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Microchip Technology 1N5368B/TR8
- Part No.:
- 1N5368B/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5368B/TR8.pdf
- Description:
- DIODE ZENER 47V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,684
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Product details
Overview
1N5368B/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 47 V, ±5% tolerance (B suffix), 25 mA test current, 25 Ω maximum dynamic impedance at IZT, and 0.5 μA maximum reverse leakage at 35.8 V. It regulates voltage in power supply reference and overvoltage protection circuits across industrial temperature range.
For engineers reviewing the 1N5368B/TR8 datasheet, 1N5368B/TR8 pinout, 1N5368B/TR8 application, or 1N5368B/TR8 equivalent, this page provides verified electrical specs, thermal derating behavior, JEDEC T-18 package details, and validated alternative Zeners for stable 47 V regulation under high-surge conditions.
Technical Context
This Zener operates in reverse breakdown mode with cathode-banded polarity, requiring the banded end to be held positive relative to the anode. Its regulation stability relies on low dynamic impedance (25 Ω) and tight voltage regulation (ΔVZ = 2.7 V between 10% and 50% of IZM).
Thermal performance is defined by junction-to-lead resistance of 25 °C/W at 3/8″ lead length and 85 °C/W junction-to-ambient on FR4 with specified copper pad geometry. Maximum steady-state power drops to 1.47 W at TA = 25 °C when mounted per JEDEC test board conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±5% - precise reference voltage for feedback loops and clamp thresholds |
| Test Current (IZT) | 25 mA - operating point where VZ and ZZ are guaranteed per JEDEC spec |
| Dynamic Impedance (ZZ) | 25 Ω max at IZT - low AC impedance ensures minimal output voltage variation under load transients |
| Max Reverse Leakage (IR) | 0.5 μA at 35.8 V - negligible standby current in high-impedance bias networks |
| Max Regulator Current (IZM) | 210 mA - maximum DC current before exceeding 5 W dissipation at TL = 25 °C |
| Voltage Regulation (ΔVZ) | 2.7 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Surge Current (IZSM) | 210 A - peak non-repetitive half-sine surge (8.3 ms) capability for transient suppression |
| Forward Voltage (VF) | 1.2 V max @ 1.0 A - ensures predictable conduction during forward-biased fault conditions |
Pinout & Package
JEDEC T-18 axial-leaded plastic package with void-free UL94V-0 epoxy body, tin-lead or RoHS-compliant matte-tin plating, cathode indicated by band, and 0.7 g weight. Leads are 3/8″ (10 mm) long from body for thermal rating compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias reference node | Connected to system ground or lower-potential rail; defines cathode-to-anode polarity for Zener operation |
| Cathode (banded end) | Regulated output node | Connected to voltage source; maintains 47 V relative to anode when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered T-18 package | Standardized mechanical interface enabling drop-in replacement and automated axial insertion |
| Moisture sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out prior to soldering |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Robust handling in non-ESD-controlled environments without parametric shift or failure |
| High surge current rating (210 A) | Withstands 8.3 ms half-sine surges per IEEE C62.41 - suitable for AC line transient clamping |
| RoHS-compliant option (e3 suffix) | Meets EU Directive 2011/65/EU with annealed matte-tin plating and lead-free assembly compatibility |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator or switching converter error amplifier circuits. IC Role / Device Role / Timing Role: Zener diode providing fixed 47 V reference to comparator or op-amp input. Use Value: Maintains ±5% regulation over 25–210 mA operating range, minimizing output drift due to load or line variation. | Use Scenario: Clamping transient spikes on 48 V DC bus lines in telecom or industrial control systems. IC Role / Device Role / Timing Role: Shunt element diverting excess energy to ground when bus exceeds 47 V. Use Value: Absorbs 210 A surge (8.3 ms) without degradation, protecting downstream MOSFETs and controllers. |
| Temperature-Stable Bias Network | Programmable Threshold Detector |
Use Scenario: Generating stable bias current for precision amplifiers or sensor excitation circuits. IC Role / Device Role / Timing Role: Zener-based current source with low ΔVZ (2.7 V) and 25 Ω ZZ ensuring minimal tempco-induced error. Use Value: Delivers consistent current over –65 °C to +150 °C ambient, critical for automotive under-hood designs. | Use Scenario: Setting trip point for undervoltage/overvoltage monitoring in battery management systems. IC Role / Device Role / Timing Role: Reference element in comparator circuit detecting deviation from 47 V nominal battery stack voltage. Use Value: Tight ±5% tolerance enables accurate threshold setting without calibration, reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5368BRLG (ON Semiconductor) | Same 47 V ±5%, 5 W rating, but TO-204AA (DO-41) package with 200 mW higher Pd at 25 °C ambient on FR4 | Slightly better thermal performance on PCB; identical axial mounting but different lead spacing | Select when board layout allows DO-41 footprint and higher ambient power margin is needed |
| BZX85C47 (Nexperia) | 47 V ±5%, 1.3 W rating, DO-41 package, 100 Ω ZZ at 5 mA - lower power, higher impedance than 1N5368B/TR8 | Limited to low-current references; unsuitable for >100 mA regulation or surge clamping | Select only for space-constrained low-power bias networks where 5 W capability is unnecessary |
Compared with 1N5368B/TR8, the 1N5368BRLG offers identical regulation specs with minor thermal advantages in PCB mounting, while BZX85C47 trades power and impedance performance for smaller size-making the former a near-functional match and the latter a low-power alternative.
