My Inquiry
My Account
Microchip Technology 1N5340B/TR12
- Part No.:
- 1N5340B/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5340B/TR12.pdf
- Description:
- DIODE ZENER 6V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:4,767
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5340B/TR12 from Microsemi is a 5.0 W axial-leaded silicon Zener diode with 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 power supply feedback loops.
For engineers reviewing the 1N5340B/TR12 datasheet, 1N5340B/TR12 pinout, 1N5340B/TR12 application, or 1N5340B/TR12 equivalent, key selection criteria include its ±5% tolerance, low 1.0 Ω impedance at 200 mA, 790 mA IZM rating with adequate heatsinking, RoHS-compliant matte-tin plating, and T-18 axial package compatibility with through-hole PCB assembly.
Technical Context
This device functions as a two-terminal voltage regulator diode operating in reverse breakdown mode. Its Zener voltage is specified at 200 mA DC test current (IZT) with measurement performed within 40 ±10 ms after current application, and it exhibits minimal voltage variation (ΔVZ = 0.19 V) between 10% and 50% of IZM.
The 1N5340B/TR12 features a thermal resistance of 25 °C/W junction-to-lead (at 10 mm lead length) and 85 °C/W junction-to-ambient on FR4 board, enabling stable regulation under sustained 5.0 W dissipation when properly mounted. Its cathode is marked by a band, requiring the banded end to be biased positive relative to the anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.0 V ±5% - precise regulation point for feedback sensing in 5–12 V power rails |
| Test Current (IZT) | 200 mA - standard bias condition for VZ specification and impedance measurement |
| Dynamic Impedance (ZZ) | 1.0 Ω max - ensures minimal output voltage shift under load transients |
| Max Zener Current (IZM) | 790 mA - maximum continuous reverse current at TL = 25°C with proper heatsinking |
| Power Dissipation | 5.0 W at TL < 25°C - requires 10 mm lead length or external heatsink for full rating |
| Voltage Regulation (ΔVZ) | 0.19 V - difference between VZ measured at 10% and 50% of IZM, indicating tight regulation linearity |
| Reverse Leakage (IR) | 1.0 μA max at VR = 3.0 V - low off-state current preserves efficiency in standby modes |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-41 outline; void-free UL94V-0 epoxy body; cathode indicated by single black band; leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to circuit ground or lower-potential rail; reverse-biased operation requires this terminal negative relative to cathode |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to feedback node or voltage reference point; must be held positive relative to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard DO-41 mechanical and electrical definitions for interchangeability |
| ±5% voltage tolerance (B suffix) | Reduces calibration overhead in mid-precision voltage reference designs without requiring trimming |
| Low 1.0 Ω dynamic impedance | Maintains regulation stability across 200 mA ±100 mA load variations in feedback paths |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for SMT-compatible handling |
| RoHS-compliant (e3 suffix) | Meets global environmental compliance without performance trade-offs or derating |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Primary-side voltage reference element providing stable 6.0 V reference to TL431 or similar shunt regulator. Use Value: Enables accurate ±5% output regulation without secondary-side sensing, leveraging 1N5340B/TR12's low ΔVZ and stable VZ over temperature. |
Use Scenario: Clamping transient surges on 5 V or 12 V logic rails to prevent IC damage during ESD or inductive switching events. IC Role / Device Role / Timing Role: Passive overvoltage protection device placed between rail and ground, conducting only above 6.0 V threshold. Use Value: Absorbs up to 5.0 W surge energy with 790 mA IZM capability, limiting peak voltage to ≤6.19 V (VZ + ΔVZ) during clamping. |
| Industrial Sensor Excitation | Reference Voltage Generator |
Use Scenario: Providing stable excitation voltage to resistive bridge sensors (e.g., strain gauges, RTDs) in harsh environments. IC Role / Device Role / Timing Role: Low-noise, thermally stable voltage source replacing active references where cost and simplicity are prioritized. Use Value: Delivers 6.0 V ±5% over –65°C to +150°C with <0.19 V regulation spread, minimizing sensor offset drift. |
