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Microchip Technology 1N5345BE3/TR13
- Part No.:
- 1N5345BE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5345BE3/TR13.pdf
- Description:
- DIODE ZENER 8.7V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,306
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Product details
Overview
1N5345BE3/TR13 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 8.7 V ±5%, 150 mA test current (IZT), 2.0 Ω dynamic impedance (ZZ), and maximum reverse current of 10 μA at 6.25 V (VR). 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 1N5345BE3/TR13 datasheet, 1N5345BE3/TR13 pinout, 1N5345BE3/TR13 application, or 1N5345BE3/TR13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (545 A), voltage regulation (ΔVZ = 0.20 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. Its Zener voltage is specified at 25 °C with 150 mA DC test current and exhibits low dynamic impedance (2.0 Ω) and tight regulation (ΔVZ = 0.20 V between 10% and 50% of IZM).
The 1N5345BE3/TR13 uses void-free thermosetting epoxy encapsulation (UL94V-0), features cathode band polarity marking, and achieves 25 °C/W thermal resistance when leads are trimmed to 3/8 inch (10 mm) from body - enabling stable regulation under sustained 5 W dissipation with appropriate heat sinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.7 V ±5% at 150 mA - defines precise regulation point for feedback and reference circuits |
| Power Dissipation (Pd) | 5.0 W at TL = 25 °C - supports high-current regulation without derating when lead-heat-sinked |
| Dynamic Impedance (ZZ) | 2.0 Ω at IZT = 150 mA - ensures minimal output voltage variation under load transients |
| Max Reverse Current (IR) | 10 μA at VR = 6.25 V - guarantees low leakage in standby and low-power monitoring modes |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables predictable temperature rise with standard lead-mounting practice |
| Surge Current (IZSM) | 545 A (8.3 ms half-sine) - withstands transient overvoltage events without degradation |
| Operating Temperature | –65 °C to +150 °C - suitable for industrial, automotive, and aerospace environments |
Pinout & Package
Package: T-18 axial-leaded plastic case (void-free UL94V-0 epoxy), 0.7 g weight, cathode indicated by colored band. Leads are annealed matte-tin plated (RoHS-compliant, solderable per MIL-STD-750 Method 2026).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to regulated rail; voltage referenced to anode; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized electrical behavior and interchangeability across qualified suppliers |
| ±5% voltage tolerance (B suffix) | Reduces calibration overhead in mid-precision analog references and supply monitors |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and bake-out prior to assembly - lowers manufacturing cost |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling without special static controls during board assembly and rework |
| High surge current capability | 545 A peak (8.3 ms) provides robust transient suppression without external TVS stacking |
Applications
| Industrial Power Supply Feedback | Automotive Battery Monitoring |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback or forward converter feedback networks using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Precision voltage reference establishing stable feedback threshold for PWM controller ICs. Use Value: 8.7 V ±5% regulation with 2.0 Ω dynamic impedance maintains <±0.2 V output deviation across line/load changes. |
Use Scenario: Detecting overvoltage conditions on 12 V vehicle battery rails during alternator load dump events. IC Role / Device Role / Timing Role: Clamping element protecting downstream analog sensors and microcontroller ADC inputs. Use Value: Withstands 545 A surge (8.3 ms) and holds clamp voltage within 0.20 V across 15–75 mA operating range. |
| Programmable Voltage Reference | Overvoltage Protection Circuit |
|
Use Scenario: Providing stable reference for DAC output buffers or analog comparator thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Low-drift, low-impedance reference source replacing higher-cost bandgap ICs where ±5% accuracy suffices. Use Value: 10 μA max reverse leakage at 6.25 V minimizes reference current error in high-impedance bias networks. |
Use Scenario: Cascading with series resistor to limit fault current during input overvoltage in DC-DC input stages. IC Role / Device Role / Timing Role: Primary shunt regulator absorbing excess energy before upstream fuse or MOSFET shuts down. Use Value: 5 W steady-state dissipation and 25 °C/W thermal resistance allow reliable operation without heatsink at ≤1 W average power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5345B (non-e3, non-TR) | Same electrical specs, but SnPb plating and bulk packaging - not RoHS-compliant or tape-and-reel ready | Not suitable for lead-free assembly or automated pick-and-place | Select 1N5345BE3/TR13 for RoHS compliance and SMT-line compatibility |
| MMSZ5236B-TP (Micro Commercial Components) | Surface-mount SOD-123 package, same 8.7 V ±5%, but lower Pd = 500 mW and higher ZZ = 10 Ω | Limited to low-power signal-level clamping; cannot replace 1N5345BE3/TR13 in 5 W power regulation | Choose 1N5345BE3/TR13 when axial mounting, high surge immunity, or full 5 W dissipation is required |
Compared with 1N5345B and MMSZ5236B-TP, the 1N5345BE3/TR13 uniquely combines RoHS-compliant matte-tin leads, tape-and-reel delivery, 5 W power handling, and 545 A surge rating - making it the only option among the three qualified for high-reliability, high-energy industrial power regulation.
