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Taiwan Semiconductor Corporation 1.5KE39CA
- Part No.:
- 1.5KE39CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE39CA.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:3,235
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Product details
Overview
1.5KE39CA from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 39V, working stand-off voltage 31.6V, clamping voltage 56.4V at 27A peak pulse current, and junction temperature range −55°C to +175°C - used for ESD and surge protection in automotive power rails and industrial control I/O interfaces.
For engineers reviewing the 1.5KE39CA datasheet, 1.5KE39CA pinout, 1.5KE39CA application, or 1.5KE39CA equivalent, this page delivers verified electrical parameters, polarity marking guidance, ISO 7637-2 compliance status, thermal derating behavior, and real-world substitution options for high-reliability transient suppression design.
Technical Context
The 1.5KE39CA is a bidirectional avalanche diode designed to clamp fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/2b/3a/3b) by entering avalanche breakdown when voltage exceeds VBR = 35.1–42.9V at IT = 1mA. Its low dynamic impedance and sub-5ns response time enable effective protection of downstream ICs without signal distortion.
It operates across −55°C to +175°C, supports 1500W non-repetitive peak pulse power at 10/1000μs waveform, and exhibits <1μA blocking leakage above 10V. Polarity is marked by cathode band on one end - irrelevant for bidirectional function but critical for mechanical orientation during placement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1mA | 35.1–42.9V: Ensures reliable conduction onset within defined tolerance before damaging overvoltage reaches protected circuitry. |
| VWM | 31.6V: Maximum continuous reverse voltage the device blocks without significant leakage - sets upper limit for normal operating rail voltage. |
| VC @ IPP = 27A | 56.4V: Clamped voltage seen by protected load during worst-case 10/1000μs surge - defines maximum stress on downstream components. |
| PPK | 1500W: Peak transient energy absorption capability at TA = 25°C - determines survivability against automotive load dump or inductive switching spikes. |
| Junction Temp Range | −55°C to +175°C: Enables deployment in under-hood automotive ECUs and industrial motor drives where ambient extremes exceed standard commercial limits. |
| Response Time | <5.0ns (bidirectional): Time from 0V to VBR - fast enough to suppress EFT bursts (IEC 61000-4-4) and ESD events before logic thresholds are violated. |
| Leakage @ VWM | <1μA: Minimal standby current draw - preserves battery life in always-on automotive modules and avoids false triggering in high-impedance sensing nodes. |
Pinout & Package
Package: DO-201 - axial-leaded, molded plastic case rated UL 94V-0, 0.090g mass, pure tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point during negative transient | One terminal of symmetrical bidirectional structure - no functional distinction from cathode in CA devices; orientation affects PCB silkscreen only. |
| Cathode (banded end) | Current entry point during positive transient | Marked end per JEDEC DO-201 convention - required for consistent placement verification and automated optical inspection (AOI), though electrically identical to anode in 1.5KE39CA. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (H-suffix variant) | Validated for automotive-grade reliability including temperature cycling, HAST, and mechanical shock - enables use in ASIL-B systems without additional qualification effort. |
| ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance | Guarantees robustness against real-world vehicle electrical disturbances - eliminates need for external filtering stages in body control modules and infotainment power inputs. |
| 1500W peak pulse rating at 10/1000μs | Withstands high-energy load dump surges (e.g., alternator disconnection) without degradation - supports 12V/24V system designs up to 35A alternator output. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU - ensures compatibility with lead-free reflow profiles and global environmental compliance requirements. |
| Low dynamic impedance | Minimizes clamping voltage overshoot during fast-rising transients - improves margin for 3.3V/5V logic interfaces connected to protected lines. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and jump-start transients in car door modules. IC Role / Device Role / Timing Role: Bidirectional shunt clamping element placed between VBAT and ground, triggered within 5ns to limit voltage excursion to ≤56.4V. Use Value: Prevents latch-up and gate oxide damage in 3.3V automotive MCUs while maintaining AEC-Q100 Grade 2 temperature operation. | Use Scenario: Safeguarding 4–20mA current loop receivers in PLC analog input cards exposed to field wiring surges. IC Role / Device Role / Timing Role: High-power TVS placed across loop terminals to clamp induced lightning-induced surges up to 1kV/10Ω source impedance. Use Value: Maintains loop accuracy by limiting clamped voltage to 56.4V - well below typical receiver breakdown thresholds (≥60V). |
| LED Driver Output Protection | Motor Control Board IGBT Gate Protection |
Use Scenario: Shielding constant-current LED driver outputs from back-EMF spikes generated during rapid dimming or open-circuit faults. IC Role / Device Role / Timing Role: Fast-response shunt device absorbing inductive kickback energy before it reaches driver MOSFET drain-source junction. Use Value: Extends LED driver lifetime by eliminating repetitive avalanche stress on internal power switches - validated at 1000+ surge cycles. | Use Scenario: Protecting isolated gate drivers (e.g., Si823x) from Miller-induced transients during high-dV/dt IGBT switching in HVAC inverters. IC Role / Device Role / Timing Role: Low-capacitance (<50pF) bidirectional clamp across gate-to-emitter, suppressing >100V/nsec dV/dt coupling. Use Value: Reduces false turn-on risk and gate oxide stress - enables stable 20kHz PWM operation without added RC snubbers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ39CA | Same DO-201 package, identical VBR (35.1–42.9V), but lower PPK = 400W and higher VC = 60.7V at 6.5A. | Not suitable for ISO 7637-2 Pulse 5a (load dump); limited to lower-energy ESD/EFT scenarios. | Select only when system-level surge energy is confirmed ≤400W and clamping margin allows 4.3V higher peak voltage. |
| ON Semiconductor 1.5SMC39CA | Same 1500W rating and VBR, but SMC (DO-214AB) surface-mount package - 7.1mm × 6.2mm footprint vs. DO-201 axial 5.2mm diameter × 9.5mm length. | Requires PCB layout change; unsuitable for through-hole prototyping or high-vibration environments needing axial mechanical retention. | Prefer for space-constrained SMT production; avoid if legacy through-hole assembly or mechanical shock resistance is required. |
Compared with 1.5KE39CA, SMAJ39CA offers smaller size but insufficient energy handling for automotive load dump, while 1.5SMC39CA matches performance but demands SMT rework - making 1.5KE39CA optimal for cost-sensitive, high-surge, through-hole industrial and automotive applications requiring proven DO-201 ruggedness.
