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Microchip Technology 1N5356/TR12
- Part No.:
- 1N5356/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5356/TR12.pdf
- Description:
- DIODE ZENER 19V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,253
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Product details
Overview
1N5356/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 19 V, ±5% tolerance (B suffix), 3.0 Ω dynamic impedance at 65 mA test current, and maximum reverse current of 0.5 μA at 14.4 V. It operates from –65°C to +150°C and is used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5356/TR12 datasheet, 1N5356/TR12 pinout, 1N5356/TR12 application, or 1N5356/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (75 A), voltage regulation (ΔVZ = 0.40 V), and RoHS-compliant e3 marking compatibility.
Technical Context
This discrete Zener diode functions as a two-terminal voltage regulator in reverse-biased mode, with cathode indicated by a band. Its low dynamic impedance (3.0 Ω) ensures stable regulation across 10–50% of IZM (65 mA), and its 25 °C/W thermal resistance enables reliable 5 W operation when leads are mounted at 3/8″ (10 mm) from body.
It meets JEDEC 1N53xxB registration, supports MIL-PRF-19500 screening (with MQ/MX/MV prefixes), and features void-free UL94V-0 epoxy encapsulation with tin-lead or RoHS-compliant matte-tin plating - verified per MIL-STD-750 Method 2026.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19 V ±5% - precise regulation point at 65 mA, enabling stable reference in analog circuits. |
| Power Dissipation | 5.0 W at TL = 25°C - supports high-current regulation when lead-mounted with adequate heat sinking. |
| Dynamic Impedance (ZZ) | 3.0 Ω at IZT = 65 mA - low AC impedance minimizes output voltage variation under load transients. |
| Max Reverse Current | 0.5 μA at VR = 14.4 V - ensures minimal leakage in standby or low-power monitoring circuits. |
| Surge Current (IZSM) | 75 A (8.3 ms half-sine) - withstands transient overvoltage events without degradation. |
| Voltage Regulation (ΔVZ) | 0.40 V - difference between VZ measured at 10% and 50% of IZM, indicating tight regulation linearity. |
| Thermal Resistance | 25 °C/W junction-to-lead - enables predictable thermal design with standard axial-lead PCB mounting. |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC DO-201AD), void-free UL94V-0 epoxy body, cathode identified by colored 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 | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse bias applied across anode–cathode to enable regulation. |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to regulated rail; maintains 19 V relative to anode under reverse bias and specified current. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized electrical behavior and interchangeability across 1N5333B–1N5388B series. |
| Moisture sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out before assembly. |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - safe for manual handling and standard SMT/reflow environments. |
| RoHS-compliant option | e3 suffix indicates lead-free compliance - meets environmental directives without performance trade-offs. |
| High surge current capability | 75 A peak (8.3 ms) - protects downstream circuitry during lightning-induced or inductive-switching transients. |
Applications
| Industrial Power Supply Reference | Overvoltage Clamp in Telecom Line Cards |
|---|---|
Use Scenario: Provides stable 19 V reference for feedback loop in 24 V DC-DC converter used in PLC power modules. IC Role / Device Role / Timing Role: Two-terminal shunt regulator maintaining fixed voltage across error amplifier input. Use Value: Enables ±1% output regulation accuracy despite input ripple and load step changes due to 3.0 Ω ZZ and 0.40 V ΔVZ. | Use Scenario: Clamps induced surges on -48 V telecom battery feed lines to protect interface ICs. IC Role / Device Role / Timing Role: Transient voltage suppressor operating in reverse breakdown above 19 V threshold. Use Value: Absorbs 75 A surge (8.3 ms) without failure, preventing latch-up or damage to downstream RS-485 transceivers. |
| Programmable Logic Controller Input Protection | Analog Sensor Signal Conditioning |
Use Scenario: Limits input voltage to 19 V on 24 V-rated digital input channel exposed to field wiring faults. IC Role / Device Role / Timing Role: Shunt clamp protecting optocoupler LED and series resistor from overvoltage. Use Value: Maintains <0.5 μA leakage at 14.4 V, ensuring no false triggering during normal 0–24 V signal transitions. | Use Scenario: Stabilizes excitation voltage for 4–20 mA current-loop pressure sensor in harsh factory environments. IC Role / Device Role / Timing Role: Precision voltage reference source for sensor bridge biasing. Use Value: Delivers 19 V ±5% over –40°C to +85°C ambient, minimizing temperature-induced offset drift in measurement chain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5356B | Same 19 V ±5%, 5 W rating, but in bulk (non-tape-and-reel) packaging; no TR suffix. | Requires manual loading or tube-based placement; unsuitable for automated pick-and-place. | Select 1N5356/TR12 for SMT-compatible tape-and-reel delivery; choose 1N5356B for prototyping or low-volume hand assembly. |
