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Vishay General Semiconductor - Diodes Division 1.5SMC39CAHE3_A/H
- Part No.:
- 1.5SMC39CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39CAHE3_A/H.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,162
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Product details
Overview
1.5SMC39CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 33.3 V standoff voltage (VWM), 37.1–41.0 V breakdown voltage (VBR) at 1 mA, 53.9 V maximum clamping voltage (VC) at 27.8 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC39CAHE3_A/H datasheet, 1.5SMC39CAHE3_A/H pinout, 1.5SMC39CAHE3_A/H application, or 1.5SMC39CAHE3_A/H equivalent, this device serves as a RoHS-compliant, AEC-Q101-qualified TVS for high-reliability bidirectional surge suppression where low clamping ratio, fast response (<1 ns), and stable thermal performance up to +150 °C junction temperature are critical selection criteria.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping behavior during positive and negative transients. Its glass-passivated junction ensures stable leakage (<1 μA at VWM) and repeatable breakdown characteristics, while the SMC (DO-214AB) package supports automated placement and meets MSL Level 1 per J-STD-020 at 260 °C peak reflow.
The device sustains 1500 W peak pulse power under standardized 10/1000 μs waveform conditions with 0.01% duty cycle, and its thermal resistance (RθJA = 75 °C/W) enables reliable operation on standard 8.0 mm × 8.0 mm copper pads without additional heatsinking in most industrial and automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold. |
| VBR (min/max) | 37.1 V / 41.0 V at 1 mA - Confirmed breakdown range ensuring predictable turn-on during surges without premature conduction. |
| VC @ IPPM | 53.9 V at 27.8 A - Clamping voltage limits downstream IC stress during worst-case 1500 W transient events. |
| PPPM | 1500 W - Peak pulse power handling capability with 10/1000 μs waveform, enabling protection against lightning-induced and inductive-switching transients. |
| TJ max | +150 °C - Maximum junction temperature rating supporting operation in under-hood automotive and high-ambient industrial environments. |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient on standard PCB pad layout, informing derating requirements above 25 °C ambient. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals suitable for AC-coupled or floating signal/power line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient path | Both terminals function identically; no cathode band marking - enables placement without orientation check in automated assembly. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity in properly designed circuits with minimal external impedance. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during clamping, reducing risk of damage to 3.3 V or 5 V logic interfaces downstream. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage current across temperature and humidity stress conditions. |
| MSL Level 1, 260 °C peak reflow | Enables compatibility with standard lead-free SMT processes without moisture sensitivity concerns or baking requirements. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS sensor modules requiring zero-failure field reliability. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to shunt surge energy before it reaches sensitive ASIC inputs. Use Value: Maintains signal integrity during 100 V/50 ms load dump events by clamping to ≤53.9 V, preventing latch-up or gate oxide rupture in 3.3 V microcontrollers. |
Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers against field-wiring transients and relay coil flyback. IC Role / Device Role: Primary overvoltage suppressor mounted directly at connector entry point to absorb >1 kV/0.5 J surges before reaching optocoupler or Schmitt trigger input stage. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) standards without adding series impedance that degrades signal rise time. |
| Telecom Line Interface Protection | Consumer Power Adapter Secondary-Side Protection |
Use Scenario: Shielding Ethernet PHY magnetics and PoE interface circuitry from induced lightning surges on outdoor cabling in access switches and base stations. IC Role / Device Role: Bidirectional TVS placed across transformer secondary windings or RJ45 jack pins to limit common-mode transients to safe levels. Use Value: Withstands repeated 10/1000 μs surges up to 1500 W without parameter drift, extending field life in unshielded outdoor deployments. |
Use Scenario: Adding secondary-side surge resilience to USB-C PD and AC/DC adapters used in laptops and monitors exposed to mains-borne transients. IC Role / Device Role: Final-stage protector between secondary rectifier output and output capacitor, clamping output rail spikes caused by primary-side MOSFET switching noise or input surges. Use Value: Prevents overvoltage shutdown or capacitor degradation in 5–20 V output rails by limiting transient excursions to <54 V, even under full-load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | Lower PPPM (600 W), higher VC (58.1 V), same SMC-equivalent SMB package (DO-214AA). | Rated for lighter-duty consumer electronics; insufficient for automotive load dump or industrial 4 kV surge tests. | Select when cost sensitivity outweighs peak power requirement and board space allows larger footprint than SMB. |
| 1.5KE39CA | Through-hole TO-218 package, identical VWM/VBR/VC, but lower thermal efficiency (RθJA ≈ 100 °C/W) and no AEC-Q101 qualification. | Limited to non-automotive, non-automated production; unsuitable for high-volume SMT lines or under-hood environments. | Choose only for legacy through-hole designs or prototyping where reflow compatibility and automotive qualification are not required. |
Compared with SMBJ36CA and 1.5KE39CA, the 1.5SMC39CAHE3_A/H delivers superior surge robustness (1500 W vs. 600 W or equivalent), AEC-Q101 validation for automotive use, and optimized SMC packaging for automated manufacturing - making it the preferred choice for new designs targeting IEC/ISO-compliant reliability in harsh environments.
