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Microchip Technology 1N5356AE3/TR8
- Part No.:
- 1N5356AE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5356AE3/TR8.pdf
- Description:
- DIODE ZENER 19V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,888
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Product details
Overview
1N5356AE3/TR8 from Microsemi is a 5 W axial-leaded Zener diode with nominal regulation voltage of 19 V, ±10% tolerance (A suffix), 65 mA test current (IZT), 3.0 Ω maximum dynamic impedance (ZZ), and 75 mA maximum regulator current (IZM). It operates across –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5356AE3/TR8 datasheet, 1N5356AE3/TR8 pinout, 1N5356AE3/TR8 application, or 1N5356AE3/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (520 A), voltage regulation (ΔVZ = 0.40 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage reference, operating in reverse breakdown with cathode-banded polarity. Its regulation performance is specified at 25 °C lead temperature (TL), with voltage measured 40 ±10 ms after DC current application and dynamic impedance derived from 1 kHz AC modulation at 10% of IZT.
Thermal design requires mounting with 3/8″ (10 mm) lead length from body for full 5 W dissipation; on FR4 PCB (1 oz Cu, 4 mm² pad), steady-state power drops to 1.47 W. It withstands 8.3 ms half-sine surge currents up to 520 A and exhibits ≤0.5 μA reverse leakage at VR = 14.4 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19 V ±10% - defines stable regulation point under specified IZT; high-end VZM = 20.9 V sets IZM limit. |
| Test Current (IZT) | 65 mA - operating point where VZ and ZZ are guaranteed; used for calibration and circuit biasing. |
| Dynamic Impedance (ZZ) | 3.0 Ω max - low impedance ensures minimal voltage shift under load transients; critical for feedback stability. |
| Max Regulator Current (IZM) | 75 mA - maximum continuous reverse current before thermal runaway; calculated as P/VZM = 5 W/20.9 V. |
| Surge Current (IZSM) | 520 A - peak non-repetitive 8.3 ms half-sine rating; enables transient overvoltage clamping without failure. |
| Voltage Regulation (ΔVZ) | 0.40 V - difference between VZ at 10% and 50% of IZM; quantifies regulation linearity across operating range. |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables 5 W operation with ≤125 °C junction rise above 25 °C lead temp. |
Pinout & Package
Package: Axial-leaded T-18 plastic case (Void-free UL94V-0 epoxy), cathode indicated by band. Leads are RoHS-compliant annealed matte-tin plated, solderable per MIL-STD-750 Method 2026. Weight: 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lower-potential rail; reverse-biased operation requires cathode at higher potential. |
| Cathode | Regulated output node | Banded end; supplies stable 19 V reference when reverse current flows; must be biased above anode by ≥VZ. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB series mechanical and electrical definitions for interchangeability. |
| 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 - no special ESD controls needed during board assembly. |
| High Surge Withstand | Rated for 520 A (8.3 ms half-sine) - protects downstream circuitry from lightning or inductive kick events. |
| RoHS Compliant (e3) | Matte-tin lead finish meets EU RoHS Directive 2011/65/EU - suitable for lead-free reflow processes. |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback converters via optocoupler-coupled feedback network. IC Role / Device Role / Timing Role: Primary-side voltage reference that sets regulation threshold for TL431 or similar shunt controller. Use Value: Tight ΔVZ (0.40 V) and low ZZ (3.0 Ω) minimize output drift across line/load variations and temperature. |
Use Scenario: Clamping transient spikes on 24 V industrial control rails exposed to relay switching or motor back-EMF. IC Role / Device Role / Timing Role: Two-terminal crowbar element absorbing energy during >30 V surges. Use Value: 520 A surge rating and 1.47 W PCB-mount power capability enable robust, single-component protection without external limiting resistors. |
| Programmable Reference Source | DC-DC Converter Trim Adjustment |
Use Scenario: Providing adjustable 19 V reference for DAC-controlled analog circuits requiring stable mid-rail bias. IC Role / Device Role / Timing Role: Precision Zener element in resistor-divider networks feeding op-amp inputs or ADC references. Use Value: ±10% VZ tolerance and <0.5 μA IR at 14.4 V ensure predictable divider ratio and minimal leakage error. |
Use Scenario: Fine-tuning output voltage of fixed 12 V DC-DC modules using external feedback resistor networks. IC Role / Device Role / Timing Role: Shunt reference establishing precise upper threshold for feedback node voltage division. Use Value: Low thermal resistance (25 °C/W) maintains regulation accuracy during sustained load conditions without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5356B | Same 19 V nominal VZ, but ±5% tolerance (B suffix) and 65 mA IZT; identical package and thermal specs. | Higher precision regulation required where tighter VZ tolerance reduces feedback loop gain variation. | Select 1N5356B when system-level voltage accuracy demands <±5% instead of ±10%. |
| MMBZ5242B (SOT-23) | Surface-mount 12 V Zener (not 19 V); 0.25 W rating; 10 Ω ZZ; 20 mA IZT; different package and power class. | Used in space-constrained low-power logic-level clamping, not 5 W power regulation. | Choose MMBZ5242B only for footprint-limited 12 V reference needs - not a functional replacement for 1N5356AE3/TR8. |
Compared with 1N5356B, the 1N5356AE3/TR8 trades voltage precision for cost and availability in tape-and-reel form, while MMBZ5242B serves entirely different power and packaging requirements - neither is pin-compatible nor functionally interchangeable with 1N5356AE3/TR8.
