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Vishay General Semiconductor - Diodes Division 1.5KE39CA-E3/54
- Part No.:
- 1.5KE39CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE39CA-E3/54.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,088
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Product details
Overview
1.5KE39CA-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 39 V breakdown voltage (VBR = 37.1–41.0 V at 1 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 53.9 V at 27.8 A, and operates across –55 °C to +175 °C junction temperature. It protects MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges.
For engineers reviewing the 1.5KE39CA-E3/54 datasheet, 1.5KE39CA-E3/54 pinout, 1.5KE39CA-E3/54 application, or 1.5KE39CA-E3/54 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, JEDEC 1.5KE package dimensions, thermal resistance (RθJA = 75 °C/W), and AEC-Q101-qualified alternatives - all critical for automotive ECU, industrial I/O, and telecom surge design validation.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for sub-nanosecond response (<1 ns) and low incremental surge resistance. Its bidirectional architecture enables symmetrical clamping in AC-coupled or floating signal paths without polarity constraints.
It complies with UL 497B recognition (QVGQ2) and meets JESD 22-B106 solderability (275 °C, 10 s). The device sustains 200 A unidirectional forward surge (8.3 ms half-sine) and exhibits a temperature coefficient of VBR = +0.100 %/°C - enabling stable clamping across wide ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at 1 mA - defines precise clamping onset threshold for bidirectional surge events |
| VWM | 33.3 V - maximum continuous working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 53.9 V at 27.8 A - actual clamped voltage during 1500 W transient, limiting downstream stress |
| PPPM | 1500 W (10/1000 µs waveform) - peak surge energy absorption capacity per transient |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, critical for PCB copper pour sizing |
| TJ range | –55 °C to +175 °C - supports under-hood automotive and industrial environments |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - axial-leaded, RoHS-compliant molded epoxy body |
Pinout & Package
1.5KE39CA-E3/54 is housed in a DO-201AD (Case Style 1.5KE) axial package with no polarity marking - consistent with its bidirectional function. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bidirectional terminal pair | Identical clamping behavior in both directions; no cathode band - installed without orientation constraint |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5 %) and long-term reliability under repeated surge stress |
| 1500 W peak pulse power | Handles high-energy transients from 4 kV EFT or 10/700 µs telecom surges without degradation |
| Sub-nanosecond response time | Clamps within 1 ns - faster than MOVs or GDTs - preserving signal integrity in high-speed interfaces |
| UL 497B recognized (QVGQ2) | Validated for telecom and industrial surge protection systems requiring safety agency approval |
| AEC-Q101 qualified option available | HE3 suffix variants meet automotive-grade reliability for engine control and ADAS power rails |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump spikes (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across power input prior to DC/DC converter. Use Value: Limits rail voltage to ≤53.9 V during 1500 W surges, preventing damage to 36 V-rated regulators and microcontrollers. | Use Scenario: Shielding 4–20 mA current-loop sensors in factory automation from ground-bounce and ESD coupling. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on analog input terminals, operating in parallel with signal conditioning circuitry. Use Value: Clamps induced transients before they reach op-amp inputs, maintaining <1 µA leakage at 33.3 V working voltage. |
| Telecom Line Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding DSL/POE line drivers against lightning-induced surges on outdoor copper pairs (IEC 61000-4-5). IC Role / Device Role / Timing Role: Primary-level TVS mounted at connector entry point, upstream of isolation transformers. Use Value: Absorbs 10/1000 µs surges up to 27.8 A while maintaining symmetrical clamping - essential for balanced differential signaling. | Use Scenario: Overvoltage suppression on AC-DC adapter primary side after bridge rectifier, before bulk capacitor. IC Role / Device Role / Timing Role: Secondary surge clamp complementing MOV-based front-end protection. Use Value: Provides precise 39 V clamping with tighter tolerance than MOVs, reducing stress on electrolytic capacitors and switch-mode controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | Lower PPPM (600 W), smaller SMB package (3.5 mm × 4.5 mm), VC = 58.1 V @ 10.3 A | Targeted at space-constrained PCBs where 1500 W rating is not required | Select when board area is limited and surge threat level is moderate (e.g., USB-C PD adapters) |
| 1.5KE39CAHE3_B | Identical electrical specs; AEC-Q101 qualified, HE3 whisker-tested leads, revision-coded "B" | Required for automotive production programs needing PPAP documentation and extended reliability validation | Choose for Tier-1 automotive designs where qualification traceability and long-term supply continuity are mandatory |
Compared with 1.5KE39CA-E3/54, SMBJ36CA trades peak power and axial-mount ruggedness for compactness, while 1.5KE39CAHE3_B adds automotive qualification without altering clamping performance - enabling direct substitution only where AEC-Q101 compliance is contractually required.