Availability
1N5345BE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive battery management systems, and programmable voltage reference circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5345BE3/TR13 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 components for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized voltage regulation in harsh-environment power systems - emphasizing surge resilience, wide temperature operation, and JEDEC-standardized performance.
FAQ
What is the Zener voltage tolerance of the 1N5345BE3/TR13?
The 1N5345BE3/TR13 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its part number. This means its nominal 8.7 V regulation point falls within 8.265 V to 9.135 V at 25 °C with 150 mA test current. The e3 suffix confirms RoHS compliance, and TR13 denotes tape-and-reel packaging per EIA-296 standards.
Can the 1N5345BE3/TR13 be used in surface-mount designs?
No - the 1N5345BE3/TR13 uses axial-leaded T-18 packaging and is not a surface-mount device. For SMT equivalents, Microsemi offers the SMBJ5345B series. Attempting to mount the 1N5345BE3/TR13 in an SMT footprint would violate mechanical and thermal design rules and compromise reliability.
What is the maximum surge current rating for the 1N5345BE3/TR13?
The 1N5345BE3/TR13 is rated for a maximum non-recurrent surge current (IZSM) of 545 A, defined as the peak of an 8.3 ms half-sine waveform. This rating is validated under JEDEC test conditions and reflects the device's ability to absorb transient energy without parametric shift or failure when properly mounted with adequate lead length.
How does thermal resistance affect the 1N5345BE3/TR13's power handling?
The 1N5345BE3/TR13 has a junction-to-lead thermal resistance of 25 °C/W when leads are trimmed to 3/8 inch (10 mm) from the body. This allows full 5 W dissipation at 25 °C lead temperature. On FR4 PCBs with 1 oz copper, junction-to-ambient resistance rises to 85 °C/W, limiting usable power to ~1.47 W at 25 °C ambient unless additional copper area or heatsinking is applied.
Is the 1N5345BE3/TR13 suitable for automotive applications?
Yes - the 1N5345BE3/TR13 operates from –65 °C to +150 °C and meets MIL-STD-750 ESD testing (Method 1020). Its 545 A surge rating and 8.7 V regulation make it suitable for battery rail monitoring and load-dump protection in automotive ECUs, provided mechanical mounting and thermal design comply with AEC-Q200 stress guidelines.
1N5345BE3/TR13 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):
- 8.7 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 6.25 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
1N5345BE3/TR13 FAQ
1.How can I place an order for 1N5345BE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5345BE3/TR13 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 1N5345BE3/TR13 reliable?
The price and inventory of 1N5345BE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5345BE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5345BE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5345BE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5345BE3/TR13?
1N5345BE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5345BE3/TR13 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 1N5345BE3/TR13?
For technical support, including 1N5345BE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5345BE3/TR13 requirements.
6.How does Aetrix verify that 1N5345BE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5345BE3/TR13 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 1N5345BE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5345BE3/TR13?
All 1N5345BE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5345BE3/TR13, 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 1N5345BE3/TR13 part is unused and in its original packaging.
Return procedure for 1N5345BE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5345BE3/TR13 Tags
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BZT52C5V6T-7
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BZX84C3V3LT1G
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MM5Z5V1ST1G
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