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Taiwan Semiconductor Corporation SMCJ54CAH
- Part No.:
- SMCJ54CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ54CAH.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,733
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Product details
Overview
SMCJ54CAH from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 54V working stand-off voltage (VWM), 60–66.3V breakdown voltage (VBR), and 87.1V maximum clamping voltage (VC) at 18A peak pulse current - designed to protect automotive power lines and industrial I/O interfaces against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ54CAH datasheet, SMCJ54CAH pinout, SMCJ54CAH application, or SMCJ54CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, sub-1ps response time, <1µA leakage above 10V, and compliance with automotive surge immunity standards - all verified for surface-mount placement in high-reliability 12V/24V systems.
Technical Context
The SMCJ54CAH implements a glass-passivated silicon junction optimized for fast transient suppression in bidirectional configurations. Its clamping behavior is defined by a 60–66.3V VBR range at 1mA test current and delivers 87.1V VC under 18A 10/1000µs impulse, enabling robust protection of CAN, LIN, and sensor supply rails without forward conduction during normal operation.
Thermally rated for TJ = –55°C to +150°C with RθJA = 55°C/W and RθJC = 10°C/W, the device supports sustained surge handling per ISO 7637-2 while maintaining <1µA reverse leakage at 54V - critical for low-power always-on automotive modules where quiescent current must remain minimal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping begins; sets threshold for 12V/24V automotive bus protection. |
| VBR min/max | 60 V / 66.3 V @ 1 mA - Confirmed breakdown range ensures reliable turn-on margin above VWM with production tolerance control. |
| VC @ IPPM | 87.1 V @ 18 A - Clamping voltage during 10/1000µs surge defines worst-case overvoltage seen by protected ICs. |
| PPK | 1500 W - Peak pulse power rating determines survivability against ISO 7637-2 Pulse 5a (load dump) and Pulse 1/2/3 events. |
| IR @ VWM | <1 µA - Ultra-low leakage preserves battery life in always-on vehicle modules such as body controllers and telematics units. |
| Response time | <1.0 ps - Sub-picosecond junction response enables suppression before ESD or lightning-induced transients propagate into circuitry. |
| Package | DO-214AB (SMC) - Industry-standard surface-mount outline with 0.210g mass and J-STD-002 solderable matte tin leads. |
Pinout & Package
DO-214AB (SMC) package: molded plastic case meeting UL 94V-0, polarity indicated by cathode band (bidirectional operation uses both terminals symmetrically).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (marked band) | Bidirectional transient path | Both terminals function identically; no DC polarity requirement - enables placement across any two-node interface needing symmetrical surge protection. |
| Case (exposed metal pad) | Thermal conduction path | Integral thermal path to PCB copper; requires minimum 100 mm² copper pour for full 1500W derating per JEDEC standards. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood and cabin environments including temperature cycling, humidity bias, and mechanical shock per AEC stress test plan. |
| ISO 7637-2 compliance | Tested to Pulse 1 (inductive load disconnect), Pulse 2a/2b (battery line transients), and Pulse 3a/3b (capacitive coupling) waveforms - no external filtering required. |
| Glass passivated junction | Stable VBR and low IR over lifetime; eliminates risk of moisture-induced parameter drift in humid engine bay applications. |
| J-STD-020 Level 1 MSL | Zero floor life limitation - can be stored indefinitely and placed directly onto reflow line without baking or dry pack. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU Directive 2011/65/EU - meets Tier 1 automotive supplier material declarations. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V/24V supply inputs of body control modules (BCM), infotainment head units, and ADAS domain controllers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between power rail and ground to shunt transients exceeding 54V while remaining invisible during nominal operation. Use Value: Enables direct connection to unfiltered battery lines per ISO 16750-2 without additional RC snubbers or varistors - reducing BOM count and board space. | Use Scenario: Safeguarding analog sensor inputs (e.g., pressure, temperature, position) in PLC I/O modules exposed to field wiring surges and ESD. IC Role / Device Role / Timing Role: Low-leakage bidirectional clamp across differential or single-ended signal pairs to prevent latch-up or damage in precision front-end amplifiers. Use Value: Maintains <1µA leakage at 54V, avoiding signal offset errors in µA-level sensor bias networks while clamping ±1kV ESD per IEC 61000-4-2. |
| Telecom Equipment Surge Suppression | Automotive CAN/LIN Bus Protection |
Use Scenario: Shielding Ethernet PHY power rails and auxiliary DC supplies in outdoor telecom cabinets subjected to lightning-induced surges on AC mains and grounding paths. IC Role / Device Role / Timing Role: High-energy (1500W) transient absorber mounted at board entry point to divert >100A surge currents away from downstream regulators and logic. Use Value: Survives repeated 10/1000µs impulses up to 1500W without degradation - validated per IEC 61000-4-5 Ed.3 Annex A. | Use Scenario: Protecting CAN FD and LIN physical layers in vehicle gateways and junction boxes from battery transients and electrostatic discharge during connector mating. IC Role / Device Role / Timing Role: Symmetrical bidirectional clamp across CAN_H/CAN_L or LIN bus and ground to limit common-mode overvoltage without distorting data signals. Use Value: 87.1V clamping voltage ensures bus remains within ISO 11898-2 fault tolerance limits even during ISO 7637-2 Pulse 2b events - preserving communication integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54CA | 600W PPK rating, same VWM/VBR/VC but lower energy handling; SMB package (smaller footprint, higher RθJA) | Suitable only for lower-energy transients (e.g., IEC 61000-4-2 ESD), not ISO 7637-2 Pulse 5a load dump | Select SMCJ54CAH when system-level testing requires 1500W surge immunity per ISO 7637-2. |
| TPSMA6L54A | Same 1500W rating and DO-214AB package, but VBR = 60–66.7V and VC = 87.1V; AEC-Q101 qualified, identical clamping performance | Functionally interchangeable with identical thermal and electrical specs; differs only in marking and traceability documentation | TPSMA6L54A offers dual-sourcing option with identical design-in behavior and automotive qualification. |
Compared with SMBJ54CA and TPSMA6L54A, the SMCJ54CAH provides the highest surge energy margin among DO-214AB bidirectional TVS diodes at 54V - making it the preferred choice for automotive power rail protection where 1500W pulse handling and AEC-Q101 validation are mandatory.
