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Microchip Technology 1N5371A/TR8
- Part No.:
- 1N5371A/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5371A/TR8.pdf
- Description:
- DIODE ZENER 60V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,221
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Product details
Overview
1N5371A/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 60 V, ±10% tolerance (A suffix), 20 mA test current (IZT), 40 Ω dynamic impedance (ZZ), and 350 A surge current rating (IZSM). It operates from –65 °C to +150 °C and is used for primary voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5371A/TR8 datasheet, 1N5371A/TR8 pinout, 1N5371A/TR8 application, or 1N5371A/TR8 equivalent, this page delivers verified electrical specs, thermal derating behavior, JEDEC T-18 package details, and real-world selection guidance for discrete voltage regulation design.
Technical Context
This Zener operates in reverse-biased breakdown mode with a specified 60 V nominal Zener voltage at 20 mA test current (IZT), exhibiting 40 Ω dynamic impedance (ZZ) and 2.2 V maximum voltage regulation (ΔVZ) across 10–50% of IZM. Its 25 °C/W junction-to-lead thermal resistance enables stable 5 W dissipation when leads are mounted ≥10 mm from body.
The device features a void-free thermosetting epoxy case (UL94V-0), tin-lead or RoHS-compliant matte-tin plating, cathode band polarity marking, and moisture sensitivity level 1 - eliminating dry-pack requirements. It withstands 8.3 ms half-sine surge currents up to 350 A per JEDEC test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 60 V ±10% at 20 mA - defines nominal regulation point under standard test conditions |
| Power Dissipation (Pd) | 5.0 W at TL = 25 °C with 10 mm lead length - sets maximum continuous DC power handling with adequate heatsinking |
| Dynamic Impedance (ZZ) | 40 Ω at IZT = 20 mA - determines small-signal AC voltage variation under load transients |
| Surge Current (IZSM) | 350 A peak (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal design using lead conduction path, not PCB pads |
| Reverse Leakage (IR) | 0.5 μA max at VR = 45 V - ensures minimal standby current in high-impedance bias networks |
| Operating Temperature | –65 °C to +150 °C - qualifies for extended industrial and under-hood automotive environments |
Pinout & Package
Package: JEDEC T-18 axial-leaded plastic encapsulated case (void-free UL94V-0 epoxy), 0.7 g weight, cathode indicated by colored band. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to circuit ground or lower-potential rail during Zener operation |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to unregulated input; provides stable 60 V reference when reverse biased |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Guarantees standardized mechanical dimensions, marking, and test methodology across manufacturers |
| ±10% voltage tolerance (A suffix) | Enables cost-optimized regulation where tight reference accuracy is not required |
| Level 1 moisture sensitivity | Allows direct placement without baking or dry-pack - reduces manufacturing overhead |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during assembly and testing |
| High surge current capability (350 A) | Provides robust transient suppression in line-powered equipment without external crowbar circuits |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Primary shunt regulator in 72 VDC input industrial SMPS feedback loop. IC Role / Device Role / Timing Role: Zener diode providing precise 60 V reference to error amplifier input. Use Value: Maintains ±10% output regulation across line and load variations while dissipating up to 5 W continuously. |
Use Scenario: Clamp on 48 V telecom rectifier output to prevent damage during lightning-induced surges. IC Role / Device Role / Timing Role: Reverse-biased Zener absorbing transient energy above 60 V threshold. Use Value: Limits voltage excursion to ≤62.2 V (VZM) during 350 A 8.3 ms surges, protecting downstream MOSFETs and controllers. |
| Programmable Voltage Reference | Field-Serviceable Calibration Standard |
Use Scenario: Fixed reference node in analog sensor signal conditioning circuit for pressure transducers. IC Role / Device Role / Timing Role: Stable 60 V Zener establishing known bias point for op-amp gain-setting network. Use Value: Delivers <0.5 μA leakage at 45 V reverse bias, minimizing offset drift in high-impedance divider networks. |
Use Scenario: Replaceable calibration element in portable multimeter internal reference module. IC Role / Device Role / Timing Role: Field-swappable 60 V Zener used to verify and adjust meter full-scale accuracy. Use Value: JEDEC T-18 axial package allows hand-solder replacement; ±10% tolerance aligns with Class II handheld instrument specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5371B/TR8 | ±5% tolerance (B suffix) vs. ±10% (A suffix); same VZ, IZT, ZZ, and package | Required where tighter regulation stability is needed for precision feedback loops | Select 1N5371B/TR8 when reference accuracy outweighs cost sensitivity |
| MMBZ5257B-TP | Surface-mount SOD-123 package; 60 V ±5%, 0.2 W rating, 100 Ω ZZ - not power-compatible | Limited to low-power biasing; unsuitable for >100 mW continuous dissipation | Choose MMBZ5257B-TP only for space-constrained PCBs with sub-100 mW Zener loads |
Compared with 1N5371A/TR8, the 1N5371B/TR8 offers improved voltage accuracy at identical thermal and surge performance, while the MMBZ5257B-TP trades power capability for miniaturization - making it viable only in ultra-low-power signal-level applications.
