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Microchip Technology 1N5371BE3/TR12
- Part No.:
- 1N5371BE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5371BE3/TR12.pdf
- Description:
- DIODE ZENER 60V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,265
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Product details
Overview
1N5371BE3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation 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 operates from –65°C to +150°C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5371BE3/TR12 datasheet, 1N5371BE3/TR12 pinout, 1N5371BE3/TR12 application, or 1N5371BE3/TR12 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 per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown, maintaining stable output voltage across a broad current range (20 mA test point up to 79 mA max regulated current). Its low dynamic impedance (40 Ω) and tight voltage regulation (2.2 V between 10% and 50% of IZM) support stable reference performance under varying load conditions.
The 1N5371BE3/TR12 uses a void-free thermosetting epoxy T-18 package with cathode band marking, rated for 5 W steady-state dissipation at 25°C lead temperature and derated linearly above that. It meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity and withstands 260°C soldering for 10 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 60 V ±5% - precise regulation point for feedback networks requiring stable mid-range voltage reference |
| Power Dissipation (PD) | 5.0 W at TL = 25°C - supports high-current regulation when mounted with ≥10 mm lead length heat sinking |
| Test Current (IZT) | 20 mA - standardized bias point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 40 Ω at IZT - low AC impedance ensures minimal voltage shift under dynamic load transients |
| Max Reverse Current (IR) | 0.5 μA at VR = 45.5 V - confirms sharp knee and low leakage below regulation threshold |
| Surge Current (IZSM) | 350 A (8.3 ms half-sine) - enables robust transient suppression in surge-prone power rails |
| Voltage Regulation (ΔVZ) | 2.2 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by color band. Leads are annealed matte-tin plated per MIL-STD-750 Method 2026, RoHS compliant (e3 suffix), weight 0.7 g.
| 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 VZ |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener series | Ensures industry-standard mechanical and electrical compatibility across manufacturers |
| ±5% voltage tolerance (B suffix) | Enables predictable regulation without post-production trimming in cost-sensitive designs |
| 25 °C/W junction-to-lead thermal resistance | Allows 5 W operation with simple lead-length heat sinking-no PCB copper pour required |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and bake-out prior to assembly, reducing manufacturing overhead |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and ESD protection circuitry in final systems |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp for DC Bus |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference establishing error amplifier setpoint. Use Value: 60 V Zener voltage matches typical auxiliary winding outputs; ±5% tolerance ensures <±1% output regulation after compensation. | Use Scenario: Protects 48 V telecom rectifier outputs from transient overvoltage events exceeding 70 V. IC Role / Device Role / Timing Role: Shunt clamping element diverting excess energy during surge conditions. Use Value: 350 A surge rating absorbs 8.3 ms line surges without failure; 2.2 V ΔVZ limits clamping variation across operating current. |
| Programmable Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Provides stable excitation voltage for resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Fixed-voltage source referenced to system ground with low tempco drift. Use Value: 40 Ω ZZ minimizes loading-induced error; –65°C to +150°C operating range supports extended industrial environments. | Use Scenario: Supplies regulated bias to 4–20 mA transmitter front-end circuits in hazardous-area instrumentation. IC Role / Device Role / Timing Role: Isolated voltage reference enabling loop-powered sensor signal conditioning. Use Value: 0.5 μA IR at 45.5 V ensures negligible quiescent current draw, preserving loop power budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5371B (non-e3, non-TR) | Same electrical specs but SnPb lead finish and bulk packaging; not RoHS compliant | Restricted to legacy or non-RoHS production; no tape-and-reel convenience | Select only if RoHS exemption applies and reel feeding is unnecessary |
| MMSZ5255B-TP (Micro Commercial) | Surface-mount SOD-123 package; 60 V ±5%, 500 mW rating; higher ZZ (150 Ω) | Not drop-in compatible; limited to low-power applications; unsuitable for 5 W dissipation | Choose only for space-constrained PCBs where power demand ≤0.5 W |
Compared with 1N5371B and MMSZ5255B-TP, the 1N5371BE3/TR12 uniquely combines 5 W power handling, axial-leaded through-hole mounting, RoHS compliance, and tape-and-reel delivery-making it optimal for high-reliability industrial power supplies requiring field-serviceable components.
Availability
1N5371BE3/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable voltage references requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5371BE3/TR12 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 1N53xxB series was designed for ruggedized voltage regulation in harsh-environment power systems-emphasizing thermal robustness, surge resilience, and long-term stability over wide temperature ranges.
FAQ
What is the Zener voltage tolerance of the 1N5371BE3/TR12?
The 1N5371BE3/TR12 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its part number. This means its actual regulation voltage falls within 57.0 V to 63.0 V at 20 mA test current and 25°C lead temperature. The tolerance is guaranteed per JEDEC specification and verified during production testing-not derived from datasheet interpolation or family-level assumptions.
Does the 1N5371BE3/TR12 require a heatsink for 5 W operation?
The 1N5371BE3/TR12 achieves its full 5 W power rating when the lead temperature (TL) is maintained at 25°C, which requires ≥10 mm (3/8 inch) of bare lead length extending from the epoxy body to act as a thermal path. No external heatsink is needed if this lead-length condition is met; however, PCB-mounted operation on FR4 reduces rated power to 1.47 W due to higher junction-to-ambient thermal resistance (85 °C/W).
What does the "e3" and "TR12" suffix mean in 1N5371BE3/TR12?
The "e3" suffix indicates RoHS-compliant matte-tin plating per MIL-STD-750 Method 2026, replacing traditional tin-lead finishes. The "TR12" denotes tape-and-reel packaging per EIA-296 standard, with 12-inch reels containing 1,000 units-enabling automated pick-and-place assembly. Both suffixes are integral to the official Microsemi orderable part number and define material compliance and packaging format.
Can the 1N5371BE3/TR12 be used in place of the 1N5371B without design changes?
Yes-the 1N5371BE3/TR12 is a direct replacement for the 1N5371B in terms of electrical performance, thermal behavior, and mechanical dimensions. The only differences are RoHS-compliant plating (e3) and tape-and-reel packaging (TR12); the Zener voltage, power rating, impedance, and temperature range remain identical. No PCB layout or schematic modifications are required.
What is the maximum surge current rating for the 1N5371BE3/TR12?
The 1N5371BE3/TR12 has a maximum non-recurrent surge current (IZSM) of 350 A, specified for an 8.3 ms half-sine waveform. This rating reflects its capability to absorb transient energy without degradation, validated per Microsemi's test methodology and documented in the official 1N5333B–1N5388B datasheet revision D. It is not a calculated or extrapolated value.
1N5371BE3/TR12 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:
- ±5%
- 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
1N5371BE3/TR12 FAQ
1.How can I place an order for 1N5371BE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5371BE3/TR12 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 1N5371BE3/TR12 reliable?
The price and inventory of 1N5371BE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5371BE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5371BE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5371BE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5371BE3/TR12?
1N5371BE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5371BE3/TR12 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 1N5371BE3/TR12?
For technical support, including 1N5371BE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5371BE3/TR12 requirements.
6.How does Aetrix verify that 1N5371BE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5371BE3/TR12 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 1N5371BE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5371BE3/TR12?
All 1N5371BE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5371BE3/TR12, 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 1N5371BE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5371BE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5371BE3/TR12 Tags
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