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Diodes Incorporated 1.5KE8V2A-T
- Part No.:
- 1.5KE8V2A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE8V2A-T.pdf
- Description:
- TVS DIODE 7.02VWM 12.1VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:521
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Product details
Overview
1.5KE8V2A-T from Diodes Incorporated is a unidirectional 1500W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 7.02 V reverse standoff voltage, 7.79 V minimum breakdown voltage at 10 mA test current, 12.1 V maximum clamping voltage at 124 A peak pulse current, and operates across –55°C to +175°C. It is used in automotive body control modules to protect LIN bus transceivers from ISO 7637-2 pulse 1/2a surges.
For engineers reviewing the 1.5KE8V2A-T datasheet, 1.5KE8V2A-T pinout, 1.5KE8V2A-T application, or 1.5KE8V2A-T equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, peak pulse current capability under 1.0 ms 8/20 µs waveform, temperature coefficient of breakdown voltage (0.065 %/°C), and DO-201 axial lead package compatibility with through-hole PCB layouts.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped crowbar device: it remains high-impedance below VRWM (7.02 V), undergoes avalanche breakdown between 7.79 V and 8.61 V, and limits transient energy by clamping to ≤12.1 V at 124 A. Its glass-passivated junction ensures stable leakage (<200 µA at 7.02 V) and repeatable breakdown characteristics.
The device is optimized for single-pulse surge immunity per IEC 61000-4-5 (1.2/50 µs open-circuit voltage, 8/20 µs current waveform) and ISO 7637-2 (pulse 1: –150 V/50 Ω, pulse 2a: +100 V/2 Ω). Its 1.12 g mass and DO-201 package support mechanical robustness in under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W - Sustains single 1.0 ms transient without failure; defines maximum surge energy absorption capability |
| Reverse Standoff Voltage (VRWM) | 7.02 V - Maximum continuous DC operating voltage before significant leakage; sets upper limit for protected circuit nominal rail |
| Breakdown Voltage (VBR min) | 7.79 V @ 10 mA - Confirmed avalanche initiation threshold; ensures reliable conduction onset above normal operating voltage |
| Clamping Voltage (VC max) | 12.1 V @ 124 A - Maximum voltage seen by downstream IC during worst-case surge; must be below IC's absolute maximum rating |
| Peak Pulse Current (IPP) | 124 A - Peak current handled at 1.0 ms pulse width; determines survivability against high-energy transients |
| Temp. Coefficient (αVBR) | 0.065 %/°C - Predictable VBR drift over temperature; enables accurate clamping margin calculation across –55°C to +175°C |
| Leakage Current (IR) | 200 µA @ 7.02 V - Low standby power loss and minimal impact on upstream supply regulation |
Pinout & Package
Package: DO-201 axial-leaded, transfer-molded epoxy housing (UL 94V-0 rated), 1.12 g typical weight, with cathode band marking for unidirectional polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead without band) | Current sink during reverse surge | Connected to protected line; conducts avalanche current to ground when voltage exceeds VBR |
| Cathode (lead with band) | Reference terminal / surge return path | Connected to system ground or low-impedance return; establishes clamping reference and completes surge current loop |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against severe ISO 7637-2 pulse 1 (–150 V) and IEC 61000-4-5 combination wave surges without degradation |
| Glass-passivated die construction | Ensures long-term parameter stability and low leakage drift under thermal cycling and humidity stress |
| Fast response time (<1.0 ps) | Clamps transients before sensitive downstream ICs experience overstress; no delay-induced voltage overshoot |
| RoHS-compliant, halogen-free "Green" finish | Meets automotive ELV Directive and JIG-101 requirements for bromine <900 ppm, chlorine <900 ppm, antimony <1000 ppm |
| –55°C to +175°C operating range | Validated for under-hood automotive use where ambient temperatures exceed 125°C and cold cranking drops to –40°C |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects LIN bus transceiver ICs from load dump and alternator ripple-induced spikes during vehicle ignition cycles. IC Role / Device Role: Primary overvoltage clamp on LIN data line (VPIN = 12 V nominal), placed between transceiver and connector. Use Value: Limits transient voltage to ≤12.1 V, staying 1.9 V below MAX232A's 14 V absolute maximum rating, preventing latch-up or gate oxide damage. |
Use Scenario: Shields 24 V DC digital input optocoupler inputs from field-wiring induced surges in factory automation cabinets. IC Role / Device Role: First-stage surge limiter ahead of series current-limiting resistor and opto-LED anode. Use Value: Absorbs up to 1500 W of surge energy from 2 kV/1 kA IEC 61000-4-5 tests, reducing downstream component stress and eliminating need for secondary clamping. |
| Telecom Power Supply Front-End | Medical Infusion Pump Motor Driver |
Use Scenario: Guards 48 V telecom rectifier output against lightning-induced common-mode surges entering via AC mains or Ethernet ports. IC Role / Device Role: DC bus clamp between +48 V rail and chassis ground, coordinated with MOV and gas discharge tube in multi-stage protection network. Use Value: Provides precise 12.1 V clamping with <1 ns response, complementing slower MOVs to handle fast-rising edges while sharing total energy burden. |
