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Taiwan Semiconductor Corporation SMCJ15H
- Part No.:
- SMCJ15H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ15H.pdf
- Description:
- 1500W, 18.6V, 10%, UNIDIRECTIONA
- Quantity:
- Payment:
- Shipping:
Inventory:7,521
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Product details
Overview
SMCJ15H from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, designed for high-energy surge protection in automotive and industrial power rails. It features a 16.7–20.4 V breakdown voltage (VBR), 15 V working stand-off voltage (VWM), 26.9 V maximum clamping voltage (VC) at 58 A peak pulse current, and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the SMCJ15H datasheet, SMCJ15H pinout, SMCJ15H application, or SMCJ15H equivalent, this device is selected for robust ESD and load-dump immunity in 12 V DC systems where fast response (<1 ps), low leakage (<1 µA @ 15 V), and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance are critical.
Technical Context
The SMCJ15H operates as a unidirectional avalanche diode with glass-passivated junction, enabling stable clamping during fast transients. Its thermal design supports 150 °C max junction temperature and 10 °C/W junction-to-case resistance, allowing reliable operation under repeated surge stress in compact PCB layouts.
It meets ISO 7637-2 test requirements for automotive electronics, including Pulse 1 (inductive load dump), Pulse 2a (battery disconnect), Pulse 2b (alternator load dump), and Pulse 3a/3b (capacitive coupling and ignition noise), with clamping performance validated at 10/1000 µs waveform per REA standard.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin for 12 V nominal systems. |
| VBR min/max | 16.7 V / 20.4 V - Breakdown occurs within this range at 1 mA test current; ensures consistent turn-on across production lot. |
| VC @ IPPM | 26.9 V - Clamps 58 A 10/1000 µs surge to ≤26.9 V, limiting downstream IC stress to safe levels in automotive ECUs. |
| PPK | 1500 W - Peak pulse power rating at TA = 25 °C; derates linearly above 25 °C per published curve (RθJA = 55 °C/W). |
| IR @ VWM | <1 µA - Ultra-low reverse leakage at rated stand-off voltage; prevents battery drain in always-on vehicle modules. |
| TJ max | 150 °C - Maximum junction temperature; enables placement near heat sources like power MOSFETs without thermal runaway risk. |
Pinout & Package
DO-214AB (SMC) surface-mount package with matte tin-plated leads, polarity indicated by cathode band. Case meets UL 94V-0 flammability rating and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; forms clamping loop with cathode on protected line. |
| Cathode | Protected line connection | Connected to 12 V rail or signal line; conducts surge current to anode when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability under humidity and thermal stress. |
| ISO 7637-2 compliance | Guarantees functional immunity to standardized automotive transients without external circuit modification. |
| Fast response time <1 ps | Clamps ESD events before sensitive logic or analog circuits experience overvoltage damage. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protecting microcontroller GPIOs and CAN transceivers from load dump and alternator ripple in BCM power distribution. IC Role / Device Role / Timing Role: Unidirectional TVS clamp on 12 V supply rail upstream of LDO regulators. Use Value: Limits transient overshoot to ≤26.9 V, preventing latch-up or permanent damage to 3.3 V/5 V logic interfaces. | Use Scenario: Safeguarding 24 V digital input channels against field-wiring surges and inductive kickback in factory automation controllers. IC Role / Device Role / Timing Role: Primary surge suppression element on DIN-rail mounted I/O module front-end. Use Value: Absorbs 1500 W pulses without degradation, maintaining signal integrity during repetitive 24 V solenoid switching. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive |
Use Scenario: Guarding AC/DC adapter primary-side rectifier output against lightning-induced surges on telecom infrastructure equipment. IC Role / Device Role / Timing Role: Secondary-side TVS on bulk capacitor node to suppress differential-mode transients. Use Value: Clamps 10/1000 µs surges to 26.9 V while sustaining <1 µA leakage at 15 V, minimizing standby power loss. | Use Scenario: Shielding BLDC motor driver gate drivers from back-EMF spikes during commutation in smart home appliances. IC Role / Device Role / Timing Role: Localized TVS on half-bridge high-side source node. Use Value: Responds in <1 ps to limit gate-source overvoltage, preserving MOSFET reliability over 10,000+ operational cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A | 600 W PPK, SMB package (smaller footprint), higher VC = 24.4 V @ 30 A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 or 2b | Select only for space-constrained consumer designs with <600 W surge exposure. |
| TPSMA6L15A | 600 W PPK, same DO-214AC (SMA) package, VC = 24.4 V @ 24.7 A, AEC-Q101 qualified | Lower clamping energy handling; not validated for full ISO 7637-2 Pulse suite | Prefer for cost-sensitive automotive infotainment where full load-dump immunity is not required. |
Compared with SMCJ15H, SMBJ15A and TPSMA6L15A offer smaller footprints but deliver only 600 W peak power-insufficient for full automotive load-dump protection. The SMCJ15H remains the only option among the three with verified 1500 W capability, DO-214AB thermal robustness, and complete ISO 7637-2 compliance.
