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Taiwan Semiconductor Corporation SMCJ85CH
- Part No.:
- SMCJ85CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ85CH.pdf
- Description:
- 1500W, 104.7V, 10%, BIDIRECTIONA
- Quantity:
- Payment:
- Shipping:
Inventory:3,823
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Product details
Overview
SMCJ85CH from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, designed for automotive-grade surge protection with AEC-Q101 qualification, 85V working stand-off voltage, 94.4–115V breakdown range at 1mA, and 151V clamping voltage at 10.4A peak pulse current. It protects power rails and signal lines in vehicle ECUs against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ85CH datasheet, SMCJ85CH pinout, SMCJ85CH application, or SMCJ85CH equivalent, key selection criteria include clamping performance under 10/1000μs surge, bidirectional capability confirmation (CH suffix indicates bipolar configuration), thermal resistance (RθJC = 10°C/W), and compliance with automotive ESD immunity standards.
Technical Context
The SMCJ85CH is a bipolar TVS diode-confirmed by the "CH" suffix per manufacturer documentation-enabling symmetrical clamping in both directions without polarity dependency. Its glass-passivated junction ensures stable VBR and low leakage (<1µA at VWM), while the DO-214AB package supports automated placement and meets JESD201 Class 2 whisker resistance.
It delivers 1500W peak pulse power (tp = 1ms) with sub-1ps response time from 0V to VBR(min), and operates across –55°C to +150°C junction temperature. Thermal performance is defined by RθJA = 55°C/W and RθJC = 10°C/W, enabling reliable derating in high-ambient automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR @ IT = 1 mA | 94.4–115 V - Breakdown voltage range ensuring robust turn-on margin above VWM |
| VC @ IPPM = 10.4 A | 151 V - Clamped voltage during 10/1000μs surge, limiting downstream stress |
| PPK | 1500 W - Peak pulse power handling per single 1ms transient, per Fig.5 waveform |
| IR @ VWM | <1 µA - Ultra-low leakage preserves battery-critical standby current in always-on modules |
| TJ(max) | +150 °C - Enables operation in under-hood environments without thermal shutdown |
| RθJC | 10 °C/W - Supports efficient heat transfer to PCB copper when mounted with thermal pad |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, molded plastic case with matte tin-plated leads, UL 94V-0 rated, polarity marked by cathode band (unidirectional) or center band (bipolar). Weight ≈ 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Current entry terminal in forward bias | For bipolar operation, functions as either anode or cathode depending on transient polarity |
| Cathode (Lead 2) | Current exit terminal in forward bias | Marked with band; in bipolar mode, symmetrically clamps reverse surges across both terminals |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Glass-passivated junction | Ensures long-term VBR stability and low parameter drift over temperature and lifetime |
| Fast response <1 ps | Clamps transients before sensitive ICs experience overvoltage damage, critical for CAN/LIN bus protection |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly processes |
Applications
| Automotive Body Control Module (BCM) | Infotainment Power Supply Input |
|---|---|
Use Scenario: Protects 12V supply rail of BCM against load-dump transients during alternator regulation failure. IC Role / Device Role / Timing Role: Primary clamping device placed upstream of DC-DC converters and microcontrollers. Use Value: Limits voltage to ≤151V during 10/1000μs 1500W surge, preventing latch-up or gate oxide rupture in downstream PMICs. | Use Scenario: Shields USB-C PD and display power inputs in head units from ignition-switching noise and ESD events. IC Role / Device Role / Timing Role: Bidirectional transient suppressor on VBUS and auxiliary rails, leveraging CH symmetry. Use Value: Sub-1ps response ensures clamping occurs before ±8kV contact ESD pulses propagate into USB PHY or display driver ICs. |
| Industrial CAN Bus Node | Smart Lighting Driver Input Stage |
Use Scenario: Guards CAN transceiver VCC and common-mode lines against coupled surges in factory automation networks. IC Role / Device Role / Timing Role: Secondary-level protection aligned with ISO 11898-2 immunity requirements. Use Value: 151V clamping maintains CANH/CANL differential margin while surviving repetitive 100A surge tests per IEC 61000-4-5. | Use Scenario: Safeguards constant-current LED driver ICs from inductive kickback during dimming MOSFET switching. IC Role / Device Role / Timing Role: Parallel-connected TVS across input bulk capacitor to absorb stored energy. Use Value: 1500W peak power rating handles 100× rated surge energy without degradation, extending driver lifetime in streetlight applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85CA | 600W rating, SMB package (smaller footprint), higher RθJA = 85°C/W | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 or sustained load dump | Select only for space-constrained consumer-grade designs where 1500W is not required. |
| 1.5KE85CA | Through-hole DO-201 package, same 1500W rating, slower response (~1ns), no AEC-Q101 qualification | Not approved for automotive use; requires manual insertion; less suitable for automated production | Use only in industrial or legacy through-hole systems where reflow compatibility and automotive qualification are not mandatory. |
Compared with SMBJ85CA and 1.5KE85CA, the SMCJ85CH provides superior automotive readiness via AEC-Q101, tighter thermal management (RθJC = 10°C/W), and surface-mount scalability-making it the optimal choice for next-generation ECU and ADAS power protection.
