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Taiwan Semiconductor Corporation P6SMB51CAH
- Part No.:
- P6SMB51CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51CAH.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,900
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Product details
Overview
P6SMB51CAH from Taiwan Semiconductor is a bidirectional 600W surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AA (SMB) package, with 48.5V minimum and 53.6V maximum breakdown voltage (VBR), 43.6V standoff voltage (VWM), and 70.1V clamping voltage (VC) at 8.9A peak pulse current - designed for automotive-grade ESD and load-dump protection in power supply rails and CAN/LIN interfaces.
For engineers reviewing the P6SMB51CAH datasheet, P6SMB51CAH pinout, P6SMB51CAH application, or P6SMB51CAH equivalent, this AEC-Q101 qualified TVS offers verified bidirectional clamping, <1 µA leakage at VWM, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and J-STD-020 Level 1 moisture sensitivity - critical for under-hood electronics, infotainment power inputs, and industrial sensor interface protection.
Technical Context
This device implements a glass-passivated silicon junction optimized for fast transient suppression (<1.0 ps response from 0 V to VBR(min)) and robust energy handling across repetitive and non-repetitive surge events. Its bipolar configuration enables symmetrical clamping in both directions without external polarity management.
Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, supporting operation from –55°C to +150°C junction temperature. The DO-214AA package delivers low-profile mounting compatibility with automated SMT assembly and meets UL 94V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V - ensures reliable triggering above system operating voltage while accommodating manufacturing tolerance |
| VWM | 43.6 V - maximum continuous reverse voltage before significant leakage; sets safe operating margin for 36 V nominal automotive systems |
| VC @ IPPM | 70.1 V at 8.9 A - limits downstream voltage stress during ISO 7637-2 Pulse 2b (inductive switch-off) transients |
| PPPSM | 600 W - handles high-energy 10/1000 µs surges typical of automotive load-dump events |
| IR @ VWM | <1 µA - minimizes standby power loss and avoids false triggering in low-current sensor circuits |
| TJ(max) | +150 °C - supports under-hood placement near engines or power converters without thermal derating concerns |
| Configuration | Bidirectional - eliminates need for polarity-aware layout; protects AC-coupled or differential signal lines symmetrically |
Pinout & Package
DO-214AA (SMB) surface-mount package: 3.56 mm × 4.57 mm body, 2.3 mm height, matte tin-plated leads, cathode band marking for unidirectional variants (not applicable - P6SMB51CAH is bidirectional; no polarity marking required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical electrical behavior in either direction; connects across protected line and ground or between differential lines |
| Case (exposed metal) | Thermal path only | No internal electrical connection; serves as heatsink interface but not functional terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS power domains |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive flyback), Pulse 2a/2b (load dump), and Pulse 3a/3b (switching noise) immunity requirements |
| Glass-passivated junction | Enhances long-term reliability under humidity and thermal cycling vs. epoxy-passivated alternatives |
| J-STD-020 Level 1 rating | Enables standard reflow profiles without pre-baking; supports high-volume SMT manufacturing |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained designs |
Applications
| Automotive Power Rail Protection | CAN/LIN Bus Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load-dump transients up to 35 V and inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional TVS placed between power rail and chassis ground to clamp overvoltage before it reaches DC-DC regulators or microcontrollers. Use Value: Limits peak rail voltage to ≤70.1 V during 600 W surges, preventing latch-up or permanent damage to downstream 5 V/3.3 V logic. |
Use Scenario: Safeguarding CAN FD transceivers against ESD events (>8 kV contact) and bus faults in vehicle networking. IC Role / Device Role / Timing Role: Placed differentially across CAN_H/CAN_L lines to suppress common-mode transients without distorting signal integrity. Use Value: Clamps ±70.1 V surges within <1 ps, preserving CAN bit timing and meeting ISO 11898-2 EMC immunity requirements. |
| Industrial Sensor Signal Conditioning | LED Driver Input Stage Protection |
|
Use Scenario: Shielding 4–20 mA analog input stages in PLC modules from field-wiring induced surges and lightning-induced coupling. IC Role / Device Role / Timing Role: Connected from signal line to ground on front-end op-amp inputs to absorb fast transients before amplification. Use Value: Sub-µA leakage at 43.6 V standoff preserves mA-level accuracy; 600 W rating handles multi-kV surge coupling into long cables. |