Availability
1.5SMC39CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface boards requiring stable component supply, AEC-Q101 qualification, and consistent 1500 W surge handling across production batches.
Supply support for 1.5SMC39CAHE3_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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on high-reliability, high-efficiency solutions.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in automotive, industrial, and telecom systems where compact size, repeatable clamping, and AEC-Q101 compliance are mandatory design requirements.
FAQ
What does the "CA" suffix indicate in 1.5SMC39CAHE3_A/H?
The "CA" suffix in 1.5SMC39CAHE3_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"), it has no polarity marking and functions identically regardless of terminal orientation, making it ideal for AC-coupled or floating signal paths such as Ethernet pairs or differential sensor outputs. This is confirmed in Vishay's 1.5SMC datasheet revision 09-Mar-2026, section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is 1.5SMC39CAHE3_A/H qualified for automotive applications?
Yes, 1.5SMC39CAHE3_A/H is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (Document Number: 88303, Revision: 09-Mar-2026) under "FEATURES" and "ORDERING INFORMATION". The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification, validated for temperature cycling, high-temperature reverse bias (HTRB), and ESD robustness - meeting requirements for engine control units, ADAS sensors, and body electronics where zero-field-failure reliability is mandated.
What is the maximum clamping voltage of 1.5SMC39CAHE3_A/H at rated peak pulse current?
The maximum clamping voltage (VC) of 1.5SMC39CAHE3_A/H is 53.9 V at 27.8 A peak pulse current (IPPM) with a 10/1000 μs waveform, per the "ELECTRICAL CHARACTERISTICS" table in the official Vishay datasheet. This value represents the upper limit of voltage seen by protected circuitry during worst-case surge events and is critical for verifying compatibility with downstream IC absolute maximum ratings - for example, ensuring it remains below 58 V for 5 V logic families with 6 V tolerance.
How does the SMC (DO-214AB) package of 1.5SMC39CAHE3_A/H compare to SMB (DO-214AA)?
The SMC (DO-214AB) package used by 1.5SMC39CAHE3_A/H measures 7.75 mm × 6.22 mm × 2.62 mm and offers higher power dissipation versus SMB (DO-214AA), which is smaller (4.57 mm × 3.94 mm × 2.31 mm) and rated for ≤600 W. The larger SMC footprint enables better thermal spreading on PCB copper pads, contributing to the 1.5SMC39CAHE3_A/H's 1500 W rating and lower RθJA (75 °C/W vs. ~100 °C/W for SMB). Layout changes are required when substituting - SMC cannot be drop-in replaced with SMB without pad redesign.
Does 1.5SMC39CAHE3_A/H require orientation during PCB placement?
No, 1.5SMC39CAHE3_A/H does not require orientation during PCB placement because it is a bidirectional TVS diode with symmetrical terminals and no polarity marking - as specified in the "MECHANICAL DATA" section of the Vishay datasheet ("no marking on bidirectional types"). This eliminates orientation verification steps in automated SMT lines and reduces assembly error risk, unlike unidirectional variants (e.g., 1.5SMC39AHE3_A/H) that feature a cathode band and must be placed with correct polarity to function.
1.5SMC39CAHE3_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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 27.8A
- 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)
1.5SMC39CAHE3_A/H FAQ
1.How can I place an order for 1.5SMC39CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39CAHE3_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 1.5SMC39CAHE3_A/H reliable?
The price and inventory of 1.5SMC39CAHE3_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 1.5SMC39CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC39CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39CAHE3_A/H?
1.5SMC39CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39CAHE3_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 1.5SMC39CAHE3_A/H?
For technical support, including 1.5SMC39CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39CAHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC39CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39CAHE3_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 1.5SMC39CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC39CAHE3_A/H?
All 1.5SMC39CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39CAHE3_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 1.5SMC39CAHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC39CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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