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Vishay General Semiconductor - Diodes Division 1.5KE47AHE3/51
- Part No.:
- 1.5KE47AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE47AHE3/51.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,240
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Product details
Overview
1.5KE47AHE3/51 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 44.7 V minimum breakdown voltage (VBR), 40.2 V maximum stand-off voltage (VWM), 64.8 V clamping voltage (VC) at 23.1 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability - deployed in ECU power input stages and sensor interface protection.
For engineers reviewing the 1.5KE47AHE3/51 datasheet, 1.5KE47AHE3/51 pinout, 1.5KE47AHE3/51 application, or 1.5KE47AHE3/51 equivalent, this page delivers verified electrical parameters, JEDEC-standard 1.5KE package details, clamping behavior under surge conditions, RoHS-compliant and whisker-tested terminal specifications, and validated alternative options for circuit redesign or supply continuity planning.
Technical Context
The 1.5KE47AHE3/51 operates as a silicon avalanche diode with glass-passivated junction, delivering bi-directional clamping capability only when used in symmetrical configurations - though its native polarity is uni-directional, marked by cathode band. It responds within <1 ns to transient events and maintains low incremental surge resistance to ensure precise voltage limiting during 10/1000 µs surges.
Thermal performance is defined by 15.4 °C/W junction-to-lead thermal resistance and 75 °C/W junction-to-ambient resistance, enabling reliable operation up to 175 °C junction temperature. Its 3.5 V forward voltage at 100 A (per spec note for ≤220A devices) supports robust surge conduction without secondary failure modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7 V / 49.4 V - defines guaranteed avalanche initiation range; ensures consistent turn-on across production lots and temperature |
| VWM | 40.2 V - maximum continuous reverse operating voltage; must exceed system nominal DC rail (e.g., 36 V automotive battery) with margin |
| VC @ IPPM | 64.8 V at 23.1 A - clamped voltage seen by protected IC during full-rated 1500 W transient; determines downstream component voltage stress |
| PPPM | 1500 W (10/1000 µs) - peak surge handling capacity; validates suitability for ISO 7637-2 Pulse 1/2/5a and IEC 61000-4-5 Level 4 compliance |
| IFSM | 200 A (8.3 ms half-sine) - non-repetitive forward surge rating; supports protection against load dump transients in 12 V/24 V vehicle systems |
| TJ max | 175 °C - enables placement near high-power components without derating concerns; critical for under-hood automotive modules |
| Qualification | AEC-Q101 qualified (HE3 suffix) - certified for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body meeting UL 94 V-0. Matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards; HE3 suffix denotes JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path during positive transients | Connected to ground or low-impedance return; carries full surge current during clamping |
| Cathode | Avalanche breakdown node during reverse-biased overvoltage | Connected to protected line (e.g., CAN_H, LIN, 12 V rail); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse power (10/1000 µs) | Supports single-event surge suppression without degradation in industrial motor drives and automotive ECUs |
| AEC-Q101 qualification | Validates suitability for automotive applications including powertrain, body control, and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot on protected ICs - critical for 5 V or 3.3 V logic-level components |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under high-temperature/humidity bias, eliminating latent field failures in sealed modules |
Applications
| Automotive Power Input Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V battery feed to engine control unit exposed to load dump (ISO 7637-2 Pulse 5a) and jump-start transients. IC Role / Device Role: Primary clamping device placed between battery rail and DC-DC converter input. Use Value: Limits voltage to ≤64.8 V during 23.1 A surge, preventing damage to downstream LDOs and microcontrollers rated for 65 V absolute maximum. |
Use Scenario: 24 V analog sensor output line (e.g., pressure transducer) routed through noisy factory environments. IC Role / Device Role: Point-of-entry TVS on signal line before instrumentation amplifier input. Use Value: Clamps ESD (IEC 61000-4-2) and fast transients (IEC 61000-4-4) below 65 V, preserving 24 V signal integrity and ADC reference stability. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: -48 V DC power bus in telecom base station shelf subjected to lightning-induced surges on remote feeder lines. IC Role / Device Role: Secondary protection stage after gas discharge tube (GDT), absorbing residual energy. Use Value: Provides sub-1 ns response and 1500 W dissipation to limit let-through voltage to telecom PHY ICs with 70 V abs max ratings. |
Use Scenario: Brushed DC motor driver board in washing machine exposed to back-EMF spikes during commutation. IC Role / Device Role: Freewheeling path clamp across H-bridge MOSFETs to suppress inductive kick. Use Value: Absorbs 200 A surge (8.3 ms) without failure, protecting gate drivers and MCU I/O pins from destructive voltage reversal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45A | Lower PPPM (600 W), smaller SMB package (vs. DO-201AD), VC = 73.5 V @ 8.2 A | Not AEC-Q101 qualified; suited for space-constrained consumer or industrial PCBs where 1500 W is not required | Select when footprint reduction outweighs peak power needs and automotive qualification is unnecessary |
| 1.5KE47CA | Bi-directional variant; same VBR, VWM, VC, and PPPM; no polarity marking | Used where AC-coupled or bidirectional signal lines (e.g., RS-485, CAN) require symmetric clamping | Choose only if circuit lacks defined DC bias polarity - otherwise, 1.5KE47AHE3/51 offers tighter VWM margin for unidirectional rails |
Compared with SMBJ45A and 1.5KE47CA, the 1.5KE47AHE3/51 uniquely combines AEC-Q101 qualification, DO-201AD mechanical robustness for high-vibration environments, and optimal VWM/VBR margin for 36–42 V automotive systems - making it the preferred choice for mission-critical power rail protection where reliability trumps miniaturization.
