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Vishay General Semiconductor - Diodes Division P6SMB36CAHM3_B/I
- Part No.:
- P6SMB36CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB36CAHM3_B/I.pdf
- Description:
- 600W,36V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,426
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Product details
Overview
P6SMB36CAHM3_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 36 V standoff voltage (VWM), 49.9 V maximum clamping voltage at 12 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the P6SMB36CAHM3_B/I datasheet, P6SMB36CAHM3_B/I pinout, P6SMB36CAHM3_B/I application, or P6SMB36CAHM3_B/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, SMB (DO-214AA) package thermal performance, and compliance with IEC 61000-4-2/4-5 transient immunity requirements.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable leakage (<1.0 μA at 30.8 V) and fast response time (<1.0 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The device is rated for 150 °C maximum junction temperature and exhibits a typical thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. Its MSL Level 1 rating and matte tin-plated leads support lead-free reflow assembly per J-STD-020 at 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30.8 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 34.2–37.8 V at 1.0 mA - Voltage at which device transitions from high-impedance to low-impedance clamping state; tightly controlled tolerance ensures predictable protection threshold. |
| VC (Clamping Voltage) | 49.9 V at 12.0 A IPPM - Maximum voltage seen by protected circuit during 10/1000 μs surge; critical for ensuring downstream ICs remain within absolute maximum ratings. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy handling capacity under standardized 10/1000 μs waveform; enables robust protection against IEC 61000-4-5 Level 3 surges. |
| ID (Reverse Leakage) | ≤1.0 μA at VWM - Minimal standby current draw; preserves signal integrity and battery life in always-on sensor or communication circuits. |
| TJ max. | 150 °C - Maximum junction temperature rating; supports operation in under-hood automotive and high-temperature industrial environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 0.220" × 0.130" footprint; optimized for automated placement and thermal dissipation via copper pad layout. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case meeting UL 94 V-0 flammability rating; terminals are matte tin-plated, 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 point (bidirectional) | Accepts surge current regardless of polarity; connects to protected line (e.g., CAN_H or RS-485 A). |
| Cathode | Transient current exit point (bidirectional) | Completes shunt path to ground or reference rail; symmetric with anode for bidirectional clamping. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces; supports extended temperature cycling and humidity testing. |
| 600 W peak pulse power (10/1000 μs) | Withstands repetitive surge events up to 0.01% duty cycle without degradation - suitable for industrial motor drive I/O protection. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on protected ICs; enables tighter design margins versus higher-ratio TVS devices. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT processes without preconditioning; eliminates moisture sensitivity handling overhead. |
| Glass passivated junction | Ensures long-term stability of leakage current and breakdown voltage across temperature and lifetime; reduces parameter drift in harsh environments. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting LIN/CAN bus nodes and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed between signal line and chassis ground to divert transients before reaching MCU or transceiver inputs. Use Value: Maintains signal integrity during ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-2 ±15 kV contact discharge events without latch-up or parametric shift. |
Use Scenario: Safeguarding differential data lines in factory automation PLCs and motor drives exposed to inductive switching noise. IC Role / Device Role / Timing Role: Common-mode transient suppressor across RS-485 A/B lines referenced to local ground, limiting common-mode voltage excursion. Use Value: Enables reliable 10 Mbps RS-485 communication in electrically noisy environments by clamping surges to <50 V while adding <0.5 pF capacitance. |
| Telecom Line Surge Suppression | Consumer USB Port ESD Protection |
Use Scenario: Front-end protection for DSL or PoE-powered Ethernet ports subjected to lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Primary-level TVS placed upstream of isolation transformers or PoE controllers to absorb bulk surge energy. Use Value: Handles IEC 61000-4-5 Level 3 (1 kV line-earth, 2 Ω source impedance) surges without failure, preserving downstream PHY IC reliability. |
Use Scenario: ESD hardening of USB 2.0 D+/D− lines in portable electronics such as tablets and docking stations. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp integrated into USB connector PCB footprint to shunt ±8 kV HBM ESD pulses. Use Value: Prevents interface lockup or damage during user-handling events while maintaining signal rise/fall times compliant with USB 2.0 timing specs. |
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 | Same VWM (36 V) and VC (49.9 V), but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA = 150 °C/W). | Limited to lower-energy transients; less suitable for IEC 61000-4-5 Level 3 or automotive load dump. | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 only. |
| SMCJ36CA | Higher PPPM (1500 W), same VWM/VC; larger SMC (DO-214AB) package with improved thermal performance (RθJA = 50 °C/W). | Better suited for high-reliability industrial power supply inputs or DC bus protection where sustained surge energy is greater. | Choose when system-level surge testing exceeds 600 W requirements or when ambient temperature exceeds 85 °C. |
Compared with SMAJ36CA and SMCJ36CA, P6SMB36CAHM3_B/I delivers balanced surge robustness (600 W), AEC-Q101 qualification, and SMB footprint - making it optimal for space-constrained automotive and industrial signal-line protection where moderate energy handling and automotive-grade reliability are jointly required.
