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Microchip Technology 1N5350B/TR8
- Part No.:
- 1N5350B/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5350B/TR8.pdf
- Description:
- DIODE ZENER 13V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,357
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Product details
Overview
1N5350B/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with a 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/TR8 datasheet, 1N5350B/TR8 pinout, 1N5350B/TR8 application, or 1N5350B/TR8 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 VR = 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 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 package, it features void-free thermosetting epoxy encapsulation (UL94V-0), cathode band polarity marking, and moisture sensitivity level 1 - eliminating dry-pack requirements. Thermal performance is specified at 3/8" lead length (25 °C/W) and on FR4 PCB (85 °C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13 V ±5% - defines precise regulation point for feedback networks and reference circuits. |
| Power Dissipation | 5.0 W at TL < 25 °C - supports high-current regulation when adequately heat-sunk via leads. |
| Test Current (IZT) | 100 mA - operating point where VZ and ZZ are guaranteed per JEDEC spec. |
| Dynamic Impedance (ZZ) | 2.5 Ω max - ensures low AC impedance for stable regulation under transient load changes. |
| Voltage Regulation (ΔVZ) | 0.25 V max - difference between VZ measured at 10% and 50% of IZM, indicating line regulation fidelity. |
| Surge Current (IZSM) | 7.0 A peak (8.3 ms half-sine) - withstands short-duration overvoltage transients without failure. |
| Reverse Leakage (IR) | ≤1.0 µA at VR = 9.4 V - guarantees low standby power loss in high-impedance bias networks. |
Pinout & Package
Package: T-18 axial-leaded plastic case (void-free UL94V-0 epoxy), cathode indicated by colored band; leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common or lower-potential rail; forward voltage ≤1.2 V @ 1.0 A. |
| Cathode | Zener breakdown terminal / Regulated output node | Banded end; operated positive relative to anode; delivers stable 13 V under reverse bias. |
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 feedback loop control vs. ±10% (A) or ±20% (no suffix) variants. |
| Low thermal resistance (25 °C/W) | Allows sustained 5 W operation with simple lead heatsinking - no PCB copper pour required. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for handling precautions during manual assembly or prototyping. |
| Moisture Level 1 (J-STD-020B) | Permits direct use from reel without baking - reduces manufacturing overhead and risk of popcorning. |
Applications
| Switching Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Integrated into optocoupler feedback path of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Precision voltage reference setting error amplifier trip point. Use Value: 13 V ±5% regulation enables ±1% output accuracy; low ΔVZ minimizes load-induced drift. | Use Scenario: Placed across sensitive IC inputs or bus lines to shunt transient surges above safe threshold. IC Role / Device Role / Timing Role: Fast-acting crowbar element clamping voltage to 13 V before damage occurs. Use Value: 7.0 A surge rating absorbs 8.3 ms transients; low ZZ ensures rapid response without overshoot. |
| Programmable Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Used with external resistors to generate stable bias voltages for op-amp input stages or ADC references. IC Role / Device Role / Timing Role: Primary voltage reference source in analog front-end circuits. Use Value: 2.5 Ω ZZ and 0.25 V ΔVZ provide low-noise, high-stability reference under varying load currents. | Use Scenario: Supplies excitation voltage to bridge-based pressure or strain sensors in harsh industrial environments. IC Role / Device Role / Timing Role: Stable excitation source maintaining sensor linearity and repeatability. Use Value: -65 °C to +150 °C operating range ensures reliability in uncontrolled enclosures; RoHS plating resists corrosion. |
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 - no tape-and-reel (TR8) carrier. | No automated pick-and-place support; suitable for hand-soldered prototypes or low-volume repair. | Select 1N5350B/TR8 for SMT-compatible reel-fed assembly; choose bulk 1N5350B for bench testing or field replacement. |
| MMSZ5242B-TP (Micro Commercial) | Surface-mount SOD-123 package; same 13 V ±5%, but lower 500 mW power rating and higher 10 Ω ZZ. | Not interchangeable in through-hole designs; limited to low-power, space-constrained PCBs. | Choose MMSZ5242B-TP only when board real estate is critical and power dissipation ≤0.5 W is sufficient. |
Compared with 1N5350B/TR8, the bulk variant offers identical regulation performance without reel logistics, while MMSZ5242B-TP trades power handling and impedance for miniaturization - making 1N5350B/TR8 optimal for robust 5 W through-hole regulation where thermal margin and stability are prioritized.
