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Microchip Technology 1N5355E3/TR13
- Part No.:
- 1N5355E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5355E3/TR13.pdf
- Description:
- DIODE ZENER 18V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,300
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Product details
Overview
1N5355E3/TR13 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 18 V, ±5% tolerance (B-suffix equivalent), 65 mA test current (IZT), 2.5 Ω dynamic impedance (ZZ), and 75 mA maximum Zener current (IZM) at TL = 25°C. It regulates voltage in power supply feedback loops, overvoltage protection circuits, and reference voltage sources across industrial and telecom systems.
For engineers reviewing the 1N5355E3/TR13 datasheet, 1N5355E3/TR13 pinout, 1N5355E3/TR13 application, or 1N5355E3/TR13 equivalent, key selection criteria include its 18 V Zener voltage, 5 W steady-state power rating at lead temperature, ±5% tolerance, low 2.5 Ω dynamic impedance at IZT, and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device operates as a reverse-biased voltage reference with stable regulation over 10–50% of IZM (7.5–37.5 mA), exhibiting ΔVZ ≤ 0.40 V between those points. Its thermal resistance is 25 °C/W junction-to-lead at 10 mm lead length, enabling reliable 5 W dissipation with minimal heatsinking.
The 1N5355E3/TR13 features cathode band polarity marking, UL94V-0 void-free epoxy encapsulation, and moisture sensitivity level 1-no dry pack required. It withstands 8.3 ms half-sine surge currents up to 75 A and maintains <0.5 μA reverse leakage at VR = 14.4 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V nominal, ±5% tolerance - defines precise regulation point for feedback or clamping |
| Test Current (IZT) | 65 mA - operating point where VZ and ZZ are specified; used for calibration and stability verification |
| Dynamic Impedance (ZZ) | 2.5 Ω - low AC resistance ensures minimal voltage shift under varying load current |
| Max Zener Current (IZM) | 75 mA - maximum DC current at TL = 25°C; determines safe continuous power limit (5 W) |
| Power Dissipation | 5.0 W at TL < 25°C (3/8″ lead length) - sets thermal design baseline for PCB layout and heatsinking |
| Reverse Leakage (IR) | ≤0.5 μA at VR = 14.4 V - ensures negligible standby current in high-impedance bias networks |
| Voltage Regulation (ΔVZ) | ≤0.40 V - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC DO-204AL), 0.7 g weight, cathode indicated by color band. Leads are RoHS-compliant annealed matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse voltage applied across anode-to-cathode |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to regulated node or error amplifier input; must be at higher potential than anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions, electrical behavior, and cross-manufacturer interchangeability |
| RoHS-compliant e3 suffix | Meets EU Directive 2011/65/EU; matte-tin plating eliminates lead-based solder compatibility concerns |
| Tape-and-reel TR13 packaging | Standard EIA-296 compliant format supporting automated SMT placement despite axial form factor |
| Moisture Sensitivity Level 1 | No dry pack or baking required before assembly-reduces handling cost and process risk |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands human-body-model ESD events without parameter shift-simplifies handling in non-EPA environments |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated 48 V DC-DC converter to regulate output within ±1%. IC Role / Device Role / Timing Role: Zener reference providing stable 18 V threshold to drive optocoupler LED, enabling precise secondary-side voltage sensing. Use Value: Low 2.5 Ω dynamic impedance minimizes output voltage drift across 10–50% load steps; ±5% tolerance ensures consistent regulation setpoint across production lots. | Use Scenario: Placed across 24 V rail in industrial PLC I/O module to suppress transients exceeding 30 V. IC Role / Device Role / Timing Role: Shunt clamp absorbing surge energy during inductive kickback or lightning-induced spikes. Use Value: 75 A peak surge rating (8.3 ms half-sine) and 5 W steady-state dissipation enable robust protection without crowbar circuitry. |
| Programmable Voltage Reference | Temperature-Stable Bias Network |
Use Scenario: Paired with precision resistor divider in analog sensor signal conditioning stage for 18 V reference generation. IC Role / Device Role / Timing Role: Primary voltage reference element establishing fixed bias point for op-amp input stages. Use Value: ΔVZ ≤ 0.40 V ensures <2.2% regulation error across operating current range-critical for 12-bit ADC accuracy. | Use Scenario: Biasing base of PNP transistor in thermally compensated current source for LED driver. IC Role / Device Role / Timing Role: Stable reference node compensating for VBE drift across –40°C to +85°C ambient. Use Value: Low thermal resistance (25 °C/W) and wide operating range (–65°C to +150°C) maintain regulation stability under thermal stress. |
