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Microchip Technology 1N5355AE3/TR12
- Part No.:
- 1N5355AE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5355AE3/TR12.pdf
- Description:
- DIODE ZENER 18V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,671
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Product details
Overview
1N5355AE3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 18 V, ±10% tolerance (A suffix), 65 mA test current (IZT), 2.5 Ω maximum dynamic impedance (ZZ), and 75 mA maximum Zener current (IZM) at 25°C lead temperature. It regulates voltage across industrial power supplies and voltage reference circuits where stable 18 V biasing is required.
For engineers reviewing the 1N5355AE3/TR12 datasheet, 1N5355AE3/TR12 pinout, 1N5355AE3/TR12 application, or 1N5355AE3/TR12 equivalent, key selection criteria include its 18 V Zener voltage, ±10% tolerance, 5 W steady-state power rating at TL < 25°C, 25 °C/W junction-to-lead thermal resistance, and RoHS-compliant matte-tin plating per MIL-STD-750 Method 2026.
Technical Context
This device operates as a voltage reference in reverse-biased mode, with cathode indicated by a band and requiring the banded end to be held positive relative to the anode. Its regulation performance is specified at 25°C lead temperature (TL), with voltage measured 40 ±10 ms after DC current application.
The 1N5355AE3/TR12 exhibits 0.40 V maximum voltage regulation (ΔVZ) between 10% and 50% of IZM, and 2.5 Ω maximum dynamic impedance at 65 mA test current. It withstands non-recurrent 8.3 ms half-sine surge currents up to 75 A and maintains ≤0.5 μA reverse leakage at 14.4 V (VR = 0.8 × VZ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V ±10% - precise 18 V regulation point for biasing and reference applications |
| Test Current (IZT) | 65 mA - operating current at which VZ is specified and dynamic impedance is measured |
| Max Dynamic Impedance (ZZ) | 2.5 Ω - low AC impedance ensures stable voltage under varying load conditions |
| Max Zener Current (IZM) | 75 mA - maximum continuous DC current at TL = 25°C with adequate heat sinking |
| Power Dissipation | 5.0 W at TL < 25°C (3/8″ lead length) - defines thermal design margin for PCB mounting |
| Thermal Resistance | 25 °C/W junction-to-lead - enables thermal modeling when mounted with 10 mm lead length |
| Reverse Leakage (IR) | ≤0.5 μA at VR = 14.4 V - ensures minimal standby current in high-impedance reference paths |
Pinout & Package
Package: Axial-leaded T-18 plastic case (Void-free transfer-molded thermosetting epoxy, UL94V-0 rated), 0.7 g weight, cathode identified by color band. Leads are RoHS-compliant annealed matte-tin plated 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–cathode |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to regulated 18 V node; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB series mechanical and electrical definitions |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - safe for standard handling without special ESD controls |
| High surge current capability | 75 A peak (8.3 ms half-sine) - supports transient overvoltage clamping in protection circuits |
| RoHS-compliant plating | e3 suffix indicates matte-tin termination - meets environmental compliance for modern PCB assembly |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Precision 18 V reference source for TL431 or optocoupler bias networks. Use Value: Maintains ±10% regulation over -65°C to +150°C ambient, enabling reliable feedback across wide temperature ranges. |
Use Scenario: Clamping transient spikes on 24 V rail inputs subjected to load dump or inductive kickback. IC Role / Device Role / Timing Role: Shunt protection element diverting excess energy to ground before downstream ICs are damaged. Use Value: Withstands 75 A surge (8.3 ms) and exhibits only 0.40 V ΔVZ - limits clamped voltage to ≤18.4 V during transients. |
| Programmable Voltage Monitor Threshold | Analog Sensor Biasing Circuit |
Use Scenario: Setting trip point for comparator-based undervoltage lockout (UVLO) in battery-powered equipment. IC Role / Device Role / Timing Role: Stable 18 V reference feeding comparator input to detect supply sag below threshold. Use Value: Low 2.5 Ω ZZ minimizes voltage shift under sensing current variations, improving UVLO accuracy. |
Use Scenario: Providing excitation voltage to resistive temperature detectors (RTDs) or strain gauges in measurement front-ends. IC Role / Device Role / Timing Role: Low-noise, stable bias source ensuring consistent sensor bridge excitation. Use Value: ≤0.5 μA IR at 14.4 V prevents loading errors in high-impedance sensor interfaces. |
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 VZ, but ±5% tolerance (B suffix) vs. ±10% (A suffix); identical package, thermal, and surge specs | Higher precision regulation required where tighter voltage stability is critical | Select 1N5355B when ±5% tolerance is needed; 1N5355AE3/TR12 suits cost-sensitive designs accepting ±10% |
| MMBZ5245BS-7-F | Surface-mount SOD-123 package, 18 V VZ, ±5%, 225 mW power - not a direct replacement due to power and package mismatch | Space-constrained PCBs where axial leads are impractical and lower power suffices | Choose MMBZ5245BS-7-F only for low-power signal-level references; 1N5355AE3/TR12 remains necessary for 5 W dissipation |
Compared with 1N5355B and MMBZ5245BS-7-F, the 1N5355AE3/TR12 uniquely delivers 5 W axial-leaded Zener regulation at 18 V with ±10% tolerance and RoHS-compliant tape-and-reel packaging - making it optimal for industrial power rails requiring robust, through-hole mounted voltage control.
