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Shunt reference providing stable 18 V reference to TL431 or similar error amplifier input. Use Value: ±2% tolerance ensures <±1% output voltage drift across line/load/temperature-meeting industrial PSU specs. |
Use Scenario: Clamps transient spikes on 15–24 V DC rails caused by inductive switching or ESD events. IC Role / Device Role / Timing Role: Two-terminal passive clamp absorbing energy above 18 V threshold until crowbar or shutdown activates. Use Value: 75 A surge rating and 0.40 V ΔVZ allow fast, repeatable clamping without degradation after multiple transients. |
| Programmable Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Provides stable excitation voltage for precision resistive sensors (e.g., RTDs, strain gauges) in 4–20 mA transmitter front-ends. IC Role / Device Role / Timing Role: Low-drift, low-noise Zener reference replacing higher-cost IC references where 0.5% absolute accuracy suffices. Use Value: 2.5 Ω ZZ and –65°C to +150°C operation enable stable biasing across wide ambient ranges without active compensation. |
Use Scenario: Supplies constant 18 V bias to analog sensor signal chains in PLC I/O modules exposed to harsh factory environments. IC Role / Device Role / Timing Role: Primary voltage stabilization element in unregulated 24 VDC input conditioning stage before LDO or op-amp stages. Use Value: UL94V-0 case and MIL-STD-750 qualified plating ensure reliability in vibration-prone, high-humidity industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5355B | Same 18 V nominal, but ±5% tolerance (B suffix) and no e3 RoHS marking | Acceptable where cost sensitivity outweighs precision or lead-free compliance | Select only if legacy design requires non-RoHS parts or ±5% regulation is sufficient |
| MMSZ5245E | Surface-mount SOD-123 package, 18 V ±5%, 500 mW rating, 30 Ω ZZ | Limited to low-power applications; unsuitable for 5 W continuous dissipation | Use only for space-constrained PCBs where power demand is <0.5 W and thermal mass is limited |
Compared with 1N5355B and MMSZ5245E, the 1N5355CE3/TR8 uniquely combines ±2% tolerance, 5 W power handling, RoHS compliance, and axial-leaded tape-and-reel delivery-making it optimal for industrial-grade linear regulators and ruggedized protection circuits requiring long-term calibration stability.
Availability
1N5355CE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and programmable voltage reference designs requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for 1N5355CE3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was engineered for ruggedized voltage regulation in mission-critical power systems-emphasizing wide temperature operation, surge resilience, and JEDEC-standardized performance across military and commercial grades.
FAQ
What is the Zener voltage tolerance of the 1N5355CE3/TR8?
The 1N5355CE3/TR8 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its actual breakdown voltage falls within 17.64 V to 18.36 V at 65 mA test current and 25°C lead temperature. This tighter tolerance supports higher-accuracy regulation than standard ±5% (B suffix) or ±10% (A suffix) variants, making the 1N5355CE3/TR8 suitable for applications demanding stable reference voltages without post-production trimming.
Does the 1N5355CE3/TR8 require dry packing before reflow soldering?
No, the 1N5355CE3/TR8 does not require dry packing. It carries Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it is not moisture-sensitive and may be stored indefinitely at ambient conditions without baking. This eliminates pre-reflow desiccation steps and reduces handling complexity in manufacturing-confirmed by Microsemi's official documentation and package qualification data.
What is the maximum steady-state power dissipation of the 1N5355CE3/TR8 on a standard FR4 PCB?
The 1N5355CE3/TR8 dissipates up to 1.47 W continuously when mounted on a standard FR4 PCB (1 oz copper) with 4 mm² copper pads and 1 mm track width over 25 mm length. This value derives from its 85°C/W junction-to-ambient thermal resistance under those specific board conditions. For full 5 W operation, the datasheet mandates heat sinking at the leads-specifically 3/8″ (10 mm) lead length from the body at TL = 25°C.
How is polarity marked on the 1N5355CE3/TR8?
The 1N5355CE3/TR8 uses a cathode band marking: a single colored band near one end of the axial package identifies the cathode terminal. During normal Zener operation, this banded end must be held at a more positive potential than the anode-i.e., the diode is reverse-biased. Forward conduction occurs when the anode is positive relative to the cathode, with VF ≤ 1.2 V at 1.0 A, per the datasheet's maximum ratings table.
What does the "TR8" suffix indicate in 1N5355CE3/TR8?
The "TR8" suffix in 1N5355CE3/TR8 indicates tape-and-reel packaging compliant with EIA-296 standards, with 8 mm tape width. This format enables automated pick-and-place assembly for axial components, supporting high-volume manufacturing. The "e3" prefix confirms RoHS compliance (matte-tin plating), while "C" specifies ±2% Zener voltage tolerance-making the full designation fully traceable to Microsemi's published ordering matrix and packaging options.
1N5355CE3/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):
- 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/TR8 FAQ
1.How can I place an order for 1N5355CE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5355CE3/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 1N5355CE3/TR8 reliable?
The price and inventory of 1N5355CE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5355CE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5355CE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5355CE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5355CE3/TR8?
1N5355CE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5355CE3/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 1N5355CE3/TR8?
For technical support, including 1N5355CE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5355CE3/TR8 requirements.
6.How does Aetrix verify that 1N5355CE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5355CE3/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 1N5355CE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5355CE3/TR8?
All 1N5355CE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5355CE3/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 1N5355CE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5355CE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5355CE3/TR8 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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SMAZ12-13-F
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