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Vishay General Semiconductor - Diodes Division 1.5KE250A-E3/51
- Part No.:
- 1.5KE250A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE250A-E3/51.pdf
- Description:
- TVS DIODE 214VWM 344VC 1.5KE
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
1.5KE250A-E3/51 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails and signal lines. It features a 237 V to 263 V breakdown voltage (VBR), 214 V maximum standoff voltage (VWM), 344 V clamping voltage (VC) at 4.4 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates across -55 °C to +175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE250A-E3/51 datasheet, 1.5KE250A-E3/51 pinout, 1.5KE250A-E3/51 application, or 1.5KE250A-E3/51 equivalent, this part delivers verified 1500 W surge immunity with sub-nanosecond response, low incremental clamping resistance, and RoHS-compliant matte tin-plated leads suitable for J-STD-002 soldering - critical for industrial power supply input stages and automotive body control modules.
Technical Context
This unidirectional TVS diode uses a glass passivated silicon junction optimized for fast transient suppression. Its clamping behavior is defined by a 10/1000 µs waveform test condition, with thermal resistance of 15.4 °C/W (junction-to-lead) and 75 °C/W (junction-to-ambient), enabling reliable operation under repetitive surge stress up to 0.01% duty cycle.
The device exhibits a forward voltage of 5.0 V at 100 A (per note 3), a temperature coefficient of VBR at +0.110 %/°C, and meets JEDEC standards for surge robustness. It is not AEC-Q101 qualified - only 1.5KE6.8AHE3_B through 1.5KE220AHE3_B variants carry that qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 237 V / 263 V - ensures reliable conduction onset above normal 214 V DC rail, preventing false triggering during line tolerance excursions |
| VWM | 214 V - maximum continuous reverse working voltage; sets upper limit for stable non-conducting operation on 200 V nominal systems |
| VC @ IPPM | 344 V - clamped voltage during 4.4 A 10/1000 µs surge; defines worst-case stress imposed on downstream protected circuitry |
| PPPM | 1500 W - peak pulse power handling capability; supports single-event lightning surge immunity per IEC 61000-4-5 Level 4 (4 kV) |
| IPPM | 4.4 A - peak pulse current corresponding to VC; determines minimum series impedance required to limit energy into the TVS |
| TJ max. | +175 °C - high-temperature junction rating enables use in under-hood automotive environments and enclosed industrial enclosures |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" (9.5 mm) lead length; compatible with through-hole PCB assembly and manual rework |
Pinout & Package
1.5KE250A-E3/51 is housed in a DO-201AD (Case Style 1.5KE) axial-leaded package. The cathode is marked by a color band on the body; polarity must be observed in series connection with DC rails.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to lower-potential side of protected node | Must be tied to ground or return path when protecting positive rail; determines directionality of clamping action |
| Cathode | Current exit point in forward bias; marked by color band; connected to higher-potential side | Connected to the line being protected (e.g., +200 V DC input); conducts surge current to ground during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under humidity and thermal cycling stress |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge immunity testing without derating at TA ≤ 25 °C |
| Sub-nanosecond response time | Clamps transients before sensitive ICs experience damaging overvoltage - critical for protecting gate drivers and ADC front-ends |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, reducing stress on downstream components |
| RoHS-compliant matte tin plating | Ensures solderability per J-STD-002 and eliminates whisker risk (JESD 201 Class 1A) |
Applications
| Industrial Power Input Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 200–240 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed across bulk capacitor input to shunt surge energy before it reaches rectifier and regulator ICs. Use Value: Limits transient voltage to ≤344 V, preventing breakdown of 400 V-rated electrolytic capacitors and 600 V MOSFETs in the front-end stage. |
Use Scenario: 24 V battery-fed BCU subsystem subjected to ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 5a (load dump). IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and system ground to absorb negative-going transients and clamp positive spikes. Use Value: Withstands 1500 W surges while maintaining VC below 350 V, ensuring microcontroller and CAN transceiver survival during vehicle cranking and alternator regulation faults. |
| Telecom Remote Power Feeding | Sensor Signal Line Protection |
Use Scenario: 200 V PoE++-derived remote powering of outdoor base station radios over long copper runs susceptible to induced lightning. IC Role / Device Role / Timing Role: First-stage surge protector on DC feed line entering equipment enclosure, upstream of DC-DC converters. Use Value: Clamps 10/1000 µs surges to 344 V within <1 ns, limiting energy delivered to downstream isolation transformers and reducing need for secondary TVS stages. |
Use Scenario: 24 V analog sensor interface (e.g., pressure transducer) in factory automation, exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector entry point to suppress fast transients before they couple into op-amp input stages. Use Value: Provides 1500 W surge rating without adding significant parasitic capacitance, preserving signal integrity for 10 kHz bandwidth analog signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ250A | DO-214AC (SMA) package; 250 V VWM, 414 V VC @ 3.6 A; 400 W PPPM | Lower power rating and higher clamping voltage; suited for space-constrained PCBs where 1500 W is not required | Select when board area is limited and surge threat level is reduced (e.g., internal signal lines vs. main power input) |
| ON Semiconductor 1.5SMC250A | DO-214AB (SMC) package; identical 250 V VWM, 344 V VC @ 4.4 A, 1500 W PPPM; same electrical specs but different mechanical outline | Surface-mount alternative with comparable surge performance; requires SMT reflow and footprint redesign | Choose for automated assembly and higher vibration resistance; verify thermal pad layout matches SMC thermal dissipation requirements |
Compared with 1.5KE250A-E3/51, SMAJ250A offers smaller size but sacrifices 73% peak power handling and increases clamping stress by 20%, while 1.5SMC250A matches electrical performance exactly but demands SMT process adaptation and alters mechanical mounting - making 1.5KE250A-E3/51 optimal for through-hole, high-energy, serviceable designs.
