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Microchip Technology 1N5350B/TR12
- Part No.:
- 1N5350B/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5350B/TR12.pdf
- Description:
- DIODE ZENER 13V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,127
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Product details
Overview
1N5350B/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 13 V, ±5% tolerance (B suffix), 100 mA maximum regulator current (IZM), 2.5 Ω maximum dynamic impedance (ZZ), and 0.25 V maximum voltage regulation (ΔVZ) - used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5350B/TR12 datasheet, 1N5350B/TR12 pinout, 1N5350B/TR12 application, or 1N5350B/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (7.0 A), reverse leakage at 9.4 V (1.0 µA), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device operates as a two-terminal voltage reference, conducting in reverse breakdown to maintain stable output voltage across wide current (100 mA max IZM) and temperature (-65 °C to +150 °C) ranges. Its low dynamic impedance (2.5 Ω) and tight ΔVZ (0.25 V) ensure minimal voltage drift under varying load conditions.
Designed for through-hole mounting with T-18 axial package, it features moisture sensitivity level 1 (no dry pack required), UL94V-0 epoxy case, and cathode band polarity marking. Thermal performance is specified at 3/8" lead length (25 °C/W) or FR4 board mount (85 °C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13 V ±5% - defines stable regulation point for feedback or clamping circuits |
| Test Current (IZT) | 100 mA - operating point where VZ and ZZ are specified |
| Dynamic Impedance (ZZ) | 2.5 Ω max - low AC resistance ensures minimal voltage variation with current changes |
| Max Regulator Current (IZM) | 100 mA - maximum continuous DC current before thermal derating applies |
| Voltage Regulation (ΔVZ) | 0.25 V max - difference between VZ measured at 10% and 50% of IZM |
| Surge Current (IZSM) | 7.0 A - peak non-repetitive half-sine (8.3 ms) capability for transient suppression |
| Reverse Leakage (IR) | 1.0 µA max at VR = 9.4 V - low off-state current preserves efficiency in high-impedance bias networks |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case (UL94V-0 epoxy), cathode indicated by colored band; leads are tin-lead or RoHS-compliant matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage side in Zener mode | Connected to circuit ground or lower potential node during regulation |
| Cathode | Reverse breakdown terminal / high-voltage side in Zener mode | Banded end; connected to unregulated input or voltage rail requiring stabilization |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized electrical behavior and interchangeability across qualified suppliers |
| ±5% voltage tolerance (B suffix) | Enables tighter regulation than ±10% (A) or ±20% (no suffix) variants in feedback paths |
| 25 °C/W junction-to-lead thermal resistance | Supports 5 W dissipation with minimal heatsinking when leads are trimmed to 3/8" length |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special handling during assembly in standard environments |
| RoHS-compliant (e3 suffix) | Meets environmental compliance without sacrificing electrical or thermal performance |
Applications
| Switching Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Voltage reference element setting error amplifier threshold. Use Value: 13 V ±5% regulation and 0.25 V ΔVZ enable stable 12 V output within ±1% across line/load/temperature. | Use Scenario: Placed across sensitive IC inputs to limit transient overvoltage from ESD or inductive kickback. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess energy to ground. Use Value: 7.0 A surge rating and 1.0 µA IR at 9.4 V provide robust protection without loading normal operation. |
| Programmable Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Paired with resistive dividers to generate precise bias voltages for analog front-ends. IC Role / Device Role / Timing Role: Stable DC reference source independent of supply fluctuations. Use Value: Low 2.5 Ω ZZ and 25 °C/W thermal resistance maintain accuracy under varying ambient and load conditions. | Use Scenario: Supplies excitation voltage to bridge-based pressure or strain sensors in process control systems. IC Role / Device Role / Timing Role: Precision voltage source ensuring consistent sensor output scaling. Use Value: -65 °C to +150 °C operating range and moisture Level 1 rating support deployment in harsh industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5350B (bulk) | Identical electrical specs; differs only in packaging (TR12 = tape-and-reel, bulk has no reel) | No functional difference; TR12 enables automated SMT placement, bulk supports manual/hand-soldered prototyping | Select 1N5350B/TR12 for production lines using pick-and-place; choose bulk for lab evaluation or low-volume assembly |
| MMBZ5243B (SOT-23) | Same 13 V ±5%, but 0.35 W power rating, 300 mW max, surface-mount only | Not suitable for 5 W dissipation; limited to low-power bias/reference roles, not primary regulation | Use MMBZ5243B only where space-constrained PCB layout prohibits axial components and power demand ≤350 mW |
Compared with 1N5350B/TR12, the bulk version offers identical performance with manual handling convenience, while MMBZ5243B trades power capability for miniaturization-making 1N5350B/TR12 the sole choice for 5 W axial Zener regulation in industrial power supplies.
