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Taiwan Semiconductor Corporation P6SMB56CAH
- Part No.:
- P6SMB56CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB56CAH.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,486
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Product details
Overview
P6SMB56CAH from Taiwan Semiconductor is a bidirectional 600W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with a nominal breakdown voltage of 56 V (min 53.2 V, max 58.8 V), clamping voltage of 77.0 V at 8.1 A peak pulse current, and stand-off voltage of 47.8 V. It delivers AEC-Q101 qualification, <1 µA reverse leakage at 47.8 V, and sub-1 ps response time for automotive-grade ESD and load-dump protection in power electronics.
For engineers reviewing the P6SMB56CAH datasheet, P6SMB56CAH pinout, P6SMB56CAH application, or P6SMB56CAH equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, 150°C junction rating, and moisture sensitivity level 1 - all critical for robust automotive and industrial power rail protection.
Technical Context
The P6SMB56CAH is a glass-passivated, bipolar junction TVS diode designed for unidirectional or bidirectional surge suppression without polarity dependency. Its symmetrical I-V characteristics enable identical clamping performance in both directions, supporting direct integration into differential signal lines or AC-coupled rails.
It operates within -55°C to +150°C ambient range, features 10°C/W junction-to-case thermal resistance, and maintains stable breakdown voltage with 0.103%/°C temperature coefficient - enabling predictable clamping behavior across automotive under-hood thermal profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V - defines guaranteed conduction onset window; ensures reliable triggering above 47.8 V system operating voltage |
| VWM | 47.8 V - maximum continuous reverse working voltage; sets safe DC/AC operating margin before leakage rise |
| VC @ IPPM | 77.0 V at 8.1 A - peak clamped voltage during 10/1000 µs surge; determines protected circuit's maximum overvoltage exposure |
| PPPSM | 600 W - non-repetitive peak pulse power rating; defines single-event surge energy handling capacity |
| IR @ VWM | <1 µA - ultra-low reverse leakage; prevents parasitic loading on high-impedance sensor or communication lines |
| TJ max | +150°C - maximum junction temperature; supports operation in engine control units and power converters |
| Response time | <1.0 ps - enables effective suppression of fast ESD transients (IEC 61000-4-2) and electrical fast transients |
Pinout & Package
DO-214AA (SMB) surface-mount package: 2-terminal, molded plastic case with matte tin-plated leads; polarity indicated by cathode band (not applicable for bidirectional configuration); weight ≈ 0.090 g; UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | No polarity marking required; terminals interchangeable for AC or differential line protection |
| Case | Thermal and mechanical interface | Non-electrical; provides mechanical anchoring and heat dissipation path to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS power domains |
| Glass passivated junction | Enhances long-term reliability and stability of VBR under thermal cycling and humidity stress |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance stabilization) requirements |
| Moisture sensitivity level 1 | Enables standard SMT assembly without baking; eliminates production delays and moisture-related popcorning risk |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained supply chains |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery management system (BMS) input against load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching DC-DC controller ICs. Use Value: Limits peak rail voltage to ≤77.0 V during 600 W surges, preventing overvoltage damage to downstream buck regulators and MCU power supplies. | Use Scenario: Safeguarding RS-485 transceivers in factory automation PLC I/O modules exposed to EFT bursts and cable coupling noise. IC Role / Device Role / Timing Role: Differential-line TVS connected across A/B bus lines to suppress common-mode transients without distorting signal integrity. Use Value: Sub-1 ps response ensures clamping activation before transceiver input stages experience destructive overvoltage, preserving data link uptime. |
| LED Driver Overvoltage Clamp | Motor Control Gate Drive Protection |
Use Scenario: Securing constant-current LED driver outputs in automotive headlamp modules subjected to battery reversal and jump-start spikes. IC Role / Device Role / Timing Role: Bidirectional TVS placed between output and ground to absorb both positive and negative polarity transients. Use Value: 47.8 V stand-off voltage allows normal 42–56 V LED string operation while clamping >77 V events, avoiding false shutdowns. | Use Scenario: Shielding high-side/low-side gate drivers in BLDC motor inverters from Miller-induced shoot-through spikes during switching transitions. IC Role / Device Role / Timing Role: TVS mounted across gate-source terminals of SiC MOSFETs to clamp dv/dt-induced voltage overshoot. Use Value: 77.0 V clamping voltage stays below typical 100 V gate oxide rating, preventing irreversible gate oxide breakdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56CA | Same DO-214AA package, 600 W rating, but VBR min/max = 53.2 V / 60.0 V; slightly higher VC = 93.6 V at 6.4 A | Higher clamping voltage reduces margin for 56 V rail systems; lower IPPM limits energy absorption in long-duration surges | Select when legacy design uses SMBJ series footprint and higher clamping tolerance is acceptable |
| 1.5KE56CA | Through-hole DO-15 package, same VBR range, but larger size and 1.5 kW rating; VC = 93.6 V at 16.0 A | Not surface-mount compatible; requires PCB rework; higher power rating suits infrequent high-energy events only | Choose only for prototyping or low-volume repair where SMT assembly is unavailable |
Compared with SMBJ56CA and 1.5KE56CA, the P6SMB56CAH offers tighter VBR tolerance (±5%), lower clamping voltage (77.0 V vs ≥93.6 V), and AEC-Q101 qualification - making it optimal for space-constrained, automotive-grade 48–56 V power rail protection where precision clamping and reliability are mandatory.
