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Vishay General Semiconductor - Diodes Division 1.5KE47A-E3/51
- Part No.:
- 1.5KE47A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE47A-E3/51.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,521
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Product details
Overview
1.5KE47A-E3/51 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 47 V breakdown voltage (VBR = 44.7–49.4 V at 1 mA), 40.2 V maximum stand-off voltage (VWM), 64.8 V clamping voltage (VC) at 23.1 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE47A-E3/51 datasheet, 1.5KE47A-E3/51 pinout, 1.5KE47A-E3/51 application, or 1.5KE47A-E3/51 equivalent, this device delivers verified clamping performance, glass-passivated junction reliability, RoHS-compliant matte tin leads, and JEDEC-standard 1.5KE package compatibility - critical for automotive body electronics, industrial PLC I/O protection, and telecom line interface designs requiring AEC-Q101-qualified alternatives.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1 µA leakage at 40.2 V), then avalanches rapidly (<1 ns response) when transient voltage exceeds VBR, diverting surge current away from downstream components. Its 1500 W peak pulse power rating is validated per 10/1000 µs waveform with 0.01% duty cycle, and thermal performance is characterized by RθJA = 75 °C/W and RθJL = 15.4 °C/W.
The device uses a glass-passivated silicon junction for stable avalanche characteristics and low incremental surge resistance. Polarity is marked by a cathode band; it supports soldering per J-STD-002 and JESD 22-B102, with 275 °C/10 s max solder dip tolerance and JESD 201 Class 1A whisker resistance (E3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7 V / 49.4 V at 1 mA - defines precise avalanche initiation threshold for repeatable clamping onset |
| VWM | 40.2 V - maximum continuous reverse operating voltage without significant leakage |
| VC @ IPPM | 64.8 V at 23.1 A - clamped voltage during 1500 W transient, limiting stress on protected ICs |
| PPPM | 1500 W - peak surge power handling with 10/1000 µs waveform, enabling robust lightning/ESD protection |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), supporting high-energy fault events |
| TJ range | −55 °C to +175 °C - wide junction temperature operation for under-hood automotive and industrial environments |
| Package | DO-201AD (Case Style 1.5KE) - industry-standard axial leaded package with 0.375" lead length, UL 94 V-0 molding |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), molded epoxy body with matte tin-plated axial leads; cathode identified by color band. Dimensions: 1.0" × 1.0" body min., 0.375" (9.5 mm) lead length, 0.042" (1.07 mm) lead diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side of protected circuit; carries surge current during reverse-biased clamping |
| Cathode (banded end) | Avalanche junction terminal | Connected to higher-potential rail (e.g., VCC); determines polarity and clamping reference point |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, low-drift avalanche characteristics and long-term reliability under repeated surge stress |
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity in DC power input stages without derating |
| <1 ns response time | Clamps transients before sensitive logic or analog circuits experience damaging overvoltage |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance and 275 °C/10 s solder dip requirements for high-reliability assembly |
| UL 94 V-0 molding | Provides flame-retardant encapsulation essential for safety-critical industrial and automotive applications |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protects microcontroller GPIOs and CAN transceiver power rails from load-dump and jump-start transients in 12 V vehicle systems. IC Role / Device Role: Shunt clamping element placed between VBAT and ground, triggered only during overvoltage events >40.2 V. Use Value: Limits voltage seen by downstream LDOs and MCU pins to ≤64.8 V, preventing latch-up or gate oxide rupture in 3.3 V/5 V logic. | Use Scenario: Shields 4–20 mA current loop receiver circuitry from field-wiring induced surges in factory automation cabinets. IC Role / Device Role: Primary overvoltage clamp on loop supply rail, coordinated with series current-limiting resistor and secondary TVS. Use Value: Absorbs up to 1500 W of energy from 10/1000 µs transients while maintaining <1 µA leakage at 24 V nominal, preserving measurement accuracy. |
| Telecom DSL Line Interface | Consumer Appliance Motor Drive Power Stage |
Use Scenario: Guards ADSL/VDSL line driver ICs against lightning-induced surges entering via outdoor copper pairs. IC Role / Device Role: First-stage protection device on line-side transformer secondary, referenced to isolated ground. Use Value: Clamps common-mode surges to ≤64.8 V within 1 ns, preventing damage to differential line drivers rated for ±15 V absolute max. | Use Scenario: Safeguards N-channel MOSFET half-bridge gate drivers and bootstrap capacitors from inductive kickback during BLDC motor commutation. IC Role / Device Role: Rail-to-rail clamp on 12 V/15 V gate drive supply, placed adjacent to driver IC decoupling capacitor. Use Value: Suppresses >100 V spikes generated by motor winding inductance, ensuring gate driver remains within safe SOA and avoids false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45A | Lower PPPM (600 W), smaller SMB package (vs. DO-201AD), 45 V VWM, 70 V VC @ 8.6 A | Preferred for space-constrained PCBs where 600 W surge margin suffices; not suitable for 1500 W IEC 61000-4-5 Level 4 compliance | Select SMBJ45A only if board area is critical and surge threat level is limited to IEC 61000-4-5 Level 2–3. |
| 1.5KE47CA | Bidirectional variant (symmetrical clamping), same VBR/VC/PPPM, no polarity marking | Required for AC-coupled or floating signal lines (e.g., RS-485, Ethernet PHY) where voltage reversals occur | Choose 1.5KE47CA instead of 1.5KE47A-E3/51 only when protecting bidirectional data paths or transformer-coupled interfaces. |
Compared with SMBJ45A and 1.5KE47CA, the 1.5KE47A-E3/51 provides higher surge robustness in a through-hole package ideal for high-power industrial inputs, while offering unidirectional precision for DC rail protection - making it optimal for cost-sensitive, high-energy applications where board real estate is less constrained than in portable electronics.
