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Taiwan Semiconductor Corporation SMCJ15AH
- Part No.:
- SMCJ15AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ15AH.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,096
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Product details
Overview
SMCJ15AH from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, featuring 16.7V minimum breakdown voltage (VBR), 15V working stand-off voltage (VWM), and 24.4V maximum clamping voltage (VC) at 64A peak pulse current - designed for automotive-grade ESD and load-dump protection in power supply inputs and data line interfaces.
For engineers reviewing the SMCJ15AH datasheet, SMCJ15AH pinout, SMCJ15AH application, or SMCJ15AH equivalent, this device delivers AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, <1μA reverse leakage above 10V, and robust thermal performance (RθJC = 10°C/W) - critical for high-reliability industrial and automotive electronics.
Technical Context
The SMCJ15AH operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast clamping of transients induced by load switching, ESD, and lightning surges. Its 1500W peak pulse power rating (tp = 1ms) and 64A maximum peak impulse current (IPPM) are defined per the 10/1000μs waveform per R.E.A., with clamping voltage tightly controlled at 24.4V under full surge conditions.
Thermally, it supports continuous operation up to +150°C junction temperature, with RθJA = 55°C/W and RθJC = 10°C/W enabling effective heat transfer in compact PCB layouts. Polarity is marked via cathode band, and terminals are matte tin-plated for J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum DC or continuous reverse operating voltage before conduction begins; defines safe operating margin below breakdown. |
| VBR min / max | 16.7 V / 18.5 V @ IT = 1 mA - Verified avalanche onset range; ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 24.4 V @ 64 A - Clamped voltage during full-rated 1500W surge; determines maximum stress imposed on downstream circuitry. |
| PPK | 1500 W - Peak pulse power handling per 1ms 10/1000μs waveform; enables protection against severe automotive load-dump events. |
| IR @ VWM | <1 μA - Ultra-low reverse leakage at rated stand-off voltage; minimizes standby power loss and signal integrity impact. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures. |
Pinout & Package
Package: DO-214AB (SMC) - Surface-mount plastic case with matte tin-plated leads, UL 94V-0 molding compound, polarity indicated by cathode band, weight ≈ 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (cathode-banded side is cathode) | Connected to system ground or low-side reference; reverse-biased during normal operation. |
| Cathode | Protected line connection (marked with band) | Connected to the line being protected (e.g., 12V rail); conducts avalanche current to ground during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including temperature cycling, humidity bias, and mechanical shock per stress test requirements. |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) waveforms - essential for 12V/24V vehicle systems. |
| Glass passivated junction | Enhances long-term reliability and stability of VBR and leakage under thermal and humidity stress versus epoxy-passivated alternatives. |
| Fast response time | <1.0 ps from 0 V to VBR min - Enables clamping before sensitive ICs experience damaging overvoltage. |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement prior to reflow; compatible with standard SMT assembly processes without special handling. |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12V battery-fed ECUs exposed to load-dump transients up to ±125V per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp surges before they reach DC-DC converters and microcontrollers. Use Value: Limits peak voltage to 24.4V during 64A transients, preventing damage to 36V-rated input stages while maintaining AEC-Q101 reliability. |
Use Scenario: 24V digital input modules in factory automation subject to inductive kickback from solenoid drivers and relay coils. IC Role / Device Role / Timing Role: Standoff protection on isolated input channels, absorbing repetitive 1500W pulses without degradation. Use Value: With 1μA leakage at 15V, it avoids false triggering in high-impedance sensing circuits while delivering sub-nanosecond response. |
| Telecom Line Interface Protection | Consumer Power Adapter Surge Suppression |
Use Scenario: RS-485 transceivers in outdoor base stations subjected to lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Primary-level TVS on differential bus lines, coordinated with GDTs and common-mode chokes in multi-stage protection schemes. Use Value: 24.4V clamping ensures transceiver I/O remains within absolute maximum ratings even during 10/1000μs surges exceeding 1kV. |
Use Scenario: Secondary-side DC output of wall adapters powering USB-C PD devices, requiring robustness against AC-line coupled transients. IC Role / Device Role / Timing Role: Final-stage clamping device across +5V/9V/15V outputs to prevent overvoltage damage to connected end equipment. Use Value: RoHS- and halogen-free construction meets global regulatory requirements, while DO-214AB footprint enables automated placement in high-volume manufacturing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15AH (Taiwan Semiconductor) | Lower peak power rating (600W vs. 1500W); same VWM/VBR/VC specs but in smaller SMB (DO-214AA) package. | Not suitable for automotive load-dump or high-energy industrial surges; limited to lower-energy ESD and signal-line protection. | Select SMCJ15AH when 1500W surge capability and DO-214AB thermal mass are required; choose SMBJ15AH only for space-constrained, low-energy applications. |
| 1.5SMC15AH (ON Semiconductor) | Identical electrical specs (VWM = 15V, VBR = 16.7–18.5V, VC = 24.4V @ 64A) and DO-214AB package; AEC-Q101 qualified and ISO 7637-2 compliant. | Drop-in replacement with identical pinout, thermal profile, and automotive qualification - validated for same use cases. | 1.5SMC15AH offers second-source availability with identical performance; preferred when dual-sourcing or lifecycle continuity is required alongside SMCJ15AH. |
Compared with SMBJ15AH, SMCJ15AH provides 2.5× higher surge energy handling and superior thermal dissipation; compared with 1.5SMC15AH, it shares identical clamping behavior and automotive qualification but differs in branding and traceability - both are functionally interchangeable in AEC-Q101 designs.
