My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KA22AHE3/51
- Part No.:
- 1.5KA22AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA22AHE3/51.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:2,992
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KA22AHE3/51 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode designed for high-reliability clamping in power line and signal line protection. It features a 20.9 V to 23.1 V breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), 30.6 V maximum clamping voltage at 49.0 A, and AEC-Q101 qualification for under-hood automotive electronics.
For engineers reviewing the 1.5KA22AHE3/51 datasheet, 1.5KA22AHE3/51 pinout, 1.5KA22AHE3/51 application, or 1.5KA22AHE3/51 equivalent, key selection criteria include clamping performance under 10/1000 µs surge, junction temperature derating above 25 °C, unidirectional polarity requirement, and RoHS-compliant HE3 packaging with JESD201 Class 2 whisker resistance.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable high-temperature operation up to +185 °C junction temperature and low incremental surge resistance. Its unidirectional configuration provides forward conduction capability while clamping reverse transients, supporting robust protection of MOSFET gates and IC power rails against inductive switching spikes.
The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits a +0.092 %/°C temperature coefficient of VBR, enabling predictable voltage threshold shift across automotive thermal profiles. Clamping occurs within nanoseconds, with typical junction capacitance below 1000 pF at VWM = 18.8 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V - Ensures reliable turn-on before damage to downstream 24 V system components |
| VC @ IPPM | 30.6 V - Limits worst-case voltage seen by protected IC during 49.0 A transient |
| PPPM | 1500 W - Handles ISO 7637-2 Pulse 1/2a/5a surges without failure |
| IPPM | 49.0 A - Matches 10/1000 µs waveform energy for automotive load-dump immunity |
| TJ max. | +185 °C - Supports under-hood placement near engines or power converters |
| VWM | 18.8 V - Blocks normal 24 V rail operation while allowing margin for ripple and tolerance |
| Temp. Coeff. VBR | +0.092 %/°C - Predictable VBR drift enables accurate thermal design margining |
Pinout & Package
Package: Case Style 1.5KA - Axial-leaded, molded epoxy body 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 current entry / Cathode reference | Connected to ground or low-side return path in unidirectional clamp configuration |
| Cathode | Transient voltage sensing / Clamping node | Connected to protected line (e.g., 24 V supply rail); color band denotes this end |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR and low dynamic impedance over 1000+ surge cycles at 125 °C |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive under-hood use with zero defects in accelerated lifetime testing |
| 1500 W peak pulse power (10/1000 µs) | Meets ISO 16750-2 and SAE J1113-11 surge immunity requirements for 24 V systems |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes let-through energy to sensitive gate drivers and microcontrollers |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in high-humidity, high-temperature environments |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V rail and chassis ground to clamp positive surges. Use Value: Limits voltage to ≤30.6 V during 49 A transients, preventing damage to MCU power supplies and CAN transceivers. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal line and ground to absorb fast transients without distorting mV-level signals. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) with sub-nanosecond response, preserving signal integrity. |
| Motor Drive Gate Protection | Telecom DC Power Input Stage |
Use Scenario: Safeguarding high-side N-channel MOSFET gates driven by isolated gate drivers in BLDC inverters. IC Role / Device Role / Timing Role: TVS placed between gate and source to suppress Miller-induced voltage spikes during switching. Use Value: Withstands 200 A 8.3 ms surge (IFSM), preventing gate oxide rupture during short-circuit fault recovery. | Use Scenario: Front-end surge suppression on -48 V telecom rectifier outputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary unidirectional clamp on DC input before DC/DC converters and monitoring circuitry. Use Value: Delivers 1500 W pulse handling at -48 V system level, meeting GR-1089-CORE Level 3 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22AHE3/52 | Lower PPPM (600 W), smaller SMB package, same VBR range (20.9–23.1 V) | Suitable for space-constrained PCBs but limited to lower-energy transients | Select when board area is critical and surge energy does not exceed 600 W |
| 1.5KE22A | Same 1500 W rating but legacy DO-201 package; no AEC-Q101 qualification; higher VC (35.5 V) | Acceptable for industrial/commercial use where automotive reliability is not required | Select only for non-automotive designs needing cost-optimized legacy footprint |
Compared with 1.5KA22AHE3/51, SMBJ22AHE3/52 trades pulse power for compactness, while 1.5KE22A sacrifices automotive qualification and clamping efficiency for legacy compatibility-making 1.5KA22AHE3/51 optimal for new AEC-Q101-compliant 24 V systems demanding best-in-class VC and thermal stability.
Availability
1.5KA22AHE3/51 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface circuits, motor drive gate clamp networks, and telecom DC input stages requiring stable component supply across extended temperature and surge life cycles.
Supply support for 1.5KA22AHE3/51 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, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive environments, emphasizing thermal robustness, surge endurance, and long-term parametric stability under repeated stress.
FAQ
What is the exact breakdown voltage range for the 1.5KA22AHE3/51?
The 1.5KA22AHE3/51 has a guaranteed breakdown voltage (VBR) range of 20.9 V minimum to 23.1 V maximum, measured at 1.0 mA test current. This range ensures consistent clamping behavior across production lots and supports reliable coordination with 24 V system overvoltage thresholds.
Is the 1.5KA22AHE3/51 suitable for bidirectional transient protection?
No-the 1.5KA22AHE3/51 is unidirectional only, as confirmed in the Vishay datasheet Document Number 88300. It conducts in forward bias and clamps reverse transients; for bidirectional protection, a separate symmetric TVS or back-to-back configuration is required.
Does the 1.5KA22AHE3/51 meet automotive qualification standards?
Yes-the 1.5KA22AHE3/51 carries the HE3 suffix, indicating full AEC-Q101 qualification per Vishay's documentation. It is rated for operation from –65 °C to +185 °C and validated for high-temperature reliability, making it approved for under-hood automotive applications.
What is the maximum clamping voltage of the 1.5KA22AHE3/51 under surge conditions?
The 1.5KA22AHE3/51 clamps to a maximum of 30.6 V when subjected to its rated peak pulse current of 49.0 A (10/1000 µs waveform). This value is specified in the Electrical Characteristics table and defines the upper voltage limit imposed on protected circuitry during surge events.
How does the 1.5KA22AHE3/51 differ from the standard 1.5KA22A variant?
The 1.5KA22AHE3/51 includes the HE3 suffix, denoting RoHS compliance, high-reliability construction, and JESD201 Class 2 whisker resistance-features not guaranteed in the base 1.5KA22A. Both share identical electrical specs, but only HE3 meets automotive-grade process and plating requirements.
1.5KA22AHE3/51 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):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 49A
- 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
1.5KA22AHE3/51 FAQ
1.How can I place an order for 1.5KA22AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA22AHE3/51 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 1.5KA22AHE3/51 reliable?
The price and inventory of 1.5KA22AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA22AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA22AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA22AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA22AHE3/51?
1.5KA22AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA22AHE3/51 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 1.5KA22AHE3/51?
For technical support, including 1.5KA22AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA22AHE3/51 requirements.
6.How does Aetrix verify that 1.5KA22AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA22AHE3/51 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 1.5KA22AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA22AHE3/51?
All 1.5KA22AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA22AHE3/51, 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 1.5KA22AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA22AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA22AHE3/51 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 …
