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Microchip Technology 1N5356BE3/TR8
- Part No.:
- 1N5356BE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5356BE3/TR8.pdf
- Description:
- DIODE ZENER 19V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,225
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Product details
Overview
1N5356BE3/TR8 from Microsemi is a 5 W, 19 V ±5% axial-leaded silicon Zener diode optimized for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation. It delivers stable regulation across –65°C to +150°C, supports 65 mA maximum Zener current (IZM), and exhibits low dynamic impedance (250 Ω at 65 mA) with minimal voltage drift (ΔVZ = 0.40 V).
For engineers reviewing the 1N5356BE3/TR8 datasheet, 1N5356BE3/TR8 pinout, 1N5356BE3/TR8 application, or 1N5356BE3/TR8 equivalent, key selection criteria include its 19 V nominal Zener voltage, ±5% tolerance (B suffix), RoHS-compliant matte-tin plating (e3), tape-and-reel packaging (TR8), and thermal resistance of 25 °C/W junction-to-lead at 10 mm lead length.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining a stable reverse-biased breakdown voltage under varying load and line conditions. Its design targets high-stability DC regulation where low dynamic impedance (ZZ = 250 Ω) and tight voltage tolerance (±5%) are required.
The 1N5356BE3/TR8 is rated for 5.0 W steady-state dissipation at TL < 25°C with 3/8″ lead length, derates linearly above 25°C, and withstands non-recurrent 8.3 ms surge currents up to 75 A. Its cathode band polarity and moisture-sensitive Level 1 classification per J-STD-020B eliminate dry-pack requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19 V nominal, ±5% tolerance - ensures precise regulation point for feedback networks requiring tight voltage references. |
| Test Current (IZT) | 65 mA - operating point at which VZ and ZZ are specified; aligns with typical mid-range regulation current in linear supplies. |
| Dynamic Impedance (ZZ) | 250 Ω max at IZT - low impedance minimizes output voltage variation under changing load current. |
| Max Regulator Current (IZM) | 75 mA - maximum continuous DC current before exceeding 5 W power limit at TL = 25°C. |
| Voltage Regulation (ΔVZ) | 0.40 V - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity over operating range. |
| Surge Current (IZSM) | 75 A peak (8.3 ms half-sine) - enables robust transient overvoltage clamping without failure. |
| Thermal Resistance | 25 °C/W junction-to-lead (3/8″ lead length) - supports high-current operation with simple lead-based heat sinking. |
Pinout & Package
Package: Axial-leaded T-18 plastic case (Void-free UL94V-0 epoxy), 0.7 g weight, cathode indicated by colored band. Leads are annealed matte-tin plated (RoHS-compliant e3) and solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit ground or lower-potential rail; forms reference return path in shunt regulator configuration. |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to unregulated input rail; maintains 19 V relative to anode during reverse conduction. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 5 W Zener | Industry-standard reliability and interchangeability; validated mechanical and electrical compliance per JEDEC DO-204AL. |
| ±5% voltage tolerance (B suffix) | Reduces need for post-regulation trimming in mid-precision applications such as industrial sensor references. |
| Moisture sensitivity Level 1 | No dry-pack or baking required prior to assembly - lowers manufacturing cost and eliminates moisture-related reflow defects. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling without special ESD controls - simplifies production line integration and field service replacement. |
| Tape-and-reel packaging (TR8) | Standard EIA-296 compliant format supporting automated SMT placement despite axial form factor - ideal for hybrid board assembly. |
Applications
| Industrial Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback or forward converter feedback loops using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Shunt reference providing stable 19 V threshold to drive optocoupler LED, enabling closed-loop output regulation. Use Value: Maintains ±1% output accuracy over temperature and line variations due to low ΔVZ (0.40 V) and stable ZZ (250 Ω). |
Use Scenario: Clamping transient surges on 24 V DC bus lines in PLC I/O modules exposed to inductive switching noise. IC Role / Device Role / Timing Role: Passive crowbar element conducting only above 19 V, diverting surge energy to ground before downstream ICs reach breakdown. Use Value: Withstands 75 A (8.3 ms) surge without degradation, protecting 24 V logic rails while avoiding false triggering below 19 V. |
| Programmable Reference Voltage Source | DC-DC Converter Trim Adjustment |
|
Use Scenario: Generating adjustable reference voltages in analog front-end circuits via resistor-divider scaling of Zener output. IC Role / Device Role / Timing Role: Primary voltage reference node; anode grounded, cathode feeding precision divider network feeding ADC reference or DAC feedback. Use Value: Delivers 19 V with ±5% initial accuracy and <0.40 V regulation spread - enables sub-0.5% total reference error after calibration. |