Availability
1.5KE250A-E3/51 is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, telecom remote power feeding, and sensor signal line protection requiring stable component supply across extended product lifecycles.
Supply support for 1.5KE250A-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, rectifiers, and protection devices with emphasis on reliability, ruggedness, and application-specific validation.
The 1.5KE family was engineered for high-energy transient suppression in harsh environments - targeting industrial motor drives, automotive power distribution, and telecom infrastructure where failure modes demand proven surge endurance and thermal stability.
FAQ
What is the maximum clamping voltage of the 1.5KE250A-E3/51 under standard test conditions?
The 1.5KE250A-E3/51 has a maximum clamping voltage (VC) of 344 V when subjected to its rated peak pulse current of 4.4 A using the 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during a full-power surge event. The 1.5KE250A-E3/51 maintains this clamping performance across its specified operating temperature range.
Is the 1.5KE250A-E3/51 AEC-Q101 qualified?
No, the 1.5KE250A-E3/51 is not AEC-Q101 qualified. Per Vishay documentation, only variants with the HE3 suffix (e.g., 1.5KE220AHE3_B) and rated up to 220 V VBR carry AEC-Q101 qualification. The 1.5KE250A-E3/51 is commercial-grade and intended for industrial, telecom, and general-purpose surge protection where automotive qualification is not mandated.
What does the "-E3/51" suffix indicate in 1.5KE250A-E3/51?
The "-E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting JESD 201 Class 1A whisker resistance. The "/51" specifies packaging: 13-inch diameter paper tape and reel, with 51 units per reel segment - consistent with Vishay's ordering code for 1.5KE series axial devices. This differs from /54 (1400 units/reel) and /C (carrier tape).
Can the 1.5KE250A-E3/51 be used in bidirectional configurations?
No, the 1.5KE250A-E3/51 is strictly unidirectional. Bidirectional versions in the 1.5KE family use the "CA" suffix (e.g., 1.5KE220CA) and are only available up to 220 V VBR. The 1.5KE250A-E3/51 lacks symmetrical breakdown characteristics and must be installed with correct polarity - cathode toward the protected line - to function as intended.
What is the thermal resistance from junction to lead for the 1.5KE250A-E3/51?
The 1.5KE250A-E3/51 has a typical thermal resistance of 15.4 °C/W from junction to lead (RθJL). This parameter is critical for estimating temperature rise under sustained power dissipation and informs heatsinking decisions when the device experiences repetitive surges. It is measured with 0.375" (9.5 mm) lead length, per JEDEC test conditions.
1.5KE250A-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):
- 214V
- Voltage - Breakdown (Min):
- 237V
- Voltage - Clamping (Max) @ Ipp:
- 344V
- Current - Peak Pulse (10/1000µs):
- 4.4A
- 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
1.5KE250A-E3/51 FAQ
1.How can I place an order for 1.5KE250A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE250A-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 1.5KE250A-E3/51 reliable?
The price and inventory of 1.5KE250A-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 1.5KE250A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE250A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE250A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE250A-E3/51?
1.5KE250A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE250A-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 1.5KE250A-E3/51?
For technical support, including 1.5KE250A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE250A-E3/51 requirements.
6.How does Aetrix verify that 1.5KE250A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE250A-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 1.5KE250A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE250A-E3/51?
All 1.5KE250A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE250A-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 1.5KE250A-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE250A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE250A-E3/51 Tags
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