Availability
1N5356AE3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable reference designs requiring stable component supply, long-term obsolescence management, and RoHS-compliant procurement.
Supply support for 1N5356AE3/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, RF, and discrete components for aerospace, defense, and industrial markets.
The 1N53xx series was designed for ruggedized voltage regulation in harsh-environment power systems, emphasizing surge resilience, wide temperature operation, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5356AE3/TR8?
The 1N5356AE3/TR8 has a Zener voltage tolerance of ±10%, indicated by the "A" suffix in its part number. This means its regulated voltage falls between 17.1 V and 20.9 V at 65 mA test current and 25 °C lead temperature. The tolerance directly affects feedback accuracy in power supply designs and must be accounted for in worst-case circuit analysis.
Does the 1N5356AE3/TR8 require dry packing before PCB assembly?
No, the 1N5356AE3/TR8 has Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it does not absorb sufficient moisture during ambient storage to require dry packing or baking prior to reflow soldering. This simplifies manufacturing logistics and eliminates process steps associated with moisture-sensitive devices.
What is the maximum continuous power dissipation for the 1N5356AE3/TR8 on a standard FR4 PCB?
When mounted on a standard FR4 PCB (1 oz copper, 4 mm² pad, 1 mm track width, 25 mm length), the 1N5356AE3/TR8 has a steady-state power rating of 1.47 W at 25 °C ambient temperature. This is significantly lower than its 5 W rating at 25 °C lead temperature, due to higher junction-to-ambient thermal resistance (85 °C/W).
Can the 1N5356AE3/TR8 be used as a direct replacement for the 1N5356B?
The 1N5356AE3/TR8 is not a direct replacement for the 1N5356B in precision applications because it has ±10% voltage tolerance versus ±5% for the "B" version. While both share identical package, pinout, and thermal characteristics, the wider tolerance increases regulation uncertainty and may affect loop stability in tightly controlled feedback systems.
What does the "e3" and "TR8" suffix indicate in 1N5356AE3/TR8?
The "e3" suffix denotes RoHS-compliant matte-tin lead plating per EU Directive 2011/65/EU, suitable for lead-free reflow. The "TR8" indicates tape-and-reel packaging per EIA-296 standard, with 8 mm carrier tape and 1,000 units per reel - optimized for automated SMT placement despite being an axial-leaded device.
1N5356AE3/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):
- 19 V
- Tolerance:
- ±10%
- 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
1N5356AE3/TR8 FAQ
1.How can I place an order for 1N5356AE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5356AE3/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 1N5356AE3/TR8 reliable?
The price and inventory of 1N5356AE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5356AE3/TR8 is usually 5 days.
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Once your 1N5356AE3/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 1N5356AE3/TR8?
For technical support, including 1N5356AE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5356AE3/TR8 requirements.
6.How does Aetrix verify that 1N5356AE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5356AE3/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 1N5356AE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5356AE3/TR8?
All 1N5356AE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5356AE3/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 1N5356AE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5356AE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5356AE3/TR8 Tags
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