My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KA30AHE3/51
- Part No.:
- 1.5KA30AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA30AHE3/51.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:2,786
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KA30AHE3/51 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in power rails and signal lines. It delivers 1500 W peak pulse power (10/1000 µs), clamps at 41.4 V under 36.2 A peak pulse current, and operates up to +185 °C junction temperature - ideal for protecting MOSFETs and sensor interfaces in automotive engine control units.
For engineers reviewing the 1.5KA30AHE3/51 datasheet, 1.5KA30AHE3/51 pinout, 1.5KA30AHE3/51 application, or 1.5KA30AHE3/51 equivalent, key selection criteria include its AEC-Q101 qualification, 28.5–31.5 V breakdown range, low 0.097 %/°C VBR tempco, and HE3 suffix compliance with JESD201 Class 2 whisker resistance.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable clamping under repetitive surge stress and high-temperature operation. Its unidirectional polarity enables integration into DC-biased circuits without reverse leakage concerns, and its 10/1000 µs waveform response supports IEC 61000-4-5 Level 4 compliance when properly routed and decoupled.
The device features a molded epoxy case meeting UL 94 V-0, matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and a color band indicating cathode polarity. Its 1.5KA case style provides mechanical robustness for automotive under-hood environments with thermal cycling from –65 °C to +185 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains single high-energy transients from load dump or inductive switching without failure |
| Breakdown Voltage (VBR) | 28.5 V min / 31.5 V max at 1 mA - defines precise clamping onset for 24 V automotive systems |
| Clamping Voltage (VC) | 41.4 V at 36.2 A - limits downstream voltage stress during worst-case surge events |
| Stand-off Voltage (VWM) | 25.6 V - ensures no conduction during normal 24 V rail operation including tolerance and ripple |
| Junction Temperature Range | –65 °C to +185 °C - validated for under-hood placement in AEC-Q101 qualified automotive modules |
| Surge Current (IFSM) | 200 A (8.3 ms half-sine) - withstands repeated motor commutation or alternator load dump surges |
| Tempco of VBR | 0.097 %/°C - enables predictable clamping shift across full operating temperature range |
Pinout & Package
Package: Case Style 1.5KA - axial-leaded, molded epoxy body (UL 94 V-0), 0.375" (9.5 mm) lead length, 0.210" (5.3 mm) body diameter, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to system ground or low-side reference in unidirectional clamp configuration |
| Cathode | Protected line connection / clamping node | Connected to line being protected (e.g., 24 V supply rail or sensor output); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance over 1000+ surge cycles without parameter drift |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| HE3 suffix compliance | Meets JESD201 Class 2 whisker resistance - critical for long-term reliability in high-vibration environments |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
| RoHS-compliant molding compound | UL 94 V-0 rated epoxy ensures flame resistance and halogen-free compliance for automotive OEMs |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Protecting 24 V power input and CAN transceiver supply lines against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed at ECU main power entry point to clamp transients before they reach LDOs and microcontrollers. Use Value: Clamps to 41.4 V at 36.2 A, preventing damage to 36 V-rated downstream regulators and ensuring ASIL-B functional safety integrity. | Use Scenario: Safeguarding gate driver supply rails and feedback signal paths in variable-frequency drives exposed to IGBT switching noise. IC Role / Device Role / Timing Role: Standoff protection element on isolated 15–24 V auxiliary supplies feeding optocouplers and current sense amplifiers. Use Value: Withstands 200 A surge (8.3 ms) and maintains <1 µA leakage at 25.6 V, eliminating false triggering in precision analog monitoring circuits. |
| Automotive Sensor Module (e.g., ABS) | Telecom Power Shelf Protection |
Use Scenario: Shielding Hall-effect and wheel speed sensor outputs from ESD and inductive kickback in brake control systems. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on differential sensor lines referenced to chassis ground. Use Value: 0.097 %/°C VBR tempco ensures stable clamping threshold across –40 °C to +125 °C ambient, preserving signal fidelity. | Use Scenario: Front-end surge suppression on -48 V telecom DC distribution boards subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on input bus before DC/DC converters and hot-swap controllers. Use Value: 1500 W peak pulse rating meets GR-1089-CORE Level 3 requirements for central office equipment with minimal PCB footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30AHE3/52 | Same VBR range (28.5–31.5 V) and 600 W rating; SMB package (surface-mount), lower IPPM (32.4 A) | Designed for PCB space-constrained designs; lacks AEC-Q101 qualification and 1500 W capability | Select when board area is limited and surge energy is ≤600 W; not suitable for load dump protection |
| 1.5KE30A | Same VBR/VC specs but legacy 1.5KE case; non-automotive grade, no HE3 whisker test, max TJ = 175 °C | General industrial use only; not qualified for automotive temperature or reliability stress testing | Select for cost-sensitive non-automotive applications where AEC-Q101 and 185 °C operation are not required |
Compared with SMBJ30AHE3/52 and 1.5KE30A, the 1.5KA30AHE3/51 uniquely combines 1500 W surge capacity, AEC-Q101 qualification, and 185 °C operation - making it the only option for high-reliability 24 V automotive power rail protection where sustained thermal and mechanical stress is expected.