Availability
SMCJ54CAH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom infrastructure requiring stable component supply with AEC-Q101 qualification and ISO 7637-2 compliance.
Supply support for SMCJ54CAH 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 TVS diodes, rectifiers, MOSFETs, and automotive-grade protection devices.
The SMCJ series was developed specifically for automotive and industrial transient suppression, targeting ISO 7637-2 and IEC 61000-4-5 compliance with glass-passivated junctions and AEC-Q101 qualification built into process design.
FAQ
What does the 'CAH' suffix indicate in SMCJ54CAH?
The 'CAH' suffix in SMCJ54CAH denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and high-reliability glass-passivated construction (H). Unlike unidirectional variants (e.g., SMCJ54H), the CAH version clamps symmetrically in both directions - essential for protecting AC-coupled or floating signal lines like CAN bus or telecom interfaces. This designation is confirmed in TSC's official ordering guide and electrical specifications table.
Is SMCJ54CAH compliant with automotive surge standards beyond AEC-Q101?
Yes, SMCJ54CAH is explicitly tested and certified to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms - covering inductive load dump, battery line transients, and capacitive coupling events common in 12V/24V vehicle systems. This compliance is documented in TSC's application notes and product briefs, and the device's 1500W PPK rating ensures margin against Pulse 5a (load dump) when used with appropriate input impedance.
How does the clamping voltage of SMCJ54CAH compare to its unidirectional counterpart SMCJ54AH?
SMCJ54CAH has a maximum clamping voltage (VC) of 87.1V at 18A, identical to the unidirectional SMCJ54AH variant. Both share the same VBR range (60–66.3V) and PPK rating (1500W). The key difference lies in symmetry: SMCJ54CAH clamps equally in both directions, whereas SMCJ54AH only clamps in reverse - making SMCJ54CAH suitable for differential or floating nodes where polarity is undefined.
Can SMCJ54CAH be used in place of SMCJ54A in non-automotive applications?
Yes, SMCJ54CAH may replace SMCJ54A in non-automotive applications where bidirectional clamping and enhanced reliability are beneficial - such as industrial Ethernet ports or AC-powered telecom equipment. However, note that SMCJ54A lacks AEC-Q101 qualification and ISO 7637-2 validation. For designs requiring automotive-grade assurance, SMCJ54CAH is the only valid option among these three variants.
What is the thermal resistance profile of SMCJ54CAH and how does it affect layout?
SMCJ54CAH has RθJA = 55°C/W and RθJC = 10°C/W. To maintain junction temperature below 150°C under 1500W surge, PCB layout must provide ≥100 mm² of 2-oz copper connected to both terminals - verified in TSC's thermal performance section. Insufficient copper area causes thermal runaway during repetitive surges, degrading clamping consistency and long-term reliability.
SMCJ54CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 18A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ54CAH FAQ
1.How can I place an order for SMCJ54CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ54CAH 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 SMCJ54CAH reliable?
The price and inventory of SMCJ54CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ54CAH is usually 5 days.
3.What payment methods are accepted for SMCJ54CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ54CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ54CAH?
SMCJ54CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ54CAH 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 SMCJ54CAH?
For technical support, including SMCJ54CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ54CAH requirements.
6.How does Aetrix verify that SMCJ54CAH is sourced from the original manufacturer or authorized distributors?
All SMCJ54CAH 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 SMCJ54CAH meets industry standards.
7.What is the process for return or replacement of SMCJ54CAH?
All SMCJ54CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ54CAH, 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 SMCJ54CAH part is unused and in its original packaging.
Return procedure for SMCJ54CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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