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Vishay General Semiconductor - Diodes Division 1.5SMC43CAHE3_A/H
- Part No.:
- 1.5SMC43CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43CAHE3_A/H.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,029
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Product details
Overview
1.5SMC43CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients up to 1500 W peak pulse power (10/1000 μs), with a standoff voltage of 36.8 V, clamping voltage of 59.3 V at 25.3 A, and AEC-Q101 qualification for automotive electronics protection.
For engineers reviewing the 1.5SMC43CAHE3_A/H datasheet, 1.5SMC43CAHE3_A/H pinout, 1.5SMC43CAHE3_A/H application, or 1.5SMC43CAHE3_A/H equivalent, this part serves as a robust, RoHS-compliant, bidirectional TVS for ESD and surge suppression in automotive sensor interfaces, power supply rails, and communication lines where fast response (<1 ns), low clamping ratio, and high surge current capability are required.
Technical Context
The 1.5SMC43CAHE3_A/H operates as a bidirectional avalanche diode, symmetrically clamping voltage surges in both polarities without polarity marking. Its glass-passivated junction enables stable breakdown behavior and low leakage (<1.0 μA at 36.8 V), while its thermal resistance (RθJA = 75 °C/W) supports operation up to 150 °C junction temperature under defined PCB pad layout (8.0 mm × 8.0 mm copper).
It delivers 25.3 A peak pulse current (IPPM) at 59.3 V clamping voltage under standardized 10/1000 μs waveform, with a breakdown voltage range of 40.9–45.2 V at 1.0 mA test current and temperature coefficient of +0.101 %/°C - enabling predictable voltage tolerance across automotive ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 36.8 V - maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold. |
| Breakdown Voltage (VBR) | 40.9–45.2 V at 1.0 mA - precise avalanche initiation point ensuring repeatable transient response across production lots. |
| Clamping Voltage (VC) | 59.3 V at 25.3 A - limits downstream circuit voltage during surge, providing 1.45× VWM clamping ratio for effective IC/MOSFET protection. |
| Peak Pulse Power (PPPM) | 1500 W (10/1000 μs) - sustains high-energy transients such as ISO 7637-2 pulse 5a/b or IEC 61000-4-5 surge events. |
| Operating Temperature | −65 °C to +150 °C - supports under-hood automotive environments and industrial control systems with wide thermal cycling. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HTOL, temperature cycling, and ESD testing per JESD22 standards. |
| Package | SMC (DO-214AB) - surface-mount outline with 8.0 mm × 8.0 mm thermal pads, MSL Level 1, 260 °C reflow compatible. |
Pinout & Package
Package: SMC (DO-214AB), bidirectional device with no polarity marking; terminals are matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Bidirectional terminals - either terminal conducts when voltage exceeds ±VBR; no cathode band or polarity identification required. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against severe automotive load-dump and lightning-induced surges without derating on standard PCB layouts. |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage (<1 μA) over temperature and lifetime, critical for battery-powered sensors. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-failure field reliability. |
| Low clamping ratio (1.45× VWM) | Minimizes stress on downstream 48 V or 36 V-rated components like CAN transceivers and microcontrollers. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control units from inductive switching noise and battery line transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal and ground, responding within <1 ns to suppress spikes above ±45 V. Use Value: Prevents latch-up or damage to 12-bit ADC inputs and op-amps by limiting transient voltage to ≤59.3 V while maintaining <1 μA leakage at 36.8 V. |
Use Scenario: Safeguarding CAN_H/CAN_L differential pair in vehicle infotainment gateways against ESD (IEC 61000-4-2) and surge (IEC 61000-4-5). IC Role / Device Role / Timing Role: Symmetric TVS pair (one per line) referenced to ground, conducting only during overvoltage events without affecting normal 0–5 V signaling. Use Value: Maintains CAN signal integrity with <0.5 pF junction capacitance at 0 V bias, while clamping common-mode surges to <60 V to preserve transceiver SOA. |
| DC-DC Converter Input Protection | 48 V Onboard Charger Communication Lines |
Use Scenario: Shielding buck converter input stage from 12 V/48 V rail transients caused by relay bounce or alternator load dump. IC Role / Device Role / Timing Role: Primary overvoltage clamp mounted directly at converter input capacitor, absorbing 1500 W pulses without thermal runaway. Use Value: Extends MOSFET lifetime by limiting drain-source voltage to 59.3 V during 100 ms load-dump events, avoiding avalanche stress beyond rated energy. |
Use Scenario: Securing UART/I²C lines between BMS and onboard charger in EV platforms exposed to high-voltage coupling and ground bounce. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp on each data line, grounded to chassis to shunt coupled transients away from logic-level ICs. Use Value: Enables reliable firmware updates and fault reporting by preventing false resets or bit errors during 48 V system switching transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43CA | Lower peak power (400 W), SMA package (smaller thermal mass), higher RθJA (110 °C/W), same VWM/VC specs. | Suitable for space-constrained consumer electronics but not automotive under-hood due to insufficient surge rating and thermal derating. | Select when board area is limited and surge energy is ≤400 W; avoid for ISO 7637-2 compliance. |
| 1.5KE43CA | Through-hole DO-201 package, identical electrical specs, higher mounting thermal resistance, no AEC-Q101 qualification. | Acceptable for industrial power supplies where reflow compatibility and automotive qualification are not required. | Choose for legacy through-hole designs or cost-sensitive non-automotive applications; verify manual assembly process compatibility. |
Compared with 1.5SMC43CAHE3_A/H, SMAJ43CA offers smaller footprint but sacrifices 73 % peak power handling and automotive qualification, while 1.5KE43CA retains full electrical performance but lacks SMT process support and AEC-Q101 validation - making 1.5SMC43CAHE3_A/H the only option meeting all three criteria: 1500 W, SMC package, and AEC-Q101.
