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Vishay General Semiconductor - Diodes Division 1.5KA30HE3/51
- Part No.:
- 1.5KA30HE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA30HE3/51.pdf
- Description:
- TVS DIODE 24.3VWM 43.5VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:3,815
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Product details
Overview
1.5KA30HE3/51 from Vishay General Semiconductor is a unidirectional automotive-grade 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 43.5 V under 34.5 A peak pulse current, and operates up to +185 °C junction temperature - enabling robust protection of MOSFETs and sensor interfaces in engine control units.
For engineers reviewing the 1.5KA30HE3/51 datasheet, 1.5KA30HE3/51 pinout, 1.5KA30HE3/51 application, or 1.5KA30HE3/51 equivalent, key selection criteria include its AEC-Q101 qualification, 24.3 V stand-off voltage, low 0.097 %/°C VBR temperature coefficient, and HE3 suffix confirming JESD201 Class 2 whisker resistance and RoHS compliance.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable clamping under repeated surge stress and maintains low incremental surge resistance to minimize voltage overshoot during fast transients. Its unidirectional polarity and 10/1000 µs waveform rating align with IEC 61000-4-5 and ISO 7637-2 standards for automotive load-dump and inductive-switching immunity.
The device features a molded epoxy case rated UL 94 V-0, matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and is characterized across -65 °C to +185 °C operating range - supporting placement near high-temperature power stages without derating penalties.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains single high-energy surges common in automotive load-dump events without failure |
| Stand-off Voltage (VWM) | 24.3 V - sets maximum continuous reverse operating voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 27.0–33.0 V at 1 mA - defines onset of avalanche conduction and ensures margin above VWM |
| Clamping Voltage (VC) | 43.5 V at 34.5 A - limits downstream voltage stress on protected ICs during full-rated surge |
| Junction Temperature Range | -65 °C to +185 °C - enables direct mounting on high-temp PCB zones in under-hood ECUs |
| Surge Current (IPPM) | 34.5 A (10/1000 µs) - quantifies maximum transient current the device safely shunts to ground |
| Temp. Coefficient of VBR | 0.097 %/°C - ensures predictable voltage shift over temperature, critical for precision rail protection |
Pinout & Package
Package: Case Style 1.5KA - axial-lead, molded epoxy body with cathode band marking; UL 94 V-0 rated; lead length 0.375" (9.5 mm); diameter 0.210" (5.3 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to protected circuit ground or low-side return path in unidirectional configuration |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., 24 V supply rail); color band identifies this end |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable clamping performance and low dynamic impedance across >1000 surge cycles |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive under-hood use with extended temperature cycling and mechanical shock testing |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal/humidity stress, ensuring long-term solder joint reliability |
| 1500 W peak pulse power (10/1000 µs) | Meets ISO 7637-2 Pulse 5a requirements for 24 V systems without external heat sinking |
| Low 0.097 %/°C VBR tempco | Maintains tight clamping window across full automotive temperature range (-40 °C to +125 °C ambient) |
Applications
| Engine Control Unit (ECU) Power Rail Protection | Automotive Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protects 24 V supply input of diesel ECU against ISO 7637-2 load-dump transients up to 60 V. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground to clamp surges within 1 ns response time. Use Value: Limits rail voltage to ≤43.5 V during 34.5 A transients, preventing damage to MCU power management ICs and gate drivers. |
Use Scenario: Shields LIN bus or analog sensor outputs (e.g., pressure, temperature) from inductive switching noise in HVAC actuators. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed at connector interface to absorb ESD and coupled transients. Use Value: Maintains signal integrity with <1 nA leakage at 24.3 V, while clamping fast edges to protect ADC front-ends and transceiver inputs. |
| Body Control Module (BCM) Load Switch Protection | Start-Stop System Battery Monitoring Circuit |
|
Use Scenario: Safeguards high-side MOSFET drivers controlling headlamps or relays against inductive kickback from coil de-energization. IC Role / Device Role / Timing Role: TVS connected drain-to-source to clamp voltage spikes exceeding MOSFET VDSS rating. Use Value: Absorbs 1500 W pulses without degradation, extending MOSFET lifetime and eliminating need for snubber RC networks. |
Use Scenario: Protects battery voltage sensing input of start-stop controller during cranking-induced dips and alternator ripple. IC Role / Device Role / Timing Role: Stand-off-regulated TVS placed upstream of precision voltage divider to prevent overvoltage saturation of monitoring op-amps. Use Value: Ensures accurate battery state-of-charge estimation by limiting transient excursions to ≤43.5 V while maintaining <1 µA leakage at 13.8 V nominal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24AHE3/52 | Lower PPPM (600 W), lower VC (38.9 V at 15.4 A), same AEC-Q101/HE3 qualification | Better suited for lower-energy transients (e.g., ISO 10605 ESD) but insufficient for full load-dump duty | Select when system-level surge energy is confirmed ≤600 W and tighter clamping voltage is prioritized |
| 1.5KE33A | Non-automotive grade, no AEC-Q101, higher VC (53.3 V), same 1500 W rating | Lacks whisker resistance and high-temp reliability validation; not approved for under-hood deployment | Acceptable only for industrial or consumer applications where AEC-Q101 and 185 °C TJ are not required |
Compared with SMBJ24AHE3/52 and 1.5KE33A, the 1.5KA30HE3/51 uniquely combines AEC-Q101 qualification, 185 °C operation, and 1500 W capability - making it the only option validated for sustained under-hood surge protection in modern 24 V commercial vehicle ECUs.
