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Vishay General Semiconductor - Diodes Division 1.5KE33AHE3_B/C
- Part No.:
- 1.5KE33AHE3_B/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE33AHE3_B/C.pdf
- Description:
- 1.5KW,33V 5%,UNIDIR,AXIAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,004
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Product details
Overview
1.5KE33AHE3_B/C 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 33 V breakdown voltage (VBR = 31.4–34.7 V at 1 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 45.7 V at 32.8 A, and operates from –55 °C to +175 °C - deployed in automotive power supply inputs, industrial PLC I/O modules, and telecom line card surge protection.
For engineers reviewing the 1.5KE33AHE3_B/C datasheet, 1.5KE33AHE3_B/C pinout, 1.5KE33AHE3_B/C application, or 1.5KE33AHE3_B/C equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJL = 15.4 °C/W), JEDEC 1.5KE package dimensions, and direct alternative part comparisons - all confirmed against Vishay Document #88301 (Rev. 09-Aug-2022).
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its clamping action begins at 31.4 V (min VBR) and limits transient energy to ≤45.7 V at 32.8 A peak pulse current under 10/1000 µs waveform conditions.
Rated for 1500 W peak pulse power and 6.5 W steady-state dissipation on infinite heatsink, it supports repetitive surge events at ≤0.01% duty cycle. The device is RoHS-compliant (E3 suffix), AEC-Q101 qualified (HE3_B/C variant), and features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - defines precise voltage threshold where clamping initiates; ensures reliable turn-on before downstream IC damage. |
| VWM | 28.2 V - maximum continuous reverse working voltage; sets safe DC operating margin below breakdown. |
| VC @ IPPM | 45.7 V at 32.8 A - clamped voltage during full 1500 W transient; determines protected circuit's maximum stress level. |
| PPPM | 1500 W (10/1000 µs) - peak surge handling capacity; enables robust protection against lightning-induced surges per IEC 61000-4-5. |
| IFSM | 200 A (8.3 ms half-sine) - forward surge rating; supports high-energy inrush or fault currents without bond-wire failure. |
| TJ max | +175 °C - extended junction temperature rating; allows operation in under-hood automotive or high-ambient industrial environments. |
| RθJL | 15.4 °C/W - low junction-to-lead thermal resistance; enables efficient heat transfer to PCB copper or heatsink without derating. |
Pinout & Package
Package: JEDEC-standard Case Style 1.5KE - molded epoxy body with axial leads, UL 94 V-0 rated, 0.375" (9.5 mm) lead length, 0.210" (5.3 mm) body diameter. Cathode indicated by color band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to ground or low-side return path; must be routed with low-inductance trace for effective clamping. |
| Cathode | Current exit point in forward bias; marked with band | Connected to protected line (e.g., 24 V rail); polarity-critical - reverse connection disables protection. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5%) and long-term reliability under thermal cycling and humidity exposure. |
| AEC-Q101 qualified (HE3_B/C) | Validated for automotive applications including engine control units and ADAS power supplies per stress test requirements. |
| 1500 W peak pulse power | Meets Level 4 IEC 61000-4-5 surge immunity (4 kV line-earth, 2 kV line-line) without external series impedance. |
| Sub-nanosecond response time | Clamps transients within <1 ns - faster than MOVs or GDTs - preserving integrity of high-speed logic and analog front-ends. |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under high-temp/humidity, critical for long-life industrial and automotive deployments. |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary shunt clamp on main power rail; absorbs >150 J energy in <100 ms. Use Value: Limits rail voltage to ≤45.7 V during 1500 W surge, preventing MOSFET gate oxide rupture and MCU brownout. |
Use Scenario: 24 V digital input channels in programmable logic controllers subject to field-wiring induced transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input terminal and common; clamps negative-going spikes. Use Value: Maintains input logic threshold integrity by suppressing >1 kV fast transients before optocoupler input stage. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: DC-fed Ethernet switch power interfaces subjected to lightning-induced surges on PoE injectors. IC Role / Device Role / Timing Role: Secondary protection after gas discharge tube (GDT); handles residual energy with low clamping. Use Value: Reduces let-through voltage to 45.7 V at 32.8 A, enabling use of lower-voltage-rated DC-DC converters downstream. |
Use Scenario: Brushed DC motor H-bridge power stages in home appliances experiencing back-EMF spikes during commutation. IC Role / Device Role / Timing Role: Across motor terminals (cathode to +V, anode to GND) to clamp inductive kickback. Use Value: Dissipates 1500 W transient energy without degradation, extending MOSFET lifetime and eliminating snubber losses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | DO-214AA (SMB) package; 600 W PPPM; VC = 53.3 V @ 11.8 A; RθJL = 35 °C/W | Lower power rating and higher clamping voltage limit suitability to consumer-grade, non-automotive designs. | Select SMBJ33A only when board space constraints prohibit axial 1.5KE and surge levels remain ≤600 W. |
| 1.5KE33CA | Bidirectional variant; same VBR, VC, and PPPM; no polarity marking; symmetric clamping in AC or floating lines. | Required for AC-coupled sensor interfaces or RS-485 bus lines where bidirectional transients dominate. | Choose 1.5KE33CA instead of 1.5KE33AHE3_B/C only when protecting balanced differential signals or transformer-coupled circuits. |
Compared with SMBJ33A, the 1.5KE33AHE3_B/C delivers 2.5× higher surge power and 7.6 V lower clamping voltage - critical for protecting 3.3 V/5 V logic rails. Versus 1.5KE33CA, it offers superior thermal performance (RθJL = 15.4 vs. ~18 °C/W) and AEC-Q101 qualification, making it preferred for automotive power domains.