Availability
1.5SMC43CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus hardening, and 48 V DC-DC input safeguarding requiring stable component supply, AEC-Q101 traceability, and consistent SMC (DO-214AB) packaging.
Supply support for 1.5SMC43CAHE3_A/H 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 1.5SMC Series was developed specifically for surface-mount transient suppression in harsh environments, emphasizing AEC-Q101 qualification, high-power pulse handling, and robust thermal performance in compact SMC packages.
FAQ
What is the clamping voltage of the 1.5SMC43CAHE3_A/H at its rated peak pulse current?
The 1.5SMC43CAHE3_A/H has a maximum clamping voltage (VC) of 59.3 V at 25.3 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per Vishay's datasheet Figure 1 and Table on page 2, confirming its ability to limit transient voltage to a safe level for downstream 48 V-rated components. The 1.5SMC43CAHE3_A/H maintains this clamping performance across its qualified temperature range.
Is the 1.5SMC43CAHE3_A/H suitable for automotive applications?
Yes, the 1.5SMC43CAHE3_A/H is explicitly AEC-Q101 qualified, as indicated by the "HE3" suffix and confirmed in the Vishay document revision 09-Mar-2026. It meets automotive reliability requirements including high-temperature operating life, temperature cycling, and ESD immunity. The 1.5SMC43CAHE3_A/H is rated for −65 °C to +150 °C operation and supports under-hood and powertrain applications where transient suppression must remain stable over extended lifetimes.
What does the "CA" suffix mean in 1.5SMC43CAHE3_A/H?
The "CA" suffix in 1.5SMC43CAHE3_A/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., "A" suffix), the 1.5SMC43CAHE3_A/H has no polarity marking and functions identically in either orientation, making it ideal for AC-coupled lines, differential buses like CAN, or any application where polarity reversal or bipolar surges may occur.
What is the standoff voltage (VWM) of the 1.5SMC43CAHE3_A/H, and how does it relate to system design?
The standoff voltage (VWM) of the 1.5SMC43CAHE3_A/H is 36.8 V - the maximum continuous reverse voltage it can block without significant leakage (<1.0 μA). In system design, VWM must exceed the maximum steady-state operating voltage (e.g., 36 V nominal battery systems) by ≥10 % to prevent false triggering. The 1.5SMC43CAHE3_A/H's 36.8 V VWM ensures compatibility with 36 V and 48 V architectures while preserving margin before clamping begins at 40.9 V.
Does the 1.5SMC43CAHE3_A/H require a heatsink for standard operation?
No, the 1.5SMC43CAHE3_A/H does not require an external heatsink for transient suppression duty cycles (e.g., <0.01 % duty cycle per datasheet), as its thermal design relies on PCB copper pad area (minimum 8.0 mm × 8.0 mm per terminal) for heat dissipation. Its RθJA of 75 °C/W is specified under that layout. For continuous power dissipation, the 6.5 W rating applies only at TA = 50 °C with infinite heatsink - but the 1.5SMC43CAHE3_A/H is intended for pulsed, not steady-state, operation.
1.5SMC43CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 25.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC43CAHE3_A/H FAQ
1.How can I place an order for 1.5SMC43CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43CAHE3_A/H 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 1.5SMC43CAHE3_A/H reliable?
The price and inventory of 1.5SMC43CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC43CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC43CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43CAHE3_A/H?
1.5SMC43CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43CAHE3_A/H 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 1.5SMC43CAHE3_A/H?
For technical support, including 1.5SMC43CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43CAHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC43CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43CAHE3_A/H 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 1.5SMC43CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC43CAHE3_A/H?
All 1.5SMC43CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43CAHE3_A/H, 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 1.5SMC43CAHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC43CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43CAHE3_A/H Tags
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