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Diodes Incorporated 1.5KE9V1A-T
- Part No.:
- 1.5KE9V1A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9V1A-T.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:2,647
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Product details
Overview
1.5KE9V1A-T from Diodes Incorporated is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 axial package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 7.78 V reverse standoff voltage, 8.65 V minimum breakdown voltage at 1 mA, 13.4 V maximum clamping voltage at 112 A peak pulse current, and operates across –55°C to +175°C.
For engineers reviewing the 1.5KE9V1A-T datasheet, 1.5KE9V1A-T pinout, 1.5KE9V1A-T application, or 1.5KE9V1A-T equivalent, this part delivers verified clamping performance for automotive body electronics, industrial power supplies, and telecom interface protection where fast response (<1 ns), low leakage (<50 µA @ 7.78 V), and high surge robustness are required.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve stable breakdown characteristics and low capacitance. Its 1.0 mA test current ensures precise VBR validation under standard conditions, while the 13.4 V clamping voltage at 112 A defines its protective threshold during 1.0 ms 8/20 µs surge events.
The device exhibits a voltage temperature coefficient of +0.068 %/°C, enabling predictable VBR drift over temperature. Its DO-201 package supports axial lead mounting with 9.5 mm lead length, rated for 5.0 W steady-state dissipation at TL = 75°C and 200 A non-repetitive forward surge capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W - Sustains single 1.0 ms transients per IEC 61000-4-5 without failure |
| Reverse Standoff Voltage (VRWM) | 7.78 V - Maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 8.65 V min @ 1.0 mA - Confirmed avalanche onset point for reliable triggering |
| Clamping Voltage (VC) | 13.4 V max @ 112 A - Upper limit of protected line voltage during full-rated surge |
| Peak Pulse Current (IPP) | 112 A - Maximum surge current handled at VC = 13.4 V under 1.0 ms pulse |
| Leakage Current (IR) | 50 µA max @ 7.78 V - Ensures minimal standby power loss in always-on circuits |
| Operating Temperature | –55°C to +175°C - Validated operation across automotive under-hood and industrial ambient extremes |
Pinout & Package
Package: DO-201 axial leaded package with transfer-molded epoxy body (UL 94V-0), tin-plated leads, and cathode band marking for polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during reverse-biased clamping | Connected to protected line; conducts when voltage exceeds VBR |
| Cathode | Current exit terminal during clamping; marked with band | Typically tied to ground or lower-potential rail to shunt surge energy |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Enhances long-term reliability and moisture resistance in harsh environments |
| 1500 W peak pulse rating | Meets IEC 61000-4-5 Level 4 (4 kV line-to-line, 2 kV line-to-ground) requirements |
| Fast response time (<1 ns) | Clamps transients before downstream ICs experience damaging overvoltage |
| RoHS-compliant, halogen-free | Complies with EU Directive 2015/863/EU and automotive green material standards |
| –55°C to +175°C operating range | Validated for under-hood automotive, industrial motor drives, and outdoor telecom |
Applications
| Automotive Body Control Module (BCM) | Industrial 24 V DC Power Supply Input |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and inductive switching spikes. IC Role / Device Role: Primary clamping element on 12 V supply rail and signal lines. Use Value: Limits transient excursions to ≤13.4 V, preventing latch-up or gate oxide damage in 5 V/3.3 V logic interfaces. |
Use Scenario: Safeguarding rectified 24 V DC input stage against surges from relay coil de-energization or field wiring faults. IC Role / Device Role: Front-end overvoltage clamp before bulk capacitor and regulator IC. Use Value: Absorbs up to 112 A surge current without degradation, maintaining system uptime in factory automation equipment. |
| Telecom Line Interface Card | Smart Meter Power Input Stage |
|
Use Scenario: Shielding RS-485 transceivers and isolation barrier inputs from lightning-induced surges on outdoor copper pairs. IC Role / Device Role: First-stage protection before gas discharge tube (GDT) and series impedance. Use Value: Fast <1 ns response initiates clamping before GDT fires, reducing let-through energy by >60% versus GDT-only designs. |
Use Scenario: Securing AC/DC converter input against utility grid transients and neutral-ground potential shifts. IC Role / Device Role: Secondary surge suppressor after MOV, handling residual fast-rising edges. Use Value: Low 50 µA leakage preserves meter battery life during extended mains-off periods in AMI deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | 600 W rating, SMA package, 14.4 V clamping at 41.7 A | Lower surge capacity; suited for space-constrained PCBs with moderate threat levels | Select when board area is limited and peak surge current remains below 42 A |
| 1.5SMC9.0A | Surface-mount SMC package, same 1500 W rating, 14.4 V clamping at 104 A | No axial leads; requires reflow-compatible layout and lacks through-hole mechanical retention | Choose for automated assembly and higher-density layouts where axial mounting is impractical |
Compared with SMBJ9.0A and 1.5SMC9.0A, the 1.5KE9V1A-T provides superior surge current handling (112 A vs. 41.7 A / 104 A) and axial mechanical stability, making it preferred for high-reliability industrial and automotive harness-connected nodes.
