My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE68A-E3/51
- Part No.:
- 1.5KE68A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE68A-E3/51.pdf
- Description:
- TVS DIODE 58.1VWM 92VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,676
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE68A-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 64.6 V minimum breakdown voltage (VBR), 58.1 V maximum standoff voltage (VWM), 92.0 V clamping voltage (VC) at 16.3 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform - deployed across power supply rails and I/O lines in industrial control systems.
For engineers reviewing the 1.5KE68A-E3/51 datasheet, 1.5KE68A-E3/51 pinout, 1.5KE68A-E3/51 application, or 1.5KE68A-E3/51 equivalent, this part serves as a high-energy, fast-response (≤1 ns) clamping device for surge immunity per IEC 61000-4-5, with RoHS-compliant matte tin-plated leads and UL 94 V-0 molded epoxy packaging suitable for automated SMT assembly and reflow.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to clamp transient voltages above its VBR threshold while maintaining low leakage (<1 µA at VWM). Its glass-passivated junction ensures stable parametric performance and robust surge handling up to 200 A non-repetitive forward surge current (IFSM).
The device exhibits a temperature coefficient of VBR of +0.104 %/°C and thermal resistance of 15.4 °C/W (junction-to-lead), enabling reliable operation up to TJ = 175 °C. It is rated for 6.5 W steady-state power dissipation on an infinite heatsink at TL = 75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at 1.0 mA test current - defines precise clamping onset range under standardized DC conditions |
| VWM | 58.1 V maximum - ensures reliable blocking of normal operating voltage without leakage-induced stress |
| VC @ IPPM | 92.0 V at 16.3 A - limits downstream voltage excursion during 10/1000 µs transients to protect ICs and MOSFETs |
| PPPM | 1500 W - delivers high-energy suppression for lightning-induced surges (IEC 61000-4-5 Level 4) |
| IFSM | 200 A (8.3 ms half-sine) - withstands repetitive inductive switching events without degradation |
| TJ max. | +175 °C - supports operation in under-hood automotive and industrial environments with minimal derating |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 compliant epoxy body |
Pinout & Package
1.5KE68A-E3/51 uses the standard DO-201AD (Case Style 1.5KE) axial-leaded package. The cathode is marked by a color band on the body; polarity must be observed during PCB layout to ensure correct clamping direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to circuit ground or lower-potential rail; forms clamping path when transient exceeds VBR |
| Cathode | Protected line input | Connected to line being protected (e.g., 48 V supply rail); avalanche conduction occurs from cathode to anode |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and telecom infrastructure |
| ≤1 ns response time | Clamps transients before vulnerable CMOS or MOSFET gate oxides experience overstress |
| RoHS-compliant matte tin plating | Enables compatibility with Pb-free reflow profiles and eliminates whisker risk (JESD 201 Class 1A) |
| UL 94 V-0 epoxy molding | Provides flame-retardant mechanical encapsulation for safety-critical power supply designs |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of DC bus inputs against inductive kickback from contactor switching and regenerative braking spikes. IC Role / Device Role / Timing Role: Primary clamping element placed between +48 V rail and chassis ground to limit transient excursions to <92 V. Use Value: Prevents latch-up and gate oxide rupture in IGBT drivers and isolated DC/DC controllers during 1 kV/2 Ω surge events. | Use Scenario: Input-stage surge protection on AC/DC front-end rectifiers exposed to lightning-induced surges on outdoor telecom cabinets. IC Role / Device Role / Timing Role: Unidirectional shunt suppressor mounted across bulk capacitor terminals to absorb 1500 W energy pulses. Use Value: Maintains system uptime by preventing catastrophic failure of PFC controllers and secondary-side synchronous rectifiers. |
| Automotive Body Control Modules | Industrial PLC I/O Cards |
Use Scenario: Load-dump and jump-start transient suppression on 12 V battery-fed microcontroller power rails. IC Role / Device Role / Timing Role: Standoff-rated protector (VWM = 58.1 V) placed upstream of LDO regulators to handle ISO 7637-2 Pulse 5a/b. Use Value: Enables compliance with AEC-Q100 stress testing without requiring additional series impedance or filtering stages. | Use Scenario: Field-side analog input protection against ESD and cable discharge events in factory automation sensors. IC Role / Device Role / Timing Role: Fast-clamping interface protector connected between signal line and local ground plane. Use Value: Limits voltage seen by precision op-amps and ADC front-ends to ≤92 V, preserving measurement integrity and avoiding saturation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | Lower PPPM (600 W), smaller SMB package (surface-mount), VC = 103 V @ 5.8 A | Better suited for space-constrained PCBs with lower surge threat levels (IEC 61000-4-2/4-4) | Select when board area is limited and peak surge energy does not exceed 600 W. |
| 1.5SMC68A | Same PPPM (1500 W), SMC package (surface-mount), VC = 112 V @ 13.4 A, higher thermal resistance | Requires thermal relief pads for sustained power dissipation; no axial-leaded mechanical retention | Choose for automated SMT production where leaded mounting is not required and board-level thermal management is feasible. |
Compared with 1.5KE68A-E3/51, SMBJ64A offers footprint savings but reduced surge margin, while 1.5SMC68A matches peak power rating yet demands more careful thermal design due to its surface-mount thermal path limitations.
