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Diodes Incorporated 1.5KE9V1CA-B
- Part No.:
- 1.5KE9V1CA-B
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9V1CA-B.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:7,633
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Product details
Overview
1.5KE9V1CA-B from Diodes Incorporated is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for overvoltage protection of DC power rails and signal lines. It features a 7.78V reverse standoff voltage, 8.65V minimum breakdown voltage at 1mA, 13.4V maximum clamping voltage at 112A peak pulse current, and operates from –55°C to +175°C. Used in automotive body control modules to protect LIN bus transceivers against ISO 7637-2 pulses.
For engineers reviewing the 1.5KE9V1CA-B datasheet, 1.5KE9V1CA-B pinout, 1.5KE9V1CA-B application, or 1.5KE9V1CA-B equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, peak pulse current handling under IEC 61000-4-5 surge, temperature coefficient of breakdown voltage, and DO-201 axial lead mechanical compatibility with high-vibration mounting.
Technical Context
This bidirectional TVS operates symmetrically across both polarities without polarity dependence, enabling protection of AC-coupled or floating signal paths. Its glass-passivated junction ensures stable leakage and breakdown characteristics over temperature and lifetime, with <50μA reverse leakage at 7.78V and 25°C.
The device uses a single-junction avalanche structure optimized for fast response (<1.0ps), low dynamic impedance, and repeatable clamping performance under 10/1000μs waveform stress. Its 0.068%/°C voltage temperature coefficient enables predictable behavior in under-hood automotive environments where ambient can exceed 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W at 1.0ms, defines maximum single-event surge energy absorption capability |
| Reverse Standoff Voltage | 7.78V, maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage | 8.65V min @ 1mA, guaranteed avalanche initiation threshold for reliable clamping onset |
| Clamping Voltage | 13.4V max @ 112A, limits voltage seen by downstream circuitry during worst-case surge |
| Operating Temperature | –55°C to +175°C, supports placement near powertrain ECUs and under-hood modules |
| Leakage Current | 50μA max @ 7.78V, ensures minimal standby power loss in always-on systems |
| Temp Coefficient | 0.068%/°C, allows accurate clamping voltage prediction across full operating range |
Pinout & Package
DO-201 axial-leaded package with tin-finished leads; moisture sensitivity level 1 per J-STD-020; UL 94V-0 rated epoxy molding compound; 1.12g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during negative transient | One end of symmetrical junction; no cathode marking on bidirectional version |
| Cathode | Current entry point during positive transient | Other end of symmetrical junction; unmarked due to bidirectional function |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Stable leakage and breakdown parameters over 15+ year automotive life cycles |
| Bidirectional configuration | Enables single-device protection of differential or AC-coupled interfaces like CAN FD or LIN |
| 1500W peak pulse rating | Withstands ISO 7637-2 Pulse 5a (50V/100ms) without degradation when properly heatsinked |
| RoHS 3 & "Green" compliant | Contains <900ppm Br, <900ppm Cl, <1000ppm Sb - meets automotive ELV and China RoHS requirements |
Applications
| Automotive LIN Bus Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protects LIN transceiver pins in door module ECUs against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional clamping device placed between LIN line and ground, responding within picoseconds to clamp voltage to ≤13.4V. Use Value: Prevents damage to MAX13051 or TJA1021 transceivers during ISO 16750-2 tests up to 100V/100ms. | Use Scenario: Shields 4–20mA current loop input stages in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Front-end surge limiter on terminal block side, absorbing IEC 61000-4-5 Level 3 (2kV/1.2/50μs) surges. Use Value: Maintains signal integrity below 13.4V clamping while surviving >1000 surge events per IEC 61000-4-5 Annex A. |
| DC Power Rail Protection | USB-C Port ESD/Surge Protection |
Use Scenario: Safeguards 9V auxiliary power rails in telematics control units against battery reversal and jump-start spikes. IC Role / Device Role / Timing Role: Parallel-connected TVS across rail-to-ground, conducting only during overvoltage events above 8.65V. Use Value: Limits rail excursion to 13.4V during 1500W 10/1000μs surge, preserving LDO regulators and microcontrollers. | Use Scenario: Secondary-level protection on USB-C CC and VCONN lines in docking stations exposed to hot-plug surges. IC Role / Device Role / Timing Role: Bidirectional clamp between signal line and chassis ground, activated before internal ESD diodes fail. Use Value: Provides 1500W surge headroom beyond IEC 61000-4-2 ±15kV contact discharge, extending port reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | Lower 600W peak power; SMB package; 9.0V standoff; 14.4V clamping at 41.7A | Not suitable for ISO 7637-2 Pulse 5a; limited to IEC 61000-4-5 Level 2 | Select when board space is constrained and surge threat level is lower (e.g., infotainment USB ports) |
| 1.5SMC9.0CA | Same 1500W rating; SMC package; 9.0V standoff; 14.4V clamping at 104A | Surface-mount only; requires reflow-compatible layout; higher thermal resistance than DO-201 | Choose for automated assembly where axial leads are incompatible with production flow |
Compared with SMBJ9.0CA and 1.5SMC9.0CA, the 1.5KE9V1CA-B delivers superior surge current handling (112A vs. 41.7A/104A) and lower clamping voltage (13.4V vs. 14.4V) in an axial package that simplifies manual repair and high-reliability through-hole mounting.
