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Microchip Technology 1N5356E3/TR12
- Part No.:
- 1N5356E3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5356E3/TR12.pdf
- Description:
- DIODE ZENER 19V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,774
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Product details
Overview
1N5356E3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 19 V, ±5% tolerance (B-suffix equivalent), 65 mA test current, 3.0 Ω maximum dynamic impedance at IZT, and 75 mA maximum Zener current (IZM) when adequately heat-sunk. It regulates voltage in power supply feedback loops and overvoltage protection circuits across industrial and telecom systems.
For engineers reviewing the 1N5356E3/TR12 datasheet, 1N5356E3/TR12 pinout, 1N5356E3/TR12 application, or 1N5356E3/TR12 equivalent, key selection criteria include its 19 V Zener voltage, 5 W steady-state power rating at TL = 25°C, 25 °C/W junction-to-lead thermal resistance, 0.5 μA maximum reverse leakage at 14.4 V, and RoHS-compliant matte-tin plating.
Technical Context
This device operates as a two-terminal voltage reference in reverse-bias 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, with voltage regulation (ΔVZ) defined as the difference between voltages measured at 10% and 50% of IZM.
The 1N5356E3/TR12 exhibits low dynamic impedance (3.0 Ω) at 65 mA test current and maintains stable regulation across -65°C to +150°C operating temperature range. Its 25 °C/W thermal resistance enables high-current operation when mounted with ≥10 mm lead length from body, while moisture sensitivity level is IPC/JEDEC Level 1-no dry pack required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19 V nominal, ±5% tolerance - defines precise regulation point for feedback or clamping |
| Test Current (IZT) | 65 mA - operating point where VZ and ZZ are guaranteed per spec |
| Dynamic Impedance (ZZ) | 3.0 Ω max at IZT - ensures minimal voltage shift under load current variation |
| Max Reverse Leakage (IR) | 0.5 μA at 14.4 V - confirms low standby power loss in high-impedance bias networks |
| Max Zener Current (IZM) | 75 mA - maximum continuous DC current before exceeding 5 W power limit at TL = 25°C |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal design with standard axial-lead PCB mounting |
| Surge Current (IZSM) | 5.3 A peak (8.3 ms half-sine) - supports transient overvoltage suppression without failure |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), 0.7 g weight, cathode identified 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 | Reference node for reverse-bias operation | Connected to lower-potential side of regulated circuit; forms return path for Zener current |
| Cathode | Regulated output node | Banded end; held positive relative to anode to maintain reverse conduction; delivers stable 19 V reference |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB series mechanical and electrical definitions |
| RoHS-compliant construction | e3 suffix denotes lead-free matte-tin plating and halogen-free epoxy package |
| Level 1 moisture sensitivity | No dry pack or baking required prior to assembly-reduces manufacturing overhead |
| High surge withstand | 5.3 A non-recurrent surge rating enables robust overvoltage protection without external crowbar |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020-safe for handling in standard production environments |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp for Telecom Line Cards |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converter feedback loop via optocoupler interface. IC Role / Device Role / Timing Role: Precision 19 V reference source for TL431-like error amplifier biasing and threshold setting. Use Value: Maintains ±1% output regulation across line/load/temperature with 3.0 Ω dynamic impedance limiting feedback error. | Use Scenario: Clamps induced surges on -48 V DC distribution rails in central office equipment. IC Role / Device Role / Timing Role: Two-terminal shunt protector absorbing transient energy above 19 V threshold. Use Value: Withstands 5.3 A 8.3 ms surges without degradation, preserving downstream DC-DC converters. |
| Industrial Sensor Signal Conditioning | Programmable Logic Controller (PLC) Input Protection |
Use Scenario: Stabilizes excitation voltage for 4–20 mA current-loop pressure transmitters. IC Role / Device Role / Timing Role: Low-drift 19 V rail generator for precision op-amp biasing and ADC reference scaling. Use Value: Delivers <0.4 V regulation change (ΔVZ) from 7.5 mA to 37.5 mA, ensuring analog accuracy. | Use Scenario: Protects 24 V digital input channels against field-wiring transients and polarity reversal. IC Role / Device Role / Timing Role: Bidirectional clamp (with series diode) limiting input voltage to safe levels. Use Value: 0.5 μA leakage at 14.4 V prevents false triggering; 150°C max junction temp supports harsh cabinet environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5356B | Same 19 V, ±5%, 5 W rating but non-RoHS tin-lead plating; no TR12 tape-and-reel packaging | Not suitable for lead-free assembly; requires dry pack if stored >12 months | Select 1N5356B only for legacy reflow processes incompatible with matte-tin solderability |
| SMBJ5356B | Surface-mount SMB package; identical 19 V/±5%/5 W specs; 100 mW higher PD derating at TA | Requires PCB redesign; lacks axial leads for through-hole prototyping or high-vibration mounting | Choose SMBJ5356B when board space is constrained and automated SMT placement is available |
Compared with 1N5356B and SMBJ5356B, the 1N5356E3/TR12 uniquely combines RoHS compliance, tape-and-reel delivery (TR12), axial-leaded mechanical robustness, and JEDEC-standardized thermal performance-making it optimal for volume industrial production with mixed-technology assembly.
