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Vishay General Semiconductor - Diodes Division 1.5SMC39CAHM3/H
- Part No.:
- 1.5SMC39CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39CAHM3/H.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,875
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Product details
Overview
1.5SMC39CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection. It features 39 V standoff voltage (VWM), 43.3–47.8 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 μs), clamping voltage of 53.9 V at 27.8 A, and operates from –65 °C to +150 °C - deployed in automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the 1.5SMC39CAHM3/H datasheet, 1.5SMC39CAHM3/H pinout, 1.5SMC39CAHM3/H application, or 1.5SMC39CAHM3/H equivalent, key selection criteria include bidirectional clamping performance, AEC-Q101 qualification status, SMC package thermal resistance (RθJL = 15 °C/W), and compliance with UL 497B for telecom and automotive transient protection.
Technical Context
This device uses a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of ESD, lightning-induced transients, and inductive switching spikes. Its bidirectional architecture ensures symmetrical clamping in both polarities without polarity marking.
The 1.5SMC39CAHM3/H is rated for 1500 W peak pulse power under 10/1000 μs waveform with 0.01% duty cycle, derated above 25 °C per Fig. 2, and supports repetitive surge events when mounted on 8.0 mm × 8.0 mm copper pads per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 33.3 V - maximum continuous reverse voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown) | 37.1–41.0 V at 1 mA - guaranteed conduction onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping) | 53.9 V at 27.8 A - peak voltage seen by protected circuit during 1500 W transient; critical for IC-level survivability. |
| PPPM | 1500 W - peak pulse power handling with 10/1000 μs waveform; enables robust protection against lightning surges. |
| TJ max. | +150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated placement. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical PN junction; accepts reverse surge current during negative transients. |
| Cathode | Transient current entry (positive polarity) | Second terminal of symmetrical PN junction; accepts reverse surge current during positive transients. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on 50 Ω line impedance. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules and ADAS sensor interfaces. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD >15 kV contact discharge). |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking or special handling. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pair or supply rail to clamp transients before they reach PHY layer. Use Value: Maintains signal integrity under 100 V/100 ms load dump events while preserving <10 pF capacitance for high-speed bus timing. |
Use Scenario: Shielding 24 V DC digital input modules from inductive kickback in factory automation systems. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between field input and controller ground to shunt relay coil energy. Use Value: Prevents false triggering and latch-up in microcontroller GPIOs during 1 A/50 ms inductive switch-offs. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHY magnetics and PoE injectors against lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bidirectional TVS installed on primary side of isolation barrier to absorb 6 kV/3 A surge per ITU-T K.21. Use Value: Limits induced voltage to <60 V across transformer windings, preventing insulation breakdown and data corruption. |
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters exposed to mains transients. IC Role / Device Role / Timing Role: Clamping diode placed between output rail and ground to protect synchronous rectifier MOSFETs and controller ICs. Use Value: Absorbs 1500 W surges without degradation, ensuring sustained 5 V/3 A output compliance after repeated 1.2/50 μs 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 |
|---|---|---|---|
| SMBJ39CA | Lower peak power (600 W), same VWM/VBR range, SMB package (smaller footprint, higher RθJA = 100 °C/W) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load dump. | Select when board space is constrained and surge threat level is ≤600 W. |
| 1.5KE39CA | Through-hole DO-201 package, identical electrical specs but slower thermal response and no AEC-Q101 qualification | Not suitable for automated SMT production or automotive under-hood use due to mechanical and qualification gaps. | Choose only for legacy through-hole designs where rework tolerance and manual assembly are acceptable. |
Compared with SMBJ39CA and 1.5KE39CA, the 1.5SMC39CAHM3/H delivers higher surge robustness in an AEC-Q101-qualified SMT package, enabling direct integration into automotive and industrial PCBs without layout redesign or derating penalties.
Availability
1.5SMC39CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interfaces, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC39CAHM3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The 1.5SMC Series was developed specifically for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and 1500 W surge immunity are mandatory.
FAQ
What does the "HM3" suffix indicate in 1.5SMC39CAHM3/H?
The HM3 suffix in 1.5SMC39CAHM3/H denotes halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. It confirms compliance with JESD201 Class 2 whisker resistance, MSL Level 1 reflow capability (260 °C peak), and automotive reliability testing including HTGB and temperature cycling - distinguishing it from commercial-grade M3 or E3 variants.
Is 1.5SMC39CAHM3/H suitable for protecting RS-485 communication lines?
Yes, 1.5SMC39CAHM3/H is appropriate for RS-485 bus protection due to its bidirectional clamping, 33.3 V standoff voltage (compatible with ±12 V common-mode range), and low clamping voltage (53.9 V) that stays within the absolute maximum ratings of most RS-485 transceivers. Its <10 pF junction capacitance avoids signal integrity degradation at up to 20 Mbps.
How does the 1.5SMC39CAHM3/H compare to unidirectional versions like 1.5SMC39AHM3/H?
The 1.5SMC39CAHM3/H is bidirectional, providing symmetrical clamping for AC-coupled or floating signals, whereas 1.5SMC39AHM3/H is unidirectional with cathode marking and optimized for DC rail protection. Both share identical VWM (33.3 V), VBR (37.1–41.0 V), and PPPM (1500 W), but only the CA version supports dual-polarity surge suppression without external polarity management.
What is the maximum allowable mounting pad size for optimal thermal performance of 1.5SMC39CAHM3/H?
For rated 1500 W peak pulse power, 1.5SMC39CAHM3/H must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in Fig. 2 of the datasheet. Smaller pads reduce heat dissipation, causing premature thermal runaway during repetitive surges and violating the 1500 W rating.
Does 1.5SMC39CAHM3/H meet UL 497B certification requirements?
Yes, 1.5SMC39CAHM3/H carries Underwriters Laboratories recognition under file E136766 for both unidirectional and bidirectional configurations, complying with UL 497B for telecommunications primary protector classification. This certification validates its suitability for telecom line interface protection in North American infrastructure equipment.
1.5SMC39CAHM3/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:
- Discontinued at Digi-Key
- 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/H FAQ
1.How can I place an order for 1.5SMC39CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39CAHM3/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/H reliable?
The price and inventory of 1.5SMC39CAHM3/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/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC39CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39CAHM3/H?
1.5SMC39CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39CAHM3/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/H?
For technical support, including 1.5SMC39CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39CAHM3/H requirements.
6.How does Aetrix verify that 1.5SMC39CAHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39CAHM3/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/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC39CAHM3/H?
All 1.5SMC39CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39CAHM3/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/H part is unused and in its original packaging.
Return procedure for 1.5SMC39CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC39CAHM3/H Tags
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