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Vishay General Semiconductor - Diodes Division 1N6281A-E3/54
- Part No.:
- 1N6281A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6281A-E3/54.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,182
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Product details
Overview
1N6281A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 27 V breakdown voltage (VBR = 25.7–28.4 V at 1.0 mA), 23.1 V stand-off voltage (VWM), 37.5 V clamping voltage (VC) at 40.0 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1N6281A-E3/54 datasheet, 1N6281A-E3/54 pinout, 1N6281A-E3/54 application, or 1N6281A-E3/54 equivalent, this device is evaluated for robust transient suppression in automotive power supplies, industrial I/O protection, telecom line interfaces, and consumer power adapter input stages where fast response (<1 ns), low clamping ratio, and AEC-Q101-compliant variants are critical selection criteria.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below VWM (23.1 V), enters avalanche breakdown near VBR (25.7–28.4 V), and clamps transients to ≤37.5 V at 40.0 A. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable breakdown characteristics across temperature.
Thermally, it delivers 6.5 W steady-state power dissipation on an infinite heatsink at TL = 75 °C, with RθJA = 75 °C/W and RθJL = 15.4 °C/W. The device supports surge currents up to 200 A (8.3 ms half-sine) and maintains operation from –55 °C to +175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1.0 mA - defines precise avalanche onset threshold for reliable triggering without false trips |
| VWM | 23.1 V - maximum continuous reverse working voltage; ensures no conduction during normal 24 V rail operation |
| VC @ IPPM | 37.5 V at 40.0 A - clamping voltage limits downstream component stress during 1500 W transient events |
| PPPM | 1500 W (10/1000 µs) - enables protection against severe lightning and load-dump surges per ISO 7637-2 |
| IFSM | 200 A (8.3 ms half-sine) - supports single-event surge survival in automotive power inputs |
| TJ range | –55 °C to +175 °C - suitable for under-hood automotive and industrial environments without derating |
| Leakage @ VWM | <1.0 µA - prevents measurable power loss or signal distortion in high-impedance circuits |
Pinout & Package
Package: Axial-leaded DO-201AD (Case Style 1.5KE), epoxy-molded body with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to circuit ground or return path; completes shunt path during transient |
| Cathode | High-side connection point | Connected to protected line (e.g., 24 V rail); color band identifies polarity for correct orientation |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %), low leakage, and long-term reliability under thermal cycling |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation when properly mounted |
| Clamping ratio (VC/VBR) | ~1.39 - low ratio minimizes voltage overshoot on protected ICs and MOSFETs during fast transients |
| Response time | <1 ns - faster than MOVs or GDTs, enabling protection of high-speed digital interfaces and gate drivers |
| AEC-Q101 qualification option | Available as 1N6281AHE3_B variant - validated for automotive powertrain and chassis applications |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 24 V battery-fed ECUs exposed to ISO 7637-2 load dump (up to 120 V, 400 ms) and jump-start transients. IC Role / Device Role: Primary shunt clamp on main power rail upstream of DC/DC converter and LDOs. Use Value: Limits voltage to ≤37.5 V during 40 A surge, preventing damage to 40 V-rated input capacitors and controller ICs. |
Use Scenario: 4–20 mA current loop interface in PLC analog input modules subjected to field wiring ESD and inductive kickback. IC Role / Device Role: Bidirectional-capable unidirectional TVS placed across loop terminals with series current-limiting resistor. Use Value: Clamps transients to safe levels while maintaining sub-1 µA leakage at 24 V loop supply, preserving measurement accuracy. |
| Telecom Line Interface Protection | Consumer Power Adapter Input Stage |
Use Scenario: Ethernet PoE PSE side or DSL line driver ICs facing induced surges from outdoor cabling per ITU-T K.20/K.21. IC Role / Device Role: Secondary-level TVS after gas discharge tube (GDT), providing fast low-voltage clamping. Use Value: Responds in <1 ns to complement slower GDT, reducing let-through energy to <10 mJ at the protected PHY IC. |
Use Scenario: AC-DC adapter primary-side rectifier output protecting switching controller and bulk capacitor. IC Role / Device Role: Unidirectional TVS across DC bus to absorb transformer leakage inductance spikes and rectifier reverse recovery energy. Use Value: Withstands repetitive 1500 W pulses without parameter shift, extending adapter lifetime in high-volume consumer deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | DO-214AA package; lower PPPM (600 W); VBR = 26.7–29.5 V; VC = 38.9 V @ 15.4 A | Better suited for space-constrained PCBs; insufficient for 1500 W surge requirements | Select only if board layout prohibits axial DO-201AD and surge energy is limited to ≤600 W. |
| 1.5KE27A | Same electrical specs and DO-201AD package; differs only in packaging suffix (E3/54 vs. standard bulk/reel) | Functionally identical; same thermal and electrical performance; RoHS-compliant with matte tin leads | Direct form-fit-function replacement; use 1.5KE27A when ordering standard reel packaging instead of tape-and-reel variant. |
Compared with SMBJ24A, 1N6281A-E3/54 delivers 2.5× higher surge power handling and superior thermal robustness in axial mounting; compared with 1.5KE27A, it offers identical protection performance with optimized tape-and-reel delivery (1400 pcs/reel, 13″ diameter) for automated SMT placement compatibility.
