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Microchip Technology 1N5371CE3/TR12
- Part No.:
- 1N5371CE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5371CE3/TR12.pdf
- Description:
- DIODE ZENER 60V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,148
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Product details
Overview
1N5371CE3/TR12 from Microsemi is a 5.0 W axial-leaded silicon Zener diode with a nominal regulation voltage of 60 V, ±2% tolerance (C 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 1N5371CE3/TR12 datasheet, 1N5371CE3/TR12 pinout, 1N5371CE3/TR12 application, or 1N5371CE3/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), steady-state power derating, reverse leakage at VR = 45 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 mode. Its 60 V nominal Zener voltage is specified at 20 mA test current (IZT) with ±2% tolerance, and it maintains regulation across 10%–50% of IZM (350 mA), yielding ≤2.2 V voltage regulation (ΔVZ). The low 25 °C/W junction-to-lead thermal resistance enables stable operation at full 5 W dissipation when leads are held at ≤25 °C (3/8″ from body).
It features a void-free UL94V-0 thermosetting epoxy case, cathode band polarity marking, and RoHS-compliant annealed matte-tin plating. Reverse leakage is limited to 0.5 μA at 45 V (VR), and forward voltage is ≤1.2 V at 1.0 A, supporting bidirectional transient suppression when paired with complementary devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 60 V ±2% at 20 mA - ensures tight reference stability for feedback loops in regulated DC-DC converters |
| Power Dissipation (PD) | 5.0 W at TL = 25 °C - supports high-energy clamping without external heatsink when lead temperature is controlled |
| Dynamic Impedance (ZZ) | 40 Ω max at IZT = 20 mA - minimizes output voltage variation under load transients |
| Surge Current (IZSM) | 350 A (8.3 ms half-sine) - withstands lightning-induced surges in telecom and industrial AC line protection |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - allows direct thermal path to PCB copper or chassis via lead termination |
| Reverse Leakage (IR) | 0.5 μA max at VR = 45 V - ensures minimal quiescent current in high-impedance bias networks |
| Operating Temperature | –65 °C to +150 °C - qualified for under-hood automotive and downhole industrial environments |
Pinout & Package
Package: Axial-leaded T-18 molded epoxy case (JEDEC DO-201AD), 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 | Non-banded lead | Connected to lower-potential node; reverse-biased during regulation; carries full Zener current |
| Cathode | Banded lead | Connected to higher-potential node; defines regulated output voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables use in precision reference circuits without post-manufacture trimming |
| RoHS-compliant e3 suffix | Meets EU Directive 2011/65/EU with matte-tin plating and halogen-free epoxy |
| Level 1 moisture sensitivity (J-STD-020B) | Eliminates dry-pack requirement and floor-life constraints for SMT reflow compatibility |
| 25 °C/W junction-to-lead thermal resistance | Permits full 5 W operation with simple lead-mounting on copper-clad PCBs or metal chassis |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ionized air or grounded workstations |
Applications
| Industrial Power Supply Regulation | Telecom Line Surge Protection |
|---|---|
|
Use Scenario: Primary-side overvoltage clamp in 48 V telecom rectifier modules exposed to AC line surges and lightning transients. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing transient energy above 60 V while holding downstream circuitry within safe operating limits. Use Value: 350 A surge rating and 5 W steady-state dissipation enable single-device protection without parallel stacking or active crowbar circuits. |
Use Scenario: Secondary-side voltage reference in isolated flyback converters for industrial PLC I/O modules. IC Role / Device Role / Timing Role: Precision 60 V reference source for optocoupler feedback biasing, stabilizing output regulation across temperature and load. Use Value: ±2% tolerance and low ΔVZ (≤2.2 V) ensure <±1% output voltage drift over 0–100% load range. |
| Automotive Battery Monitoring | Test Equipment Reference Calibration |
|
Use Scenario: Overvoltage detection in 24 V vehicle battery management systems where supply may reach 36 V during load dump. IC Role / Device Role / Timing Role: Clamping element in discrete comparator input stage, triggering shutdown when battery exceeds safe threshold. Use Value: Stable 60 V Zener point and –65 °C to +150 °C operation support reliable detection across extreme ambient conditions. |
Use Scenario: Calibration reference in portable multimeters and benchtop power supplies requiring traceable voltage standards. IC Role / Device Role / Timing Role: Stable, low-drift voltage node used to adjust internal DAC offsets and verify ADC linearity. Use Value: Tight 2% tolerance and low 40 Ω dynamic impedance minimize calibration uncertainty and improve measurement 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 | Same 60 V nominal voltage but ±5% tolerance (B suffix); otherwise identical electrical specs and package | Acceptable where tighter tolerance not required; lower cost for non-critical biasing | Select 1N5371B if system-level tolerance budget allows ±5% variation in reference voltage |
| MMSZ5257ET1G | Surface-mount SOD-123 package; 60 V ±5%; 500 mW rating; 10x lower power and surge capability | Only suitable for low-power signal-level references, not power rail clamping | Choose MMSZ5257ET1G only for space-constrained PCBs where 5 W dissipation is unnecessary |
Compared with 1N5371B and MMSZ5257ET1G, the 1N5371CE3/TR12 delivers superior thermal performance (25 °C/W vs. >300 °C/W for SOD-123), higher surge robustness (350 A vs. <10 A), and tighter voltage control-making it the sole choice for industrial-grade 5 W Zener regulation.
