My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE39CAHE3_A/C
- Part No.:
- 1.5KE39CAHE3_A/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE39CAHE3_A/C.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,346
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE39CAHE3_A/C 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 1.0 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 is used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the 1.5KE39CAHE3_A/C datasheet, 1.5KE39CAHE3_A/C pinout, 1.5KE39CAHE3_A/C application, or 1.5KE39CAHE3_A/C equivalent, this page delivers verified electrical parameters, JEDEC-standard 1.5KE package details, bidirectional clamping behavior, AEC-Q101 qualification status, and direct alternatives with documented parameter differences - all specific to the exact 1.5KE39CAHE3_A/C variant.
Technical Context
This device implements a glass-passivated silicon PN junction optimized for fast transient suppression. Its bidirectional structure enables symmetrical clamping in both polarities without polarity marking, supporting AC-coupled or floating-line protection schemes. The 10/1000 µs waveform rating reflects standardized surge immunity testing per R.E.A. and IEC 61000-4-5.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15.4 °C/W, enabling reliable operation under pulsed stress up to 27.8 A peak current. It meets JESD 201 Class 2 whisker resistance and UL 94 V-0 flammability requirements, confirming suitability for high-reliability board-level ESD and lightning surge protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at 1.0 mA - defines precise voltage threshold where clamping initiates in either direction |
| VWM | 33.3 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 53.9 V at 27.8 A - actual clamped voltage during 1500 W surge, critical for downstream component voltage margin |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform, duty cycle ≤ 0.01 % |
| IPPM | 27.8 A - maximum non-repetitive surge current supported without degradation |
| TJ range | –55 °C to +175 °C - extended thermal envelope enabling use in under-hood automotive and industrial environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with matte tin-plated leads. Dimensions: 5.3 mm diameter × 9.5 mm length; lead spacing 7.2 mm; weight 0.968 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Reversible terminals | No polarity marking; identical clamping behavior in both directions - simplifies layout for AC or floating lines |
| Lead 1 | Current path terminal | Connected directly to silicon die; requires minimum 9.5 mm lead length for thermal derating compliance |
| Lead 2 | Current path terminal | Electrically symmetric to Lead 1; no functional distinction - interchangeable in circuit placement |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance (±5 %) and low leakage (<1 µA at VWM) over lifetime and temperature |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) without failure when properly mounted |
| Sub-nanosecond response time | Clamps transients within 1 ns - faster than MOVs or polymer-based protectors, preserving signal integrity |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation prevents fire propagation in fault conditions per safety-critical designs |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input rails to clamp transients before DC-DC converters and microcontrollers. Use Value: Withstands 1500 W surges while limiting clamped voltage to 53.9 V - ensuring downstream 60 V-rated MOSFETs remain within safe operating area. |
Use Scenario: Shielding 4–20 mA current-loop sensors in factory automation from induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Placed differential-mode across signal pair to suppress common-mode transients without affecting loop accuracy. Use Value: Symmetrical 33.3 V stand-off and 53.9 V clamping preserve analog signal fidelity while meeting IEC 61000-4-4 Level 4 immunity requirements. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Front-end protection for DSL/POE line cards exposed to telecom-grade lightning surges (10/700 µs). IC Role / Device Role / Timing Role: First-stage shunt protector before gas discharge tube (GDT) and series impedance. Use Value: Fast 1 ns response captures initial surge edge; 1500 W rating allows coordination with slower GDTs for staged protection architecture. |
Use Scenario: Secondary-side overvoltage clamp in universal-input AC/DC adapters for smart home devices. IC Role / Device Role / Timing Role: Bidirectional clamp across output capacitor to absorb flyback spikes from transformer leakage inductance. Use Value: 37.1–41.0 V VBR aligns precisely with 36 V nominal output, preventing false triggering while ensuring shutdown before 54 V OVP threshold. |
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 (3.6 mm × 2.5 mm), VBR = 40–44.2 V | Not AEC-Q101 qualified; suited for space-constrained consumer PCBs, not under-hood automotive | Select when board area is limited and surge requirement is ≤ 600 W; verify thermal pad layout for SMB footprint. |
| 1.5KE39CAHE3_B | Same electrical specs and AEC-Q101 qualification; differs only in revision code (B vs. A/C) and tape/reel packaging (C code = 1400 pcs/reel) | Identical functional performance; B revision includes updated internal process controls per Vishay doc 88301 rev 09-Aug-2022 | Choose for new designs requiring latest manufacturing revision; A/C and B are electrically and mechanically interchangeable. |
Compared with 1.5KE39CAHE3_A/C, SMBJ36CA offers compact size but sacrifices 60 % peak power and automotive qualification, while 1.5KE39CAHE3_B provides identical protection performance with updated process traceability - making it a drop-in replacement for lifecycle continuity without design change.
