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Vishay General Semiconductor - Diodes Division 1N6268-E3/54
- Part No.:
- 1N6268-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6268-E3/54.pdf
- Description:
- TVS DIODE 6.05VWM 11.7VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,363
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Product details
Overview
1N6268-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 7.13 V to 7.88 V breakdown voltage (VBR) at 10 mA, 6.40 V standoff voltage (VWM), 11.3 V clamping voltage (VC) at 133 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates across -55 °C to +175 °C junction temperature range - deployed in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the 1N6268-E3/54 datasheet, 1N6268-E3/54 pinout, 1N6268-E3/54 application, or 1N6268-E3/54 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping performance under surge conditions, thermal resistance data, and direct alternative part comparisons for robust ESD and lightning transient design.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance. Its clamping action begins at 6.40 V (VWM) and limits transients to ≤11.3 V at 133 A (10/1000 µs), enabling reliable protection of downstream MOSFETs and ICs without crowbar behavior. The device meets JEDEC 1.5KE mechanical outline and supports soldering per J-STD-002 with matte tin-plated leads.
Rated for 1500 W non-repetitive peak pulse power and 6.5 W steady-state dissipation on infinite heatsink, it sustains 200 A forward surge (8.3 ms half-sine) and exhibits 0.061 %/°C VBR temperature coefficient. Its 75 °C/W junction-to-ambient thermal resistance requires careful PCB copper area planning for sustained surge duty cycles above 0.01 %.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 7.13 V / 7.88 V at 10 mA - defines precise conduction onset threshold for overvoltage detection |
| VWM | 6.40 V - maximum continuous reverse operating voltage before leakage exceeds 500 µA |
| VC @ IPPM | 11.3 V at 133 A - clamped voltage during worst-case 10/1000 µs surge, limiting stress on protected ICs |
| PPPM | 1500 W - peak transient energy absorption capability, critical for lightning and inductive switch-off events |
| IFSM | 200 A - single half-sine surge current rating (8.3 ms), supporting high-energy fault clearing in power supplies |
| TJ Range | -55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments without derating |
| RθJA | 75 °C/W - dictates minimum copper pour area required on PCB for thermal management at 6.5 W steady-state |
Pinout & Package
Package: JEDEC 1.5KE molded epoxy case (Case Style 1.5KE), axial leaded, RoHS-compliant matte tin plating, UL 94 V-0 rated molding compound. Dimensions: 5.3 mm diameter × 9.5 mm length (0.210" × 0.375"), lead spacing 7.2 mm (0.285").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., GND or return path); polarity-sensitive for unidirectional operation |
| Cathode | Reverse-biased terminal (marked with band) | Connected to protected line (e.g., +12 V rail); conducts when transient exceeds VWM, shunting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5 %) and long-term reliability under humidity and thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Handles automotive load-dump surges (ISO 7637-2 Pulse 5a) and industrial inductive kickback without failure |
| Clamping ratio (VC/VBR) ≈ 1.48 | Minimizes voltage overshoot during clamping - critical for protecting 5 V or 3.3 V logic interfaces |
| AEC-Q101 qualified option available (HE3 suffix) | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
| Low 0.061 %/°C VBR tempco | Maintains consistent clamping threshold across wide ambient temperatures, reducing design margin uncertainty |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to ISO 7637-2 load dump pulses up to 120 V for 400 ms. IC Role / Device Role / Timing Role: Primary shunt protector placed between battery rail and DC-DC converter input, clamping transients within 1 ns. Use Value: Limits input voltage to ≤11.3 V during 133 A surge, preventing damage to upstream PMICs and ensuring system reset integrity. |
Use Scenario: 4–20 mA current loop sensors in factory automation subject to EFT bursts and cable-induced surges. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; unidirectional 1N6268-E3/54 protects loop supply side against positive-going transients only. Use Value: Clamps induced spikes before they reach precision op-amps or ADC front-ends, preserving measurement accuracy and avoiding latch-up. |
| Consumer Power Adapter Output Protection | Telecom Line Interface Surge Suppression |
Use Scenario: USB-C PD adapter secondary-side 5 V/9 V/15 V outputs vulnerable to hot-plug transients and capacitor discharge spikes. IC Role / Device Role / Timing Role: Final-stage TVS placed immediately before connector, absorbing <100 ns rise-time events before reaching connected devices. Use Value: Prevents catastrophic failure of USB controller ICs by limiting output overshoot to 11.3 V even during 133 A surge events. |
Use Scenario: DSL or Ethernet PHY interfaces connected to outdoor wiring susceptible to induced lightning surges (IEC 61000-4-5 Level 4). IC Role / Device Role / Timing Role: First-line defense in hybrid protection circuit (with gas discharge tube and series impedance), handling fast-rising edge energy. Use Value: Absorbs initial 1500 W surge energy within nanoseconds, allowing slower GDT to extinguish follow-on current and protect PHY transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A | Lower PPPM (600 W), smaller SMB package (3.5 mm × 4.6 mm), VC = 11.2 V @ 53.3 A | Better suited for space-constrained PCBs; insufficient for 1500 W load-dump events | Select when board area is critical and surge energy is limited to ≤600 W (e.g., low-power IoT nodes) |
| 1.5KE7.5A | Identical electrical specs and JEDEC 1.5KE package; E3/54 tape-and-reel packaging matches 1N6268-E3/54 | No functional difference - same Vishay device, alternate manufacturer prefix | Drop-in replacement with identical VBR, VC, and thermal performance; preferred for dual-sourcing flexibility |
Compared with SMBJ7.0A, 1N6268-E3/54 delivers 2.5× higher surge energy handling in the same application class but requires larger PCB footprint; versus 1.5KE7.5A, it offers identical protection performance with no layout or thermal redesign needed.
