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Vishay General Semiconductor - Diodes Division 1.5SMC39CAHM3_A/H
- Part No.:
- 1.5SMC39CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39CAHM3_A/H.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,357
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Product details
Overview
1.5SMC39CAHM3_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 clamping voltage (VC) at 27.8 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC39CAHM3_A/H datasheet, 1.5SMC39CAHM3_A/H pinout, 1.5SMC39CAHM3_A/H application, or 1.5SMC39CAHM3_A/H equivalent, this device delivers AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive and industrial designs requiring validated transient immunity without layout redesign.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling suppression of positive and negative transients without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance and fast response time (<1 ns), while the SMC (DO-214AB) package supports automated placement and meets UL 94 V-0 flammability rating.
The device is rated for -65 °C to +150 °C operating junction temperature, derates linearly above 25 °C per Fig. 2, and exhibits 0.100 %/°C temperature coefficient of VBR - ensuring predictable clamping behavior across thermal extremes in engine control units and motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 33.3 V - maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (Breakdown) | 37.1–41.0 V at 1 mA - precise voltage range where avalanche conduction initiates; tight 10 % tolerance enables accurate system-level surge margining |
| VC (Clamping) | 53.9 V at 27.8 A - maximum voltage seen by protected circuit during 10/1000 μs surge; determines downstream IC survivability |
| PPPM | 1500 W - peak transient energy handling capacity under standardized 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 compliance |
| IR (Leakage) | <1.0 μA at VWM - negligible standby current; avoids signal integrity degradation or battery drain in always-on circuits |
| TJ max. | +150 °C - extended junction temperature rating enables use in under-hood automotive environments and high-power industrial enclosures |
| MSL Level | Level 1 (per J-STD-020) - unrestricted floor life and reflow compatibility up to 260 °C peak; eliminates bake requirements for SMT assembly |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Conducts during negative-going surges; symmetrical with cathode for bidirectional operation |
| Cathode | Transient current entry (positive polarity) | Conducts during positive-going surges; forms matched pair with anode for full-cycle clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for ADAS sensors and body control modules |
| 1500 W peak pulse power | Withstands 10/1000 μs surges up to 27.8 A - exceeds IEC 61000-4-5 Line-to-Line (2 Ω source) requirements for industrial fieldbus ports |
| Glass passivated junction | Ensures stable VBR over lifetime and temperature; eliminates parameter drift in high-humidity or thermally cycled environments |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream MOSFETs or microcontrollers - critical for 3.3 V/5 V logic rail protection |
| MSL Level 1 | Enables direct placement into high-volume SMT lines without dry-pack or baking - reduces manufacturing cost and cycle time |
Applications
| Automotive Sensor Protection | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and Hall-effect sensor outputs from load-dump and ISO 7637-2 pulses in engine compartments. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector interface to shunt transients before reaching signal conditioning ICs. Use Value: Maintains signal integrity under ±100 V/50 ms load dump events while surviving 150 °C ambient - validated per AEC-Q101 stress profiles. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to lightning-induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series current-limiting resistor and filtering capacitor. Use Value: Limits transient voltage to ≤53.9 V during 1 kV/0.5 J surges - preventing op-amp saturation and ADC latch-up in precision measurement stages. |
| Telecom Line Interface | Consumer Power Adapter ESD |
Use Scenario: Front-end protection for Ethernet PHYs and DSL line drivers subjected to induced surges from nearby AC mains or antenna coupling. IC Role / Device Role / Timing Role: Fast-response TVS placed before common-mode chokes and transformer isolation to absorb differential-mode transients. Use Value: Sub-1 ns response ensures clamping activation prior to IC damage threshold - verified with TLP testing per IEC 61000-4-2. |
Use Scenario: Secondary-side surge suppression on USB-C PD and Qi wireless charging adapter outputs against user-handling ESD and cable coupling events. IC Role / Device Role / Timing Role: Final-stage protector after DC-DC regulation, guarding downstream USB port controllers and battery management ICs. Use Value: 1.0 μA leakage at 33.3 V prevents standby current accumulation in always-connected devices - critical for Energy Star compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | Lower PPPM (600 W), smaller SMB package (DO-214AA), 36 V VWM, 58.1 V VC at 10.3 A | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load-dump or industrial 4–20 mA loops | Select when board space is constrained and surge threat level is moderate (e.g., consumer USB peripherals) |
| 1.5KE39CA | Through-hole TO-204AE (DO-41), same VWM/VC specs but higher RθJA (100 °C/W vs. 75 °C/W), no AEC-Q101 qualification | Requires manual insertion or wave soldering; not approved for automotive electronics or automated high-volume production | 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 1.5SMC39CAHM3_A/H provides superior surge handling (1500 W), AEC-Q101 validation, and SMT-ready MSL Level 1 packaging - making it the optimal choice for new automotive, industrial, and telecom designs demanding production scalability and long-term reliability.