Availability
1N5371CE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, telecom surge protectors, and automotive battery monitors requiring stable component supply, long-lifecycle availability, and RoHS-compliant sourcing.
Supply support for 1N5371CE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized 5 W Zener regulation in harsh-environment applications, emphasizing thermal robustness, surge immunity, and extended temperature operation.
FAQ
What is the Zener voltage tolerance of the 1N5371CE3/TR12?
The 1N5371CE3/TR12 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its measured VZ at 20 mA test current falls between 58.8 V and 61.2 V at 25 °C. This tighter tolerance supports precision voltage reference designs where ±5% (B suffix) would introduce unacceptable error.
How does the 1N5371CE3/TR12 handle thermal dissipation in PCB-mounted applications?
The 1N5371CE3/TR12 achieves 25 °C/W junction-to-lead thermal resistance when leads are held at ≤25 °C (3/8″ from body), enabling full 5 W operation. When mounted on FR4 with 4 mm² copper pads, its junction-to-ambient resistance rises to 85 °C/W, limiting steady-state power to 1.47 W unless additional heatsinking is applied to the leads.
Is the 1N5371CE3/TR12 suitable for surge protection in telecom equipment?
Yes-the 1N5371CE3/TR12 is rated for 350 A peak surge current (8.3 ms half-sine wave), making it appropriate for primary-side surge suppression in telecom rectifiers and DSL line cards. Its 60 V clamping voltage aligns with ITU-T K.20 and GR-1089-CORE requirements for Class B/C protection circuits.
What does the "e3" and "TR12" suffix indicate in 1N5371CE3/TR12?
The "e3" suffix confirms RoHS compliance with matte-tin plating and halogen-free epoxy encapsulation. The "TR12" indicates tape-and-reel packaging per EIA-296 standard, with 12,000 units per reel-optimized for automated SMT placement despite its axial-leaded form factor.
Can the 1N5371CE3/TR12 be used as a replacement for the 1N5371B in existing designs?
Yes-the 1N5371CE3/TR12 is a direct functional replacement for the 1N5371B, sharing identical package, pinout, thermal characteristics, and 60 V nominal Zener voltage. The only difference is tighter ±2% tolerance (vs. ±5% for B suffix), which improves reference accuracy without requiring layout or thermal changes.
1N5371CE3/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:
- ±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
1N5371CE3/TR12 FAQ
1.How can I place an order for 1N5371CE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5371CE3/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 1N5371CE3/TR12 reliable?
The price and inventory of 1N5371CE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5371CE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5371CE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5371CE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5371CE3/TR12?
1N5371CE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5371CE3/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 1N5371CE3/TR12?
For technical support, including 1N5371CE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5371CE3/TR12 requirements.
6.How does Aetrix verify that 1N5371CE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5371CE3/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 1N5371CE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5371CE3/TR12?
All 1N5371CE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5371CE3/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 1N5371CE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5371CE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5371CE3/TR12 Tags
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BZT52C5V6T-7
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MM5Z5V1ST1G
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