Availability
1N6268-E3/54 is available at Aetrix Electronics and suitable for automotive power systems, industrial sensor interfaces, consumer power adapters, and telecom line protection requiring stable component supply across multi-year production cycles.
Supply support for 1N6268-E3/54 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The 1N6268-E3/54 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments where fast response, stable clamping, and long-term parametric stability are mandatory.
FAQ
What is the breakdown voltage range of the 1N6268-E3/54?
The 1N6268-E3/54 has a guaranteed breakdown voltage (VBR) range of 7.13 V to 7.88 V at a test current of 10 mA, measured per JEDEC standards. This tight tolerance ensures predictable turn-on behavior during overvoltage events and supports accurate system-level margining for protected circuits. The 1N6268-E3/54 maintains this specification across its full operating temperature range (-55 °C to +175 °C) with a temperature coefficient of 0.061 %/°C.
Does the 1N6268-E3/54 support automotive qualification?
The 1N6268-E3/54 itself is commercial-grade; however, Vishay offers the functionally identical AEC-Q101 qualified version as 1N6268AHE3_B (or 1.5KE7.5AHE3_B). That variant undergoes stress testing per AEC-Q101 including HTGB, HTRB, and temperature cycling, making it suitable for automotive powertrain and body electronics. The 1N6268-E3/54 remains appropriate for non-automotive industrial and consumer applications requiring high surge immunity.
What is the clamping voltage of the 1N6268-E3/54 under maximum surge conditions?
The 1N6268-E3/54 clamps to a maximum of 11.3 V when subjected to its rated peak pulse current of 133 A (10/1000 µs waveform). This clamping voltage is measured at the device terminals and represents the upper limit of voltage seen by downstream components during worst-case transient events. The low clamping ratio (VC/VBR ≈ 1.48) ensures minimal overvoltage stress on protected 5 V or 3.3 V logic circuits.
Can the 1N6268-E3/54 be used in bidirectional configurations?
No - the 1N6268-E3/54 is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the 1N6268CA (or 1.5KE7.5CA) variant, which suppresses transients in both polarities and lacks polarity marking. Using the unidirectional 1N6268-E3/54 in AC or floating signal paths risks forward conduction and failure; always match device polarity to circuit topology.
What is the thermal resistance and how does it affect PCB layout for the 1N6268-E3/54?
The 1N6268-E3/54 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W. To maintain safe operation at its 6.5 W steady-state power dissipation limit, PCB layout must include substantial copper area (≥1 in² recommended) connected to both leads, especially the cathode. Without adequate copper pour, junction temperature can exceed 175 °C during prolonged surge recovery, accelerating parameter drift and reducing lifetime. Thermal vias under pads further improve heat spreading.
1N6268-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.05V
- Voltage - Breakdown (Min):
- 6.75V
- Voltage - Clamping (Max) @ Ipp:
- 11.7V
- Current - Peak Pulse (10/1000µs):
- 128A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1N6268-E3/54 FAQ
1.How can I place an order for 1N6268-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6268-E3/54 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 1N6268-E3/54 reliable?
The price and inventory of 1N6268-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6268-E3/54 is usually 5 days.
3.What payment methods are accepted for 1N6268-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6268-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6268-E3/54?
1N6268-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6268-E3/54 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 1N6268-E3/54?
For technical support, including 1N6268-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6268-E3/54 requirements.
6.How does Aetrix verify that 1N6268-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1N6268-E3/54 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 1N6268-E3/54 meets industry standards.
7.What is the process for return or replacement of 1N6268-E3/54?
All 1N6268-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6268-E3/54, 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 1N6268-E3/54 part is unused and in its original packaging.
Return procedure for 1N6268-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6268-E3/54 Tags
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