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Microchip Technology 1N5354A/TR8
- Part No.:
- 1N5354A/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5354A/TR8.pdf
- Description:
- DIODE ZENER 17V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,662
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Product details
Overview
1N5354A/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 17 V, ±10% tolerance (A suffix), 70 mA test current (IZT), 2.5 Ω maximum dynamic impedance (ZZ), and 75 mA maximum Zener current (IZM) at 25 °C lead temperature. It operates from –65 °C to +150 °C and is used for voltage reference and overvoltage protection in DC power supplies.
For engineers reviewing the 1N5354A/TR8 datasheet, 1N5354A/TR8 pinout, 1N5354A/TR8 application, or 1N5354A/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (100 A), voltage regulation (ΔVZ = 0.35 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, with Zener voltage specified at 17 V ±10% under 70 mA dc test current. Its low dynamic impedance (≤2.5 Ω) ensures stable regulation across varying load currents, and its 25 °C/W thermal resistance enables reliable 5 W operation when leads are maintained at ≤25 °C.
The 1N5354A/TR8 features a void-free thermosetting epoxy T-18 package, cathode band polarity marking, and compliance with IPC/JEDEC J-STD-020B Level 1 moisture sensitivity-no dry pack required. It withstands 8.3 ms half-sine surge currents up to 100 A and exhibits <0.35 V voltage regulation between 10% and 50% of IZM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 17 V ±10% - defines stable regulation point under 70 mA dc bias; actual range: 15.3–18.7 V |
| Power Dissipation | 5.0 W at TL = 25 °C - requires heat sinking via 3/8″ (10 mm) lead length for full rating |
| Dynamic Impedance (ZZ) | ≤2.5 Ω - ensures minimal output voltage shift with load current changes |
| Max Reverse Current (IR) | ≤0.5 μA at 12.2 V - guarantees low leakage below knee voltage |
| Surge Current (IZSM) | 100 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Voltage Regulation (ΔVZ) | 0.35 V - difference between VZ measured at 7.5 mA and 37.5 mA, indicating line regulation quality |
| Thermal Resistance | 25 °C/W junction-to-lead - enables thermal design using lead temperature as primary thermal metric |
Pinout & Package
T-18 axial-leaded plastic package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026. Weight: 0.7 g. Moisture sensitivity level: IPC/JEDEC J-STD-020B Level 1 - no dry pack required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased reference terminal | Connected to lower-potential node; forms regulated output reference when cathode is biased positive |
| Cathode | Zener breakdown terminal | Banded end; connected to higher-potential node; maintains stable 17 V drop across diode in reverse conduction |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xx mechanical and electrical definitions for interchangeability |
| ±10% voltage tolerance (A suffix) | Cost-optimized tolerance grade suitable for non-critical reference and clamp applications |
| Level 1 moisture sensitivity | Enables standard SMT/reflow handling without baking or special packaging |
| 100 A surge rating | Supports robust transient suppression in industrial power rails without external crowbar circuits |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for ESD handling protocols during assembly |
Applications
| DC Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing unregulated 24 V rail in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing fixed 17 V reference for error amplifier feedback. Use Value: Maintains ±0.35 V regulation across 7.5–37.5 mA load variation, enabling stable feedback loop performance without active regulation circuitry. |
Use Scenario: Protecting 15 V logic supply against 30 V transients induced by relay coil flyback. IC Role / Device Role / Timing Role: Passive voltage clamp diverting surge current away from downstream regulators and microcontrollers. Use Value: Absorbs 100 A (8.3 ms) surges without degradation, limiting clamped voltage to ≤18.7 V and preventing damage to 16 V-rated components. |
| Temperature-Stable Reference Source | Current-Limited Bias Generator |
Use Scenario: Generating precision bias for op-amp input stages in automotive sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Zener-based reference node with low dynamic impedance (≤2.5 Ω) minimizing noise coupling into high-gain analog paths. Use Value: Delivers stable 17 V reference across –40 °C to +125 °C ambient, with thermal resistance enabling predictable drift compensation in PCB layout. |
