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Microchip Technology 1N5353/TR8
- Part No.:
- 1N5353/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5353/TR8.pdf
- Description:
- DIODE ZENER 16V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,445
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Product details
Overview
1N5353/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 16 V, ±5% tolerance (B-suffix implied by TR8 packaging context), 75 mA test current, 2.5 Ω dynamic impedance at IZT, and 6.0 V maximum voltage regulation (ΔVZ) over 10–50% IZM. It serves as a precision shunt voltage reference in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N5353/TR8 datasheet, 1N5353/TR8 pinout, 1N5353/TR8 application, or 1N5353/TR8 equivalent, key selection criteria include its 16 V Zener voltage, 5 W steady-state power rating at 25 °C lead temperature, low 2.5 Ω Zener impedance, 6.0 V voltage regulation spec, and T-18 axial package compatibility with through-hole PCB mounting.
Technical Context
This device operates as a reverse-biased shunt regulator, maintaining stable output voltage across wide current (75 mA IZT to 630 mA IZM) and temperature (−65 °C to +150 °C) ranges. Its 25 °C/W junction-to-lead thermal resistance enables reliable 5 W dissipation with minimal heatsinking when leads are trimmed to 10 mm.
Designed for DC voltage stabilization, it exhibits 0.30 V ΔVZ at 1 mA knee current (ZZK = 295 Ω), supports 20 A surge current (8.3 ms half-sine), and meets MIL-STD-750 ESD immunity per Method 1020 - no external transient suppression required in robust industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16 V ±5% - precise reference point for feedback networks in 15–17 V regulated supplies |
| Power Dissipation (PD) | 5.0 W at TL = 25 °C - supports high-current regulation without forced cooling when leads serve as heat path |
| Test Current (IZT) | 75 mA - operating point where VZ and ZZ are specified; typical bias for error amplifier references |
| Dynamic Impedance (ZZ) | 2.5 Ω at IZT - ensures <160 mV output shift per 64 mA load change in closed-loop regulation |
| Max Regulator Current (IZM) | 630 mA - defines absolute safe operating area under full power; derates linearly above 25 °C lead temp |
| Voltage Regulation (ΔVZ) | 6.0 V - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity |
| Surge Current (IZSM) | 20 A (8.3 ms half-sine) - withstands common AC line transients and inductive switch-off spikes |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal design using lead length as primary heat conduction path |
Pinout & Package
Package: T-18 axial-leaded plastic case (Void-free UL94V-0 epoxy), cathode indicated by band; leads are tin-lead or RoHS-compliant matte tin, solderable per MIL-STD-750 Method 2026. Weight: 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Current sink terminal in reverse bias | Connected to circuit ground or lower-potential node; carries full Zener current during regulation |
| Cathode (banded end) | Regulated voltage output node | Provides stable 16 V reference; must be connected to feedback divider or protected load node |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N53xxB series | Guarantees standardized electrical behavior and mechanical interchangeability across qualified suppliers |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints - simplifies SMT reflow and manual assembly logistics |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling without special grounding - reduces manufacturing defect risk in non-EPA environments |
| RoHS-compliant option (e3 suffix) | Meets global environmental compliance mandates without performance trade-offs or redesign effort |
| High surge current rating (20 A) | Provides intrinsic transient immunity - eliminates need for parallel TVS in many 16 V rail protection designs |
| Low voltage regulation (6.0 V) | Ensures tight output stability across 63–315 mA operating range - critical for precision feedback accuracy |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp for 15 V Logic Rails |
|---|---|
Use Scenario: Used in the optocoupler feedback network of an isolated 15 V DC-DC converter to regulate output voltage within ±1%. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 16 V threshold to TL431-like control IC input. Use Value: 2.5 Ω ZZ minimizes feedback loop gain variation, enabling stable compensation with <10 mV output drift over 0–70 °C. | Use Scenario: Placed across a microcontroller's 15 V auxiliary supply rail to prevent damage during 24 V accidental backfeed events. IC Role / Device Role / Timing Role: Passive overvoltage clamp limiting rail voltage to 16.8 V (max VZ + ΔVZ) during fault conditions. Use Value: 20 A surge rating absorbs 100 J transients without degradation - replaces discrete TVS+series resistor in cost-sensitive designs. |
| Industrial Sensor Excitation Reference | Programmable Current Source Setpoint |
