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Vishay General Semiconductor - Diodes Division P6SMB20CAHE3_A/H
- Part No.:
- P6SMB20CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20CAHE3_A/H.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB20CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 20 V standoff voltage (VWM), 27.7 V clamping voltage (VC) at 21.7 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 μs waveform. It protects signal lines and power rails in automotive sensor interfaces, industrial I/O modules, and telecom front-end circuits against ESD and inductive switching transients.
For engineers reviewing the P6SMB20CAHE3_A/H datasheet, P6SMB20CAHE3_A/H pinout, P6SMB20CAHE3_A/H application, or P6SMB20CAHE3_A/H equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification status, 27.7 V max clamping at 21.7 A, 1.0 μA max reverse leakage at 17.1 V, and SMB package thermal resistance (RθJA = 100 °C/W).
Technical Context
This device operates as a voltage-clamped surge protector: when transient voltage exceeds its breakdown threshold (VBR min = 20.9 V, max = 23.1 V at 1 mA), it enters avalanche conduction to shunt energy away from downstream circuitry. Its bidirectional symmetry enables protection on AC-coupled or floating signal paths without polarity concerns.
Designed for high-reliability environments, P6SMB20CAHE3_A/H features glass-passivated junctions, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and is qualified to AEC-Q101 for automotive use. Its 150 °C maximum junction temperature and low incremental surge resistance support robust operation under repetitive surge stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 17.1 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping onset. |
| VBR (Breakdown) | 20.9–23.1 V at 1 mA - Voltage range where avalanche conduction begins; ensures predictable turn-on during transients. |
| VC (Clamping) | 27.7 V at IPPM = 21.7 A - Maximum voltage seen by protected circuit during 600 W surge; critical for IC-level overvoltage margining. |
| PPPM | 600 W (10/1000 μs) - Peak transient energy handling capacity; supports IEC 61000-4-5 Level 3/4 surge immunity testing. |
| ID (Leakage) | 1.0 μA max at VWM - Low standby current preserves signal integrity and battery life in always-on sensor nodes. |
| TJ max | 150 °C - Enables deployment in under-hood automotive or high-ambient industrial enclosures without derating. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient; informs PCB copper pad sizing (0.2" × 0.2") for sustained power dissipation. |
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); matte tin-plated terminals, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Conducts surge current in either direction; connects to line being protected (e.g., RS-485 A/B, CAN H/L, or sensor output). |
| Cathode | Transient current entry (bidirectional) | Paired terminal with anode; forms symmetrical clamp path-no cathode band marking distinguishes bidirectional variants. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC or differential signals (e.g., USB D+/D−, CAN bus) without external polarity management. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensor interfaces, and infotainment power rails. |
| 600 W peak pulse rating | Withstands IEC 61000-4-5 combination wave surges (e.g., 2 Ω source impedance, 40 A) without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.22) | Minimizes overvoltage stress on protected ICs-critical for 3.3 V or 5 V logic interfacing with 20 V-rated TVS. |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without dry-pack or baking, reducing manufacturing overhead and handling risk. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments subject 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. Use Value: Limits transient voltage to ≤27.7 V during 100 V/50 ms load dump events, preventing ADC saturation and latch-up. |
Use Scenario: Shielding RS-485 transceiver (e.g., SN65HVD230) data lines from EFT bursts and cable discharge events in factory automation networks. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground TVS on A/B differential pair and common-mode reference. Use Value: Clamps fast transients (<1 ns rise time) while maintaining <1.0 μA leakage at 17.1 V, preserving bus DC bias stability. |
| Telecom Power Input | Consumer USB Port ESD |
Use Scenario: Safeguarding 24 V DC input stage of VoIP phone power supply against lightning-induced surges on PoE or auxiliary lines. IC Role / Device Role / Timing Role: Primary surge suppression device upstream of DC-DC converter input capacitor. Use Value: Absorbs 600 W peak energy without failure, enabling compliance with ITU-T K.21 basic protection level. |
Use Scenario: ESD protection for USB 2.0 data lines (D+/D−) in portable speakers and docking stations exposed to human-body-model discharges. IC Role / Device Role / Timing Role: Bidirectional low-capacitance TVS placed directly at USB connector pins. Use Value: Responds in <1 ps to ±15 kV HBM events while adding <0.5 pF parasitic capacitance-no signal integrity impact. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20CA | Same VWM (17.1 V), VC = 32.4 V at 18.5 A, lower PPPM (400 W), non-AEC-Q101. | Not qualified for automotive; suitable for commercial-grade industrial or consumer equipment only. | Select when AEC-Q101 is not required and cost sensitivity outweighs 33 % lower clamping performance. |
| SMCJ20CA | Same VWM (17.1 V), higher PPPM (1500 W), VC = 32.4 V at 46.2 A, larger SMC (DO-214AB) package. | Requires larger PCB footprint and higher thermal mass; used where surge energy exceeds 600 W. | Choose when system-level surge testing requires >600 W rating and board space permits SMC footprint. |
Compared with SMAJ20CA and SMCJ20CA, P6SMB20CAHE3_A/H delivers optimal balance of AEC-Q101 compliance, SMB footprint, and 27.7 V clamping-making it the preferred choice for space-constrained automotive and industrial designs needing validated reliability.
