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Vishay General Semiconductor - Diodes Division P6SMB43CAHM3_B/H
- Part No.:
- P6SMB43CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB43CAHM3_B/H.pdf
- Description:
- 600W,43V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,752
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Product details
Overview
P6SMB43CAHM3_B/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 36.8 V standoff voltage (VWM), 40.9–45.2 V breakdown voltage (VBR) at 1 mA, 59.3 V maximum clamping voltage (VC) at 10.1 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the P6SMB43CAHM3_B/H datasheet, P6SMB43CAHM3_B/H pinout, P6SMB43CAHM3_B/H application, or P6SMB43CAHM3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT placement on PCBs requiring robust ESD and surge immunity per IEC 61000-4-2/4-5.
Technical Context
This device operates as a voltage-clamping protector in bidirectional mode, responding within picoseconds to transient overvoltages induced by inductive switching or lightning surges. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 µA at VWM), while the SMB package supports high surge current handling without thermal runaway under repetitive 0.01% duty cycle conditions.
The P6SMB43CAHM3_B/H is rated for continuous operation up to 150 °C junction temperature and exhibits a positive temperature coefficient of VBR (+0.101 %/°C), enabling predictable voltage margining across automotive temperature ranges. Its MSL Level 1 rating and matte tin-plated leads meet J-STD-002 solderability requirements for lead-free reflow profiles peaking at 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 36.8 V - Maximum continuous reverse operating voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 40.9–45.2 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering during fast transients without premature conduction. |
| VC (Clamping Voltage) | 59.3 V at 10.1 A IPPM - Peak voltage seen by protected circuit during 10/1000 µs surge; determines downstream component stress level. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capacity under standardized surge waveform; validates suitability for IEC 61000-4-5 Level 3/4 protection. |
| TJ max. | 150 °C - Maximum junction temperature; enables deployment in under-hood automotive environments and industrial enclosures without derating. |
| RθJL | 20 °C/W - Low junction-to-lead thermal resistance; facilitates efficient heat transfer to PCB copper pads without heatsinks. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements including HTOL, TC, and ESD; suffix HM3_B denotes halogen-free, RoHS-compliant AEC-Q101 grade. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); molded compound meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Conducts surge current in either direction; connects to line being protected (e.g., CAN_H or RS-485 A). |
| Cathode | Transient current exit point (bidirectional) | Completes low-impedance path to ground or return rail during clamping; requires low-inductance PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables symmetric protection on AC-coupled or differential lines (e.g., USB D+/D−, RS-485) without polarity concerns. |
| 600 W peak pulse power | Withstands repeated 10/1000 µs surges up to 10.1 A - sufficient for IEC 61000-4-5 4 kV line-to-ground tests. |
| AEC-Q101 qualified (HM3_B) | Validated for automotive-grade reliability including temperature cycling, high-temperature operating life, and ESD robustness. |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow profiles; eliminates moisture sensitivity handling requirements. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declarations; supports green manufacturing programs. |
Applications
| Automotive Sensor Interface Protection | Industrial RS-485 Communication Line |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and microcontroller ADC input to limit transient excursions. Use Value: Maintains signal integrity below 59.3 V clamping threshold during 100 V/50 ms load dump events, preventing ADC saturation or latch-up. |
Use Scenario: Safeguarding differential data lines in factory automation PLCs connected to long cable runs susceptible to EFT and lightning-induced surges. IC Role / Device Role / Timing Role: TVS pair (one per line) referenced to common-mode ground, absorbing common-mode transients on RS-485 bus. Use Value: Clamps 4 kV EFT bursts per IEC 61000-4-4 to <60 V, preserving data integrity and avoiding transceiver damage without adding propagation delay. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Secondary-level ESD protection on USB 2.0 upstream ports in set-top boxes subjected to ±8 kV contact discharge per IEC 61000-4-2. IC Role / Device Role / Timing Role: Bidirectional TVS placed across D+ and D− lines to shunt ESD current away from USB PHY IC. Use Value: Sub-1 ns response time limits voltage overshoot to ≤59.3 V, meeting USB IF eye diagram mask requirements after ESD event. |
Use Scenario: Primary surge protection on DSL line interface cards in central office equipment facing induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Front-end clamping device on tip/ring lines before transformer coupling and line driver ICs. Use Value: Absorbs 600 W peak energy from 10/1000 µs surges, limiting voltage to <60 V at line driver inputs and extending system MTBF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43CA | Same VWM/VC, but 400 W PPPM rating and SMA package (higher RθJA = 140 °C/W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 due to reduced power handling | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 only. |
| 1.5SMC43CA | Same electrical specs, but larger SMC (DO-214AB) package with higher thermal mass and RθJL = 10 °C/W | Better thermal performance but requires 30% more PCB area; not optimized for high-density automotive modules | Choose for industrial power supplies where layout density is less critical than long-term thermal stability. |
Compared with SMAJ43CA and 1.5SMC43CA, the P6SMB43CAHM3_B/H delivers optimal balance of 600 W surge capability, AEC-Q101 qualification, and compact SMB footprint - making it preferred for space-constrained automotive and industrial designs requiring certified reliability and high-energy transient immunity.
