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Vishay General Semiconductor - Diodes Division P6SMB39CAHM3/H
- Part No.:
- P6SMB39CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB39CAHM3/H.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB39CAHM3/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 11.1 A peak pulse current, and 600 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 P6SMB39CAHM3/H datasheet, P6SMB39CAHM3/H pinout, P6SMB39CAHM3/H application, or P6SMB39CAHM3/H equivalent, this device delivers AEC-Q101 qualified transient suppression in SMB (DO-214AA) package with halogen-free, RoHS-compliant construction and MSL Level 1 moisture sensitivity - critical for high-reliability automotive and industrial PCB designs requiring validated surge immunity.
Technical Context
The P6SMB39CAHM3/H operates as a bidirectional avalanche diode, symmetrically clamping voltage transients above ±37.1 V in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance under repetitive 10/1000 μs surges at 0.01% duty cycle.
Thermally, it supports operation from −65 °C to +150 °C junction temperature, with RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling reliable performance on standard 0.2" × 0.2" copper pads without heatsinking for short-duration transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 33.3 V - Maximum continuous reverse voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 37.1–41.0 V at 1 mA - Verified avalanche onset range; ensures predictable turn-on during fast transients. |
| VC (Clamping) | 53.9 V at 11.1 A - Peak voltage seen by protected circuit during 10/1000 μs surge; limits stress on downstream ICs. |
| PPPM | 600 W - Sustains 10/1000 μs surge energy up to 600 W without failure; meets IEC 61000-4-5 Level 4 requirements. |
| IPPM | 11.1 A - Peak pulse current capability at rated clamping voltage; determines minimum trace width and layout robustness. |
| TJ max. | +150 °C - Maximum junction temperature rating; enables use in under-hood automotive and high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Low-profile surface-mount outline (4.57 × 3.94 × 2.20 mm); compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to protected line; conducts during negative-going transients relative to cathode reference. |
| Cathode | Transient return path (bidirectional) | Connects to protected line; conducts during positive-going transients relative to anode reference. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for industrial and consumer electronics without compromising surge performance. |
| 600 W peak pulse power | Handles high-energy transients from inductive switching (e.g., solenoid drivers) without degradation over 1000+ cycles. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles; eliminates pre-bake requirement for production assembly. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns), improving protection fidelity for high-speed interfaces. |
Applications
| Automotive Sensor Protection | Industrial I/O Module Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching interface ICs. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-2 ±15 kV contact discharge while preserving low capacitance. |
Use Scenario: Safeguarding 24 V DC input terminals and RS-485/RS-232 signal lines in programmable logic controllers (PLCs) and motor drives. IC Role / Device Role / Timing Role: Primary front-end TVS for field-side surge immunity, coordinated with gas discharge tubes or MOVs in multi-stage protection schemes. Use Value: Limits clamped voltage to ≤53.9 V during 1 kV/500 A ring wave (IEC 61000-4-5), preventing latch-up in isolated power supplies and communication ICs. |
| Telecom Line Interface | Consumer Power Adapter Input |
|
Use Scenario: Shielding Ethernet PHYs and PoE injectors from lightning-induced surges on twisted-pair data lines in outdoor access points. IC Role / Device Role / Timing Role: Secondary-level TVS after primary GDT/MOV stage; handles residual fast transients with sub-nanosecond response. Use Value: Achieves <1 ns response time and <54 V clamping to protect 100BASE-TX transformers and magnetics rated for 60 V isolation. |
Use Scenario: Suppressing switch-mode power supply (SMPS) turn-off spikes and ESD on AC-DC adapter input rectifier outputs. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor to clamp voltage overshoot during MOSFET commutation. Use Value: Withstands 600 W pulses without parametric shift, extending capacitor life and reducing audible noise from voltage ringing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA | Lower PPPM (400 W), higher VC (58.1 V at 6.9 A), SMA package (smaller footprint but lower thermal mass). | Limited to lower-energy transients; less suitable for automotive load dump where 600 W margin is required. | Select when board space is constrained and surge energy is ≤400 W (e.g., USB port protection). |
| 1.5KE39CA | Higher power (1500 W), axial-leaded DO-201 package, slower thermal response, not surface-mount. | Requires through-hole assembly and larger PCB area; incompatible with automated SMT lines. | Choose only for legacy through-hole designs or prototyping where manual soldering is acceptable. |
Compared with SMAJ36CA and 1.5KE39CA, P6SMB39CAHM3/H uniquely balances 600 W surge handling, AEC-Q101 qualification, SMB surface-mount compatibility, and halogen-free compliance - making it the optimal choice for volume automotive and industrial SMT production where reliability, manufacturability, and regulatory alignment are jointly critical.