Availability
1.5KE68A-E3/51 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and PLC I/O cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5KE68A-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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The 1.5KE series was engineered specifically for high-energy transient suppression in power electronics, emphasizing ruggedness, repeatable clamping, and compliance with international surge immunity standards.
FAQ
What is the breakdown voltage tolerance of the 1.5KE68A-E3/51?
The 1.5KE68A-E3/51 has a specified breakdown voltage range of 64.6 V to 71.4 V at 1.0 mA test current, corresponding to ±5% tolerance around the nominal 68 V rating. This tight VBR window ensures predictable clamping behavior across production lots and temperature extremes, critical for consistent protection in 48 V system designs. The 1.5KE68A-E3/51 maintains this specification per JEDEC standard test conditions.
Is the 1.5KE68A-E3/51 suitable for automotive applications?
The 1.5KE68A-E3/51 is commercial-grade and not AEC-Q101 qualified; however, it meets key automotive transient requirements including ISO 7637-2 Pulse 5a/b load-dump immunity when properly applied with appropriate series impedance. For certified automotive use, Vishay offers the 1.5KE68AHE3_B variant. The 1.5KE68A-E3/51 remains widely deployed in non-safety-critical automotive subsystems such as body control modules where qualification is not mandated.
What is the maximum clamping voltage of the 1.5KE68A-E3/51 under surge conditions?
The 1.5KE68A-E3/51 has a maximum clamping voltage (VC) of 92.0 V at 16.3 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value represents the upper limit of voltage imposed on protected circuitry during worst-case surge events and is validated per JEDEC test methods. Designers must ensure downstream components tolerate ≤92 V transient exposure when using the 1.5KE68A-E3/51.
Does the 1.5KE68A-E3/51 have bidirectional capability?
No, the 1.5KE68A-E3/51 is a unidirectional TVS diode, indicated by the "A" suffix (as opposed to "CA" for bidirectional variants). It conducts only in reverse bias above VBR and blocks forward voltage up to ~3.5 V. For AC-line or differential-signal protection requiring symmetrical clamping, designers must select a CA-suffixed part such as 1.5KE68CA. The 1.5KE68A-E3/51 is intended for DC rail protection with defined polarity.
What is the lead finish and soldering compatibility of the 1.5KE68A-E3/51?
The 1.5KE68A-E3/51 features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, supporting both SnPb and Pb-free reflow soldering processes. It passes JESD 201 Class 1A whisker testing and tolerates solder dip at 275 °C for up to 10 seconds. The E3 suffix confirms RoHS compliance and suitability for modern automated assembly lines without post-solder cleaning.
1.5KE68A-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):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 16.3A
- 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
1.5KE68A-E3/51 FAQ
1.How can I place an order for 1.5KE68A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE68A-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 1.5KE68A-E3/51 reliable?
The price and inventory of 1.5KE68A-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 1.5KE68A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE68A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE68A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE68A-E3/51?
1.5KE68A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE68A-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 1.5KE68A-E3/51?
For technical support, including 1.5KE68A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE68A-E3/51 requirements.
6.How does Aetrix verify that 1.5KE68A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE68A-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 1.5KE68A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE68A-E3/51?
All 1.5KE68A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE68A-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 1.5KE68A-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE68A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE68A-E3/51 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
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 …
