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Vishay General Semiconductor - Diodes Division 1.5KE27AHE3_B/C
- Part No.:
- 1.5KE27AHE3_B/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE27AHE3_B/C.pdf
- Description:
- 1.5KW,27V 5%,UNIDIR,AXIAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,387
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Product details
Overview
1.5KE27AHE3_B/C from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails and signal lines. It features a 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 37.5 V maximum clamping voltage (VC) at 40 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 1.5KE27AHE3_B/C datasheet, 1.5KE27AHE3_B/C pinout, 1.5KE27AHE3_B/C application, or 1.5KE27AHE3_B/C equivalent, this device delivers verified AEC-Q101 qualification, glass-passivated junction reliability, RoHS-compliant matte tin leads, and UL 94 V-0 molded epoxy packaging - critical for automotive ECU, industrial PLC I/O, and telecom power supply designs requiring robust, repeatable surge immunity.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: when reverse voltage exceeds its breakdown threshold (25.7–28.4 V), it avalanches into low-impedance conduction within <1 ns, diverting surge current away from downstream circuitry. Its 37.5 V clamping voltage at 40 A ensures protected devices remain below safe operating limits during standardized 10/1000 µs transients.
Thermal design is supported by RθJA = 75 °C/W and RθJL = 15.4 °C/W, enabling effective heat dissipation through PCB copper and lead-frame conduction. The device sustains 200 A non-repetitive forward surge (8.3 ms half-sine) and exhibits 0.096 %/°C temperature coefficient of VBR, ensuring stable clamping across -55 °C to +175 °C junction operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise avalanche initiation window for reliable overvoltage detection |
| VWM | 23.1 V - maximum continuous reverse working voltage before leakage rises above 1 µA |
| VC @ IPPM | 37.5 V at 40 A - clamping voltage limiting stress on protected ICs during full-rated 1500 W surge |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity per industry-standard lightning test waveform |
| IFSM | 200 A (8.3 ms half-sine) - withstands high-current inductive kick without bond-wire failure |
| TJ range | -55 °C to +175 °C - supports under-hood automotive and industrial ambient environments |
| AEC-Q101 | Qualified - validated for automotive electronics per stress-test requirements including HTGB, HTRB, and TCT |
Pinout & Package
Package: Case Style 1.5KE - axial-leaded DO-201AD molded epoxy package with matte tin-plated leads, UL 94 V-0 rated, 0.375" (9.5 mm) lead length, 0.210" (5.3 mm) body diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional clamp configuration |
| Cathode | Avalanche conduction terminal | Marked with color band; connected to protected line (e.g., 24 V rail or signal input) to clamp positive transients |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, low-leakage (<1 µA at VWM) performance over lifetime and temperature cycling |
| 1500 W peak pulse power | Meets IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-line) without external series impedance |
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics where reliability under thermal and mechanical stress is mandatory |
| UL 94 V-0 epoxy molding | Prevents flame propagation in enclosed enclosures - required for industrial safety certifications |
| JESD 201 Class 2 whisker resistance | HE3 suffix confirms long-term solder joint integrity in high-reliability reflow and thermal cycling environments |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V/24 V battery rail in engine control units exposed to load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and ground to clamp spikes >28.4 V within nanoseconds. Use Value: Limits rail voltage to ≤37.5 V during 1500 W surges, preventing damage to MCU, CAN transceivers, and voltage regulators. |
Use Scenario: Analog input channel of a PLC module receiving 4–20 mA signals from field transmitters. IC Role / Device Role / Timing Role: Front-end TVS on signal line to absorb ESD and induced surges before precision op-amps and ADCs. Use Value: Clamps transients to 37.5 V while maintaining <1 µA leakage at 23.1 V, preserving signal accuracy and offset stability. |
| Telecom DC Power Entry Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: -48 V DC input stage of a base station power supply subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Unidirectional TVS on negative rail to suppress positive-going transients relative to chassis ground. Use Value: Withstands 200 A 8.3 ms surges and maintains clamping at 37.5 V, protecting rectifier diodes and bulk capacitors. |
Use Scenario: DC bus of a smart washing machine motor controller experiencing inductive kickback from brushed motor commutation. IC Role / Device Role / Timing Role: TVS across H-bridge supply rails to clamp flyback voltage spikes during PWM switching. Use Value: Fast <1 ns response prevents MOSFET avalanche failure; 175 °C max junction temperature accommodates sealed enclosure thermal rise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Lower PPPM (600 W), smaller SMB package (vs. DO-201AD), VBR = 26.7–29.5 V | Best suited for space-constrained PCBs with moderate surge requirements (IEC 61000-4-2/4-4) | Select SMBJ24A when board area is limited and peak surge energy does not exceed 600 W. |
| 1.5KE27CA | Bidirectional variant (VBR = 25.7–28.4 V), same package and PPPM, symmetrical clamping for AC-coupled or floating lines | Required for differential signal lines, RS-485 buses, or transformer-isolated interfaces where polarity reversal occurs | Choose 1.5KE27CA only when bidirectional clamping is mandated by system architecture. |
Compared with SMBJ24A, 1.5KE27AHE3_B/C provides 2.5× higher surge power headroom and superior thermal robustness via axial leads; versus 1.5KE27CA, it offers lower capacitance and simpler biasing for DC rail protection but lacks AC symmetry - making 1.5KE27AHE3_B/C optimal for cost-sensitive, high-energy unidirectional clamping where AEC-Q101 compliance is essential.