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, ±5%, 5 W rating but leaded bulk packaging (no TR13 tape/reel); non-RoHS tin-lead plating | Suitable for manual assembly or non-RoHS-compliant legacy designs; lacks EIA-296 automation support | Select when RoHS compliance or automated placement is not required and cost-per-unit is prioritized |
| MMSZ5245B-TP | Surface-mount SOD-123 package; same 18 V, ±5%, but lower 500 mW power rating and 30 Ω ZZ | Used in space-constrained, low-power applications; unsuitable for >100 mA continuous regulation | Select only for compact PCBs with low-current (<50 mA) reference needs; not a drop-in replacement |
Compared with 1N5355B and MMSZ5245B-TP, the 1N5355E3/TR13 uniquely combines RoHS compliance, tape-and-reel automation readiness, 5 W power capability, and low dynamic impedance-making it optimal for high-reliability, medium-power industrial power supplies requiring long-term supply continuity.
Availability
1N5355E3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable voltage references requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.
Supply support for 1N5355E3/TR13 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 timing solutions 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, surge immunity, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5355E3/TR13?
The 1N5355E3/TR13 has a nominal Zener voltage of 18 V with ±5% tolerance, confirmed by the "B"-equivalent specification in Microsemi's 1N5333B–1N5388B datasheet and the e3 RoHS suffix applied to the standard B-tolerance variant. This tolerance ensures regulation remains within 17.1–18.9 V at IZT = 65 mA and TL = 25°C.
Does the 1N5355E3/TR13 require dry packing before PCB assembly?
No, the 1N5355E3/TR13 does not require dry packing. Its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1, meaning it may be stored and assembled indefinitely at ambient conditions without baking or humidity-controlled handling-reducing manufacturing overhead and floor-stock risk.
What is the maximum surge current rating for the 1N5355E3/TR13?
The 1N5355E3/TR13 is rated for a maximum non-recurrent surge current (IZSM) of 75 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating is validated per Microsemi's datasheet and enables reliable transient suppression in industrial power rails without external TVS devices.
Can the 1N5355E3/TR13 be used in surface-mount designs?
No-the 1N5355E3/TR13 uses axial-leaded T-18 (DO-204AL) packaging and is not a surface-mount device. For SMT equivalents, Microsemi offers the SMBJ5355B or SMBG5355B in SMB/SMBG packages; the 1N5355E3/TR13 requires through-hole or axial mounting with ≥10 mm lead length for full 5 W rating.
What is the thermal resistance specification for the 1N5355E3/TR13?
The 1N5355E3/TR13 has a junction-to-lead thermal resistance of 25 °C/W when measured at 3/8″ (10 mm) lead length from the body. When mounted on FR4 with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm traces, its junction-to-ambient resistance rises to 85 °C/W-critical for derating calculations per Figure 1 in the datasheet.
1N5355E3/TR13 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:
- ±20%
- 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
1N5355E3/TR13 FAQ
1.How can I place an order for 1N5355E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5355E3/TR13 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 1N5355E3/TR13 reliable?
The price and inventory of 1N5355E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5355E3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5355E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5355E3/TR13 transactions.
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4.How is shipping managed for 1N5355E3/TR13?
1N5355E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5355E3/TR13 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 1N5355E3/TR13?
For technical support, including 1N5355E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5355E3/TR13 requirements.
6.How does Aetrix verify that 1N5355E3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5355E3/TR13 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 1N5355E3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5355E3/TR13?
All 1N5355E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5355E3/TR13, 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 1N5355E3/TR13 part is unused and in its original packaging.
Return procedure for 1N5355E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5355E3/TR13 Tags
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