Use Scenario: Securing constant-current LED driver ICs against mains-side surges in outdoor lighting fixtures. IC Role / Device Role / Timing Role: Mounted across bulk capacitor terminals to limit voltage overshoot during AC line switching or lightning strikes. Use Value: Withstands 8.9 A peak pulse current at 70.1 V clamp, preventing overvoltage failure of MOSFETs or controller ICs rated for ≤80 V absolute max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51CA | Same DO-214AC (SMA) package; lower 400 W PPPSM; VC = 87.1 V at 4.6 A | Lower surge capacity suits consumer-grade 12 V supplies, not automotive load-dump duty cycles | Select when cost-sensitive, non-AEC-Q101 designs require basic ESD protection with reduced footprint density |
| SMBJ51CA | Identical DO-214AA (SMB) package; same 600 W rating; VC = 87.1 V at 6.9 A - higher clamping voltage than P6SMB51CAH's 70.1 V | Higher VC may exceed downstream IC absolute max ratings in tight-margin 36 V systems | Prefer P6SMB51CAH where clamping headroom below 75 V is mandatory - e.g., protecting 60 V-rated gate drivers |
Compared with SMAJ51CA and SMBJ51CA, P6SMB51CAH delivers superior clamping performance (70.1 V vs. ≥87.1 V) and AEC-Q101 validation - making it the optimal choice for automotive power domain protection where voltage headroom and qualification rigor are design-critical.
Availability
P6SMB51CAH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, LED driver input stages, and CAN/LIN bus protection requiring stable component supply and full traceability.
Supply support for P6SMB51CAH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in high-reliability protection devices, rectifiers, and power management components.
The P6SMB series is part of TSC's AEC-Q101-qualified TVS portfolio engineered specifically for harsh-environment automotive and industrial power rail and signal line protection - emphasizing low clamping voltage, fast response, and process-controlled consistency.
FAQ
What is the breakdown voltage range for P6SMB51CAH?
The P6SMB51CAH has a guaranteed breakdown voltage (VBR) range of 48.5 V to 53.6 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This range reflects process-controlled variation and ensures consistent triggering behavior across production lots while maintaining safe margin above its 43.6 V standoff voltage.
Is P6SMB51CAH suitable for automotive applications?
Yes, P6SMB51CAH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements - making it suitable for under-hood ECUs, body control modules, and infotainment power inputs. Its –55°C to +150°C operating range and J-STD-020 Level 1 moisture rating further validate its automotive readiness.
How does P6SMB51CAH differ from unidirectional P6SMB51H?
P6SMB51CAH is bidirectional with symmetrical clamping in both polarities, while P6SMB51H is unidirectional and requires correct anode/cathode orientation. P6SMB51CAH has identical VBR, VWM, and PPPSM specs but replaces polarity-dependent forward conduction with dual-quadrant transient suppression - ideal for AC or differential signal paths.
What is the maximum clamping voltage of P6SMB51CAH and at what current?
The maximum clamping voltage (VC) of P6SMB51CAH is 70.1 V, measured at 8.9 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and is critical for ensuring downstream ICs remain within absolute maximum ratings.
Does P6SMB51CAH have a polarity marking on the package?
No, P6SMB51CAH does not feature a cathode band or polarity marking because it is a bidirectional device. Its DO-214AA (SMB) package has symmetrical terminals - either end functions identically as anode or cathode depending on transient polarity - eliminating orientation constraints during PCB layout and automated placement.
P6SMB51CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 8.9A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB51CAH FAQ
1.How can I place an order for P6SMB51CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51CAH 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 P6SMB51CAH reliable?
The price and inventory of P6SMB51CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB51CAH is usually 5 days.
3.What payment methods are accepted for P6SMB51CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51CAH?
P6SMB51CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51CAH 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 P6SMB51CAH?
For technical support, including P6SMB51CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51CAH requirements.
6.How does Aetrix verify that P6SMB51CAH is sourced from the original manufacturer or authorized distributors?
All P6SMB51CAH 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 P6SMB51CAH meets industry standards.
7.What is the process for return or replacement of P6SMB51CAH?
All P6SMB51CAH units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51CAH, 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 P6SMB51CAH part is unused and in its original packaging.
Return procedure for P6SMB51CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51CAH Tags
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