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Microchip Technology 1N5371B/TR12
- Part No.:
- 1N5371B/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5371B/TR12.pdf
- Description:
- DIODE ZENER 60V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:7,372
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Product details
Overview
1N5371B/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 maximum dynamic impedance at IZT, and 350 A peak surge current rating. It operates from −65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5371B/TR12 datasheet, 1N5371B/TR12 pinout, 1N5371B/TR12 application, or 1N5371B/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), steady-state power derating on FR4, reverse leakage at VR = 45.5 V, and compliance with MIL-PRF-19500 screening options.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown. Its Zener voltage is specified at 25 °C lead temperature with 40 ms DC measurement delay, and its dynamic impedance is measured using 1 kHz AC modulation at 10% of IZT.
Voltage regulation (ΔVZ) is defined as the difference between voltages measured at 10% and 50% of IZM (122 mA), yielding 2.2 V max. The diode exhibits 0.5 μA max reverse current at VR = 45.5 V and maintains stable regulation across wide current (122 mA max IZM) and temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 60 V ±5% - precise regulation point for 56–64 V range under IZT = 20 mA |
| Power Dissipation (PD) | 5.0 W at TL = 25 °C - requires ≥10 mm lead length from body for full rating |
| Dynamic Impedance (ZZ) | 40 Ω max at IZT = 20 mA - low impedance ensures minimal voltage shift with load current changes |
| Max Reverse Current (IR) | 0.5 μA at VR = 45.5 V - enables low-power standby regulation with negligible quiescent loss |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - supports high continuous current with simple heatsinking via leads |
| Surge Current (IZSM) | 350 A (8.3 ms half-sine) - withstands transient overvoltage events without degradation |
| Voltage Regulation (ΔVZ) | 2.2 V max - tight regulation across 12.2–61 mA operating range (10–50% of IZM) |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by band; leads are tin-lead or RoHS-compliant matte tin, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lower-potential rail; carries full Zener current during regulation |
| Cathode (banded end) | Regulated output node | Provides stable 60 V output when reverse-biased; polarity must be observed to avoid forward conduction |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions, marking, and electrical test conditions across global supply chain |
| Moisture sensitivity Level 1 | No dry pack required - simplifies handling, storage, and assembly logistics for production environments |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD controls during board assembly or field service |
| RoHS-compliant option (e3 suffix) | Meets environmental compliance requirements without performance trade-offs or requalification |
| MIL-PRF-19500 screening available | Supports high-reliability applications via MQ/MX/MV prefixes for JAN/JANTX/JANTXV qualification levels |
Applications
| Industrial Power Supply Reference | Overvoltage Clamp for DC Bus |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated 48 V telecom rectifier modules. IC Role / Device Role / Timing Role: Precision shunt reference providing error signal to PWM controller. Use Value: Maintains ±0.5% output regulation over line/load/temperature with 40 Ω ZZ and 2.2 V ΔVZ. | Use Scenario: Protecting 60 V-rated motor drive gate drivers from bus transients. IC Role / Device Role / Timing Role: Fast-acting crowbar clamping element triggered above 64 V. Use Value: Absorbs 350 A surge (8.3 ms) without failure, limiting voltage to ≤66 V during fault. |
| Programmable Voltage Monitor Threshold | Calibrated Sensor Excitation Source |
Use Scenario: Setting trip point for undervoltage lockout in battery management systems. IC Role / Device Role / Timing Role: Stable reference input to comparator with hysteresis. Use Value: Enables accurate 60 V threshold detection with <0.5 μA leakage ensuring low bias current error. | Use Scenario: Supplying excitation voltage to strain gauge bridges in test equipment. IC Role / Device Role / Timing Role: Low-noise, constant-voltage source for ratiometric measurements. Use Value: Delivers stable 60 V with 25 °C/W RθJL enabling direct lead-mount heatsinking for long-term drift control. |
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-TR12) | Same electrical specs; differs only in packaging - bulk vs. tape-and-reel (TR12 = 12,000 pcs/reel) | No functional difference; TR12 enables automated SMT placement; bulk suits manual/hand-solder prototyping | Select 1N5371B/TR12 for high-volume PCB assembly; choose bulk 1N5371B for evaluation or low-run builds |
| MMBZ5255B (SOT-23) | Surface-mount, 0.5 W rating, 60 V ±5%, but only 20 mA IZM; higher ZZ (70 Ω) and lower surge capability (10 A) | Suitable for space-constrained low-power circuits; not viable for 5 W thermal loads or surge protection | Choose MMBZ5255B only where board area is critical and power dissipation remains <0.5 W |
Compared with 1N5371B/TR12, the bulk version offers identical regulation performance with manual handling flexibility, while MMBZ5255B trades power handling and surge robustness for miniaturization - making 1N5371B/TR12 the sole choice for 5 W axial Zener applications requiring industrial-grade reliability.
