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Vishay General Semiconductor - Diodes Division 1.5KE250A-E3/73
- Part No.:
- 1.5KE250A-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE250A-E3/73.pdf
- Description:
- TVS DIODE 214VWM 344VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:240
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Product details
Overview
1.5KE250A-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-side overvoltage protection in power rails and signal lines. It features a 250 V standoff voltage (VWM), 237–263 V breakdown voltage (VBR) at 1 mA, 344 V clamping voltage (VC) at 4.4 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients in industrial and automotive power supplies.
For engineers reviewing the 1.5KE250A-E3/73 datasheet, 1.5KE250A-E3/73 pinout, 1.5KE250A-E3/73 application, or 1.5KE250A-E3/73 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, RoHS-compliant packaging details, and direct alternative part comparisons - all specific to the 1.5KE250A-E3/73 commercial-grade unidirectional TVS diode.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, delivering fast sub-nanosecond response time and low incremental surge resistance. Its unidirectional polarity uses a cathode band marking, and it exhibits a maximum forward voltage of 5.0 V at 100 A, per JEDEC-standard test conditions.
The 1.5KE250A-E3/73 is rated for 175 °C maximum junction temperature and features a thermal resistance of 15.4 °C/W (junction-to-lead) and 75 °C/W (junction-to-ambient). It supports repetitive surge duty cycles up to 0.01 % and complies with JESD 22-B106 solder dip requirements (275 °C, 10 s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 214 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC rail margin. |
| VBR (Breakdown Voltage) | 237–263 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above normal operating voltage. |
| VC (Clamping Voltage) | 344 V at IPPM = 4.4 A - Peak voltage seen by protected circuit during 10/1000 µs transient; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 1500 W - Sustained energy absorption capacity for standardized 10/1000 µs surge; enables robust lightning/ESD protection. |
| IFSM (Surge Current) | 200 A - Single half-sine (8.3 ms) non-repetitive forward surge rating; validates survivability in high-energy fault events. |
| TJ max. | 175 °C - Maximum allowable junction temperature; supports operation in high-ambient industrial environments. |
| RθJL | 15.4 °C/W - Junction-to-lead thermal resistance; informs heatsinking feasibility for sustained power dissipation. |
Pinout & Package
Package: Case Style 1.5KE - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, RoHS compliant (E3 suffix), commercial grade only. Lead length 0.375" (9.5 mm); diameter 0.042" (1.07 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to lower-potential side of protected line; forms cathode-grounded configuration in standard unidirectional TVS placement. |
| Cathode | Current exit point in forward bias; marked with color band | Connected to higher-potential rail or signal line; defines clamping direction and polarity-sensitive placement on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable avalanche characteristics and long-term reliability under repeated surge stress without degradation. |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-earth) when properly implemented with series impedance. |
| Sub-nanosecond response time | Clamps transients before sensitive ICs experience damaging overvoltage - critical for protecting modern low-voltage logic and gate drivers. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving clamping precision and reducing stress on protected devices. |
| JESD 201 Class 1A whisker resistance | Validates lead finish stability under thermal cycling, ensuring solder joint integrity in automotive and industrial reflow profiles. |
Applications
| Industrial Motor Drive DC Bus Protection | Automotive Body Control Module (BCM) Power Input |
|---|---|
Use Scenario: Protects 24 V DC bus from inductive kickback generated by relay coils and solenoid drivers in PLC cabinets and factory automation systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +24 V rail and ground, triggered within <1 ns to clamp spikes up to 1.5 kV. Use Value: Prevents latch-up or permanent damage to buck controllers and CAN transceivers by limiting transient voltage to ≤344 V at 4.4 A. |
Use Scenario: Shields BCM microcontroller power input from load-dump and jump-start surges in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 12 V supply line, activated before internal LDOs or PMICs reach failure thresholds. Use Value: Withstands 200 A single-pulse surge (8.3 ms) and maintains clamping below 344 V, enabling compliance with ISO 7637-2 Pulse 5a. |
| Telecom Remote Radio Unit (RRU) Power Interface | Renewable Energy Inverter DC Link Monitoring Circuit |
Use Scenario: Guards Ethernet-powered remote radio units against induced lightning surges on outdoor 48 V PoE+ power feeds. IC Role / Device Role / Timing Role: Standoff-rated TVS on DC input stage, coordinated with upstream GDT and downstream π-filter for multi-stage protection. Use Value: 214 V VWM allows safe operation across full 48 V ±10 % range while clamping 10/1000 µs transients to 344 V - preserving PHY IC integrity. |
