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Vishay General Semiconductor - Diodes Division P6SMB18AHM3_A/H
- Part No.:
- P6SMB18AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB18AHM3_A/H.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,401
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Product details
Overview
P6SMB18AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 18 V standoff voltage (VWM), 25.2 V clamping voltage at 23.8 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform - deployed for overvoltage protection of MOSFETs and signal lines in industrial sensor interfaces.
For engineers reviewing the P6SMB18AHM3_A/H datasheet, P6SMB18AHM3_A/H pinout, P6SMB18AHM3_A/H application, or P6SMB18AHM3_A/H equivalent, key selection criteria include clamping performance under 10/1000 μs transients, unidirectional polarity marking, AEC-Q101 qualification status, halogen-free RoHS compliance, and thermal resistance (RθJA = 100 °C/W) in automated SMT assembly environments.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity identification, leveraging glass-passivated junction technology for stable breakdown behavior and low incremental surge resistance. It delivers fast response time (<1 ns) and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
The device is designed for transient suppression on DC power rails and low-speed signal paths where precise VWM = 15.3 V and VBR = 17.1–18.9 V (at IT = 1.0 mA) ensure reliable margin above operating voltage while maintaining low leakage (<1.0 μA at VWM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 15.3 V - maximum continuous reverse working voltage before clamping initiates; sets safe operating margin above 12 V nominal rail |
| VBR (Breakdown) | 17.1–18.9 V at 1.0 mA - verified breakdown threshold ensuring predictable turn-on during transients |
| VC (Clamping) | 25.2 V at IPPM = 23.8 A - peak voltage seen by protected circuit during 600 W 10/1000 μs surge |
| PPPM | 600 W - peak pulse power handling capability with 0.01% duty cycle; defines transient energy absorption limit |
| IPPM | 23.8 A - maximum non-repetitive peak pulse current supported under standard 10/1000 μs waveform |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on 0.2" × 0.2" copper pads; informs derating above 25 °C ambient |
| TJ max. | +150 °C - maximum junction temperature rating enabling operation in under-hood or industrial enclosures |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential side of protected line | Reference node for unidirectional clamping - must be tied to ground or return path when protecting positive rail |
| Cathode | Current exit terminal in forward bias; marked with band on package | Connected to protected line (e.g., 12 V supply or sensor output); conducts during overvoltage to shunt surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 3 surges (1 kV/42 Ω) on 12 V systems without derating |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC stress test requirements |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift across -65 °C to +150 °C operating range |
| MSL Level 1 (260 °C peak) | Supports single-reflow SMT assembly without moisture sensitivity concerns or baking preconditioning |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes let-through voltage during surge, reducing stress on downstream ICs such as microcontrollers or CAN transceivers |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects 12 V power input and LIN bus signal lines from load dump and inductive switching transients in vehicle door modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN transceiver VCC pin and chassis ground to clamp negative-going spikes and positive surges up to 600 W. Use Value: Maintains VC ≤ 25.2 V during 10/1000 μs transients, preventing latch-up or damage to LIN PHY ICs rated for 36 V absolute max. |
Use Scenario: Shields 24 V digital input optocoupler front-end from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Mounted across input terminals to divert surge current away from series current-limiting resistor and opto-LED anode. Use Value: Clamps transients within 1 ns to <25.2 V, preserving LED forward voltage margin and avoiding false triggering of input logic. |
| Consumer Appliance Motor Drive Board | Telecom Remote Power Feeder |
Use Scenario: Guards MCU GPIO pins and gate driver supply rails against back-EMF from brushed DC motor commutation. IC Role / Device Role / Timing Role: Placed on 5 V LDO output feeding half-bridge gate drivers; cathode tied to rail, anode to ground. Use Value: Limits voltage overshoot to 25.2 V during 100 A inductive kickback, preventing gate oxide rupture in 20 V-rated MOSFETs. |
Use Scenario: Installed on 48 V PoE-like remote power feed line to suppress lightning-induced surges entering telecom base station equipment. IC Role / Device Role / Timing Role: Connected between feed line and local ground plane upstream of DC/DC converter input filter. Use Value: Absorbs up to 600 W transient energy while holding clamped voltage below 25.2 V, protecting primary-side FETs and controller ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-E3/52 | Same VWM (15.3 V), identical SMB package, but rated for 400 W PPPM and lacks AEC-Q101 qualification | Not suitable for automotive production; limited to commercial-grade industrial or consumer use | Select when cost sensitivity outweighs automotive qualification and 600 W surge headroom is unnecessary |
| 1.5SMC18A | Same electrical specs (VWM, VBR, VC) but in larger SMC (DO-214AB) package; RθJA = 60 °C/W vs. 100 °C/W | Higher thermal mass allows higher average power dissipation but requires larger PCB footprint | Choose when board space permits and improved thermal performance justifies larger package and layout change |
Compared with SMAJ18A-E3/52 and 1.5SMC18A, P6SMB18AHM3_A/H uniquely combines AEC-Q101 qualification, halogen-free construction, and 600 W surge capability in the compact SMB footprint - making it optimal for space-constrained automotive and industrial designs requiring certified reliability.
