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Microchip Technology 1N5356C/TR8
- Part No.:
- 1N5356C/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5356C/TR8.pdf
- Description:
- DIODE ZENER 19V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:7,366
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Product details
Overview
1N5356C/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 19 V, ±2% tolerance (C suffix), 65 mA test current (IZT), 3.0 Ω maximum dynamic impedance (ZZ), and 75 mA maximum Zener current (IZM) at 25°C lead temperature. It operates from -65°C to +150°C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5356C/TR8 datasheet, 1N5356C/TR8 pinout, 1N5356C/TR8 application, or 1N5356C/TR8 equivalent, key selection criteria include its tight ±2% voltage tolerance, low 3.0 Ω dynamic impedance at 65 mA, 75 mA IZM rating with adequate heat sinking, and RoHS-compliant e3 marking with TR8 tape-and-reel packaging.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-bias mode, where the cathode band denotes the positive terminal during regulation. Its Zener voltage is specified at 25°C lead temperature with 40±10 ms DC measurement delay, and its dynamic impedance is measured using 1 kHz AC modulation at 10% of IZT.
Thermal performance is defined by 25°C/W junction-to-lead resistance at 3/8" (10 mm) lead length, enabling stable 5 W operation when mounted with proper heat sinking; derating begins above 25°C lead temperature per Figure 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19 V ±2% - precise regulation point for feedback networks requiring tight voltage stability |
| Test Current (IZT) | 65 mA - operating point at which VZ and ZZ are guaranteed per JEDEC spec |
| Dynamic Impedance (ZZ) | 3.0 Ω max - low AC resistance ensures minimal output voltage variation under load transients |
| Max Zener Current (IZM) | 75 mA - maximum continuous DC current at TL = 25°C with appropriate heat sinking |
| Power Dissipation | 5.0 W at TL < 25°C - full-rated power achievable only with controlled lead temperature |
| Operating Temperature | -65°C to +150°C - suitable for industrial and aerospace environments with wide thermal excursions |
| Reverse Leakage (IR) | 0.5 μA max at VR = 14.4 V - negligible standby current in high-impedance bias networks |
Pinout & Package
Package: Axial-leaded T-18 plastic case (Void-free transfer-molded thermosetting epoxy, UL94V-0 rated); cathode indicated by color band; leads plated with annealed matte tin (RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased operation requires this terminal to be at lower potential than cathode |
| Cathode | Regulated output node | Banded end; held at stable 19 V relative to anode when reverse current ≥ IZT and ≤ IZM |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables accurate voltage references without post-calibration in analog power control circuits |
| Low 3.0 Ω dynamic impedance | Minimizes output voltage deviation under varying load currents in feedback paths |
| JEDEC 1N53xxB-series compliance | Ensures mechanical and electrical interchangeability with legacy 5 W Zener designs |
| e3 RoHS-compliant marking | Confirms lead-free plating and halogen-free packaging for modern environmental compliance |
| Tape-and-reel (TR8) packaging | Supports automated SMT placement despite axial form factor via carrier tape orientation |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Primary-side Zener reference establishing precise 19 V threshold for TL431-like shunt regulator operation. Use Value: ±2% tolerance and 3.0 Ω ZZ maintain <1% output error across line/load variations without trimming. | Use Scenario: Providing stable excitation voltage for bridge-based pressure transducers in factory automation systems. IC Role / Device Role / Timing Role: Two-terminal voltage reference supplying constant 19 V bias to Wheatstone bridge elements. Use Value: Low IR (0.5 μA) prevents loading errors; -65°C to +150°C range supports unheated outdoor enclosures. |
| Overvoltage Clamp Protection | Programmable Threshold Detector |
Use Scenario: Safeguarding microcontroller I/O pins against transient surges on 12–24 V industrial buses. IC Role / Device Role / Timing Role: Shunt clamp activated above 19 V to divert excess energy to ground before IC damage occurs. Use Value: 75 mA IZM and 20 A surge rating (IZSM) absorb repetitive 8.3 ms transients without degradation. | Use Scenario: Setting trip point for comparator-based battery charge termination at 19 V in 16-cell Li-ion packs. IC Role / Device Role / Timing Role: Precision voltage threshold element defining comparator reference input level. Use Value: Tight 19 V ±2% tolerance eliminates need for external resistor divider calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5356B/TR8 | ±5% tolerance (B suffix), same VZ nominal, identical package and IZT/IZM ratings | Acceptable where ±5% regulation accuracy suffices; lower cost due to relaxed tolerance | Select when system-level calibration compensates for wider voltage spread |
| MMSZ5247ET1G | Surface-mount SOD-123, 500 mW rating, 19 V ±5%, 30 Ω ZZ, 65 mA IZM | Not drop-in; requires PCB redesign; suited for space-constrained consumer electronics | Choose only if board area is critical and thermal management allows lower power dissipation |
Compared with 1N5356B/TR8, the 1N5356C/TR8 delivers tighter voltage control essential for uncalibrated analog circuits; versus MMSZ5247ET1G, it provides 10× higher power handling and superior thermal robustness in industrial mounting configurations.