| MMBZ5248BS | Surface-mount SOD-123 package, 19 V ±5%, 0.35 W - not power-equivalent; higher ZZ (30 Ω). | Used only in low-power signal-level clamping; cannot replace 1N5356/TR12 in 5 W regulation roles. | Choose MMBZ5248BS only for space-constrained PCBs where power dissipation ≤0.35 W is sufficient. |
Compared with 1N5356B and MMBZ5248BS, the 1N5356/TR12 uniquely combines 5 W axial-leaded power handling, JEDEC-standardized 19 V regulation, and EIA-296 tape-and-reel packaging - making it optimal for high-reliability industrial power and protection designs requiring automated assembly and thermal robustness.
Availability
1N5356/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, telecom line protection, and programmable logic controller input conditioning requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5356/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, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized voltage regulation and transient suppression in mission-critical power systems where thermal stability, surge resilience, and long-term parametric consistency are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5356/TR12?
The 1N5356/TR12 has a ±5% Zener voltage tolerance, confirmed by the "B" suffix in its part number per Microsemi's datasheet. This means its regulation voltage falls between 18.05 V and 19.95 V at 65 mA test current and 25°C lead temperature. The 1N5356/TR12 is not rated for tighter tolerances such as ±2% (C suffix) or ±1% (D suffix).
Does the 1N5356/TR12 require dry packing before reflow soldering?
No, the 1N5356/TR12 does not require dry packing. Its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1, meaning it can be stored and processed indefinitely at ambient conditions without baking. This is explicitly stated in the Microsemi datasheet and applies to all 1N5333B–1N5388B devices including the 1N5356/TR12.
What is the maximum steady-state power dissipation of the 1N5356/TR12 on a standard FR4 PCB?
When mounted on a standard FR4 PCB (1 oz copper, 4 mm² pads, 1 mm track width, 25 mm length), the 1N5356/TR12 has a steady-state power rating of 1.47 W at 25°C ambient temperature. This derated value reflects its 85°C/W junction-to-ambient thermal resistance - significantly lower than its 25°C/W junction-to-lead rating, which applies only with 3/8″ lead length heat sinking.
Can the 1N5356/TR12 be used as a direct replacement for the 1N5356B?
Yes, the 1N5356/TR12 is electrically and thermally identical to the 1N5356B, differing only in packaging: the "TR12" suffix denotes EIA-296 tape-and-reel format (12 mm carrier tape), while "B" alone indicates bulk packaging. Both share identical Zener voltage, power rating, impedance, and temperature specifications - making them functionally interchangeable where packaging permits.
What is the surge current rating of the 1N5356/TR12 and how is it defined?
The 1N5356/TR12 has a maximum non-recurrent surge current (IZSM) of 75 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating is verified per Microsemi's test methodology and reflects the device's ability to absorb transient energy without parametric shift or catastrophic failure - critical for overvoltage protection in industrial and telecom applications using the 1N5356/TR12.
1N5356/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:
- ±20%
- 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
1N5356/TR12 FAQ
1.How can I place an order for 1N5356/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5356/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 1N5356/TR12 reliable?
The price and inventory of 1N5356/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5356/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5356/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5356/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5356/TR12?
1N5356/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5356/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 1N5356/TR12?
For technical support, including 1N5356/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5356/TR12 requirements.
6.How does Aetrix verify that 1N5356/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5356/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 1N5356/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5356/TR12?
All 1N5356/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5356/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 1N5356/TR12 part is unused and in its original packaging.
Return procedure for 1N5356/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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