Availability
1.5KA30AHE3/51 is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive interface protection, and telecom power shelf surge suppression requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for 1.5KA30AHE3/51 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 high-reliability diodes, rectifiers, and protection devices for demanding industrial and automotive applications.
The 1.5KA series was engineered specifically for AEC-Q101-compliant automotive transient suppression, emphasizing thermal stability, surge endurance, and whisker-resistant terminations in axial-leaded packages for under-hood deployment.
FAQ
What is the exact breakdown voltage range for the 1.5KA30AHE3/51?
The 1.5KA30AHE3/51 has a guaranteed breakdown voltage (VBR) range of 28.5 V minimum to 31.5 V maximum, measured at 1 mA test current per the Vishay datasheet (Doc #88300). This tight tolerance ensures reliable clamping onset in 24 V automotive systems where overvoltage thresholds must be precisely controlled to avoid nuisance tripping or insufficient protection.
Is the 1.5KA30AHE3/51 qualified for automotive use?
Yes, the 1.5KA30AHE3/51 is AEC-Q101 qualified and designated as automotive grade (base P/NHE3). It undergoes rigorous stress testing including temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - all documented in Vishay's qualification report supporting Doc #88300. This makes the 1.5KA30AHE3/51 suitable for engine control, transmission, and ADAS modules.
What does the HE3 suffix mean on the 1.5KA30AHE3/51?
On the 1.5KA30AHE3/51, the HE3 suffix indicates RoHS-compliant construction with matte tin-plated leads that meet JESD201 Class 2 whisker resistance requirements. This prevents tin whisker growth under thermal and mechanical stress - a critical reliability feature for automotive and industrial applications where field failures due to latent shorts must be eliminated.
How does the 1.5KA30AHE3/51 compare to standard 1.5KE series TVS diodes?
The 1.5KA30AHE3/51 differs from legacy 1.5KE30A in three key ways: it is AEC-Q101 qualified, rated for 185 °C maximum junction temperature (vs. 175 °C), and carries the HE3 whisker-resistant plating. These enhancements make the 1.5KA30AHE3/51 appropriate for under-hood automotive use where the 1.5KE30A is restricted to commercial or industrial environments.
What is the clamping voltage of the 1.5KA30AHE3/51 at its rated peak pulse current?
The 1.5KA30AHE3/51 clamps to a maximum of 41.4 V at its rated peak pulse current of 36.2 A (10/1000 µs waveform), as specified in the Electrical Characteristics table of Vishay Doc #88300. This clamping level ensures safe operation of downstream 42 V-tolerant components such as automotive-grade DC/DC controllers and gate drivers.
1.5KA30AHE3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 36.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KA
1.5KA30AHE3/51 FAQ
1.How can I place an order for 1.5KA30AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA30AHE3/51 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 1.5KA30AHE3/51 reliable?
The price and inventory of 1.5KA30AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA30AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA30AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA30AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA30AHE3/51?
1.5KA30AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA30AHE3/51 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 1.5KA30AHE3/51?
For technical support, including 1.5KA30AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA30AHE3/51 requirements.
6.How does Aetrix verify that 1.5KA30AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA30AHE3/51 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 1.5KA30AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA30AHE3/51?
All 1.5KA30AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA30AHE3/51, 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 1.5KA30AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA30AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA30AHE3/51 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
