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Taiwan Semiconductor Corporation SMDJ90A
- Part No.:
- SMDJ90A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ90A.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,231
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Product details
Overview
SMDJ90A from Taiwan Semiconductor is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 90V working stand-off voltage (VWM), 100–111V breakdown voltage (VBR), and 146V maximum clamping voltage (VC) at 20.5A peak pulse current - designed for robust ESD and lightning surge protection in telecom power rails and industrial I/O interfaces.
For engineers reviewing the SMDJ90A datasheet, SMDJ90A pinout, SMDJ90A application, or SMDJ90A equivalent, key selection criteria include clamping performance under 10/1000µs transients, thermal resistance (RθJA = 75°C/W), forward voltage (VF = 3.5V @ 100A), compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b, and DO-214AB mechanical compatibility with automated SMT placement.
Technical Context
The SMDJ90A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 100–111V breakdown range (VBR), clamping transients to ≤146V at 20.5A (IPPM). Its glass-passivated junction ensures stable VBR tolerance and fast response (<1.0ps).
Thermally, it supports continuous operation up to TJ = 175°C with RθJL = 15°C/W to lead and RθJA = 75°C/W to ambient; steady-state power dissipation is 6.5W at 25°C, derated linearly above that temperature per Fig.2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 100 V / 111 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold |
| VC @ IPPM | 146 V - Clamped voltage at 20.5 A peak pulse current (10/1000 µs waveform), limiting stress on downstream ICs |
| PPK | 3000 W - Peak pulse power handling capability under standardized 1 ms transient, critical for automotive load-dump immunity |
| VF @ 100A | 3.5 V - Forward voltage drop during high-current surge conduction; impacts power loss and thermal design |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; determines required PCB copper area for thermal management |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with cathode band marking; compatible with J-STD-020 Level 1 moisture sensitivity |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (unidirectional only); weight ≈ 0.290 g; UL 94V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; completes conduction path during reverse transient |
| Cathode | High-side transient input | Connected to protected line (e.g., 48V telecom supply); blocks normal operation but conducts during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress |
| ISO 7637-2 compliance | Validated for automotive electrical system transients (Pulse 1, 2a, 2b, 3a, 3b), enabling use in vehicle ECUs and gateways |
| Fast response time | <1.0 ps - Limits voltage overshoot before clamping engages, protecting sensitive analog front-ends |
| Moisture sensitivity level 1 | No bake requirement prior to reflow; supports standard SMT assembly without special handling |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS directives for environmentally constrained applications |
Applications
| Telecom Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 48V DC power inputs in base station radios and optical line terminals from lightning-induced surges and ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between +48V rail and chassis ground to clamp transients before they reach DC-DC converters. Use Value: Clamps 3000W transients to ≤146V, preserving downstream converter input stage integrity while meeting Telcordia GR-1089-CORE requirements. | Use Scenario: Shielding 24V digital input channels in programmable logic controllers from inductive kickback and field-wiring ESD. IC Role / Device Role / Timing Role: Standoff protector on each isolated input channel, absorbing energy from relay coil de-energization and cable discharge events. Use Value: Withstands 20.5A peak pulses (10/1000µs) and maintains <1 µA leakage at 90V, ensuring signal integrity and low false-trigger risk. |
| Automotive Body Control Module (BCM) | Smart Meter Power Supply Protection |
Use Scenario: Safeguarding 12V/24V power distribution networks in BCMs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Primary clamping device on main battery feed, coordinated with upstream fuses and secondary filtering. Use Value: Meets ISO 7637-2 Pulse 5a (load dump) with 146V clamping, preventing latch-up or burnout of microcontroller power supplies. | Use Scenario: Securing AC/DC and DC/DC stages in utility smart meters exposed to grid surges and meter tampering events. IC Role / Device Role / Timing Role: Final-stage transient suppressor on 5V or 3.3V internal rails, downstream of primary MOV-based AC protection. Use Value: Delivers precise 90V standoff and low capacitance, avoiding interference with metrology ADC sampling while passing IEC 61000-4-5 Level 3. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ90A | Same DO-214AC (SMA) package; slightly higher VC = 149V @ 20.5A; RθJA = 85°C/W | Lower power density due to larger thermal resistance; requires more PCB copper for same thermal margin | Select when SMA footprint is already standardized and minor clamping voltage increase is acceptable |
| ON Semiconductor 1.5SMC90A | DO-214AB (SMC) package identical to SMDJ90A; VC = 146V @ 20.5A; VF = 3.5V @ 100A; same PPK = 3000W | Functionally identical clamping and thermal specs; fully interchangeable in layout and circuit behavior | Preferred for dual-sourcing where identical mechanical and electrical performance is required |
Compared with SMAJ90A and 1.5SMC90A, the SMDJ90A offers identical DO-214AB packaging and clamping performance to 1.5SMC90A but superior thermal resistance (75°C/W vs. 85°C/W), enabling higher sustained surge duty cycles in thermally constrained designs.
