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Vishay General Semiconductor - Diodes Division 1.5KE75AHE3/51
- Part No.:
- 1.5KE75AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE75AHE3/51.pdf
- Description:
- TVS DIODE 64.1VWM 104VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,296
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Product details
Overview
1.5KE75AHE3/51 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 71.3 V minimum breakdown voltage (VBR), 64.1 V maximum stand-off voltage (VWM), 104 V clamping voltage (VC) at 14.6 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the 1.5KE75AHE3/51 datasheet, 1.5KE75AHE3/51 pinout, 1.5KE75AHE3/51 application, or 1.5KE75AHE3/51 equivalent, this device serves as a robust, glass-passivated, leaded TVS solution for protecting MOSFETs, ICs, and sensor interfaces against lightning-induced surges, inductive switching transients, and ESD events in industrial and automotive systems.
Technical Context
The 1.5KE75AHE3/51 operates as a uni-directional avalanche diode with fast sub-nanosecond response time (≤1 ns), enabling effective clamping before sensitive downstream components experience damaging overvoltage. Its junction is glass passivated for stable long-term performance and moisture resistance.
It delivers 1500 W peak pulse power handling per 10/1000 µs waveform at TA = 25 °C, derating linearly above 25 °C with RθJA = 75 °C/W and RθJL = 15.4 °C/W. The device supports 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits low incremental surge resistance for tight clamping control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min) | 71.3 V - Ensures reliable conduction onset above normal operating voltage to avoid false triggering |
| VWM | 64.1 V - Maximum continuous reverse working voltage; defines safe DC operating margin below breakdown |
| VC @ IPPM | 104 V - Clamped voltage at 14.6 A peak pulse; determines maximum stress imposed on protected circuitry |
| PPPM | 1500 W - Peak transient energy absorption capacity under standardized 10/1000 µs surge condition |
| IPPM | 14.6 A - Maximum non-repetitive surge current the device safely clamps without degradation |
| TJ max | +175 °C - Enables operation in high-temperature under-hood automotive and industrial environments |
| AEC-Q101 | Qualified - Confirmed reliability for automotive electronics per stress test requirements (HTOL, TC, AC, etc.) |
Pinout & Package
Package: Case Style 1.5KE - Axial-leaded, molded epoxy body (UL 94 V-0 rated), matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to ground or low-impedance return in uni-directional configuration; must be routed with minimal inductance |
| Cathode | Clamping node / Surge current sink | Connected to protected line; color-banded end; carries full transient current during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse power (10/1000 µs) | Provides robust protection against severe transients including ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4 surges |
| Sub-nanosecond response time | Clamps within ≤1 ns to prevent overshoot damage to fast-switching MOSFETs and microcontrollers |
| AEC-Q101 qualified | Validated for automotive use including engine control units, body electronics, and ADAS sensor interfaces |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance and automotive material compliance requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Primary clamping element placed between power rail and ground, absorbing >100 V spikes before they reach MCU or CAN transceiver. Use Value: Limits rail voltage to ≤104 V during 14.6 A surge, preventing latch-up or gate oxide rupture in downstream semiconductors. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Uni-directional TVS placed across sensor output and ground, shunting fast transients before op-amp input stage. Use Value: Sub-ns response ensures clamping occurs before 10–100 ns ESD pulses exceed op-amp absolute maximum ratings. |
| DC Motor Drive Gate Protection | Telecom Line Surge Suppression |
Use Scenario: Safeguarding high-side N-channel MOSFET gates in H-bridge motor drivers against inductive kickback. IC Role / Device Role / Timing Role: TVS connected between gate and source, clamping VGS to safe levels during turn-off. Use Value: 104 V clamping prevents gate oxide breakdown when VDD = 48 V and LDRV × di/dt induces >150 V spikes. |
Use Scenario: Front-end protection of RS-485 transceivers on outdoor telecom links exposed to induced lightning surges. IC Role / Device Role / Timing Role: Discrete TVS on differential bus lines (A/B) referenced to ground, absorbing common-mode surges. Use Value: 1500 W rating enables survival of 1 kV/0.5 A IEC 61000-4-5 combination wave surges without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A | Surface-mount SMB package; lower 600 W PPPM; same VBR range (71.3–78.8 V); higher VC (121 V @ 9.7 A) | Preferred for space-constrained PCBs; unsuitable for high-energy 1500 W surges | Select SMBJ75A only when board area is critical and surge energy remains ≤600 W |
| 1.5KE75CA | Bi-directional variant; identical VBR, VWM, and PPPM; symmetric clamping in both polarities | Required for AC-coupled or bidirectional signal lines (e.g., RS-232, audio); not suitable for DC rail protection | Choose 1.5KE75CA only when protecting balanced or alternating-polarity signals where reverse conduction is needed |
Compared with SMBJ75A and 1.5KE75CA, the 1.5KE75AHE3/51 offers superior 1500 W surge handling in an axial-leaded through-hole package ideal for high-reliability power rail and motor drive applications where mechanical robustness and thermal dissipation via leads are prioritized.