Availability
SMCJ85CH is available at Aetrix Electronics and suitable for automotive electronic control units, infotainment power supplies, industrial CAN nodes, and smart lighting drivers requiring stable component supply across extended temperature and surge conditions.
Supply support for SMCJ85CH 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-qualified components.
The SMCJ series was developed specifically for high-reliability automotive and industrial transient suppression, emphasizing AEC-Q101 compliance, ISO 7637-2 immunity, and robust thermal performance in surface-mount packages.
FAQ
What does the "CH" suffix indicate in SMCJ85CH?
The "CH" suffix in SMCJ85CH denotes a bipolar (bidirectional) configuration, meaning the device clamps symmetrically for both positive and negative transients without polarity dependence. This is confirmed in the manufacturer's documentation, which states "For bidirectional use CH or CAH suffix for types SMCJ5.0H – types SMCJ170H" and specifies that electrical characteristics apply in both directions. The SMCJ85CH thus replaces two unidirectional devices in differential line protection.
Is SMCJ85CH AEC-Q101 qualified?
Yes, SMCJ85CH is explicitly AEC-Q101 qualified, as stated in the FEATURES section of the official datasheet. This qualification covers stress testing including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and ESD (HBM/MM). It validates suitability for automotive powertrain, chassis, and body electronics where reliability under harsh environmental conditions is mandatory.
What is the maximum clamping voltage of SMCJ85CH and at what current?
The maximum clamping voltage (VC) of SMCJ85CH is 151 V, measured at a peak pulse current (IPPM) of 10.4 A under the standardized 10/1000 μs double-exponential surge waveform per Fig.5. This value is specified in the ELECTRICAL SPECIFICATIONS table for SMCJ85H/SMCJ85AH variants and applies directly to SMCJ85CH as part of the same family with identical clamping performance.
Does SMCJ85CH meet ISO 7637-2 requirements?
Yes, SMCJ85CH meets ISO 7637-2 requirements for automotive transient immunity, specifically Pulses 1 (inductive load dump), 2a/2b (supply interruption and switching), and 3a/3b (capacitive coupling and line impedance). This compliance is explicitly listed under FEATURES and validated by its 1500W peak pulse rating and clamping behavior under standardized test waveforms defined in the standard.
What is the thermal resistance from junction to case (RθJC) for SMCJ85CH?
The junction-to-case thermal resistance (RθJC) for SMCJ85CH is 10°C/W, as published in the THERMAL PERFORMANCE section of the datasheet. This value enables effective heat conduction from the silicon die to the PCB copper via the cathode/anode leads and is critical for maintaining TJ ≤ 150°C in high-power surge events, especially when mounted on thermally enhanced pads.
SMCJ85CH 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):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 151V
- Current - Peak Pulse (10/1000µs):
- 10.4A
- 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)
SMCJ85CH FAQ
1.How can I place an order for SMCJ85CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ85CH 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 SMCJ85CH reliable?
The price and inventory of SMCJ85CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ85CH is usually 5 days.
3.What payment methods are accepted for SMCJ85CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ85CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ85CH?
SMCJ85CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ85CH 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 SMCJ85CH?
For technical support, including SMCJ85CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ85CH requirements.
6.How does Aetrix verify that SMCJ85CH is sourced from the original manufacturer or authorized distributors?
All SMCJ85CH 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 SMCJ85CH meets industry standards.
7.What is the process for return or replacement of SMCJ85CH?
All SMCJ85CH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ85CH, 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 SMCJ85CH part is unused and in its original packaging.
Return procedure for SMCJ85CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ85CH Tags
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