Use Scenario: Fine-tuning output voltage of fixed-output DC-DC modules (e.g., 12 V buck converters) using external trim resistors tied to feedback pin. IC Role / Device Role / Timing Role: Precision shunt element replacing internal bandgap reference to shift feedback threshold from 1.25 V to 19 V-derived setpoint. Use Value: Enables ±10% output adjustment range with predictable line regulation, leveraging 250 Ω ZZ to minimize trim sensitivity to current variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5356BRLG | Same 19 V ±5%, 5 W rating, but in bulk packaging (no TR8 tape/reel); lead finish is matte tin (RoHS), identical thermal specs. | Preferred for manual prototyping or low-volume hand-soldered assemblies where reel feed is unnecessary. | Select 1N5356BRLG when automated placement is not required and cost-per-unit is prioritized over reel logistics. |
| MMSZ5247B-TP | Surface-mount SOD-123 package, 19 V ±5%, 500 mW only - not power-compatible; higher ZZ (60 Ω typical), lower IZM (26 mA). | Only suitable for low-power signal-level referencing (<10 mA), not for 5 W regulation or surge clamping. | Choose MMSZ5247B-TP only for space-constrained PCBs where power demand is ≤0.5 W and thermal mass is limited. |
Compared with 1N5356BE3/TR8, 1N5356BRLG offers identical electrical and thermal performance in bulk form, while MMSZ5247B-TP trades 10× lower power capability and different package for SMT compatibility - neither is a drop-in replacement, but both serve distinct implementation constraints.
Availability
1N5356BE3/TR8 is available at Aetrix Electronics and suitable for industrial power supply feedback, overvoltage protection clamp, and programmable reference voltage source applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5356BE3/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 1N53xxB series was designed specifically for ruggedized 5 W Zener regulation in harsh-environment power systems, emphasizing thermal robustness, ESD immunity, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5356BE3/TR8?
The 1N5356BE3/TR8 has a nominal Zener voltage of 19 V with a ±5% tolerance, indicated by the "B" suffix in its part number. This means its actual breakdown voltage falls between 18.05 V and 19.95 V at the test current of 65 mA and lead temperature of 25°C, per Microsemi's published electrical characteristics table.
Does the 1N5356BE3/TR8 require dry-pack handling before soldering?
No, the 1N5356BE3/TR8 does not require dry-pack handling. It carries IPC/JEDEC J-STD-020B moisture sensitivity Level 1 classification, meaning it can be stored and assembled without baking or humidity-controlled packaging - simplifying manufacturing logistics and reducing process risk.
What is the maximum continuous Zener current for the 1N5356BE3/TR8?
The maximum continuous Zener current (IZM) for the 1N5356BE3/TR8 is 75 mA when operated at lead temperature (TL) ≤ 25°C with 3/8″ (10 mm) lead length from the body. At higher temperatures, this value must be reduced per the linear derating curve shown in Figure 1 of the Microsemi datasheet.
How is polarity marked on the 1N5356BE3/TR8?
The 1N5356BE3/TR8 uses a cathode band to indicate polarity: the banded end is the cathode and must be connected to the higher-potential side of the circuit (e.g., unregulated input rail), while the unbanded end is the anode and connects to ground or the reference node in shunt regulator configurations.
Is the 1N5356BE3/TR8 RoHS compliant?
Yes, the 1N5356BE3/TR8 is RoHS compliant, as confirmed by the "e3" suffix in its full part number. This denotes matte-tin lead plating meeting EU RoHS Directive 2011/65/EU requirements, with no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE substances above threshold limits.
1N5356BE3/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:
- ±5%
- 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
1N5356BE3/TR8 FAQ
1.How can I place an order for 1N5356BE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5356BE3/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 1N5356BE3/TR8 reliable?
The price and inventory of 1N5356BE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5356BE3/TR8 is usually 5 days.
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4.How is shipping managed for 1N5356BE3/TR8?
1N5356BE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5356BE3/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 1N5356BE3/TR8?
For technical support, including 1N5356BE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5356BE3/TR8 requirements.
6.How does Aetrix verify that 1N5356BE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5356BE3/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 1N5356BE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5356BE3/TR8?
All 1N5356BE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5356BE3/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 1N5356BE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5356BE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5356BE3/TR8 Tags
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