My Inquiry
My Account
Taiwan Semiconductor Corporation SMCJ64AH
- Part No.:
- SMCJ64AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ64AH.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,186
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ64AH from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) in DO-214AB (SMC) package, with 64V working stand-off voltage (VWM), 71.1–78.6V breakdown voltage (VBR), and 103V maximum clamping voltage (VC) at 15A peak pulse current. It protects automotive power electronics and industrial control inputs against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ64AH datasheet, SMCJ64AH pinout, SMCJ64AH application, or SMCJ64AH equivalent, key selection criteria include clamping performance under 10/1000μs surge, AEC-Q101 qualification for automotive use, unidirectional polarity marking, and thermal resistance (RθJC = 10°C/W) for PCB-level thermal management.
Technical Context
The SMCJ64AH uses a glass-passivated silicon junction optimized for fast transient response (<1.0ps rise from 0V to VBR min) and low leakage (<1μA at 64V). Its unidirectional configuration enables asymmetric protection in DC power rails where reverse conduction must be blocked.
Designed for compliance with ISO 7637-2 test pulses, it sustains 15A peak impulse current (IPPM) at 10/1000μs waveform while limiting clamped voltage to ≤103V - critical for safeguarding 75V-rated downstream ICs such as CAN transceivers and microcontroller I/Os.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system rail margin. |
| VBR min/max | 71.1 V / 78.6 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold tolerance. |
| VC @ IPPM | 103 V @ 15 A - Clamped voltage during 10/1000μs surge; determines maximum stress on protected circuitry. |
| PPK | 1500 W - Peak pulse power handling capability; validates robustness against high-energy transients. |
| RθJC | 10 °C/W - Junction-to-case thermal resistance; enables accurate thermal design when mounted on copper pour. |
| IR @ VWM | <1 μA - Reverse leakage at rated stand-off voltage; ensures minimal standby power loss in battery-critical systems. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, polarity indicated by cathode band. Weight: 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode reference for unidirectional clamping | Connected to system ground or lower-potential node; blocks reverse current above VWM. |
| Anode (non-banded end) | Transient current sink path | Connected to protected line (e.g., 12V/24V rail); conducts surge energy to ground during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD22 standards. |
| Glass passivated junction | Ensures stable VBR over time and environmental stress, eliminating risk of parameter drift due to moisture ingress. |
| ISO 7637-2 compliance | Guarantees immunity to real-world vehicle electrical disturbances including load dump, alternator ripple, and inductive switching noise. |
| Fast response time <1.0 ps | Clamps before sensitive logic or analog circuits experience damaging overvoltage - critical for protecting CAN FD and LIN bus interfaces. |
| Moisture sensitivity level 1 | Eliminates need for dry-packaging or baking prior to reflow; compatible with standard SMT assembly lines. |
Applications
| Automotive Power Distribution | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 24V supply lines feeding engine control units (ECUs) and body control modules (BCMs) against load-dump transients up to 120V. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground to clamp surges before they reach LDOs and microcontrollers. Use Value: Limits clamped voltage to 103V, ensuring downstream 75V-rated regulators remain within safe operating area during ISO 7637-2 Pulse 5a events. | Use Scenario: Shielding digital input channels of programmable logic controllers (PLCs) from field-induced surges caused by relay coil de-energization or lightning coupling. IC Role / Device Role / Timing Role: Standoff protector on 24V discrete input terminals, absorbing 15A 10/1000μs pulses without degradation. Use Value: Maintains <1μA leakage at 24V nominal, preventing false triggering of optocoupled inputs while surviving repeated 1500W transients. |
| Telecom DC Power Feeds | Motor Drive Control Signal Lines |
Use Scenario: Safeguarding -48V telecom rectifier outputs and backplane power buses from ESD and hot-swap induced transients. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; SMCJ64AH deployed in unidirectional mode on negative-rail side to block reverse surge propagation. Use Value: With VWM = 64V, provides 16V headroom above |−48V| rail, enabling reliable clamping without false triggering during normal operation. | Use Scenario: Protecting isolated gate driver enable signals (e.g., 15V logic lines) in three-phase inverter control boards from cross-talk and Miller-induced spikes. IC Role / Device Role / Timing Role: Localized TVS placed adjacent to gate driver IC input pins to shunt sub-microsecond transients before propagation into CMOS logic. Use Value: Sub-1ps response ensures clamping initiates before 15V-tolerant inputs exceed absolute maximum ratings, preserving signal integrity in high-dV/dt motor drive environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | Lower PPK (600W), same VWM/VBR/VC specs, SMB package (smaller footprint, higher RθJA). | Not suitable for 1500W ISO 7637-2 Pulse 5a; limited to lower-energy transients like ESD or data-line surges. | Select only if system-level surge energy is confirmed ≤600W and board space constraints prohibit SMC package. |
| SMCJ64A | Same PPK and package, but non-AEC-Q101; VBR tighter (71.1–73.7V vs. 71.1–78.6V); no ISO 7637-2 validation. | Lacks automotive qualification and standardized transient immunity testing; acceptable for industrial/commercial use only. | Choose when AEC-Q101 and ISO 7637-2 compliance are not required, and tighter VBR tolerance is preferred. |
Compared with SMCJ64A and SMBJ64A, the SMCJ64AH delivers certified automotive robustness, full 1500W surge capacity in the SMC form factor, and guaranteed ISO 7637-2 immunity - making it the sole option for safety-critical 24V/48V vehicle subsystems requiring zero derating under worst-case transients.