Availability
P6SMB43CAHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial communication interfaces, consumer USB protection, and telecom line card designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P6SMB43CAHM3_B/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 application-specific optimization.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and communications systems - engineered for robust surge handling, AEC-Q101 compliance, and seamless integration into automated SMT assembly lines.
FAQ
What does the "CA" suffix indicate in P6SMB43CAHM3_B/H?
The "CA" suffix in P6SMB43CAHM3_B/H designates a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., P6SMB43A), this device clamps voltage transients equally in both directions - essential for protecting AC-coupled or differential signal lines such as RS-485, CAN, or USB without polarity constraints. The P6SMB43CAHM3_B/H has no cathode band marking, confirming its symmetrical construction.
Is P6SMB43CAHM3_B/H suitable for automotive applications?
Yes, P6SMB43CAHM3_B/H is explicitly AEC-Q101 qualified, as confirmed by the "HM3_B" suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It undergoes stress testing for high-temperature operating life, temperature cycling, and ESD robustness - making it appropriate for engine control units, body electronics, and ADAS sensor interfaces where reliability under harsh conditions is mandatory.
What is the maximum clamping voltage of P6SMB43CAHM3_B/H and how is it measured?
The maximum clamping voltage of P6SMB43CAHM3_B/H is 59.3 V, measured at a peak pulse current (IPPM) of 10.1 A using the standardized 10/1000 µs double-exponential waveform per IEC 61000-4-5. This value represents the highest voltage imposed on the protected circuit during worst-case surge conditions and is validated at TA = 25 °C with specified PCB pad layout (0.2″ × 0.2″ copper per terminal).
How does the SMB package of P6SMB43CAHM3_B/H compare to SMA or SMC alternatives?
The SMB (DO-214AA) package of P6SMB43CAHM3_B/H offers a 30% smaller footprint than SMC (DO-214AB) and 15% smaller than SMA (DO-214AC), while maintaining 600 W peak pulse power. Its RθJL of 20 °C/W enables effective heat dissipation into PCB copper, unlike SMA's higher thermal resistance. This makes P6SMB43CAHM3_B/H ideal for dense automotive modules where space and thermal performance are both critical.
Does P6SMB43CAHM3_B/H require external series impedance for optimal protection?
No, P6SMB43CAHM3_B/H functions as a standalone clamping device and does not require external series impedance to operate. However, for high-speed data lines (e.g., USB, CAN), a small series resistor (e.g., 0–33 Ω) may be added to dampen ringing caused by PCB trace inductance interacting with the device's junction capacitance (~200 pF at 0 V). The P6SMB43CAHM3_B/H itself provides full transient suppression without auxiliary components.
P6SMB43CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 10.1A
- 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)
P6SMB43CAHM3_B/H FAQ
1.How can I place an order for P6SMB43CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB43CAHM3_B/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 P6SMB43CAHM3_B/H reliable?
The price and inventory of P6SMB43CAHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB43CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for P6SMB43CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB43CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB43CAHM3_B/H?
P6SMB43CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB43CAHM3_B/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 P6SMB43CAHM3_B/H?
For technical support, including P6SMB43CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB43CAHM3_B/H requirements.
6.How does Aetrix verify that P6SMB43CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All P6SMB43CAHM3_B/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 P6SMB43CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of P6SMB43CAHM3_B/H?
All P6SMB43CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB43CAHM3_B/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 P6SMB43CAHM3_B/H part is unused and in its original packaging.
Return procedure for P6SMB43CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB43CAHM3_B/H Tags
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