Availability
1.5KE9V1CA-B is available at Aetrix Electronics and suitable for automotive body electronics, industrial analog I/O modules, and DC power distribution systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1.5KE9V1CA-B 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in IATF 16949-certified facilities.
The 1.5KE series belongs to Diodes' high-power TVS portfolio, engineered specifically for automotive-grade transient suppression in harsh environments including engine compartments and chassis-mounted control units.
FAQ
What does the "CA" suffix indicate in 1.5KE9V1CA-B?
The "CA" suffix denotes a bidirectional TVS configuration, meaning the device provides symmetrical clamping for both positive and negative transients. Unlike unidirectional versions (e.g., 1.5KE9V1A-B), it has no cathode band marking and functions identically regardless of polarity applied across its terminals.
Is 1.5KE9V1CA-B qualified to AEC-Q101?
No - the 1.5KE9V1CA-B is not AEC-Q101 qualified. Diodes states that automotive-qualified parts require specific change control, PPAP capability, and IATF 16949 manufacturing; this part is standard commercial grade. For AEC-Q101-compliant alternatives, contact Diodes directly for designated automotive variants.
Can 1.5KE9V1CA-B be used in place of a unidirectional TVS?
Yes, but only if polarity independence is acceptable and clamping voltage margin permits. Bidirectional devices exhibit slightly higher clamping voltage than their unidirectional counterparts (e.g., 13.4V vs. 12.1V for 1.5KE9V1A-B). Use only where circuit topology does not rely on forward conduction path or DC bias directionality.
What is the maximum allowable PCB trace length between 1.5KE9V1CA-B and protected IC?
For optimal protection, keep trace inductance below 10nH - typically achieved with ≤10mm total path length (device to IC plus return to ground). Longer traces increase clamping voltage overshoot; use ground plane stitching and minimize loop area to preserve sub-13.4V clamping performance during 10/1000μs surges.
1.5KE9V1CA-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 112A
- 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:
- DO-201
1.5KE9V1CA-B FAQ
1.How can I place an order for 1.5KE9V1CA-B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9V1CA-B 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 1.5KE9V1CA-B reliable?
The price and inventory of 1.5KE9V1CA-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9V1CA-B is usually 5 days.
3.What payment methods are accepted for 1.5KE9V1CA-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9V1CA-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9V1CA-B?
1.5KE9V1CA-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9V1CA-B 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 1.5KE9V1CA-B?
For technical support, including 1.5KE9V1CA-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9V1CA-B requirements.
6.How does Aetrix verify that 1.5KE9V1CA-B is sourced from the original manufacturer or authorized distributors?
All 1.5KE9V1CA-B 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 1.5KE9V1CA-B meets industry standards.
7.What is the process for return or replacement of 1.5KE9V1CA-B?
All 1.5KE9V1CA-B units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9V1CA-B, 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 1.5KE9V1CA-B part is unused and in its original packaging.
Return procedure for 1.5KE9V1CA-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9V1CA-B Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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