Use Scenario: Protects isolated voltage sense circuitry monitoring 600–1000 V DC link in solar inverters from switching noise and grid fault coupling. IC Role / Device Role / Timing Role: High-VBR unidirectional TVS on differential sense inputs, referenced to local ground to avoid common-mode saturation. Use Value: 237–263 V VBR range ensures no false triggering during normal DC link ripple, while 344 V VC limits transient error in ADC sampling window. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ250A | Same 250 V VWM, but 356 V VC at 4.2 A; slightly higher clamping voltage and 1.5 kW rating in SMA package. | SMA package has lower thermal mass and higher RθJA (110 °C/W), limiting sustained surge repetition vs. 1.5KE's axial lead thermal path. | Select SMAJ250A only if board space constraints prohibit axial-leaded devices and surge duty cycle remains <0.005 %. |
| ON Semiconductor 1.5SMC250A | Identical VWM (214 V), VBR (237–263 V), and VC (344 V); same 1500 W rating but in SMC (DO-214AB) surface-mount package. | SMC footprint requires PCB rework; lacks axial lead's mechanical strain relief and natural heat sinking via leads. | Choose 1.5SMC250A for automated assembly where thermal management is handled externally; retain 1.5KE250A-E3/73 for through-hole reliability and lead-based conduction cooling. |
Compared with SMAJ250A and 1.5SMC250A, the 1.5KE250A-E3/73 offers superior thermal dissipation via axial leads (RθJL = 15.4 °C/W), proven field reliability in high-vibration environments, and direct compatibility with legacy through-hole power supply designs - making it preferred for industrial and transportation applications demanding mechanical robustness and repeatable surge endurance.
Availability
1.5KE250A-E3/73 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom remote radio units, and renewable energy inverter monitoring circuits requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE250A-E3/73 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, MOSFETs, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments, targeting industrial power systems, automotive electronics, and infrastructure equipment where failure tolerance and surge repeatability are critical.
FAQ
What is the clamping voltage of the 1.5KE250A-E3/73 under a 10/1000 µs surge?
The 1.5KE250A-E3/73 clamps to a maximum of 344 V when subjected to its rated peak pulse current of 4.4 A using the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and represents the upper voltage limit imposed on protected circuitry during transient events - a key parameter for validating downstream component voltage ratings against surge stress.
Is the 1.5KE250A-E3/73 suitable for automotive applications?
The 1.5KE250A-E3/73 is commercial grade and not AEC-Q101 qualified; Vishay offers the 1.5KE250AHE3_B variant for automotive use. While the 1.5KE250A-E3/73 meets many electrical requirements for automotive power line protection (e.g., 200 A IFSM, 175 °C TJ max), its lack of AEC-Q101 validation means it should not be deployed in safety-critical or production automotive ECUs without additional qualification testing.
How does the 1.5KE250A-E3/73 differ from bidirectional variants like 1.5KE250CA?
The 1.5KE250A-E3/73 is unidirectional with a cathode band marking and conducts only in reverse breakdown; the 1.5KE250CA does not exist - Vishay restricts bidirectional versions to 1.5KE220CA and below. Therefore, 1.5KE250A-E3/73 is exclusively intended for polarity-defined DC rail protection, unlike lower-voltage CA parts used in AC-coupled or differential signal protection.
What is the forward voltage drop of the 1.5KE250A-E3/73 at high current?
At 100 A forward surge current (8.3 ms half-sine), the 1.5KE250A-E3/73 exhibits a maximum instantaneous forward voltage of 5.0 V, as specified in the Vishay datasheet. This VF value is critical for evaluating conduction losses and thermal stress during fault conditions, especially when used in crowbar or active clamp configurations.
Can the 1.5KE250A-E3/73 be used in parallel for higher surge current handling?
Yes, the 1.5KE250A-E3/73 may be paralleled to increase total peak pulse current capacity, but only with matched VBR units and symmetrical PCB layout (equal trace inductance/resistance per device). Mismatched units risk current hogging; Vishay recommends using a single higher-power device (e.g., 3KP250A) instead unless strict matching and layout controls are enforced.
1.5KE250A-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- 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-E3/73 FAQ
1.How can I place an order for 1.5KE250A-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE250A-E3/73 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-E3/73 reliable?
The price and inventory of 1.5KE250A-E3/73 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-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE250A-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE250A-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE250A-E3/73?
1.5KE250A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE250A-E3/73 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-E3/73?
For technical support, including 1.5KE250A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE250A-E3/73 requirements.
6.How does Aetrix verify that 1.5KE250A-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE250A-E3/73 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-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE250A-E3/73?
All 1.5KE250A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE250A-E3/73, 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-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE250A-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE250A-E3/73 Tags
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