Availability
1.5KE47AHE3/51 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom line cards, and appliance motor drive circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5KE47AHE3/51 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, and protection devices with emphasis on reliability, power handling, and automotive-grade validation.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications where failure is not an option.
FAQ
What is the clamping voltage of the 1.5KE47AHE3/51 under full-rated surge conditions?
The 1.5KE47AHE3/51 exhibits a maximum clamping voltage (VC) of 64.8 V when subjected to its rated peak pulse current of 23.1 A (10/1000 µs waveform). This value is measured per JEDEC standard test conditions and represents the upper limit of voltage imposed on the protected circuit during worst-case transient events - critical for verifying compatibility with downstream IC absolute maximum ratings.
Is the 1.5KE47AHE3/51 suitable for automotive applications?
Yes, the 1.5KE47AHE3/51 is AEC-Q101 qualified and manufactured with HE3 suffix indicating compliance with JESD 201 Class 2 whisker resistance. Its 175 °C maximum junction temperature, robust DO-201AD package, and validated performance under ISO 7637-2 load dump and pulse tests make it appropriate for under-hood and chassis-mounted automotive modules including body controllers and sensor hubs.
How does the 1.5KE47AHE3/51 differ from the standard 1.5KE47A part?
The 1.5KE47AHE3/51 differs from generic 1.5KE47A by its HE3 suffix: it is RoHS-compliant, AEC-Q101 qualified, and meets JESD 201 Class 2 whisker resistance requirements. The "/51" denotes packaging in 13" paper tape and reel (1400 pcs), while standard 1.5KE47A may lack automotive qualification and use different plating or packaging formats.
What is the standoff voltage (VWM) of the 1.5KE47AHE3/51, and why does it matter?
The 1.5KE47AHE3/51 has a maximum working peak reverse voltage (VWM) of 40.2 V. This parameter defines the highest continuous DC or RMS voltage the device can block without entering avalanche conduction - essential for ensuring no leakage or false triggering on a 36 V automotive rail or 24 V industrial bus, while retaining sufficient margin below VBR for reliable operation.
Can the 1.5KE47AHE3/51 be used in bi-directional protection circuits?
No - the 1.5KE47AHE3/51 is a uni-directional TVS diode, identified by its cathode band marking. For bi-directional protection (e.g., AC lines or differential buses like RS-485), the 1.5KE47CA variant must be used. Attempting to use the 1.5KE47AHE3/51 in reverse-biased AC applications risks catastrophic failure due to lack of symmetrical breakdown characteristics.
1.5KE47AHE3/51 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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 23.1A
- 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
1.5KE47AHE3/51 FAQ
1.How can I place an order for 1.5KE47AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE47AHE3/51 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 1.5KE47AHE3/51 reliable?
The price and inventory of 1.5KE47AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE47AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE47AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE47AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE47AHE3/51?
1.5KE47AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE47AHE3/51 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 1.5KE47AHE3/51?
For technical support, including 1.5KE47AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE47AHE3/51 requirements.
6.How does Aetrix verify that 1.5KE47AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE47AHE3/51 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 1.5KE47AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE47AHE3/51?
All 1.5KE47AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE47AHE3/51, 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 1.5KE47AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE47AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE47AHE3/51 Tags
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