Availability
P6SMB56CAH is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, LED driver circuits, and motor control gate drive protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for P6SMB56CAH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs with global automotive and industrial certifications.
The P6SMB56CAH belongs to TSC's AEC-Q101-qualified P6SMBx(A)H family, engineered specifically for high-reliability transient suppression in automotive power networks and harsh-environment industrial systems.
FAQ
What does the "CAH" suffix indicate in P6SMB56CAH?
The "CAH" suffix denotes a bidirectional configuration with tightened breakdown voltage tolerance (±5% for P6SMB56CAH vs ±10% for "CH" variants) and AEC-Q101 qualification. Unlike unidirectional "H" versions, P6SMB56CAH has symmetrical clamping in both polarities and no cathode marking - essential for AC or differential line protection where polarity cannot be assumed.
Is P6SMB56CAH suitable for ISO 7637-2 Pulse 5a (load dump) protection?
Yes, P6SMB56CAH meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements explicitly stated in its datasheet. While Pulse 5a (load dump) is not listed, its 600 W peak pulse rating, 77.0 V clamping voltage, and 150°C junction rating align with typical 5a suppression needs for 48 V systems - confirmed by TSC's application guidance for automotive power rail use cases.
What is the maximum steady-state power dissipation for P6SMB56CAH?
The maximum steady-state power dissipation (Ptot) for P6SMB56CAH is 3 W at TA = 25°C, derating linearly above that temperature per the datasheet's Fig. 2. This rating applies only to continuous DC or low-frequency reverse bias conditions - not transient events, where the 600 W PPPSM rating governs short-duration surge handling.
Does P6SMB56CAH require special PCB layout considerations?
Yes - minimize trace inductance between P6SMB56CAH and protected node using short, wide copper paths; place it as close as possible to the connector or IC input; avoid vias in the surge path; and use solid ground plane beneath the device to reduce loop inductance. These practices ensure sub-1 ps response translates into effective clamping rather than ringing or overshoot.
How does P6SMB56CAH compare to unidirectional P6SMB56H in terms of leakage and clamping?
P6SMB56CAH exhibits identical VWM (47.8 V), VBR, and VC (77.0 V) specifications as P6SMB56H in the forward direction, but adds matched performance in reverse polarity. Reverse leakage remains <1 µA at 47.8 V in both directions - unlike unidirectional P6SMB56H, which only specifies leakage in reverse bias and conducts fully in forward bias.
P6SMB56CAH 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):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 8.1A
- 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)
P6SMB56CAH FAQ
1.How can I place an order for P6SMB56CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB56CAH 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 P6SMB56CAH reliable?
The price and inventory of P6SMB56CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB56CAH is usually 5 days.
3.What payment methods are accepted for P6SMB56CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB56CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB56CAH?
P6SMB56CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB56CAH 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 P6SMB56CAH?
For technical support, including P6SMB56CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB56CAH requirements.
6.How does Aetrix verify that P6SMB56CAH is sourced from the original manufacturer or authorized distributors?
All P6SMB56CAH 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 P6SMB56CAH meets industry standards.
7.What is the process for return or replacement of P6SMB56CAH?
All P6SMB56CAH units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB56CAH, 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 P6SMB56CAH part is unused and in its original packaging.
Return procedure for P6SMB56CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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