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Microchip Technology 1N5354E3/TR8
- Part No.:
- 1N5354E3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5354E3/TR8.pdf
- Description:
- DIODE ZENER 17V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,102
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Product details
Overview
1N5354E3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 17 V, ±5% tolerance (B-suffix equivalent), 70 mA test current, 2.5 Ω maximum dynamic impedance at IZT, and 5.8 V maximum voltage regulation (ΔVZ) across 10–50% of IZM. It serves as a precision shunt voltage reference in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N5354E3/TR8 datasheet, 1N5354E3/TR8 pinout, 1N5354E3/TR8 application, or 1N5354E3/TR8 equivalent, key selection criteria include Zener voltage stability under varying load current, thermal resistance (25 °C/W junction-to-lead), surge current rating (75 A), RoHS-compliant matte-tin plating, and T-18 package compatibility with through-hole PCB assembly.
Technical Context
This device operates as a shunt regulator by maintaining a stable reverse-biased voltage across its terminals when current exceeds the knee point. Its low dynamic impedance (2.5 Ω) ensures minimal voltage deviation over regulated current range (10–50% of IZM = 7.0–35 mA), and its 25 °C/W thermal resistance enables reliable 5 W dissipation with 3/8″ lead length heat sinking.
The 1N5354E3/TR8 exhibits 0.35 V maximum ΔVZ at 1 mA knee current (ZZK), supports 1.2 V forward voltage at 1.0 A, and withstands 8.3 ms half-sine surge currents up to 75 A - critical for transient suppression in DC power rails and analog reference circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 17 V ±5% - precise shunt reference for 15–19 V system rails |
| Test Current (IZT) | 70 mA - operating point where VZ and ZZ are specified; defines stable regulation zone |
| Dynamic Impedance (ZZ) | 2.5 Ω max at IZT - low AC resistance ensures <0.175 V variation per 70 mA current change |
| Max Regulator Current (IZM) | 75 mA - maximum continuous DC current at 25 °C lead temperature for full 5 W operation |
| Voltage Regulation (ΔVZ) | 5.8 V max - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity |
| Surge Current (IZSM) | 75 A peak (8.3 ms half-sine) - enables robust transient clamping without failure |
| Thermal Resistance | 25 °C/W junction-to-lead (3/8″ lead length) - allows full 5 W dissipation with simple lead heatsinking |
Pinout & Package
Package: T-18 axial-leaded plastic case (Void-free UL94V-0 epoxy), cathode indicated by band; leads plated with RoHS-compliant annealed matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse bias applied between cathode and anode |
| Cathode | Regulated output node | Banded end; held at stable 17 V relative to anode during regulation; carries full load current |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB family mechanical and electrical definitions |
| RoHS-compliant (e3 suffix) | Lead-free matte-tin plating meets EU Directive 2011/65/EU; no dry pack required (Moisture Level 1) |
| High surge capability | 75 A non-recurrent surge rating enables use in input-stage transient protection without derating |
| Low voltage regulation drift | 5.8 V ΔVZ over 10–50% IZM ensures predictable error budget in feedback networks |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - safe for handling without special ESD controls |
Applications
| Switching Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback loop via optocoupler-coupled TL431 replacement. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 17 V reference to error amplifier input. Use Value: Enables ±1% output regulation accuracy with low ZZ minimizing loop gain variation across load range. |
Use Scenario: Clamps 24 V DC rail against surges exceeding 20 V during hot-swap or inductive kick events. IC Role / Device Role / Timing Role: Passive crowbar element diverting excess current to ground when rail exceeds 17 V. Use Value: 75 A surge rating absorbs 8.3 ms transients without degradation; 25 °C/W RθJL sustains repeated events. |
| Industrial Sensor Reference | Programmable Logic Controller Input Conditioning |
Use Scenario: Provides stable 17 V bias for precision RTD or strain gauge bridge excitation in 0–70 °C environments. IC Role / Device Role / Timing Role: Low-drift voltage source referenced to system ground for analog front-end excitation. Use Value: ±5% VZ tolerance and 5.8 V ΔVZ ensure <±0.9 V total error across operating current range - sufficient for 12-bit ADC systems. |
Use Scenario: Limits input voltage to PLC digital input stage protecting 24 V logic interface from field-wiring faults. IC Role / Device Role / Timing Role: Fail-safe clamp preventing >17 V from reaching internal Schmitt trigger and protection diodes. Use Value: Cathode-band polarity ensures correct orientation in series-clamp configuration; RoHS plating ensures long-term solder joint reliability. |
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 e3 RoHS suffix; SnPb plating; same VZ, IZT, ZZ, IZM, and package | Not compliant with EU RoHS Directive; requires dry pack per J-STD-020B Level 1 (not needed for e3) | Select 1N5354B only for legacy SnPb assembly or non-RoHS exempt programs |
| MMSZ5246B-TP | Surface-mount SOD-123 package; 17 V ±5%; 20 mA IZT; 20 Ω ZZ; 350 mW Pd | Lower power (0.35 W vs. 5 W); unsuitable for high-current regulation or surge clamping | Choose MMSZ5246B-TP only for space-constrained low-power biasing where thermal mass is limited |
Compared with 1N5354B and MMSZ5246B-TP, the 1N5354E3/TR8 uniquely delivers 5 W power handling, 75 A surge immunity, and RoHS compliance in a standard axial T-18 package - making it the only option among the three suitable for industrial-grade shunt regulation and transient suppression.