Availability
P6SMB39CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O modules, telecom line protection, and consumer power adapter designs requiring stable component supply, long-term lifecycle support, and AEC-Q101 validation.
Supply support for P6SMB39CAHM3/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 and automotive-grade solutions.
The P6SMB Series targets high-energy transient suppression in compact surface-mount form, engineered specifically for automotive, industrial, and telecom systems demanding AEC-Q101 qualification and consistent 600 W surge performance.
FAQ
What is the clamping voltage of P6SMB39CAHM3/H at its rated peak pulse current?
The P6SMB39CAHM3/H has a maximum clamping voltage (VC) of 53.9 V at 11.1 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per JEDEC standards and guarantees that protected circuits experience no more than 53.9 V during worst-case surge events - a critical parameter for ensuring compatibility with 3.3 V, 5 V, and 24 V logic and interface ICs. The P6SMB39CAHM3/H maintains this clamping performance across its full operating temperature range.
Is P6SMB39CAHM3/H suitable for automotive applications?
Yes, P6SMB39CAHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" (halogen-free, RoHS-compliant, AEC-Q101 qualified). It is explicitly rated for automotive environments including under-hood and chassis-mounted modules, supporting operation from −65 °C to +150 °C junction temperature and passing stress tests for temperature cycling, humidity, and mechanical shock. The P6SMB39CAHM3/H is commonly used in automotive sensor units, body control modules, and infotainment power rails.
What does the "CA" suffix indicate in P6SMB39CAHM3/H?
The "CA" suffix in P6SMB39CAHM3/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions, with identical electrical characteristics in either polarity. Unlike unidirectional variants (e.g., P6SMB39A), the P6SMB39CAHM3/H has no cathode band marking and is installed without orientation constraints, simplifying layout and assembly for AC-coupled or differential signal lines.
What is the thermal resistance of P6SMB39CAHM3/H, and how does it affect layout?
P6SMB39CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W, measured on 0.2" × 0.2" copper pads per terminal. These values mean that sustained power dissipation above ~500 mW requires careful thermal design - though the device is intended for transient (not continuous) operation. For optimal surge endurance, PCB layout must follow Vishay's recommended pad dimensions (minimum 0.086" × 0.060") to maintain specified RθJA and avoid derating of P6SMB39CAHM3/H's 600 W rating.
How does P6SMB39CAHM3/H compare to unidirectional P6SMB39AHM3/H in circuit implementation?
P6SMB39CAHM3/H differs from P6SMB39AHM3/H in polarity behavior: the "CA" version is bidirectional and mounts without orientation, while the "A" version is unidirectional and requires correct cathode alignment toward the protected circuit's ground reference. In practice, P6SMB39CAHM3/H is preferred for AC lines, differential buses (e.g., RS-485), or any application where voltage polarity reversal is possible. The P6SMB39CAHM3/H also exhibits identical VWM, VBR, and VC in both directions, whereas P6SMB39AHM3/H only clamps in reverse bias and conducts forward like a standard diode.
P6SMB39CAHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, 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):
- 11.1A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
P6SMB39CAHM3/H FAQ
1.How can I place an order for P6SMB39CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB39CAHM3/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 P6SMB39CAHM3/H reliable?
The price and inventory of P6SMB39CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB39CAHM3/H is usually 5 days.
3.What payment methods are accepted for P6SMB39CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB39CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB39CAHM3/H?
P6SMB39CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB39CAHM3/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 P6SMB39CAHM3/H?
For technical support, including P6SMB39CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB39CAHM3/H requirements.
6.How does Aetrix verify that P6SMB39CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P6SMB39CAHM3/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 P6SMB39CAHM3/H meets industry standards.
7.What is the process for return or replacement of P6SMB39CAHM3/H?
All P6SMB39CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB39CAHM3/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 P6SMB39CAHM3/H part is unused and in its original packaging.
Return procedure for P6SMB39CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB39CAHM3/H Tags
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