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Microchip Technology 1N5340/TR12
- Part No.:
- 1N5340/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5340/TR12.pdf
- Description:
- DIODE ZENER 6V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:4,290
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Product details
Overview
1N5340/TR12 from Microsemi is a 5.0 W axial-leaded silicon Zener diode with a nominal regulation voltage of 6.0 V ±5%, 200 mA test current (IZT), 1.0 Ω maximum dynamic impedance (ZZ), and 790 mA maximum Zener current (IZM) at TL = 25°C. It operates from –65°C to +150°C and is used for precision voltage reference and overvoltage protection in DC power supplies.
For engineers reviewing the 1N5340/TR12 datasheet, 1N5340/TR12 pinout, 1N5340/TR12 application, or 1N5340/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (12.7 A), voltage regulation (ΔVZ = 0.19 V), and RoHS-compliant e3 marking compatibility.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output voltage across wide operating current ranges (1.0 mA to 790 mA). Its low dynamic impedance (1.0 Ω) and tight ±5% tolerance ensure minimal voltage drift under load variation.
The 1N5340/TR12 uses a void-free thermosetting epoxy T-18 package with tin-lead or matte-tin plating, rated for 260°C soldering (10 s), and features cathode band polarity marking. It meets MIL-STD-750 ESD immunity (Method 1020) and IPC/JEDEC J-STD-020B moisture level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.0 V ±5% - precise regulation point for 5 V–6 V rail stabilization |
| Test Current (IZT) | 200 mA - defined operating point for VZ measurement and thermal design |
| Max Dynamic Impedance (ZZ) | 1.0 Ω - ensures <100 mV output shift per 100 mA load change near IZT |
| Max Zener Current (IZM) | 790 mA - maximum continuous DC current with adequate heat sinking at TL = 25°C |
| Thermal Resistance (RθJL) | 25 °C/W - junction-to-lead value enabling thermal modeling for PCB trace heatsinking |
| Surge Current (IZSM) | 12.7 A - peak non-repetitive half-sine (8.3 ms) capability for transient suppression |
| Voltage Regulation (ΔVZ) | 0.19 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
Pinout & Package
T-18 axial-leaded plastic package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026. Moisture sensitivity level 1 - no dry pack required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node when regulating; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to regulated rail; defines 6.0 V reference relative to anode under reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB series mechanical and electrical definitions |
| ±5% voltage tolerance (B suffix) | Reduces calibration overhead in mid-precision analog references and feedback loops |
| Low dynamic impedance (1.0 Ω) | Enables stable regulation under fast load transients without external compensation |
| High surge current (12.7 A) | Provides inherent clamping for 8.3 ms line surges without external TVS staging |
| Level 1 moisture sensitivity | Eliminates baking requirement before SMT reflow or manual assembly |
Applications
| DC Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing 6 V reference in linear regulator feedback networks or low-power SMPS auxiliary rails. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference providing stable 6.0 V setpoint independent of input ripple. Use Value: Maintains ±0.3 V regulation over 10–790 mA operating range, reducing need for op-amp-based references. | Use Scenario: Clamping transient spikes on 5 V logic supply lines exposed to ESD or inductive switching noise. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy above 6.0 V to ground during overvoltage events. Use Value: Withstands 12.7 A surge (8.3 ms) without degradation, eliminating need for secondary TVS devices. |
| Industrial Sensor Excitation | Automotive Body Control Module Reference |
Use Scenario: Providing excitation voltage to resistive temperature detectors (RTDs) or strain gauges in 4–20 mA transmitter front-ends. IC Role / Device Role / Timing Role: Precision voltage source establishing known bias point for ratiometric measurements. Use Value: ±5% tolerance and 0.19 V regulation error enable sub-0.5% total measurement uncertainty in calibrated systems. | Use Scenario: Generating stable 6 V reference for microcontroller ADCs and CAN transceiver bias in 12 V automotive subsystems. IC Role / Device Role / Timing Role: Temperature-stable shunt regulator compensating for battery voltage fluctuations. Use Value: Operates from –65°C to +150°C and maintains regulation within 0.19 V across full temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5340B | No TR12 tape-and-reel packaging; bulk or ammo pack only; identical electrical specs | Lacks automated placement compatibility; suitable for hand-solder or wave-solder production | Select 1N5340/TR12 for SMT pick-and-place; choose 1N5340B for low-volume prototyping or repair |
| MMBZ5234B-TP | Surface-mount SOT-23 package; 6.0 V ±5%; 200 mW max power; 100 mA IZM | Not interchangeable due to 25× lower power rating and different thermal path; limited to signal-level regulation | Use MMBZ5234B-TP only in low-current (<50 mA), space-constrained designs where 5 W dissipation is unnecessary |
Compared with 1N5340B and MMBZ5234B-TP, the 1N5340/TR12 uniquely combines JEDEC-standard axial packaging, 5 W power handling, tape-and-reel automation support, and industrial temperature range - making it optimal for high-reliability power rail regulation where thermal margin and manufacturability are critical.
Availability
1N5340/TR12 is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection circuits, and industrial sensor excitation requiring stable component supply and long-term lifecycle continuity.
Supply support for 1N5340/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 as a ruggedized, high-power Zener solution for mission-critical voltage regulation where thermal stability, surge resilience, and long-term parametric consistency are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5340/TR12?
The 1N5340/TR12 has a nominal Zener voltage of 6.0 V with a ±5% tolerance, as indicated by the "B" suffix in its full designation. This means the actual regulation voltage falls between 5.7 V and 6.3 V at 200 mA test current and 25°C lead temperature. The 1N5340/TR12 is not rated for tighter tolerances such as ±2% or ±1% - those require C or D suffix variants.
Can the 1N5340/TR12 be used in surface-mount designs?
No, the 1N5340/TR12 is an axial-leaded T-18 package device and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5340B or SMBG5340B in DO-214AA/DO-214AB packages. The 1N5340/TR12 requires through-hole mounting with ≥10 mm lead length from body for thermal derating compliance.
What is the maximum steady-state power dissipation for the 1N5340/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 1N5340/TR12 has a steady-state power rating of 1.47 W at 25°C ambient temperature. This is derived from its 85 °C/W junction-to-ambient thermal resistance. Derating is required above 25°C - consult Figure 1 in the Microsemi datasheet for exact curve.
Does the 1N5340/TR12 meet RoHS requirements?
Yes, the 1N5340/TR12 carries the "e3" suffix per Microsemi documentation, confirming RoHS compliance with lead-free matte-tin plating. It satisfies EU Directive 2011/65/EU and is exempt from exemption 7a. The device contains no intentionally added lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits.
What is the forward voltage specification for the 1N5340/TR12?
The 1N5340/TR12 has a maximum forward voltage of 1.2 V at 1.0 A forward current, per Microsemi's published electrical characteristics. This parameter applies only during forward conduction - the device is intended for reverse-biased Zener operation. Forward voltage is relevant for polarity-check circuits or anti-parallel protection configurations.
1N5340/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):
- 6 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 3 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
1N5340/TR12 FAQ
1.How can I place an order for 1N5340/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5340/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 1N5340/TR12 reliable?
The price and inventory of 1N5340/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5340/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5340/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5340/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5340/TR12?
1N5340/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5340/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 1N5340/TR12?
For technical support, including 1N5340/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5340/TR12 requirements.
6.How does Aetrix verify that 1N5340/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5340/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 1N5340/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5340/TR12?
All 1N5340/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5340/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 1N5340/TR12 part is unused and in its original packaging.
Return procedure for 1N5340/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5340/TR12 Tags
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