My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ90CAHE3_A/H
- Part No.:
- SMAJ90CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ90CAHE3_A/H.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,769
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ90CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 90 V standoff voltage (VWM), 100–111 V breakdown range (VBR), 146 V maximum clamping voltage at 2.1 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMAJ90CAHE3_A/H datasheet, SMAJ90CAHE3_A/H pinout, SMAJ90CAHE3_A/H application, or SMAJ90CAHE3_A/H equivalent, key selection criteria include bidirectional surge clamping capability, AEC-Q101 qualification, low thermal resistance (RθJL = 30 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protection element across bidirectional signal or DC bus lines, responding within picoseconds to ESD and lightning-induced surges. Its glass-passivated junction ensures stable breakdown behavior, while the unmarked SMA package confirms bidirectional polarity - no cathode band required.
The SMAJ90CAHE3_A/H delivers 400 W peak pulse power up to 78 V and derates to 300 W above 78 V per JEDEC JESD22-A114 test conditions. It meets MSL level 1 (260 °C reflow peak) and supports repetitive surge duty cycles at ≤0.01 %, making it suitable for intermittent overvoltage events in harsh environments.
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 at 1 mA - guaranteed breakdown onset window for reliable triggering |
| VC @ IPPM | 146 V at 2.1 A - clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM | 400 W - peak surge energy absorption capacity under standard waveform |
| ID @ VWM | 1.0 μA - ultra-low leakage ensuring minimal standby power loss |
| TJ max | +150 °C - enables operation in under-hood automotive and high-temperature industrial enclosures |
| RθJL | 30 °C/W - low junction-to-lead thermal resistance supports power dissipation without heatsinking |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current from either direction; symmetric conduction path |
| Cathode | Transient current exit (bidirectional) | Completes clamping loop regardless of surge polarity; no band marking |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics per stress test requirements |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) when properly mounted |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response) |
| MSL Level 1 | Compatible with standard SMT reflow profiles up to 260 °C peak temperature |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across input rails upstream of DC-DC converters. Use Value: Limits transient excursions to ≤146 V, preventing damage to 36 V-rated input stages in microcontrollers and CAN transceivers. | Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting induced surges on 4–20 mA or 0–10 V output lines. Use Value: 1.0 μA leakage preserves signal integrity and avoids offset errors in precision measurement circuits. |
| Telecom Power Feeds | Consumer USB Power Ports |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from Ethernet cable-induced surges. IC Role / Device Role / Timing Role: Primary rail protector on 48 V DC input before isolation and regulation stages. Use Value: 400 W rating handles combined longitudinal and common-mode transients per IEEE 802.3bt requirements. | Use Scenario: Adding secondary-level surge immunity to USB-C PD input circuits in portable devices. IC Role / Device Role / Timing Role: Back-to-back TVS pair (with complementary unidirectional unit) on VBUS line. Use Value: Bidirectional symmetry eliminates polarity concerns during reversible plug insertion and hot-swap events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90CA-M3 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No difference in circuit design or layout; same thermal and clamping performance | Select when halogen-free compliance is mandated by OEM environmental policy |
| SMBJ90CAHE3_A/H | Same VWM/VBR/VC ratings but in SMB (DO-214AA) package - 25 % larger footprint, 20 % higher PPPM (600 W) | Requires PCB pad revision; better suited for higher-energy surge environments (e.g., industrial motor drives) | Choose only if system-level surge testing exceeds 400 W margin and board space allows larger package |
Compared with SMAJ90CAHE3_A/H, SMAJ90CA-M3 offers identical protection performance with halogen-free materials, while SMBJ90CAHE3_A/H provides higher surge capacity at the cost of increased board area - neither is pin-compatible due to differing package outlines.
Availability
SMAJ90CAHE3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and telecom power feed applications requiring stable component supply across multi-year production cycles.
Supply support for SMAJ90CAHE3_A/H 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability and automotive-grade validation.
The SMAJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated at the component level.
FAQ
What is the clamping voltage of SMAJ90CAHE3_A/H at its rated peak pulse current?
The SMAJ90CAHE3_A/H has a maximum clamping voltage (VC) of 146 V at its specified peak pulse current (IPPM) of 2.1 A under the 10/1000 μs waveform condition. This value is measured per JEDEC standards and guarantees that downstream components see no more than 146 V during a defined surge event. The SMAJ90CAHE3_A/H maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMAJ90CAHE3_A/H suitable for automotive applications?
Yes, SMAJ90CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use in the Vishay ordering nomenclature (HE3 suffix). It undergoes stress testing for temperature cycling, humidity, mechanical shock, and surge endurance per AEC-Q101 Rev D. The SMAJ90CAHE3_A/H is deployed in engine control units, body control modules, and ADAS power supplies where bidirectional transient immunity is required.
Does SMAJ90CAHE3_A/H have polarity markings on the package?
No, SMAJ90CAHE3_A/H does not feature a cathode band or other polarity marking because it is a bidirectional TVS diode. The SMA (DO-214AC) package is symmetric, and both terminals function identically under reverse or forward surge conditions. This eliminates orientation errors during automated placement and simplifies PCB layout compared to unidirectional variants like SMAJ90AHE3_A/H.
What is the thermal resistance from junction to lead for SMAJ90CAHE3_A/H?
The SMAJ90CAHE3_A/H has a typical junction-to-lead thermal resistance (RθJL) of 30 °C/W, as specified in the Vishay datasheet. This low value enables efficient heat transfer from the silicon die to the PCB copper pads through the leads, supporting reliable operation at full power without external heatsinking - especially when mounted on the recommended 5.0 mm × 5.0 mm copper pads per terminal.
How does the peak pulse power rating of SMAJ90CAHE3_A/H change above 78 V?
Per the Vishay datasheet, the SMAJ90CAHE3_A/H maintains a 400 W peak pulse power rating (PPPM) for devices with VWM ≤ 78 V, but derates to 300 W for all parts with VWM > 78 V - including SMAJ90CAHE3_A/H. This reduction reflects increased dynamic resistance at higher standoff voltages and is validated per Fig. 2 in document 88390. The SMAJ90CAHE3_A/H remains fully rated at 300 W under standard 10/1000 μs surge conditions.
SMAJ90CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 2.1A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ90CAHE3_A/H FAQ
1.How can I place an order for SMAJ90CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ90CAHE3_A/H 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 SMAJ90CAHE3_A/H reliable?
The price and inventory of SMAJ90CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ90CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ90CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ90CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ90CAHE3_A/H?
SMAJ90CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ90CAHE3_A/H 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 SMAJ90CAHE3_A/H?
For technical support, including SMAJ90CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ90CAHE3_A/H requirements.
6.How does Aetrix verify that SMAJ90CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ90CAHE3_A/H 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 SMAJ90CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ90CAHE3_A/H?
All SMAJ90CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ90CAHE3_A/H, 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 SMAJ90CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ90CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ90CAHE3_A/H 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
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 …