Availability
SMDJ90A is available at Aetrix Electronics and suitable for telecom power input protection, industrial PLC digital I/O protection, automotive body control modules, and smart meter power supply protection requiring stable component supply and full traceability.
Supply support for SMDJ90A 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 Company (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101 qualified product lines.
The SMDJ series was developed specifically for high-power, surface-mount transient suppression in harsh environments - emphasizing ISO 7637-2 compliance, automated assembly readiness, and robust junction passivation for long-term field reliability.
FAQ
What is the maximum clamping voltage of the SMDJ90A under standard 10/1000µs surge conditions?
The SMDJ90A has a maximum clamping voltage (VC) of 146 V when subjected to a 10/1000 µs transient waveform at its rated peak pulse current of 20.5 A. This value is measured per JEDEC standards and guarantees predictable overvoltage limiting for downstream components such as DC-DC controllers or microcontrollers. The SMDJ90A maintains this clamping performance across its specified operating temperature range.
Is the SMDJ90A suitable for bidirectional transient protection?
No, the SMDJ90A is a unidirectional TVS diode intended for DC circuits with defined polarity. For bidirectional protection, Taiwan Semiconductor offers the SMDJ90CA variant (marked "PGX" with "CA" suffix), which provides symmetrical clamping in both directions. Using the unidirectional SMDJ90A in AC or floating applications may result in forward conduction damage during negative half-cycles.
What is the forward voltage drop of the SMDJ90A at high surge current?
The SMDJ90A exhibits a forward voltage (VF) of 3.5 V when conducting 100 A in the forward direction - a specification confirmed for all SMDJ10A through SMDJ90A devices. This parameter is critical for estimating conduction losses during high-current transients and informs thermal design, especially in applications with repetitive surge events.
Does the SMDJ90A meet automotive transient immunity standards?
Yes, the SMDJ90A meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (supply interruption), Pulse 3a (capacitive coupling), and Pulse 3b (ground noise). Its 3000W peak power rating and sub-1ps response enable reliable protection in automotive body control modules, infotainment power supplies, and ADAS sensor interfaces.
What is the moisture sensitivity level (MSL) and reflow profile compatibility for the SMDJ90A?
The SMDJ90A is rated MSL Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH and requires no baking prior to reflow soldering. It supports standard lead-free reflow profiles with peak temperatures up to 260°C, and its matte tin-plated leads comply with J-STD-002 for solderability - making it fully compatible with high-volume automated SMT assembly lines.
SMDJ90A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMDJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 20.5A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMDJ90A FAQ
1.How can I place an order for SMDJ90A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ90A 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 SMDJ90A reliable?
The price and inventory of SMDJ90A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ90A is usually 5 days.
3.What payment methods are accepted for SMDJ90A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ90A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ90A?
SMDJ90A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ90A 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 SMDJ90A?
For technical support, including SMDJ90A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ90A requirements.
6.How does Aetrix verify that SMDJ90A is sourced from the original manufacturer or authorized distributors?
All SMDJ90A 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 SMDJ90A meets industry standards.
7.What is the process for return or replacement of SMDJ90A?
All SMDJ90A units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ90A, 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 SMDJ90A part is unused and in its original packaging.
Return procedure for SMDJ90A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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