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Microchip Technology 1N5356C/TR12
- Part No.:
- 1N5356C/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5356C/TR12.pdf
- Description:
- DIODE ZENER 19V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,112
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Product details
Overview
1N5356C/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 19 V, ±2% tolerance (C suffix), 65 mA test current (IZT), 3.0 Ω dynamic impedance (ZZ), and 75 mA maximum Zener current (IZM) at 25°C lead temperature. 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 1N5356C/TR12 datasheet, 1N5356C/TR12 pinout, 1N5356C/TR12 application, or 1N5356C/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (75 A), voltage regulation (ΔVZ = 0.40 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-bias mode, where the cathode band denotes the positive terminal during operation. Its low dynamic impedance (3.0 Ω) ensures stable regulation under varying load currents, and its 25 °C/W thermal resistance enables reliable 5 W dissipation when leads are mounted at 3/8″ (10 mm) from the body.
The 1N5356C/TR12 complies with JEDEC registration standards and features moisture sensitivity Level 1 per IPC/JEDEC J-STD-020B-no dry pack required-and meets MIL-STD-750 Method 1020 for ESD insensitivity. It is not a surface-mount device; the TR12 suffix indicates tape-and-reel packaging per EIA-296.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19 V ±2% - precise regulation point for feedback networks requiring tight voltage stability |
| Test Current (IZT) | 65 mA - operating current at which VZ is specified; defines optimal regulation zone |
| Dynamic Impedance (ZZ) | 3.0 Ω - low AC resistance ensures minimal voltage shift under load transients |
| Max Zener Current (IZM) | 75 mA - maximum continuous DC current at TL = 25°C with adequate heat sinking |
| Power Dissipation | 5.0 W at TL < 25°C - requires mechanical lead length control (3/8″) for full rating |
| Thermal Resistance | 25 °C/W junction-to-lead - enables predictable thermal design with standard axial mounting |
| Surge Current (IZSM) | 75 A (8.3 ms half-sine) - withstands short-duration overvoltage events without failure |
| Voltage Regulation (ΔVZ) | 0.40 V - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic encapsulated case (Void-free transfer molded thermosetting epoxy, UL94V-0 rated); cathode indicated by color band; weight 0.7 g; RoHS-compliant matte-tin plating on annealed leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias reference node | Connected to system ground or lower-potential rail; forms reference return path |
| Cathode | Regulated output node | Banded end; connected to feedback point or protected circuit node; maintains 19 V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables high-accuracy voltage references without external trimming in industrial power supplies |
| JEDEC-registered 1N53xxB series | Guarantees standardized electrical behavior and interchangeability across qualified suppliers |
| Moisture sensitivity Level 1 | Eliminates baking requirements before PCB assembly-reduces manufacturing overhead |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Supports handling in non-ESD-controlled environments without parametric shift or failure |
| Tape-and-reel packaging (TR12 suffix) | Enables automated pick-and-place placement; compliant with EIA-296 carrier specifications |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting precise 19 V threshold for TL431 or similar shunt regulator input. Use Value: ±2% tolerance ensures output accuracy within ±0.5% over line/load/temperature, meeting industrial PSU specs. | Use Scenario: Protects downstream ICs from transient overvoltage on 24 V DC rails in factory automation systems. IC Role / Device Role / Timing Role: Shunt clamp activated above 19 V to divert excess current and limit rail excursion. Use Value: 75 A surge rating absorbs 8.3 ms transients per IEC 61000-4-5, preventing latch-up or damage to 3.3 V logic. |
| Programmable Voltage Reference | DC-DC Converter Trim Circuit |
Use Scenario: Provides stable 19 V reference for DAC-based programmable power supplies in test equipment. IC Role / Device Role / Timing Role: Primary voltage reference source for op-amp error amplifiers controlling output setpoint. Use Value: 3.0 Ω dynamic impedance minimizes output drift under varying DAC loading, ensuring <10 mV error. | Use Scenario: Fine-tunes output voltage of fixed 12 V DC-DC modules using external resistor divider. IC Role / Device Role / Timing Role: Precision Zener in bottom leg of trim divider, replacing less accurate 1% metal-film resistors. Use Value: Replaces two-resistor network with single 19 V reference, reducing component count and improving long-term stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5356B/TR12 | ±5% tolerance (B suffix) vs. ±2% (C suffix); otherwise identical electrical specs and package | Acceptable where tighter regulation is not required; lower cost for non-critical references | Select 1N5356B/TR12 only if system-level testing confirms ±5% VZ meets overall output accuracy budget |
| MMSZ5247ET1G | Surface-mount SOD-123 package; 19 V ±5%; 500 mW rating; 30 Ω ZZ; 20 mA IZM | Not suitable for 5 W dissipation; limited to low-power biasing or signal-level clamping | Choose MMSZ5247ET1G only for space-constrained PCBs where power <0.5 W and thermal mass is insufficient for axial devices |
Compared with 1N5356B/TR12, the 1N5356C/TR12 delivers tighter regulation for feedback-critical designs, while MMSZ5247ET1G offers footprint reduction at the expense of power handling and precision-neither is pin-compatible due to differing form factors and thermal limits.
