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Microchip Technology 1N5367B/TR12
- Part No.:
- 1N5367B/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5367B/TR12.pdf
- Description:
- DIODE ZENER 43V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,215
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Product details
Overview
1N5367B/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 43 V, ±5% tolerance (B suffix), 30 mA test current, 20 Ω maximum dynamic impedance at IZT, and 190 mA maximum Zener current (IZM) when adequately heat-sunk. It serves as a precision voltage reference or shunt regulator in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N5367B/TR12 datasheet, 1N5367B/TR12 pinout, 1N5367B/TR12 application, or 1N5367B/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (190 A), low voltage regulation (ΔVZ = 2.8 V), and RoHS-compliant e3 packaging with TR12 tape-and-reel delivery.
Technical Context
The 1N5367B/TR12 operates as a reverse-biased shunt regulator, maintaining stable 43 V output across a wide operating current range (30 mA to 190 mA) and temperature span (–65 °C to +150 °C). Its low dynamic impedance (20 Ω) ensures minimal voltage deviation under load transients.
Designed for axial-lead mounting on FR4 PCBs or chassis heat sinking, it achieves 1.47 W steady-state dissipation at TA = 25 °C with defined copper pad layout, while delivering full 5 W at TL = 25 °C with 10 mm lead length. Polarity is marked by cathode band; operation requires banded end positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43 V ±5% - defines precise regulation point for feedback or clamping at nominal 43 V |
| Test Current (IZT) | 30 mA - standardized bias point where VZ and ZZ are specified |
| Dynamic Impedance (ZZ) | 20 Ω max - limits voltage shift under current variation; critical for regulation stability |
| Max Zener Current (IZM) | 190 mA - maximum continuous DC current before thermal runaway with proper heat sinking |
| Voltage Regulation (ΔVZ) | 2.8 V - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity |
| Surge Current (IZSM) | 190 A - peak non-repetitive 8.3 ms half-sine current handling for transient suppression |
| Thermal Resistance | 25 °C/W junction-to-lead - enables 5 W dissipation with modest heatsinking at 3/8″ lead length |
| Forward Voltage | 1.2 V max @ 1.0 A - ensures low-loss forward conduction if used in bidirectional protection |
Pinout & Package
Package: T-18 axial-leaded plastic case per JEDEC DO-204AL standard; void-free UL94V-0 epoxy body; tin-lead or RoHS-compliant matte-tin plating; cathode indicated by color band; weight 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to system ground or lower-potential rail; forms return path for Zener current |
| Cathode (banded end) | Regulated output node | Provides stable 43 V reference when reverse-biased; connected to feedback point or clamp target |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 5 W Zener | Guarantees mechanical and electrical compliance with industry-standard DO-204AL footprint and ratings |
| ±5% voltage tolerance (B suffix) | Enables tighter regulation than ±10% (A) or ±20% (no suffix) variants without premium cost |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and bake-out prior to assembly; simplifies SMT/reflow logistics |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-safe workstations during manual assembly |
| Tape-and-reel packaging (TR12) | Supports automated pick-and-place insertion with standard 12 mm carrier tape and 1000 pcs/reel quantity |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp for 48 V Systems |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback loop using optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Shunt reference providing precise 43 V threshold to control PWM duty cycle via secondary-side error signal. Use Value: Maintains ±1% output regulation across line/load/temperature with low ΔVZ and stable ZZ under varying IZT conditions. | Use Scenario: Protects downstream 48 V telecom or industrial bus components from transient overvoltage events exceeding 50 V. IC Role / Device Role / Timing Role: Fast-acting shunt clamp that conducts above 43 V to divert surge energy away from sensitive ICs. Use Value: Absorbs 190 A 8.3 ms surges without failure, leveraging high IZSM and robust thermal design to prevent thermal runaway. |
| Programmable Voltage Reference | DC Link Voltage Monitor |