Availability
1N5355AE3/TR12 is available at Aetrix Electronics and suitable for industrial power supply reference, overvoltage protection clamp, and programmable voltage monitor threshold applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5355AE3/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 1N53xx series was designed specifically for ruggedized 5 W axial Zener regulation in harsh-environment power systems - emphasizing thermal robustness, surge resilience, and JEDEC-standard mechanical compatibility.
FAQ
What is the Zener voltage tolerance of the 1N5355AE3/TR12?
The 1N5355AE3/TR12 has a Zener voltage tolerance of ±10%, indicated by the "A" suffix in its part number. This means its actual regulation voltage falls within 16.2 V to 19.8 V at 65 mA test current and 25°C lead temperature, as confirmed in the Microsemi 1N5333B–1N5388B datasheet Rev D.
Does the 1N5355AE3/TR12 require dry packing or baking before PCB assembly?
No, the 1N5355AE3/TR12 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it is not moisture-sensitive and requires no dry pack or pre-assembly baking. This simplifies manufacturing flow and reduces handling risk compared to higher-MSL components.
What is the maximum surge current rating for the 1N5355AE3/TR12?
The 1N5355AE3/TR12 is rated for a maximum non-recurrent surge current (IZSM) of 75 A, defined as the peak of an 8.3 ms half-sine waveform. This rating is validated per Microsemi's test methodology and supports use in transient voltage suppression applications.
How does the thermal resistance of the 1N5355AE3/TR12 affect PCB layout?
The 1N5355AE3/TR12 has a junction-to-lead thermal resistance of 25 °C/W when leads are trimmed to 3/8″ (10 mm) from the body. To maintain 5 W power dissipation, PCB layout must ensure adequate copper area and lead length - otherwise derating applies, e.g., to 1.47 W on FR4 with 4 mm² pads.
Is the 1N5355AE3/TR12 compatible with lead-free reflow soldering processes?
Yes, the 1N5355AE3/TR12 features RoHS-compliant matte-tin plating qualified for soldering at 260°C for 10 seconds maximum, fully supporting lead-free reflow profiles. Its UL94V-0 epoxy body also withstands standard reflow thermal cycles without degradation.
1N5355AE3/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:
- ±10%
- 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
1N5355AE3/TR12 FAQ
1.How can I place an order for 1N5355AE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5355AE3/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 1N5355AE3/TR12 reliable?
The price and inventory of 1N5355AE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5355AE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5355AE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5355AE3/TR12 transactions.
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4.How is shipping managed for 1N5355AE3/TR12?
1N5355AE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5355AE3/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 1N5355AE3/TR12?
For technical support, including 1N5355AE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5355AE3/TR12 requirements.
6.How does Aetrix verify that 1N5355AE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5355AE3/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 1N5355AE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5355AE3/TR12?
All 1N5355AE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5355AE3/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 1N5355AE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5355AE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5355AE3/TR12 Tags
-
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
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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