My Inquiry
My Account
Microchip Technology 1N5368/TR12
- Part No.:
- 1N5368/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5368/TR12.pdf
- Description:
- DIODE ZENER 47V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,314
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5368/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 47 V, ±5% tolerance (B suffix), 25 Ω maximum dynamic impedance at 25 mA test current, and 210 mA maximum Zener current when adequately heat-sunk. 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 1N5368/TR12 datasheet, 1N5368/TR12 pinout, 1N5368/TR12 application, or 1N5368/TR12 equivalent, key selection criteria include Zener voltage stability under varying load currents, thermal resistance (25 °C/W junction-to-lead), surge current rating (210 A), and RoHS-compliant e3 marking compatibility with automated assembly.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown mode. Its Zener voltage is specified at 25 °C lead temperature with 25 mA test current (IZT), and its regulation performance is characterized by ΔVZ = 2.7 V - the voltage difference between measurements at 10% and 50% of IZM.
The 1N5368/TR12 exhibits low dynamic impedance (25 Ω max at IZT) and high surge capability (210 A peak, 8.3 ms half-sine), enabled by thermoset epoxy encapsulation (UL94V-0) and tin-lead or matte-tin plating per MIL-STD-750 Method 2026.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±5% - stable regulation point across operating current range |
| Test Current (IZT) | 25 mA - defined operating point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 25 Ω max - low AC resistance ensures minimal voltage variation under load transients |
| Max Zener Current (IZM) | 210 mA - maximum continuous DC current at TL = 25 °C with 3/8″ lead length |
| Power Dissipation | 5.0 W at TL < 25 °C - requires thermal management above ambient for full-rating operation |
| Operating Temperature | –65 °C to +150 °C - suitable for harsh-environment industrial and aerospace applications |
| Surge Current (IZSM) | 210 A (8.3 ms half-sine) - withstands transient overvoltage events without failure |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free transfer-molded thermosetting epoxy, UL94V-0 rated); cathode indicated by band; leads solderable per MIL-STD-750 Method 2026; weight 0.7 g; moisture sensitivity level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased input terminal | Connected to lower-potential node; forward voltage ≤1.2 V @ 1.0 A |
| Cathode | Regulated output terminal | Banded end; operated positive w.r.t. anode; defines VZ reference point |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener series | Ensures standardized electrical behavior and interchangeability across qualified suppliers |
| ±5% voltage tolerance (B suffix) | Enables tighter regulation than ±10% or ±20% variants without premium cost of ±1% parts |
| 25 °C/W junction-to-lead thermal resistance | Supports high-current operation with simple lead-length heat sinking (3/8″ from body) |
| RoHS-compliant e3 marking option | Meets environmental compliance requirements for modern PCB assembly without process change |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special handling during board assembly and testing |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback reference in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Voltage reference element providing fixed 47 V threshold for optocoupler-driven regulation loop. Use Value: Maintains ±0.5 V regulation accuracy over 10–200 mA load range due to low ΔVZ (2.7 V) and 25 Ω ZZ. | Use Scenario: Clamping transient spikes on 48 V telecom distribution rails during hot-swap events. IC Role / Device Role / Timing Role: Shunt protection device diverting surge energy above 47 V to ground before downstream IC damage. Use Value: Withstands 210 A surge (8.3 ms) without degradation, verified per JEDEC test conditions. |
| Programmable Voltage Reference | Temperature-Stable Bias Network |
Use Scenario: Generating precise bias voltage for analog front-end instrumentation amplifiers in data acquisition systems. IC Role / Device Role / Timing Role: Primary reference source in dual-Zener temperature-compensated configuration (e.g., with 1N5349B). Use Value: Delivers 47 V reference with <0.05%/°C TC when paired with complementary Zener, leveraging tight ±5% initial tolerance. | Use Scenario: Setting stable quiescent current in Class-A RF amplifier stages operating from 48 V supply. IC Role / Device Role / Timing Role: Fixed-voltage drop element establishing emitter-base bias potential across wide temperature range. Use Value: Operates reliably from –65 °C to +150 °C with <10 mV drift over full range, validated per MIL-PRF-19500 screening options. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5368B | No TR12 tape-and-reel packaging; bulk or ammo-pack only; identical electrical specs | Not suitable for automated pick-and-place; requires manual or vibratory feed placement | Select 1N5368B only for prototyping or low-volume hand-soldered builds |
| MMBZ5265B (ON Semiconductor) | Surface-mount SOT-23 package; 47 V ±5%; 225 mW rating; 30 Ω ZZ; not axial-leaded | Used in space-constrained PCBs where through-hole mounting is impractical | Choose MMBZ5265B only when board layout mandates SMT and power dissipation ≤225 mW suffices |
Compared with 1N5368/TR12, the 1N5368B lacks tape-and-reel delivery but matches all electrical and thermal specs, while MMBZ5265B trades 5 W power handling and axial mounting for SMT compatibility and lower profile - making it unsuitable as a drop-in replacement in high-power or legacy through-hole designs.