Use Scenario: Generating fixed reference for ADCs, comparators, or analog front-ends in embedded control modules. IC Role / Device Role / Timing Role: Two-terminal passive reference node tied to high-impedance input, drawing minimal quiescent current. Use Value: Achieves 1.0 μA IR at 3.0 V, ensuring negligible loading error on high-Z inputs while maintaining 6.0 V accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5340B (bulk) | Identical electrical specs; differs only in packaging - bulk vs. tape-and-reel (TR12) | No functional difference; TR12 enables automated pick-and-place; bulk suits manual prototyping or low-volume repair | Select 1N5340B/TR12 for SMT production lines requiring EIA-296 compliant tape; choose bulk for hand-soldered builds. |
| MMBZ5234B (SOT-23) | Same 6.0 V ±5% rating but rated at 0.5 W; surface-mount; 10x smaller footprint; higher ZZ (15 Ω) | Not suitable for >100 mW continuous dissipation; limited to low-power signal-level referencing, not power rail regulation | Choose MMBZ5234B only for space-constrained, low-current (<10 mA) reference nodes; 1N5340B/TR12 remains required for 5 W applications. |
Compared with 1N5340B (bulk) and MMBZ5234B, the 1N5340B/TR12 uniquely combines JEDEC-standard axial packaging, 5.0 W power handling, ±5% tolerance, and EIA-296 tape-and-reel delivery-making it the sole option for high-reliability, through-hole, production-scale voltage regulation where thermal mass and mechanical robustness matter.
Availability
1N5340B/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, and overvoltage protection circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5340B/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, high-power voltage regulation 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 1N5340B/TR12?
The 1N5340B/TR12 has a Zener voltage tolerance of ±5%, as indicated by the "B" suffix in its part number. This means its actual breakdown voltage falls between 5.7 V and 6.3 V when measured at 200 mA DC test current and 25°C lead temperature. This tolerance is tighter than the ±10% "A" suffix variant and supports mid-precision regulation without trimming.
Can the 1N5340B/TR12 be used in surface-mount designs?
No, the 1N5340B/TR12 uses a T-18 axial-leaded package (JEDEC DO-41 outline) intended for through-hole mounting. For surface-mount equivalents, Microsemi offers the SMBJ5340B or SMBG5340B in SMB/SMBG packages - these share identical electrical specs but require different PCB land patterns and reflow profiles.
What is the maximum continuous power dissipation for the 1N5340B/TR12?
The 1N5340B/TR12 is rated for 5.0 W maximum power dissipation at a lead temperature (TL) of 25°C with 10 mm lead length from the body. Derating is required above 25°C - approximately 40 mW/°C - and on FR4 boards without heatsinking, its steady-state rating drops to 1.47 W at 25°C ambient due to higher junction-to-ambient thermal resistance (85 °C/W).
How does the 1N5340B/TR12 behave under surge conditions?
The 1N5340B/TR12 supports a maximum non-recurrent surge current (IZSM) of 12.7 A for an 8.3 ms half-sine waveform. This enables reliable clamping of short-duration transients such as ESD or inductive kickback. Its ability to absorb this energy depends on thermal mass and PCB copper area - sustained surges exceeding 5.0 W average power will cause thermal runaway.
Is the 1N5340B/TR12 RoHS compliant?
Yes, the 1N5340B/TR12 carries the "e3" suffix in its full manufacturer designation (1N5340B/TR12 e3), confirming RoHS compliance per EU Directive 2011/65/EU. Its leads are plated with annealed matte tin, and its void-free epoxy body meets UL94V-0 flammability requirements without brominated flame retardants.
1N5340B/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:
- ±5%
- 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
1N5340B/TR12 FAQ
1.How can I place an order for 1N5340B/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5340B/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 1N5340B/TR12 reliable?
The price and inventory of 1N5340B/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5340B/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5340B/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5340B/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5340B/TR12?
1N5340B/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5340B/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 1N5340B/TR12?
For technical support, including 1N5340B/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5340B/TR12 requirements.
6.How does Aetrix verify that 1N5340B/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5340B/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 1N5340B/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5340B/TR12?
All 1N5340B/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5340B/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 1N5340B/TR12 part is unused and in its original packaging.
Return procedure for 1N5340B/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5340B/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…
