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Vishay General Semiconductor - Diodes Division 1N6277A-E3/51
- Part No.:
- 1N6277A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1N6277A-E3/51.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,135
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Product details
Overview
1N6277A-E3/51 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of sensitive electronics. It features a 17.1 V to 18.9 V breakdown voltage (VBR) at 1.0 mA test current, 15.3 V maximum standoff voltage (VWM), 25.2 V clamping voltage (VC) at 59.5 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used in DC power rail and signal line protection for automotive ECUs and industrial I/O modules.
For engineers reviewing the 1N6277A-E3/51 datasheet, 1N6277A-E3/51 pinout, 1N6277A-E3/51 application, or 1N6277A-E3/51 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, thermal resistance (RθJA = 75 °C/W), polarity marking convention, and direct alternative options for circuit protection redesigns requiring stable clamping performance under lightning-induced transients.
Technical Context
The 1N6277A-E3/51 operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast transient suppression (<1 ns response). Its clamping action begins at VWM = 15.3 V and limits voltage to ≤25.2 V at 59.5 A IPPM, enabling robust protection of 15 V-rated ICs without forward conduction during normal operation.
It adheres to JEDEC case style 1.5KE, uses matte tin-plated leads compliant with J-STD-002, and supports soldering up to 275 °C for 10 s. The device is RoHS-compliant (E3 suffix), commercial-grade, and rated for -55 °C to +175 °C junction temperature range with 0.089 %/°C VBR temperature coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at 1.0 mA - defines precise avalanche initiation threshold for predictable overvoltage triggering |
| VWM | 15.3 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 25.2 V at 59.5 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream 15–24 V logic |
| PPPM | 1500 W - peak surge power handling capability per single 1 ms transient event |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), supporting high-energy fault clearing |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, guiding heatsink requirements for sustained duty |
| TJ max | +175 °C - maximum junction temperature, enabling use in under-hood automotive environments |
Pinout & Package
Package: JEDEC 1.5KE molded epoxy case (DO-201AD), axial-leaded, RoHS-compliant matte tin plating. Cathode indicated by color band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to protected circuit ground or low-side reference; carries full surge current during clamping |
| Cathode | Avalanche voltage reference / clamping node | Marked with band; tied to protected line (e.g., 15 V rail); establishes VWM and VBR thresholds |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity in 2 Ω/12 Ω source impedance configurations |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 15 V logic interfaces |
| Fast response time (<1 ns) | Clamps before induced transients propagate into IC input stages, preventing latch-up or gate oxide damage |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance, ensuring solder joint integrity in automated assembly |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects 12 V supply rail and CAN transceiver I/O lines against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary unidirectional TVS placed between battery feed and LDO input, clamping surges before regulation. Use Value: Limits rail voltage to ≤25.2 V during 100 V/500 ms load dump events, preserving 35 V-rated input capacitors and regulator FETs. | Use Scenario: Shields 24 V digital input optocoupler front-end from field-wiring transients and ESD coupling. IC Role / Device Role / Timing Role: Standoff protector on dry-contact interface; conducts only during >15.3 V overvoltage events. Use Value: Prevents false triggering and optocoupler LED degradation by suppressing 1 kV/500 A surges per IEC 61000-4-5. |
| Telecom Power Supply Front-End | Consumer Appliance Motor Drive Board |
Use Scenario: Guards AC-DC converter DC bus against lightning-induced surges entering via PoE or external ports. IC Role / Device Role / Timing Role: Secondary clamping stage after MOV, absorbing residual energy missed by coarse protection. Use Value: Clamps 1500 W transients within 1 ns, reducing voltage overshoot on 24 V bus to safe levels for PWM controller ICs. | Use Scenario: Safeguards microcontroller GPIOs and H-bridge gate drivers from back-EMF spikes during BLDC motor commutation. IC Role / Device Role / Timing Role: Localized TVS on motor phase traces and MCU power pins, placed <5 mm from sensitive nodes. Use Value: Limits induced spikes to ≤25.2 V, preventing MCU reset or gate driver latch-up during 40 V/100 A inductive kick events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Lower PPPM (600 W), smaller SMB package (3.5 × 4.6 mm), VBR = 20.0–22.1 V, VC = 29.2 V @ 20.5 A | Better suited for space-constrained PCBs with lower surge exposure (IEC 61000-4-2/4-4), not for 10/1000 µs high-energy events | Select when board area is critical and surge threat level is ≤Level 3; verify thermal derating for continuous operation. |
| 1.5KE18A | Same electrical specs and JEDEC 1.5KE package; differs only in packaging format (bulk vs. tape-and-reel E3/51) and RoHS compliance documentation traceability | No functional or layout impact; identical placement, soldering, and protection behavior in circuit | Choose for cost-sensitive production runs where tape-and-reel automation is not required. |
Compared with 1N6277A-E3/51, SMBJ18A trades peak power and thermal robustness for compactness, while 1.5KE18A offers identical protection performance with alternate logistics formatting - making the former ideal for miniaturized designs and the latter a drop-in manufacturing substitute.