Availability
1N5350B/TR12 is available at Aetrix Electronics and suitable for switching power supply feedback, overvoltage clamp protection, and programmable voltage reference applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5350B/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 belongs to Microsemi's legacy silicon Zener diode product line, engineered for robust voltage regulation in high-stress power conversion and protection circuits across extended temperature and surge environments.
FAQ
What is the Zener voltage tolerance of the 1N5350B/TR12?
The 1N5350B/TR12 has a Zener voltage tolerance of ±5%, as indicated by the "B" suffix in its part number. This means its nominal 13 V regulation point falls within 12.35 V to 13.65 V at 25 °C when tested at 100 mA. The tolerance remains stable across its full operating temperature range of -65 °C to +150 °C, supporting reliable performance in industrial and automotive environments where thermal cycling occurs.
How much power can the 1N5350B/TR12 dissipate continuously?
The 1N5350B/TR12 is rated for 5.0 W steady-state power dissipation at 25 °C lead temperature (TL), provided leads are trimmed to 3/8" (10 mm) length from the body. When mounted on an FR4 PCB with 1 oz copper and specified pad geometry, its derated power drops to 1.47 W at 25 °C ambient (TA). Derating curves in the official datasheet define linear reduction above 25 °C, making thermal design critical for sustained 5 W operation.
What does the "TR12" suffix mean in 1N5350B/TR12?
The "TR12" suffix indicates tape-and-reel packaging per EIA-296 standard, with 12,000 units per reel. This format enables automated surface-mount or through-hole placement in high-volume manufacturing. The underlying electrical and thermal specifications of the 1N5350B/TR12 are identical to the bulk-packaged 1N5350B; only the packaging method and logistics configuration differ-no performance or reliability impact is introduced by the TR12 designation.
Is the 1N5350B/TR12 RoHS compliant?
Yes, the 1N5350B/TR12 is RoHS compliant, as confirmed by the "e3" designation in Microsemi's official documentation and packaging markings. Its leads use annealed matte-tin plating instead of tin-lead, meeting EU Directive 2011/65/EU requirements. Compliance is verified per JEDEC J-STD-609A, and the device carries no exemptions-making it suitable for export to regulated markets without additional certification burden.
What is the maximum reverse leakage current for the 1N5350B/TR12?
The 1N5350B/TR12 has a maximum reverse leakage current (IR) of 1.0 µA when tested at 9.4 V (VR), which is 72.3% of its nominal 13 V Zener voltage. This low leakage ensures minimal parasitic current draw in high-impedance reference or bias networks. The value is guaranteed across the full -65 °C to +150 °C operating temperature range and reflects worst-case behavior under specified test conditions per JEDEC standards.
1N5350B/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):
- 13 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 9.4 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
1N5350B/TR12 FAQ
1.How can I place an order for 1N5350B/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5350B/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 1N5350B/TR12 reliable?
The price and inventory of 1N5350B/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5350B/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5350B/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5350B/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5350B/TR12?
1N5350B/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5350B/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 1N5350B/TR12?
For technical support, including 1N5350B/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5350B/TR12 requirements.
6.How does Aetrix verify that 1N5350B/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5350B/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 1N5350B/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5350B/TR12?
All 1N5350B/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5350B/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 1N5350B/TR12 part is unused and in its original packaging.
Return procedure for 1N5350B/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5350B/TR12 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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SMAZ12-13-F
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