Availability
SMCJ64AH is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, and telecom power distribution systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMCJ64AH 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, and power MOSFETs since 1979.
The SMCJ series was developed specifically for high-reliability automotive and industrial transient suppression, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in surface-mount packages.
FAQ
What is the clamping voltage of the SMCJ64AH under a 10/1000μs surge?
The SMCJ64AH has a maximum clamping voltage (VC) of 103 V when subjected to a 15 A peak pulse current with a 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits see no more than 103 V during standardized surge events - critical for compatibility with 75 V-rated downstream components. The SMCJ64AH maintains this clamping performance across its full operating temperature range.
Is the SMCJ64AH suitable for bidirectional transient protection?
No, the SMCJ64AH is a unidirectional TVS diode, designed for DC power rail protection where reverse conduction must be blocked. For bidirectional applications such as AC lines or data buses, TSC offers the SMCJ64CAH variant with CH or CAH suffix. The SMCJ64AH's cathode band marking and forward voltage specification (VF = 5.0 V @ 100 A) confirm its unidirectional architecture - using it in reverse-biased AC configurations would result in unintended conduction.
Does the SMCJ64AH require special handling during PCB assembly?
No, the SMCJ64AH has Moisture Sensitivity Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and processed through standard lead-free reflow profiles without baking or dry packing. Its matte tin-plated leads comply with J-STD-002 for solderability, and the DO-214AB package is fully compatible with automated pick-and-place equipment - eliminating process overhead for high-volume SMT manufacturing.
How does the SMCJ64AH meet automotive reliability requirements?
The SMCJ64AH is AEC-Q101 qualified, having passed stress tests including temperature cycling (−55°C to +150°C), highly accelerated stress testing (HAST), and mechanical shock. It also meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b for automotive electrical disturbance immunity. These qualifications are verified per TSC's A2102 revision and documented in official certification reports - confirming the SMCJ64AH's suitability for under-hood and chassis-mounted automotive modules.
What is the thermal resistance from junction to case for the SMCJ64AH?
The SMCJ64AH has a junction-to-case thermal resistance (RθJC) of 10°C/W, measured under standard mounting conditions on 1-inch² 2-oz copper. This low value enables effective heat transfer to the PCB, supporting sustained operation at elevated ambient temperatures. When designing thermal relief, engineers should ensure adequate copper pour beneath the cathode/anode pads and consider RθJA = 55°C/W for system-level ambient-to-junction modeling - both values are specified in the SMCJ64AH's thermal performance table.
SMCJ64AH 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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 15A
- 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)
SMCJ64AH FAQ
1.How can I place an order for SMCJ64AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ64AH 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 SMCJ64AH reliable?
The price and inventory of SMCJ64AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ64AH is usually 5 days.
3.What payment methods are accepted for SMCJ64AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ64AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ64AH?
SMCJ64AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ64AH 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 SMCJ64AH?
For technical support, including SMCJ64AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ64AH requirements.
6.How does Aetrix verify that SMCJ64AH is sourced from the original manufacturer or authorized distributors?
All SMCJ64AH 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 SMCJ64AH meets industry standards.
7.What is the process for return or replacement of SMCJ64AH?
All SMCJ64AH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ64AH, 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 SMCJ64AH part is unused and in its original packaging.
Return procedure for SMCJ64AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ64AH Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