Availability
SMCJ15H is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC inputs, telecom power supplies, and consumer appliance motor drives requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for SMCJ15H 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 Taiwanese manufacturer specializing in discrete power semiconductors, TVS diodes, and rectifiers for automotive, industrial, and consumer markets.
The SMCJ series was developed specifically for high-reliability transient suppression in harsh environments, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in surface-mount packages.
FAQ
What is the clamping voltage of SMCJ15H at its rated peak pulse current?
The SMCJ15H has a maximum clamping voltage (VC) of 26.9 V at 58 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for downstream components in 12 V systems. The SMCJ15H maintains this clamping performance across its full operating temperature range.
Is SMCJ15H unidirectional or bidirectional, and how is polarity marked?
The SMCJ15H is a unidirectional TVS diode, with polarity indicated by a cathode band on the DO-214AB (SMC) package body. The cathode connects to the protected line (e.g., 12 V rail), and the anode connects to ground. Bidirectional variants use CH or CAH suffixes (e.g., SMCJ15CH); the SMCJ15H is strictly unidirectional and must be oriented correctly in-circuit.
Does SMCJ15H meet automotive qualification standards?
Yes, the SMCJ15H is AEC-Q101 qualified and explicitly validated for ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity. Its construction-including glass-passivated junction, JESD201 Class 2 whisker resistance, and moisture sensitivity level 1-supports deployment in under-hood automotive ECUs and body control modules per TSC documentation.
What is the maximum steady-state power dissipation for SMCJ15H?
The SMCJ15H has a steady-state power dissipation (PD) rating of 5 W at TA = 25 °C. This value reflects continuous DC power handling capability-not surge rating-and is limited by thermal resistance (RθJA = 55 °C/W). In practice, the SMCJ15H is used for transient suppression only; sustained forward conduction would exceed safe junction temperature limits.
How does SMCJ15H compare to SMCJ15AH in terms of breakdown voltage tolerance?
The SMCJ15H has a VBR range of 16.7–20.4 V (min/max), while the SMCJ15AH variant tightens this to 16.7–18.5 V. This narrower tolerance improves consistency in clamping onset across production units, making SMCJ15AH preferable for precision-sensitive applications. Both share identical package, power rating, and clamping voltage (26.9 V / 24.4 V respectively), but only SMCJ15H appears in the base family designation referenced in the provided datasheet excerpt.
SMCJ15H 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:
- 26.9V
- Current - Peak Pulse (10/1000µs):
- 58A
- 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)
SMCJ15H FAQ
1.How can I place an order for SMCJ15H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ15H 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 SMCJ15H reliable?
The price and inventory of SMCJ15H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ15H is usually 5 days.
3.What payment methods are accepted for SMCJ15H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ15H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ15H?
SMCJ15H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ15H 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 SMCJ15H?
For technical support, including SMCJ15H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ15H requirements.
6.How does Aetrix verify that SMCJ15H is sourced from the original manufacturer or authorized distributors?
All SMCJ15H 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 SMCJ15H meets industry standards.
7.What is the process for return or replacement of SMCJ15H?
All SMCJ15H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ15H, 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 SMCJ15H part is unused and in its original packaging.
Return procedure for SMCJ15H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ15H Tags
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