Availability
SMCJ15AH is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, telecom infrastructure interfaces, and consumer power adapter designs requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for SMCJ15AH 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 power management components.
The SMCJ series is part of TSC's AEC-Q101-qualified transient suppression portfolio, engineered specifically for automotive and industrial environments demanding high-energy clamping, fast response, and long-term reliability under thermal and mechanical stress.
FAQ
What is the clamping voltage of SMCJ15AH and how is it measured?
The SMCJ15AH has a maximum clamping voltage (VC) of 24.4 V, measured at 64 A peak pulse current (IPPM) using the standardized 10/1000 μs double-exponential waveform per R.E.A. This value represents the highest voltage the device allows across its terminals during a full-rated 1500W transient event - a critical parameter for ensuring downstream ICs remain within their absolute maximum voltage ratings. The SMCJ15AH consistently achieves this clamping performance across its qualified operating temperature range.
Is SMCJ15AH suitable for bidirectional transient protection?
No, SMCJ15AH is a unidirectional TVS diode intended for DC line protection where polarity is fixed - such as 12V or 24V power rails. For bidirectional applications like AC lines or data buses, Taiwan Semiconductor specifies the SMCJ15CAH variant (with "CAH" suffix), which features symmetrical breakdown in both directions. Using SMCJ15AH in reverse-biased configurations risks permanent damage due to lack of reverse avalanche capability.
Does SMCJ15AH require derating at elevated ambient temperatures?
Yes, the SMCJ15AH must be derated above 25°C ambient per the pulse derating curve in Figure 2 of its datasheet. At 85°C ambient, its 1500W peak pulse power rating reduces to approximately 900W; at 125°C, it falls to ~500W. This derating is directly tied to junction temperature limits (TJ ≤ 150°C) and thermal resistance (RθJA = 55°C/W). Proper PCB copper area and airflow must be accounted for in thermal design when deploying SMCJ15AH in high-temperature environments.
What marking code identifies SMCJ15AH on the device body?
The SMCJ15AH is marked with the code "GEM" on its DO-214AB (SMC) package body, per Taiwan Semiconductor's ordering documentation. This 3-character laser marking appears adjacent to the cathode band and is used for traceability and visual verification during assembly and inspection. The "G" prefix denotes green molding compound, and "EM" uniquely identifies the 15V unidirectional variant within the SMCJ(A)H family.
How does SMCJ15AH meet ISO 7637-2 for automotive applications?
The SMCJ15AH is explicitly tested and certified to meet ISO 7637-2 for Pulses 1 (inductive switch-off), 2a/2b (supply interruption and line drop), and 3a/3b (capacitive coupling and ignition noise), as stated in its official datasheet. Its 24.4V clamping voltage at 64A ensures compliance with Pulse 1's 125V/30Ω requirement and Pulse 5a's load-dump profile - making it suitable for front-end protection in automotive ECUs, body control modules, and infotainment systems without additional external components.
SMCJ15AH 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 64A
- 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)
SMCJ15AH FAQ
1.How can I place an order for SMCJ15AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ15AH 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 SMCJ15AH reliable?
The price and inventory of SMCJ15AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ15AH is usually 5 days.
3.What payment methods are accepted for SMCJ15AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ15AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ15AH?
SMCJ15AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ15AH 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 SMCJ15AH?
For technical support, including SMCJ15AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ15AH requirements.
6.How does Aetrix verify that SMCJ15AH is sourced from the original manufacturer or authorized distributors?
All SMCJ15AH 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 SMCJ15AH meets industry standards.
7.What is the process for return or replacement of SMCJ15AH?
All SMCJ15AH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ15AH, 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 SMCJ15AH part is unused and in its original packaging.
Return procedure for SMCJ15AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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