Availability
1N5371A/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, telecom surge protection, programmable reference circuits, and field-serviceable calibration standards requiring stable component supply and long-lifecycle support.
Supply support for 1N5371A/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 1N53xxA/B series was designed for ruggedized discrete 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 1N5371A/TR8?
The 1N5371A/TR8 has a nominal Zener voltage of 60 V with a ±10% tolerance, as indicated by the "A" suffix per Microsemi's documentation. This means the actual measured VZ at 20 mA test current falls between 54 V and 66 V under standard conditions (TL = 25 °C). The tolerance directly impacts regulation accuracy in feedback and reference applications.
Can the 1N5371A/TR8 be used in surface-mount designs?
No - the 1N5371A/TR8 uses a JEDEC T-18 axial-leaded package and is not compatible with SMT assembly. For surface-mount equivalents, Microsemi offers the SMBJ5371A series in DO-214AA (SMB) package. The 1N5371A/TR8 requires through-hole mounting with ≥10 mm lead length from body for rated 5 W dissipation.
What is the maximum steady-state power dissipation for the 1N5371A/TR8 on a standard PCB?
When mounted on a FR4 board with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm traces, the 1N5371A/TR8 is rated for 1.47 W at TA = 25 °C. This derated value reflects its 85 °C/W junction-to-ambient thermal resistance - significantly lower than its 25 °C/W junction-to-lead rating, which applies only with proper lead heatsinking.
Does the 1N5371A/TR8 require dry-pack handling per J-STD-020?
No - the 1N5371A/TR8 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it is not hygroscopic and does not require dry-packaging or baking prior to reflow or wave soldering. This simplifies inventory management and eliminates moisture-related popcorning risks during assembly.
How is the voltage regulation (ΔVZ) defined for the 1N5371A/TR8?
Voltage regulation (ΔVZ) for the 1N5371A/TR8 is defined as the difference between the Zener voltage measured at 10% and 50% of its maximum Zener current (IZM), yielding a maximum value of 2.2 V. This parameter quantifies how tightly the 1N5371A/TR8 maintains regulation across its operational current range, critical for stable reference performance.
1N5371A/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:
- ±10%
- 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
1N5371A/TR8 FAQ
1.How can I place an order for 1N5371A/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5371A/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 1N5371A/TR8 reliable?
The price and inventory of 1N5371A/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5371A/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5371A/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5371A/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5371A/TR8?
1N5371A/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5371A/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 1N5371A/TR8?
For technical support, including 1N5371A/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5371A/TR8 requirements.
6.How does Aetrix verify that 1N5371A/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5371A/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 1N5371A/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5371A/TR8?
All 1N5371A/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5371A/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 1N5371A/TR8 part is unused and in its original packaging.
Return procedure for 1N5371A/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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