Availability
1.5SMC39CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and telecom line interface circuits requiring stable component supply, AEC-Q101 traceability, and halogen-free compliance.
Supply support for 1.5SMC39CAHM3_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, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The 1.5SMC Series was engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated without compromising size or manufacturability.
FAQ
What is the clamping voltage of the 1.5SMC39CAHM3_A/H under a 10/1000 μs surge?
The 1.5SMC39CAHM3_A/H has a maximum clamping voltage (VC) of 53.9 V at 27.8 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs like microcontrollers or transceivers remain within absolute maximum ratings.
Is the 1.5SMC39CAHM3_A/H suitable for automotive applications?
Yes, the 1.5SMC39CAHM3_A/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is explicitly rated for operation from -65 °C to +150 °C and validated for thermal cycling, highly accelerated life testing, and ESD - making it appropriate for engine control units, ADAS sensors, and body electronics per ISO 16750 and ISO 7637-2 requirements.
What does the "CA" suffix mean in 1.5SMC39CAHM3_A/H?
The "CA" suffix in 1.5SMC39CAHM3_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., 1.5SMC39AHM3_A/H), it has no polarity marking and functions identically regardless of applied voltage polarity, simplifying layout for AC-coupled or differential signal lines.
What is the standoff voltage (VWM) of the 1.5SMC39CAHM3_A/H?
The standoff voltage (VWM) of the 1.5SMC39CAHM3_A/H is 33.3 V - the maximum DC or RMS voltage that can be continuously applied without triggering significant leakage current (<1.0 μA). This parameter establishes the design margin between normal operating voltage and the onset of avalanche conduction, ensuring reliable operation in 24 V automotive and 36 V industrial systems.
Does the 1.5SMC39CAHM3_A/H require special PCB layout considerations?
No special layout is required beyond Vishay's recommended SMC (DO-214AB) pad dimensions: 0.31" x 0.31" (8.0 mm x 8.0 mm) copper pads per terminal. The 1.5SMC39CAHM3_A/H benefits from short, low-inductance traces to the protected node and ground plane, but its low incremental surge resistance and symmetrical structure eliminate need for balancing components or directional routing - unlike unidirectional TVS diodes.
1.5SMC39CAHM3_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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC39CAHM3_A/H FAQ
1.How can I place an order for 1.5SMC39CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39CAHM3_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 1.5SMC39CAHM3_A/H reliable?
The price and inventory of 1.5SMC39CAHM3_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 1.5SMC39CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC39CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39CAHM3_A/H?
1.5SMC39CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39CAHM3_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 1.5SMC39CAHM3_A/H?
For technical support, including 1.5SMC39CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39CAHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC39CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39CAHM3_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 1.5SMC39CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC39CAHM3_A/H?
All 1.5SMC39CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39CAHM3_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 1.5SMC39CAHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC39CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC39CAHM3_A/H Tags
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