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Vishay General Semiconductor - Diodes Division P6SMB18CAHM3_A/H
- Part No.:
- P6SMB18CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18CAHM3_A/H.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,968
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Product details
Overview
P6SMB18CAHM3_A/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 and power lines. It features 18 V standoff voltage (VWM), 25.2 V maximum clamping voltage at 23.8 A peak pulse current, and 600 W peak pulse power capability with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the P6SMB18CAHM3_A/H datasheet, P6SMB18CAHM3_A/H pinout, P6SMB18CAHM3_A/H application, or P6SMB18CAHM3_A/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compliance with J-STD-020 MSL level 1 reflow profile.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its glass-passivated junction enables fast response time (<1 ns) and low incremental surge resistance, critical for suppressing ESD and inductive switching spikes on bidirectional data or supply rails.
Rated for -65 °C to +150 °C operating junction temperature and qualified per AEC-Q101, P6SMB18CAHM3_A/H supports automotive-grade reliability under repetitive transient stress. The SMB package provides 5.0 mm × 5.0 mm copper pad thermal dissipation per terminal, enabling stable 5.0 W steady-state power handling at TA = 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 15.3 V - Maximum continuous reverse voltage before conduction begins in either direction |
| VBR (Breakdown) | 17.1–18.9 V at 1 mA - Guaranteed symmetric avalanche initiation threshold across polarity |
| VC (Clamping) | 25.2 V at 23.8 A (10/1000 μs) - Peak line voltage seen by protected circuit during worst-case surge |
| PPPM | 600 W - Sustained transient energy absorption without failure under standardized surge waveform |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads |
| TJ max. | +150 °C - Maximum allowable junction temperature for long-term reliability and derating compliance |
| AEC-Q101 | Qualified - Validated for automotive electronic modules per stress test requirements (HTOL, TC, UHAST, etc.) |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002. No polarity marking - bidirectional operation confirmed.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical electrical behavior in both directions; no cathode band marking required |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity concerns |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on 12 V systems with margin |
| AEC-Q101 qualification | Validated for under-hood and chassis-mounted automotive electronics requiring extended temperature and life-cycle robustness |
| MSL Level 1 | Compatible with standard lead-free reflow profiles up to 260 °C peak without preconditioning |
| Glass-passivated junction | Ensures stable VBR over time and temperature, with <0.1 %/°C drift and low leakage (<1 μA at VWM) |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and Hall-effect sensor outputs from load-dump and ESD events in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to limit transient excursions below IC absolute maximum ratings. Use Value: Prevents latch-up or gate oxide damage in transceivers by clamping to ≤25.2 V during 10/1000 μs surges up to 23.8 A. |
Use Scenario: Safeguarding 4–20 mA current-loop inputs in programmable logic controllers against field-wiring induced transients and ground-bounce coupling. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting surge energy away from precision op-amp front-end and ADC reference paths. Use Value: Maintains analog signal integrity with <1 μA leakage at 15.3 V, avoiding offset errors in microamp-level input circuits. |
| Consumer USB-C Port Protection | Telecom DSL Line Interface |
Use Scenario: Secondary-level surge suppression on VBUS and CC lines of USB-C receptacles exposed to hot-plug and cable-induced transients. IC Role / Device Role / Timing Role: Fast-response clamping element placed after primary common-mode choke to handle differential-mode surges. Use Value: Limits VBUS overshoot to 25.2 V during 8 kV contact ESD (IEC 61000-4-2), preserving USB PD controller functionality. |
Use Scenario: Overvoltage protection on twisted-pair DSL line drivers and receivers subjected to lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: Symmetrical bidirectional suppressor bridging tip/ring to protect line interface ICs and transformer windings. Use Value: Clamps longitudinal mode surges to ≤25.2 V while maintaining >100 MHz bandwidth due to low junction capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18CA | Same VWM/VBR/VC specs but SMA package (higher RθJA = 140 °C/W); not AEC-Q101 qualified | Limited to commercial-temperature industrial or consumer use; unsuitable for automotive under-hood placement | Select when cost sensitivity outweighs thermal or automotive qualification requirements |
| 1.5SMC18CA | Higher PPPM (1500 W), larger SMC package; same VWM/VC but higher IPPM (65.2 A) | Used where higher surge margin is needed (e.g., outdoor telecom cabinets), but requires larger PCB area | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 and board space permits SMC footprint |
Compared with SMAJ18CA and 1.5SMC18CA, P6SMB18CAHM3_A/H delivers optimal balance of automotive qualification, SMB footprint efficiency, and 600 W surge capability - making it preferred for space-constrained, thermally managed, and AEC-Q101–mandated designs.