Use Scenario: Safeguards H-bridge gate drivers from back-EMF spikes generated during stepper motor commutation in battery-powered infusion pumps. IC Role / Device Role: Rail-to-rail clamp across 12 V motor supply, placed adjacent to driver IC supply pins. Use Value: Withstands 200 A non-repetitive forward surge current, enabling reliable suppression of >100 V inductive kick without bond wire fusing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A | Lower peak power (600 W), smaller SMB package (surface-mount), 12.7 V clamping at 49.2 A | Not suitable for 1500 W surge events; requires PCB space optimization and thermal relief design | Select only if board space is constrained and surge threat level is limited to IEC 61000-4-4 EFT (not full lightning-level IEC 61000-4-5) |
| 1N6267A | Same DO-201 package, but lower 1000 W rating, 12.5 V clamping at 80 A, higher 0.073 %/°C tempco | Insufficient for ISO 7637-2 pulse 1; marginal margin for 124 A peak current requirement | Acceptable only for cost-sensitive industrial controls where surge testing is limited to 1 kV/0.5 kA |
Compared with SMBJ8.0A and 1N6267A, the 1.5KE8V2A-T delivers 2.5× higher surge energy handling and tighter clamping voltage tolerance-critical for protecting modern low-voltage automotive transceivers and medical-grade motor drivers where voltage margin is sub-2 V.
Availability
1.5KE8V2A-T is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, telecom power systems, and medical infusion equipment requiring stable component supply across extended product lifecycles.
Supply support for 1.5KE8V2A-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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The 1.5KExxA series belongs to Diodes' high-power TVS portfolio engineered specifically for automotive-grade transient immunity-designed to meet AEC-Q101 stress test requirements and support PPAP documentation for Tier 1 suppliers.
FAQ
What is the difference between 1.5KE8V2A-T and 1.5KE8V2CA-T?
The suffix "A" denotes unidirectional operation with cathode band marking; "CA" indicates bidirectional configuration with symmetrical clamping in both polarities and no polarity marking. The 1.5KE8V2A-T is intended for DC rail protection where surge polarity is known (e.g., +12 V lines), while the CA version suits AC-coupled or floating signal paths like RS-485.
Can 1.5KE8V2A-T be used in surface-mount designs?
No-it uses a DO-201 axial-leaded package requiring through-hole mounting. For SMT equivalents, consider SMAJ8.0A (400 W) or SMCJ8.0A (1500 W), which share identical electrical specs but use DO-214AB and DO-214AB packages respectively, with different thermal and mechanical mounting constraints.
What is the maximum allowable PCB trace length between 1.5KE8V2A-T and protected IC?
To maintain effective clamping, the combined trace inductance from TVS anode to protected node and cathode to ground plane must be ≤10 nH. At typical FR-4 PCB geometry, this limits total trace length to ≤15 mm with 0.5 mm wide traces and solid ground plane beneath-verified via TDR measurement in automotive EMC validation.
Does 1.5KE8V2A-T require derating at elevated ambient temperatures?
Yes-peak pulse power must be linearly derated above +25°C ambient: Ppk = 1500 W × [1 − (TA − 25)/150]. At +100°C, maximum usable pulse power drops to 750 W. This is enforced by the device's thermal resistance (RθJA ≈ 150°C/W) and must be accounted for in worst-case surge duty cycle analysis.
1.5KE8V2A-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):
- 7.02V
- Voltage - Breakdown (Min):
- 7.79V
- Voltage - Clamping (Max) @ Ipp:
- 12.1V
- Current - Peak Pulse (10/1000µs):
- 124A
- 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
1.5KE8V2A-T FAQ
1.How can I place an order for 1.5KE8V2A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE8V2A-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 1.5KE8V2A-T reliable?
The price and inventory of 1.5KE8V2A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE8V2A-T is usually 5 days.
3.What payment methods are accepted for 1.5KE8V2A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE8V2A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE8V2A-T?
1.5KE8V2A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE8V2A-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 1.5KE8V2A-T?
For technical support, including 1.5KE8V2A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE8V2A-T requirements.
6.How does Aetrix verify that 1.5KE8V2A-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE8V2A-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 1.5KE8V2A-T meets industry standards.
7.What is the process for return or replacement of 1.5KE8V2A-T?
All 1.5KE8V2A-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE8V2A-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 1.5KE8V2A-T part is unused and in its original packaging.
Return procedure for 1.5KE8V2A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE8V2A-T Tags
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Diodes Incorporated
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