Availability
1.5KE39CAHE3_A/C is available at Aetrix Electronics and suitable for automotive power systems, industrial sensor interfaces, telecom line cards, and consumer power adapter designs requiring stable component supply, AEC-Q101 compliance, and 1500 W surge resilience.
Supply support for 1.5KE39CAHE3_A/C 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 1.5KE family was engineered specifically for high-energy transient suppression in harsh environments, emphasizing ruggedness, repeatable clamping, and long-term stability under thermal and electrical stress.
FAQ
What is the exact breakdown voltage range for 1.5KE39CAHE3_A/C?
The 1.5KE39CAHE3_A/C has a guaranteed breakdown voltage range of 37.1 V to 41.0 V at a test current of 1.0 mA, measured per JEDEC standard. This specification applies identically in both directions due to its bidirectional construction, and is confirmed in Vishay document 88301, Table on page 2. The 1.5KE39CAHE3_A/C maintains this tolerance across its full operating temperature range.
Is 1.5KE39CAHE3_A/C qualified for automotive applications?
Yes, 1.5KE39CAHE3_A/C is AEC-Q101 qualified per Vishay documentation (note 2 on page 3 of doc 88301). It has passed stress tests including high-temperature reverse bias, temperature cycling, and ESD, making it suitable for automotive powertrain, body control, and ADAS subsystems. The HE3 suffix explicitly denotes AEC-Q101 qualification and RoHS compliance.
How does the clamping voltage of 1.5KE39CAHE3_A/C compare to its breakdown voltage?
The 1.5KE39CAHE3_A/C clamps at 53.9 V when subjected to its rated peak pulse current of 27.8 A (10/1000 µs waveform). This represents a 38 % overvoltage above the upper VBR limit (41.0 V), which is typical for 1500 W TVS devices. This clamping voltage must be below the absolute maximum rating of protected components - for example, ensuring it stays under the 60 V drain-source rating of common automotive MOSFETs.
What is the thermal resistance of 1.5KE39CAHE3_A/C, and how does it affect layout?
The 1.5KE39CAHE3_A/C has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W and junction-to-ambient (RθJA) of 75 °C/W. To maintain reliability during repetitive surges, PCB layout must provide ≥ 9.5 mm lead length and avoid excessive copper pour near leads - per Figure 5 in doc 88301. Shorter leads increase thermal stress and reduce surge endurance.
Can 1.5KE39CAHE3_A/C replace unidirectional TVS diodes in existing designs?
No - 1.5KE39CAHE3_A/C is strictly bidirectional and lacks cathode marking; it cannot substitute for unidirectional parts like 1.5KE39A without circuit review. Unidirectional devices conduct forward current and block reverse voltage asymmetrically, whereas 1.5KE39CAHE3_A/C clamps equally in both polarities. Using it in place of a unidirectional TVS may cause unintended conduction in DC-biased rails.
1.5KE39CAHE3_A/C 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE39CAHE3_A/C FAQ
1.How can I place an order for 1.5KE39CAHE3_A/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE39CAHE3_A/C 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 1.5KE39CAHE3_A/C reliable?
The price and inventory of 1.5KE39CAHE3_A/C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE39CAHE3_A/C is usually 5 days.
3.What payment methods are accepted for 1.5KE39CAHE3_A/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE39CAHE3_A/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE39CAHE3_A/C?
1.5KE39CAHE3_A/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE39CAHE3_A/C 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 1.5KE39CAHE3_A/C?
For technical support, including 1.5KE39CAHE3_A/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE39CAHE3_A/C requirements.
6.How does Aetrix verify that 1.5KE39CAHE3_A/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE39CAHE3_A/C 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 1.5KE39CAHE3_A/C meets industry standards.
7.What is the process for return or replacement of 1.5KE39CAHE3_A/C?
All 1.5KE39CAHE3_A/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE39CAHE3_A/C, 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 1.5KE39CAHE3_A/C part is unused and in its original packaging.
Return procedure for 1.5KE39CAHE3_A/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE39CAHE3_A/C 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 …