Availability
P6SMB36CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom line surge suppression requiring stable component supply, AEC-Q101 traceability, and consistent SMB package form factor.
Supply support for P6SMB36CAHM3_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 supplier of discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and application-specific performance.
The P6SMB Series is engineered for high-energy transient suppression in automotive, industrial, and telecom systems - delivering standardized 600 W surge capability, AEC-Q101 variants, and consistent DO-214AA packaging across voltage grades.
FAQ
What does the "CA" suffix indicate in P6SMB36CAHM3_B/I?
The "CA" suffix denotes that P6SMB36CAHM3_B/I is a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., P6SMB36A), this device provides symmetrical clamping in both forward and reverse directions - essential for protecting AC-coupled or differential signal lines such as RS-485, CAN, or telecom interfaces where polarity is undefined or alternating.
Is P6SMB36CAHM3_B/I AEC-Q101 qualified, and what does the "_B/I" suffix signify?
Yes, P6SMB36CAHM3_B/I is AEC-Q101 qualified. The "_B" indicates AEC-Q101 qualification for the P6SMB6.8(C)A to P6SMB220(C)A voltage range, and "_I" specifies 13-inch tape-and-reel packaging with 3200 units per reel - confirmed in Vishay's ordering information table for P6SMB36AHE3_B/I and P6SMB36AHM3_B/I variants.
How does the clamping voltage of P6SMB36CAHM3_B/I compare to its breakdown voltage?
P6SMB36CAHM3_B/I has a breakdown voltage (VBR) range of 34.2–37.8 V at 1.0 mA and a maximum clamping voltage (VC) of 49.9 V at 12.0 A IPPM. This yields a clamping ratio (VC/VBR) of approximately 1.37, indicating tight voltage control during surge events - critical for protecting 3.3 V or 5 V logic interfaces without overstressing downstream components.
Can P6SMB36CAHM3_B/I be used in place of a unidirectional TVS like P6SMB36A?
No - P6SMB36CAHM3_B/I is bidirectional and lacks polarity marking, while P6SMB36A is unidirectional with cathode band identification. Substituting them requires verifying circuit topology: bidirectional use is mandatory for AC signals or differential buses; unidirectional is required for DC power rails where reverse conduction must be blocked. Interchange alters protection behavior and may compromise system safety.
What is the thermal resistance and recommended PCB layout for P6SMB36CAHM3_B/I?
P6SMB36CAHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. The recommended layout uses minimum pad dimensions of 0.086" × 0.060" (2.18 mm × 1.52 mm) with solder mask defined, per Vishay's mechanical drawings - ensuring adequate heat dissipation during repetitive surge events.
P6SMB36CAHM3_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):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
P6SMB36CAHM3_B/I FAQ
1.How can I place an order for P6SMB36CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB36CAHM3_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 P6SMB36CAHM3_B/I reliable?
The price and inventory of P6SMB36CAHM3_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 P6SMB36CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB36CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB36CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB36CAHM3_B/I?
P6SMB36CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB36CAHM3_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 P6SMB36CAHM3_B/I?
For technical support, including P6SMB36CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB36CAHM3_B/I requirements.
6.How does Aetrix verify that P6SMB36CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB36CAHM3_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 P6SMB36CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB36CAHM3_B/I?
All P6SMB36CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB36CAHM3_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 P6SMB36CAHM3_B/I part is unused and in its original packaging.
Return procedure for P6SMB36CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB36CAHM3_B/I Tags
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