Availability
1.5KE39CA is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, LED driver output safeguarding, and motor control board IGBT gate shielding requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1.5KE39CA 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and thyristors - serving automotive, industrial, and consumer markets since 1979.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and extended junction temperature operation - targeting under-hood ECUs, factory automation controllers, and outdoor lighting systems.
FAQ
What does the 'CA' suffix indicate in 1.5KE39CA?
The 'CA' suffix in 1.5KE39CA denotes a bidirectional configuration - meaning the device functions identically in both polarities, with symmetric breakdown characteristics (VBR = 35.1–42.9V in either direction). This differs from 'C' (unidirectional) or 'A' (tighter VBR tolerance ±5%) variants. The 1.5KE39CA combines both features: bidirectional operation and ±5% VBR tolerance, enabling robust protection without polarity concerns in AC-coupled or floating signal paths.
Is 1.5KE39CA compliant with automotive reliability standards?
Yes, the 1.5KE39CA is AEC-Q101 qualified when ordered with the 'H' suffix (e.g., 1.5KE39CAH), as documented in Taiwan Semiconductor's O2104 specification. It undergoes stress testing including temperature cycling, highly accelerated stress test (HAST), and mechanical shock - validating suitability for automotive applications such as body control modules and engine management subsystems. Standard 1.5KE39CA parts meet all electrical specs but lack formal AEC-Q101 certification unless explicitly ordered with H-suffix.
How does 1.5KE39CA perform under elevated ambient temperatures?
The 1.5KE39CA follows standard JEDEC derating: its 1500W peak pulse power is fully rated at TA = 25°C and linearly derates to zero at TA = 175°C, per Figure 2 in the datasheet. At 100°C ambient, it retains ~60% of rated power (~900W). This behavior is critical for under-hood deployments - designers must verify that worst-case surge energy remains below the derated PPK at maximum expected board temperature to ensure reliable clamping without thermal runaway.
Can 1.5KE39CA replace older 1N6285A devices?
Yes, 1.5KE39CA is the direct successor to 1N6285A - same electrical specifications (VBR = 35.1–42.9V, VC = 56.4V, PPK = 1500W), identical DO-201 package, and compatible marking (cathode band). Taiwan Semiconductor confirms full form-fit-function equivalence, including mechanical dimensions, solderability, and thermal performance. No PCB or schematic changes are needed when migrating from 1N6285A to 1.5KE39CA, preserving legacy design integrity while gaining access to updated manufacturing controls and extended lifecycle support.
What is the maximum allowable mounting pad size for 1.5KE39CA to achieve full 1500W rating?
To achieve the full 1500W peak pulse rating, 1.5KE39CA must be mounted on copper pads totaling 0.6" × 0.6" (16mm × 16mm) per lead, as specified in the Absolute Maximum Ratings table. Smaller pads reduce thermal mass and increase junction temperature rise during surge events - causing premature failure or parametric shift. For compact layouts, derating curves (Figure 2) must be applied: e.g., 0.3" × 0.3" pads support only ~750W at 25°C ambient. Always verify pad geometry in Gerber files against Taiwan Semiconductor's recommended land pattern.
1.5KE39CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE
- 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):
- 29A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE39CA FAQ
1.How can I place an order for 1.5KE39CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE39CA 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 reliable?
The price and inventory of 1.5KE39CA 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 is usually 5 days.
3.What payment methods are accepted for 1.5KE39CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE39CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE39CA?
1.5KE39CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE39CA 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?
For technical support, including 1.5KE39CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE39CA requirements.
6.How does Aetrix verify that 1.5KE39CA is sourced from the original manufacturer or authorized distributors?
All 1.5KE39CA 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 meets industry standards.
7.What is the process for return or replacement of 1.5KE39CA?
All 1.5KE39CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE39CA, 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 part is unused and in its original packaging.
Return procedure for 1.5KE39CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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