Availability
1.5KE39CA-E3/54 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom line surge suppression requiring stable component supply, full traceability, and RoHS-compliant sourcing.
Supply support for 1.5KE39CA-E3/54 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 industry-standard qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - delivering consistent 1500 W surge capability, UL recognition, and broad temperature operation for mission-critical power and signal line protection.
FAQ
What is the breakdown voltage tolerance for 1.5KE39CA-E3/54?
The 1.5KE39CA-E3/54 has a specified breakdown voltage range of 37.1 V to 41.0 V at 1 mA test current, representing a ±5 % tolerance around the nominal 39 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, directly supporting compliance with IEC 61000-4-5 surge immunity requirements. The device's temperature coefficient of +0.100 %/°C further stabilizes performance in automotive and industrial thermal profiles.
Is 1.5KE39CA-E3/54 suitable for automotive applications?
Yes - the 1.5KE39CA-E3/54 is RoHS-compliant and manufactured to commercial-grade specifications. For automotive use, Vishay offers the functionally identical 1.5KE39CAHE3_B variant, which is AEC-Q101 qualified and meets JESD 201 Class 2 whisker testing. While 1.5KE39CA-E3/54 itself is not AEC-Q101 certified, its thermal rating (TJ = –55 °C to +175 °C), UL 497B recognition, and robust 1500 W surge capability make it suitable for non-safety-critical automotive subsystems when validated per customer requirements.
How does the bidirectional nature of 1.5KE39CA-E3/54 affect its installation?
The 1.5KE39CA-E3/54 has no polarity marking - its bidirectional construction means it functions identically regardless of orientation in-circuit. This eliminates assembly errors and simplifies placement on AC-coupled lines, transformer secondaries, or floating data buses. Unlike unidirectional TVS diodes (e.g., 1.5KE39A), the CA suffix indicates symmetrical clamping in both directions, making it ideal for protecting differential pairs, RS-485 transceivers, and telecom line interfaces where voltage reversal occurs.
What is the maximum clamping voltage of 1.5KE39CA-E3/54 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE39CA-E3/54 is 53.9 V at a peak pulse current (IPPM) of 27.8 A, measured using the standard 10/1000 µs waveform. This value represents the worst-case voltage seen downstream during a full 1500 W transient event. Designers use this parameter to verify that protected ICs and passives remain below their absolute maximum ratings - for example, ensuring a 60 V-rated DC/DC controller stays within safe operating limits during surge events.
Does 1.5KE39CA-E3/54 require heatsinking in typical applications?
No - the 1.5KE39CA-E3/54 is rated for 6.5 W steady-state power dissipation on an infinite heatsink at TL = 75 °C, but its primary function is transient suppression, not continuous power handling. Under normal operation, leakage current remains below 1 µA at 33.3 V, generating negligible heat. Heatsinking is unnecessary unless subjected to repetitive high-duty-cycle surges - a condition outside its intended use case. PCB layout should prioritize short, low-inductance traces to the protected node rather than thermal mass.
1.5KE39CA-E3/54 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 27.8A
- 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
1.5KE39CA-E3/54 FAQ
1.How can I place an order for 1.5KE39CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE39CA-E3/54 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 1.5KE39CA-E3/54 reliable?
The price and inventory of 1.5KE39CA-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE39CA-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE39CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE39CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE39CA-E3/54?
1.5KE39CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE39CA-E3/54 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 1.5KE39CA-E3/54?
For technical support, including 1.5KE39CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE39CA-E3/54 requirements.
6.How does Aetrix verify that 1.5KE39CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE39CA-E3/54 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 1.5KE39CA-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE39CA-E3/54?
All 1.5KE39CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE39CA-E3/54, 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 1.5KE39CA-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE39CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE39CA-E3/54 Tags
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