Availability
1N5356E3/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, telecom line card protection, and industrial sensor signal conditioning requiring stable component supply, long-lifecycle support, and RoHS-compliant procurement.
Supply support for 1N5356E3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized 5 W voltage regulation in harsh-environment power systems-emphasizing thermal stability, surge resilience, and long-term parametric consistency.
FAQ
What is the Zener voltage tolerance of the 1N5356E3/TR12?
The 1N5356E3/TR12 has a nominal Zener voltage of 19 V with ±5% tolerance, consistent with the B-suffix designation in the 1N53xxB family. This means the actual measured VZ falls between 18.05 V and 19.95 V at 65 mA test current and 25°C lead temperature. The e3 suffix does not affect voltage tolerance-it only indicates RoHS-compliant plating and packaging.
Can the 1N5356E3/TR12 be used without a heatsink?
Yes, the 1N5356E3/TR12 can operate at full 5 W dissipation without an external heatsink when lead temperature (TL) is maintained at ≤25°C-achieved using ≥10 mm lead length from the epoxy body. However, at ambient temperature (TA) on FR4 board, its steady-state power drops to 1.47 W; exceeding this requires thermal management or derating per Figure 1 in the datasheet.
What is the maximum reverse leakage current for the 1N5356E3/TR12?
The 1N5356E3/TR12 specifies a maximum reverse leakage current (IR) of 0.5 μA at 14.4 V (75% of VZ). This value is guaranteed across the full -65°C to +150°C operating temperature range and confirms minimal standby power loss in high-impedance bias networks or precision reference dividers.
Is the 1N5356E3/TR12 suitable for surge protection applications?
Yes-the 1N5356E3/TR12 is rated for 5.3 A peak non-recurrent surge current (IZSM) in an 8.3 ms half-sine waveform, making it suitable for clamping transient overvoltages in telecom, industrial, and automotive subsystems. Its low dynamic impedance (3.0 Ω) ensures rapid voltage stabilization during surge events without thermal runaway.
How does the e3 and TR12 suffix affect the 1N5356E3/TR12?
The e3 suffix denotes RoHS-compliant matte-tin plating and halogen-free epoxy packaging, while TR12 indicates tape-and-reel packaging per EIA-296 standard (12-inch reel). These suffixes do not alter electrical specifications-VZ, IZM, ZZ, and thermal ratings remain identical to the base 1N5356B part, enabling drop-in replacement in lead-free manufacturing lines.
1N5356E3/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):
- 19 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 3 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 13.7 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
1N5356E3/TR12 FAQ
1.How can I place an order for 1N5356E3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5356E3/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 1N5356E3/TR12 reliable?
The price and inventory of 1N5356E3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5356E3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5356E3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5356E3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5356E3/TR12?
1N5356E3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5356E3/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 1N5356E3/TR12?
For technical support, including 1N5356E3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5356E3/TR12 requirements.
6.How does Aetrix verify that 1N5356E3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5356E3/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 1N5356E3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5356E3/TR12?
All 1N5356E3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5356E3/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 1N5356E3/TR12 part is unused and in its original packaging.
Return procedure for 1N5356E3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5356E3/TR12 Tags
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