Availability
1.5KE9V1A-T is available at Aetrix Electronics and suitable for automotive body electronics, industrial 24 V power systems, and telecom line interface protection requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE9V1A-T 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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with design and manufacturing facilities certified to IATF 16949 and ISO 9001 standards.
The 1.5KE series belongs to Diodes' high-power TVS portfolio, engineered specifically for robust front-end surge protection in automotive, industrial, and infrastructure applications demanding AEC-Q200 alignment and extended temperature operation.
FAQ
Is 1.5KE9V1A-T RoHS and halogen-free compliant?
Yes. The 1.5KE9V1A-T meets EU RoHS directives 2011/65/EU and 2015/863/EU, with lead-free finish and halogen/antimony content below 900 ppm bromine, 900 ppm chlorine, and 1000 ppm antimony-certified as a "Green" device per Diodes' specifications.
What is the difference between 1.5KE9V1A-T and 1.5KE9V1CA-T?
The "A" suffix denotes unidirectional operation with cathode band marking; "CA" indicates bidirectional configuration with no polarity marking. The 1.5KE9V1A-T clamps only in reverse bias, while the CA version protects both polarities-critical for AC-coupled or floating signal lines.
Can 1.5KE9V1A-T replace 1N6267A in existing designs?
No. The 1N6267A has a 9.1 V standoff and 14.4 V clamping at 104 A, differing in VRWM, VC, and IPP. Substitution requires verification of clamping margin, thermal derating, and PCB footprint compatibility-DO-201 dimensions match, but electrical behavior is not identical.
Does this TVS diode require a heatsink for 5.0 W steady-state dissipation?
No. The 5.0 W rating applies only at TL = 75°C with 9.5 mm lead length; in typical PCB-mounted configurations, thermal resistance to ambient exceeds limits for continuous 5 W operation. It is rated for transient dissipation-not steady-state-so heatsinking is unnecessary for normal use.
1.5KE9V1A-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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
1.5KE9V1A-T FAQ
1.How can I place an order for 1.5KE9V1A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9V1A-T 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 1.5KE9V1A-T reliable?
The price and inventory of 1.5KE9V1A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9V1A-T is usually 5 days.
3.What payment methods are accepted for 1.5KE9V1A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9V1A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9V1A-T?
1.5KE9V1A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9V1A-T 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 1.5KE9V1A-T?
For technical support, including 1.5KE9V1A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9V1A-T requirements.
6.How does Aetrix verify that 1.5KE9V1A-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE9V1A-T 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 1.5KE9V1A-T meets industry standards.
7.What is the process for return or replacement of 1.5KE9V1A-T?
All 1.5KE9V1A-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9V1A-T, 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 1.5KE9V1A-T part is unused and in its original packaging.
Return procedure for 1.5KE9V1A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9V1A-T 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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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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