Availability
1N5356C/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, overvoltage protection circuits, and programmable threshold detectors requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for 1N5356C/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xx series was designed as a JEDEC-standardized family of 5 W axial Zener diodes to replace older 1N47xx devices with improved thermal resistance, tighter tolerances, and enhanced surge capability for ruggedized power regulation.
FAQ
What is the Zener voltage tolerance of the 1N5356C/TR8?
The 1N5356C/TR8 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its regulated voltage falls within 18.62 V to 19.38 V at 25°C lead temperature and 65 mA test current. This tight tolerance enables use in precision reference applications without additional calibration, distinguishing it from ±5% (B suffix) or ±10% (A suffix) variants in the same 1N53xx family.
How much power can the 1N5356C/TR8 dissipate continuously?
The 1N5356C/TR8 is rated for 5.0 W continuous power dissipation at a lead temperature (TL) of 25°C, measured 3/8 inch (10 mm) from the body. Above 25°C TL, power must be linearly derated at 200 mW/°C, reaching zero at 125°C TL. When mounted on FR4 PCB with standard copper pads, its steady-state power drops to 1.47 W at 25°C ambient due to higher junction-to-ambient thermal resistance.
What does the "TR8" suffix indicate in 1N5356C/TR8?
"TR8" indicates tape-and-reel packaging per EIA-296 standard, with 8 mm carrier tape width and component orientation optimized for automated pick-and-place equipment. The 1N5356C/TR8 is supplied in reels containing 1,000 units, enabling high-volume assembly while maintaining RoHS compliance (e3 marking) and axial-lead mechanical integrity throughout handling and reflow.
Can the 1N5356C/TR8 replace a 1N4742A in an existing design?
The 1N5356C/TR8 is not a direct replacement for the 1N4742A (12 V, 1 W). While both are Zener diodes, the 1N5356C/TR8 regulates at 19 V with 5 W power handling and ±2% tolerance-significantly different voltage, power, and accuracy. Substitution would require circuit recalculations for bias current, thermal layout, and regulation setpoint. Use only after verifying compatibility with the target 19 V reference requirement and thermal design margins.
What is the maximum surge current rating for the 1N5356C/TR8?
The 1N5356C/TR8 has a maximum non-recurrent surge current (IZSM) rating of 20 A, specified for a single 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient energy without failure, making it suitable for clamping inductive kickback or lightning-induced surges in industrial controls. Surge capability is maintained across the full -65°C to +150°C operating temperature range per Microsemi's test methodology.
1N5356C/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:
- ±2%
- 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
1N5356C/TR8 FAQ
1.How can I place an order for 1N5356C/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5356C/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 1N5356C/TR8 reliable?
The price and inventory of 1N5356C/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5356C/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5356C/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5356C/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5356C/TR8?
1N5356C/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5356C/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 1N5356C/TR8?
For technical support, including 1N5356C/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5356C/TR8 requirements.
6.How does Aetrix verify that 1N5356C/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5356C/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 1N5356C/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5356C/TR8?
All 1N5356C/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5356C/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 1N5356C/TR8 part is unused and in its original packaging.
Return procedure for 1N5356C/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5356C/TR8 Tags
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