Availability
1N6281A-E3/54 is available at Aetrix Electronics and suitable for automotive power systems, industrial I/O modules, telecom line interfaces, and consumer power adapter designs requiring stable component supply with full traceability and lifecycle continuity.
Supply support for 1N6281A-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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, ruggedness, and automotive-grade qualification.
The 1N6281A-E3/54 belongs to Vishay's TRANSZORB® family of high-power TVS diodes, engineered specifically for robust overvoltage protection in harsh environments including automotive, industrial control, and infrastructure equipment.
FAQ
What is the breakdown voltage tolerance for 1N6281A-E3/54?
The 1N6281A-E3/54 has a specified breakdown voltage range of 25.7 V to 28.4 V at 1.0 mA test current, representing a ±5 % tolerance around the nominal 27 V rating. This tight tolerance ensures consistent clamping behavior across production lots and supports predictable system-level surge margin design without over-engineering downstream components.
Is 1N6281A-E3/54 suitable for bidirectional transient protection?
No, 1N6281A-E3/54 is a unidirectional TVS diode and must be oriented with cathode toward the protected line. For bidirectional protection, Vishay offers the 1N6281CA variant (or 1.5KE27CA), which provides symmetrical clamping in both polarities and is required for AC-coupled or floating signal lines such as RS-485 or Ethernet pairs.
What is the maximum allowable lead temperature during soldering for 1N6281A-E3/54?
The 1N6281A-E3/54 supports solder dip at up to 275 °C for 10 seconds maximum, per JESD 22-B106. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability requirements, ensuring reliable wetting and joint integrity during wave or selective soldering processes without compromising junction integrity.
How does the clamping voltage of 1N6281A-E3/54 compare to its breakdown voltage?
The 1N6281A-E3/54 clamps to 37.5 V at its rated 40.0 A peak pulse current, resulting in a clamping ratio (VC/VBR) of approximately 1.39. This low ratio reflects efficient avalanche conduction and minimal incremental surge resistance, directly limiting voltage overshoot on protected MOSFET gates and IC power pins during fast transients.
Does 1N6281A-E3/54 meet automotive qualification standards?
The base 1N6281A-E3/54 is commercial-grade; however, the functionally identical 1N6281AHE3_B variant is AEC-Q101 qualified for automotive applications. Both share identical electrical specs and DO-201AD packaging, but only the HE3_B version undergoes extended stress testing per AEC-Q101 for use in powertrain and chassis systems.
1N6281A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 40A
- 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
1N6281A-E3/54 FAQ
1.How can I place an order for 1N6281A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6281A-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 1N6281A-E3/54 reliable?
The price and inventory of 1N6281A-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 1N6281A-E3/54 is usually 5 days.
3.What payment methods are accepted for 1N6281A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6281A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6281A-E3/54?
1N6281A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6281A-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 1N6281A-E3/54?
For technical support, including 1N6281A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6281A-E3/54 requirements.
6.How does Aetrix verify that 1N6281A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1N6281A-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 1N6281A-E3/54 meets industry standards.
7.What is the process for return or replacement of 1N6281A-E3/54?
All 1N6281A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6281A-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 1N6281A-E3/54 part is unused and in its original packaging.
Return procedure for 1N6281A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6281A-E3/54 Tags
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