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Microchip Technology 1N5350/TR8
- Part No.:
- 1N5350/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5350/TR8.pdf
- Description:
- DIODE ZENER 13V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,999
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Product details
Overview
1N5350/TR8 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). It operates across –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5350/TR8 datasheet, 1N5350/TR8 pinout, 1N5350/TR8 application, or 1N5350/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 performance at 9.4 V (1.0 µA max), and RoHS-compliant matte-tin lead plating.
Technical Context
This device functions as a two-terminal voltage reference operating in reverse breakdown, with Zener voltage specified at 100 mA test current (IZT) and measured at 25 °C lead temperature. Its low dynamic impedance (2.5 Ω) ensures stable regulation under varying load currents, and its 25 °C/W thermal resistance enables reliable 5 W dissipation when leads are mounted ≥10 mm from body.
The 1N5350/TR8 exhibits minimal voltage drift versus current-ΔVZ ≤ 0.25 V between 10% and 50% of IZM-and withstands non-repetitive 8.3 ms half-sine surge currents up to 7.0 A. Polarity is unambiguous: cathode indicated by band, requiring banded end to be positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13 V ±5% at 100 mA - defines precise regulation point for feedback and clamping circuits |
| Power Dissipation | 5.0 W at TL = 25 °C (3/8″ lead length) - sets maximum continuous DC power handling with adequate heatsinking |
| Dynamic Impedance (ZZ) | 2.5 Ω max at 100 mA - ensures low output impedance and tight voltage stability under load variation |
| Reverse Leakage (IR) | 1.0 µA max at 9.4 V - guarantees minimal standby current in high-impedance bias networks |
| Surge Current (IZSM) | 7.0 A peak (8.3 ms half-sine) - supports transient overvoltage suppression without failure |
| Thermal Resistance | 25 °C/W junction-to-lead - enables predictable thermal design when leads serve as heat path |
| Operating Temperature | –65 °C to +150 °C - suitable for industrial, automotive, and aerospace environments with wide ambient swings |
Pinout & Package
Package: Axial-leaded T-18 molded epoxy case (UL94V-0), 0.7 g weight, cathode identified by color band. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased operation requires this terminal negative relative to cathode |
| Cathode | Regulated output node | Banded end; connected to regulated rail or error amplifier input; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener series | Industry-standard 1N53xxB family ensures cross-manufacturer compatibility and design reuse |
| Moisture sensitivity Level 1 | No dry pack required - simplifies SMT reflow prep and reduces handling overhead |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special ESD handling in assembly |
| Tight voltage regulation | ΔVZ ≤ 0.25 V across 10–50% of IZM - delivers consistent reference accuracy in variable-load applications |
| High surge current capability | 7.0 A non-repetitive surge rating - provides robust transient immunity without external crowbar |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference element setting feedback threshold for PWM controller. Use Value: 13 V ±5% regulation and 2.5 Ω ZZ ensure stable loop gain and <±0.5% output tolerance across line/load/temperature. |
Use Scenario: Clamping transient spikes on 12 V automotive or industrial bus lines during load dump or inductive switching. IC Role / Device Role / Timing Role: Shunt protection device diverting excess energy to ground before downstream ICs exceed absolute maximum ratings. Use Value: 7.0 A surge rating and 0.25 V ΔVZ allow safe clamping of 100 V/50 ms transients without voltage overshoot beyond 13.25 V. |
| Programmable Reference Source | Temperature-Stable Bias Network |
Use Scenario: Generating fixed bias voltages for op-amp input stages or ADC reference dividers in instrumentation systems. IC Role / Device Role / Timing Role: Primary voltage reference node establishing known potential for analog signal conditioning paths. Use Value: –65 °C to +150 °C operating range and low ΔVZ minimize drift-induced offset errors in precision measurement front-ends. |
Use Scenario: Setting stable quiescent current in Class-A amplifier stages or sensor excitation circuits exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Thermal-stable current source element using Zener-regulated voltage across emitter resistor. Use Value: 25 °C/W junction-to-lead thermal resistance allows direct mounting to chassis or heatsink, maintaining <1 °C/W effective thermal path for <10 ppm/°C drift. |
