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Vishay General Semiconductor - Diodes Division 1.5KE15A/54
- Part No.:
- 1.5KE15A/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE15A/54.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,693
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Product details
Overview
1.5KE15A from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in power rails and signal lines. It features a 14.3 V minimum breakdown voltage, 15.8 V maximum breakdown voltage at 1.0 mA test current, 12.8 V standoff voltage, 1.0 µA max reverse leakage at standoff, and clamps transients to 21.2 V at 70.8 A peak pulse current under 10/1000 µs waveform - used to safeguard MOSFETs and ICs in industrial power supplies.
For engineers reviewing the 1.5KE15A datasheet, 1.5KE15A pinout, 1.5KE15A application, or 1.5KE15A equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping performance data, thermal resistance (RθJA = 75 °C/W), and AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
The 1.5KE15A operates as a unidirectional silicon avalanche diode with glass-passivated junction, optimized for fast transient suppression (response time < 1 ns). Its 1500 W peak pulse power rating applies to 10/1000 µs waveform at 0.01% duty cycle, and it exhibits low incremental surge resistance to minimize voltage overshoot during ESD or lightning-induced surges.
Thermal performance is defined by RθJL = 15.4 °C/W (junction-to-lead) and derating above 25 °C per Fig. 2; maximum junction temperature is 175 °C. The device uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, with UL 94 V-0 molded epoxy case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min / max | 14.3 V / 15.8 V at IT = 1.0 mA - defines reliable avalanche initiation threshold for overvoltage detection |
| VWM | 12.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC at IPPM | 21.2 V at 70.8 A (10/1000 µs) - clamping voltage limiting stress on downstream components |
| PPPM | 1500 W - peak transient energy absorption capacity without failure |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, critical for PCB copper pour sizing |
| TJ max | 175 °C - maximum allowable junction temperature under sustained surge conditions |
| IFSM | 200 A (8.3 ms half-sine) - surge current handling for unidirectional forward conduction events |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial-lead, molded epoxy body with cathode band marking. Dimensions: 5.3 mm diameter × 9.5 mm length (0.210" × 0.375"), UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or lower-potential rail in unidirectional clamp configuration |
| Cathode (banded end) | Avalanche breakdown terminal | Connected to protected line (e.g., +12 V rail); reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable avalanche characteristics and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 Level 4 surges in industrial power inputs |
| Clamping ratio VC/VBR ≈ 1.37 | Low overvoltage margin enables tighter protection margins for 15 V logic and power circuits |
| Response time < 1 ns | Prevents damage to fast-switching MOSFETs and microcontrollers before transient propagation |
| AEC-Q101 qualified option (1.5KE15AHE3_B) | Validated for automotive under-hood applications including engine control and body electronics |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 12 V DC input rails in programmable logic controllers against inductive switching spikes from solenoids and relays. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp transients before they reach DC-DC converters and microcontrollers. Use Value: Limits voltage excursion to ≤21.2 V during 70.8 A surges, preventing latch-up or gate oxide rupture in downstream 16 V-rated MOSFETs. | Use Scenario: Safeguarding LIN bus transceivers and LED drivers in door module assemblies exposed to load dump and jump-start events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on battery-supplied VBAT line, coordinated with secondary TVS and fuse for layered protection. Use Value: Withstands 200 A 8.3 ms surge (IFSM) and clamps to 21.2 V, preserving signal integrity of 5 V tolerant LIN PHYs during ISO 7637-2 Pulse 5a. |
| Consumer Appliance Motor Drive | Telecom Power Interface |
Use Scenario: Suppressing back-EMF from brushed DC motors in smart HVAC blowers and washing machine pumps. IC Role / Device Role / Timing Role: Mounted across motor terminals to absorb inductive kickback, reducing radiated emissions and protecting H-bridge FETs. Use Value: 1500 W pulse rating handles repetitive 10/1000 µs transients from commutation arcs; glass passivation ensures stability after 105 cycles. | Use Scenario: Front-end protection on -48 V telecom rectifier outputs feeding distributed power modules. IC Role / Device Role / Timing Role: Unidirectional TVS referenced to system ground, absorbing lightning-induced surges on DC distribution buses. Use Value: Clamps 10/1000 µs surges to 21.2 V while maintaining <1.0 µA leakage at 12.8 V, minimizing standby power loss in always-on systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A | DO-214AA package (smaller footprint), 1500 W rating, VBR = 16.7–18.5 V, VC = 24.4 V at 61.5 A | Higher clamping voltage and lower peak current capability; suited for space-constrained PCBs with less stringent voltage margin | Select SMBJ15A when board area is limited and 24.4 V clamping is acceptable for protected 20 V logic rails |