Availability
P6SMB18CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, consumer USB-C port protection, and telecom DSL line interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P6SMB18CAHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on high-reliability and automotive-grade solutions.
The P6SMB Series targets robust transient suppression in harsh environments - engineered specifically for AEC-Q101 compliance, low-profile surface-mount integration, and repeatable clamping performance across temperature and lifetime.
FAQ
What does the "CA" suffix indicate in P6SMB18CAHM3_A/H?
The "CA" suffix denotes a bidirectional configuration - meaning P6SMB18CAHM3_A/H provides symmetrical clamping in both forward and reverse directions, unlike unidirectional variants (e.g., P6SMB18AHM3_A/H). This eliminates polarity concerns during PCB layout and enables protection of AC-coupled or differential signal paths without orientation constraints. The device has no cathode marking and is validated for equal VBR and VC in either polarity.
Is P6SMB18CAHM3_A/H qualified for automotive applications?
Yes, P6SMB18CAHM3_A/H is AEC-Q101 qualified, as indicated by the "HM3" suffix and documented in Vishay's ordering information table. It undergoes stress testing including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (UHAST) to ensure reliability in automotive environments such as engine control units, body electronics, and ADAS sensor modules.
What is the maximum clamping voltage of P6SMB18CAHM3_A/H under surge conditions?
The maximum clamping voltage (VC) of P6SMB18CAHM3_A/H is 25.2 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 23.8 A. This value is guaranteed per the datasheet's Electrical Characteristics table and represents the highest voltage that will appear across the protected circuit during a standardized surge event - critical for ensuring downstream ICs remain within their absolute maximum voltage ratings.
How does the SMB package of P6SMB18CAHM3_A/H affect thermal performance?
The SMB (DO-214AA) package of P6SMB18CAHM3_A/H delivers 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. This allows reliable 5.0 W steady-state power dissipation at TA = 50 °C and supports repeated 600 W transient events without thermal runaway, provided PCB layout follows Vishay's recommended pad dimensions and thermal relief guidelines.
Can P6SMB18CAHM3_A/H replace unidirectional TVS diodes in existing designs?
No - P6SMB18CAHM3_A/H is strictly bidirectional and must not be substituted for unidirectional TVS diodes (e.g., P6SMB18AHM3_A/H) without circuit review. While both share identical VWM and VC values, unidirectional types conduct only in reverse bias and require correct cathode orientation; using P6SMB18CAHM3_A/H in their place may compromise protection on DC-biased lines or cause unintended conduction during normal operation. Always verify polarity requirements before substitution.
P6SMB18CAHM3_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):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 23.8A
- 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)
P6SMB18CAHM3_A/H FAQ
1.How can I place an order for P6SMB18CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18CAHM3_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 P6SMB18CAHM3_A/H reliable?
The price and inventory of P6SMB18CAHM3_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 P6SMB18CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for P6SMB18CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18CAHM3_A/H?
P6SMB18CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18CAHM3_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 P6SMB18CAHM3_A/H?
For technical support, including P6SMB18CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18CAHM3_A/H requirements.
6.How does Aetrix verify that P6SMB18CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P6SMB18CAHM3_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 P6SMB18CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of P6SMB18CAHM3_A/H?
All P6SMB18CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18CAHM3_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 P6SMB18CAHM3_A/H part is unused and in its original packaging.
Return procedure for P6SMB18CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18CAHM3_A/H Tags
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