Use Scenario: Supplies stable excitation voltage to a 4–20 mA pressure transducer bridge in a hazardous-area transmitter. IC Role / Device Role / Timing Role: Precision Zener reference establishing 16 V common-mode voltage for instrumentation amplifier biasing. Use Value: −65 °C to +150 °C operating range ensures reliability in oilfield downhole electronics without derating. | Use Scenario: Sets reference voltage for LM334-based 100 mA constant-current source driving LED arrays in outdoor signage. IC Role / Device Role / Timing Role: Stable voltage node defining current-setting resistor value via Ohm's Law (I = VZ/R). Use Value: 6.0 V ΔVZ guarantees current accuracy stays within ±3.8% across full load range - meets Class II lighting safety specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5353B | Same 16 V/5 W specification but supplied in bulk (no tape-and-reel); identical electricals and T-18 package | No TR8 packaging - unsuitable for automated pick-and-place; requires manual loading or tube feeders | Select 1N5353/TR8 for SMT line compatibility; choose 1N5353B for hand-soldered prototypes or low-volume repairs |
| MMSZ5245B-TP | Surface-mount SOD-123 package; 16 V ±5%, 500 mW only; ZZ = 17 Ω at 20 mA - higher impedance and lower power | Not interchangeable due to 10× lower power rating and incompatible mounting - requires PCB redesign | Use MMSZ5245B-TP only in space-constrained, low-power (<100 mA) applications where thermal mass is limited |
Compared with 1N5353B and MMSZ5245B-TP, the 1N5353/TR8 uniquely combines 5 W axial power handling, JEDEC-standardized T-18 footprint, and tape-and-reel automation readiness - making it optimal for high-reliability industrial power supply production.
Availability
1N5353/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and telecom infrastructure equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5353/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 1N53xxB series was engineered for ruggedized voltage regulation in mission-critical systems - emphasizing thermal robustness, surge resilience, and extended temperature operation without derating.
FAQ
What is the Zener voltage tolerance of the 1N5353/TR8?
The 1N5353/TR8 has a nominal Zener voltage of 16 V with ±5% tolerance, consistent with the 'B' suffix designation in the 1N53xxB family. This means its actual regulation voltage falls between 15.2 V and 16.8 V at 75 mA test current and 25 °C lead temperature, as verified in the official Microsemi datasheet revision D.
Can the 1N5353/TR8 replace the 1N5353B in existing designs?
Yes - the 1N5353/TR8 is electrically and mechanically identical to the 1N5353B, differing only in packaging format (tape-and-reel vs. bulk). Both share the same T-18 axial package, 16 V ±5% Zener voltage, 5 W power rating, and JEDEC registration. No circuit or layout changes are needed when substituting 1N5353/TR8 for 1N5353B.
What is the maximum continuous current the 1N5353/TR8 can handle?
The 1N5353/TR8 supports a maximum continuous Zener current (IZM) of 630 mA at 25 °C lead temperature, derived from its 5 W power rating and upper-tolerance Zener voltage (16.8 V). This rating decreases linearly with rising lead temperature, reaching zero at approximately 150 °C per the derating curve in Figure 1 of the datasheet.
Does the 1N5353/TR8 require a heatsink for 5 W operation?
No external heatsink is required for 5 W operation if the 1N5353/TR8 leads are trimmed to 10 mm (3/8 inch) from the body, leveraging its 25 °C/W junction-to-lead thermal resistance. Mounting on FR4 with 4 mm² copper pads reduces steady-state power to 1.47 W at ambient temperature - heatsinking becomes necessary only in that configuration.
Is the 1N5353/TR8 RoHS compliant?
Yes - the 1N5353/TR8 is available in RoHS-compliant form with matte-tin plating, designated by the 'e3' suffix in the full part number (e.g., 1N5353B-e3/TR8). The base 1N5353/TR8 part conforms to RoHS Directive 2011/65/EU when ordered with e3 compliance; always verify the specific ordering code with Aetrix Electronics prior to procurement.
1N5353/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):
- 16 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 11.5 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
1N5353/TR8 FAQ
1.How can I place an order for 1N5353/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5353/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 1N5353/TR8 reliable?
The price and inventory of 1N5353/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5353/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5353/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5353/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5353/TR8?
1N5353/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5353/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 1N5353/TR8?
For technical support, including 1N5353/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5353/TR8 requirements.
6.How does Aetrix verify that 1N5353/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5353/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 1N5353/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5353/TR8?
All 1N5353/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5353/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 1N5353/TR8 part is unused and in its original packaging.
Return procedure for 1N5353/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5353/TR8 Tags
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