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Microchip Technology 1N5368BE3/TR12
- Part No.:
- 1N5368BE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5368BE3/TR12.pdf
- Description:
- DIODE ZENER 47V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,879
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Product details
Overview
1N5368BE3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 47 V, ±5% tolerance (B suffix), 25 Ω maximum dynamic impedance at 25 mA test current, and 210 mA maximum Zener current when adequately heat-sunk. 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 1N5368BE3/TR12 datasheet, 1N5368BE3/TR12 pinout, 1N5368BE3/TR12 application, or 1N5368BE3/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (210 A), reverse leakage specification (0.5 µA at 35.8 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 Zener voltage is specified at 25 °C with 40 ±10 ms measurement delay after DC current application, and its dynamic impedance is measured using 1 kHz AC modulation at 10% of DC test current.
The 1N5368BE3/TR12 exhibits minimal voltage variation versus current (ΔVZ = 2.7 V between 10% and 50% of IZM) and maintains stable regulation across –65°C to +150°C ambient range. Its thermal design relies on 3/8″ (10 mm) lead length from body for junction-to-lead thermal resistance of 25 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±5% - precise regulation point for 45–49 V reference applications |
| Test Current (IZT) | 25 mA - standard bias point for specifying VZ and ZZ |
| Dynamic Impedance (ZZ) | 25 Ω max - low AC impedance ensures stable output under varying load |
| Max Reverse Leakage (IR) | 0.5 µA at 35.8 V - enables low-power standby operation without significant quiescent loss |
| Max Zener Current (IZM) | 210 mA at TL = 25°C - defines absolute safe DC operating limit with proper heatsinking |
| Surge Current (IZSM) | 210 A (8.3 ms half-sine) - supports transient overvoltage clamping in surge protection circuits |
| Voltage Regulation (ΔVZ) | 2.7 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case with void-free UL94V-0 epoxy body; cathode indicated by band; RoHS-compliant matte-tin plated leads solderable per MIL-STD-750 Method 2026; weight 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to circuit ground or lower potential node; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener breakdown terminal | Banded end; must be held at higher potential than anode to activate regulation; primary connection for regulated output node |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 5 W Zener | Industry-standard footprint and reliability for high-power voltage regulation |
| ±5% voltage tolerance (B suffix) | Enables tighter system-level voltage margining vs. ±10% or ±20% variants |
| Moisture sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Robust handling in manufacturing without special ESD controls |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU with annealed matte-tin plating, no lead or hazardous substances |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stable 47 V reference in isolated DC-DC converter feedback loop for telecom power modules. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference providing error signal to optocoupler-driven PWM controller. Use Value: Maintains ±0.5% output regulation over temperature and line variations due to tight 47 V ±5% tolerance and low ΔVZ. | Use Scenario: Clamping transient spikes on 48 V DC bus in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Shunt protector diverting surge energy above 47 V to ground during lightning-induced transients. Use Value: Withstands 210 A non-repetitive surge (8.3 ms) without degradation, preserving downstream MOSFET gate drivers. |
| Programmable Voltage Monitor Threshold | Linear Regulator Pre-regulation |
Use Scenario: Setting trip point for undervoltage/overvoltage detection in battery management systems for 48 V LiFePO4 packs. IC Role / Device Role / Timing Role: Precision threshold element feeding comparator input in discrete monitoring circuit. Use Value: Low 0.5 µA leakage at 35.8 V ensures negligible current draw in always-on monitoring state. | Use Scenario: Pre-regulating unregulated 60 V supply down to 47 V before LDO stage in medical imaging sensor bias rails. IC Role / Device Role / Timing Role: Passive shunt regulator dissipating excess power to stabilize intermediate rail. Use Value: 5 W power rating and 25 °C/W thermal resistance allow continuous operation at 210 mA with minimal heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5368B (non-e3, non-TR) | Same electrical specs but SnPb plating and bulk packaging; not RoHS-compliant | Restricted to legacy military/aerospace programs requiring Pb-based solder compatibility | Select only if Pb-containing assembly process is mandated and RoHS exemption applies |
| SMBJ5368B | Surface-mount SMB package; identical 47 V ±5% spec but 1.47 W steady-state power at TA = 25°C | Used where board space is constrained and thermal path to PCB copper is optimized | Choose for automated SMT lines; verify thermal pad layout meets 4 mm² copper requirement |
Compared with 1N5368BE3/TR12, the 1N5368B lacks RoHS compliance and tape-and-reel convenience, while SMBJ5368B trades axial mounting flexibility and 5 W dissipation capability for compactness and reflow compatibility - neither is pin-compatible due to differing form factors.
Availability
1N5368BE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, programmable voltage monitors, and linear regulator pre-regulation stages requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5368BE3/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 robust, high-power voltage regulation in harsh-environment power systems where stability, surge resilience, and long-term parametric consistency are critical.
FAQ
What is the Zener voltage tolerance of the 1N5368BE3/TR12?
The 1N5368BE3/TR12 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its part number. This means its nominal 47 V regulation point falls within 44.65 V to 49.35 V at 25 °C with 25 mA test current. The tolerance remains valid across the full operating temperature range of –65°C to +150°C, as confirmed in Microsemi's official datasheet revision D.
Does the 1N5368BE3/TR12 require dry packing before PCB assembly?
No, the 1N5368BE3/TR12 does not require dry packing. Its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1, meaning it can be stored indefinitely at ambient conditions without desiccant or baking. This is verified in the "Mechanical and Packaging" section of the Microsemi datasheet, which explicitly states "no dry pack required."
What is the maximum surge current rating for the 1N5368BE3/TR12?
The 1N5368BE3/TR12 has a maximum non-repetitive surge current (IZSM) of 210 A, defined as the peak value of an 8.3 ms half-sine wave. This rating is measured under standardized test conditions and supports use in transient voltage suppression applications such as DC bus clamping in motor drives and industrial controls.
How is thermal performance specified for the 1N5368BE3/TR12?
The 1N5368BE3/TR12 specifies two thermal resistance values: 25 °C/W junction-to-lead (measured at 3/8″ lead length from body) and 85 °C/W junction-to-ambient (on FR4 with 4 mm² copper pads). These define its safe DC power handling - up to 5 W at TL = 25°C, derating linearly above that temperature per Figure 1 in the datasheet.
Is the 1N5368BE3/TR12 compatible with lead-free reflow soldering processes?
Yes, the 1N5368BE3/TR12 features RoHS-compliant annealed matte-tin plating and is rated for solder temperatures up to 260 °C for 10 seconds, fully compatible with standard lead-free reflow profiles. This is documented in the "Mechanical and Packaging" section under "Solder Temperatures" and confirmed by the "e3" suffix denoting RoHS compliance.
1N5368BE3/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):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 33.8 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
1N5368BE3/TR12 FAQ
1.How can I place an order for 1N5368BE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5368BE3/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 1N5368BE3/TR12 reliable?
The price and inventory of 1N5368BE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5368BE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5368BE3/TR12?
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4.How is shipping managed for 1N5368BE3/TR12?
1N5368BE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5368BE3/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 1N5368BE3/TR12?
For technical support, including 1N5368BE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5368BE3/TR12 requirements.
6.How does Aetrix verify that 1N5368BE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5368BE3/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 1N5368BE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5368BE3/TR12?
All 1N5368BE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5368BE3/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 1N5368BE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5368BE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5368BE3/TR12 Tags
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BZT52C5V6T-7
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MMSZ4682T1G
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MM5Z5V1ST1G
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