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Microchip Technology 1N5353E3/TR8
- Part No.:
- 1N5353E3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5353E3/TR8.pdf
- Description:
- DIODE ZENER 16V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,498
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Product details
Overview
1N5353E3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 16 V, ±5% tolerance (B-suffix equivalent), 75 mA test current (IZT), 2.5 Ω maximum dynamic impedance (ZZ), and 6.0 V maximum voltage regulation (ΔVZ) across 10–50% of IZM. 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 1N5353E3/TR8 datasheet, 1N5353E3/TR8 pinout, 1N5353E3/TR8 application, or 1N5353E3/TR8 equivalent, this page delivers verified electrical parameters, thermal derating behavior, RoHS-compliant packaging details, and direct alternatives for industrial power regulation design.
Technical Context
This device functions as a two-terminal voltage reference diode operating in reverse breakdown mode. Its regulation stability relies on low dynamic impedance (2.5 Ω at 75 mA) and tight voltage regulation (ΔVZ = 6.0 V), enabling consistent clamping across wide current ranges (10–50% of IZM). The 25 °C/W junction-to-lead thermal resistance supports high steady-state current (75 mA) when mounted with 3/8″ lead length.
It features moisture sensitivity level 1 per IPC/JEDEC J-STD-020B-no dry pack required-and RoHS-compliant matte-tin plating per MIL-STD-750 Method 2026. Polarity is marked by cathode band; operation requires banded end positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16 V nominal; regulates within ±5% (15.2–16.8 V) at 75 mA test current |
| Power Dissipation | 5.0 W at TL = 25°C with 3/8″ lead length; derates linearly above 25°C |
| Dynamic Impedance (ZZ) | 2.5 Ω max at 75 mA; ensures minimal output voltage shift under load transients |
| Max Regulator Current (IZM) | 75 mA; maximum continuous DC current before thermal runaway at rated power |
| Voltage Regulation (ΔVZ) | 6.0 V max; difference between VZ measured at 10% and 50% of IZM |
| Thermal Resistance | 25 °C/W junction-to-lead; enables reliable heat transfer with standard axial mounting |
| Operating Temperature | –65°C to +150°C; suitable for under-hood automotive and industrial ambient environments |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free thermosetting epoxy, UL94V-0 rated), 0.7 g weight, cathode indicated by colored band. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias reference terminal | Connected to system ground or lower-potential node during regulation |
| Cathode | Zener breakdown terminal | Marked by band; connected to regulated voltage rail; must be at higher potential than anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions and electrical behavior across global supply chain |
| RoHS-compliant e3 suffix | Meets EU Directive 2011/65/EU; matte-tin plating eliminates lead content without sacrificing solderability |
| Level 1 moisture sensitivity | No dry pack or baking required prior to PCB assembly-reduces manufacturing overhead |
| High surge current rating | 295 A peak (8.3 ms half-sine); withstands transient overvoltage events in power rails |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020; no special handling needed during board assembly |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Provides stable 16 V reference for optocoupler-based feedback in isolated 48 V DC-DC converters. IC Role / Device Role / Timing Role: Zener diode acting as precision shunt regulator in secondary-side error amplifier circuit. Use Value: Maintains ±5% output voltage accuracy across line/load/temperature variations due to low ΔVZ and stable ZZ. | Use Scenario: Supplies fixed bias voltage to bridge-type pressure transducers in factory automation systems. IC Role / Device Role / Timing Role: Shunt reference establishing excitation voltage independent of supply ripple. Use Value: Enables <1% full-scale measurement drift over –40°C to +85°C via tight VZ tolerance and low thermal coefficient. |
| Overvoltage Clamp Protection | Programmable Threshold Detector |
Use Scenario: Clamps 24 V rail surges above 17 V in motor drive control boards to protect gate drivers. IC Role / Device Role / Timing Role: Transient voltage suppressor operating in reverse breakdown during fault conditions. Use Value: Absorbs up to 5 W continuously and 295 A surge (8.3 ms) without failure-no crowbar circuit needed. | Use Scenario: Sets trip point for comparator-based battery undervoltage lockout in telecom backup systems. IC Role / Device Role / Timing Role: Precision threshold element defining 16 V cutoff voltage for LiFePO₄ battery packs. Use Value: Delivers repeatable activation at 15.2–16.8 V across 1000+ cycles due to stable VZ and low knee impedance (ZZK = 400 Ω @ 1 mA). |
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%, 5 W rating but non-RoHS tin-lead plating; no e3 suffix | Not compliant with RoHS Directive 2011/65/EU; unsuitable for EU-market final products | Select only for legacy repair or non-regulated markets where leaded finish is acceptable |
| SMBJ5353B | Surface-mount SMB package; identical electrical specs but 85 °C/W junction-to-ambient thermal resistance | Requires PCB layout change; lower power handling without heatsinking due to higher thermal resistance | Choose for space-constrained designs where axial leads are impractical and thermal management permits |
Compared with 1N5353B and SMBJ5353B, the 1N5353E3/TR8 offers RoHS compliance without sacrificing regulation accuracy or surge capability, while maintaining the proven thermal performance of axial-leaded mounting-ideal for through-hole production and high-reliability industrial use.
