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Vishay General Semiconductor - Diodes Division 1.5KA7.5HE3/73
- Part No.:
- 1.5KA7.5HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA7.5HE3/73.pdf
- Description:
- TVS DIODE 6.05VWM 11.7VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:2,513
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Product details
Overview
1.5KA7.5HE3/73 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode designed for primary overvoltage protection in power rails and signal lines. It features a 7.5 V nominal breakdown voltage (VBR = 6.75–8.25 V), 1500 W peak pulse power (10/1000 µs), 128 V clamping voltage at 128 A peak pulse current, and AEC-Q101 qualification for under-hood automotive electronics.
For engineers reviewing the 1.5KA7.5HE3/73 datasheet, 1.5KA7.5HE3/73 pinout, 1.5KA7.5HE3/73 application, or 1.5KA7.5HE3/73 equivalent, key selection criteria include clamping performance under 10/1000 µs transients, high-temperature operation up to +185 °C junction, RoHS-compliant HE3 packaging with JESD201 Class 2 whisker resistance, and compatibility with inductive load switching surge environments.
Technical Context
The 1.5KA7.5HE3/73 employs Vishay's patented PAR® construction for stable avalanche behavior and low incremental surge resistance. Its unidirectional polarity enables DC-biased rail protection with fast response time (<1 ns) and minimal capacitance (typ. 1000 pF at VWM = 6.05 V).
Rated for 200 A non-repetitive forward surge (8.3 ms half-sine), it operates across –65 °C to +185 °C and maintains clamping integrity under thermal derating per Fig. 2 - critical for engine control units and powertrain modules exposed to high ambient temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 6.75–8.25 V at 10 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| Clamping Voltage VC | 128 V at 128 A (10/1000 µs) - limits downstream voltage stress during ESD or load-dump events |
| Peak Pulse Power PPPM | 1500 W - sustains high-energy transients without failure in automotive 12 V systems |
| Stand-off Voltage VWM | 6.05 V - ensures no conduction during normal 5.5–6.0 V rail operation |
| Junction Temperature Range | –65 °C to +185 °C - supports placement near heat sources in AEC-Q101-compliant modules |
| Surge Current IFSM | 200 A (8.3 ms half-sine) - handles repetitive inductive turn-off spikes in motor drivers |
| Leakage Current ID | 500 µA max at VWM, 150 °C - maintains low standby power loss in always-on circuits |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body (UL 94 V-0), matte tin-plated leads, 0.375" (9.5 mm) lead length, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side return path in unidirectional TVS configuration |
| Cathode | Avalanche conduction terminal | Connected to protected line (e.g., battery rail or sensor supply); color band identifies this end |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Ensures uniform current distribution and stable VBR tolerance across temperature and life cycle |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive under-hood use with extended temperature cycling and mechanical shock compliance |
| 1500 W peak pulse rating (10/1000 µs) | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b and ISO 16750-2 load-dump surges without degradation |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., relay coil flyback) |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in high-reliability solder joints over 15+ year service life |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protection of 5 V microcontroller supply rail against alternator load-dump transients (ISO 16750-2) and relay-induced spikes. IC Role / Device Role / Timing Role: Primary clamping device on main VCC rail, placed upstream of LDO regulators. Use Value: Clamps to 128 V within nanoseconds, limiting energy delivered to downstream ICs while surviving repeated 1500 W pulses. |
Use Scenario: Safeguarding 24 V digital input optocoupler interfaces from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Front-end transient suppressor on dry-contact input lines before signal conditioning circuitry. Use Value: Withstands 200 A surge current (8.3 ms) and maintains <500 µA leakage at elevated temperatures common in enclosed PLC enclosures. |
| Automotive Body Control Module (BCM) | Telecom Power Supply Interface |
Use Scenario: Overvoltage protection for LIN bus transceivers and door-lock actuator drivers exposed to battery reverse-connection and jump-start events. IC Role / Device Role / Timing Role: Unidirectional TVS on 12 V switched power feed to LIN nodes. Use Value: AEC-Q101 qualification ensures reliability across –40 °C to +125 °C ambient, with VBR stability maintained up to +185 °C junction. |
Use Scenario: Secondary surge suppression on -48 V telecom power feeds entering base station equipment cabinets. IC Role / Device Role / Timing Role: Back-to-back clamping element in conjunction with upstream GDTs for multi-stage protection. Use Value: 128 V clamping voltage provides margin below typical -48 V system absolute maximum ratings while enabling compact PCB layout due to TO-277 outline. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5AHE3/52 | Lower PPPM (600 W), smaller SMB package, tighter VBR tolerance (±5 % vs ±10 %) | Better suited for space-constrained consumer electronics; insufficient for automotive load-dump duty cycles | Select when board area is limited and surge energy does not exceed 600 W |
| 1.5KE7.5CT | Bi-directional, higher VC (12.9 V), axial-leaded DO-15 package, no AEC-Q101 qualification | Applicable only in AC-coupled or bidirectional signal line protection; lacks automotive reliability validation | Choose only for non-automotive, cost-sensitive industrial designs requiring bidirectional clamping |
Compared with SMBJ7.5AHE3/52 and 1.5KE7.5CT, the 1.5KA7.5HE3/73 delivers 2.5× higher pulse power, AEC-Q101 assurance, and optimized thermal dissipation in the 1.5KA case - making it the sole choice for under-hood automotive power rail protection where sustained surge robustness and long-term reliability are mandatory.