Availability
1.5KA30HE3/51 is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and start-stop battery monitoring circuits requiring stable component supply with full AEC-Q101 traceability and long-lifecycle support.
Supply support for 1.5KA30HE3/51 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 environments.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in 12 V and 24 V automotive power systems - emphasizing thermal stability, surge endurance, and process-controlled whisker resistance.
FAQ
What is the clamping voltage of the 1.5KA30HE3/51 and how is it measured?
The 1.5KA30HE3/51 has a maximum clamping voltage (VC) of 43.5 V, measured at a peak pulse current (IPPM) of 34.5 A using a 10/1000 µs waveform per IEC 61000-4-5. This value represents the upper voltage limit imposed on the protected line during full-rated surge events and is verified per Vishay Document Number 88300, page 2.
Is the 1.5KA30HE3/51 qualified for automotive under-hood applications?
Yes, the 1.5KA30HE3/51 is AEC-Q101 qualified and designated as automotive grade per its HE3 suffix. It supports operation from -65 °C to +185 °C junction temperature and passes JESD201 Class 2 whisker testing - meeting requirements for placement in engine compartments and transmission control units.
What does the "HE3" suffix mean in 1.5KA30HE3/51?
The HE3 suffix indicates RoHS compliance, high-reliability construction, AEC-Q101 qualification, and JESD201 Class 2 whisker resistance. It also confirms matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards - distinguishing it from commercial-grade variants.
How does the 1.5KA30HE3/51 differ from the 1.5KA30A variant?
The 1.5KA30HE3/51 has a breakdown voltage range of 27.0–33.0 V and stand-off voltage of 24.3 V, while the 1.5KA30A variant specifies 28.5–31.5 V VBR and 25.6 V VWM. Both share identical PPPM (1500 W), VC (41.4 V), and AEC-Q101 qualification - but the "A" version offers tighter VBR tolerance for precision rail alignment.
Can the 1.5KA30HE3/51 be used in 12 V automotive systems?
Yes, the 1.5KA30HE3/51 is commonly deployed in 12 V systems for protecting high-side switches and power ICs against load-dump transients, provided the system's maximum steady-state rail voltage remains below its 24.3 V stand-off rating. Its 43.5 V clamping level provides adequate margin for 12 V MCU I/O and power stage components.
1.5KA30HE3/51 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):
- 24.3V
- Voltage - Breakdown (Min):
- 27V
- Voltage - Clamping (Max) @ Ipp:
- 43.5V
- Current - Peak Pulse (10/1000µs):
- 34.5A
- 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
1.5KA30HE3/51 FAQ
1.How can I place an order for 1.5KA30HE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA30HE3/51 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 1.5KA30HE3/51 reliable?
The price and inventory of 1.5KA30HE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA30HE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA30HE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA30HE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA30HE3/51?
1.5KA30HE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA30HE3/51 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 1.5KA30HE3/51?
For technical support, including 1.5KA30HE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA30HE3/51 requirements.
6.How does Aetrix verify that 1.5KA30HE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA30HE3/51 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 1.5KA30HE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA30HE3/51?
All 1.5KA30HE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA30HE3/51, 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 1.5KA30HE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA30HE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA30HE3/51 Tags
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