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 | No TR8 tape-and-reel packaging; bulk or ammo-pack only; identical electrical specs and T-18 package | Lacks standardized reel format for automated pick-and-place; same thermal and regulation performance | Select 1N5350B for manual prototyping or low-volume hand assembly where reel logistics are unnecessary |
| MMSZ5242B-TP | Surface-mount SOD-123 package (2.5 × 1.2 mm); 13 V ±5%; lower IZM (190 mA vs. 100 mA); higher ZZ (9 Ω) | Enables high-density PCB layouts but requires thermal pad design; less stable regulation under dynamic loads | Choose MMSZ5242B-TP only when board space constraints prohibit axial-leaded components and thermal derating is acceptable |
Compared with 1N5350/TR8, the 1N5350B offers identical regulation performance without tape-and-reel convenience, while the MMSZ5242B-TP trades mechanical robustness and low-impedance regulation for miniaturization-making 1N5350/TR8 optimal for high-reliability, thermally demanding, through-hole power applications.
Availability
1N5350/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable reference sources requiring stable component supply, long-lifecycle support, and JEDEC-standard compliance.
Supply support for 1N5350/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 engineered for ruggedized voltage regulation in mission-critical power systems, emphasizing thermal resilience, surge survivability, and long-term parametric stability under extreme environmental stress.
FAQ
What is the Zener voltage tolerance of the 1N5350/TR8?
The 1N5350/TR8 carries a "B" suffix, indicating a ±5% Zener voltage tolerance at 100 mA test current. This yields a guaranteed regulation range of 12.35 V to 13.65 V at 25 °C lead temperature, as confirmed in the Microsemi 1N5333B–1N5388B datasheet revision D.
Does the 1N5350/TR8 require dry packing before reflow soldering?
No-the 1N5350/TR8 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it is not hygroscopic and does not require dry pack or baking prior to reflow. Its void-free epoxy encapsulation prevents moisture ingress during standard SMT processes.
What is the maximum steady-state power dissipation for the 1N5350/TR8 on a standard FR4 PCB?
When mounted on 1 oz copper FR4 with 4 mm² pads and 1 mm × 25 mm traces, the 1N5350/TR8 is rated for 1.47 W at 25 °C ambient. This derates linearly above 25 °C at 11.8 mW/°C, per Figure 1 in the official datasheet.
Can the 1N5350/TR8 be used as a replacement for the 1N5350B?
Yes-the 1N5350/TR8 is functionally and electrically identical to the 1N5350B, differing only in packaging: TR8 denotes EIA-296 standard tape-and-reel (8 mm carrier, 2000 pcs/reel), whereas 1N5350B is supplied in bulk or ammo pack. No circuit or layout changes are needed.
What is the reverse leakage current specification for the 1N5350/TR8 at its rated Zener voltage?
The 1N5350/TR8 specifies maximum reverse leakage current (IR) of 1.0 µA at 9.4 V (70% of nominal 13 V), per the "IR TEST VOLTAGE (B,C,D Suffix)" column in the Electrical Characteristics table. At full 13 V, leakage remains well below 5 µA.
1N5350/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:
- ±20%
- 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
1N5350/TR8 FAQ
1.How can I place an order for 1N5350/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5350/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 1N5350/TR8 reliable?
The price and inventory of 1N5350/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5350/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5350/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5350/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5350/TR8?
1N5350/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5350/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 1N5350/TR8?
For technical support, including 1N5350/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5350/TR8 requirements.
6.How does Aetrix verify that 1N5350/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5350/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 1N5350/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5350/TR8?
All 1N5350/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5350/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 1N5350/TR8 part is unused and in its original packaging.
Return procedure for 1N5350/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5350/TR8 Tags
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