Availability
1N5353E3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor references, overvoltage clamp protection, and programmable threshold detection requiring stable component supply and long-term obsolescence management.
Supply support for 1N5353E3/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 specifically for robust, high-power voltage regulation in harsh-environment power systems-emphasizing thermal resilience, surge immunity, and long-term parametric stability.
FAQ
What is the Zener voltage tolerance of the 1N5353E3/TR8?
The 1N5353E3/TR8 has a ±5% Zener voltage tolerance, confirmed by its "B"-equivalent specification in the Microsemi 1N5333B–1N5388B datasheet. This means its actual regulation voltage falls between 15.2 V and 16.8 V when measured at 75 mA and 25°C lead temperature. The "E3" suffix denotes RoHS compliance but does not alter voltage tolerance.
Does the 1N5353E3/TR8 require dry packing before reflow soldering?
No, the 1N5353E3/TR8 does not require dry packing. It is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ≤30°C/60% RH without baking. This eliminates pre-reflow moisture removal steps and reduces manufacturing risk compared to higher-MSL components.
What is the maximum surge current rating for the 1N5353E3/TR8?
The 1N5353E3/TR8 has a maximum non-recurrent surge current (IZSM) of 295 A, specified as the peak value of an 8.3 ms half-sine waveform. This rating is validated per Microsemi's published electrical characteristics table and reflects the device's ability to absorb transient energy without degradation-critical for input-stage clamping in industrial power systems.
How does thermal resistance affect the 1N5353E3/TR8's power handling on a PCB?
The 1N5353E3/TR8 has a junction-to-lead thermal resistance of 25 °C/W when leads are trimmed to 3/8″ (10 mm) from the body. On FR4 with 1 oz copper, its junction-to-ambient resistance rises to 85 °C/W-reducing usable power to ~1.47 W at 25°C ambient. Proper lead length control is essential to maintain full 5 W capability in high-power applications.
Can the 1N5353E3/TR8 replace the 1N5353B in existing designs?
Yes, the 1N5353E3/TR8 is a direct functional and mechanical replacement for the 1N5353B, sharing identical Zener voltage, tolerance, power rating, package outline, and pinout. The only difference is RoHS-compliant matte-tin plating versus tin-lead-making it suitable for new designs targeting EU compliance without layout or thermal redesign.
1N5353E3/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
1N5353E3/TR8 FAQ
1.How can I place an order for 1N5353E3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5353E3/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 1N5353E3/TR8 reliable?
The price and inventory of 1N5353E3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5353E3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5353E3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5353E3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5353E3/TR8?
1N5353E3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5353E3/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 1N5353E3/TR8?
For technical support, including 1N5353E3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5353E3/TR8 requirements.
6.How does Aetrix verify that 1N5353E3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5353E3/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 1N5353E3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5353E3/TR8?
All 1N5353E3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5353E3/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 1N5353E3/TR8 part is unused and in its original packaging.
Return procedure for 1N5353E3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5353E3/TR8 Tags
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