Availability
1N5371B/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, DC bus protection circuits, and programmable voltage monitoring systems requiring stable component supply and long-term lifecycle support.
Supply support for 1N5371B/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal stability, surge resilience, and JEDEC-standardized manufacturability.
FAQ
What is the Zener voltage tolerance of the 1N5371B/TR12?
The 1N5371B/TR12 has a nominal Zener voltage of 60 V with a tolerance of ±5%, as indicated by the "B" suffix per Microsemi's documentation. This means the actual VZ falls within 57–63 V at 25 °C lead temperature and 20 mA test current. The tolerance is guaranteed across the full operating temperature range of −65 °C to +150 °C, and applies to all units bearing the B suffix in the 1N5333B–1N5388B family.
Can the 1N5371B/TR12 be used in surface-mount designs?
No, the 1N5371B/TR12 is an axial-leaded T-18 package device and is not compatible with surface-mount assembly. It requires through-hole mounting with ≥10 mm lead length from the body for full 5 W power rating. For SMT equivalents, Microsemi offers the SMBJ5371B (DO-214AA) and SMBG5371B (DO-214AB), both rated for 5 W and sharing identical electrical specifications with the 1N5371B/TR12.
What is the maximum steady-state current the 1N5371B/TR12 can handle at room temperature?
The 1N5371B/TR12 supports a maximum Zener current (IZM) of 122 mA at 25 °C lead temperature, calculated from P = 5 W and VZ = 60 V. This assumes adequate heat sinking via the leads - specifically, a 3/8 inch (10 mm) lead length from the body. On a standard FR4 PCB with 1 oz copper, its steady-state rating drops to 1.47 W, limiting usable current to ~24.5 mA without additional heatsinking.
Does the 1N5371B/TR12 meet RoHS requirements?
Yes, the 1N5371B/TR12 is RoHS compliant when ordered with the "e3" suffix (e.g., 1N5371B/TR12 e3). The base part number without e3 uses traditional tin-lead plating; however, RoHS-compliant matte-tin plating is available per MIL-STD-750 Method 2026 and is explicitly noted in the datasheet's "TERMINALS" section. Always verify the presence of the e3 suffix on the order and packaging label.
How is the voltage regulation (ΔVZ) of the 1N5371B/TR12 measured?
Voltage regulation (ΔVZ) for the 1N5371B/TR12 is defined as the difference between the Zener voltage measured at 10% and 50% of IZM (i.e., 12.2 mA and 61 mA), resulting in a maximum value of 2.2 V. This parameter quantifies how tightly the device maintains its regulation voltage across its operational current range and is distinct from dynamic impedance (ZZ), which is measured using small-signal AC modulation.
1N5371B/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
1N5371B/TR12 FAQ
1.How can I place an order for 1N5371B/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5371B/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 1N5371B/TR12 reliable?
The price and inventory of 1N5371B/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5371B/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5371B/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5371B/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5371B/TR12?
1N5371B/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5371B/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 1N5371B/TR12?
For technical support, including 1N5371B/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5371B/TR12 requirements.
6.How does Aetrix verify that 1N5371B/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5371B/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 1N5371B/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5371B/TR12?
All 1N5371B/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5371B/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 1N5371B/TR12 part is unused and in its original packaging.
Return procedure for 1N5371B/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5371B/TR12 Tags
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MM5Z5V1ST1G
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