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Microchip Technology 1N5371C/TR8
- Part No.:
- 1N5371C/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5371C/TR8.pdf
- Description:
- DIODE ZENER 60V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,421
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Product details
Overview
1N5371C/TR8 from Microsemi is a 5 W, 60 V ±2% tolerance axial-leaded silicon Zener diode designed for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation. It operates from -65°C to +150°C, delivers 20 mA test current (IZT), and exhibits 40 Ω dynamic impedance (ZZ) at IZT.
For engineers reviewing the 1N5371C/TR8 datasheet, 1N5371C/TR8 pinout, 1N5371C/TR8 application, or 1N5371C/TR8 equivalent, key selection criteria include its ±2% voltage tolerance, 60 V nominal Zener voltage, 5 W steady-state power rating at TL < 25°C, and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
The 1N5371C/TR8 functions as a two-terminal voltage reference device operating in reverse breakdown mode. Its regulation performance is defined by measured Zener voltage (VZ = 60 V) at 20 mA, dynamic impedance (ZZ = 40 Ω), and voltage regulation (ΔVZ = 2.2 V) between 10% and 50% of maximum Zener current.
It features low thermal resistance (25 °C/W junction-to-lead at 10 mm lead length), enabling stable operation under high DC current with adequate heat sinking. The device is moisture-sensitive Level 1 per J-STD-020B and requires no dry pack.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 60 V ±2% - precise reference voltage at 20 mA test current, suitable for tight-regulation feedback paths |
| Power Dissipation (Pd) | 5.0 W at TL < 25°C - supports robust continuous regulation when leads are adequately heat-sunk |
| Test Current (IZT) | 20 mA - standardized operating point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 40 Ω - low AC impedance ensures minimal output voltage variation under load transients |
| Max Reverse Current (IR) | 0.5 μA at VR = 45.6 V - confirms sharp knee and low leakage below breakdown threshold |
| Surge Current (IZSM) | 350 A (8.3 ms half-sine) - withstands transient overvoltage events without degradation |
| Voltage Regulation (ΔVZ) | 2.2 V - difference between VZ at 10% and 50% of IZM, quantifying regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic encapsulated case (void-free UL94V-0 epoxy), cathode indicated by 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 | Reference ground node | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Regulated output node | Banded end; supplies stable 60 V reference when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables high-accuracy regulation without external trimming in feedback networks |
| 5 W power rating with 25 °C/W thermal resistance | Allows direct mounting on PCB with 10 mm lead length for thermal management without heatsink |
| Moisture sensitivity Level 1 (J-STD-020B) | Eliminates dry-pack requirement and floor-life constraints for SMT assembly prep |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-protected workstations |
| RoHS-compliant (e3 suffix) | Meets global environmental compliance requirements without performance trade-offs |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in the optocoupler feedback path of isolated DC-DC converters to regulate output voltage within ±2%. IC Role / Device Role / Timing Role: Precision voltage reference providing error signal to PWM controller via optocoupler. Use Value: Tight 60 V tolerance ensures consistent regulation across production units without calibration. |
Use Scenario: Placed across sensitive input rails to clamp transient spikes exceeding 60 V. IC Role / Device Role / Timing Role: Passive overvoltage clamp absorbing surge energy up to 350 A (8.3 ms). Use Value: Low ΔVZ (2.2 V) guarantees predictable clamping threshold during fast transients. |
| Programmable Reference Generator | Industrial Sensor Excitation |
Use Scenario: Combined with resistive dividers to generate stable sub-60 V references for ADC biasing. IC Role / Device Role / Timing Role: Primary voltage reference source in analog front-end design. Use Value: 40 Ω ZZ minimizes divider loading error and improves temperature stability. |
Use Scenario: Supplies regulated excitation voltage to bridge-based pressure/strain sensors in harsh environments. IC Role / Device Role / Timing Role: Stable excitation source maintaining sensor linearity and offset accuracy. Use Value: -65°C to +150°C operating range supports deployment in engine control or downhole equipment. |
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% VZ tolerance (vs. ±2% for 1N5371C/TR8); identical VZ, IZT, ZZ, and package | Suitable where tighter regulation is not required; lower cost in high-volume production | Select 1N5371B/TR8 when system-level calibration compensates for wider tolerance. |
| MMSZ5257ET1G | Surface-mount SOD-123 package; 60 V ±5%, 500 mW rating (vs. 5 W axial); higher ZZ (~120 Ω) | Limited to low-power, space-constrained designs; cannot replace 1N5371C/TR8 in high-current regulation | Choose MMSZ5257ET1G only for board area–limited applications with <100 mA load current. |
Compared with 1N5371B/TR8, the 1N5371C/TR8 provides tighter voltage control critical for uncalibrated systems; versus MMSZ5257ET1G, it delivers 10× higher power handling and lower impedance but requires axial through-hole mounting.