Use Scenario: Providing controlled base drive current to PNP transistor in linear current source for LED backlight dimming. IC Role / Device Role / Timing Role: Constant-voltage element establishing fixed emitter-base voltage drop to set collector current. Use Value: Enables accurate current setting (±10%) with minimal parts count; forward voltage (≤1.2 V @1 A) avoids unintended conduction during startup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5354B/TR8 | ±5% tolerance (B suffix) vs. ±10% (A); otherwise identical electrical specs and package | Higher precision required in feedback loops where tighter VZ stability reduces system gain error | Select 1N5354B/TR8 when reference accuracy dominates cost sensitivity |
| MMSZ5246BS-7-F | Surface-mount SOD-123 package (2.7 × 1.6 mm), 500 mW rating, 16 V ±5%, 100 mA IZM | Used in space-constrained consumer electronics; not interchangeable due to power and package mismatch | Choose MMSZ5246BS-7-F only for low-power, high-density layouts where 5 W dissipation is unnecessary |
Compared with 1N5354B/TR8, the 1N5354A/TR8 trades voltage precision for cost and simplifies tolerance-driven calibration steps; versus MMSZ5246BS-7-F, it delivers 10× higher power handling and axial-lead mounting flexibility but requires more board area and thermal management.
Availability
1N5354A/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and analog reference designs requiring stable component supply with consistent Zener voltage tolerance and surge resilience.
Supply support for 1N5354A/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 1N53xx series was designed as a JEDEC-standardized family of 5 W axial Zener diodes targeting ruggedized voltage regulation and transient suppression in harsh-environment power systems.
FAQ
What is the Zener voltage tolerance of the 1N5354A/TR8?
The 1N5354A/TR8 has a nominal Zener voltage of 17 V with ±10% tolerance, as indicated by the "A" suffix per Microsemi's documentation. This means the actual measured VZ falls between 15.3 V and 18.7 V at 70 mA test current and 25 °C lead temperature. The tolerance is verified per JEDEC registration and applies across the full operating temperature range.
Can the 1N5354A/TR8 be used in surface-mount designs?
No-the 1N5354A/TR8 uses an axial-leaded T-18 package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5354A series in DO-214AA (SMB) package. The 1N5354A/TR8 requires through-hole mounting with ≥10 mm lead length for thermal derating compliance.
What is the maximum surge current rating for the 1N5354A/TR8?
The 1N5354A/TR8 is rated for a peak non-recurrent surge current (IZSM) of 100 A, defined as an 8.3 ms half-sine waveform. This rating is confirmed in the Electrical Characteristics table on page 1 of the Microsemi datasheet and reflects the device's capability to absorb transient energy without parametric shift or failure.
Does the 1N5354A/TR8 require dry packing for moisture sensitivity?
No-the 1N5354A/TR8 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it may be stored and processed under standard factory conditions without baking or dry-pack requirements. This is explicitly stated in the Features section and confirmed in the Mechanical and Packaging table.
How does the thermal resistance specification apply to the 1N5354A/TR8?
The 1N5354A/TR8 has a junction-to-lead thermal resistance of 25 °C/W when measured at 3/8″ (10 mm) lead length from the body. This value enables thermal design using lead temperature (TL) as the primary thermal boundary condition-full 5 W power dissipation is only valid when TL ≤ 25 °C, per Figure 1 derating curve.
1N5354A/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:
- ±10%
- 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
1N5354A/TR8 FAQ
1.How can I place an order for 1N5354A/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5354A/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 1N5354A/TR8 reliable?
The price and inventory of 1N5354A/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5354A/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5354A/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5354A/TR8 transactions.
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4.How is shipping managed for 1N5354A/TR8?
1N5354A/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5354A/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 1N5354A/TR8?
For technical support, including 1N5354A/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5354A/TR8 requirements.
6.How does Aetrix verify that 1N5354A/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5354A/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 1N5354A/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5354A/TR8?
All 1N5354A/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5354A/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 1N5354A/TR8 part is unused and in its original packaging.
Return procedure for 1N5354A/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5354A/TR8 Tags
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MM5Z5V1ST1G
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