Availability
1.5KE47A-E3/51 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and telecom line interface designs requiring stable component supply, long-lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for 1.5KE47A-E3/51 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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and AEC-Q101 qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications where 1500 W surge capability and wide temperature operation are mandatory.
FAQ
What is the clamping voltage of the 1.5KE47A-E3/51 under maximum surge conditions?
The 1.5KE47A-E3/51 has a maximum clamping voltage (VC) of 64.8 V at 23.1 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per JEDEC standards and represents the upper limit of voltage imposed on protected circuitry during a full 1500 W transient event. Engineers must ensure downstream components have sufficient voltage margin above 64.8 V to avoid damage.
Is the 1.5KE47A-E3/51 suitable for automotive applications?
Yes, the 1.5KE47A-E3/51 is widely deployed in automotive body electronics, though it is commercial-grade (not AEC-Q101 qualified). For AEC-Q101 compliance, Vishay offers the 1.5KE47AHE3_B variant. The 1.5KE47A-E3/51 maintains full electrical specifications across −55 °C to +175 °C and meets solderability and whisker resistance requirements per JESD 201 Class 1A, supporting under-hood use with appropriate thermal design.
How does the 1.5KE47A-E3/51 differ from the bidirectional 1.5KE47CA?
The 1.5KE47A-E3/51 is unidirectional with cathode marking and blocks forward current above ~3.5 V, while the 1.5KE47CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. Their VBR, VC, and PPPM ratings are identical, but the 1.5KE47A-E3/51 is intended for DC rail protection (e.g., VCC-to-ground), whereas 1.5KE47CA suits AC or floating signal lines like RS-485 or Ethernet transformers.
What is the maximum leakage current of the 1.5KE47A-E3/51 at its working voltage?
At its maximum stand-off voltage of 40.2 V (VWM), the 1.5KE47A-E3/51 exhibits ≤1.0 µA reverse leakage current at 25 °C, per the Vishay 88301 datasheet. This ultra-low leakage preserves power efficiency in always-on systems and avoids loading sensitive analog front-ends or high-impedance sensor nodes.
Can the 1.5KE47A-E3/51 be used in parallel to increase surge current handling?
No - the 1.5KE47A-E3/51 should not be paralleled without external current-sharing resistors due to VBR tolerances (±5% typical). Mismatched avalanche thresholds cause uneven current division, risking thermal runaway in one device. For higher surge capacity, select a single higher-rated device (e.g., 3.0KE47A) or implement staged protection with series impedance.
1.5KE47A-E3/51 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE47A-E3/51 FAQ
1.How can I place an order for 1.5KE47A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE47A-E3/51 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 1.5KE47A-E3/51 reliable?
The price and inventory of 1.5KE47A-E3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE47A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE47A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE47A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE47A-E3/51?
1.5KE47A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE47A-E3/51 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 1.5KE47A-E3/51?
For technical support, including 1.5KE47A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE47A-E3/51 requirements.
6.How does Aetrix verify that 1.5KE47A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE47A-E3/51 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 1.5KE47A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE47A-E3/51?
All 1.5KE47A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE47A-E3/51, 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 1.5KE47A-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE47A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE47A-E3/51 Tags
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