Availability
1.5KE33AHE3_B/C is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial PLC I/O modules, and telecom line card surge protection requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE33AHE3_B/C 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 automotive, industrial, and computing markets.
The 1.5KE family was engineered for high-energy transient suppression in harsh environments - emphasizing AEC-Q101 qualification, stable VBR tolerance, and robust thermal performance in axial-leaded packages.
FAQ
What is the exact breakdown voltage range for 1.5KE33AHE3_B/C?
The 1.5KE33AHE3_B/C has a guaranteed breakdown voltage (VBR) range of 31.4 V to 34.7 V at 1 mA test current, per Vishay Document #88301. This ±5% tolerance ensures consistent clamping onset across production lots and temperature extremes from –55 °C to +175 °C. The value is measured under standardized JEDEC conditions and applies directly to the 1.5KE33AHE3_B/C device.
Is 1.5KE33AHE3_B/C AEC-Q101 qualified?
Yes, the 1.5KE33AHE3_B/C is explicitly AEC-Q101 qualified, as confirmed in Vishay Document #88301 (Rev. 09-Aug-2022), Note (2) under Ratings and Characteristics Curves. Qualification covers the HE3_B and HE3_C variants and validates performance under temperature cycling, humidity, and mechanical stress tests required for automotive under-hood applications.
What does the "HE3_B/C" suffix mean in 1.5KE33AHE3_B/C?
The "HE3_B/C" suffix indicates RoHS-compliant construction (E3), AEC-Q101 qualification (H), and revision code B/C per Vishay's ordering nomenclature. "B/C" denotes manufacturing revision level - not a functional difference - and confirms compliance with JESD 201 Class 2 whisker testing, unlike standard E3 parts which meet only Class 1A.
How does 1.5KE33AHE3_B/C compare to 1.5KE33A-E3 in terms of reliability?
The 1.5KE33AHE3_B/C adds AEC-Q101 qualification and JESD 201 Class 2 whisker resistance to the base 1.5KE33A-E3 specification. While both share identical electrical parameters (VBR, VC, PPPM), the HE3_B/C variant undergoes additional stress screening for automotive use - including extended temperature cycling and high-humidity bias testing - making it suitable for mission-critical 1.5KE33AHE3_B/C deployments.
Can 1.5KE33AHE3_B/C be used in parallel to increase surge handling?
Yes, 1.5KE33AHE3_B/C devices may be paralleled to increase total peak pulse power, but only with matched VBR (≤1% spread) and symmetrical PCB layout to ensure current sharing. Vishay's Application Notes (Document #88301, p. 5) confirm this practice for >1500 W requirements - however, thermal coupling and lead inductance must be minimized to avoid imbalance during 10/1000 µs transients.
1.5KE33AHE3_B/C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 34A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE33AHE3_B/C FAQ
1.How can I place an order for 1.5KE33AHE3_B/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE33AHE3_B/C 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 1.5KE33AHE3_B/C reliable?
The price and inventory of 1.5KE33AHE3_B/C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE33AHE3_B/C is usually 5 days.
3.What payment methods are accepted for 1.5KE33AHE3_B/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE33AHE3_B/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE33AHE3_B/C?
1.5KE33AHE3_B/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE33AHE3_B/C 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 1.5KE33AHE3_B/C?
For technical support, including 1.5KE33AHE3_B/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE33AHE3_B/C requirements.
6.How does Aetrix verify that 1.5KE33AHE3_B/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE33AHE3_B/C 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 1.5KE33AHE3_B/C meets industry standards.
7.What is the process for return or replacement of 1.5KE33AHE3_B/C?
All 1.5KE33AHE3_B/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE33AHE3_B/C, 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 1.5KE33AHE3_B/C part is unused and in its original packaging.
Return procedure for 1.5KE33AHE3_B/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE33AHE3_B/C Tags
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