Availability
1N5354E3/TR8 is available at Aetrix Electronics and suitable for switching power supplies, overvoltage protection circuits, industrial sensor references, and PLC input conditioning requiring stable component supply and long-lifecycle support.
Supply support for 1N5354E3/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 timing solutions for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for ruggedized 5 W Zener regulation in harsh-environment power systems - emphasizing thermal robustness, surge resilience, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5354E3/TR8?
The 1N5354E3/TR8 has a nominal Zener voltage of 17 V with ±5% tolerance, as confirmed by the "B"-equivalent specification in Microsemi's 1N5333B–1N5388B datasheet and the e3 suffix indicating RoHS compliance without altering tolerance. This means the actual VZ falls between 16.15 V and 17.85 V at 70 mA and 25 °C lead temperature. The 1N5354E3/TR8 maintains this tolerance across its rated operating temperature range of –65 °C to +150 °C.
Does the 1N5354E3/TR8 require moisture-sensitive handling?
No, the 1N5354E3/TR8 has IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1, meaning it is not moisture-sensitive and does not require dry pack or baking prior to soldering. This is explicitly stated in the Microsemi datasheet under "Features" and "Mechanical and Packaging" sections. The 1N5354E3/TR8 uses void-free UL94V-0 epoxy encapsulation and RoHS-compliant matte-tin plating, both contributing to its Level 1 classification - simplifying manufacturing logistics versus higher-level MSL components.
What is the maximum continuous current the 1N5354E3/TR8 can handle at room temperature?
The 1N5354E3/TR8 supports a maximum continuous Zener current (IZM) of 75 mA at 25 °C lead temperature (TL), corresponding to its full 5 W power rating. This value is derived from P = VZ × IZM using the upper limit of the ±5% tolerance (17.85 V × 75 mA ≈ 1.34 W), but the datasheet specifies 75 mA directly for B-suffix parts. Operation above 75 mA requires active heat sinking or derating per Figure 1's power derating curve - for example, 3.75 W at TL = 100 °C.
Can the 1N5354E3/TR8 be used as a direct replacement for the 1N5354B?
Yes, the 1N5354E3/TR8 is a direct functional and mechanical replacement for the 1N5354B, sharing identical Zener voltage (17 V), tolerance (±5%), test current (70 mA), dynamic impedance (2.5 Ω), package (T-18), and pinout. The only differences are RoHS-compliant matte-tin plating (vs. SnPb on 1N5354B) and tape-and-reel packaging (TR8). No PCB layout or schematic changes are needed - the 1N5354E3/TR8 drops into existing 1N5354B footprints with improved environmental compliance.
What is the surge current rating of the 1N5354E3/TR8 and how is it defined?
The 1N5354E3/TR8 has a maximum non-recurrent surge current (IZSM) of 75 A, defined as the peak amplitude of an 8.3 ms half-sine waveform per Note 5 in the Microsemi datasheet. This rating reflects the device's ability to absorb single-event transients - such as inductive switch-off spikes or lightning-induced surges - without parametric shift or failure. The 1N5354E3/TR8 achieves this via low thermal resistance (25 °C/W) and robust junction design, enabling reliable operation in unprotected DC input stages.
1N5354E3/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
1N5354E3/TR8 FAQ
1.How can I place an order for 1N5354E3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5354E3/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 1N5354E3/TR8 reliable?
The price and inventory of 1N5354E3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5354E3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5354E3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5354E3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5354E3/TR8?
1N5354E3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5354E3/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 1N5354E3/TR8?
For technical support, including 1N5354E3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5354E3/TR8 requirements.
6.How does Aetrix verify that 1N5354E3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5354E3/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 1N5354E3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5354E3/TR8?
All 1N5354E3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5354E3/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 1N5354E3/TR8 part is unused and in its original packaging.
Return procedure for 1N5354E3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5354E3/TR8 Tags
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