Availability
1N6277A-E3/51 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input cards, telecom power supplies, and consumer appliance motor drive boards requiring stable component supply and consistent surge immunity performance across production batches.
Supply support for 1N6277A-E3/51 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1N6277A-E3/51 belongs to Vishay's TRANSZORB® TVS family, engineered for high-energy transient suppression in harsh environments including automotive, industrial, and telecom infrastructure - prioritizing clamping precision, surge endurance, and thermal stability.
FAQ
What is the breakdown voltage range of the 1N6277A-E3/51?
The 1N6277A-E3/51 has a guaranteed breakdown voltage (VBR) range of 17.1 V to 18.9 V at 1.0 mA test current, measured per JEDEC standards. This tight tolerance ensures consistent clamping onset across production lots and supports reliable design margins for 15 V systems. The value is confirmed in Vishay document 88301, Table on page 2.
How does the 1N6277A-E3/51 differ from bidirectional TVS diodes like 1N6277CA?
The 1N6277A-E3/51 is unidirectional and features a cathode band for polarity identification, allowing it to conduct only in reverse avalanche mode - ideal for DC rail protection. In contrast, 1N6277CA is bidirectional with no polarity marking and symmetrical clamping in both directions, suited for AC lines or differential data paths. Their VBR, VC, and PPPM values differ per configuration.
Can the 1N6277A-E3/51 be used in automotive under-hood applications?
Yes, the 1N6277A-E3/51 is rated for junction temperatures up to +175 °C and meets commercial-grade reliability requirements for under-hood use. While not AEC-Q101 qualified (which requires HE3 suffix variants), its thermal resistance (RθJA = 75 °C/W) and glass-passivated junction support stable operation in engine control units and lighting modules where ambient temperatures reach 125 °C.
What is the clamping voltage of the 1N6277A-E3/51 at its rated peak pulse current?
The 1N6277A-E3/51 clamps to a maximum of 25.2 V at its rated peak pulse current (IPPM) of 59.5 A, tested with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring compatibility with 24 V logic families and power management ICs.
Is the 1N6277A-E3/51 RoHS compliant and lead-free?
Yes, the 1N6277A-E3/51 carries the E3 suffix, indicating full RoHS compliance per Directive 2011/65/EU and lead-free matte tin plating on leads. It satisfies JESD 201 Class 1A whisker testing and is compatible with standard Pb-free reflow profiles, making it suitable for modern electronics manufacturing without exemption requests.
1N6277A-E3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- 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
1N6277A-E3/51 FAQ
1.How can I place an order for 1N6277A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6277A-E3/51 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 1N6277A-E3/51 reliable?
The price and inventory of 1N6277A-E3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6277A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1N6277A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6277A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6277A-E3/51?
1N6277A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6277A-E3/51 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 1N6277A-E3/51?
For technical support, including 1N6277A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6277A-E3/51 requirements.
6.How does Aetrix verify that 1N6277A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1N6277A-E3/51 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 1N6277A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1N6277A-E3/51?
All 1N6277A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6277A-E3/51, 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 1N6277A-E3/51 part is unused and in its original packaging.
Return procedure for 1N6277A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6277A-E3/51 Tags
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