Availability
P6SMB18AHM3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, and telecom remote power feeders requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for P6SMB18AHM3_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 TVS devices with emphasis on high-reliability, automotive-qualified, and thermally optimized components.
The P6SMB Series was developed specifically for surface-mount transient suppression in space-constrained, high-surge environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 validation and consistent clamping performance.
FAQ
What is the clamping voltage of P6SMB18AHM3_A/H at its rated peak pulse current?
The P6SMB18AHM3_A/H has a maximum clamping voltage (VC) of 25.2 V at its rated peak pulse current (IPPM) of 23.8 A, measured using the standard 10/1000 μs double-exponential waveform. This value ensures protected circuits see no more than 25.2 V during worst-case transients, critical for safeguarding 3.3 V or 5 V logic interfaces downstream of the P6SMB18AHM3_A/H.
Is P6SMB18AHM3_A/H qualified for automotive applications?
Yes, P6SMB18AHM3_A/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It undergoes stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 requirements - making it suitable for under-hood and body electronics where reliability is mandated.
What does the "_A/H" suffix in P6SMB18AHM3_A/H indicate?
The "_A/H" suffix in P6SMB18AHM3_A/H specifies packaging and revision: "A" denotes the revision code per Vishay's internal documentation, and "H" indicates 7-inch plastic tape-and-reel delivery (750 units per reel). The full ordering code confirms halogen-free, RoHS-compliant, AEC-Q101-qualified construction in SMB (DO-214AA) package.
How does P6SMB18AHM3_A/H compare to bidirectional TVS diodes like P6SMB18CA?
P6SMB18AHM3_A/H is unidirectional and features a cathode band for polarity identification, whereas P6SMB18CA is bidirectional with no polarity marking. The unidirectional version offers lower leakage (<1.0 μA at VWM) and is preferred for DC rail protection, while the bidirectional variant suits AC-coupled or dual-polarity signal lines - the P6SMB18AHM3_A/H is not interchangeable with P6SMB18CA without circuit redesign.
What is the thermal resistance of P6SMB18AHM3_A/H, and how does it affect layout?
P6SMB18AHM3_A/H 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. This value assumes minimum recommended pad layout; reducing pad area increases RθJA, requiring derating of power handling above 25 °C ambient - PCB layout must follow Vishay's specified mounting pad dimensions to maintain thermal performance and avoid premature failure.
P6SMB18AHM3_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:
- 1
- Bidirectional Channels:
- -
- 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)
P6SMB18AHM3_A/H FAQ
1.How can I place an order for P6SMB18AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB18AHM3_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 P6SMB18AHM3_A/H reliable?
The price and inventory of P6SMB18AHM3_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 P6SMB18AHM3_A/H is usually 5 days.
3.What payment methods are accepted for P6SMB18AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB18AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB18AHM3_A/H?
P6SMB18AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB18AHM3_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 P6SMB18AHM3_A/H?
For technical support, including P6SMB18AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB18AHM3_A/H requirements.
6.How does Aetrix verify that P6SMB18AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P6SMB18AHM3_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 P6SMB18AHM3_A/H meets industry standards.
7.What is the process for return or replacement of P6SMB18AHM3_A/H?
All P6SMB18AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB18AHM3_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 P6SMB18AHM3_A/H part is unused and in its original packaging.
Return procedure for P6SMB18AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB18AHM3_A/H Tags
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Diodes Incorporated
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