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Vishay General Semiconductor - Diodes Division P6SMB39CAHM3_B/I
- Part No.:
- P6SMB39CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB39CAHM3_B/I.pdf
- Description:
- 600W,39V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,244
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Product details
Overview
P6SMB39CAHM3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for clamping voltage transients on signal or power lines. It features a 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR) at 1 mA test current, 53.9 V maximum clamping voltage at 11.1 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive-grade protection circuits for sensor interfaces and power rails.
For engineers reviewing the P6SMB39CAHM3_B/I datasheet, P6SMB39CAHM3_B/I pinout, P6SMB39CAHM3_B/I application, or P6SMB39CAHM3_B/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, SMB (DO-214AA) package thermal performance, and compliance with IEC 61000-4-2/4-4/4-5 surge immunity requirements in harsh automotive environments.
Technical Context
This device operates as a voltage-clamping protector with symmetrical reverse/forward conduction behavior due to its bidirectional architecture. Its glass-passivated junction enables fast response time (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 μs transients at 0.01% duty cycle.
Thermally, it exhibits RθJA = 100 °C/W and RθJL = 20 °C/W, supporting operation up to TJ = +150 °C. The HM3 suffix confirms halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance and MSL Level 1 moisture sensitivity rating (peak reflow 260 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 33.3 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown) | 37.1–41.0 V at 1 mA - Voltage at which device transitions into avalanche conduction; ensures reliable turn-on during transients. |
| VC (Clamping) | 53.9 V at IPPM = 11.1 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines downstream component stress. |
| PPPM | 600 W - Peak transient energy absorption capacity per IEC 61000-4-5; supports robust protection against lightning-induced surges. |
| Package | SMB (DO-214AA) - Surface-mount outline with 0.220" × 0.130" footprint; optimized for automated placement and thermal dissipation on 5.0 mm × 5.0 mm copper pads. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units, ADAS sensors, and infotainment power rails. |
| Leakage (ID) | <1.0 μA at VWM - Minimal standby current draw; preserves battery life and avoids false triggering in low-power systems. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetric; both ends function identically under reverse or forward transient conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | Either end serves as input/output for transient suppression; no polarity dependency simplifies PCB layout and eliminates orientation errors. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 4 (4 kV) surges without cascaded TVS stages. |
| AEC-Q101 qualified (HM3_B/I) | Validated reliability for automotive underhood and cabin applications requiring extended temperature cycling and vibration endurance. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage exposure to downstream ICs such as CAN transceivers or microcontrollers during ESD events. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling protocols. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term parameter stability across 150 °C junction temperature range. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across sensor supply and ground pins to shunt transients before reaching ADC inputs or signal conditioning amplifiers. Use Value: Maintains sensor accuracy and prevents latch-up in 12 V/24 V automotive systems where VWM = 33.3 V provides sufficient margin above nominal rail. |
Use Scenario: Safeguarding high-speed CAN FD transceivers (e.g., TCAN1042) against ESD and coupled noise on differential bus lines in factory automation networks. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted directly at connector entry point to suppress ±25 kV contact ESD (IEC 61000-4-2) without distorting 5 Mbps data signals. Use Value: Clamping voltage of 53.9 V stays well below transceiver absolute maximum ratings while preserving signal integrity via minimal parasitic capacitance. |
| Telecom Power Rail Protection | Consumer USB-C Port Surge Guard |
|
Use Scenario: Securing 48 V DC power inputs of PoE-powered switches and base station radios against lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary-level TVS placed upstream of DC-DC converters to absorb bulk surge energy before secondary-stage protection devices engage. Use Value: 600 W PPPM rating allows single-device handling of 2 kV/1 kA surge waveforms, reducing BOM count and board space versus stacked TVS arrays. |
Use Scenario: Hardening USB-C receptacles in laptops and docking stations against hot-plug induced transients and user-handling ESD. IC Role / Device Role / Timing Role: Bidirectional clamp across VBUS and GND to prevent overvoltage damage to USB PD controllers and port power switches during insertion/removal. Use Value: Symmetric clamping ensures equal protection regardless of plug orientation; SMB package fits tight spacing constraints near Type-C connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Same SMB package, lower PPPM (400 W), higher VWM (33 V), slightly higher VC (53.3 V at 9.6 A) | Limited to less severe surge environments (e.g., consumer electronics); not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification or 600 W surge headroom. |
| 1.5KE39CA | Through-hole DO-201 package, same VWM/VC specs, 1500 W PPPM, higher thermal mass | Used in legacy industrial power supplies where manual assembly or higher surge margin is required | Choose only if through-hole mounting is mandated or >600 W surge handling is needed without parallel devices. |
Compared with SMAJ33CA and 1.5KE39CA, P6SMB39CAHM3_B/I uniquely combines AEC-Q101 qualification, 600 W surge rating, and SMB surface-mount compatibility - making it the optimal choice for new automotive and high-reliability industrial designs requiring validated production readiness and automated assembly support.
