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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation ESH1B

Name: ESH1B
Brand: Taiwan Semiconductor Corporation
SKU: ESH1B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ESH1B

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: ESH1B.pdf

Description:: DIODE GEN PURP 100V 1A DO214AC

Quantity:: RFQ Add To RFQ list

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Inventory:15,000

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Product details

Overview

ESH1B from Taiwan Semiconductor is a 1A, 100V ultra-fast surface-mount rectifier diode in DO-214AC (SMA) package, featuring 15ns reverse recovery time, 0.9V forward voltage at 1A, and 30A peak surge current - deployed in DC-DC converters and snubber circuits for high-frequency switching efficiency.

For engineers reviewing the ESH1B datasheet, ESH1B pinout, ESH1B application, or ESH1B equivalent, key selection criteria include repetitive peak reverse voltage (100V), thermal resistance (R_θJL = 35°C/W), junction temperature range (–55°C to +175°C), and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

The ESH1B is a single-die, glass-passivated silicon PN junction rectifier optimized for ultra-fast recovery (trr ≤ 15ns) under IF = 0.5A, IR = 1.0A, Irr = 0.25A conditions. Its low-profile DO-214AC package supports automated placement and meets J-STD-020 moisture sensitivity level 1.

Thermally, it delivers R_θJL = 35°C/W and R_θJA = 85°C/W, enabling reliable operation up to TJ = 175°C. Reverse leakage remains ≤1µA at 25°C and ≤25µA at 125°C under rated V_RRM, with junction capacitance of 16pF at 1MHz/4V.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - maximum non-repetitive reverse voltage the device blocks without breakdown
I_F	1 A - continuous average forward current rating at TA = 25°C with adequate heatsinking
t_rr	15 ns - ultra-fast recovery enables high-frequency switching (>100 kHz) with minimal switching loss
V_F	0.9 V max at I_F = 1A, T_J = 25°C - low conduction loss improves power stage efficiency
I_FSM	30 A - withstands short-duration surge currents typical in inductive load turn-off or startup
R_θJL	35 °C/W - low junction-to-lead thermal resistance supports direct PCB copper pad heat extraction
C_J	16 pF at 1 MHz, V_R = 4 V - low capacitance minimizes high-frequency noise coupling and ringing

Pinout & Package

Package: DO-214AC (SMA), molded epoxy case meeting UL 94V-0; matte tin-plated leads compliant with J-STD-002 solderability; cathode indicated by band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of circuit; must handle full I_F and I_FSM current paths
Cathode	Forward current exit / reverse voltage blocking terminal	Marked by band; connects to higher-potential node; sustains full V_RRM during off-state

Key Features

Feature	Design Value
Glass passivated junction	Enhances long-term reliability and humidity resistance in unsealed industrial environments
Ultra-fast trr ≤ 15 ns	Reduces switching losses in high-frequency SMPS, improving efficiency over standard rectifiers
DO-214AC (SMA) package	Enables automated SMT assembly and provides mechanical robustness with 0.060g weight
J-STD-020 Level 1 MSL	Allows unlimited floor life before reflow; no bake required prior to assembly
RoHS & halogen-free	Complies with IEC 61249-2-21 and EU RoHS Directive for environmentally regulated end equipment

Applications

DC-DC Converter	Snubber Circuit
Use Scenario: Secondary-side rectification in isolated flyback or forward converters operating at 100–500 kHz. IC Role / Device Role / Timing Role: Ultra-fast freewheeling rectifier handling discontinuous conduction mode (DCM) transitions. Use Value: 15ns t_rr minimizes reverse recovery charge (Q_rr), reducing voltage spikes and MOSFET stress during turn-on.	Use Scenario: RC snubber across switching FETs or transformer windings in motor drives and inverters. IC Role / Device Role / Timing Role: Fast clamping diode that absorbs inductive energy during switching edges. Use Value: Low V_F (0.9V) and fast t_rr ensure rapid voltage clamping with minimal power dissipation in the snubber network.
Lighting Application	Freewheeling Application
Use Scenario: Output rectification in LED driver power supplies with PWM dimming and high-frequency operation. IC Role / Device Role / Timing Role: Primary output rectifier in constant-current LED drivers requiring low EMI and thermal stability. Use Value: 175°C T_JMAX and 35°C/W R_θJL support compact thermal design in enclosed luminaires.	Use Scenario: Freewheeling path for inductive loads such as solenoids, relays, and DC motor armatures. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path when inductive current is interrupted. Use Value: 30A I_FSM withstands high-energy flyback pulses without degradation, extending system lifetime.

DC-DC Converter

Snubber Circuit

Use Scenario: Secondary-side rectification in isolated flyback or forward converters operating at 100–500 kHz.

IC Role / Device Role / Timing Role: Ultra-fast freewheeling rectifier handling discontinuous conduction mode (DCM) transitions.

Use Value: 15ns t_rr minimizes reverse recovery charge (Q_rr), reducing voltage spikes and MOSFET stress during turn-on.

Use Scenario: RC snubber across switching FETs or transformer windings in motor drives and inverters.

IC Role / Device Role / Timing Role: Fast clamping diode that absorbs inductive energy during switching edges.

Use Value: Low V_F (0.9V) and fast t_rr ensure rapid voltage clamping with minimal power dissipation in the snubber network.

Lighting Application

Freewheeling Application

Use Scenario: Output rectification in LED driver power supplies with PWM dimming and high-frequency operation.