Availability
1.5KA7.5HE3/73 is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and telecom power interface modules requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1.5KA7.5HE3/73 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 demanding industrial and automotive applications.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in harsh-temperature automotive power systems, emphasizing thermal stability, surge endurance, and process-controlled avalanche consistency.
FAQ
What is the exact breakdown voltage range for the 1.5KA7.5HE3/73?
The 1.5KA7.5HE3/73 has a guaranteed breakdown voltage range of 6.75 V to 8.25 V at 10 mA test current, measured per ANSI/IEEE C62.35. This ±10 % tolerance ensures predictable clamping onset across production lots and temperature extremes, directly supporting design margin calculations for 5 V and 12 V rail protection.
Is the 1.5KA7.5HE3/73 unidirectional or bidirectional?
The 1.5KA7.5HE3/73 is strictly unidirectional, as confirmed in the "FEATURES" section of Vishay document 88300. Its cathode is marked with a color band, and it is intended for DC-biased applications such as battery rail or regulated supply line protection - not AC or differential signal paths.
Does the 1.5KA7.5HE3/73 meet AEC-Q101 requirements?
Yes - the HE3 suffix explicitly denotes AEC-Q101 qualification, verified per note (1) on page 3 of document 88300. The 1.5KA7.5HE3/73 undergoes stress testing including temperature cycling, high-temperature operating life, and mechanical shock to ensure reliability in automotive under-hood environments.
What is the clamping voltage of the 1.5KA7.5HE3/73 at its rated peak pulse current?
At 128 A peak pulse current (10/1000 µs waveform), the 1.5KA7.5HE3/73 clamps to a maximum of 128 V. This value is specified in the "ELECTRICAL CHARACTERISTICS" table and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Can the 1.5KA7.5HE3/73 be used in place of the 1.5KA7.5AHE3/73?
No - the 1.5KA7.5HE3/73 and 1.5KA7.5AHE3/73 are distinct variants: the former has VBR = 6.75–8.25 V and VWM = 6.05 V, while the latter has tighter VBR = 7.13–7.88 V and VWM = 6.40 V. Substitution requires verification of stand-off margin and clamping headroom in the target application.
1.5KA7.5HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.05V
- Voltage - Breakdown (Min):
- 6.75V
- Voltage - Clamping (Max) @ Ipp:
- 11.7V
- Current - Peak Pulse (10/1000µs):
- 128A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KA
1.5KA7.5HE3/73 FAQ
1.How can I place an order for 1.5KA7.5HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA7.5HE3/73 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 1.5KA7.5HE3/73 reliable?
The price and inventory of 1.5KA7.5HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA7.5HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KA7.5HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA7.5HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA7.5HE3/73?
1.5KA7.5HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA7.5HE3/73 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 1.5KA7.5HE3/73?
For technical support, including 1.5KA7.5HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA7.5HE3/73 requirements.
6.How does Aetrix verify that 1.5KA7.5HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KA7.5HE3/73 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 1.5KA7.5HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KA7.5HE3/73?
All 1.5KA7.5HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA7.5HE3/73, 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 1.5KA7.5HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KA7.5HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA7.5HE3/73 Tags
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