| 1.5SMC15A | SMA package (surface-mount), same VBR/VC specs as 1.5KE15A but lower RθJA (100 °C/W), no axial-leaded mechanical mounting | Requires rework of assembly process and thermal pad layout; not drop-in for through-hole designs | Choose 1.5SMC15A only for new SMT-only designs where automated placement and reduced height are mandatory |
Compared with 1.5KE15A, SMBJ15A trades higher clamping voltage for smaller size, while 1.5SMC15A replaces axial leads with surface-mount compatibility at the cost of thermal performance - neither is pin-compatible, and both require layout revision for direct replacement.
Availability
1.5KE15A is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, consumer appliance motor drives, and telecom power interfaces requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE15A 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 and high-power handling.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting industrial automation, automotive subsystems, and telecom infrastructure where robustness against lightning, ESD, and inductive switching is non-negotiable.
FAQ
What is the breakdown voltage tolerance of the 1.5KE15A?
The 1.5KE15A has a specified breakdown voltage range of 14.3 V to 15.8 V at 1.0 mA test current (VBR min/max), corresponding to ±5% tolerance around the nominal 15 V rating. This tight distribution ensures consistent clamping behavior across production lots and supports predictable circuit protection margins in 12 V and 15 V systems.
Does the 1.5KE15A meet automotive qualification standards?
Yes - the 1.5KE15AHE3_B variant is explicitly AEC-Q101 qualified per Vishay documentation (Document 88301, Note 2), covering temperature cycling, humidity testing, and surge endurance. Standard 1.5KE15A-E3 is commercial grade only; automotive use requires ordering the HE3_B suffix version with full qualification evidence.
How does the 1.5KE15A compare to bidirectional TVS diodes like 1.5KE15CA?
The 1.5KE15A is unidirectional and intended for DC line protection with polarity-sensitive placement (cathode to protected line), whereas 1.5KE15CA is bidirectional and suitable for AC or differential signal lines. They share identical VBR, VC, and PPPM, but 1.5KE15CA lacks cathode marking and supports symmetrical clamping in both directions - not interchangeable without circuit redesign.
What is the maximum reverse leakage current for the 1.5KE15A at its standoff voltage?
At VWM = 12.8 V and TA = 25 °C, the 1.5KE15A exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage minimizes standby power loss in battery-powered or energy-efficient systems and ensures minimal loading on high-impedance sensor or reference circuits.
Can the 1.5KE15A be used in parallel to increase surge current handling?
Yes - Vishay's application notes confirm that multiple 1.5KE15A devices can be paralleled to distribute surge current, provided matched VBR (within 5%) and symmetric PCB layout (equal trace inductance/resistance). However, derating by 20% per device is recommended due to minor parameter variation, and thermal coupling must be managed to avoid localized overheating.
1.5KE15A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 70.8A
- 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
1.5KE15A/54 FAQ
1.How can I place an order for 1.5KE15A/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE15A/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 1.5KE15A/54 reliable?
The price and inventory of 1.5KE15A/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE15A/54 is usually 5 days.
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Once your 1.5KE15A/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 1.5KE15A/54?
For technical support, including 1.5KE15A/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE15A/54 requirements.
6.How does Aetrix verify that 1.5KE15A/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE15A/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 1.5KE15A/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE15A/54?
All 1.5KE15A/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE15A/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 1.5KE15A/54 part is unused and in its original packaging.
Return procedure for 1.5KE15A/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE15A/54 Tags
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