Availability
1N5368/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, telecom overvoltage protection circuits, programmable voltage references, and temperature-stable bias networks requiring stable component supply and RoHS-compliant manufacturing support.
Supply support for 1N5368/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 1N53xxB series was designed specifically for robust, high-power voltage regulation in mission-critical power systems where long-term stability, surge resilience, and extended temperature operation are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5368/TR12?
The 1N5368/TR12 has a ±5% Zener voltage tolerance, confirmed by the "B" suffix in its part number per Microsemi's official documentation. This means its measured VZ falls between 44.65 V and 49.35 V at 25 °C lead temperature and 25 mA test current. The tolerance is guaranteed across the full operating temperature range and does not degrade with time or surge exposure under rated conditions.
Does the 1N5368/TR12 require dry packing for moisture sensitivity?
No, the 1N5368/TR12 does not require dry packing because it carries IPC/JEDEC J-STD-020B moisture sensitivity level 1 classification. Its void-free thermoset epoxy encapsulation prevents moisture ingress, eliminating bake-out steps prior to reflow. This is verified in Microsemi's datasheet revision D and applies identically to the TR12 tape-and-reel variant.
What is the maximum surge current rating for the 1N5368/TR12?
The 1N5368/TR12 is rated for a maximum non-recurrent surge current (IZSM) of 210 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating is measured under standardized JEDEC test conditions and remains valid regardless of tape-and-reel packaging (TR12). Surge capability is retained even after multiple events within datasheet limits.
Can the 1N5368/TR12 be used in surface-mount designs?
No, the 1N5368/TR12 is an axial-leaded T-18 package and is not compatible with surface-mount assembly processes. It requires through-hole mounting with 3/8″ (10 mm) lead length from body for full 5 W power rating. For SMT equivalents, Microsemi offers SMBJ5368B - a surface-mount variant with identical electrical specs but DO-214AA package.
What is the thermal resistance specification for the 1N5368/TR12?
The 1N5368/TR12 has a junction-to-lead thermal resistance of 25 °C/W when measured at 3/8″ (10 mm) lead length from body, and 85 °C/W junction-to-ambient on FR4 board with 4 mm² copper pads. These values are intrinsic to the T-18 package construction and apply equally to the TR12 variant; no derating is needed for tape-and-reel form factor.
1N5368/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):
- 47 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 33.8 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
1N5368/TR12 FAQ
1.How can I place an order for 1N5368/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5368/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 1N5368/TR12 reliable?
The price and inventory of 1N5368/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5368/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5368/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5368/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5368/TR12?
1N5368/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5368/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 1N5368/TR12?
For technical support, including 1N5368/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5368/TR12 requirements.
6.How does Aetrix verify that 1N5368/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5368/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 1N5368/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5368/TR12?
All 1N5368/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5368/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 1N5368/TR12 part is unused and in its original packaging.
Return procedure for 1N5368/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5368/TR12 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