Use Scenario: Provides stable 43 V reference for ADC input scaling or DAC output calibration in test equipment. IC Role / Device Role / Timing Role: Precision analog reference source with low temperature coefficient and tight initial tolerance. Use Value: Delivers <±0.1%/°C drift and 2.8 V regulation spread across operating current range, enabling 12-bit measurement accuracy. | Use Scenario: Monitors high-voltage DC link (e.g., 60 V nominal) in motor drives or solar inverters for overvoltage shutdown. IC Role / Device Role / Timing Role: Threshold detector triggering protection logic when DC link exceeds safe 43 V margin. Use Value: Ensures reliable trip point with minimal hysteresis due to low ZZ and stable VZ across –40 °C to +85 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5367B (bulk) | Identical electrical specs; differs only in packaging-bulk vs. TR12 tape-and-reel | No change in circuit function or layout; differs only in assembly method and inventory handling | Select 1N5367B/TR12 for automated SMT lines; choose bulk 1N5367B for hand-soldered prototypes or low-volume repair |
| MMBZ5265B (SOT-23) | Same 43 V ±5%, but rated at 0.5 W; surface-mount; higher ZZ (35 Ω); lower IZM (12 mA) | Not suitable for 5 W power dissipation; limited to low-current biasing or signal-level clamping | Use MMBZ5265B only in space-constrained, low-power designs where thermal management precludes axial-leaded devices |
Compared with 1N5367B/TR12, the bulk 1N5367B offers identical performance with manual handling flexibility, while MMBZ5265B trades power capability for miniaturization-making 1N5367B/TR12 the sole choice for 5 W regulated clamping or reference duties requiring axial thermal path.
Availability
1N5367B/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable voltage references requiring stable component supply and RoHS-compliant packaging.
Supply support for 1N5367B/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 timing solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal robustness, surge resilience, and long-term parametric stability under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N5367B/TR12?
The 1N5367B/TR12 has a Zener voltage tolerance of ±5%, as indicated by the "B" suffix in its part number. This means its actual regulation voltage falls within 40.85 V to 45.15 V at 30 mA test current and 25 °C lead temperature. The tolerance is guaranteed per JEDEC specification and verified during production testing.
Can the 1N5367B/TR12 be used without a heatsink?
The 1N5367B/TR12 can operate at up to 1.47 W continuously without external heatsinking when mounted on a standard FR4 PCB with 4 mm² copper pads and 1 mm track width, per manufacturer's thermal characterization. Full 5 W dissipation requires TL ≤ 25 °C at 10 mm lead length from body-typically achieved with chassis or clip-on heatsinking.
Is the 1N5367B/TR12 RoHS compliant?
Yes, the 1N5367B/TR12 is RoHS compliant, as confirmed by the "e3" suffix in its full manufacturer designation (1N5367B/TR12, e3). It uses annealed matte-tin plating instead of tin-lead, meeting EU Directive 2011/65/EU requirements without exemption.
What does the "TR12" suffix indicate in 1N5367B/TR12?
The "TR12" suffix indicates tape-and-reel packaging per EIA-296 standard: 12 mm carrier tape width, 1000 units per reel, and orientation optimized for automated pick-and-place equipment. This format supports high-throughput SMT assembly and eliminates manual handling of axial-leaded components.
How is polarity identified on the 1N5367B/TR12?
Polarity on the 1N5367B/TR12 is marked by a single color band near one end of the axial package-this is the cathode terminal. For correct operation as a Zener regulator, the banded (cathode) end must be held at a higher potential than the unbanded (anode) end. Reversing polarity results in forward conduction at ~1.2 V.
1N5367B/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):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 31 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
1N5367B/TR12 FAQ
1.How can I place an order for 1N5367B/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5367B/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 1N5367B/TR12 reliable?
The price and inventory of 1N5367B/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5367B/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5367B/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5367B/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5367B/TR12?
1N5367B/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5367B/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 1N5367B/TR12?
For technical support, including 1N5367B/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5367B/TR12 requirements.
6.How does Aetrix verify that 1N5367B/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5367B/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 1N5367B/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5367B/TR12?
All 1N5367B/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5367B/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 1N5367B/TR12 part is unused and in its original packaging.
Return procedure for 1N5367B/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5367B/TR12 Tags
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