Availability
1N5368B/TR8 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and temperature-stable bias network applications requiring stable component supply across industrial, telecom, and embedded control markets.
Supply support for 1N5368B/TR8 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 5 W voltage regulation in harsh-environment power systems, emphasizing surge resilience, wide temperature operation, and JEDEC-standardized axial packaging.
FAQ
What is the Zener voltage tolerance of the 1N5368B/TR8?
The 1N5368B/TR8 has a nominal Zener voltage of 47 V with a tolerance of ±5%, as indicated by the "B" suffix per Microsemi's documentation. This tolerance applies across the full operating temperature range of –65 °C to +150 °C and is verified at 25 °C lead temperature using 40 ±10 ms DC current application.
Can the 1N5368B/TR8 be used in surface-mount designs?
No, the 1N5368B/TR8 is an axial-leaded T-18 package device and is not surface-mount compatible. Microsemi offers surface-mount equivalents such as SMBJ5368B for SMC packages, but the 1N5368B/TR8 requires through-hole mounting with 3/8″ lead length for rated thermal performance.
What is the maximum continuous current the 1N5368B/TR8 can handle at 25 °C ambient?
At TA = 25 °C on an FR4 PCB (1 oz Cu, 4 mm² pads, 1 mm × 25 mm trace), the 1N5368B/TR8 is rated for 1.47 W steady-state power, corresponding to approximately 31 mA continuous current (1.47 W ÷ 47 V). For full 5 W operation, it must be heat-sunk to maintain TL ≤ 25 °C at the lead.
Does the 1N5368B/TR8 meet RoHS requirements?
Yes, the "TR8" suffix indicates tape-and-reel packaging; RoHS compliance is confirmed by the "e3" designation referenced in Microsemi's datasheet. The device uses RoHS-compliant annealed matte-tin plating and meets EU Directive 2011/65/EU, with no exemptions required for lead content.
How does the voltage regulation (ΔVZ) specification impact circuit design with the 1N5368B/TR8?
The 1N5368B/TR8 has a ΔVZ of 2.7 V - the difference between Zener voltage measured at 10% and 50% of IZM (210 mA). This quantifies regulation linearity: designers must account for up to 2.7 V variation across its usable current range, especially in precision references where tighter regulation requires external compensation or lower-current operation.
1N5368B/TR8 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
1N5368B/TR8 FAQ
1.How can I place an order for 1N5368B/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5368B/TR8 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 1N5368B/TR8 reliable?
The price and inventory of 1N5368B/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5368B/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5368B/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5368B/TR8 transactions.
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4.How is shipping managed for 1N5368B/TR8?
1N5368B/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5368B/TR8 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 1N5368B/TR8?
For technical support, including 1N5368B/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5368B/TR8 requirements.
6.How does Aetrix verify that 1N5368B/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5368B/TR8 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 1N5368B/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5368B/TR8?
All 1N5368B/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5368B/TR8, 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 1N5368B/TR8 part is unused and in its original packaging.
Return procedure for 1N5368B/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5368B/TR8 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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