Availability
1.5KE75AHE3/51 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface hardening, and DC motor drive protection requiring stable component supply and AEC-Q101 traceability.
Supply support for 1.5KE75AHE3/51 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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom infrastructure where robust overvoltage protection is mission-critical.
FAQ
What is the clamping voltage of the 1.5KE75AHE3/51 and how does it protect downstream components?
The 1.5KE75AHE3/51 has a maximum clamping voltage (VC) of 104 V at 14.6 A peak pulse current (10/1000 µs). This value defines the upper voltage limit imposed on the protected circuit during a transient event. By limiting voltage excursions to ≤104 V, the 1.5KE75AHE3/51 prevents overvoltage stress beyond the absolute maximum ratings of connected ICs, MOSFETs, or sensors-ensuring system-level robustness against ISO 7637-2 load dump or IEC 61000-4-5 surges.
Is the 1.5KE75AHE3/51 suitable for automotive applications?
Yes, the 1.5KE75AHE3/51 is AEC-Q101 qualified and specifically designed for automotive use. Its construction-including glass-passivated junction, RoHS-compliant HE3 plating (JESD 201 Class 2 whisker resistance), and operation up to +175 °C junction temperature-meets stringent automotive reliability requirements. It is commonly deployed in engine control units, body control modules, and ADAS sensor interfaces for protection against load dump, jump-start, and ESD events.
How does the 1.5KE75AHE3/51 differ from the bi-directional 1.5KE75CA variant?
The 1.5KE75AHE3/51 is uni-directional, with a cathode band indicating polarity and clamping action only in reverse bias-ideal for DC power rail protection. In contrast, the 1.5KE75CA is bi-directional, offering symmetrical clamping in both polarities, making it suitable for AC-coupled or differential signal lines like RS-232 or CAN. They share identical breakdown (71.3–78.8 V) and peak power (1500 W) specs but differ fundamentally in conduction directionality and marking (no band for CA).
What is the thermal resistance profile of the 1.5KE75AHE3/51 and how does it affect PCB layout?
The 1.5KE75AHE3/51 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W and junction-to-ambient (RθJA) of 75 °C/W. Because it is an axial-leaded device, heat is primarily conducted through its leads-not the PCB-so wide copper pours or thermal vias offer minimal benefit. Instead, maintain ≥9.5 mm lead length (per datasheet) and avoid excessive solder mask coverage on leads to maximize natural convection cooling and ensure reliable 6.5 W steady-state power dissipation.
Can the 1.5KE75AHE3/51 be used in parallel to increase surge current handling?
No-parallel connection of discrete TVS diodes like the 1.5KE75AHE3/51 is not recommended due to VBR tolerance mismatch (±5 %), which causes uneven current sharing and potential thermal runaway in one device. For higher surge capability, select a single higher-rated part (e.g., 3.0KE75A) or implement staged protection with upstream current-limiting resistors and downstream low-capacitance TVS arrays. The 1.5KE75AHE3/51 is specified for standalone 1500 W operation only.
1.5KE75AHE3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 64.1V
- Voltage - Breakdown (Min):
- 71.3V
- Voltage - Clamping (Max) @ Ipp:
- 104V
- Current - Peak Pulse (10/1000µs):
- 14.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE75AHE3/51 FAQ
1.How can I place an order for 1.5KE75AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE75AHE3/51 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 1.5KE75AHE3/51 reliable?
The price and inventory of 1.5KE75AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE75AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE75AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE75AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE75AHE3/51?
1.5KE75AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE75AHE3/51 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 1.5KE75AHE3/51?
For technical support, including 1.5KE75AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE75AHE3/51 requirements.
6.How does Aetrix verify that 1.5KE75AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE75AHE3/51 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 1.5KE75AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE75AHE3/51?
All 1.5KE75AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE75AHE3/51, 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 1.5KE75AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE75AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE75AHE3/51 Tags
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