Availability
1N5356C/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, programmable voltage references, and DC-DC converter trim networks requiring stable component supply across extended temperature ranges and high-reliability production.
Supply support for 1N5356C/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for robust, high-power voltage regulation in harsh-environment power systems-emphasizing thermal resilience, surge immunity, and long-term parametric stability under thermal cycling.
FAQ
What is the Zener voltage tolerance of the 1N5356C/TR12?
The 1N5356C/TR12 has a Zener voltage tolerance of ±2%, as indicated by the "C" suffix per Microsemi's documentation. This means its regulated voltage falls within 18.62 V to 19.38 V at 65 mA test current and 25°C lead temperature. The 1N5356C/TR12 achieves this tighter tolerance through post-production screening, distinguishing it from the ±5% 1N5356B/TR12 variant.
Can the 1N5356C/TR12 be used in surface-mount designs?
No, the 1N5356C/TR12 is an axial-leaded T-18 package device and is not compatible with surface-mount assembly processes. For SMT equivalents, Microsemi offers the SMBJ5356B series-but note these are 5 W surface-mount Zeners with different thermal characteristics and footprint. The 1N5356C/TR12 requires through-hole mounting with 3/8″ lead length control to achieve its rated 5 W dissipation.
What is the maximum surge current rating for the 1N5356C/TR12?
The 1N5356C/TR12 has a maximum non-recurrent surge current (IZSM) rating of 75 A for an 8.3 ms half-sine waveform, as specified in the Microsemi datasheet. This value reflects its ability to absorb transient energy without parametric shift or catastrophic failure. Engineers must ensure external current-limiting impedance prevents sustained conduction beyond this rating during fault conditions involving the 1N5356C/TR12.
How does the thermal resistance of the 1N5356C/TR12 affect PCB layout?
With a junction-to-lead thermal resistance of 25 °C/W, the 1N5356C/TR12 requires mechanical control of lead length-specifically 3/8″ (10 mm) from the body-to achieve full 5 W power dissipation. Layouts must avoid excessive copper pour on leads and maintain air gap clearance; mounting on FR4 with 1 oz Cu yields 85 °C/W junction-to-ambient, limiting usable power to ~1.47 W unless heatsinking is added. This directly impacts reliability margins in the 1N5356C/TR12's thermal design.
Is the 1N5356C/TR12 RoHS compliant?
Yes, the 1N5356C/TR12 is RoHS compliant, as confirmed by the "e3" designation in Microsemi's official documentation and its matte-tin lead plating per MIL-STD-750. The "TR12" suffix denotes EIA-296 tape-and-reel packaging, and the device meets exemption 7a for lead in high-melting-temperature solder alloys. Full compliance documentation for the 1N5356C/TR12 is available from Microchip Technology's product change notices and material declarations.
1N5356C/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):
- 19 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 3 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 13.7 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
1N5356C/TR12 FAQ
1.How can I place an order for 1N5356C/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5356C/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 1N5356C/TR12 reliable?
The price and inventory of 1N5356C/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5356C/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5356C/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5356C/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5356C/TR12?
1N5356C/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5356C/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 1N5356C/TR12?
For technical support, including 1N5356C/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5356C/TR12 requirements.
6.How does Aetrix verify that 1N5356C/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5356C/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 1N5356C/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5356C/TR12?
All 1N5356C/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5356C/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 1N5356C/TR12 part is unused and in its original packaging.
Return procedure for 1N5356C/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5356C/TR12 Tags
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MM5Z5V1ST1G
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