Availability
P6SMB39CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, telecom power inputs, and consumer USB-C port protection requiring stable component supply and full traceability.
Supply support for P6SMB39CAHM3_B/I 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 reliability and automotive-grade validation.
The P6SMB Series targets high-energy transient suppression in space-constrained applications, with design focus on AEC-Q101 compliance, low-profile SMB packaging, and consistent clamping performance across temperature and lifetime.
FAQ
What does the "CA" suffix indicate in P6SMB39CAHM3_B/I?
The "CA" suffix denotes a bidirectional configuration - meaning P6SMB39CAHM3_B/I provides symmetrical clamping in both polarities, unlike unidirectional variants (e.g., P6SMB39AHM3_B/I). This eliminates polarity concerns during PCB layout and enables use on AC-coupled or differential signal lines such as CAN or RS-485 buses. The device has identical VWM, VBR, and VC values in either direction.
Is P6SMB39CAHM3_B/I suitable for IEC 61000-4-2 ESD protection?
Yes, P6SMB39CAHM3_B/I is rated for ±25 kV air discharge and ±15 kV contact discharge per IEC 61000-4-2, verified by its fast response time (<1 ns) and low clamping voltage (53.9 V). Its bidirectional behavior ensures consistent protection regardless of ESD polarity, and the SMB package allows placement directly at I/O connectors - critical for maintaining system-level ESD immunity in automotive and industrial equipment.
How does the HM3_B/I suffix affect the specifications of P6SMB39CAHM3_B/I?
The HM3_B/I suffix indicates halogen-free, RoHS-compliant construction (HM3), AEC-Q101 qualification (_B), and 13-inch tape-and-reel packaging with 3200 units per reel (_I). These do not alter electrical parameters but confirm compliance with automotive environmental standards, whisker resistance (JESD201 Class 2), and moisture sensitivity level (MSL Level 1). All core TVS specs - VWM, VBR, VC, PPPM - remain identical to non-HM3 variants.
What is the maximum operating temperature for P6SMB39CAHM3_B/I?
P6SMB39CAHM3_B/I has a specified operating junction temperature range of –65 °C to +150 °C. At ambient temperatures up to +85 °C, derating curves (Fig. 2 in datasheet 88370) show usable power dissipation remains above 3.5 W. Its RθJA = 100 °C/W and RθJL = 20 °C/W enable reliable thermal performance in sealed enclosures or under hood locations when mounted on recommended 5.0 mm × 5.0 mm copper pads.
Can P6SMB39CAHM3_B/I replace P6SMB39A in an existing design?
No - P6SMB39CAHM3_B/I is bidirectional while P6SMB39A is unidirectional; substituting them requires verifying circuit polarity and clamping direction. Unidirectional P6SMB39A uses a cathode band for orientation and conducts only in reverse bias, whereas P6SMB39CAHM3_B/I clamps equally in both directions. Layout changes may be needed to accommodate the absence of polarity marking and ensure proper grounding strategy for bidirectional operation.
P6SMB39CAHM3_B/I 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:
- 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):
- 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_B/I FAQ
1.How can I place an order for P6SMB39CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB39CAHM3_B/I 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_B/I reliable?
The price and inventory of P6SMB39CAHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB39CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB39CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB39CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB39CAHM3_B/I?
P6SMB39CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB39CAHM3_B/I 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_B/I?
For technical support, including P6SMB39CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB39CAHM3_B/I requirements.
6.How does Aetrix verify that P6SMB39CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB39CAHM3_B/I 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_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB39CAHM3_B/I?
All P6SMB39CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB39CAHM3_B/I, 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_B/I part is unused and in its original packaging.
Return procedure for P6SMB39CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB39CAHM3_B/I Tags
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