Availability
1N5350B/TR8 is available at Aetrix Electronics and suitable for switching power supplies, overvoltage protection circuits, programmable voltage references, and industrial sensor excitation requiring stable component supply and full traceability.
Supply support for 1N5350B/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xxB series belongs to Microsemi's legacy high-power Zener diode product line, engineered for rugged voltage regulation in mission-critical power systems where thermal stability and surge resilience are essential.
FAQ
What is the Zener voltage tolerance of the 1N5350B/TR8?
The 1N5350B/TR8 has a Zener voltage tolerance of ±5%, as indicated by the "B" suffix per Microsemi's datasheet. This means its regulated voltage falls within 12.35 V to 13.65 V at 100 mA test current and 25 °C lead temperature. The tolerance is guaranteed across the full operating temperature range (-65 °C to +150 °C), and the device is JEDEC-registered for consistent specification compliance.
Can the 1N5350B/TR8 be used in surface-mount designs?
No, the 1N5350B/TR8 is not suitable for surface-mount designs. It uses a T-18 axial-leaded package intended for through-hole mounting. While Microsemi offers surface-mount equivalents like SMBJ5350B, the 1N5350B/TR8 requires hole mounting and lead forming. Attempting SMT reflow will damage the device due to incompatible thermal mass and plating profile.
What is the maximum surge current rating for the 1N5350B/TR8?
The 1N5350B/TR8 has a maximum non-recurrent surge current (IZSM) of 7.0 A, specified for an 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient energy without parametric shift or catastrophic failure. The surge capability is enabled by its 5 W power rating and low thermal resistance (25 °C/W junction-to-lead), making it suitable for clamping inductive switch-off spikes or lightning-induced surges.
How does the 1N5350B/TR8 handle thermal derating?
The 1N5350B/TR8 derates linearly above 25 °C lead temperature (TL): power dissipation drops to zero at 150 °C TL. At TL = 75 °C, rated power is reduced to 3.75 W. When mounted on FR4 PCB (1 oz Cu, 4 mm² pads), its thermal resistance rises to 85 °C/W, limiting steady-state power to 1.47 W at 25 °C ambient. Derating curves are provided in Figure 1 of the Microsemi datasheet.
Is the 1N5350B/TR8 RoHS compliant?
Yes, the 1N5350B/TR8 is RoHS compliant, as confirmed by the "e3" suffix in Microsemi's official documentation. Its leads feature annealed matte-tin plating per MIL-STD-750 Method 2026, and the void-free epoxy body meets UL94V-0 flammability standards. The "TR8" suffix denotes tape-and-reel packaging per EIA-296, fully compatible with RoHS-compliant automated assembly processes.
1N5350B/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):
- 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/TR8 FAQ
1.How can I place an order for 1N5350B/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5350B/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 1N5350B/TR8 reliable?
The price and inventory of 1N5350B/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5350B/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5350B/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5350B/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5350B/TR8?
1N5350B/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5350B/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 1N5350B/TR8?
For technical support, including 1N5350B/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5350B/TR8 requirements.
6.How does Aetrix verify that 1N5350B/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5350B/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 1N5350B/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5350B/TR8?
All 1N5350B/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5350B/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 1N5350B/TR8 part is unused and in its original packaging.
Return procedure for 1N5350B/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5350B/TR8 Tags
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MM5Z5V1ST1G
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