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Microchip Technology 1N5354/TR8
- Part No.:
- 1N5354/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5354/TR8.pdf
- Description:
- DIODE ZENER 17V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:4,831
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Product details
Overview
1N5354/TR8 from Microsemi is a silicon 5 W axial-leaded Zener diode with nominal regulation voltage of 17 V, ±5% tolerance (B suffix), maximum dynamic impedance of 2.5 Ω at 70 mA test current, and maximum reverse current of 0.5 μA at 12.2 V. It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5354/TR8 datasheet, 1N5354/TR8 pinout, 1N5354/TR8 application, or 1N5354/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (5.8 A), voltage regulation (ΔVZ = 0.35 V), and RoHS-compliant e3 marking compatibility.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown mode. Its Zener voltage is specified at 70 mA test current (IZT) with 1 kHz AC impedance measurement superimposed on DC bias, and its regulation stability is defined by ΔVZ measured between 10% and 50% of IZM.
The 1N5354/TR8 features low thermal resistance (25 °C/W junction-to-lead at 10 mm lead length), enabling stable regulation under high DC current when adequately heat-sunk. It exhibits minimal voltage drift versus current due to tight dynamic impedance (2.5 Ω) and low knee impedance (500 Ω at 1 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 17 V ±5% - precise regulation point at 70 mA, suitable for 15–19 V reference rails |
| Power Dissipation | 5.0 W at TL = 25 °C - supports high-current regulation with proper heatsinking |
| Dynamic Impedance (ZZ) | 2.5 Ω max at IZT = 70 mA - ensures low output impedance and stable voltage under load variation |
| Max Reverse Current (IR) | 0.5 μA at VR = 12.2 V - guarantees low leakage in standby or low-power monitoring circuits |
| Surge Current (IZSM) | 5.8 A peak (8.3 ms half-sine) - withstands transient overvoltage events without failure |
| Voltage Regulation (ΔVZ) | 0.35 V - difference between VZ at 10% and 50% of IZM, indicating tight regulation linearity |
| Junction-to-Lead Thermal Resistance | 25 °C/W - enables predictable thermal design with axial lead mounting and 10 mm lead length |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-204AL. Void-free UL94V-0 epoxy body; cathode indicated by band; leads plated with annealed matte tin (RoHS compliant) or tin-lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage side in reverse-bias regulation | Connected to system ground or lower-potential node during Zener operation |
| Cathode | Reverse breakdown terminal / regulated output node | Banded end; connected to input rail to clamp voltage at 17 V ±5% |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions, marking, and reliability across manufacturers |
| 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 |
| High surge current capability | 5.8 A non-recurrent half-sine (8.3 ms) - protects downstream circuitry from lightning or inductive spikes |
| e3 RoHS-compliant marking | Confirms lead-free plating and compliance with EU RoHS Directive 2011/65/EU |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing 17 V reference rail in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Voltage reference element providing stable bias for ADC front-end amplifiers. Use Value: Maintains <0.35 V regulation error across 7–35 mA operating range, ensuring ±0.2% full-scale accuracy in 12-bit measurements. |
Use Scenario: Clamping transient surges on 24 V DC control bus in factory automation systems. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy to ground during inductive load switching. Use Value: Absorbs 5.8 A surge (8.3 ms) without degradation, preventing latch-up in connected I/O drivers. |
| Test Equipment Reference Source | Telecom Line Interface Protection |
Use Scenario: Generating calibrated 17 V reference in portable multimeter calibration fixtures. IC Role / Device Role / Timing Role: Precision voltage standard traceable to NIST via ±5% tolerance and low ΔVZ. Use Value: Delivers 17.0 ±0.85 V over –25 °C to +70 °C ambient, meeting ANSI C12.1 accuracy requirements. |
Use Scenario: Protecting RS-485 transceivers from induced surges on long-haul field wiring. IC Role / Device Role / Timing Role: Primary clamping device placed before TVS diode in multi-stage protection network. Use Value: Activates at 17 V to limit voltage before secondary TVS triggers, reducing stress on IC-level protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5354B | No TR8 tape-and-reel packaging; bulk or ammo pack only; identical electrical specs and T-18 package | Suitable for manual prototyping or low-volume hand-soldered assemblies where reel feeding is unnecessary | Select 1N5354B for bench evaluation or small-batch builds without SMT placement equipment |
| MMBZ5246BS-7-F | Surface-mount SOD-123 package; 17 V ±5%; 250 mW rating; higher ZZ (20 Ω); not drop-in compatible | Used in space-constrained PCBs where axial leads are impractical; requires layout redesign | Choose MMBZ5246BS-7-F only when board real estate mandates SMT and thermal derating to 250 mW is acceptable |
Compared with 1N5354/TR8, the 1N5354B offers identical regulation performance without tape-and-reel convenience, while the MMBZ5246BS-7-F trades 5 W power handling and axial-mount flexibility for miniaturization-requiring thermal and layout reassessment.
Availability
1N5354/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, precision reference sources, and telecom line interface designs requiring stable component supply and long-term obsolescence management.
Supply support for 1N5354/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal robustness, surge resilience, and JEDEC-standardized manufacturability.
FAQ
What is the Zener voltage tolerance of the 1N5354/TR8?
The 1N5354/TR8 has a ±5% Zener voltage tolerance, confirmed by the "B" suffix in its part number per Microsemi's datasheet. This means its regulation voltage falls within 16.15 V to 17.85 V at 70 mA test current and 25 °C lead temperature. The 1N5354/TR8 achieves this tolerance through post-package sorting and is validated per JEDEC registration requirements.
Does the 1N5354/TR8 require dry packing for moisture sensitivity?
No, the 1N5354/TR8 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it is not hygroscopic and does not require dry pack or baking before reflow soldering. Its void-free UL94V-0 epoxy encapsulation provides inherent moisture resistance, simplifying manufacturing logistics and reducing process risk.
What is the maximum steady-state power dissipation of the 1N5354/TR8 on a standard FR4 PCB?
When mounted on a standard FR4 PCB (1 oz copper, 4 mm² pads, 1 mm track width, 25 mm length), the 1N5354/TR8 delivers 1.47 W steady-state power at 25 °C ambient, per its thermal resistance of 85 °C/W junction-to-ambient. This value is derived from Figure 1 derating curve and must be applied in layout thermal analysis.
Can the 1N5354/TR8 be used as a direct replacement for the 1N5354B?
Yes-the 1N5354/TR8 shares identical electrical specifications, T-18 package, and Zener characteristics with the 1N5354B; the only difference is tape-and-reel packaging (TR8) for automated assembly. No circuit or layout changes are needed, and both parts meet the same Microsemi qualification standards and JEDEC registration.
What is the surge current rating of the 1N5354/TR8 and how is it defined?
The 1N5354/TR8 has a maximum non-recurrent surge current (IZSM) of 5.8 A, defined as the peak amplitude of an 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient energy without parametric shift or catastrophic failure, making it suitable for protecting against inductive kickback and lightning-induced surges in industrial environments.
1N5354/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):
- 17 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 12.2 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
1N5354/TR8 FAQ
1.How can I place an order for 1N5354/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5354/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 1N5354/TR8 reliable?
The price and inventory of 1N5354/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5354/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5354/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5354/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5354/TR8?
1N5354/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5354/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 1N5354/TR8?
For technical support, including 1N5354/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5354/TR8 requirements.
6.How does Aetrix verify that 1N5354/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5354/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 1N5354/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5354/TR8?
All 1N5354/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5354/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 1N5354/TR8 part is unused and in its original packaging.
Return procedure for 1N5354/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5354/TR8 Tags
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