HIH-4020-004 Equivalent & Substitute Parts

Part Overview

The HIH-4020-004 is a through-hole mounted analog humidity sensor manufactured by Honeywell Sensing and Productivity Solutions. This sensor measures relative humidity across the full 0–100% RH range with ±3.5% RH accuracy and delivers analog voltage output. The device operates from 4V to 5.8V supply voltage with a 5-second response time and is rated for -40°C to 85°C operating temperature.

The HIH-4020-004 is discontinued at DiGi Electronics. Equivalent substitute parts are available from the same manufacturer within the HIH-4010, HIH-4020, HIH-4021, and HIH-4031 series, all sharing identical electrical performance specifications and RoHS compliance status.

Key Parameters

Parameter	Value
Sensor Type	Humidity
Humidity Range	0–100% RH
Output Type	Analog Voltage
Output	3.268V @ 75.3% RH
Accuracy	±3.5% RH
Response Time	5 s
Voltage Supply	4V–5.8V
Operating Temperature	-40°C to 85°C
Mounting Type	Through Hole
Package / Case	Housed Sensor
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the HIH-4020-004 is determined by strict equivalence across the following electrical and mechanical parameters:

Humidity Range: 0–100% RH (all substitutes match)
Output Type: Analog Voltage (all substitutes match)
Output Voltage: 3.268V @ 75.3% RH (all substitutes match)
Accuracy: ±3.5% RH (all substitutes match)
Response Time: 5 s (all substitutes match)
Supply Voltage: 4V–5.8V (all substitutes match)
Operating Temperature: -40°C to 85°C (all substitutes match)
RoHS Compliance: RoHS Compliant (all substitutes match)
MSL Rating: 1 (Unlimited) (all substitutes match)

Substitute parts are grouped into two categories based on mounting type:

Through-Hole Mounted Substitutes (HIH-4010 series, HIH-4020 series, HIH-4021 series): Direct mechanical and electrical equivalents with identical through-hole mounting.

Surface-Mount Substitute (HIH-4031-003): Functionally equivalent but requires surface-mount assembly; used only when PCB design accommodates SMD mounting.

Parameter Comparison

Part Number	Series	Humidity Range	Accuracy	Output	Supply Voltage	Response Time	Operating Temp	Mounting Type	Product Status	Inventory
HIH-4020-004	HIH-4020	0–100% RH	±3.5% RH	3.268V @ 75.3% RH	4V–5.8V	5 s	-40°C to 85°C	Through Hole	Discontinued	816 Pcs
HIH-4010-001	HIH-4010	0–100% RH	±3.5% RH	3.268V @ 75.3% RH	4V–5.8V	5 s	-40°C to 85°C	Through Hole	Active	1001 Pcs
HIH-4010-002	HIH-4010	0–100% RH	±3.5% RH	3.268V @ 75.3% RH	4V–5.8V	5 s	-40°C to 85°C	Through Hole	Active	1479 Pcs
HIH-4010-003	HIH-4010	0–100% RH	±3.5% RH	3.268V @ 75.3% RH	4V–5.8V	5 s	-40°C to 85°C	Through Hole	Active	847 Pcs
HIH-4010-004	HIH-4010	0–100% RH	±3.5% RH	3.268V @ 75.3% RH	4V–5.8V	5 s	-40°C to 85°C	Through Hole	Active	1026 Pcs
HIH-4020-001	HIH-4020	0–100% RH	±3.5% RH	3.268V @ 75.3% RH	4V–5.8V	5 s	-40°C to 85°C	Through Hole	Active	980 Pcs
HIH-4021-001	HIH-4021	0–100% RH	±3.5% RH	3.268V @ 75.3% RH	4V–5.8V	5 s	-40°C to 85°C	Through Hole	Active	4297 Pcs
HIH-4021-002	HIH-4021	0–100% RH	±3.5% RH	3.268V @ 75.3% RH	4V–5.8V	5 s	-40°C to 85°C	Through Hole	Active	810 Pcs
HIH-4021-003	HIH-4021	0–100% RH	±3.5% RH	3.268V @ 75.3% RH	4V–5.8V	5 s	-40°C to 85°C	Through Hole	Active	6251 Pcs
HIH-4021-004	HIH-4021	0–100% RH	±3.5% RH	3.268V @ 75.3% RH	4V–5.8V	5 s	-40°C to 85°C	Through Hole	Active	1189 Pcs
HIH-4031-003	HIH-4031	0–100% RH	±3.5% RH	3.268V @ 75.3% RH	4V–5.8V	5 s	-40°C to 85°C	Surface Mount	Active	1586 Pcs

Engineering Selection Recommendations

Primary Substitutes (Through-Hole Mounting)

For applications requiring through-hole mounting identical to the HIH-4020-004, select from the following active parts:

HIH-4021-003: 6251 units in stock. Highest inventory availability. Active product status ensures long-term supply continuity.
HIH-4021-001: 4297 units in stock. Second-highest inventory. Active product status.
HIH-4010-002: 1479 units in stock. Active product status.
HIH-4010-004: 1026 units in stock. Active product status.
HIH-4020-001: 980 units in stock. Same series as original part. Active product status.

All listed through-hole substitutes meet identical electrical specifications, RoHS compliance, and MSL rating requirements.

Alternative Substitute (Surface-Mount Mounting)

HIH-4031-003: 1586 units in stock. Functionally equivalent but requires surface-mount PCB assembly. Select only if PCB design accommodates 4-SMD package format. Active product status.

All substitute parts carry RoHS Compliant certification and MSL 1 (Unlimited) rating, matching the original HIH-4020-004 compliance profile.

Frequently Asked Questions (FAQ)

Q: Can HIH-4010, HIH-4020, and HIH-4021 series parts be used interchangeably with HIH-4020-004?

A: Yes. All parts within these series share identical electrical parameters: 0–100% RH humidity range, ±3.5% RH accuracy, 3.268V output at 75.3% RH, 4V–5.8V supply voltage, 5-second response time, and -40°C to 85°C operating temperature. Through-hole mounting is identical across all three series.

Q: What is the difference between through-hole and surface-mount substitutes?

A: Through-hole substitutes (HIH-4010, HIH-4020, HIH-4021 series) mount directly into PCB holes and are soldered from the back side. The surface-mount substitute (HIH-4031-003) uses a 4-SMD package and mounts directly on the PCB surface. Select surface-mount only if your PCB design includes SMD pads for this component.

Q: Why is HIH-4020-004 discontinued while other series remain active?

A: Product discontinuation follows manufacturer lifecycle decisions. Equivalent active alternatives from the same manufacturer provide identical electrical performance and compliance certifications, ensuring design continuity without performance compromise.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry RoHS Compliant certification and MSL 1 (Unlimited) rating, matching the original HIH-4020-004.

Q: Which substitute has the highest inventory availability?

A: HIH-4021-003 has 6251 units in stock, providing the highest inventory availability among all substitutes.

Q: Can I use HIH-4031-003 as a direct replacement for HIH-4020-004?

A: HIH-4031-003 is electrically equivalent but requires surface-mount assembly. Use only if your PCB design supports 4-SMD package mounting. For through-hole applications, select from HIH-4010, HIH-4020, or HIH-4021 series.

Q: Do all substitutes operate at the same supply voltage range?

A: Yes. All substitute parts operate from 4V to 5.8V supply voltage, identical to HIH-4020-004.

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