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Microchip Technology 1N5371/TR8
- Part No.:
- 1N5371/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5371/TR8.pdf
- Description:
- DIODE ZENER 60V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,914
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Product details
Overview
1N5371/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal zener voltage of 60 V, ±5% tolerance (B suffix), 20 mA test current, 40 Ω dynamic impedance at IZT, and maximum reverse current of 0.5 μA at 45.5 V. It regulates voltage in power supply reference and overvoltage protection circuits across industrial temperature range.
For engineers reviewing the 1N5371/TR8 datasheet, 1N5371/TR8 pinout, 1N5371/TR8 application, or 1N5371/TR8 equivalent, key selection criteria include zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (350 A), voltage regulation (ΔVZ = 2.2 V), and RoHS-compliant matte-tin plating.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage across varying load currents and temperatures. Its low dynamic impedance (40 Ω) ensures minimal voltage deviation under current changes, while its 25 °C/W junction-to-lead thermal resistance enables reliable 5 W dissipation with 3/8″ lead length heat sinking.
The device features cathode band polarity marking, UL94V-0 epoxy encapsulation, and compliance with MIL-STD-750 for solderability and ESD robustness. It is rated for -65 °C to +150 °C operation and withstands 8.3 ms half-sine surge currents up to 350 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 60 V ±5% - precise reference voltage at 20 mA, enabling stable regulation in feedback loops. |
| Power Dissipation | 5.0 W at TL < 25 °C - supports high-current shunt regulation when adequately heat sunk. |
| Dynamic Impedance (ZZ) | 40 Ω at 20 mA - low AC impedance ensures tight voltage control under dynamic load conditions. |
| Reverse Current (IR) | 0.5 μA max at 45.5 V - guarantees low leakage in high-impedance bias/reference networks. |
| Surge Current (IZSM) | 350 A peak (8.3 ms half-sine) - provides transient overvoltage clamping capability. |
| Voltage Regulation (ΔVZ) | 2.2 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity. |
| Thermal Resistance | 25 °C/W junction-to-lead (3/8″ lead length) - defines required heatsinking for continuous 5 W operation. |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free thermosetting epoxy, UL94V-0), cathode indicated by colored band. Leads are tin-lead or RoHS-compliant matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage side in reverse-biased regulation | Connected to lower potential node; carries full regulated current during breakdown. |
| Cathode | Zener breakdown terminal / high-voltage side in regulation | Banded end; connected to higher potential node; establishes stable 60 V reference relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N53xxB series | Industry-standard footprint and electrical behavior ensuring design interchangeability and sourcing reliability. |
| 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) | Robust electrostatic discharge immunity - reduces risk of field failure in handling and board-level integration. |
| RoHS-compliant (e3 suffix) | Lead-free matte-tin plating meets environmental compliance without sacrificing solderability or reliability. |
| High surge current capability | 350 A peak (8.3 ms) enables effective transient suppression in unprotected input stages. |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Zener reference element providing precise 60 V clamp for TL431 bias network or direct shunt regulation. Use Value: Tight ±5% tolerance and low ΔVZ (2.2 V) ensure output regulation stability within ±1% over line/load/temperature. | Use Scenario: Provides stable excitation voltage for precision RTD or strain gauge bridge circuits in factory automation systems. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage reference source replacing higher-cost IC references where 60 V bias is required. Use Value: 0.5 μA IR at 45.5 V minimizes error contribution in high-impedance sensor interfaces. |
| Overvoltage Protection Clamp | Programmable Threshold Detector |
Use Scenario: Placed across DC bus rails in motor drives to clamp transients exceeding safe operating limits. IC Role / Device Role / Timing Role: Passive crowbar element conducting during overvoltage events to divert energy and protect downstream MOSFETs/IGBTs. Use Value: 350 A surge rating and 5 W steady-state dissipation enable repeated transient absorption without degradation. | Use Scenario: Integrated into comparator input stage to define precise 60 V trip point for battery management or UPS monitoring. IC Role / Device Role / Timing Role: Voltage threshold setting component establishing hysteresis-free trigger level for analog comparators. Use Value: 40 Ω ZZ ensures minimal threshold shift under varying source impedance, improving detection repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5371B (bulk) | Same electrical specs, identical 60 V ±5%, but supplied in bulk rather than tape-and-reel (TR8). | No reel packaging - unsuitable for automated SMT placement; requires manual or vibratory feed handling. | Select 1N5371/TR8 for pick-and-place compatibility; choose 1N5371B for hand-solder prototyping or low-volume repair. |
| SMBJ5371B | Surface-mount SMB package; same 60 V ±5% and 5 W rating, but thermal resistance is 60 °C/W (junction-to-ambient on FR4), not 25 °C/W. | Requires PCB layout change; lower surge current (200 A vs. 350 A); optimized for space-constrained designs. | Choose SMBJ5371B only when board area is critical and thermal derating is acceptable; retain 1N5371/TR8 for legacy through-hole or high-surge environments. |
Compared with 1N5371B and SMBJ5371B, the 1N5371/TR8 offers tape-and-reel delivery for automated assembly and superior thermal performance (25 °C/W) - critical for sustained 5 W operation in industrial power supplies where lead-frame heatsinking is leveraged.
Availability
1N5371/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, sensor signal conditioning, overvoltage protection circuits, and programmable threshold detection requiring stable component supply and JEDEC-standard axial Zener performance.
Supply support for 1N5371/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 for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal robustness, surge resilience, and long-term parametric stability under extended temperature cycling.
FAQ
What is the zener voltage tolerance of the 1N5371/TR8?
The 1N5371/TR8 has a zener voltage tolerance of ±5%, indicated by the "B" suffix in its full designation. This means its actual breakdown voltage falls between 57 V and 63 V at 20 mA test current and 25 °C lead temperature. The tolerance is guaranteed per JEDEC specification and verified during production screening.
Does the 1N5371/TR8 require dry packing before PCB assembly?
No, the 1N5371/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 ambient conditions without baking prior to reflow or wave soldering. This simplifies inventory handling and eliminates moisture-related popcorning risks.
What is the maximum surge current rating for the 1N5371/TR8?
The 1N5371/TR8 is rated for a maximum non-recurrent surge current (IZSM) of 350 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating applies under specified mounting conditions and enables effective transient suppression in DC bus protection applications without device failure.
How is polarity marked on the 1N5371/TR8?
The 1N5371/TR8 uses a cathode band marking - a single colored band near one end of the axial body. During normal Zener operation, this banded end must be held at a more positive potential than the opposite (anode) end. Reversing polarity subjects the device to forward conduction only, with VF ≤ 1.2 V at 1.0 A.
Is the 1N5371/TR8 RoHS compliant?
Yes, the 1N5371/TR8 is RoHS compliant, as confirmed by the "e3" suffix in its full manufacturer part number (1N5371B e3). Its leads are finished with annealed matte-tin plating meeting RoHS requirements, and its epoxy body complies with UL94V-0 flammability standards.
1N5371/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):
- 60 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 43 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
1N5371/TR8 FAQ
1.How can I place an order for 1N5371/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5371/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 1N5371/TR8 reliable?
The price and inventory of 1N5371/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5371/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5371/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5371/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5371/TR8?
1N5371/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5371/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 1N5371/TR8?
For technical support, including 1N5371/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5371/TR8 requirements.
6.How does Aetrix verify that 1N5371/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5371/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 1N5371/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5371/TR8?
All 1N5371/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5371/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 1N5371/TR8 part is unused and in its original packaging.
Return procedure for 1N5371/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5371/TR8 Tags
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