My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE39CA/54
- Part No.:
- 1.5KE39CA/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE39CA/54.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,578
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE39CA/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 39 V breakdown voltage (VBR = 37.1–41.0 V at 1.0 mA), 33.3 V maximum standoff voltage (VWM), 53.9 V clamping voltage (VC) at 27.8 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates across –55 °C to +175 °C junction temperature. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the 1.5KE39CA/54 datasheet, 1.5KE39CA/54 pinout, 1.5KE39CA/54 application, or 1.5KE39CA/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 ESD/lightning transient design validation and BOM selection.
Technical Context
This device implements a glass-passivated silicon PN junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its bidirectional structure enables symmetrical clamping in AC-coupled or floating circuits without polarity constraints.
It sustains 1500 W peak pulse power under 10/1000 µs waveform with 0.01% duty cycle, derates linearly above 25 °C ambient per Fig. 2, and exhibits a ±0.100 %/°C temperature coefficient of VBR. Clamping performance is validated up to 27.8 A IPPM with VC ≤ 53.9 V, ensuring predictable overvoltage limiting during lightning-induced surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at 1.0 mA - defines reliable conduction onset under bidirectional transients |
| VWM | 33.3 V - maximum continuous reverse voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 53.9 V at 27.8 A - clamping voltage limiting downstream component stress during 10/1000 µs surge |
| PPPM | 1500 W - peak surge energy absorption capacity for lightning and inductive switching events |
| TJ range | –55 °C to +175 °C - supports operation in under-hood automotive and industrial environments |
| RθJA | 75 °C/W - thermal resistance enabling 6.5 W steady-state dissipation on infinite heatsink at TL = 75 °C |
| Leakage ID | ≤1.0 µA at VWM - ensures minimal standby power loss in always-on circuits |
Pinout & Package
Package: JEDEC-standard Case Style 1.5KE - molded epoxy body, matte tin-plated leads, RoHS-compliant (E3 suffix), UL 94 V-0 rated. Dimensions: 5.6 mm × 5.6 mm × 9.5 mm (L × W × H), lead length 9.5 mm (0.375″).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Surge current path | No polarity marking; symmetric terminals conduct identically in either direction during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| 1500 W peak pulse power (10/1000 µs) | Protects against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation |
| Clamping ratio VC/VBR ≈ 1.45 | Minimizes overvoltage overshoot relative to breakdown threshold for robust IC-level protection |
| AEC-Q101 qualified option (HE3 suffix) | Validated for automotive powertrain and body electronics per stress test requirements |
| Low incremental surge resistance | Reduces voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a) |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V/24 V battery rail in engine control units exposed to load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input rails to clamp surges before DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤53.9 V, preventing damage to 3.3 V/5 V logic and analog front-ends while surviving repetitive 1500 W pulses. |
Use Scenario: 4–20 mA current loop or CAN bus lines in factory automation sensors subject to EFT and lightning coupling. IC Role / Device Role / Timing Role: TVS connected between signal and ground to shunt induced common-mode surges without disrupting DC bias. Use Value: Sub-nanosecond response ensures clamping occurs before sensitive op-amps or transceivers experience overstress, preserving signal integrity. |
| Consumer Power Adapter Input Stage | Telecom AC-DC Front-End Protection |
Use Scenario: Primary-side input of offline SMPS in wall adapters subjected to mains-borne surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: TVS placed across bridge rectifier output to suppress differential-mode transients before bulk capacitor. Use Value: Withstands 27.8 A peak current at 53.9 V clamping, reducing stress on primary FETs and enabling smaller X/Y capacitors. |
Use Scenario: AC input stage of telecom power systems where lightning-induced surges exceed 6 kV. IC Role / Device Role / Timing Role: Bidirectional TVS used in L-N and L/N-G configurations to handle both differential and common-mode threats. Use Value: Symmetric clamping ensures equal protection regardless of surge polarity, eliminating need for dual unidirectional devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Lower PPPM (600 W), smaller SMB package (3.6 mm × 4.5 mm), VC = 53.3 V @ 11.8 A | Better suited for space-constrained PCBs with lower surge exposure (IEC 61000-4-5 Level 2) | Select when board area is limited and peak surge current remains below 12 A. |
| 1.5KE39CAHE3_B | Identical electrical specs; AEC-Q101 qualified, HE3 whisker-tested, same 1.5KE package | Required for automotive production where qualification and long-term reliability under thermal/humidity stress are mandated | Choose for automotive OEM programs needing documented qualification and extended lifecycle support. |
Compared with 1.5KE39CA/54, SMBJ33CA trades surge capacity for compactness, while 1.5KE39CAHE3_B adds automotive qualification without altering clamping or footprint - enabling direct substitution where AEC-Q101 compliance is mandatory.