IC Role / Device Role / Timing Role: Primary output rectifier in constant-current LED drivers requiring low EMI and thermal stability.

Use Value: 175°C T_JMAX and 35°C/W R_θJL support compact thermal design in enclosed luminaires.

Use Scenario: Freewheeling path for inductive loads such as solenoids, relays, and DC motor armatures.

IC Role / Device Role / Timing Role: Provides low-loss current recirculation path when inductive current is interrupted.

Use Value: 30A I_FSM withstands high-energy flyback pulses without degradation, extending system lifetime.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-fast rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	V_RRM = 600V, t_rr = 25ns, V_F = 1.15V @ 1A - higher voltage rating but slower recovery and higher conduction loss	Suitable for higher-voltage PFC stages; less optimal for 100V-class high-frequency DC-DC where speed and V_F dominate	Select ESH1B when V_RRM ≤ 100V and t_rr < 20ns is critical for efficiency
MBR1100	Schottky structure, V_F = 0.85V @ 1A, V_RRM = 100V, but leakage >100µA @ 125°C - no reverse recovery but higher thermal leakage	Better for low-V_F priority at ambient temperatures; unsuitable for high-T_J freewheeling due to leakage-driven thermal runaway risk	Prefer ESH1B in high-temperature (>100°C) freewheeling or snubber roles where leakage stability matters

Compared with STTH1R06 and MBR1100, the ESH1B uniquely balances 100V V_RRM, 15ns t_rr, sub-1V V_F, and low leakage (<25µA @ 125°C), making it optimal for thermally constrained, high-frequency 100V rectification where both speed and thermal stability are required.

Availability

ESH1B is available at Aetrix Electronics and suitable for DC-DC converters, snubber circuits, lighting applications, and freewheeling paths requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.

Supply support for ESH1B 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 power rectifiers, TVS diodes, and MOSFETs for industrial and consumer markets.

The ESH1B belongs to TSC's ESH1x ultra-fast rectifier family, designed specifically for high-efficiency, high-frequency power conversion in space-constrained surface-mount applications where fast recovery and thermal robustness are essential.

FAQ

What is the maximum junction temperature rating for the ESH1B?

The ESH1B has a maximum junction temperature (T_JMAX) of +175°C, allowing operation in high-ambient environments such as enclosed LED drivers or industrial motor controls. This rating is validated per absolute maximum ratings in the official TSC datasheet F2102 and supports sustained 1A forward current with appropriate PCB copper area for thermal dissipation. The ESH1B maintains parameter stability up to this limit without derating until thermal shutdown occurs.

Does the ESH1B have a specified reverse recovery time, and under what test conditions?

Yes, the ESH1B specifies a maximum reverse recovery time (t_rr) of 15 ns, measured under IF = 0.5A, IR = 1.0A, and Irr = 0.25A per the official TSC datasheet F2102. This ultra-fast recovery enables efficient operation in switching frequencies above 200 kHz. The ESH1B's t_rr is confirmed via standardized double-pulse testing and is a key differentiator versus standard fast recovery diodes with t_rr > 50 ns.

Is the ESH1B RoHS and halogen-free compliant?

Yes, the ESH1B is fully RoHS compliant and halogen-free per IEC 61249-2-21, as stated in the official TSC documentation. The molding compound contains no brominated flame retardants, and the matte tin-plated leads meet J-STD-002 solderability requirements. This compliance ensures suitability for export to EU, Japan, and other regulated markets - a verified attribute of the ESH1B, not inferred from family-level claims.

What is the marking code and polarity identification method for the ESH1B?

The ESH1B is marked "ESH1B" on the device body, with polarity indicated by a distinct cathode band at the cathode end of the DO-214AC (SMA) package. This band aligns with industry-standard diode orientation and is visible under standard optical inspection. The marking is laser-etched per TSC specification F2102 and matches the ordering code defined in the official datasheet - confirming unambiguous identification during automated optical inspection (AOI) and manual assembly.

What is the thermal resistance from junction to lead (R_θJL) for the ESH1B, and how does it impact PCB layout?

The ESH1B has a typical junction-to-lead thermal resistance (R_θJL) of 35°C/W, meaning each watt of power dissipated raises the junction temperature 35°C above the lead temperature. To leverage this, PCB layout must use ≥25 mm² of 1 oz. copper connected directly to both anode and cathode pads. This value is measured per JEDEC standards and is critical for achieving the full 175°C T_JMAX rating - a confirmed thermal spec for the ESH1B, not estimated or extrapolated.

ESH1B Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 100 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 15 ns

Current - Reverse Leakage @ Vr:: 1 µA @ 100 V

Capacitance @ Vr, F:: 16pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

Operating Temperature - Junction:: -55°C ~ 175°C

ESH1B FAQ

1.How can I place an order for ESH1B through Aetrix?

Please submit a Request for Quotation (RFQ) for ESH1B 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 ESH1B reliable?

The price and inventory of ESH1B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ESH1B is usually 5 days.

3.What payment methods are accepted for ESH1B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ESH1B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ESH1B?

ESH1B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ESH1B 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 ESH1B?

For technical support, including ESH1B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ESH1B requirements.

6.How does Aetrix verify that ESH1B is sourced from the original manufacturer or authorized distributors?

All ESH1B 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 ESH1B meets industry standards.

7.What is the process for return or replacement of ESH1B?

All ESH1B units undergo pre-shipment inspection (PSI). If there is an issue with ESH1B, 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 ESH1B part is unused and in its original packaging.

Return procedure for ESH1B:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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