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Microchip Technology 1N5353B/TR8
- Part No.:
- 1N5353B/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5353B/TR8.pdf
- Description:
- DIODE ZENER 16V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
1N5353B/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 16 V, ±5% tolerance (B suffix), 2.5 Ω maximum dynamic impedance at 75 mA test current, and 75 mA maximum regulator current when adequately heat-sunk. It operates across –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5353B/TR8 datasheet, 1N5353B/TR8 pinout, 1N5353B/TR8 application, or 1N5353B/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (6.0 A), reverse leakage (≤1.0 µA at 11.5 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown mode. Its 16 V nominal Zener voltage is specified at 75 mA test current (IZT), with voltage regulation (ΔVZ) of 0.30 V between 10% and 50% of IZM - indicating stable regulation under varying load currents.
Thermal design relies on its low junction-to-lead thermal resistance (25 °C/W at 3/8″ lead length), enabling 5 W steady-state dissipation at TL < 25 °C. It exhibits minimal voltage drift versus temperature and current, validated by tight dynamic impedance (2.5 Ω) and low knee impedance (295 Ω at 1 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16 V ±5% at 75 mA - defines precise regulation point for feedback loops and reference circuits |
| Power Dissipation | 5.0 W at 25 °C lead temperature - requires thermal management for sustained operation |
| Dynamic Impedance (ZZ) | 2.5 Ω max at IZT = 75 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage Current | ≤1.0 µA at VR = 11.5 V - guarantees low standby power loss in high-impedance bias networks |
| Surge Current (IZSM) | 6.0 A peak (8.3 ms half-sine) - withstands transient overvoltage events without degradation |
| Operating Temperature | –65 °C to +150 °C - supports deployment in automotive engine compartments and industrial enclosures |
| Thermal Resistance | 25 °C/W junction-to-lead - enables direct heatsinking via leads; 85 °C/W junction-to-ambient on FR4 |
Pinout & Package
Package: Axial-leaded T-18 plastic encapsulated case (Void-free UL94V-0 epoxy), cathode indicated by band. Leads are tin-lead or RoHS-compliant annealed matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower-potential node in shunt regulation configuration |
| Cathode (banded end) | Zener breakdown terminal / Regulated output node | Connected to voltage source input; maintains 16 V relative to anode during reverse conduction |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions and electrical behavior across global supply chain |
| Moisture sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during board assembly and testing |
| RoHS-compliant option (e3 suffix) | Meets environmental compliance requirements without performance trade-offs |
| Tape-and-reel packaging (TR suffix) | Enables automated pick-and-place assembly; TR8 denotes 8 mm tape width |
Applications
| Industrial Power Supply Regulation | Automotive Engine Control Unit Reference |
|---|---|
Use Scenario: Stabilizing 16 V rail in isolated DC-DC converter feedback network. IC Role / Device Role / Timing Role: Shunt voltage reference providing error signal to PWM controller. Use Value: Maintains ±0.8 V regulation (ΔVZ = 0.30 V) across 7.5–37.5 mA load range, ensuring consistent switching frequency and output accuracy. | Use Scenario: Providing stable 16 V reference for sensor biasing in harsh under-hood environments. IC Role / Device Role / Timing Role: Precision voltage clamp protecting analog front-end inputs from load-dump transients. Use Value: Withstands –65 °C to +150 °C ambient and absorbs 6.0 A surge (8.3 ms), preventing ADC saturation during battery voltage spikes. |
| Telecom Line Card Overvoltage Protection | Test Equipment Calibration Reference |
Use Scenario: Clamping induced surges on -48 V telecom distribution lines. IC Role / Device Role / Timing Role: Transient voltage suppressor placed across line-to-ground interface. Use Value: Low 2.5 Ω dynamic impedance minimizes clamping voltage overshoot during fast-rising transients up to 6.0 A peak. | Use Scenario: Serving as traceable 16 V calibration standard in bench multimeters and source-measure units. IC Role / Device Role / Timing Role: Primary voltage reference element in precision divider networks. Use Value: ±5% tolerance and 0.30 V regulation ensure repeatable 16 V output across multiple measurement cycles without active compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5353B (bulk) | No TR8 tape-and-reel packaging; same electrical specs and T-18 package | Not suitable for automated SMT assembly; requires manual or bulk-feed placement | Select 1N5353B/TR8 when using pick-and-place equipment; choose bulk for hand-soldered prototypes or low-volume repair |
| MMBZ5245B (SOT-23) | Surface-mount package, 0.5 W rating, 15 V nominal, ±5% - lower power, smaller footprint | Used in space-constrained PCBs where thermal mass limits power handling; not interchangeable without layout change | Choose MMBZ5245B only for low-power, high-density designs; 1N5353B/TR8 remains preferred for 5 W dissipation and axial mounting flexibility |
Compared with 1N5353B (bulk) and MMBZ5245B, the 1N5353B/TR8 uniquely combines JEDEC-standardized axial form factor, 5 W power capability, tape-and-reel automation support, and full industrial temperature range - making it optimal for production-grade power regulation where thermal robustness and assembly scalability are critical.