Availability
1N5371C/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial overvoltage protection circuits, and programmable reference generator designs requiring stable component supply and long-term obsolescence support.
Supply support for 1N5371C/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 1N5371C/TR8 belongs to Microsemi's legacy 1N53xxB series of 5 W axial Zener diodes, engineered for ruggedized voltage regulation in mission-critical power and protection circuits.
FAQ
What is the Zener voltage tolerance of the 1N5371C/TR8?
The 1N5371C/TR8 has a Zener voltage tolerance of ±2%, as indicated by the "C" suffix in its part number. This is confirmed in the manufacturer's datasheet footnote specifying C suffix = ±2% tolerance. The nominal Zener voltage is 60 V, meaning the actual VZ falls between 58.8 V and 61.2 V at 20 mA test current. This tight tolerance makes the 1N5371C/TR8 suitable for applications demanding high initial accuracy without post-production calibration.
What is the maximum steady-state power dissipation for the 1N5371C/TR8?
The 1N5371C/TR8 is rated for 5.0 W steady-state power dissipation when lead temperature (TL) is maintained below 25°C, measured at 10 mm (3/8 inch) from the body. When mounted on an FR4 PCB with specified copper pads and traces, its derated power drops to 1.47 W at 25°C ambient. This thermal behavior is documented in the "Maximum Ratings" section of the Microsemi datasheet and directly impacts heatsinking requirements in high-current applications using the 1N5371C/TR8.
Does the 1N5371C/TR8 have RoHS compliance?
Yes, the 1N5371C/TR8 is RoHS compliant, as indicated by the "e3" suffix in its full ordering designation (1N5371C/TR8 e3). The device uses RoHS-compliant annealed matte-tin plating on its leads and meets the environmental requirements defined in Directive 2011/65/EU. This compliance is explicitly stated in the "Features" section of the Microsemi datasheet and verified in the mechanical packaging description.
What is the dynamic impedance (ZZ) of the 1N5371C/TR8 and why does it matter?
The dynamic impedance (ZZ) of the 1N5371C/TR8 is 40 Ω, measured at 20 mA test current (IZT) with 1 kHz AC modulation. This parameter quantifies how much the Zener voltage changes under small-signal AC load variations. A lower ZZ-like the 40 Ω value of the 1N5371C/TR8-means superior regulation stability and reduced output ripple in voltage reference or feedback applications, directly impacting system accuracy when the 1N5371C/TR8 is used in precision circuits.
How is polarity marked on the 1N5371C/TR8?
The 1N5371C/TR8 uses a cathode band to indicate polarity: the banded end is the cathode and must be held at a higher potential than the anode to operate in reverse breakdown. This marking is consistent across the entire 1N53xxB family and is specified in the "Mechanical and Packaging" section of the datasheet. Correct orientation is essential-reversing the 1N5371C/TR8 will result in forward conduction (~1.2 V drop) rather than Zener regulation.
1N5371C/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:
- ±2%
- 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
1N5371C/TR8 FAQ
1.How can I place an order for 1N5371C/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5371C/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 1N5371C/TR8 reliable?
The price and inventory of 1N5371C/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5371C/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5371C/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5371C/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5371C/TR8?
1N5371C/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5371C/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 1N5371C/TR8?
For technical support, including 1N5371C/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5371C/TR8 requirements.
6.How does Aetrix verify that 1N5371C/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5371C/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 1N5371C/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5371C/TR8?
All 1N5371C/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5371C/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 1N5371C/TR8 part is unused and in its original packaging.
Return procedure for 1N5371C/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5371C/TR8 Tags
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