Availability
1.5KE39CA/54 is available at Aetrix Electronics and suitable for automotive power supply protection, industrial sensor interface protection, and telecom AC-DC front-end surge suppression requiring stable component supply, consistent lot-to-lot performance, and traceable sourcing.
Supply support for 1.5KE39CA/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 designs discrete semiconductors for high-reliability power management, protection, and sensing applications, with global manufacturing and testing infrastructure.
The 1.5KE series targets high-energy transient suppression in automotive, industrial, and telecom systems where robustness against lightning, load dump, and EFT events is critical - delivering standardized 1500 W capability in a proven through-hole package.
FAQ
What is the clamping voltage of the 1.5KE39CA/54 under a 10/1000 µs surge?
The 1.5KE39CA/54 clamps to a maximum of 53.9 V when subjected to its rated peak pulse current of 27.8 A under a 10/1000 µs waveform. This value is measured per JEDEC standards and reflects worst-case voltage seen by downstream components during surge events. The 1.5KE39CA/54 maintains this clamping performance across its full operating temperature range.
Is the 1.5KE39CA/54 bidirectional or unidirectional?
The 1.5KE39CA/54 is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping in both directions, making it suitable for AC-coupled circuits, floating grounds, or applications where surge polarity is unpredictable - unlike unidirectional variants (e.g., 1.5KE39A) that require correct cathode orientation.
Does the 1.5KE39CA/54 meet automotive qualification standards?
The base 1.5KE39CA/54 is commercial-grade; however, the AEC-Q101-qualified variant 1.5KE39CAHE3_B shares identical electrical specs and package. That part undergoes stress testing per AEC-Q101 Rev D, including temperature cycling, humidity bias, and mechanical shock - confirming suitability for automotive powertrain and body electronics where 1.5KE39CA/54 alone is not certified.
What is the standoff voltage rating for the 1.5KE39CA/54?
The 1.5KE39CA/54 has a maximum working standoff voltage (VWM) of 33.3 V, meaning it remains non-conductive with leakage ≤1.0 µA up to this DC or RMS voltage. This allows safe integration into 24 V nominal systems with margin for ripple and transients, while ensuring reliable clamping begins only above 37.1 V (VBR min). The 1.5KE39CA/54 thus avoids false triggering in normal operation.
Can the 1.5KE39CA/54 be used in parallel to increase surge handling?
Yes - multiple 1.5KE39CA/54 devices can be paralleled to increase total peak pulse power capacity, provided layout symmetry, matched trace inductance, and thermal management are implemented. However, derating is required due to minor VBR tolerances (±5.3%), and system-level testing is essential to verify current sharing. For higher reliability, consider higher-rated single devices like 3.0KE39CA instead of parallel 1.5KE39CA/54 units.
1.5KE39CA/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:
- -
- 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/54 FAQ
1.How can I place an order for 1.5KE39CA/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE39CA/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/54 reliable?
The price and inventory of 1.5KE39CA/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/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE39CA/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE39CA/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE39CA/54?
1.5KE39CA/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE39CA/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/54?
For technical support, including 1.5KE39CA/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE39CA/54 requirements.
6.How does Aetrix verify that 1.5KE39CA/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE39CA/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/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE39CA/54?
All 1.5KE39CA/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE39CA/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/54 part is unused and in its original packaging.
Return procedure for 1.5KE39CA/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE39CA/54 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 …