Availability
1N5353B/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, automotive control modules, telecom infrastructure, and test equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5353B/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 designed specifically for ruggedized voltage regulation in high-temperature, high-surge environments - emphasizing thermal stability, ESD immunity, and JEDEC-standardized manufacturability.
FAQ
What is the Zener voltage tolerance of the 1N5353B/TR8?
The 1N5353B/TR8 has a nominal Zener voltage of 16 V with a tolerance of ±5%, as indicated by the "B" suffix per Microsemi documentation. This means the actual measured VZ falls between 15.2 V and 16.8 V when tested at 75 mA and 25 °C lead temperature. The tolerance is guaranteed across the full operating temperature range of –65 °C to +150 °C.
Can the 1N5353B/TR8 be used without a heatsink?
The 1N5353B/TR8 can operate without an external heatsink only at significantly derated power levels. At ambient temperature (25 °C), its junction-to-ambient thermal resistance is 85 °C/W on FR4 with 4 mm² copper pads, limiting usable power to ~1.47 W. For full 5 W operation, the device requires mounting with 3/8″ (10 mm) lead length and heat sinking to maintain lead temperature below 25 °C - as defined in the 1N5353B/TR8 derating curve.
What does the "TR8" suffix mean in 1N5353B/TR8?
The "TR8" suffix in 1N5353B/TR8 indicates tape-and-reel packaging per EIA-296 standard with 8 mm carrier tape width. This format enables automated surface-mount assembly using pick-and-place machines. The underlying electrical and thermal specifications of the 1N5353B/TR8 remain identical to the bulk version (1N5353B); only the packaging differs.
Is the 1N5353B/TR8 RoHS compliant?
Yes, the 1N5353B/TR8 is RoHS compliant when ordered with the "e3" suffix (e.g., 1N5353B/TR8 e3). Standard production uses RoHS-compliant annealed matte-tin plating on leads per MIL-STD-750 Method 2026. The base part number 1N5353B/TR8 may be supplied either with traditional tin-lead or RoHS-compliant plating depending on order specification; confirmation of compliance should be verified via lot-specific Certificates of Conformance.
How does the 1N5353B/TR8 perform under surge conditions?
The 1N5353B/TR8 is rated for a non-recurrent peak surge current (IZSM) of 6.0 A, defined as a single 8.3 ms half-sine waveform. This capability allows it to absorb transient overvoltages - such as load dump or inductive kickback - without parametric shift or failure. Its robust construction, low dynamic impedance (2.5 Ω), and high junction temperature rating (+150 °C) collectively ensure reliable surge resilience in demanding applications like automotive and industrial power systems.
1N5353B/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:
- ±5%
- 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
1N5353B/TR8 FAQ
1.How can I place an order for 1N5353B/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5353B/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 1N5353B/TR8 reliable?
The price and inventory of 1N5353B/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5353B/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5353B/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5353B/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5353B/TR8?
1N5353B/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5353B/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 1N5353B/TR8?
For technical support, including 1N5353B/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5353B/TR8 requirements.
6.How does Aetrix verify that 1N5353B/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5353B/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 1N5353B/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5353B/TR8?
All 1N5353B/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5353B/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 1N5353B/TR8 part is unused and in its original packaging.
Return procedure for 1N5353B/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5353B/TR8 Tags
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