Availability
P6SMB20CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom power input stages requiring stable component supply, long-term lifecycle assurance, and traceable AEC-Q101 sourcing.
Supply support for P6SMB20CAHE3_A/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 P6SMB Series targets high-energy transient suppression in compact surface-mount formats, designed specifically for automotive, industrial, and telecom applications demanding AEC-Q101 validation and robust 600 W surge handling in SMB footprint.
FAQ
What does the "CA" suffix indicate in P6SMB20CAHE3_A/H?
The "CA" suffix denotes a bidirectional configuration-meaning P6SMB20CAHE3_A/H provides symmetrical clamping for both positive and negative transients without polarity dependence. This differs from unidirectional "A" variants (e.g., P6SMB20A), which require correct cathode orientation and only clamp in one direction. The CA version is ideal for AC-coupled or differential signal lines like CAN or RS-485.
Is P6SMB20CAHE3_A/H suitable for automotive applications?
Yes, P6SMB20CAHE3_A/H is AEC-Q101 qualified, as confirmed by its "HE3" suffix and Vishay's documentation. It meets rigorous stress tests for temperature cycling, humidity, mechanical shock, and surge endurance-making it appropriate for engine control, body electronics, and ADAS sensor protection where reliability under harsh conditions is mandatory.
What is the maximum clamping voltage of P6SMB20CAHE3_A/H and under what test condition?
The maximum clamping voltage of P6SMB20CAHE3_A/H is 27.7 V, measured at a peak pulse current (IPPM) of 21.7 A using the standardized 10/1000 μs double-exponential waveform. This value is guaranteed across temperature and lifetime, and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
How does the SMB (DO-214AA) package of P6SMB20CAHE3_A/H compare thermally to larger packages?
P6SMB20CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads-higher than SMC (DO-214AB) or SMCJ devices (~50–60 °C/W). This means it relies more on PCB copper area for heat dissipation; designers must follow Vishay's recommended pad layout to avoid exceeding 150 °C junction temperature during repetitive surges.
Can P6SMB20CAHE3_A/H replace older P6SMB20CA parts without design changes?
Yes-P6SMB20CAHE3_A/H maintains identical electrical specifications, SMB package dimensions, and pinout as legacy P6SMB20CA variants. The "HE3" suffix adds AEC-Q101 qualification and RoHS compliance but does not alter form, fit, or function. No PCB layout or schematic modifications are needed for drop-in replacement in existing designs.
P6SMB20CAHE3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB20CAHE3_A/H FAQ
1.How can I place an order for P6SMB20CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20CAHE3_A/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 P6SMB20CAHE3_A/H reliable?
The price and inventory of P6SMB20CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB20CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for P6SMB20CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20CAHE3_A/H?
P6SMB20CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20CAHE3_A/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 P6SMB20CAHE3_A/H?
For technical support, including P6SMB20CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20CAHE3_A/H requirements.
6.How does Aetrix verify that P6SMB20CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P6SMB20CAHE3_A/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 P6SMB20CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of P6SMB20CAHE3_A/H?
All P6SMB20CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20CAHE3_A/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 P6SMB20CAHE3_A/H part is unused and in its original packaging.
Return procedure for P6SMB20CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB20CAHE3_A/H Tags
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