Availability
1.5KE27AHE3_B/C is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, and telecom power entry circuits requiring stable component supply, AEC-Q101 validation, and long-lifecycle support.
Supply support for 1.5KE27AHE3_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, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - delivering consistent 1500 W surge capability, AEC-Q101 qualification, and UL-certified packaging to meet Tier-1 automotive and industrial safety standards.
FAQ
What is the breakdown voltage tolerance of the 1.5KE27AHE3_B/C?
The 1.5KE27AHE3_B/C has a specified breakdown voltage range of 25.7 V to 28.4 V at 1 mA test current, corresponding to ±10 % tolerance around the nominal 27 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for protecting voltage-sensitive loads without premature conduction.
Is the 1.5KE27AHE3_B/C suitable for automotive applications?
Yes, the 1.5KE27AHE3_B/C is AEC-Q101 qualified per Vishay documentation (Note 2, page 3), confirming compliance with stress tests including high-temperature reverse bias, high-temperature operating life, and temperature cycling. Its -55 °C to +175 °C operating range and HE3 whisker-resistant plating make it suitable for under-hood and transmission-control module deployments.
How does the clamping voltage of the 1.5KE27AHE3_B/C compare to its breakdown voltage?
The 1.5KE27AHE3_B/C clamps at 37.5 V when subjected to its full 40 A peak pulse current (10/1000 µs), which is 31 % above its minimum breakdown voltage of 25.7 V. This incremental clamping voltage (ΔVC = 11.8 V) reflects low dynamic impedance during surge events, directly limiting stress on downstream components such as 36 V-rated DC-DC converters or automotive microcontrollers.
What is the meaning of the "HE3_B/C" suffix in 1.5KE27AHE3_B/C?
The "HE3" denotes RoHS-compliant construction with JESD 201 Class 2 whisker resistance; "B/C" indicates tape-and-reel packaging in 13-inch reels with 1400 units per reel (per Ordering Information table, page 3). This suffix confirms suitability for lead-free reflow assembly and long-term storage stability - critical for high-volume manufacturing of automotive and industrial electronics.
Can the 1.5KE27AHE3_B/C be used in bidirectional protection schemes?
No - the 1.5KE27AHE3_B/C is a unidirectional TVS diode, identifiable by its cathode band marking and specified VBR/VWM parameters for reverse-biased operation only. For bidirectional protection, Vishay specifies the 1.5KE27CA variant, which provides symmetrical clamping in both polarities and is explicitly listed in the bidirectional range (up to 1.5KE220CA).
1.5KE27AHE3_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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 42A
- 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
1.5KE27AHE3_B/C FAQ
1.How can I place an order for 1.5KE27AHE3_B/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE27AHE3_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 1.5KE27AHE3_B/C reliable?
The price and inventory of 1.5KE27AHE3_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 1.5KE27AHE3_B/C is usually 5 days.
3.What payment methods are accepted for 1.5KE27AHE3_B/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE27AHE3_B/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE27AHE3_B/C?
1.5KE27AHE3_B/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE27AHE3_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 1.5KE27AHE3_B/C?
For technical support, including 1.5KE27AHE3_B/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE27AHE3_B/C requirements.
6.How does Aetrix verify that 1.5KE27AHE3_B/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE27AHE3_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 1.5KE27AHE3_B/C meets industry standards.
7.What is the process for return or replacement of 1.5KE27AHE3_B/C?
All 1.5KE27AHE3_B/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE27AHE3_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 1.5KE27AHE3_B/C part is unused and in its original packaging.
Return procedure for 1.5KE27AHE3_B/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE27AHE3_B/C Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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